WO2018036232A1 - Vehicle-mounted front and rear image driving recorder system - Google Patents
Vehicle-mounted front and rear image driving recorder system Download PDFInfo
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- WO2018036232A1 WO2018036232A1 PCT/CN2017/085820 CN2017085820W WO2018036232A1 WO 2018036232 A1 WO2018036232 A1 WO 2018036232A1 CN 2017085820 W CN2017085820 W CN 2017085820W WO 2018036232 A1 WO2018036232 A1 WO 2018036232A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Figure 1 is a block diagram of the utility model
- FIG. 2 is a schematic diagram of the external interface circuit 6 of the present invention.
- FIG. 3 is a schematic diagram of the MCU control circuit 1 of the present invention.
- FIG. 5 is a schematic diagram of the DVR control power supply circuit 10 of the present invention.
- FIG. 6 is a schematic diagram of the power control circuit 9 of the present invention.
- FIG. 7 is a schematic diagram of the DIP switch circuit 8 of the present invention.
- FIG. 8 is a schematic diagram of the video channel selection circuit 11 of the present invention.
- FIG. 9 is a schematic diagram of a video decoding circuit 4 of the present invention.
- 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.
- 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.
- 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.
- 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 pin 2, 6, 11, 12, 19, 20 is grounded, and the number 3 is grounded.
- 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
- FIG. 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.
- 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.
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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
本实用新型涉及车载前后影像行车记录系统,具体地说是一种画像清晰,响应快捷、操作方便、安全的行车记录系统。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.
行车记录仪即记录车辆行驶途中的影像及声音等相关资讯的仪器。安装行车记录仪后,能够记录汽车行驶全过程的视频图像和声音,可为交通事故提供证据。喜欢自驾游的人,还可以用它来记录征服艰难险阻的过程。开车时边走边录像,同时把时间、速度、所在位置都记录在录像里,相当“黑匣子”。也可在家用作DV拍摄生活乐趣,或者作为家用监控使用。平时还可以做停车监控,安装行车记录仪,视频资料不可以裁剪,如果裁剪,在责任事故发生后则无法提供帮助。也是为了防止现在社会那些不可避免的碰瓷行为,但市场上的行车记录仪在实际应用中还存在着响应速度慢、画质偏低、操作不灵活等缺点。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.
实用新型内容Utility model content
本实用新型的目的是提供车载前后影像行车记录系统,它能在高响应速度下保持高清画质进行录像写入,而后操作灵活方便、系统安全可靠,为自驾游喜好人群提供高质量的行车记录保障。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.
本实用新型的技术解决方案是在MCU控制电路1,內置DVR电路2,车载视频模块3,视频解码电路4,前视摄像头5,外部接口电路6,外置DVR7,拨码开关电路8,电源控制电路9,DVR电源
控制电路10,视频通道选择电路11基础上,其特点是CAN信号传输到MCU控制电路1的车辆状态信号接收端,向MCU控制电路1传输车辆挡位状态信号,MCU控制电路1的视频切换信号输出端与视频通道选择电路11的切换信号输入端相连接,向视频通道选择电路11传输视频切换信号;外部接口电路6的视频信号输出端与视频解码电路4和视频通道选择电路11的视频信号输入端相连接;向视频解码电路4和视频通道选择电路11传输视频信号;视频解码电路4的BT656视频信号输出端与内置DVR电路2的BT656视频信号输入端相连接,向内置DVR电路2传输转换后的BT656视频信号,内置DVR电路2的CVBS复合视频信号输出端与视频通道选择电路11的CVBS复合视频信号输入端相连接,向视频通道选择电路11传输CVBS复合视频信号。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.
以上所述的MCU控制电路1中单片机U5的型号为STM32F103C8T6,MCU控制电路1的单片机U5的45脚和46脚为车辆状态信号接收端,单片机U5的28、29脚为视频切换信号输出端;视频通道选择电路11中IC芯片U1的型号为M3366,IC芯片U1的2脚和4脚为切换信号输入端;IC芯片U1的1脚和3脚为视频信号输入端,IC芯片U1的5脚为CVBS复合视频信号输入端;外部接口电路6的接插件P1的型号为Header10X2,接插件P2的型号为Header7X2,接插件P1的15脚和16脚为视频信号输出端;视频解码电路4中IC芯片U7的型号为TYP5150,IC芯片U7的1脚和2脚为视频信号输入端,IC芯片U7的11脚和18脚为BT656视频信号
输出端;内置DVR电路2中IC芯片U8的型号为MSN-200,IC芯片U8的21、22、23、24、25、31、33、36为BT656视频信号输入端,IC芯片U8的99脚为CVBS复合视频信号输出端。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.
本实用新型的工作原理是上电硬件自检,包括检测是否有原车CAN信号、拨码开关选择的车型,该系统使原车屏默认显示原车自带前置摄像头的画面并记录该影像;8秒后该系统使内置和外置DVR的时间与原车的时间同步;挂R档时,该系统实时无缝切换到原车自带的后置摄像头的画面并记录该影像,P档或其它档位又切回到原车自带前置摄像头的画面并记录该影像;P档且P键使能时,长按方向盘的”*”键的次数三次内可以在内置DVR、外置DVR和前置摄像头的画面随时切换;根据串口协议,并在该系统解析了方向盘控键的CAN数据之下,使用串口来操作内置或外置的DVR。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.
本实用新型的优点是在原车前后视的基础上,支持外置的DVR行车记录仪;更兼有时间同步的功能,可以清楚知道该影像记录的时间,还可以通过方向盘控键随意对DVR进行操作,系统安全可靠。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.
图1是本实用新型的方框结构示意图;Figure 1 is a block diagram of the utility model;
图2是本实用新型的外部接口电路6原理图;2 is a schematic diagram of the external interface circuit 6 of the present invention;
图3是本实用新型的MCU控制电路1原理图;3 is a schematic diagram of the MCU control circuit 1 of the present invention;
图4是本实用新型的内置DVR电路2原理图;4 is a schematic diagram of the built-in DVR circuit 2 of the present invention;
图5是本实用新型的DVR控制电源电路10原理图;Figure 5 is a schematic diagram of the DVR control power supply circuit 10 of the present invention;
图6是本实用新型的电源控制电路9原理图;
Figure 6 is a schematic diagram of the power control circuit 9 of the present invention;
图7是本实用新型的拨码开关电路8原理图;Figure 7 is a schematic diagram of the DIP switch circuit 8 of the present invention;
图8是本实用新型的视频通道选择电路11原理图;Figure 8 is a schematic diagram of the video channel selection circuit 11 of the present invention;
图9是本实用新型的视频解码电路4原理图。9 is a schematic diagram of a video decoding circuit 4 of the present invention.
根据图1、图2、图3、图4、图5、图6、图7、图8、图9所示,本实用新型在MCU控制电路1,內置DVR电路2,车载视频模块3,视频解码电路4,前视摄像头5,外部接口电路6,外置DVR7,拨码开关电路8,电源控制电路9,DVR电源控制电路10,视频通道选择电路11的基础上,其特点是CAN信号传输到MCU控制电路1的车辆状态信号接收端,向MCU控制电路1传输车辆挡位状态信号,MCU控制电路1的视频切换信号输出端与视频通道选择电路11的切换信号输入端相连接,向视频通道选择电路11传输视频切换信号;外部接口电路6的视频信号输出端与视频解码电路4和视频通道选择电路11的视频信号输入端相连接;向视频解码电路4和视频通道选择电路11传输视频信号;视频解码电路4的BT656视频信号输出端与内置DVR电路2的BT656视频信号输入端相连接,向内置DVR电路2传输转换后的BT656视频信号,内置DVR电路2的CVBS复合视频信号输出端与视频通道选择电路11的CVBS复合视频信号输入端相连接,向视频通道选择电路11传输CVBS复合视频信号。所述的MCU控制电路1中单片机U5的型号为STM32F103C8T6,MCU控制电路1的单片机U5的45脚和46脚为车辆状态信号接收端,单片机U5的28、29脚为视频切换信号输出端;视频通道选择电路11中
IC芯片U1的型号为M3366,IC芯片U1的2脚和4脚为切换信号输入端;IC芯片U1的1脚和3脚为视频信号输入端,IC芯片U1的5脚为CVBS复合视频信号输入端;外部接口电路6的接插件P1的型号为Header10X2,接插件P2的型号为Header7X2,接插件P1的15脚和16脚为视频信号输出端;视频解码电路4中IC芯片U7的型号为TYP5150,IC芯片U7的1脚和2脚为视频信号输入端,IC芯片U7的11脚和18脚为BT656视频信号输出端;内置DVR电路2中IC芯片U8的型号为MSN-200,IC芯片U8的21、22、23、24、25、31、33、36为BT656视频信号输入端,IC芯片U8的99脚为CVBS复合视频信号输出端。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.
如图2外部接口电路6原理图,接插件P1的1号管脚接电源的正极,4号管脚接一常电,2、6、11、12、19、20号管脚接地,3号和5号管脚分别接CAN1的高电平和低电平,7号管脚接倒挡检测信号,8号管脚接12V的输出,9号和10号分别接串口的TX和RX端,13号管脚接CVBS输出6,15号管脚接收拾输入5,16号管脚接前视摄像头5或者外置DVR7,17、18号管脚接的是给5V摄像头供电的ACC。接插件P2的1号管脚接的是常电,3号管脚接的是12V的电源ACC,2、5、9、13、14号管脚接地,4、6、8号管脚分别接12V输出1、2、3,7号管脚接倒挡信号检测,10号管脚接前视摄像头5或者外置DVR7,11和12号管脚分别接麦克风的正负极。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 pin 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.
如图3所示为MCU控制电路1原理图,单片机U5是STM32F103C8T6,它主要是接收CAN13的数据,12和13管脚的DVR_UART2_TX和
DVR_UART2_RX和内置DVR12互相收发数据,同时判断拨码开关13的状态。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.
如图4所示为内置DVR电路2电路原理图,是由内置DVR电路2的核心板芯片U8控制的电路,它的84和83管脚与MCU控制电路1的13和12号管脚相连,同样是实现数据的发送和接收。它的33、25、24、23、31、36、21、22号管脚分别与TVP5150电路的11到18号管脚相连处理经转换后的视频信号,由99号管脚TV_CVBS输出,TV_CVBS由电路转换后变成DVR_CVBS_OUT输出给视频通道选择电路11的5号管脚。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.
如图5所示为本实用新型的DVR电源控制电路10原理图,该模块分为3个部分。其一是由常电转换为3.3V的电压,由转换后的3.3V的电压控制内置DVR电路2;其二是电源控制电路14由12V的ACC转换后的5V电压经电感L16转换成为PWR控制电压,分别转换成DVR_1.8V和DVR_1.3V的电压给内置DVR电路2用;其三是由STM32控制转换成DVR_3.3V给内置DVR电路2用。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.
如图6所示为本实用新型的电源控制电路9原理图,该模块分为两个部分。其一是由芯片9435控制将常电电压转换为12V的VCC,再通过芯片AP1509将电压转换为5V的VCC;其二是通过芯片AM1117-3.3将5V的VCC转换为3.3V的VCC。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.
如图8所示为本实用新型的视频通道选择电路11原理图,该模块接收由外部接口电路6前视通道CAM_FV、后视通道CAM_RV以及内置DVR电路2的视频通道DVR_CVBS_OUT经过视频通道选择电路11处理,
选择其中一个视频通道给CVBS输出7。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.
如图9所示为本实用新型的视频解码电路4原理图该模块主要分为两个部分。是由芯片TVP5150控制的电路,TVP5150是超低功耗、支持NTSC/PAL/SECAM等格式的高性能视频解码器芯片。该芯片的1号和2号管脚接收由外部接口6前视通道CAM_FV、后视通道CAM_RV,这两个视频信号通过加滤波网络使原始信号不受外界的干扰而丢失任何信息,CAM_FV端的滤波网是由电容C44、C45,电阻R51、R48,电感L10组成,CAM_RV端的滤波网是由电容C48、C49,电阻R57、R56,电感L11组成,通过视频解码器芯片转换成其它信号后由11、12、13、14、15、16、17和18号管脚输出给内置DVR电路2处理。21和22号管脚的SN_SCL和SN_SDA与内置DVR电路2的核心板芯片U8的17和19号管脚相连,实现数据的发送和接收。
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 (2)
- 车载前后影像行车记录系统,它包括MCU控制电路(1),內置DVR电路(2),车载视频模块(3),视频解码电路(4),前视摄像头(5),外部接口电路(6),外置DVR(7),拨码开关电路(8),电源控制电路(9),DVR电源控制电路(10),视频通道选择电路(11),其特征是CAN信号传输到MCU控制电路(1)的车辆状态信号接收端,向MCU控制电路(1)传输车辆挡位状态信号,MCU控制电路(1)的视频切换信号输出端与视频通道选择电路(11)的切换信号输入端相连接,向视频通道选择电路(11)传输视频切换信号;外部接口电路(6)的视频信号输出端与视频解码电路(4)和视频通道选择电路(11)的视频信号输入端相连接;向视频解码电路(4)和视频通道选择电路(11)传输视频信号;视频解码电路(4)的BT656视频信号输出端与内置DVR电路(2)的BT656视频信号输入端相连接,向内置DVR电路(2)传输转换后的BT656视频信号,内置DVR电路(2)的CVBS复合视频信号输出端与视频通道选择电路(11)的CVBS复合视频信号输入端相连接,向视频通道选择电路(11)传输CVBS复合视频信号。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.
- 根据权利要求1所述的车载前后影像行车记录系统,其特征是所述的MCU控制电路(1)中单片机U5的型号为STM32F103C8T6,MCU控制电路(1)的单片机U5的45脚和46脚为车辆状态信号接收端,单片机U5的28、29脚为视频切换信号输出端;视频通道选择电路(11)中IC芯片U1的型号为M3366,IC芯片U1的2脚和4脚为切换信号输入端;IC芯片U1的1脚和3脚为视频信号输入端, IC芯片U1的5脚为CVBS复合视频信号输入端;外部接口电路(6)的接插件P1的型号为Header10X2,接插件P2的型号为Header7X2,接插件P1的15脚和16脚为视频信号输出端;视频解码电路(4)中IC芯片U7的型号为TYP5150,IC芯片U7的1脚和2脚为视频信号输入端,IC芯片U7的11脚和18脚为BT656视频信号输出端;内置DVR电路(2)中IC芯片U8的型号为MSN-200,IC芯片U8的21、22、23、24、25、31、33、36为BT656视频信号输入端,IC芯片U8的99脚为CVBS复合视频信号输出端。 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.
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CN117939040A (en) * | 2024-03-19 | 2024-04-26 | 智道网联科技(北京)有限公司 | Vehicle-mounted monitoring circuit, vehicle and switching method |
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