JP4728904B2 - Driving information recording device - Google Patents

Description

  The present invention relates to a driving information recording apparatus that circulates and stores driving information related to driving of a vehicle and records driving information on a recording medium based on the state of the vehicle.

  2. Description of the Related Art Conventionally, a vehicle allocation system that employs, for example, a 400 MHz band digital radio, expands the amount of data communication, and improves the collection accuracy of vehicle position information and the like has been put into practical use. According to this vehicle allocation system, since the collection accuracy of vehicle position information and the like has been improved, it is possible to improve the work efficiency of the vehicle allocation staff and crew members who distribute vehicles. By the way, driving information related to vehicle driving, for example, the traveling speed of the vehicle (hereinafter referred to as “vehicle speed”) is circulated and recorded. If there is an accident such as a vehicle collision, the recorded driving information such as the vehicle speed is recorded separately. A technique for recording on a medium has been proposed (see, for example, Patent Document 1).

  The vehicle speed may be acquired from a vehicle speed pulse of the vehicle, or may be acquired from information (hereinafter referred to as “vehicle speed information”) indicating the vehicle speed output from the GPS receiver. In the conventional technology driving information recording device, it is information indicating whether the vehicle speed is acquired from the vehicle speed pulse or the vehicle speed is acquired from the vehicle speed information output from the GPS receiver, and acquisition related to the acquisition of the vehicle speed is performed. Information is configured to be recorded in advance in a setting file of a recording medium. In the driving information recording device, the acquisition information recorded in the setting file of the recording medium is read, and the vehicle speed is acquired based on the read acquisition information.

JP-A 63-16785

  In the configuration where the acquisition information related to the acquisition of the vehicle speed recorded in the setting file of the recording medium is read in advance and the vehicle speed is acquired based on the read acquisition information, the acquisition information recorded in the setting file of the recording medium is If it is not the acquisition information that the user originally wants to set, for example, information indicating that the vehicle speed is acquired from the vehicle speed information output from the GPS receiver, even though it is desired to acquire the vehicle speed from the vehicle speed pulse, If it is recorded in the setting file by mistake, there occurs a problem that the accurate vehicle speed cannot be acquired or the vehicle speed cannot be acquired reliably.

When the vehicle speed is obtained from the vehicle speed pulse, the global positioning system (Global Positioning
System: Abbreviation: GPS) When the vehicle speed is acquired from the vehicle speed information output from the receiver, the vehicle speed is acquired from the vehicle speed information output from the GPS receiver when the vehicle speed is acquired from the vehicle speed pulse. Although it is possible to detect the vehicle speed more accurately, there is a problem that the vehicle speed cannot be acquired when the vehicle speed pulse is not detected due to disconnection or the like.

  When acquiring the vehicle speed based on the vehicle speed information output from the GPS receiver, the GPS receiver cannot receive radio waves when the vehicle enters a tunnel or the like, so the vehicle speed information is not output and the vehicle speed is acquired. There is a problem that it becomes impossible to do.

  An object of the present invention is to provide a driving information recording apparatus capable of reliably detecting a vehicle speed.

According to the present invention (1), a plurality of radio signals are received by the receiving means. The vehicle speed measuring means measures the traveling speed of the vehicle based on each radio signal received by the receiving means. The pulse detection means detects a vehicle speed pulse. The vehicle speed detection means detects the traveling speed of the vehicle based on the vehicle speed pulse detected by the pulse detection means. Switching means, when the traveling speed measured by the vehicle speed measuring means is equal to or higher than a predetermined speed, the vehicle speed detection mode for detecting the traveling speed of the vehicle by the vehicle speed detecting means, Ru is measured running speed of the vehicle by the vehicle speed measuring means speed It switched to the measurement mode.

According to the present invention (1), when the traveling speed measured by the vehicle speed measuring means is greater than or equal to the predetermined speed by the switching means, the vehicle speed detecting means detects the vehicle traveling speed by the vehicle speed detecting means. It is switched to the speed measurement mode in which the running speed of the vehicle is measured. Therefore, it is possible to reliably acquire the vehicle speed.

  Further, even when the vehicle speed pulse is not detected by the vehicle speed detection means because the signal line for transmitting the vehicle speed pulse is disconnected in the vehicle speed detection mode, the switching means can switch the vehicle speed detection mode to the vehicle speed measurement mode. It can be acquired with certainty.

  Hereinafter, a plurality of modes for carrying out the present invention will be described. In the following description, portions corresponding to the matters described in the preceding embodiments are denoted by the same reference numerals, and redundant descriptions may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. Not only the combination of the parts specifically described in each embodiment, but also each embodiment may be partially combined if there is no particular problem with the combination. The operation information recording apparatus (hereinafter sometimes referred to as “drive recorder”) according to the present embodiment is suitably mounted on a transport truck having a battery voltage of 24 volts, for example. However, the applicable vehicle is not limited to a transport truck, and may be mounted on a taxi with a battery voltage of 12 volts, for example. The following description includes a description of the driving information recording method.

  FIG. 1 is a diagram illustrating an example of the configuration of the center device. FIG. 2 is a perspective view showing the drive recorder 1. The drive recorder 1, which is a driving information recording device, circulates and stores driving information related to driving of the vehicle, and when a predetermined condition is satisfied, the driving recorder 1 associates the driving information and the like with image and audio information, a recording medium, Specifically, the information is recorded on a compact flash (registered trademark) card (hereinafter sometimes referred to as “CF card”) 2. The CF card 2 is an electrical connection between a flash memory that does not lose its memory even when it is not energized, and a controller circuit that is responsible for input / output with the outside.

  The center device is configured to be able to analyze and output information recorded on the CF card 2. The center device includes a personal computer (hereinafter referred to as “PC”) 3 for analyzing information, a CF card reader 4 for reading information recorded on the CF card 2, a display 5 for outputting analyzed information, and a printer 6. These are electrically connected. By installing application software such as predetermined image analysis software in the PC 3, the computing means of the PC 3 is configured to be able to analyze information. However, application software is not limited to image analysis software.

  The drive recorder 1 includes a drive recorder main body 7 that is a driving information recording apparatus main body, a camera 8 that is an imaging means, a microphone 9 that acquires sound information in the vehicle interior, and a switch that includes a function of a recording switch (hereinafter referred to as “recording switch”). There is 10). The camera 8, the microphone 9, and the switch 10 are electrically connected to the drive recorder main body 7 and provided separately. The vehicle is provided with at least one camera 8. The camera 8 is realized by a CCD (Charge Coupled Device) camera. The camera 8 is fixed to the vehicle so as to photograph the front of the vehicle. It is also possible to fix the additional camera to the vehicle in order to take a picture other than the front of the vehicle, for example, behind the vehicle.

The drive recorder main body 7 is formed with an insertion slot 7a through which the CF card 2 can be inserted and removed. The recording medium that can be inserted into and removed from the insertion slot 7a is not limited to the CF card 2 described above, and for example, SD
(Secure Digital) Memory cards, memory sticks and smart media may be used.

FIG. 3 is a block diagram showing an electrical configuration of the drive recorder 1. The configuration of the drive recorder 1 will be described with reference to FIG. The drive recorder body 7 includes a CPU (Central Processing Unit) 11 as a control means, a flash ROM (Flash Read Only).
Memory: Abbreviation: F-ROM) 12, RAM (Random Access Memory) 13 as storage means, CF card interface (abbreviation: CF card IF) 14, JPEG IC (JPEG: Joint Photographic coding Experts Group, IC: Integrated Circuit)
15, a video switch (abbreviation: video SW) 16 and a light emitting diode 17.

  The drive recorder body 7 includes a USB HOST 18 which is a means having a USB (Universal Serial Bus) host function, a USB interface (abbreviation: USB IF) 19, a communication driver 20, an LCD (Liquid Crystal Display) operating device connector 21, and a buffer 22. , A start signal detection circuit 23 for detecting a vehicle signal including a power start signal of a Hi / Lo signal given from the vehicle, a watchdog IC (abbreviation: WD IC) 24 having a watchdog function, a power supply unit 25, a G sensor 26, It further has a GPS (Global Positioning System) receiver 40, a GPS antenna 41, and a counter (not shown) that counts vehicle speed pulses. An LCD controller 27 capable of inputting crew data is connectable to the LCD controller connector 21.

  The G sensor 26 as detection means is a sensor that detects gravitational acceleration in three axial directions orthogonal to each other. More specifically, the G sensor 26 can detect a gravitational acceleration acting in the longitudinal direction, the lateral direction, and the vertical direction of the vehicle, that is, a so-called G sensor output value. The front direction and the rear side of the crew seated in the vehicle are defined as the front-rear direction, and the left and right directions of the crew seated in the vehicle are defined as the left-right direction. The vertical direction is defined as the vertical direction. The CPU 11 records the driving information stored in the RAM 13 on the CF card 2 with the output value of at least one of the longitudinal acceleration, lateral acceleration, and vertical acceleration detected by the G sensor 26 as a recording start condition. Control.

  For example, the CPU 11 detects the gravitational acceleration in the vertical direction based on the mounting orientation of the drive recorder body 7 to the vehicle with the insertion slot 7a of the CF card 2 as a reference (a reference that does not prevent the insertion and removal of the CF card 2). Specify the axial direction to be performed. Specifically, using the input means 3a and the calculation means of the PC 3 of the center device, the vertical direction is determined based on the mounting posture of the drive recorder body 7 with respect to the insertion slot 7a of the CF card 2 to the vehicle. The calculation which specifies the axial direction which detects a gravitational acceleration is performed.

  The calculation means of the PC 3 performs control to record the calculated data on the CF card 2. The CF card 2 is inserted into the insertion slot 7a of the drive recorder main body 7, and based on the data recorded on the CF card 2, the CPU 11 of the drive recorder main body 7 specifies the axial direction for detecting the vertical gravitational acceleration. To do. Further, the CPU 11 specifies an axial direction for detecting the vertical gravitational acceleration based on the output value of the gravitational acceleration acting in the downward direction, and based on the change in the output value of the gravitational acceleration at the start of traveling of the vehicle, It has a function of specifying the axial direction for detecting the gravitational acceleration in the direction. In this case, even if the gravity acceleration in the vertical direction is not detected on the center side in advance, the gravity acceleration in the vertical direction is automatically detected when the drive recorder body 7 is attached to the vehicle, and the remaining two axes are It can be specified as a horizontal axis. As described above, using the insertion slot 7a of the CF card 2 as a reference is an example, and the reference is not limited to the insertion slot 7a alone. For example, any device or part may be used as a reference as long as the orientation of the apparatus main body can be specified, such as a recording switch.

  An outline of offset adjustment of the G sensor 26 using the recording switch 10 will be described. In the present embodiment, there may be a situation where the drive recorder main body 7 incorporating the G sensor 26 cannot be installed completely horizontally, so that offset adjustment for correcting the front-rear and left-right offsets of the G sensor 26 is performed. Yes. When the drive recorder body 7 is powered on or during operation of the drive recorder 1, an offset adjustment setting mode (so-called long press, for example, an operation of continuously pressing the recording switch 10 for 3 seconds or more, for example, a long press) (Hereinafter referred to as “offset mode”). In other words, the CPU 11 determines whether or not the recording switch 10 has been operated in advance under the power activation start condition. If the determination is “NO”, the process is terminated, and if it is determined that a predetermined operation has been performed, the CPU 11 enters an offset adjustment setting mode.

  The offset of the G sensor 26 is adjusted by further operating the recording switch 10 in the state of entering the setting mode. That is, the CPU 11 determines whether or not the recording switch 10 has been operated after shifting to the setting mode, and adjusts the offset of the G sensor 26 based on the determination that it has been operated. If the determination is “NO”, the setting mode is returned to and the recording switch 10 is awaiting operation. After the offset adjustment of the G sensor 26, this process is terminated.

The F-ROM 12 stores a control program for comprehensively controlling the hardware resources constituting the drive recorder main body 7. The RAM 13 is a first SD-RAM.
(Synchronous Dynamic Random Access Memory) 28 and a second SD-RAM 29 are provided. The first SD-RAM 28 temporarily stores the image data converted into the JPEG format by the JPEG IC 15. The second SD-RAM 29 is a vehicle traveling speed measured based on a G sensor output value detected by the G sensor 26, a vehicle speed sensor 33 described later, or a radio wave signal received by a GPS receiver 40 described later. Information (hereinafter referred to as “vehicle speed”), vehicle information such as a vehicle signal detected by the activation signal detection circuit 23, image information converted into the JPEG format, audio information input to the microphone 9, etc. Memorize temporarily.

  The CPU 11 is electrically connected to the F-ROM 12, the second SD-RAM 29, and the CF card IF 14. The first SD-RAM 28 and the video SW 16 are electrically connected to the CPU 11 via the JPEG IC 15. The video SW 16 is a change-over switch for switching a plurality of cameras 8 that capture images at predetermined time intervals when a plurality of cameras 8 are provided.

  A USB IF 19 is electrically connected to the CPU 11 via a USB HOST 18, and a communication driver 20, an LCD operation device connector 21, a buffer 22, a WD IC 24, and a G sensor 26 are electrically connected to the CPU 11. The buffer 22 is electrically connected to the activation signal detection circuit 23. A power supply unit 25 is electrically connected to the WD IC 24. If the power activation signal cannot be obtained, the input from the communication driver 20 is switched to the input to the GPS antenna 41 by the switch 30. In this case, the position of the vehicle can be detected from the GPS alone.

  The GPS receiver 40 receives a plurality of radio signals transmitted from a GPS satellite (not shown) via the GPS antenna 41. The GPS receiver 40 gives a plurality of received radio wave signals to the CPU 11. The CPU 11 measures vehicle speed information, time information, and position information based on a plurality of radio signals given from the GPS receiver 40.

  The receiving means of this embodiment corresponds to the GPS receiver 40 and the GPS antenna 41. The pulse detection means corresponds to the vehicle speed sensor 33. The vehicle speed measuring means and the vehicle speed detecting means correspond to the CPU 11 and the F-ROM 12. The switching means and determination means correspond to the CPU 11.

  Next, image recording conditions and the like will be described. FIG. 4 is a diagram illustrating a mode in which still image information is recorded on the CF card 2 at regular intervals δ based on the G sensor output value 31 and the speed change 32. FIG. 5 is a diagram illustrating a relationship between part of the image information and position information. The CPU 11 converts the input image captured by the camera 8 and input to the drive recorder main body 7 into image information in JPEG format by the JPEG IC 15, and temporarily stores the image information converted into JPEG format in the first SD-RAM 28. Let Thereafter, the CPU 11 causes the second SD-RAM 29 to sequentially record the image information converted into the JPEG format. At this time, one still image is stored in the second SD-RAM 29 in the form of “image * .jpg” (see FIG. 5). The “*” is an integer.

  As additional information of the still image, the CPU 11 outputs the G sensor output value of the vehicle, position information, time information, vehicle speed information from the vehicle speed sensor 33 (see FIG. 3) or GPS receiver 40, and sound from the microphone 9. Information is sequentially stored in the second SD-RAM 29.

  When a predetermined recording condition is satisfied, the CPU 11 causes the CF card 2 to record the JPEG converted image, G sensor output value, position information, time information, and vehicle speed information stored in the second SD-RAM 29. In this embodiment, for example, 10 still images are recorded on the CF card 2 per second, and 300 still images can be recorded on the CF card 2 for one event at a maximum of 30 seconds. One event is synonymous with one state that satisfies a predetermined recording condition.

  More specifically, as shown in FIG. 5, for example, the CF card 2 has an image information group composed of 300 still images “image 1.jpg”,..., “Image 300.jpg” in a maximum of 30 seconds. File name “image 0”,..., “Image 299” of each still image that is recorded and included in the image information group, and includes the vehicle position information, time information, G sensor output value, and vehicle speed information. Information associated with vehicle information is recorded in the CF card 2 as additional information of the image information group.

  Next, switching processing for acquiring vehicle speed information will be described. As a method of acquiring the vehicle speed information, there are a method of acquiring based on a vehicle speed pulse detected by the vehicle speed sensor 33 and a method of acquiring by measuring based on a radio wave signal received by the GPS receiver 40. When acquiring the vehicle speed information, if it is fixed and acquired in any one of these two acquisition methods, the accurate vehicle speed cannot be acquired as in the prior art, or the vehicle speed is surely obtained. Such as inability to obtain the password.

  Therefore, in the present embodiment, when the vehicle speed information is acquired based on the vehicle speed pulse detected by the vehicle speed sensor 33 (hereinafter referred to as “vehicle speed detection mode”), the vehicle speed information is obtained based on the radio wave signal received by the GPS receiver 40. A case where measurement is obtained (hereinafter referred to as “vehicle speed measurement mode”) is configured to be switchable based on a predetermined condition.

  In the CF card 2, vehicle speed acquisition information indicating in which mode the vehicle speed is acquired in the vehicle speed detection mode or the vehicle speed measurement mode when the drive recorder 1 is operated is recorded in advance using the input means of the PC 3 of the center device. The When the vehicle speed detection mode is selected and recorded on the CF card 2 as the vehicle speed acquisition information, pulse type information indicating the type of vehicle speed pulse is also recorded on the CF card 2 together. The types of vehicle speed pulses include an electric type and a mechanical type, and can be set according to the vehicle. When the CF card 2 on which such vehicle speed acquisition information and pulse type information are recorded is attached to the drive recorder 1, the vehicle speed acquisition information and pulse type information are read out by the CPU 11, and an operation based on each information is executed.

  The type of vehicle speed pulse can be set according to the vehicle as described above. However, if this setting is incorrect or the signal line that transmits the vehicle speed pulse is disconnected, the vehicle speed pulse cannot be detected. When this occurs, it is necessary to shift from the vehicle speed detection mode to the vehicle speed measurement mode using GPS. Therefore, when the vehicle speed in the vehicle speed detection mode and the vehicle speed in the vehicle speed measurement mode are different by 10 km / h or more, the vehicle speed measurement mode is set.

  FIG. 6 is a flowchart showing a processing procedure of the CPU 11 regarding switching of acquisition of vehicle speed information. This will be described with reference to FIG. This process starts under the condition that the drive recorder body 7 is powered on. This process is executed by the CPU 11. After the start of this process, the process proceeds to step a1.

  In step a1, vehicle speed information is acquired based on the radio wave signal set in the vehicle speed measurement mode and received by the GPS receiver 40 via the GPS antenna 41. Next, the process proceeds to step a2, and it is determined whether or not the speed represented by the vehicle speed information acquired based on the radio wave signal received by the GPS receiver 40 is a predetermined speed, which is 30 km / h or more in the present embodiment. If it is 30 km / h or more, it is determined that the speed represented by the acquired vehicle speed information is a relatively reliable speed, and the process proceeds to step a3. If it is less than 30 km / h, the acquired vehicle speed information is The speed to be expressed is determined to be a relatively unreliable speed, and the process waits until the speed reaches 30 km / h or higher.

  In step a3, the vehicle speed pulse is checked via the vehicle speed sensor 33 and temporarily stored in, for example, the second SD-RAM 29. Next, the process proceeds to step a4, where it is determined whether there is an input of a vehicle speed pulse output from the vehicle speed sensor 33. If there is an input of the vehicle speed pulse to the CPU 11, the process proceeds to step a5, where the input of the vehicle speed pulse is received. Otherwise, it is determined that the vehicle is in a state where it cannot receive a radio signal from a GPS satellite, for example, by entering a tunnel, and waits until a vehicle speed pulse is input.

  In step a5, the setting is switched from the vehicle speed measurement mode to a vehicle speed detection mode, that is, a mode for acquiring vehicle speed information based on the vehicle speed pulse detected by the vehicle speed sensor 33. Therefore, the vehicle speed information is acquired based on the vehicle speed pulse. Next, the process proceeds to step a6, the same processing as in step a3 described above is performed, and the process proceeds to step a7.

  In step a7, it is determined whether or not the vehicle speed pulse output from the vehicle speed sensor 33 is input to the CPU 11. If there is no vehicle speed pulse input, the process proceeds to step a8. If there is a vehicle speed pulse input, the process proceeds to step a6. Return.

  In step a8, it is determined whether or not the speed represented by the vehicle speed information acquired based on the radio signal received by the GPS receiver 40 is a predetermined speed, which is 30 km / h or more in the present embodiment, and is 30 km / h or more. If so, it is determined that the speed represented by the acquired vehicle speed information is a relatively reliable speed, and the process proceeds to step a9. If the speed is less than 30 km / h, the speed represented by the acquired vehicle speed information is compared. It is determined that the speed is low and the process returns to step a6.

  In step a9, the setting is switched from the vehicle speed detection mode to the vehicle speed measurement mode, that is, the mode in which vehicle speed information is acquired based on the radio wave signal received by the GPS receiver 40 via the GPS antenna 41, and the process returns to step a2 and the same as described above. Perform the process.

  As described above, according to the present embodiment, when the predetermined condition, specifically, the condition that the vehicle speed is equal to or higher than the predetermined speed, is satisfied, either one of the vehicle speed measurement mode and the vehicle speed detection mode is executed by the CPU 11. The mode is switched from one mode to the other mode. Thus, for example, in the vehicle speed measurement mode, when the vehicle speed pulse is detected by the vehicle speed sensor 33 and the vehicle speed pulse is input to the CPU 11, the vehicle speed can be detected by the CPU 11 with higher accuracy than in the vehicle speed measurement mode. Switch to detection mode. Therefore, an accurate vehicle speed can be acquired as compared with the vehicle speed measurement mode.

  Further, even when the vehicle speed pulse is not detected by the vehicle speed sensor 33 because the signal line for transmitting the vehicle speed pulse is disconnected in the vehicle speed detection mode, the CPU 11 can switch from the vehicle speed detection mode to the vehicle speed measurement mode. Can be obtained.

  According to the present embodiment, in the vehicle speed measurement mode, when the speed represented by the vehicle information measured based on the radio wave signal received by the GPS receiver 40 is equal to or higher than a predetermined speed, the vehicle speed sensor 33 detects the vehicle speed pulse. The CPU 11 determines whether or not it has been done. When the CPU 11 determines that a vehicle speed pulse is detected by the vehicle speed sensor 33, the CPU 11 switches from the vehicle speed measurement mode to the vehicle speed detection mode. As a result, when the vehicle speed pulse is detected by the vehicle speed sensor 33 in the vehicle speed measurement mode, the CPU 11 switches to the vehicle speed detection mode in which the vehicle speed can be detected with higher accuracy than the vehicle speed measurement mode. Compared to this, the vehicle speed can be acquired accurately.

  Further, according to the present embodiment, in the vehicle speed detection mode, when the speed represented by the vehicle information detected by the vehicle speed sensor 33 is equal to or higher than a predetermined speed, it is determined whether the vehicle speed pulse is detected by the vehicle speed sensor 33 or not. Is judged by. When the CPU 11 determines that the vehicle speed pulse is detected by the vehicle speed sensor 33, the CPU 11 switches from the vehicle speed detection mode to the vehicle speed measurement mode. Thus, even when the vehicle speed pulse is not detected by the vehicle speed sensor 33 because the signal line for transmitting the vehicle speed pulse is disconnected in the vehicle speed detection mode, the CPU 11 switches to the vehicle speed measurement mode, so that the vehicle speed is reliably acquired. be able to.

  FIG. 7 is a diagram showing the relationship between the G sensor output value 31 exceeding the threshold and the recording range Rh of the image information recorded on the CF card 2. This will be described with reference to FIGS. When the G sensor output value 31 exceeds the threshold value Gmax or Gmin as a recording condition, and the vehicle decelerates rapidly, for example, decelerates 15 km / h for a certain time (1 second), the CPU 11 performs an accident and dangerous driving, in other words. It is determined that the image recording conditions are satisfied. The CPU 11 acquires the vehicle speed by a vehicle speed pulse, for example, every 0.1 second, and determines whether there is a specified speed change, that is, the sudden deceleration. The judgment criteria for the presence or absence of sudden deceleration can be set for each road segment, for example, a general road or a highway. Therefore, an image having a high probability of accident or dangerous driving can be reliably recorded on the CF card 2.

  The present applicant has developed a drive recorder that detects gravitational acceleration using a G sensor to record images of accidents and dangerous driving, and the threshold value, that is, the G detection value, is constant regardless of the traveling speed. In the drive recorder, when traveling on a step or a curve, the G sensor output value tends to be larger when traveling at a high speed than when traveling at a low speed. If the G detection value is set high considering high speed driving, the accident image during low speed driving is not recorded on the CF card. If the G detection value is set low considering low speed driving, the CF card is used during high speed driving. Will cause unnecessary images to be recorded.

  On the other hand, in the drive recorder 1 according to the present embodiment, the G detection value at the time of low speed traveling and at the time of high speed traveling can be set individually, and the G detection value to be set according to the vehicle speed at the time of traveling is automatically set. By discriminating into the above, the above-mentioned problem is solved. More specifically, the G detection value setting mode is set with the CF card 2 inserted into the CF card reader 4 using the input means 3a and calculation means of the PC 3 of the center device. In the G detection value setting mode, the calculation means of the PC 3 determines whether or not a G detection value at low speed traveling and a G detection value at high speed traveling are input. If the determination is “NO”, the G detection value input wait state is entered. When it is determined that each G detection value is input, the calculation means of the PC 3 performs control to record each G detection value on the CF card 2.

  Whether the CF card 2 is inserted into the insertion slot 7a of the drive recorder main body 7 and, based on the G detection values recorded on the CF card 2, the CPU 11 has exceeded the G detection value during low-speed driving or not And at the time of high speed traveling, it is determined whether or not the G detection value at the time of high speed traveling has been exceeded. In the present embodiment, the G detection value is set in two stages of low speed driving and high speed driving, but the vehicle speed condition is not limited to the above two stages, but is set to three or more stages and each A G detection value at each stage may be set. In this case, the probability that accidents and dangerous driving are recorded in the CF card 2 can be further increased.

  The applicant of the present application has developed a drive recorder that has G detection values and detection times as parameters for recording images, and sets these parameters using the input means and calculation means of the PC of the center device. The computing means of the PC controls to record the set G detection value and detection time on the CF card. A CF card is inserted into the insertion slot of the drive recorder body, and the drive recorder is operated based on the G detection value and detection time recorded on the CF card. It is difficult for the user to know what value should be set when setting the G detection value and detection time without knowing what waveform the G sensor output value will output in the event of an accident.

  In the present embodiment, the PC 3 of the center device performs “sensitive mode” (for example, G detection value of 0.3 G), “standard mode” (for example, G detection value of 0.4 G), and “insensitive mode” (for example, 0. A simple selection mode (G detection value of 5G) was added. By adding such a simple selection mode, the user can select “sensitive mode” if he / she wants to record an image on the CF card 2 even with a small G sensor output value, and “sensitive mode” if he / she wants to record only a large impact. Can be selected sensuously as a “standard mode” when recording a standard value. Therefore, the G detection value can be set easily and easily. In the present embodiment, three modes can be selected, but two modes may be selectable, or four or more modes may be selectable.

In the drive recorder main body 7 described above, a JPEG converted image, its G sensor output value, position, time, and vehicle speed information recorded in a circular manner in the second SD-RAM 29 over a recording range of up to 30 seconds on the basis of the threshold excess point. And voice information from the microphone 9 are recorded on the CF card 2. In the following description, the point in time at which the threshold is exceeded may be referred to as a trigger occurrence. The time obtained by adding the recording time T _aft seconds after the occurrence of the trigger to the recording time T _bef seconds before the occurrence of the trigger corresponds to the total time of the recording range in one event. A maximum of 30 seconds can be set in a range of 5 seconds to 25 seconds before the trigger occurrence and 5 seconds to 25 seconds after the trigger occurrence.

  When the G sensor output value exceeds a threshold value set continuously for a certain period of time, the applicant of the present application has judged an accident and dangerous driving and has recorded an image or the like on the CF card 2. In the case of a passenger car, there is no problem with such a detection method. However, in the case of a large vehicle such as a truck, there is a possibility that the G sensor output value is not detected so large at the time of an accident. It seems that this problem can be solved if the threshold value is lowered. However, if the threshold value is set low, the G sensor output value exceeds the threshold value due to mere vibration during running during normal driving other than accidents and dangerous driving. Therefore, an unnecessary image is recorded on the CF card.

  On the other hand, in the present embodiment in which the applicable vehicle is a transport truck, the CPU 11 uses the sudden deceleration at the time of an accident or sudden braking to detect a sudden G and a constant G sensor output value. It is determined that the vehicle is in an accident or dangerous driving, and images are recorded on the CF card 2. Therefore, recording unnecessary images on the CF card 2 can be eliminated as much as possible, and the recording capacity of the CF card 2 can be secured.

FIG. 8 is a diagram for explaining a threshold determination method for the G sensor output value. CPU11 acquires the output of the G sensor 26, determines whether or not exceeding the threshold value _{G abe.} The G sensor 26 is a type of sensor that detects gravitational acceleration in three axial directions orthogonal to each other as described above, and is configured to be able to detect gravitational acceleration in the front-rear, left-right, and vertical directions of the vehicle. First, the axial direction for detecting the vertical gravitational acceleration is specified, and then the axial direction for detecting the longitudinal gravitational acceleration is specified. Thereafter, an axial direction for detecting the gravitational acceleration in the left-right direction is specified.

  Therefore, not only the longitudinal collision accident but also the lateral collision accident can be reliably detected, and the cause can be analyzed. The threshold determination is performed by the vector sum of the gravitational acceleration in the front-rear direction and the gravitational acceleration in the left-right direction. This threshold value can be changed to an arbitrary value by setting.

  FIG. 9 is a flowchart showing a procedure of processing (automatic determination i, ii) for automatically determining the two axes to be used and the direction from the G sensor 26. This will be described with reference to FIG. This process starts under the condition of shifting to the offset mode, for example, by operating the switch 10 when the drive recorder body 7 is powered on or during the operation of the drive recorder 1.

  After the start of this process, the process proceeds to step b1, and the CPU 11 checks each G sensor output value in the three axis directions. Next, in step b2, the CPU 11 discards the axis having the large G sensor output value, that is, the axis in the vertical direction in order to determine the G sensor output axes in the longitudinal direction and the lateral direction of the vehicle. Next, the process proceeds to step b3, offset adjustment is executed, and the CPU 11 determines the two axes to be used. The subroutine for executing this offset adjustment will be described in detail with reference to FIGS.

  Next, in step b4, the CPU 11 shifts from the offset mode to the normal operation mode. Next, in step b5, the CPU 11 checks the vehicle speed pulse via the vehicle speed sensor 33 in order to determine whether or not the speed of the vehicle is increasing, and temporarily stores it in the second SD-RAM 29, for example.

  Next, proceeding to step b6, the CPU 11 determines whether or not the vehicle speed has increased. When the determination is “NO”, the process returns to step b6. When it is determined that the vehicle speed has increased, the process proceeds to step b7, and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used. Each G sensor output value is temporarily stored in, for example, the second SD-RAM 29.

  Next, the process proceeds to step b8 (i), and the CPU 11 determines the direction in which the G sensor output value is largest as “−Y”. “−Y” is a direction opposite to the traveling direction. After step b7, the process may move to step b8 (ii). In step b8 (ii), the CPU 11 determines the direction in which the G sensor output value is the largest as “Y”, which is the traveling direction. After step b8 (i) or step b8 (ii), the process proceeds to step b9, and the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  FIG. 10 is a flowchart showing a procedure of processing (automatic determination iii) for automatically determining the two axes to be used and the direction from the G sensor 26. In this flowchart, steps having the same processing contents as those in the flowchart shown in FIG. 9 are given the same step numbers, and descriptions thereof are omitted. The start condition of this flowchart is the same as the start condition of the flowchart shown in FIG.

  As shown in FIG. 10, after step b4, the process proceeds to step b5 (iii). First, in order to determine the traveling direction or the opposite direction, the CPU 11 determines whether or not an accelerator (not shown) of the vehicle is on (ON). Judging. If it is determined as “NO”, the process returns to step b5 (iii). When it is determined that the accelerator is “ON”, the process proceeds to step b6 (iii), and the CPU 11 determines whether or not the gear of the transmission is reverse. When the determination is “NO”, the process proceeds to step b7 (iiib), and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used.

  Next, the process proceeds to step b8 (iiib), and the CPU 11 determines the direction in which the G sensor output value is largest as “−Y”. Next, proceeding to step b9 (iiib), the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  If it is determined in step b6 (iii) that the gear is reverse, the process proceeds to step b7 (iii), and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used. Next, the process proceeds to step b8 (iii), and the CPU 11 determines the direction in which the G sensor output value is the largest as “Y”. Next, proceeding to step b9 (iii), the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  FIG. 11 is a flowchart showing a procedure of processing (automatic determination iv) for automatically determining the two axes to be used and the direction from the G sensor 26. In this flowchart, steps having the same processing contents as those in the flowchart shown in FIG. 9 are given the same step numbers, and descriptions thereof are omitted. The start condition of this flowchart is the same as the start condition of the flowchart shown in FIG.

  After step b4, the process proceeds to step b5 (iv). First, in order to determine the traveling direction or the opposite direction, the CPU 11 determines whether or not the brake of the vehicle has been switched from "off" to "on". . Returning to step b5 (iv) upon determination of "No". When the brake is determined to be “on”, the process proceeds to step b6 (iv), and the CPU 11 determines whether or not the transmission gear is reverse. When the determination is “NO”, the process proceeds to step b7 (ivb), and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used.

  Next, the process proceeds to step b8 (ivb), and the CPU 11 determines “Y” as the direction in which the G sensor output value is the largest. Next, proceeding to step b9 (ivb), the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  If it is determined in step b6 (iv) that the gear is reverse, the process proceeds to step b7 (iva), and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used. Next, the process proceeds to step b8 (iva), and the CPU 11 determines the direction in which the G sensor output value is the largest as “−Y”. Next, proceeding to step b9 (iva), the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  FIG. 12 is a flowchart illustrating a procedure of processing (automatic determination v) for automatically determining the two axes to be used and the direction from the G sensor 26. In this flowchart, steps having the same processing contents as those in the flowchart shown in FIG. 9 are given the same step numbers, and descriptions thereof are omitted. The start condition of this flowchart is the same as the start condition of the flowchart shown in FIG.

  After step b4, the process proceeds to step b5 (v). First, the CPU 11 determines whether or not the exhaust brake has been switched from "off" to "on" in order to determine the traveling direction or the opposite direction. If the determination is “NO”, the process returns to step b5 (v). When the exhaust brake is determined to be “on”, the process proceeds to step a6 (v), and the CPU 11 checks the G sensor output values in the four horizontal directions of the two axes to be used. Next, the process proceeds to step b7 (v), and the CPU 11 determines “Y” as the direction in which the G sensor output value is the largest. Next, proceeding to step b8 (v), the CPU 11 determines the remaining three directions excluding the determined direction among the four horizontal directions. Thereafter, this process is terminated.

  FIGS. 13A and 13B are flowcharts showing a procedure of processing (automatic determination vi) for automatically determining the two axes to be used and the direction from the G sensor 26. This process starts under the condition that the power source of the drive recorder body 7 is activated. After the start of this process, the process proceeds to step c1, and the CPU 11 determines whether or not the offset mode is set. If it is determined as “No”, the process proceeds to Step c6. If it is determined that the offset mode is set, the process proceeds to step c2, and the CPU 11 checks the output values of the G sensors in the three-axis directions.

  Next, the process proceeds to step c3, and the axis having the large G sensor output value, that is, the axis in the vertical direction is discarded in order to determine the G sensor output axes in the longitudinal direction and the lateral direction of the vehicle. Next, the process proceeds to step c4, offset adjustment is executed, and the CPU 11 determines the two axes to be used. The subroutine for executing this offset adjustment will be described in detail with reference to FIGS.

  Next, the process proceeds to step c5, where the CPU 11 sets the direction check counter to “0”, sets the direction determination flag to “0”, and temporarily stores it in the second SD-RAM 29, for example. Next, the process proceeds to step c6 where the CPU 11 determines whether or not the direction determination flag is “0” in order to confirm whether or not the two axes to be used have been determined. The process ends when the determination is “NO”. If it is determined that the direction determination flag is “0”, the process proceeds to step c7, and the CPU 11 temporarily stores, for example, the second SD-RAM 29 in the second SD-RAM 29 in the direction in which the G sensor output value first increases among the four horizontal directions to be used. Remember.

  Next, the process proceeds to step c8, and the CPU 11 determines whether or not the direction check counter is “0” in order to determine whether or not the processes of steps c2 to c5 have been performed. If it is determined as “NO”, the process proceeds to step c11. When the direction check counter is determined to be “0”, the process proceeds to step c9, and the CPU 11 increments the direction check counter by “1”. Next, the process proceeds to step c10, and the CPU 11 backs up the counted direction check counter in, for example, the second SD-RAM 29. Thereafter, this process is terminated.

  In step c11, in order to count up the direction check counter in the matching direction, the CPU 11 determines whether or not the previously temporarily stored direction matches the currently temporarily stored direction. If “No”, that is, it is determined that the directions do not match, the process proceeds to step c17, and the CPU 11 sets the direction check counter to “1”. Next, the process proceeds to step c18, and the CPU 11 backs up the direction temporarily stored this time, for example, in the second SD-RAM 29.

  If it is determined in step c11 that the direction coincides, the process proceeds to step c12, and the CPU 11 increments the direction check counter by “1”. In step c13, the CPU 11 determines whether or not the direction check counter is “5” in order to increase the accuracy of the determined direction. The count number determined in this step is not limited to “5”, and a natural number is sufficient. If it is determined as “NO” in step c13, that is, if the direction check counter is not “5”, the process is terminated. When the direction check counter is determined to be “5” in step c13, the process proceeds to step c14, and the CPU 11 determines “−Y” as the direction in which the G sensor output value is the largest.

  Next, proceeding to step c15, the CPU 11 determines the remaining three directions of the four horizontal directions excluding the determined direction. Next, proceeding to step c16, the CPU 11 sets the direction determination flag to “1” and stores it in the second SD-RAM 29, for example. Thereafter, this process is terminated.

  According to the drive recorder 1 described above, the CPU 11 controls to record driving information and the like on the CF card 2. In particular, as the recording start condition, an output value of at least one of the longitudinal acceleration, the lateral acceleration, and the vertical acceleration of the vehicle detected by the G sensor 26 is applied. Therefore, unlike the prior art, the drive recorder 1 does not need to set the drive recorder body in a horizontal posture and specify the orientation of the drive recorder body with respect to the vehicle. Therefore, the drive recorder main body 7 can be quickly attached to the vehicle as compared with the prior art, and the degree of freedom of attachment can be increased. Therefore, it is possible to realize a drive recorder that can reduce the work man-hours as much as possible.

  FIG. 14 is a flowchart showing a procedure of processing for correcting the offset of the G sensor 26 by the switch 10. This process starts under the condition that the ACC signal supplied from the accessory power supply is turned on. After the start of this process, the process proceeds to step f1.

  In step f1, the CPU 11 determines whether or not the command information is given from the switch 10. If it is determined that the command information is given, the process proceeds to step f2, and if it is not given, the process proceeds to step f3. The command information is information representing an operation command for writing operation information stored in the RAM 13 to the CF card 2. In step f2, since the command information is given, the CPU 11 controls each part so that the operation information stored in the RAM 13 is written in the CF card 2, and returns to step f1.

  In step f3, the CPU 11 determines whether or not specific information has been given from the switch 10. If it is determined that the specific information has been given, the CPU 11 proceeds to step f4, and if not, returns to step f1. The specific information is information indicating that the front-rear and left-right offsets of the G sensor 26 are corrected. In step f4, since the specific information is given, the CPU 11 corrects the front-rear and left-right offsets of the G sensor 26 as described above, and returns to step f1.

  According to the drive recorder 1 according to the present embodiment described above, a plurality of driving information, specifically images, G sensor output values, positions, times, vehicle speeds, voices, and the like are circulated and recorded in the second SD-RAM 29. To do. As described above, the image, the G sensor output value, the position, the time, the vehicle speed, and the sound are recorded on the CF card 2 based on the G sensor 26 and the trigger such as the vehicle speed.

  When the CPU 11 determines that the command information is specific information, the CPU 11 corrects the offset of the G sensor 26. In other words, the initial value of the G sensor 26 is set. Therefore, the switch 10 is originally a switching means for inputting command information for instructing a writing operation. However, if the command information input by the switch 10 is specific information, the initial value of the G sensor 26 is set as described above. Is set. Accordingly, the initial value of the G sensor 26 can be set using the switch 10. Therefore, in order to simplify the configuration of the drive recorder 1, the LCD controller 27 is connected to the LCD operator connector 21 without providing a dedicated means for setting the initial value of the G sensor 26. The offset correction can be easily set using the switch 10 without shifting to the maintenance mode for setting and inspecting the main body 7. This improves convenience.

  Next, a drive recorder 1A according to a second embodiment of the present invention will be described with reference to FIG. FIG. 15 is a perspective view of a drive recorder 1A according to the second embodiment of the present invention. FIG. 16 is a front view showing the drive recorder 1A. The drive recorder 1A according to the present embodiment is characterized in that it further includes a memory switch 60 as input means and a power switch 61 as power supply means. In the drive recorder 1 according to the first embodiment described above, the power supply unit 25 is configured to start up based on, for example, a power supply start signal, but the drive recorder 1A according to the second embodiment of the present invention. Then, by operating the power switch 61, power-on information is given to the CPU 11. The CPU 11 is configured to start up the power supply unit 25 based on power-on information that is startup information from the power switch 61. The power switch 61 is electrically connected to the CPU 11. The power switch 61 can input power-on information for starting the drive recorder 1A.

  The CPU 11 has a function as a determination unit, and determines whether command information input by the memory switch 60 and power-on information input by the power switch 61 are input simultaneously. The command information is information given by operating the memory switch 60 as described above, as described above, and is information based on a predetermined number of times, for example, one operation within a predetermined time, for example, 1 second. It is. The power-on information is information given by operating the power switch 61 as described above, as described above, and is based on a predetermined number of times, for example, once during a predetermined time, for example, 1 second. Information.

  When the CPU 11 has a function as setting means and determines that the command information given from the memory switch 60 and the power-on information given from the power switch 61 are input simultaneously, the CPU 11 is the same as in the first embodiment. In addition, the value detected by the G sensor 26 is set to a predetermined initial value. Here, “simultaneous” is not limited to the case where each piece of information is given completely at the same time, but it is sufficient that at least one period of the period during which command information is given to the CPU 11 and the period during which power-on information is given overlap.

  FIG. 17 is a flowchart showing a procedure of processing for correcting the offset of the G sensor 26 by the memory switch 60 and the power switch 61. This process starts under the condition that the ACC signal supplied from the accessory power supply is turned on. After this processing starts, the process proceeds to step g1.

  In step g1, the CPU 11 determines whether or not command information has been given from the memory switch 60. If it is determined that the command information has been given, the process proceeds to step g2, and if it is not given, the process proceeds to step g4.

  In step g2, the CPU 11 determines whether or not the power-on information is given from the power switch 61 during the period when the command information is given. If given, the process proceeds to step g3. Shifts to step g6.

  In step g6, since only the command information is given, the CPU 11 controls each unit to write the operation information stored in the RAM 13 to the CF card 2, and returns to step g1. In step g3, since the command information and the power-on information are simultaneously given, the CPU 11 corrects the longitudinal and lateral offsets of the G sensor 26 as described above, and returns to step g1.

  In step g4, the CPU 11 determines whether or not the power-on information is given from the power switch 61. If it is judged that the power-on information is given, the CPU 11 proceeds to step g5. In step g5, since only the power-on information is given, the power supply unit 25 is started and the process returns to step g1.

  According to the drive recorder 1A according to the second embodiment of the present invention described above, the CPU 11 determines that the command information given from the memory switch 60 and the power-on information given from the power switch 61 are input simultaneously. The value detected by the G sensor 26 is set to a predetermined initial value. The memory switch 60 is originally a switching means for inputting command information for instructing a writing operation, and the power switch 61 is originally a means for inputting power-on information for starting the drive recorder 1 (1A). When the information input by the switches 60 and 61 is input simultaneously, the initial value of the G sensor 26 is set as described above. Since these switches 60 and 61 are not input simultaneously in a normal operation, the initial value of the G sensor 26 can be set by such a special operation.

  Therefore, in order to simplify the configuration of the drive recorder 1A, a dedicated means for setting the initial value of the G sensor 26 is not provided, and the LCD operating unit 27 is connected to the LCD operating unit connector 21 so as to drive the drive recorder. The offset correction can be easily set using the memory switch 60 and the power switch 61 without shifting to the maintenance mode for setting and inspecting the main body 7. This improves convenience.

  Next, a drive recorder 1B according to the third embodiment of the present invention will be described. Drive recorder 1B is realized by the remaining configuration excluding the configuration related to GPS from drive recorder 1 according to the first embodiment described above. The position information and the time information can be acquired by the configuration related to GPS. However, if these configurations are not available, the driver needs to set the time information. In the third embodiment of the present invention, the memory switch 60 is capable of inputting command information for instructing an operation to write operation information stored in the RAM 13 to the CF card 2, and performing a predetermined operation. The time counted by the CPU 11 can be corrected.

  CPU11 has a function as a time measuring means, and is measuring time. Therefore, the image capturing time and the like are determined based on the time information timed by the CPU 11. The CPU 11 has a function as a determination unit, and determines whether or not the command information input by the memory switch 60 is predetermined specific information. The command information is information given by operating the memory switch 60 by a normal switch, and is information based on a predetermined number of times, for example, one operation within a predetermined time, for example, 1 second. The specific information is information given by operating the memory switch 60 as a special switch that is not normal, and is information based on a predetermined number of times, for example, twice during a predetermined time, for example, 1 second. is there. For example, the specific information is information based on the operation of the memory switch 60 continuously for a predetermined time, for example, 5 seconds. Therefore, the CPU 11 can determine whether or not the command information given from the memory switch 60 is specific information.

  Further, the CPU 11 has a function as setting means, and when the command information given from the memory switch 60 is determined to be the specific information, the CPU 11 sets the time counted by the CPU 11 to a predetermined time. Therefore, the time is corrected by specially operating the memory switch 60 as described above. For example, if the above-mentioned specific information is given to the CPU 11 during a period from (T-1) 30 minutes to T hours 29 minutes (T is an integer from 0 to 23), the current time is set to T 00 It is configured to set the minute 00 seconds. In this case, for example, when the current time is 11:38, the current time is set to 12:00:00 by inputting specific information through the memory switch 60.

  Also, for example, if the above-mentioned specific information is given to the CPU 11 during the period from (T-1) time 45 minutes to T time 14 minutes, the current time is set to T hours 00 minutes 00 seconds and the current time is If the above-mentioned specific information is given to the CPU 11 during a period from T: 15 to T: 44, the current time may be set to T: 30: 00. In this case, for example, when the current time is 11:38, the specific time is input by the memory switch 60, so that the current time is set to 11:30:30. Further, for example, when the current time is 12:02, the current time is set to 12:00:00 by inputting specific information through the memory switch 60.

  FIG. 18 is a flowchart illustrating a procedure of processing for correcting time by the memory switch 60. This process starts under the condition that the ACC signal supplied from the accessory power supply is turned on. After the start of this process, the process proceeds to step h1.

  In step h1, the CPU 11 determines whether or not command information is given from the memory switch 60. If given, the process proceeds to step h2, and if not, the process proceeds to step h3. In step h2, since the command information is given, the CPU 11 controls each part so that the operation information stored in the RAM 13 is written in the CF card 2, and returns to step h1.

  In step h3, the CPU 11 determines whether or not specific information has been given from the memory switch 60. If it is determined that the specific information has been given, the process proceeds to step h4, and if it is not given, the process returns to step h1. In step h4, since the specific information is given, the CPU 11 corrects the time as described above, and returns to step h1.

  According to the drive recorder 1B according to the third embodiment of the present invention described above, when the CPU 11 determines that the command information is specific information, the CPU 11 corrects the time. The memory switch 60 is originally a means for inputting command information for instructing a writing operation. If the command information input by the memory switch 60 is specific information, the current time is set to a predetermined time as described above. Is set. As a result, the current time can be set using the memory switch 60.

  Therefore, in order to simplify the configuration of the drive recorder 1B, a dedicated switch means for setting the time is provided even if there is no configuration related to GPS and there is no function for automatically correcting the current time. The time is easily set using the memory switch 60 without connecting the LCD controller 27 to the LCD controller connector 21 and shifting to the maintenance mode for setting and inspecting the drive recorder main body 7. be able to. This improves convenience.

  Next, a drive recorder according to the fourth embodiment of the present invention will be described. The present embodiment is similar to the drive recorder 1A according to the second embodiment, and is characterized in that a power switch 61 is further provided.

  The CPU 11 has a function as a determination unit, and determines whether command information input by the memory switch 60 and power-on information input by the power switch 61 are input simultaneously. The command information is information given by operating the memory switch 60 as described above, as described above, and is information based on a predetermined number of times, for example, one operation within a predetermined time, for example, 1 second. It is. The power-on information is information given by operating the power switch 61 as described above, as described above, and is based on a predetermined number of times, for example, once during a predetermined time, for example, 1 second. Information.

  Further, the CPU 11 has a function as a setting means, and when it is determined that the command information given from the memory switch 60 and the power-on information given from the power switch 61 are inputted simultaneously, the same as in the third embodiment. In addition, the time measured by the CPU 11 is set to a predetermined time.

  FIG. 19 is a flowchart showing a procedure of processing for correcting time by the memory switch 60 and the power switch 61. This process starts under the condition that the ACC signal supplied from the accessory power supply is turned on. After the start of this process, the process proceeds to step i1.

  In step i1, the CPU 11 determines whether or not the command information is given from the memory switch 60. If it is determined that the command information is given, the process proceeds to step i2, and if it is not given, the process proceeds to step i4. In step i2, it is determined whether or not the power-on information is given from the power switch 61 during the period when the command information is given. If it is given, the process proceeds to step i3. If not given, step i6 is given. Migrate to

  In step i6, since only the command information is given, each part is controlled so that the operation information stored in the RAM 13 is written in the CF card 2, and the process returns to step i1. In step i3, since the command information and the power-on information are simultaneously given, the time is corrected as described above, and the process returns to step i1.

  In step i4, it is determined whether or not the power-on information is given from the power switch 61. If it is given, the process proceeds to step i5, and if not, the process returns to step i1. In step i5, since only the power-on information is given, the power supply unit is started and the process returns to step i1.

  According to the drive recorder according to the fourth embodiment of the present invention described above, when the CPU 11 determines that the command information given from the memory switch 60 and the power-on information given from the power switch 61 are simultaneously input, The time measured by the CPU 11 is set to a predetermined time. The memory switch 60 is originally a means for inputting command information for instructing a writing operation, and the power switch 61 is originally a means for inputting power-on information for starting the drive recorder. When the information input by is simultaneously input, the time to be timed is set to a predetermined time as described above. Since these switches 60 and 61 are not input simultaneously in a normal operation, the time can be set to a predetermined time by such a special operation.

  Therefore, in order to simplify the configuration of the drive recorder, a dedicated switch means for setting the time is provided even when there is no GPS-related configuration and there is no function for automatically correcting the current time. The time can be easily set using the memory switch 60 and the power switch 61 without connecting the LCD controller 27 to the LCD controller connector 21 and shifting to the maintenance mode for setting and inspecting the drive recorder body 7. Can be set to This improves convenience.

  Next, a drive recorder according to a fifth embodiment of the present invention will be described. The drive recorder according to the fifth embodiment of the present invention is similar to the drive recorder 1B described above, and is realized by the remaining configuration excluding the configuration related to GPS. As described above, the drive recorder according to the present embodiment has data even when the ACC signal is off and the second power supply unit of the operation management control device mounted in advance at the vehicle speed is off (falling signal). Termination is controlled by software so that recording can be performed. In this end control, the CPU 11 controls to record the time when the ACC signal is turned off (hereinafter sometimes referred to as “off time”) on the CF card 2.

  The center device is configured to be able to analyze and output information recorded on the CF card 2. When the center device reads the information recorded on the CF card 2 by the CF card reader 4 as a reading means in order to analyze the information recorded on the CF card 2, the latest off-stored information stored in the CF card 2 is displayed. The time is compared with the current time measured by the center device. As a result of this comparison, when a predetermined time, for example, 24 hours has elapsed since the off time, the center device notifies the display 5 that the predetermined time has elapsed. The display 5 displays, for example, a sentence “Please check whether the time setting of the in-vehicle device set in the vehicle number * is correct”. However, the “*” is an integer.

  Next, the operation of the drive recorder according to the fifth embodiment of the present invention will be described using a flowchart. FIG. 20 is a flowchart showing a procedure of processing for recording the off time. This process starts under the condition that the ACC signal supplied from the accessory power supply is turned on. After the start of this process, the process proceeds to step j1.

  In step j1, the CPU 11 determines whether or not the ACC signal is turned off. If turned off, the CPU 11 proceeds to step j2, and if not turned off, repeats step j1. In step j2. Since the ACC signal is turned off, the CPU 11 controls to write the off time when the ACC signal is turned off to the CF card 2 and returns to step j1. By processing in this way, the time when the ACC signal is turned off is written in the CF card 2.

  FIG. 21 is a flowchart illustrating a procedure of processing for prompting time correction. This will be described with reference to FIG. This process is executed by the calculation means of the PC 3 of the center device. This processing is started when the PC main body is turned on. After the start of this process, the process proceeds to step k1.

  In step k1, the calculation means determines whether or not the CF card 2 has been inserted into the CF card reader 4. If it is determined that the CF card 2 has been inserted, the operation proceeds to step k2, and if it has not been inserted, returns to step k1.

  In step k2, the calculation means reads the latest off time recorded on the CF card 2 and proceeds to step k3. In step k3, the calculation means compares the current time measured by the center device with the latest off time, and if a predetermined time, for example, 24 hours has elapsed from the off time, the arithmetic means shifts to step k4. If not, the process returns to step k1. In step k4, it is notified that a predetermined time has elapsed from the off time, and the process returns to step k1. By processing in this way, the operator of the center device can recognize that a predetermined time has elapsed since the latest OFF time recorded on the CF card 2.

  According to the drive recorder according to the fifth embodiment of the present invention described above, the CPU 11 records on the CF card 2 the off time when the ACC signal is turned off. Accordingly, in order to simplify the configuration of the drive recorder according to the fifth embodiment of the present invention, even if there is no means for notifying the time being measured by the drive recorder of the present embodiment, the driver Can check the time that the drive recorder is timing based on the off time recorded on the CF card.

  Further, the center device notifies that the time measured by the center device has elapsed from the latest off time recorded in the CF card 2 when a predetermined time has elapsed. When the time to stop the vehicle is constant to some extent, the off time when the ACC signal is turned off is constant to some extent, and the time for the CF card 2 to be read by the center device is often constant. In addition, by comparing the off time and the current time as described above, it can be recognized that the time counted by the drive recorder of the fifth embodiment is deviated from the current time.

  Therefore, in order to simplify the configuration of the drive recorder according to the fifth embodiment of the present invention, even if there is no configuration related to GPS and there is no function to automatically correct the current time, Since the shift can be automatically recognized, the driver can be prompted to correct the time based on such a time shift. This improves convenience.

  In the first to fourth embodiments described above, either one of the G sensor offset correction and the time correction is realized by the memory switch 60. However, the correction is not limited to one of the two corrections. You may comprise so that it can do. For example, by setting the specific information for offset correction and the specific information for time correction to be different from each other, the two corrections can be corrected by one memory switch 60.

  In addition, when specific information is input by the memory switch 60 and the power switch 61, it is preferable that the light emission mode of the light emitting diodes is individually changed so that the driver can recognize that the specific information has been input. . Thus, the driver can recognize whether or not the specific information has been input by the light emitting mode of the light emitting diode, and can prevent erroneous operation. In addition, the present invention can be implemented in various forms without departing from the spirit of the present invention.

It is a figure which shows an example of a structure of center apparatus. 1 is a perspective view showing a drive recorder 1. FIG. 2 is a block diagram showing an electrical configuration of the drive recorder 1. FIG. It is a figure which shows the aspect by which still image information is recorded on the CF card 2 at fixed intervals (delta) based on the G sensor output value 31 and the speed change 32. FIG. It is a figure which shows the relationship between a part of image information, position information, etc. It is a flowchart which shows the process sequence of CPU11 regarding switching of acquisition of vehicle speed information. 6 is a diagram illustrating a relationship between a G sensor output value 31 that exceeds a threshold value and a recording range Rh of image information recorded on the CF card 2. FIG. It is a figure for demonstrating the threshold value determination method of G sensor output value. It is a flowchart which shows the procedure of the process (automatic determination i, ii) which determines automatically the 2 axes and direction to be used from G sensor 26. It is a flowchart which shows the procedure of the process (automatic determination iii) which determines automatically the 2 axes and direction to be used from G sensor 26. It is a flowchart which shows the procedure of the process (automatic determination iv) which determines automatically the two axes and direction to be used from G sensor 26. It is a flowchart which shows the procedure of the process (automatic determination v) which determines automatically the 2 axis and direction to be used from G sensor 26. FIG. It is a flowchart which shows the procedure of the process (automatic determination vi) which determines automatically the 2 axes and direction to be used from G sensor 26. It is a flowchart which shows the procedure of the process (automatic determination vi) which determines automatically the 2 axes and direction to be used from G sensor 26. 4 is a flowchart showing a procedure of processing for correcting an offset of a G sensor by a switch. It is a perspective view of drive recorder 1A concerning a 2nd embodiment of the present invention. It is a front view showing drive recorder 1A. 5 is a flowchart showing a procedure of processing for correcting an offset of the G sensor by a memory switch and a power switch. 4 is a flowchart showing a procedure of processing for correcting time by the memory switch 60. 5 is a flowchart showing a procedure of processing for correcting time by a memory switch 60 and a power switch 61. It is a flowchart which shows the procedure of the process which records off time.

It is a flowchart which shows the procedure of the process which accelerate | urge | promotes time correction.

Explanation of symbols

1, 1A, 1B Drive recorder 2 Compact flash (abbreviation: CF) card 11 CPU
33 Vehicle speed sensor 40 GPS receiver 41 GPS antenna

Claims (4)

The driving information recording device that records driving information relating to the operation including the traveling speed of the vehicle,
Receiving means for receiving a plurality of radio signals;
Based on the radio signal received by said receiving means, a vehicle speed measuring means for measuring the traveling speed of the vehicle,
Pulse detection means for detecting vehicle speed pulses;
Based on the detected vehicle speed pulse by the pulse detection unit, vehicle speed detecting means for detecting a traveling speed of the vehicle,
If the running speed measured by the vehicle speed measuring means is equal to or higher than a predetermined speed, the vehicle speed detection mode for detecting the traveling speed of the vehicle by said vehicle speed detecting means, a vehicle speed measuring the traveling speed of the vehicle is Ru is measured by the vehicle speed measuring means and switching means for switching to the mode,
A driving information recording apparatus comprising: In the vehicle speed measurement mode , the switching means is the vehicle speed detection means when the pulse signal detection means does not detect a vehicle speed pulse signal and the traveling speed measured by the vehicle speed measurement means is equal to or higher than a predetermined speed. a vehicle speed from the detection mode, driving information recording apparatus according to claim 1, wherein the switching to the vehicle speed measurement mode in which the running speed of the vehicle is measured by the vehicle speed measuring means for detecting the traveling speed of the vehicle by. Said switching means, when the traveling speed measured by the vehicle speed measuring means is less than a predetermined speed, according to claim 1, characterized that you sure vehicle speed pulses detected by the pulse signal detecting means or 2. The driving information recording device according to 2. The driving information recording apparatus that records an including OPERATION information the running speed of the vehicle,
Based on a plurality of radio signals received by the receiving means, a vehicle speed measuring means for measuring the traveling speed of the vehicle,
Based on the detected vehicle speed pulse by pulse detection means, vehicle speed detecting means for detecting a traveling speed of the vehicle,
Vehicle speed measurement in which the vehicle speed measurement means measures the vehicle travel speed from the vehicle speed detection mode in which the vehicle speed detection means detects the vehicle travel speed when the travel speed measured by the vehicle speed measurement means is greater than or equal to a predetermined speed. Switching means for switching to the mode;
Driving information recording apparatus comprising: a.

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