JP6587438B2 - Inter-vehicle information display device - Google Patents

Description

  The present invention relates to an inter-vehicle information display device that displays inter-vehicle information.

Conventionally, there is an in-vehicle device that generates an inter-vehicle distance alarm by analyzing an image captured by a camera. In addition, there is a computer device (PC) that displays the measurement result of the inter-vehicle distance in combination with the function of the drive recorder.
As a prior art of this type, there is known a driving support device that displays a driving state bar graph showing a stepwise indicator of a safe inter-vehicle distance corresponding to a change in vehicle speed on a video (see Patent Document 1). .

JP 2008-225908 A

However, conventionally, even if the PC displays the speed graph based on the data of the measurement result of the inter-vehicle distance, it has not been sensible for the operation manager to know whether the vehicle is close to the vehicle ahead. Moreover, even when the video of the drive recorder was viewed on a PC, the sense of distance was different compared to the case of viewing the vehicle ahead with the naked eye.
Moreover, in patent document 1, although the parameter | index of the safe inter-vehicle distance is shown by the bar graph superimposed on an image | video, the actual inter-vehicle distance is not acquired and it is judged at a glance whether it is a safe inter-vehicle distance. It was difficult.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an inter-vehicle information display device that makes it easy to visually understand the degree of danger with respect to inter-vehicle distance.

In order to achieve the above-described object, the inter-vehicle information display device according to the present invention is characterized by the following (1) to (4).
(1) A speed acquisition unit that acquires the speed of the host vehicle, an inter-vehicle distance acquisition unit that acquires an inter-vehicle distance to a preceding vehicle, a storage unit that stores the speed of the host vehicle and the inter-vehicle distance in time series, An area setting unit in which an inter-vehicle distance zone corresponding to the speed of the host vehicle is set in advance, a display unit that displays the inter-vehicle distance to the preceding vehicle, and the speed of the host vehicle stored in time series in the storage unit. A controller that sequentially reads and displays an animation for continuously displaying the inter-vehicle distance zone corresponding to the read speed of the host vehicle on the display unit, and the control unit stores time in the storage unit. A speed graph representing a time change of the speed of the host vehicle based on data of the speed of the host vehicle and the inter-vehicle distance stored in a series, and an inter-vehicle distance graph representing a time change of the inter-vehicle distance; as well as The inter-vehicle distance graph is displayed on the first screen in the display unit together with a seek bar that can be moved and operated in the time axis direction across the speed graph and the inter-vehicle distance graph, and the speed of the host vehicle that the seek bar currently indicates And the inter-vehicle distance is displayed on the second screen in the display unit, and then the animation is displayed when an animation instruction is given.
(2) The inter-vehicle information display device configured as described in (1) above, wherein when the preceding vehicle is present in the inter-vehicle distance area, the control unit displays the inter-vehicle distance area, and the inter-vehicle distance area When there is no preceding vehicle, the control unit does not display the inter-vehicle distance area.
(3) In the inter-vehicle information display device configured as described in (1) above, when the inter-vehicle distance to the preceding vehicle is equal to or less than a threshold, the control unit displays the inter-vehicle distance area.
(4) The inter-vehicle information display device according to any one of the above (1) to (3), further comprising a position acquisition unit that acquires the position of the host vehicle, wherein the display unit displays the host vehicle on a map. Displaying the inter-vehicle distance zone centered on the position of the vehicle.

According to the inter-vehicle information display device having the configuration (1), the degree of danger with respect to the inter-vehicle distance can be easily understood visually.
According to the inter-vehicle information display device having the configuration (2) above, when the preceding vehicle is in the inter-vehicle distance area, the inter-vehicle distance area is displayed, so that the driver visually notices the presence of the preceding vehicle, Be aware of the distance between cars.
According to the inter-vehicle information display device configured as described in (3) above, when the inter-vehicle distance to the preceding vehicle is equal to or less than the threshold, the inter-vehicle distance zone is displayed, so that the driver visually notices the presence of the preceding vehicle, Be aware of the distance from the vehicle ahead.
According to the inter-vehicle information display device configured as described above (4), the inter-vehicle distance area centered on the position of the host vehicle is displayed on the map, so it is possible to present inter-vehicle information as part of the navigation function. As a result, convenience is improved.

  According to the present invention, it is possible to visually understand the degree of danger with respect to the distance between vehicles.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a block diagram showing a configuration of an inter-vehicle distance warning system in the embodiment. FIG. 2 is a diagram showing the registration contents of the table in which the inter-vehicle distance zone is set. FIG. 3 is a flowchart showing a recording operation procedure by the drive recorder. FIG. 4 is a diagram illustrating an image ahead of the host vehicle captured by the camera. FIG. 5 is a flowchart showing the inter-vehicle distance confirmation procedure by the office PC. FIG. 6 is a diagram showing a screen of a display unit on which a graph showing a time change in the speed of the host vehicle and the inter-vehicle distance from the preceding vehicle is displayed. FIG. 7 is a diagram showing a screen of the display unit on which the inter-vehicle distance information is displayed. FIG. 8 is a diagram illustrating a screen of the display unit on which the inter-vehicle distance information in the modified example is displayed.

  Specific embodiments relating to the present invention will be described below with reference to the drawings.

The inter-vehicle information display device of the present embodiment is applied to an inter-vehicle distance alarm system that visualizes an inter-vehicle distance alarm.
FIG. 1 is a block diagram illustrating a configuration of an inter-vehicle distance warning system 5 in the embodiment. The inter-vehicle distance warning system 5 is mainly composed of a drive recorder 10 mounted on a vehicle and a computer device (referred to as an office PC) 30 installed in an office.

  The drive recorder 10 includes a CPU 11, RAM 22, ROMs 23 and 26, a data processing unit 24, an image processing unit 13, a camera 16, an acceleration (G) sensor 14, a speaker 20, a card I / F 18, a speed I / F 12, a GPS_I / F 15, and A power supply I / F 25 is included.

  The CPU 11 comprehensively controls each unit of the drive recorder 10. The RAM 22 is used as a working memory in which data (work data) is temporarily stored when the CPU 11 executes an operation program. The ROM 23 stores an operation program (program data) executed by the CPU 11. The ROM 26 stores the data acquired by the drive recorder 10 as backup data.

  The speed I / F 12 receives a speed pulse from a speed sensor (shown) that detects the speed of the host vehicle. The GPS_I / F 15 receives (GPS data) representing the current position of the host vehicle, and acquires information on the current date and time included in the GPS data. The G sensor 14 detects an impact (acceleration) applied to the vehicle.

  The camera 16 is a high-quality camera and captures an image in front of the vehicle. The image processing unit 13 calculates the inter-vehicle distance between the host vehicle and the preceding vehicle based on the image captured by the camera 16. Here, the image processing unit 13 can calculate up to an inter-vehicle distance of 60 m based on an image captured by the camera 16. That is, when the distance exceeds 60 m, the recognition accuracy of the preceding vehicle by image analysis is lowered, so that the inter-vehicle distance to the preceding vehicle exceeding 60 m is not calculated. The image processing unit 13 analyzes the image captured by the camera 16 and acquires the inter-vehicle distance based on the distance between the tail lamps and the rear wheels of the vehicle shown in the front image.

  The data processing unit 24 outputs data such as the speed of the host vehicle and the inter-vehicle distance to the card I / F 18 in accordance with an instruction from the CPU 11. The card I / F 18 stores and reads various data with respect to the memory card 55 that is detachably connected.

  The speaker 20 gives various voice instructions to the driver. The power supply I / F 25 is connected to the battery via an ignition switch, and supplies power to each unit when the ignition switch is turned on.

  On the other hand, the office PC 30 is configured by a computer device (PC) that operates on a general-purpose operating system. The office PC 30 functions as an operation management device, and includes a CPU 31, a communication unit 32, a display unit 33, a storage unit 34, a card I / F 35, an operation unit 36, an output unit 37, a voice I / F 38, and a map database 39.

  The CPU 31 controls the entire office PC 30. The communication unit 32 can communicate with various devices connected to the network. The display unit 33 displays a screen such as inter-vehicle distance information described later. The storage unit 34 stores a table 34z in which operation programs and inter-vehicle distance zones are set.

  A memory card 55 is detachably attached to the card I / F 35, and various data are input thereto. The operation unit 36 includes a keyboard, a mouse, and the like, and accepts an operation by an operation manager or the like. The output unit 37 outputs various data to the printer 45 to perform printing. A microphone 41 and a speaker 42 are connected to the audio I / F 38. A map database (DB) 39 stores map data, and outputs map data based on position information such as a GPS position. The office PC 30 may acquire map data from a cloud server on the network and display the map data on the display unit 33 without having the map DB 39.

  FIG. 2 is a diagram showing the registration contents of the table 34z in which the inter-vehicle distance zone is set. In the inter-vehicle distance zone table 34z, three zones, a danger zone, a caution zone, and a safety zone, are set as inter-vehicle distance zones corresponding to the speed of the host vehicle.

  The danger zone is an area that is uniquely determined by the inter-vehicle time, approaches the vehicle ahead, and is judged to have a high risk of rear-end collision. Here, the inter-vehicle distance according to the speed of the host vehicle is set based on the inter-vehicle time determined to be high risk. For example, when the speed of the host vehicle is 60 km / h, the inter-vehicle distance is within 20 m. When the vehicle speed is set to 80 km / h, the inter-vehicle distance is set within 25 m. These numerical values are merely examples, and the settings can be changed. Further, the inter-vehicle distance in the danger zone corresponding to the speeds of all the own vehicles may be set so that the inter-vehicle time is constant.

  The caution zone is an area that is uniquely determined by the inter-vehicle time and is determined to require attention for driving because the distance to the preceding vehicle is shortened. Here, the inter-vehicle distance is set according to the speed of the host vehicle based on the inter-vehicle time determined to require attention. When the host vehicle speed is 60 km / h, the inter-vehicle distance is set within 30 m. When the speed of the host vehicle is 80 km / h, the inter-vehicle distance is set within 40 m. These numerical values are merely examples, and the settings can be changed. Further, the inter-vehicle distance in the attention zone corresponding to the speeds of all the own vehicles may be set so that the inter-vehicle time is constant.

  The safety zone is an area that is uniquely determined by the inter-vehicle time, has a sufficient distance to the vehicle ahead, and is determined to be safe. Here, the inter-vehicle distance according to the speed of the host vehicle is set based on the inter-vehicle time determined to be safe. When the speed of the host vehicle is 60 km / h, the inter-vehicle distance is set within 40 m. When the speed is 80 km / h, the inter-vehicle distance is set within 60 m. These numerical values are merely examples, and the settings can be changed. Further, the inter-vehicle distance in the attention zone corresponding to the speeds of all the own vehicles may be set so that the inter-vehicle time is constant.

  The table 34z shows two cases where the speed of the host vehicle is 60 km / h and 80 km / h, but the same applies to other speeds such as 50 km / h and 70 km / h. Further, these intermediate speeds (for example, 65 km / h, 75 km / h, etc.) can be calculated by interpolation processing. For example, the 65 km / h danger zone is set to within 21.25 m by performing linear interpolation using a distance of 20 m for 60 km / h and a distance of 25 m for 80 km / h. It is also possible to do.

  Thus, since each zone varies depending on the speed of the host vehicle, the inter-vehicle time may be calculated from the speed, and one value of each zone corresponding to the inter-vehicle time may be set in the table.

  Here, the inter-vehicle distance zone is set as a value corresponding only to the speed of the host vehicle, but may be set in consideration of other factors. For example, it may be set more finely depending on the vehicle type, weather, time zone, road conditions, and the like. When the vehicle type is a large vehicle, the value of each zone is set so that the inter-vehicle distance is longer than that of a small vehicle. In addition, the value of each zone is set so that the distance between the vehicles is longer when the weather is rainy than when it is sunny. In the case of nighttime, the value of each zone is set so that the inter-vehicle distance is longer than in the daytime. When the road is a slope, the value of each zone is set so that the inter-vehicle distance is longer than that of a flat road. This makes it possible to set each zone more appropriately. The number of inter-vehicle distance zones is not limited to the above three, and may be two or four or more, and the driver may arbitrarily set the number of zones.

  Operation | movement of the inter-vehicle distance warning system 5 which has the said structure is shown. FIG. 3 is a flowchart showing a recording operation procedure by the drive recorder 10. The CPU 11 in the drive recorder 10 acquires the speed of the host vehicle based on the speed pulse input via the speed I / F 12 (S1).

  The CPU 11 calculates the distance to the vehicle ahead (inter-vehicle distance) included in the image captured by the camera 16 (S2). There are various methods for calculating the inter-vehicle distance based on the captured image. For example, the distance to the tail lamp of the vehicle ahead and the distance to the rear wheel are calculated by comparing with a preset value. FIG. 4 is a diagram illustrating an image in front of the host vehicle captured by the camera 16. Two vehicles 81 and 82 are shown in the front image. The image processing unit 13 acquires that the inter-vehicle distance is 20 m and 40 m based on the distance to the rear wheels of the vehicles 81 and 82, respectively. The inter-vehicle distance may be calculated by the office PC 30 instead of being calculated by the drive recorder.

  CPU11 receives GPS data via GPS_IF15, acquires the information of the present position (GPS position) of the own vehicle from GPS data, and acquires the information of the present date and time contained in GPS data (S3). The CPU 11 records the speed of the host vehicle, the inter-vehicle distance, the GPS position, and the captured image obtained in the above steps in the memory card 55 in time series (S4).

  Thereafter, the CPU 11 determines whether or not the operation has been completed by an OFF operation of the ignition key or the like (S5). When the operation is not finished, the CPU 11 returns to the process of step S1 and performs the same operation. On the other hand, when the operation is finished, the CPU 11 finishes this operation. When this recording operation is performed, the various data are recorded in time series on the memory card 55.

  Then, the driver brings the memory card 55 to the office, inserts it into the card I / F 35 of the office PC 30, and reads the operation data.

  FIG. 5 is a flowchart showing the inter-vehicle distance confirmation procedure by the office PC 30. The CPU 31 in the office PC 30 creates a graph representing the time change of the speed and the inter-vehicle distance based on the data of the speed and the inter-vehicle distance recorded in time series on the memory card 55 inserted in the card I / F 35. It is displayed on the display unit 33 (S11). FIG. 6 is a diagram showing a screen of the display unit 33 on which a graph GR indicating the time change of the speed of the host vehicle and the inter-vehicle distance from the preceding vehicle is displayed. In this graph GR, a seek bar SK is displayed so as to straddle the speed graph and the inter-vehicle distance graph. In the inter-vehicle distance graph, there is a region where the inter-vehicle distance is 0 in the middle. This indicates that measurement is impossible because the vehicle ahead is far away to a position exceeding 60 m. The speed indicated by the seek bar SK, the inter-vehicle distance, and the captured image captured by the drive recorder 10 are displayed as another screen in the display unit 33. When the operation manager moves the seek bar SK in the left-right direction in the figure, the captured image and the like are switched accordingly. As a result of the operation manager looking at the screen of the display unit 33, when it is desired to obtain information on the inter-vehicle distance, it can be displayed in an animation as will be described later.

  CPU31 discriminate | determines whether there was the animation instruction | indication by the operation manager via the operation part 36 (S12). In FIG. 7 described later, pressing the play button 93 corresponds to an animation instruction. When there is no animation instruction, the CPU 31 ends this operation as it is. On the other hand, if there is an animation instruction, the CPU 31 proceeds to the processing after step S13.

  The CPU 31 sequentially reads data on speed, GPS position, time, and inter-vehicle distance recorded in time series (S13). The CPU 31 calculates the inter-vehicle time based on the speed of the host vehicle and the inter-vehicle distance, refers to the table 34z stored in the storage unit 34, and sets the inter-vehicle distance zone (danger zone DZ, caution zone) corresponding to the speed of the host vehicle. AZ, safety zone SZ) is set (S14).

  The CPU 31 determines whether or not the preceding vehicle has entered a predetermined inter-vehicle distance zone based on the inter-vehicle distance (S15). The predetermined inter-vehicle distance zone may be set to any of the danger zone DZ, the caution zone AZ, and the safety zone SZ. If not in the predetermined inter-vehicle distance zone, the CPU 31 proceeds to the process of step S17.

  On the other hand, when the preceding vehicle enters a predetermined inter-vehicle distance zone, the CPU 31 reads out map data from the map DB 39 based on the GPS position information, displays a map on the screen of the display unit 33, and further, as inter-vehicle distance information. The danger zone, the caution zone and the safety zone set in step S14, the vehicle mark drawn at the GPS position, and the speed information are superimposed on the displayed map (S16). Further, the CPU 31 displays the operation panel 90 below the screen of the display unit 33.

  FIG. 7 is a diagram illustrating a screen of the display unit 33 on which the inter-vehicle distance information is displayed. A map MA is displayed on the screen of the display unit 33. In addition, on the screen of the display unit 33, a host vehicle icon 75 simulating the host vehicle and a front vehicle icon 78 simulating the preceding vehicle are displayed. Further, the screen of the display unit 33 is divided into a dotted arc centered on the position of the host vehicle icon 75, a danger zone DZ within an inter-vehicle distance of 20 m, an attention zone AZ within an inter-vehicle distance of 30 m, and A safety zone SZ within a distance of 40 m is displayed. An operation panel 90 is displayed below the screen of the display unit 33. The operation panel 90 includes a play button 93, a pause button 92, and a stop button 91.

  When the operation manager presses the playback button 93 on the operation panel 90, the animation operation starts. While the playback button 93 is pressed, the CPU 31 continuously performs the processes of steps S13, S14, and S15 described above to update the screen displayed on the display unit 33. Thereby, the animation operation of the inter-vehicle distance information is performed. In this animation operation, the host vehicle icon 75 may be moved and the map MA may be moved, or the host vehicle icon 75 may be fixed and only the map MA may be moved.

  Thereafter, the CPU 31 determines whether or not there is an animation end instruction (S17). Pressing the stop button 91 on the operation panel 90 corresponds to an instruction to end the animation. When the pause button 92 on the operation panel 90 is pressed in step S16, the CPU 31 interrupts the display operation and waits until the pause button 92 is pressed again. On the other hand, if there is an animation end instruction in step S17, the CPU 31 ends this operation.

  In the inter-vehicle distance warning system 5 according to the present embodiment, the drive recorder 10 acquires the speed of the host vehicle by a speed pulse input from the speed I / F 12, and the inter-vehicle distance from the image captured by the camera 16 to the preceding vehicle. Get the distance. The drive recorder 10 stores the speed of the host vehicle and the inter-vehicle distance in the memory card 55 in time series via the card I / F 18. The office PC 30 stores in the storage unit 34 a table 34z in which an inter-vehicle distance zone (inter-vehicle distance area) corresponding to the speed of the host vehicle is set in advance. The office PC 30 sequentially reads the speed of the host vehicle stored in time series in the storage unit 34, and displays an inter-vehicle distance zone corresponding to the speed of the host vehicle in which a host vehicle icon 75 and a forward vehicle icon 78 are displayed. 33 is continuously displayed.

  Thus, since the inter-vehicle distance information is continuously displayed on the display unit and visualized by the animation, the degree of danger to the inter-vehicle distance can be visually easily understood for the driver. In this case, the inter-vehicle distance warning system 5 including the drive recorder 10 and the office PC 30 corresponds to the inter-vehicle information display device, but the office PC alone corresponds to the inter-vehicle information display device. That is, the office PC 30 may acquire the vehicle speed and inter-vehicle distance data from the memory card 55, store these data in the storage unit 34, and display the inter-vehicle distance zone on the display unit 33.

  Further, when the preceding vehicle enters the inter-vehicle distance zone, for example, when entering the safety zone SZ, the caution zone AZ, or the danger zone DZ, the inter-vehicle distance zone is displayed, so that the driver visually recognizes the presence of the preceding vehicle. Awareness and awareness of the distance from the vehicle ahead.

  In addition, when the inter-vehicle distance to the preceding vehicle falls below a threshold value (for example, a value corresponding to the inter-vehicle time requiring attention), the inter-vehicle distance zone is displayed. Similarly, the driver visually indicates the presence of the preceding vehicle. And become aware of the distance from the vehicle ahead.

  In addition, since the inter-vehicle distance zone centered on the position of the vehicle is displayed on the map including the position of the vehicle, it becomes possible to present inter-vehicle distance information as part of the navigation function, improving convenience. .

In the above-described embodiment, the forward vehicle icon 78 is displayed. However, when the forward vehicle does not exist within a distance (for example, 60 m) that can be detected as the inter-vehicle distance information, it may not be displayed. In this case, the driver can know that there is no forward vehicle that requires attention.
(Modification)

  In the above embodiment, when the inter-vehicle distance information is displayed on the screen of the display unit 33, the information is displayed so as to be superimposed on the map, but may be displayed without displaying the map.

  FIG. 8 is a diagram illustrating a screen of the display unit 33 on which the inter-vehicle distance information in the modified example is displayed. In this case, no map is displayed on the screen of the display unit 33, and the vehicle 86 icon 75, the forward vehicle icon 78, and various zones (danger zone DZ, caution zone AZ, The safety zone SZ), the speed information and the operation panel 90 are displayed.

  In this animation operation, the host vehicle icon 75 is fixed, and the various zones and the position of the forward vehicle icon 78 are displayed to change in the left-right direction.

  Since the map information is not displayed, the load on the display process of the CPU 31 can be reduced accordingly. In this case as well, the forward vehicle icon 78 is displayed, but may not be displayed when no forward vehicle exists within a distance (for example, 60 m) that can be detected as the inter-vehicle distance information. In this case, the driver can know that there is no forward vehicle that requires attention.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the above embodiment, after driving, the driver brings the memory card to the office, and the office PC reads the operation data recorded on the memory card. The operation data recorded by the drive recorder by wireless communication may be transmitted to the office PC.

  In addition, instead of performing an operation of analyzing the distance between vehicles based on the operation data recorded on the memory card, the on-board device having the functions of a digital tachograph or a drive recorder, or a smartphone capable of receiving operation data from the on-vehicle device Such a portable terminal may perform the above operation. When the vehicle-mounted device reproduces the operation data after recording, it can be displayed in real time during operation, not after the operation ends. Therefore, the driver can grasp the current degree of danger between vehicles.

  In the above embodiment and its modification, the animation of the inter-vehicle distance information is drawn two-dimensionally (two-dimensionally), but may be drawn to give a sense of perspective (so-called 2.5-dimensional). It may be drawn as a 3D animation.

  In the above embodiment, the image processing unit analyzes the vehicle front image captured by the camera to calculate the inter-vehicle distance to the preceding vehicle. Microwaves may be projected toward the vehicle ahead and the inter-vehicle distance may be obtained from the reflected waves.

  In the above embodiment, the office PC displays the inter-vehicle distance information. However, the drive recorder has the above-described function and display performed by the office PC, and the inter-vehicle distance zone corresponding to the speed of the host vehicle is displayed. You may display continuously like animation. In this case, the drive recorder corresponds to the inter-vehicle information display device.

  Moreover, the portable terminal (smart phone, tablet) possessed by the driver receives the data of the speed and the distance between the own vehicles transmitted from the drive recorder, and the inter-vehicle distance zone corresponding to the speed of the own vehicle is animated. You may make it display on a display continuously. In this case, the mobile terminal corresponds to the inter-vehicle information display device.

Here, the features of the embodiment of the inter-vehicle information display device according to the present invention described above are briefly summarized and listed in the following [1] to [4], respectively.
[1] A speed acquisition unit (speed I / F 12) for acquiring the speed of the host vehicle;
An inter-vehicle distance acquisition unit (camera 16, image processing unit 13) for acquiring an inter-vehicle distance to the preceding vehicle;
A storage unit (memory card 55) for storing the speed of the host vehicle and the distance between the vehicles in time series;
An area setting unit (table 34z) in which an inter-vehicle distance area (danger zone DZ, caution zone AZ, safety zone SZ) corresponding to the speed of the host vehicle is set;
A display unit (display unit 33) for displaying an inter-vehicle distance to the preceding vehicle;
A control unit (CPU 31) that sequentially reads out the speed of the host vehicle stored in time in the storage unit and continuously displays the inter-vehicle distance zone corresponding to the read speed of the host vehicle on the display unit. When,
A vehicle-to-vehicle information display device comprising:
[2] When the front vehicle is in the inter-vehicle distance area, the control unit displays the inter-vehicle distance area. When the front vehicle is not in the inter-vehicle distance area, the control unit is configured to display the inter-vehicle distance. Do not display the area,
The inter-vehicle information display device according to [1], wherein
[3] When the inter-vehicle distance to the preceding vehicle becomes a threshold value or less, the control unit displays the inter-vehicle distance area.
The inter-vehicle information display device according to [1], wherein
[4] A position acquisition unit (GPS_I / F15) for acquiring the position of the host vehicle is provided,
The display unit displays the inter-vehicle distance area centered on the position of the host vehicle on a map.
The inter-vehicle information display device according to any one of [1] to [3].

5 Inter-vehicle distance warning system 10 Drive recorder 11, 31 CPU
12 Speed I / F
13 Image processing unit 14 G sensor (acceleration sensor)
15 GPS_I / F
16 Camera 18 Card I / F
20 Speaker 22 RAM
23, 26 ROM
24 Data processing unit 25 Power supply I / F
30 office PC
33 Display unit 34 Storage unit 34z Table 35 Card I / F
36 Operation unit 37 Output unit 38 Audio I / F
39 Map database (DB)
41 Microphone 45 Printer 55 Memory card 75 Own vehicle icon 78 Forward vehicle icon 81, 82 Vehicle 86 Image imitating road 90 Operation panel 91 Stop button 92 Pause button 93 Play button AZ Caution zone DZ Danger zone GR Graph MA Map SK Seek bar SZ safety zone

Claims (4)

A speed acquisition unit for acquiring the speed of the host vehicle;
An inter-vehicle distance acquisition unit that acquires an inter-vehicle distance to the preceding vehicle;
A storage unit for storing the speed of the host vehicle and the inter-vehicle distance in time series;
An area setting unit in which an inter-vehicle distance area corresponding to the speed of the host vehicle is set in advance;
A display unit for displaying an inter-vehicle distance to the preceding vehicle;
Control for performing animation display in which the speed of the host vehicle stored in time series in the storage unit is sequentially read and the inter-vehicle distance zone corresponding to the read speed of the host vehicle is continuously displayed on the display unit. And
Equipped with a,
The controller is
Based on the speed of the host vehicle and the data of the inter-vehicle distance stored in time series in the storage unit, a speed graph that represents the time change of the speed of the host vehicle and an inter-vehicle distance graph that represents the time change of the inter-vehicle distance are created. The speed graph and the inter-vehicle distance graph are displayed on a first screen in the display unit together with a seek bar that can be moved in the time axis direction while straddling the speed graph and the inter-vehicle distance graph. An inter-vehicle information display device that displays the speed of the host vehicle and the inter-vehicle distance to be indicated on a second screen in the display unit, and then displays the animation when an animation instruction is given . When the front vehicle is in the inter-vehicle distance area, the control unit displays the inter-vehicle distance area, and when there is no front vehicle in the inter-vehicle distance area, the control unit displays the inter-vehicle distance area. Do not let,
The inter-vehicle information display device according to claim 1. When the inter-vehicle distance to the preceding vehicle becomes a threshold value or less, the control unit displays the inter-vehicle distance area.
The inter-vehicle information display device according to claim 1. A position acquisition unit for acquiring the position of the host vehicle;
The display unit displays the inter-vehicle distance area centered on the position of the host vehicle on a map.
The inter-vehicle information display device according to any one of claims 1 to 3.

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