JP7403199B2 - Traffic management system - Google Patents

Description

The present invention relates to a traffic management system having a function of displaying recorded operation information when an event such as a dangerous situation or an accident occurs during the operation of a vehicle.

Conventionally, drive recorders have been used to detect the occurrence of dangerous situations such as sudden braking or sudden steering, or accidents such as rear-end collisions based on driving data from acceleration sensors and speedometers installed in the vehicle. A traffic management system is used that records and displays operation information, including location information and image information captured by an on-vehicle camera, for a predetermined period before and after an event occurs. Normally, when a predetermined value of travel data exceeds a predetermined threshold value, it is determined that an event has occurred, and the aforementioned operation information record data is retained, and then operation information related to the event is displayed. is being carried out.

Patent Document 1 discloses that a predetermined threshold value of driving data, etc., which is the basis for determining that the event has occurred, is displayed at the same time as image information taken at the time of the event occurrence, and furthermore, a setting for changing the threshold value is disclosed. A method is described in which a change screen is displayed and threshold settings can be changed on that screen. This makes it possible to optimally set the conditions for an event for which an image should be recorded.

Patent Document 2 discloses that after detecting the occurrence of an event, it is monitored to see if a specific vehicle state such as that usually occurs due to an accident occurs, and if the vehicle state does not occur, the occurrence of the event is invalid. This document describes a method for lowering the priority of retaining recorded data by adding information indicating this to image information. This prevents important image data from being erased due to event information being overwritten in the memory due to malfunction determination, and furthermore makes it possible to easily identify important image data.

Patent No. 4859756 Japanese Patent Application Publication No. 2012-3607

If the driving data threshold, which is the standard for determining the occurrence of an event, is inappropriately set, it may occur in normal vehicle driving that is not worthy of attention, mixed in with important events related to accidents etc. Operation information under such driving conditions will be recorded and displayed as an event, resulting in a problem that attention to important events will be reduced.

Additionally, when driving on a road, depending on the shape of the road and surrounding conditions, there are places where it is easy to brake suddenly or accelerate suddenly, and an event may occur at such a specific point. There may be cases where it is determined that this occurs frequently. It is desirable to exclude operation information in a driving state that is unrelated to such an accident and is not determined to be important from being displayed as an event.

In the method described in Patent Document 1, if unimportant events occur frequently at the same point, the threshold value must be reset each time an event occurs, which is time-consuming, and the method requires setting the threshold value by specifying the point. Therefore, all points must be judged using the same threshold value, and there are problems such as the inability to respond to the unique situation of each point.

The method described in Patent Document 2 requires complicated processing because whenever an event occurs, it is necessary to monitor the subsequent state and add invalidation information. Similarly, it is not possible to specify a point and set a threshold for the occurrence of an event.

As described above, in conventional traffic management systems, the determination of the occurrence of an event is almost uniquely made and displayed in common at all points, so even if there is a situation unique to that point, past driving experience and It has not been easy to add the driver's subjective judgment based on driving history, etc.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a traffic management system that can exclude from display target traffic information at a specific point that should not be determined as an event occurrence. Our goal is to provide the following.

In a first aspect, the present invention provides a first determination means for determining the time point at which a predetermined event occurs using operation information that is information regarding the operation of the vehicle including information regarding the recorded position of the vehicle; and an event display means for displaying the operation information at the time when the event occurs, and when the vehicle runs at a selected specific point, the event occurring at the specific point is selected from the display target of the event display means. To provide a traffic management system characterized by having a cancellation function to exclude.

Therefore, for example, even if the operation information when traveling at a selected specific point corresponds to the time when an event occurs, the operation information at that time will not be displayed. If the cancellation function of the present invention is used, the driver can, for example, consider the road conditions at that point, the type of vehicle, past driving information, his or her own past driving experience, etc., and determine whether that point should be displayed as an event occurrence point. It becomes possible to add a judgment as to whether or not. Note that the operation information at the time of occurrence of the event is operation information for a predetermined period including at least the time of occurrence of the event, and the operation information includes, for example, driving data such as acceleration and speed, and image information captured by an on-board camera. It may also include.

In a second aspect, the present invention provides the traffic management system according to the first aspect, further comprising a second determining means for determining the point of occurrence of a predetermined abnormal state using the traffic information, and When the determination means determines that the abnormal state has occurred, the operation information at the time when the abnormal state occurs is updated to the It is characterized in that it is a display target of an event display means. Even at the above-described specific point, if an important event such as an accident actually occurs, it is necessary to determine the occurrence of the event, and event display is required. In the invention of this aspect, the determination can be made by providing a second determination means different from the first determination means.

In a third aspect, the present invention provides the traffic management system according to the first or second aspect, further comprising point registration means for registering the specific point, and the point registration means allows The present invention is characterized in that the specific point can be registered. The specific point can be controlled to be set based on the number of times an event unrelated to an accident has occurred, but in the present aspect of the invention, the specific point can be registered in advance. It is something.

For example, the driver can set the location in advance by considering the road conditions at that location, the type of vehicle, past driving information, his or her own past driving experience, etc. Further, for example, it is possible to configure the system so that not only the driver but also the operation manager can register the location in advance based on the vehicle type, driver, number of past events, etc.

In a fourth aspect, the present invention provides the traffic management system according to any one of the first to third aspects, in which the specific point is set as a range including a road, and the specific point is set as a range including a road, and The present invention is characterized in that information regarding the position is obtained based on data, and based on the information regarding the position, it is determined whether the vehicle is at the specific point.

In the invention of this aspect, the range of the specific point is set on the road, and for example, if the specific point is a curve or an intersection on the road, it is not possible to determine whether the vehicle is within that range or not. , the determination is made based on the set range and data from position detection means such as GPS mounted on the vehicle. In this way, if the range of a specific point is set in advance to the range of nearby roads where there is a possibility that an event may occur, it is possible to determine that the point is the same even if the location is slightly shifted.

In a fifth aspect, in the traffic management system according to any one of the first to fourth aspects, the present invention makes it possible to use the cancellation function depending on the traveling direction of the vehicle at the specific point. It is characterized by determining whether or not. Normally, the driving condition of a vehicle on a road varies depending on the direction of travel of the vehicle. For example, even at an intersection on the same road, the possibility of an event occurring depends on the direction of travel of the vehicle, such as turning left, turning right, or going straight. do. Therefore, in the present aspect of the invention, it is determined whether the cancel function can be used depending on the traveling direction of the vehicle.

In a sixth aspect, the present invention provides the traffic management system according to any one of the second to fifth aspects, wherein the second determining means determines that the traffic information has a predetermined pattern indicating the occurrence of the predetermined abnormal state. The feature is that the determination is made based on whether or not it is similar to. In the present aspect of the invention, for example, acceleration data can be used to determine whether the operation information is similar to a predetermined pattern.

For example, this can be done by comparing a combination of amplitude and frequency components in three mutually orthogonal coordinate axes of acceleration, or by comparing these data and velocity data with a preset data pattern. This makes it possible to perform appropriate determination processing. In addition, by using the cancellation function at the specific point mentioned above and making the determination by this second determination means while the vehicle is running, it is possible to determine the occurrence of an event appropriately each time, and the information to be recorded is capacity can be reduced.

In a seventh aspect, the present invention provides the traffic management system according to any one of the first to sixth aspects, wherein the traffic information is traffic information continuously acquired at predetermined time intervals while the vehicle is in operation. After the operation, it is possible to set or change the judgment conditions in the first judgment means and to select whether or not to use the cancellation function at the specific point.

In the invention according to this aspect, for example, after driving, the driver of the vehicle can determine whether or not an accident has occurred and the degree of risk of the actual driving by setting a threshold value for the occurrence of an event in the first determination means. Taking this into account, it becomes possible to more appropriately determine the time point at which an event occurs. Furthermore, after the trip, it is possible to decide whether or not to use the cancellation function and to select the event to be displayed.

Specifically, for example, the onboard equipment continuously acquires operation information at predetermined time intervals and stores it in a storage device such as a memory card, and after operation, the memory card is read into a personal computer and the above judgment process is performed. You can set whether to show or hide. In this case, instead of the personal computer, the above processes and settings may be performed using a navigation device or a drive recorder main body to which a display device can be connected or built-in. In addition, since all operation information during operation is saved until after operation, operation information that should be considered as an event occurrence will not be inappropriately deleted.

In an eighth aspect, the present invention provides a traffic management system according to any one of the first to seventh aspects, comprising a map display means for displaying map information and a map, and the event display means is configured to It has a function of displaying a point and the specific point on a map, and has a selection function on the display screen to select whether or not to use the cancel function at the specific point. do. In this aspect of the invention, by displaying the event occurrence point and the specific point on a map, these points can be easily understood. Furthermore, since it is possible to select whether or not to use the cancel function at a specific point on the display screen, the procedure for excluding an event from display objects is simplified.

According to a ninth aspect, the present invention provides the traffic management system according to the eighth aspect, wherein the event display means has a function of displaying the type of the event and the level of the event. By displaying the event location on the map and the level of the event, such as its type and degree of risk, you can understand the event more specifically and decide whether or not to use the cancel function at a specific location. It can be done better. For example, the type of event includes acceleration exceeding a predetermined value or the occurrence of sudden deceleration, and the level of the event includes the rate of acceleration or speed change exceeding a predetermined value.

In a tenth aspect, the present invention provides the traffic management system according to the eighth or ninth aspect, wherein the event display means has a function of displaying the number of occurrences of the event at a point where the event occurs in a predetermined period. It is characterized by having the following. In the invention of this aspect, since the operation information and the number of occurrences of the event can be displayed in relation to the point where the event occurs, it is possible to easily grasp the point where the event is likely to occur. Thereby, for example, it is possible to select whether or not to use the cancel function at the specific point, taking into account the content of the event and the number of occurrences. In addition to using numbers, the number of occurrences can also be expressed using symbols or different colors.

According to an eleventh aspect, the present invention provides the traffic management system according to the tenth aspect, wherein the event display means includes information on the type of the event and the occurrence of each type of the event at a point where the event occurs in a predetermined period. It is characterized by having a function to display the number of times. It displays not only the total number of events, but also the number of times each event occurs. As a result, when a plurality of types of events occur at the same point, it is possible to easily understand which events are likely to occur, and it is possible to more appropriately select whether or not to use the cancel function.

According to a twelfth aspect, the present invention provides the traffic management system according to any one of the eighth to eleventh aspects, wherein the event display means is configured to control the operation of the traffic management system related to the event displayed at the event occurrence point on the map. It is characterized by having a function of displaying information in the form of a table.
By displaying the operation information of events that occurred at points on the map in the form of a table, it becomes easier to see the operation information related to the event, and more information can be displayed, so use the cancellation function. It is possible to appropriately select whether or not to do so.

According to a thirteenth aspect, the present invention is the traffic management system according to the twelfth aspect, characterized in that the table is displayed as a different table depending on the traveling direction of the vehicle at the time when the event occurs. As mentioned above, the probability of an event occurring depends on the direction of travel of the vehicle even at the same point, so by displaying the table that displays event operation information as a different table depending on the direction of travel of the vehicle, we can draw attention to it. Information on events in the direction of travel can be easily grasped.

In a fourteenth aspect, the present invention provides a program for causing a computer to function as an operation management system according to any one of the first to fourteenth aspects.

As described above, according to the present invention, it is possible to obtain a traffic management system that can exclude from display targets traffic information at a specific point that should not be determined as an event occurrence.

1 is a diagram showing a schematic configuration of a traffic management system according to a first embodiment. The figure which shows an example of the procedure when determining the event at a specific point. FIG. 3 is a diagram conceptually showing a data structure of contents recorded on a memory card. FIG. 3 is a diagram illustrating a state of acceleration change when an event occurs and a storage period of operation information. The figure which shows the acceleration change in the case of a sudden steering wheel. FIG. 3 is a diagram showing changes in acceleration in the case of a vehicle collision. It is a figure showing a display example of an event display screen, and is a screen before events at a specific point are excluded from display targets. It is a figure which shows the example of a display of an event display screen, and is an operation screen which excludes the event of a specific point from a display target. It is a figure which shows the example of a display of an event display screen, and is a screen after excluding the event of a specific point from a display target. FIG. 2 is a diagram showing a schematic configuration of a traffic management system according to a second embodiment. A map screen showing an example of a display screen. A map screen showing an example of a display screen.

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the drawings. The present invention is not limited thereby. In addition, in the description of the drawings, the same elements are given the same reference numerals, and duplicate description thereof will be omitted.

FIG. 1 is a diagram showing a schematic configuration of a traffic management system according to a first embodiment. As shown in FIG. 1, the operation management system of this embodiment includes a drive recorder 10 installed in a vehicle, a memory card 25 that stores operation information when an event occurs in the drive recorder 10, and a memory card 25 that stores operation information when an event occurs in the drive recorder 10. and a traffic management device 30 for displaying and managing traffic information.

The drive recorder 10 includes a first control section 11, an acceleration sensor (G sensor) 12, a gyro sensor 13, an atmospheric pressure sensor 14, a GPS antenna 15, and a GPS system that measures the GPS position information of the vehicle from the GPS signal received by the GPS antenna 15. (Global Positioning System) A receiver 16, a first operation unit 17 including switches, buttons, etc., a first memory 18 for temporarily storing images, and a slot for inserting a memory card 25. a first IF (interface) 19 for writing information, etc., a CCD camera 20 installed in the vehicle to continuously capture images in front of the vehicle at a predetermined rate, a vehicle signal acquisition unit 21, and a drive recorder. It has a power supply unit 22 and the like for supplying power to each of the 10 elements.

Further, the drive recorder 10 may be configured to cooperate with a navigation device (not shown) so that images can be reproduced on the display of the navigation device. Furthermore, although the GPS receiver 16 is not necessarily an essential component, it may be configured to acquire position information received by an external device, such as an AVM (Automatic Vehicle Monitoring) system or a navigation device.

The first control unit 11 is composed of a microcomputer or the like including a CPU, a storage device such as a ROM, and a RAM, and controls the entire operation of the drive recorder 10. Further, the first control unit 11 uses operation information including position information obtained from a GPS signal, travel data obtained from the various sensors and vehicle signals described above, and image information obtained from a CCD camera to determine when a predetermined event occurs. It has a first determining section 26 which is a first determining means for determining. This first determination section 26 is configured as a part of the aforementioned microcomputer or the like.

The above operation information excluding the image information is temporarily stored in a storage device within the first control unit 11, and the data used by the first determination unit 26 is sequentially read out and used to determine the time point at which an event occurs. Ru. The first control unit 11 also causes the CCD camera 20 to capture one image every 100 milliseconds, and sequentially and cyclically store the captured image together with time data in the first memory 18 (memory card to be described later). 25 (primary storage). For example, it is configured such that image data for 24 seconds (240 images) of images captured by the CCD camera 20 is always stored in the first memory 18 . Note that the image taken by the CCD camera 20 may not be taken once every 100 milliseconds, but may be taken once every 50 milliseconds, for example. Further, the configuration may be such that a moving image taken by the CCD camera 20 is stored.

The G sensor 12 detects acceleration in two axis directions (X-axis and Y-axis) that are orthogonal to each other, and transmits the detected acceleration (also referred to as G data) to the first control unit 11 along with time data. The first control unit 11 can acquire G data (Gx, Gy) output from the G sensor 12 at intervals of, for example, 10 milliseconds, and can determine the value (magnitude) of acceleration from the G data.

Note that Gx represents the acceleration in the X-axis direction (the longitudinal direction of the vehicle), and Gy represents the acceleration in the Y-axis direction (the lateral direction of the vehicle). Furthermore, the G sensor 12 may be a 3-axis sensor that includes the Z-axis direction (the vertical direction of the vehicle), or a 3-axis sensor that does not use data on the acceleration Gz in the Z-axis direction. Also good.

The gyro sensor 13 detects the angular acceleration (rotation) of the vehicle, mainly detects changes in the traveling direction of the vehicle (i.e., rotation of the yaw (Z axis), which is a vertical axis), and uses the detected angular acceleration data. is transmitted to the first control unit 11 along with the time data. The first control unit 11 can acquire the angular acceleration data output from the gyro sensor 13 at intervals of, for example, 10 milliseconds, and can determine the value (magnitude) of the angular acceleration from the angular acceleration data.

The atmospheric pressure sensor 14 detects the atmospheric pressure outside the vehicle, calculates the altitude based on the detected atmospheric pressure value, and transmits the atmospheric pressure value and altitude value (atmospheric pressure/altitude data) to the first control unit 11 along with time data. . The first control unit 11 can acquire the atmospheric pressure/altitude data output from the atmospheric pressure sensor 14 at intervals of, for example, 10 milliseconds, and can determine the value (magnitude) of the atmospheric pressure/altitude from the atmospheric pressure/altitude data.

The vehicle signal acquisition unit 21 is connected to a fault diagnosis connector of the vehicle, acquires various signals and information (vehicle data) of the vehicle at intervals of, for example, 100 milliseconds, and uses the acquired vehicle data together with time data in the first control. 11. Vehicle data includes, for example, [1] a signal that detects a brake operation while driving the vehicle, [2] a signal that also detects a blinker operation, [3] a signal that also detects an accelerator operation, and [4] a signal that also detects a steering wheel rotation. the detected signal, [5] the signal that also detected the shift lever position, [6] the signal that also detected the handbrake operation, [7] the vehicle failure diagnosis information obtained from the vehicle failure diagnosis system (OBD) in the vehicle ( [8] Various vehicle information obtained via the in-vehicle LAN (CAN) (various function control data from the own vehicle's ECU (Electronic Control Unit), external networks, etc.) communication data from vehicles, etc.).

As an example, when the vehicle signal acquisition unit 21 acquires a signal that detects a brake operation, the vehicle signal acquisition unit 21 may include brake operation data indicating whether or not the brakes of the vehicle have been operated, and brake operation start time data indicating the time when the brake operation was started. And brake operation end time data indicating the time when the brake operation was ended is transmitted to the first control unit 11 . That is, based on the brake operation data, brake operation start time data, and brake operation end time data from the vehicle signal acquisition section 21, the first control section 11 determines whether or not a brake operation was performed, the time when the brake operation was started, and It is possible to determine the time when the brake operation was completed.

As another example, when the vehicle signal acquisition unit 21 acquires a signal that detects the rotation of the steering wheel, the vehicle signal acquisition unit 21 includes steering wheel rotation data indicating whether the steering wheel of the vehicle has been rotated, and steering wheel rotation start indicating the time when the steering wheel rotation is started. Time data and steering wheel rotation end time data indicating the time when the steering wheel rotation is ended are transmitted to the first control unit 11 . That is, based on the steering wheel rotation data, steering wheel rotation start time data, and steering wheel rotation end time data from the vehicle signal acquisition section 21, the first control section 11 determines whether or not the steering wheel has been rotated, the time when the steering wheel rotation has started, and It is possible to determine the time when the rotation of the steering wheel is completed.

Note that some or all of the GPS antenna 15, the GPS receiver 16, the first IF 19, the CCD camera 20, the vehicle signal acquisition section 21, etc. may be configured separately from the drive recorder 10. For example, when the drive recorder 10 is linked with an existing navigation device having a GPS function, the drive recorder 10 does not need a function such as the GPS receiver 16, so the cost of the drive recorder 10 can be kept low accordingly.

Specifically, the first determination unit 26 in the first control unit 11 of the drive recorder 10 determines when a predetermined condition is satisfied (that is, when an event that should be recorded by the drive recorder 10 occurs). (a) G data output from the internal G sensor 12 when a shock is applied to the vehicle due to sudden braking, sudden steering, a collision, or other events equivalent to the occurrence of an accident. When the value (magnitude) exceeds a predetermined threshold, or when (b) the emergency switch of the first operation unit 17 is pressed, etc., it is determined that the event has occurred. This determination is realized by a process executed by a CPU constituting the microcomputer or the like. Detection of the event occurrence time is used as a trigger to acquire various data from several seconds before and after (for example, 15 seconds before, 5 seconds after, etc.) along with event occurrence time data, and store it on the memory card 25 as one operation information. to be recorded.

The operation information recorded on the memory card 25 includes G data output from the G sensor 12, angular acceleration data output from the gyro sensor 13, atmospheric pressure/altitude data output from the atmospheric pressure sensor 14, and positioning information obtained by the GPS receiver 16. It includes GPS position information, camera image data taken by the CCD camera 20, and various vehicle signals and information (detection data such as brake operation and steering wheel rotation, vehicle speed data, etc.) acquired by the vehicle signal acquisition unit 21.

The drive recorder 10 is capable of handling multiple camera images, one by one, from several seconds before and after (for example, 15 seconds before, 5 seconds after, etc.) from the time when an event to be recorded occurs and a trigger is detected. and records various data of operation information on the memory card 25.

The memory card 25 is a rewritable nonvolatile semiconductor memory card having a storage capacity of 2 GB. This memory card 25 is inserted into a slot constituting the first IF 19 to store a predetermined image (for example, an event Images for 15 seconds before the occurrence and images for 5 seconds after the occurrence are stored. Thereafter, the memory card 25 is ejected from the slot constituting the first IF 19 and reinserted into the slot constituting the second IF 36 of the operation management device 30, and the operation information including the stored image at the time of occurrence of the event is used for operation management. Output to device 30.

Although a semiconductor memory card is used as the memory card 25, the present invention is not limited thereto, and semiconductor memories other than card types, portable hard disks (HD), other storage media, etc. can be used. Furthermore, the storage capacity of a memory card or the like is arbitrary and can be freely determined depending on the purpose.

The operation management device 30 includes a second control section 31, a display section 32 composed of a display, etc., and a display screen in order to realize an event display means for displaying operation information at the time of event occurrence and output other information. An output section 33 consisting of a printer etc. that prints on paper, a second operation section 34 consisting of input devices such as a keyboard and a mouse, a second memory 35 for temporarily storing images, and a memory card 25 are inserted. The second IF (interface) 36 includes a slot for reading images from the memory card 25, and an image processing section 37 for performing predetermined image processing on input images. Operation information at the time the event occurs is displayed on the display unit 32.

The second control unit 31 is a personal computer (PC) that includes a CPU, ROM, RAM, etc., and has operation management software installed therein, and interprets and executes programs included in the operation management software to control the operation management device 30. operate each component of the system to realize various functions.

In addition, the operation management device 30 allows the operator to register a specific point, and furthermore, if the operation information at the time of occurrence of the event is the operation information that occurred while driving at the specific point, the operation management device 30 displays the operation information as an event. The configuration is such that a cancellation function can be implemented. Specifically, the second operation unit 34 registers a specific point by specifying it on the displayed map or inputting latitude and longitude data using a keyboard, mouse, or the like.

The registered specific point is set as a range that includes roads, and if the event occurrence position is within the range of the above specific point, use the cancel function on the event display screen to exclude that event from the display target. be able to. The operator determines whether or not to use this cancel function, and performs the operation using the keyboard, mouse, etc. of the second operation unit 34.

Note that data at a specific point is sent to the first control section 11 of the drive recorder 10 via the second IF 36, memory card 25, and first IF 19, and in the first control section 11, the first determination section 26 detects an event at the specific point. It is also possible to exclude events that have been determined to have occurred from the event targets. That is, in this case, the operation information regarding the event is controlled not to be recorded on the memory card 25.

In this case, as shown in FIG. When it is determined that an abnormal state has occurred, the operation information at the time when the abnormal state occurs is recorded as an event in the memory card 25, regardless of the determination result of the first determination unit 26 and whether or not it is a specific point. is also possible. In this case, the second determination section 27 is also configured as a part of the above-mentioned microcomputer, and the determination is realized by processing executed by the CPU. When an important event such as an accident actually occurs, it is necessary to determine whether the event has occurred, and it is necessary to display the event. The determination by the second determination unit can be made based on whether or not the operation information resembles a predetermined pattern indicating the occurrence of an abnormal condition.

For example, this can be done by comparing a combination of the amplitude and frequency components of the acceleration data Gx, Gy, and Gz, or by comparing these data and velocity data with a preset data pattern.

As described above, FIG. 2 shows an example of a flowchart of a procedure when determining an event at a specific point in the first control section 11 having the second determination section 27. First, operation information necessary for determining when an event occurs is read out. Next, the first determination unit 26 determines whether the above-described event occurrence condition is satisfied based on the operation information. If the event occurrence conditions are not satisfied, the process returns to the beginning and reads out the operation information at the next point in time. When the conditions for event occurrence are met, it is determined whether the event occurrence point is within the range of a registered specific point. If the event occurrence point is not within the range of a specific point, the time of the operation information is determined as the event occurrence time, and the operation information is recorded on the memory card 25. If the event occurrence point is within the range of a specific point, the second determination unit 27 determines whether the operation information is similar to a certain predetermined pattern or not, and the above-mentioned abnormal condition has occurred. Determine whether or not to do so. If it does not correspond to an abnormal state, the event occurrence is canceled, the process returns to the beginning, and the operation information at the next point in time is read. If it corresponds to an abnormal state, the time point of the operation information is determined as the event generation time, and the operation information is recorded in the memory card 25. In this way, by using the cancel function at a specific point and by making the determination by the second determination unit 27 while the vehicle is running, it is possible to determine the occurrence of an event appropriately each time, and the memory card 25 The amount of information to be recorded can be reduced.

Next, the data structure of the contents recorded on the memory card 25 will be explained with reference to FIG. FIG. 3 is a diagram conceptually showing the data structure of the contents recorded on the memory card 25. As shown in FIG.

As shown in FIG. 3, each time an event occurs, corresponding operation information is recorded in the memory card 25, classified into operation information 1, operation information 2, and operation information 3. Operation information 1 is derived from 240 camera images 1 to 240 corresponding to 20 seconds before and after the event (15 seconds before and 5 seconds after) and image-related information including other operation information other than camera images. configured. The image related information includes main item data including G data at the time of event occurrence and its time data, and related data 1 to 240 corresponding to each of the 240 camera images 1 to 240. The same applies to operation information 2 and 3.

The main item data includes G data, angular acceleration data, atmospheric pressure/altitude data, and respective time data, and the image-related data includes the shooting date and time of the camera image, and various signals and information of the vehicle at the time the camera image was taken. (Detection data such as brake operation and steering wheel rotation, vehicle speed data, etc.) and vehicle GPS position information.

Next, with reference to FIG. 4, how the acceleration (G data) detected by the G sensor 12 (see FIG. 1) of the drive recorder 10 changes when an event such as an impact being applied to the vehicle occurs; A method of storing images and the like in the drive recorder 10 will be explained.

4(a) shows a time-series change in the G data (combined value of Gx, Gy) output from the G sensor 12, and FIG. 4(b) shows an example of the image period stored in the memory card 25. It shows.

From the time when a shock is applied to the vehicle, the value (magnitude) of the G data output from the G sensor 12 rapidly increases from almost zero. As shown in FIG. 4(a), when the value (magnitude) of the G data of the G sensor 12 reaches the threshold acceleration Gs (for example, 0.3G) at time tp (time tp), The first determination unit 26 of the first control unit 101 recognizes this as a trigger and determines that an event has occurred. As a result, the first control unit 101 stores in the memory card 25 the images captured by the CCD camera 20 and which are always temporarily stored cyclically in the first memory 18, and also sets the time tp as the event occurrence judgment time data. It operates so that it is stored in the memory card 25 as.

Specifically, as shown in FIG. 4B, control is performed so that the image PA for TA seconds before time tp and the image PB for TB seconds after time tp are stored in the memory card 25. For example, TA can be 15 seconds and TB can be 5 seconds. Note that the periods of TA and TB can be set freely. For example, while displaying the set time (seconds) on the setting screen (not shown) of the drive recorder 10, operate the time setting button on the first operation section 17 of the drive recorder 10 to set the time, and the set information You can set it to any time by saving it.

When an event such as an impact being applied to the vehicle occurs as described above and the value (magnitude) of the G data detected by the G sensor 12 exceeds a predetermined threshold, the first control unit 11 is the event occurrence time data (tp), the detected G data (Gx, Gy) of the G sensor 12 and its time data, the detected angular acceleration data of the gyro sensor 13 and its time data, the atmospheric pressure/altitude data of the atmospheric pressure sensor 14 and its time data. time data, vehicle data for TA seconds before time tp and TB seconds after time tp acquired by the vehicle signal acquisition unit 21, and the time data thereof (for example, brake operation data and its time data, steering wheel rotation data and its (time data, vehicle speed data, time data, etc.) are stored in the memory card 25 along with the image data. Note that the configuration may be such that only part of the data described above is stored in the memory card 25.

Although the number of events stored in the memory card 25 can be varied depending on the storage capacity of the memory card 25, it is preferable that data for 500 events or more can be stored, for example. The first control unit 11 also creates a folder in the memory card 25 for each event, and stores image data, event occurrence time data (tp), G data (Gx, Gy) of the G sensor 12 and its time data, and angle data. It is preferable to store acceleration data and its time data, atmospheric pressure/altitude data and its time data, and vehicle data and its time data.

In addition, when the above-mentioned event occurs, exceeding the threshold acceleration Gs is used as a trigger for the event occurrence, but for example, if the amount of change in acceleration per unit time exceeds a certain value (G An event may be recognized as occurring when the data value (size) changes by 0.1 G or more. In addition, in the above example, the event generation trigger is when the composite value of Gx and Gy exceeds a predetermined value, but the event can be determined using the magnitude of each acceleration component Gx, Gy, and Gz. Good too. For example, after Gx exceeds a predetermined threshold value, Gy exceeds a predetermined threshold value within a predetermined time. (occurrence). Further, the determination may also be made taking into consideration the acceleration Gz in the Z direction (vertical direction).

An acceleration change exceeding the threshold acceleration Gs may occur, for example, when the brakes are applied suddenly or when the vehicle turns suddenly. FIG. 5 is a diagram showing changes in acceleration in the case of sudden steering, and shows time-series changes in G data (combined value of Gx and Gy) output from the G sensor 12.

As shown in FIG. 5, when the steering wheel suddenly starts to be turned at time t3, the G sensor 12 mainly detects the acceleration (Gy) in the left and right direction of the vehicle, and the acceleration changes. The acceleration (G data) from the G sensor 12 gradually increases from time t3 (that is, the acceleration in the direction opposite to the turning direction of the vehicle increases), and it reaches the threshold acceleration Gs (for example, 0.3 G). (time tp), the first control unit 11 recognizes this as a trigger, determines that an event has occurred, and displays the image captured by the CCD camera 20 and always stored cyclically in the first memory 108. It also operates to store the time tp in the memory card 25 as event occurrence determination time data.

After time tp, the acceleration continues to increase, and after reaching the local maximum value, it starts to decrease and gradually decreases (that is, the acceleration in the direction opposite to the direction in which the vehicle is turning becomes smaller), and then suddenly decreases. , after passing through the zero point, it further decreases (i.e., the acceleration in the direction of the vehicle turning increases), reaches a local minimum value (minimum value), and then increases rapidly (i.e., the acceleration in the direction of the vehicle turns decreases). , becomes zero when the vehicle finishes turning and the steering wheel finishes turning (that is, the steering wheel is returned to its original position) (time t4).

In FIG. 5, the period Tf from time t3 to time tp is "the period from the beginning of dangerous driving to immediately before the occurrence of the trigger," and the period Tg from time tp to time t4 is the period of "dangerous driving behavior."

FIG. 6 is a diagram showing a change in acceleration in the case of a vehicle collision, and shows a time-series change in G data (combined value of Gx and Gy) output from the G sensor 12.

As shown in FIG. 6, when the vehicle collides with something at time t5, the G sensor 12 detects and changes the longitudinal acceleration (Gx) and the lateral acceleration (Gy) of the vehicle. The acceleration (G data) from the G sensor 12 increases rapidly immediately after time t5, and after repeating a rapid decrease in which it further decreases rapidly, it suddenly increases and reaches the threshold acceleration Gs (for example, 0.3G). (time tp), the first control unit 11 recognizes this as a trigger, determines that an event has occurred, and displays the image captured by the CCD camera 20 and always stored cyclically in the first memory 18. is stored in the memory card 25, and time tp is stored in the memory card 25 as event occurrence determination time data.

Specifically, similarly to FIG. 4, control is performed so that the image PA for TA seconds before time tp and the image PB for TB seconds after time tp are stored in the memory card 25.

After time tp, the acceleration continues to increase, reaches the local maximum value, then rapidly decreases, passes through the zero point, reaches the local minimum value, then rapidly increases, passes through the zero point again, and reaches the local maximum again. After reaching the value (maximum value), it rapidly decreases, passes through the zero point again, repeats the rapid decrease, and then becomes zero at the time (t6) when the vehicle stops and the acceleration converges.

In FIG. 6, a period Th from time t5 to time tp is a "period of impact before a large impact," and during this period Th, an impact waveform appears due to impact reduction due to the effect of the vehicle's bumper, guardrail, etc. Further, a period Ti from time tp to time t6 is a period of "impact behavior".

7, 8, and 9 are diagrams showing display examples of the event display screen displayed on the display unit of the operation management device 30, and FIG. The screen shown in FIG. 8 is an operation screen for excluding events at a specific point from being displayed, and FIG. 9 is the screen after excluding events at a specific point from being displayed. In this display example, the memory card 25 that is installed in the drive recorder 10 and records operation information including camera images and image-related information is taken out and displayed on the display unit 32 of the operation management device 30, and the memory card 25 is displayed at a specific point. This is an example of a case where the operation management device 30 performs an operation to exclude the event from the display target.

In FIG. 7, on the map screen 50 displayed at the bottom right, the occurrence points of four events <1> to <4> that occurred within a predetermined period within that range are displayed on the map screen 50. The four images 52 at the time of each event occurrence are arranged and displayed in order from the left in the upper left part of the display screen. The above-mentioned fixed period can be, for example, within one year, within several months, within several weeks, etc. Further, the date and time of occurrence of each event and the type of event are displayed in the upper right image 51. Furthermore, the operation information of the second event <2> selected in the image 51, that is, the numerical data of the speed, acceleration, and position at the time of the event occurrence, is displayed in the lower left image 53, and the temporal relationship of the acceleration before and after the event occurrence is displayed. The changes are displayed in the image 54 at the bottom. Further, the map screen 50 displays specific points A and B registered within the range.
In FIG. 7, only one image at the time of occurrence of each event is displayed; It is also possible to display a plurality of images per second in chronological order in the image 55 that is a space in FIG.

When excluding events at a specific point from the display target, the operation screen shown in FIG. 8 is displayed. This display operation is performed, for example, by moving the pointer to a specific point surrounded by a square displayed on the map or to the image 56 on the screen and performing a click operation, or by inputting from the keyboard. . In this display screen, an image 56 showing specific points A and B included in the map screen 50 is displayed above the map screen 50. The specific point is set as a range including the road as described above, and in FIG. 8, the occurrence position of event <4> is within the range of specific point B, so event <4> is selected. Next, when excluding event <4> from the display target based on the operator's judgment such as the level of event <4> and past driving experience, the event <4> is displayed in the image 57 between the image 56 and the map screen 50. press the cancel button. As a result, event <4> is excluded from display targets. FIG. 9 is an image showing a state in which event <4> is excluded from display targets after the above operation.

FIG. 10 is a diagram showing a schematic configuration of a traffic management system according to the second embodiment. As shown in FIG. 10, the operation management system of this embodiment includes a drive recorder 60 installed in a vehicle, a memory card 65 for storing operation information in the drive recorder 60, and operation information stored in the memory card 65. The system is comprised of an operation management device 70 for determining the time point at which an event occurs using the system, and displaying and managing the event.

In this embodiment, operation information is continuously acquired at predetermined fixed time intervals while the vehicle is in operation, and all of this operation information is recorded in the memory card 65 along with time data. For example, the unit of operation recorded is from engine on to engine off. Further, as the fixed time interval, for example, about several milliseconds to several tens of milliseconds can be selected. In this embodiment, the first determination section 76 as a first determination means for determining the time point at which an event occurs and the second determination section 77 as a second determination means for determining the occurrence of an abnormal state are operated by the operation management device. It is provided in the second control section 71 of 70. The CCD camera 20 captures one image every 50 to 100 milliseconds, and sequentially stores the captured images in the first memory 18 along with time data. This stored image data may be recorded as is on the memory card 65, or the rate of change in the image may be detected and the time interval at which images are recorded on the memory card 65 may be adjusted according to the rate of change. . Further, the configuration may be such that a moving image taken by the CCD camera 20 is stored in the memory card 65. Regarding parts other than the above, the configurations of the drive recorder 60 and the traffic management device 70 are the same as those in FIG. 1.

The method of determining the time point at which an event occurs based on the operation information in the first determination unit 76 and the second determination unit 77 is the same as in the first embodiment, but in this embodiment, after operation, the operation management device 70 In this step, it is possible to set or change the judgment conditions in the first judgment unit 76. Furthermore, it is possible to select whether or not to use the cancellation function at a specific point after the trip.

The display image on the traffic management device 70 can also be a display image similar to the display examples shown in FIGS. 7 to 9, but other display methods are also possible. FIG. 11 is a map screen showing an example of a display screen. In the map screen of FIG. 11, information related to the event displayed at the event occurrence point on the map is displayed in the form of a table. In the table 81, the level of the event is displayed as H or L, and the number of occurrences of the same event at the same point in a predetermined period is also displayed.

FIG. 12 is a map screen showing an example of another display screen. In FIG. 12, three events that occurred in a predetermined period at the point of event <2> are displayed in a table 82. This event occurs when the direction of travel of the vehicle is from the top to the bottom of the map screen, and in Table 82, the direction of travel is indicated by an arrow.

As another display method, it is also possible to display all the events that occurred within the range of the displayed map during a certain period of time, together with the number of occurrences for each location and event type. As mentioned above, when displaying event information in the form of a table on the map screen, you can use the cancel function at a specific point to remove the event at that point from the display target, for example, as follows. can. One method is to display a specific point on the map screen at the same time as the event occurrence point, similar to the map screen in Figure 7, and remove it from the display by moving the pointer to an event within the specific point and clicking. Another method is to move the pointer to an event in the table or an event on the map and click to display whether or not the event occurrence point is within a specific point. For example, if there is a cancellation button, a cancel button is displayed to enable cancellation. It is also possible to implement the cancel function by inputting an event number or the like using the keyboard.

<Modified example>
The present invention is not limited to the contents described in the embodiments of the present invention described above, and various modifications are possible. As a modification thereof, for example, it may be implemented as follows.

(1) In the embodiment described above, the time when the value (magnitude) of the G data output from the G sensor 12 reaches the threshold acceleration Gs (time tp) is recognized as a trigger, and it is determined that an event has occurred. However, the present invention is not limited to this, and for example, when the value (magnitude) of the angular acceleration data output from the gyro sensor 13 or the atmospheric pressure/altitude data output from the atmospheric pressure sensor 14 reaches a predetermined value, it may be recognized as a trigger. , it may be determined that an event has occurred. Alternatively, it may be determined that an event has occurred based on the result of analyzing the recorded video.
In addition, when the emergency switch of the first operation unit 17 is pressed, when there is a signal input from an external port, and when there is communication from external equipment such as AVM-ECU (Automatic Vehicle Monitoring - Engine Control Unit) (for example, The event occurrence time may be the time when a command is received via RS-232C).

(2) The method for displaying images related to events is to display images for each event, such as sudden braking, sudden steering, and vehicle collision, at four points in time before and after the event, from among images stored for a predetermined period of time for each event. It is possible to display photographed images, select and display a plurality of images photographed at a plurality of different time points other than the four time points, and so on. Furthermore, various combinations of the plurality of different time points may be used depending on the type of event, but it is preferable to use a combination of time points at which the characteristics of the event appear (a specific period within a predetermined period).
The combination of points in time when the characteristics of an event appear can be determined by using various types of data stored in the memory card 25 together with the image data, such as "data on detected vehicle behavior" and "data on the functional status of the vehicle," either singly or in combination. It is preferable that a plurality of images taken at appropriate timings are selected based on these data, and the selected images are displayed.

The "data that detected vehicle behavior" may be, for example, acceleration data, angular acceleration data, atmospheric pressure/altitude data, video analysis data, etc. In addition, "data related to the functional state of the vehicle" includes, for example, data related to the operation of the brake, turn signal, accelerator, steering wheel rotation, shift lever position, and handbrake during vehicle operation, and the vehicle failure diagnosis system. It is preferable to use data obtained from OBD (On Board Diagnosis) or CAN (Controller Area Network), which is an in-vehicle LAN.

(3) Not limited to the embodiments described above, information that is different from the information used to determine that an event has occurred (for example, G data (Gy) in the left and right direction of the vehicle due to sudden steering) (for example, when the vehicle due to sudden braking An image captured at a time when G data (Gx) in the front-rear direction reaches a predetermined value (for example, a local maximum value, etc.) may be selected and displayed. As a result, the information used to determine that an event has occurred (for example, G data (Gy) due to sudden steering) and different information (for example, G data (Gx) due to sudden braking) reach a predetermined value. Easily find images related to an event.

(4) Not limited to the embodiments described above, for example, if the value (magnitude) of G data reaches the threshold acceleration Gs and it is determined that an event has occurred (time tp), Sub-events that caused the occurrence of events, such as the point at which the G data reaches a minimum value, the point at which it becomes an inflection point in the time-series change of the G data, or the point at which the G data undergoes a characteristic change such as repeated rapid decreases in a short period of time. It is also possible to select and display an image captured at the time when the time of occurrence of the event is estimated. As a result, it is possible to easily find images related to an event at a point in time when a characteristic change such as a sudden decrease in G data occurs, for example, to estimate the point in time when a sub-event that caused the event occurred. can.

(5) In the embodiments described above, the traffic management system of the present invention was explained using a configuration in which a drive recorder and a traffic management device were combined as in the configuration example of FIG. 1 or FIG. It can be implemented as a function of For example, it may be incorporated as a function in a navigation device, drive recorder, radar detector, or car audio.

(6) Not limited to the embodiments described above, the control program prestored in the ROM of the second control unit 31 or 71 of the operation management device 30 or 70 can be implemented on a general-purpose personal computer, a mobile phone, a smartphone, or a portable game machine. The computer installed in the mobile terminal executes the control processing of the second control unit 31 or 71, reads the images and various data stored in the memory card 25 or 65, and causes the computer installed in the mobile terminal to execute the control processing of the second control unit 31 or 71 and read the images and various data stored in the memory card 25 or 65. It is also possible to display images that have been created or images that have been created from various types of data.

(7) Each function of the above embodiment is realized by writing the function in a computer-readable programming language and having the computer of the second control unit 31 or 71 execute the program. However, the present invention is not limited to this, and for example, the program may be distributed to multiple computers and processed in a distributed manner.

10, 60 Drive recorder 11, 61 First control section 12 Acceleration sensor (G sensor)
13 Gyro sensor 14 Barometric pressure sensor 15 GPS antenna 16 GPS receiver 17 First operation unit 18 First memory 19 First IF (interface)
20 CCD camera 21 Vehicle signal acquisition section 22 Power supply section 25, 65 Memory card 26, 76 First judgment section 27, 77 Second judgment section 30, 70 Operation management device 31, 71 Second control section 32 Display section 33 Output section 34 Second operation unit 35 Second memory 36 Second IF (interface)
37 Image processing section 38 Display processing section 50 Map screen

Claims (6)

The first screen, which is a screen before excluding events at a specific point from display targets, transitions to the second screen, which is an operation screen for excluding events at a specific point from display targets, and Provide a function to move from the screen to the third screen, which is the screen after excluding events at a specific point from the display target.
An operation management system featuring: Displaying a map screen on the first screen, the second screen, and the third screen,
Provided with a function to display on the map screen the occurrence points of events that occurred within a predetermined period within the range of the map screen on the first screen.
The traffic management system according to claim 1, characterized in that: The first screen is provided with a function of displaying a plurality of images in chronological order during a certain period before and after the event occurs.
The traffic management system according to claim 1 or 2, characterized in that: The transition from the first screen to the second screen is performed based on a click operation performed by moving the pointer to a specific point on the map displayed on the first screen.
The traffic management system according to any one of claims 1 to 3, characterized in that: The transition from the second screen to the third screen is performed based on a cancellation operation for the event selected on the second screen.
The traffic management system according to any one of claims 1 to 4, characterized by: A program for causing a computer to implement the functions of the traffic management system according to any one of claims 1 to 5.

Images