CN203149680U

CN203149680U - Vehicle traveling data recorder

Info

Publication number: CN203149680U
Application number: CN 201320015528
Authority: CN
Inventors: 张德兆; 杨波
Original assignee: Individual
Current assignee: Beijing Idriverplus Technologies Co Ltd
Priority date: 2013-01-11
Filing date: 2013-01-11
Publication date: 2013-08-21
Anticipated expiration: 2023-01-11

Abstract

The utility model relates to a vehicle traveling data recorder comprising a camera, a GPS (Global Position System) antenna, a host machine, a vehicle-mounted CAN (Controller Area Network) bus, a memorizer and a display and also comprising a radar arranged at the head of a self-vehicle and a sounding horn arranged near the display, wherein the radar is used for detecting the distance and speed of a front vehicle relative to the self-vehicle and sending the distance and speed to the host machine through a CAN interface; and the host machine is used for calculating the anti-corrosion safety distance of the self-vehicle according to the distance and speed of the front vehicle relative to the self-vehicle and comparing the anti-corrosion safety distance of the self-vehicle with the distance of the front vehicle relative to the self-vehicle, if collision possibly occurs, an early warning signal is respectively sent to the display and the sounding horn by the host machine to prompt, meanwhile, the output data of the radar and the output data of the camera are sent to the display by the host machine so as to be displayed, and in addition, the output data of the radar, the output data of the camera, the output data of the GPS antenna and the output data of the vehicle-mounted CAN bus are sent to the memorizer by the host machine through an SPI (Serial Peripheral Interface) so as to be stored and recorded.

Description

Drive recorder

Technical field

The utility model relates to a kind of automotive safety supervising device, particularly about hit the drive recorder of forewarning function before a kind of can the playing before the rear-end collision accident takes place.

Background technology

Traditional drive recorder mainly is divided three classes: the first kind is to be core with the GPS location technology, the store car driving trace; Second class is to be core with the video technique, utilizes in the car in the camera registration of vehicle driving process, the outer image of car and sound; The 3rd class is based on the running state parameter of registration of vehicle own, utilizes onboard sensor or directly obtains and store status informations such as the speed of a motor vehicle by the vehicle-mounted CAN bus.The fundamental purpose that drive recorder is stored above-mentioned information is for the ease of vehicle monitoring management and for the confirmation of responsibility after the accident provides reference frame, but it can not play the purpose of preventing accident and taking place; Data such as the driving trace of its storage simultaneously, image can not be used for judging information such as relative distance from car and front truck, relative velocity after traffic hazard such as knock into the back takes place, thereby whether the driver take measures such as braking to make accurate judgement before can't taking place accident.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of drive recorder, not only can record the various state parameters in the vehicle traveling process, and can record relative distance and relative velocity from car and front truck, hit forewarning function before can also playing before rear-end collision takes place, the accident that effectively prevents takes place.

For achieving the above object, the utility model is taked following technical scheme: a kind of drive recorder, it comprises camera, gps antenna, main frame, the vehicle-mounted CAN bus, storer and display, described camera is surveyed the place ahead image that crosses journey from garage, and described the place ahead image sent to described main frame by a Video Decoder and VPFE interface, described gps antenna is received from car position information in real time, and send to described main frame by the UART interface, described vehicle-mounted CAN bus will send to described main frame by the CAN interface from the transport condition information of car, it is characterized in that: it comprises that also one is arranged on radar and from car headstock position and is arranged near the described display sounding loudspeaker, described radar detection front truck is relatively from distance and the speed of car, and it is sent to described main frame by the CAN interface, described main frame sends early warning signal respectively and points out to described display and sounding loudspeaker, simultaneously described main frame sends to described display with described radar output data and camera output data and shows, and described main frame is exported data with radar, camera output data, gps antenna output data and vehicle-mounted CAN bus output data send to described storer by the SPI interface and carry out stored record.

Described display comprises the video image viewing area, apart from viewing area, front truck viewing area, radar beam viewing area and lane line viewing area.

The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model and existing drive recorder structure are similar, comprise camera, gps antenna, main frame, the vehicle-mounted CAN bus, storer and display, difference is that it comprises that also one is arranged on radar and from car headstock position and is arranged near the display sounding loudspeaker, radar be used for to be surveyed front truck relatively from distance and the speed of car, and it is sent to main frame by the CAN interface, main frame calculates from the crashproof safe distance of car from distance and the speed of car relatively according to front truck, and will compare from the distance of car relatively from the crashproof safe distance of car and front truck, if possible bump, main frame sends early warning signal respectively and points out to display and sounding loudspeaker, therefore hit early warning in the past for the driver by image and two kinds of signals of sound, guarantee driver drives vehicle safety, significantly reduced the generation of car accident.2, in vehicle traveling process, main frame of the present utility model is exported data, camera output data, gps antenna output data and vehicle-mounted CAN bus output data with radar and is sent to storer by the SPI interface and carry out stored record, compared with prior art, drive recorder of the present utility model can carry out stored record to relative distance and the relative velocity from car and front truck, more be conducive to after accident takes place, judge the truth of running car, thereby for judging accurately whether the preceding driver that bumps takes braking to wait measure to produce evidence.The utility model can be widely used in all types of automobiles.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is main machine structure synoptic diagram of the present utility model;

Fig. 3 is display device structure synoptic diagram of the present utility model;

Fig. 4 is host work schematic flow sheet of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail.

As Fig. 1, shown in Figure 2, drive recorder of the present utility model and existing drive recorder structure are basic identical, it comprises the camera 1 that is arranged on front windshield top in the car, be arranged near the gps antenna 2 the control panel board in the automobile, be arranged on the main frame 3 at copilot glove box rear portion, be arranged on the vehicle-mounted CAN bus 4 on each electronic unit node of car load, be arranged on the storer 5 on the main frame 3 and be arranged on the display 6 of controlling instrument top in the automobile, camera 1 is surveyed from garage and is crossed the place ahead image in the journey, and with the place ahead image of picked-up by a Video Decoder 7 and VPFE(Video processing front end) interface sends to main frame 3, gps antenna 2 is received from car position information in real time, and sending to main frame 3 by the UART interface, vehicle-mounted CAN bus 4 will send to main frame 3 by the CAN interface from the transport condition information of car; Characteristics of the present utility model are: it comprises that also a radar 8 and that is arranged on automobile headstock position is arranged near the sounding loudspeaker 9 the display 6, radar 8 is used for surveying front truck relatively from distance and the speed of car, and it is sent to main frame 3 by the CAN interface, main frame 3 calculates from the crashproof safe distance of car from distance and the speed of car relatively according to front truck, and will compare from the distance of car relatively from the crashproof safe distance of car and front truck, if possible bump, main frame 3 sends early warning signal respectively and points out to display 6 and sounding loudspeaker 9, simultaneously main frame 3 sends to display 6 with the data of the data of radar 8 outputs and camera 1 output and shows, and main frame 3 is exported data with radar, camera output data, gps antenna output data and vehicle-mounted CAN bus output data send to storer 5 by the SPI interface and carry out stored record.

In above-described embodiment, as shown in Figure 2, main frame 3 of the present utility model can adopt the dsp chip with high-speed real-time arithmetic capability and special video interface, the model of dsp chip is not restricted, can select according to actual needs, but selected dsp chip need have VPFE interface, CAN interface, UART interface, SPI interface and VPBE interface, and the dsp chip that the main frame 3 of the utility model embodiment adopts is the TMS320DM6437 of TI company.

In the various embodiments described above, as shown in Figure 3, display 6 comprises video image viewing area 61, apart from viewing area 62, front truck viewing area 63 and radar beam viewing area 64.Video image viewing area 61 is used for showing in real time the video image of camera 1 collection, do not having from car the place ahead under the transport condition of car, be in the blank screen state apart from viewing area 62, front truck viewing area 63 and radar beam viewing area 64, when there is vehicle in the place ahead, when display 6 received the radar signal of main frame 3 transmissions by the CAN interface, lighted radar beam viewing area 64, simultaneously, front truck viewing area 63 lights up green, and in the distance viewing area the 62 relative distance values that show from car and front truck; If display 6 receives the early warning signal that main frame 3 sends by the CAN interface, then front truck viewing area 63 lights up redness.For display 6 shows that road is more practical and attractive, can also be provided with the lane line viewing area 65 that always is in illuminating state on the display 6, show route information in real time.

In the various embodiments described above, as shown in Figure 2, Video Decoder 7 of the present utility model is used for that the road video analog signal that camera 1 is exported is converted into digital signal and sends to main frame 3, Video Decoder 7 can adopt the TVP5158 of TI company, also can adopt other type chip according to actual needs, not be restricted at this.

In the various embodiments described above, radar 8 of the present utility model can adopt the Denso77GHz millimetre-wave radar, and the vehicle-mounted length that can adopt other type according to actual needs is not restricted at this apart from radar yet.

In the various embodiments described above, storer 5 of the present utility model can adopt the SD card, also can select according to actual needs, is not restricted at this.

As shown in Figure 4, further specify the course of work of the present utility model below in conjunction with specific embodiment:

1, each device of drive recorder of the present utility model is switched on, and each interface of main frame 3 is carried out initialization.

2, radar 8 survey in the about 150 meters scopes in car the place ahead front truck relatively from car apart from d and relative speed of a motor vehicle v from car _r, and it is sent to main frame 3 by the CAN interface, main frame 3 with front truck relatively from car send to showing apart from viewing area 62 and front truck viewing area 63 of display 6 apart from d by the CAN interface, and it sent to storer 5 by the SPI interface store.

3, main frame 3 calculating are from the anticollision safe distance d of car and front truck _Safe

d_{safe} = v_{r} \times t_{resp} + \frac{v_{r}^{2}}{- {2 a}_{\max}},

In the formula, t _RespBe driver's reaction time, press ISO15623 and recommend, can between 0.4～1.5s, choose; Present embodiment is chosen t _Resp=1s, a _MaxBe the retarded velocity that vehicle can produce after driver's emergency brake, press ISO15623 and recommend, can get a _Max=3.6m/s ²

3, main frame 3 is with actual spacing d and safe distance d _SafeCompare, if actual range d is less than safe distance d _Safe, main frame 3 transmits a signal to display 6 and sounding loudspeaker 9 respectively by the CAN interface, and the front truck viewing area of display 6 lights up redness and points out, and sounding loudspeaker 9 are sounded and are carried out the early warning driver simultaneously; If actual range d is smaller or equal to safe distance d _Safe, directly enter step 4.

4, main frame 3 reads the output image of camera 1 by Video Decoder 7 and VPFE interface, and image is shown by the video viewing area 61 that the VPBE interface exports display 6 to, and image is sent to storer 5 by the SPI interface stores.

5, main frame 3 reads the vehicle location coordinate data of gps antenna 2 output by the UART interface, and the vehicle location coordinate data is sent to storer 5 stores.

6, main frame 3 speed of a motor vehicle of gathering from car by vehicle-mounted CAN bus 4, and the speed of a motor vehicle is sent to storer 5 store.

7, whether main frame 3 is full by SPI interface detection of stored device 5 spaces, if storer 5 spaces are full, then with new data cover time data at most; If storer 5 spaces less than, then directly store; The data of storage comprise: radar output data, camera output data, GPS output data and vehicle-mounted CAN bus output data.

The various embodiments described above only are used for explanation the utility model; wherein the structure of each parts and connected mode etc. all can change to some extent; every equivalents and improvement of carrying out on the basis of technical solutions of the utility model all should do not got rid of outside protection domain of the present utility model.

Claims

1. drive recorder, it comprises camera, gps antenna, main frame, the vehicle-mounted CAN bus, storer and display, described camera is surveyed the place ahead image that crosses journey from garage, and described the place ahead image sent to described main frame by a Video Decoder and VPFE interface, described gps antenna is received from car position information in real time, and send to described main frame by the UART interface, described vehicle-mounted CAN bus will send to described main frame by the CAN interface from the transport condition information of car, it is characterized in that: it comprises that also one is arranged on radar and from car headstock position and is arranged near the described display sounding loudspeaker, described radar detection front truck is relatively from distance and the speed of car, and it is sent to described main frame by the CAN interface, described main frame sends early warning signal respectively and points out to described display and sounding loudspeaker, simultaneously described main frame sends to described display with described radar output data and camera output data and shows, and described main frame is exported data with radar, camera output data, gps antenna output data and vehicle-mounted CAN bus output data send to described storer by the SPI interface and carry out stored record.