WO2018036232A1

WO2018036232A1 - Vehicle-mounted front and rear image driving recorder system

Info

Publication number: WO2018036232A1
Application number: PCT/CN2017/085820
Authority: WO
Inventors: 曾宪玮
Original assignee: 广州路派电子科技有限公司
Priority date: 2016-08-26
Filing date: 2017-05-25
Publication date: 2018-03-01
Also published as: CN206023944U

Abstract

The present utility model relates to a vehicle-mounted front and rear image driving recorder system, for use in driving recording of a vehicle. A CAN signal is transmitted to an MCU control circuit 1. A video switching signal output end of the MCU control circuit 1 is connected to a switching signal input end of a video channel selection circuit 11. A video signal output end of an external interface circuit 6 is connected to video signal input ends of a video decoding circuit 4 and the video channel selection circuit 11. A BT656 video signal output end of the video decoding circuit 4 is connected to a BT656 video signal input end of a built-in DVR circuit 2. A composite video broadcast signal (CVBS) output end of the internal DVR circuit 2 is connected to a CVBS input end of the video channel selection circuit 11. The present utility model supports an external DVR driving recorder. Due to a time synchronization function, the image recording time is clear. A DVR can be operated freely by means of a steering wheel control key, and the system is safe and reliable.

Description

Vehicle front and rear image driving record system

Technical field

The utility model relates to a vehicle front and rear image driving recording system, in particular to a driving record system with clear portrait, fast response, convenient operation and safety.

Background technique

The driving recorder is an instrument that records information such as images and sounds while the vehicle is in motion. After installing the driving recorder, it can record the video images and sounds of the whole process of the car, which can provide evidence for traffic accidents. People who like to travel by car can also use it to record the process of conquering difficulties and obstacles. While driving, while recording, while recording the time, speed, and location in the video, it is quite a "black box." It can also be used as a DV shooting life at home or as a home monitor. Usually you can also do parking monitoring, install driving recorder, video data can not be cut, if cutting, after the liability accident can not help. It is also to prevent the inevitable impact of porcelain in the current society, but in the actual application of the driving recorder on the market, there are still shortcomings such as slow response, low image quality and inflexible operation.

Utility model content

The purpose of the utility model is to provide a vehicle front and rear image driving recording system, which can maintain high-definition image quality for recording and writing under high response speed, and then the operation is flexible and convenient, the system is safe and reliable, and provides high-quality driving records for self-driving people. Guarantee.

The technical solution of the utility model is in MCU control circuit 1, built-in DVR circuit 2, vehicle video module 3, video decoding circuit 4, front view camera 5, external interface circuit 6, external DVR7, dial switch circuit 8, power supply Control circuit 9, DVR power supply The control circuit 10 and the video channel selection circuit 11 are characterized in that the CAN signal is transmitted to the vehicle state signal receiving end of the MCU control circuit 1, and the vehicle gear state signal is transmitted to the MCU control circuit 1, and the video switching signal of the MCU control circuit 1 is transmitted. The output end is connected to the switching signal input end of the video channel selecting circuit 11, and transmits a video switching signal to the video channel selecting circuit 11; the video signal output end of the external interface circuit 6 and the video signal of the video decoding circuit 4 and the video channel selecting circuit 11 The input end is connected; the video signal is transmitted to the video decoding circuit 4 and the video channel selection circuit 11; the BT656 video signal output end of the video decoding circuit 4 is connected to the BT656 video signal input end of the built-in DVR circuit 2, and is transmitted to the built-in DVR circuit 2 The converted BT656 video signal, the CVBS composite video signal output end of the built-in DVR circuit 2 is connected to the CVBS composite video signal input end of the video channel selection circuit 11, and transmits the CVBS composite video signal to the video channel selection circuit 11.

In the MCU control circuit 1 described above, the model of the single-chip U5 is STM32F103C8T6, the 45-pin and 46-pin of the single-chip U5 of the MCU control circuit 1 are the vehicle state signal receiving end, and the 28 and 29 feet of the single-chip U5 are the video switching signal output end; The model of the IC chip U1 in the video channel selection circuit 11 is M3366, and the 2 pin and the 4 pin of the IC chip U1 are the switching signal input terminals; the 1 pin and the 3 pin of the IC chip U1 are the video signal input terminals, and the 5 pins of the IC chip U1. It is the CVBS composite video signal input terminal; the external interface circuit 6 connector P1 is model Header10X2, the connector P2 is model Header7X2, the

connector P1 pins

15 and 16 are video signal output terminals; the video decoding circuit 4 is IC The model of the chip U7 is TYP5150, the 1st and 2nd pins of the IC chip U7 are the video signal input terminals, and the 11th and 18th pins of the IC chip U7 are the BT656 video signals. Output; built-in DVR circuit 2 IC chip U8 model is MSN-200,

IC chip U8

21, 22, 23, 24, 25, 31, 33, 36 is BT656 video signal input terminal, IC chip U8 99 pin It is the CVBS composite video signal output.

The working principle of the utility model is self-checking of the power-on hardware, including detecting whether there is a vehicle with the original car CAN signal and the dial switch selected. The system causes the original car screen to display the original car with the front camera and record the image by default. After 8 seconds, the system synchronizes the time of the built-in and external DVR with the time of the original car; when the R-range is hung, the system seamlessly switches to the picture of the rear camera that comes with the original car in real time and records the image, P file Or other gears are cut back to the original car with the front camera screen and record the image; P and P button enable, long press the "*" button of the steering wheel within three times in the built-in DVR, external The screen of the DVR and the front camera is switched at any time; according to the serial port protocol, and under the CAN data of the system that resolves the steering wheel control key, the serial port is used to operate the built-in or external DVR.

The utility model has the advantages that the external DVR driving recorder is supported on the basis of the original car front and rear view; and the time synchronization function is also provided, the time of the image recording can be clearly known, and the DVR can be freely performed through the steering wheel control button. Operation, the system is safe and reliable.

DRAWINGS

Figure 1 is a block diagram of the utility model;

2 is a schematic diagram of the external interface circuit 6 of the present invention;

3 is a schematic diagram of the MCU control circuit 1 of the present invention;

4 is a schematic diagram of the built-in DVR circuit 2 of the present invention;

Figure 5 is a schematic diagram of the DVR control power supply circuit 10 of the present invention;

Figure 6 is a schematic diagram of the power control circuit 9 of the present invention;

Figure 7 is a schematic diagram of the DIP switch circuit 8 of the present invention;

Figure 8 is a schematic diagram of the video channel selection circuit 11 of the present invention;

9 is a schematic diagram of a video decoding circuit 4 of the present invention.

detailed description

According to FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9, the utility model has an MCU control circuit 1, a built-in DVR circuit 2, a car video module 3, and a video. The decoding circuit 4, the front view camera 5, the external interface circuit 6, the external DVR 7, the DIP switch circuit 8, the power control circuit 9, the DVR power control circuit 10, and the video channel selection circuit 11 are characterized by CAN signal transmission. To the vehicle state signal receiving end of the MCU control circuit 1, the vehicle gear state signal is transmitted to the MCU control circuit 1, and the video switching signal output end of the MCU control circuit 1 is connected to the switching signal input end of the video channel selecting circuit 11 to the video. The channel selection circuit 11 transmits a video switching signal; the video signal output terminal of the external interface circuit 6 is connected to the video signal input terminal of the video decoding circuit 4 and the video channel selection circuit 11; and the video is transmitted to the video decoding circuit 4 and the video channel selection circuit 11. The BT656 video signal output end of the video decoding circuit 4 is connected to the BT656 video signal input end of the built-in DVR circuit 2, and transmits the converted BT656 video signal to the built-in DVR circuit 2. , CVBS 2 circuit built DVR composite video signal output terminal of the video channel composite video signal CVBS selection circuit connected to the input 11 of the selection circuit 11 to transmit a composite video signal CVBS video channel. In the MCU control circuit 1, the model of the single-chip U5 is STM32F103C8T6, the 45-pin and 46-pin of the single-chip U5 of the MCU control circuit 1 are the vehicle state signal receiving end, and the 28 and 29 feet of the single-chip U5 are the video switching signal output end; Channel selection circuit 11 The model of the IC chip U1 is M3366, the 2 pin and the 4 pin of the IC chip U1 are the switching signal input terminals; the 1 pin and the 3 pin of the IC chip U1 are the video signal input terminals, and the 5 pins of the IC chip U1 are the CVBS composite video signal input. The connector P1 of the external interface circuit 6 is of the type of Header 10X2, the model of the connector P2 is Header7X2, the

pins

15 and 16 of the connector P1 are the video signal output terminals, and the model of the IC chip U7 of the video decoding circuit 4 is TYP5150. 1 and 2 pins of IC chip U7 are video signal input terminals, 11 pins and 18 pins of IC chip U7 are BT656 video signal output terminals; built-in DVR circuit 2 IC chip U8 is model MSN-200,

IC chip U8

21, 22, 23, 24, 25, 31, 33, 36 are BT656 video signal input terminals, and 99 pins of IC chip U8 are CVBS composite video signal output terminals.

As shown in the schematic diagram of the external interface circuit 6 of Figure 2, the pin 1 of the connector P1 is connected to the positive pole of the power supply, the pin 4 is connected to a constant current, and the

2, 6, 11, 12, 19, 20 is grounded, and the number 3 is grounded. And the 5th pin is connected to the high level and the low level of CAN1 respectively, the 7th pin is connected to the reverse gear detection signal, the 8th pin is connected to the 12V output, and the 9th and the 10th are respectively connected to the TX and RX terminals of the serial port, 13 The pin is connected to the CVBS output 6, the 15th pin receives the pickup input 5, the 16th pin is connected to the front camera 5 or the external DVR7, and the 17th and 18th pins are connected to the ACC that supplies the 5V camera. The pin 1 of the connector P2 is connected to the normal power, the pin 3 is connected to the 12V power supply ACC, the

pins

2, 5, 9, 13, and 14 are grounded, and the 4th, 6th, and 8th pins are respectively connected. The

12V output pins

1, 2, 3, and 7 are connected to the reverse gear signal detection. The 10th pin is connected to the front camera 5 or the external DVR7, and the 11th and 12th pins are respectively connected to the positive and negative terminals of the microphone.

Figure 3 shows the schematic diagram of the MCU control circuit 1. The microcontroller U5 is STM32F103C8T6, which mainly receives the data of CAN13, DVR_UART2_TX of 12 and 13 pins and The DVR_UART2_RX and the built-in DVR 12 transmit and receive data to each other and determine the state of the DIP switch 13.

As shown in FIG. 4, the circuit diagram of the built-in DVR circuit 2 is a circuit controlled by the core board chip U8 of the built-in DVR circuit 2, and its 84 and 83 pins are connected to the

pins

13 and 12 of the MCU control circuit 1. The same is to achieve the transmission and reception of data. Its 33, 25, 24, 23, 31, 36, 21, and 22 pins are connected to the 11 to 18 pins of the TVP5150 circuit to process the converted video signal, which is output by the 99th pin TV_CVBS, TV_CVBS is After the circuit is switched, it becomes DVR_CVBS_OUT output to the No. 5 pin of the video channel selection circuit 11.

FIG. 5 is a schematic diagram of the DVR power supply control circuit 10 of the present invention, and the module is divided into three parts. The first is to convert the constant current into a voltage of 3.3V, and the built-in DVR circuit 2 is controlled by the converted 3.3V voltage. The second is that the power supply control circuit 14 is converted from the 15V ACC converted 5V voltage to the PWR control via the inductor L16. The voltage is converted into the DVR_1.8V and DVR_1.3V voltages for the built-in DVR circuit 2; the third is converted to DVR_3.3V by the STM32 control to the built-in DVR circuit 2.

FIG. 6 is a schematic diagram of the power control circuit 9 of the present invention, and the module is divided into two parts. The first is that the chip 9435 controls the conversion of the normal voltage to 12V VCC, and then converts the voltage to 5V VCC through the chip AP1509; the second is to convert the 5V VCC to the 3.3V VCC through the chip AM1117-3.3.

FIG. 8 is a schematic diagram of the video channel selection circuit 11 of the present invention. The module receives the video channel DVR_CVBS_OUT through the video channel selection circuit 11 by the external interface circuit 6 forward channel CAM_FV, rear view channel CAM_RV, and built-in DVR circuit 2. deal with, Select one of the video channels to output 7 to the CVBS.

FIG. 9 is a schematic diagram of the video decoding circuit 4 of the present invention. The module is mainly divided into two parts. It is a circuit controlled by the chip TVP5150. The TVP5150 is a high-performance video decoder chip with ultra-low power consumption and support for NTSC/PAL/SECAM. The

pins

1 and 2 of the chip receive the front view channel CAM_FV and the rear view channel CAM_RV from the external interface 6. These two video signals lose any information by adding the filtering network to the original signal without external interference, and the filtering of the CAM_FV end The net is composed of capacitors C44, C45, resistors R51, R48, and inductor L10. The filter network of CAM_RV is composed of capacitors C48, C49, resistors R57, R56, and inductor L11. After being converted into other signals by the video decoder chip, Pins 12, 13, 14, 15, 16, 17, and 18 are output to the built-in DVR circuit 2. The SN_SCL and SN_SDA of pins 21 and 22 are connected to

pins

17 and 19 of the core board chip U8 of the built-in DVR circuit 2 to realize data transmission and reception.

Claims

Car front and rear image driving recording system, including MCU control circuit (1), built-in DVR circuit (2), car video module (3), video decoding circuit (4), front view camera (5), external interface circuit (6) , external DVR (7), DIP switch circuit (8), power control circuit (9), DVR power control circuit (10), video channel selection circuit (11), which is characterized by CAN signal transmission to MCU control circuit ( 1) The vehicle status signal receiving end transmits a vehicle gear status signal to the MCU control circuit (1), and the video switching signal output end of the MCU control circuit (1) is connected to the switching signal input end of the video channel selection circuit (11) a video switching signal is transmitted to the video channel selection circuit (11); the video signal output end of the external interface circuit (6) is connected to the video signal input end of the video decoding circuit (4) and the video channel selection circuit (11); The decoding circuit (4) and the video channel selection circuit (11) transmit the video signal; the BT656 video signal output end of the video decoding circuit (4) is connected to the BT656 video signal input end of the built-in DVR circuit (2) to the built-in DVR circuit ( 2) Transfer the converted BT656 video signal, inside DVR circuit (2) of the composite video signal CVBS video output terminal channel selection circuit (11) of the composite video signal CVBS connected to the input, the selection circuit (11) to transmit a composite video signal CVBS video channel.
The vehicle-mounted front and rear image driving recording system according to claim 1, wherein the MCU control circuit (1) has a single-chip U5 model STM32F103C8T6, and the MCU control circuit (1) has a 45-pin and a 46-foot half-chip U5. The vehicle status signal receiving end, the 28 and 29 feet of the single chip U5 are the video switching signal output end; the model of the IC chip U1 in the video channel selecting circuit (11) is M3366, and the 2 pin and the 4 pin of the IC chip U1 are the switching signal input end. 1 pin and pin 3 of IC chip U1 are video signal input terminals. The 5th pin of the IC chip U1 is the CVBS composite video signal input terminal; the connector P1 of the external interface circuit (6) is Header10X2, the connector P2 is Header7X2, and the 15th and 16th pins of the connector P1 are the video signal output. The video decoding circuit (4) IC chip U7 model is TYP5150, IC chip U7 1 pin and 2 pin are video signal input terminals, IC chip U7 11 pin and 18 pin are BT656 video signal output terminal; built-in DVR In the circuit (2), the IC chip U8 is model MSN-200, the IC chip U8 21, 22, 23, 24, 25, 31, 33, 36 is the BT656 video signal input terminal, and the IC chip U8 99 pin is the CVBS composite. Video signal output.