CN205510236U - Reverse image accessory system - Google Patents

Abstract

The utility model relates to a reverse image accessory system, it is supplementary to be used for automobile reversing, it discloses former car screen 1, former car LVDS signal 2, LVDS switches and deseriallizer circuit 3, power switching circuit 4, the TW8825 video decoding circuit 5, MCU control circuit 6, dial switch circuit 7, SD card upgrading circuit 8, CAN transceiver circuit 9, SPI the flash circuit 10, JTAG debugs artificial circuit 11, detect control line circuit 12, the DVR and the CVBS signal interface 13 that makes a video recording, 360 the module is reserved signal interface 14 and is constituteed. The utility model has the advantages that it can switch leading high definition DVR and former car back vision at will, when the car owner backs a car the operation, and vision blind area in the time of effectively reducing vehicle operation, easy operation, safety, convenience respond fastly, intelligent during the use moreover.

Description

Reverse image accessory system

Technical field

This utility model relates to simple to operate, conveniently, safely, responds fast, intelligent reverse image auxiliary system during use System.

Background technology

Along with expanding economy, the raising of people's living standard, individual's household economy revenue growth, automobile industry swift and violent Emerging, science and technology is the most progressive, and vehicle price is greatly lowered, and individual's trip automobile gets more and more, and the safety on roadway is more come More by the concern of car owners, life is precious in all, treasures the life of oneself, simultaneously autre vie to be treasured；Do not exceed the speed limit Not overtaking other vehicles, these are all the indispensable quality of driving, but travel such as general: those cross highway pedestrian and by bike, Motorcycle does not has the people that traffic retrains, just in case creating scratching with them, if do not have strong evidence, car owner often treats unjustly Blackmailed.And the reverse image accessory system that runs quickly is possible not only to high definition record driving overall process, it is also possible to reversing is carried out Monitoring, so this system is increasingly welcome by car owner, this utility model can both make car owner very clear to accident responsibility, protects Stay vaild evidence during incident, can allow again traffic police's process accident quick and precisely, build safe and smooth traffic environment.For can be There is provided strong evidence to after there is vehicle accident car owners, allow those lawless persons have no place to hide, also allow car owner relieved simultaneously Driving.Also have and turn especially for car owners, reversing, although be low speed, but due to the limitation in the people visual field, on turning, It is likely in reversing vehicle accident, does not still see the wider region of Chu Houfang only according to vehicle right and left illuminator, as sought Touch porcelain with other automobile when stopping when looking for parking stall, be also to need to avoid, just in case there occurs, it is also desirable to retain evidence, existing on the market Some drive recorder functions are simple, it is impossible to realize the random switching of preposition high definition DVR and vehicle backing backsight, bring also to car owners Inconvenience；This utility model is possible not only to the random switching realizing preposition high definition DVR with former car backsight；Also support compatible 360 panoramas Video signal inputs, and can also show track, had backing track in terms of reversing, and during reversing, sense of direction is more strengthened, visually More eye-catching, safety is higher, more has the function of time synchronized in display concurrently simultaneously, it is clear how this photologging Time；The most convenient part of this utility model is arbitrarily can to operate DVR row with steering wheel control key, and the man-machine interface of science is more Contribute to traffic safety.

Utility model content

The purpose of this utility model is to provide the reverse image accessory system of a kind of intelligence, and it can random switching preamplifier high definition DVR and former car backsight, when car owner carries out car backing operation, can effectively reduce vision dead zone when vehicle uses.

Technical solution of the present utility model is at former car screen 1, former car LVDS signal 2, LVDS switching and deserializer Circuit 3, power-switching circuit 4, video decoding circuit 5, MCU control circuit 6, toggle switch circuit 7, SD card upgrade circuit 8, CAN transceiver circuit 9, SPI-Flash circuit 10, JTAG debugging emulation circuit 11, detects pilot wire circuit 12, DVR and shooting On the basis of CVBS signaling interface 13,360 module preserved signal interface 14, it is characterized in that MCU control circuit 6 detects toggle switch The dial-up state of circuit 7, the LVDS switching signal outfan of MCU control circuit 6 and LVDS switching and the LVDS of deserializer circuits 3 Switching signal input is connected and switches over control signal transmission；LVDS switching and deserializer circuits 3 are by IC chip U1 handle RGB565 signal is converted into serial LVDS differential signal and is connected to the input of former car screen 1 video signal through circuit breaker K1 output again End；In video decoding circuit 5, IC chip U9 carries out inner decoding conversion to the video signal of DVR and shooting CVBS signaling interface 13 RGB565 signal is become to be connected to LVDS switching and the respective input of deserializer circuits 3 from output, through LVDS switching and deserializer Circuit 3 switching output is to former car screen 1 video signal input terminal.

The LVDS holding wire of intercepting described in the utility model be input to LVDS switching and deserializer circuits 3, LVDS switching and In deserializer circuits 3, model is: the chip U1 of MAX9263 is converted into serial LVDS differential signal transmission RGB565 signal and arrives Relay K 1 switch terminal, LVDS switching and deserializer circuits 3 repeat circuit K1 switch former car video signal and video decoding circuit 5 process the video signal after DVR and shooting CVBS signaling interface 13, and LVDS_SEL end is as controlling relay switch-over control signal Input, model in MCU control circuit 6 be: chip U7 pin 11 output of STM32F103C8T6 controls.

Video decoding circuit 5, YN0 described in the utility model, YN1 end is as the CVBS video signal input source of circuit, logical Cross the IC chip U9 that model is TW8825 and carry out inner decoding, be converted into RGB565 signal by IC chip U9 89～102 Pin exports LVDS switching and the input of deserializer circuits 3, is i.e. 49～64 and 1, the 2 foot inputs of IC chip U1； SPI- In Flash circuit 10, IC chip U10 model is that 5～7 feet of MX25L6445 receive in video decoding circuit 5 the 65 of IC chip U9 ～63 pins, to OSD, track picture is read out.

In MCU control circuit 6 described in the utility model, IC chip U7 employing STM32F103C8T6 is as microprocessor, it By crystal oscillation clock circuit, reset circuit, form minimum system；12,13,25,26 feet of IC chip U7 detect as toggle switch Input pin, 11 foot output LVDS_SEL switch display screen video signal, and 15,16,17 feet of IC chip U7 are that SD card SPI leads to Letter interface is connected with in SD card upgrade circuit 8 the 5 of interface P2,7,3, and 32,33 feet of IC chip U7 are as CAN data wire CAN_RX, CAN_TX, I2C_SCL, I2C_SDA, as IIC module pin, 41,21, the 28 of IC chip U7, i.e. AV1_PWRON ～the connection pin that AV3_PWRON is reserved 360 module control interface 14,19 feet of IC chip U7, i.e. CAM_PWRON is for taking the photograph As head controls pin, 22 feet of IC chip U7, i.e. REVERSE_DET is that astern signal detects pin, detection REVERSE_SIG's Input, 27 feet of IC chip U7, i.e. IR_CTRL1 is infrared receiver sensor interface, and LED1, LED2 are red green Optical diode interface.

Operation principle of the present utility model is to be realized the choosing of vehicle by the toggle switch SW1 in toggle switch circuit Selecting, SW2 can be to DVR function selecting, and SW3, to track function selecting, selects backing track, radar track, and SW4 selects to differentiate Rate, supports 800x480,960x480 new C260 Resolutions.One powers on hardware system self-inspection, has included detecting whether former car The vehicle that CAN signal, the signal of forward sight photographic head and toggle switch select, after powering on, red light can be bright, if without in CAN signal System meeting dormancy in about 5 seconds after electricity, whole lamps extinguish；If having CAN signal but Truck type choice is the most right, then red light can be the most normal Bright, if green light can replace 4 seconds interval on and off about 5 seconds forward sight photographic head after the power-up a signal, green light Chang Liang, it The most alternately；If forward sight no signal, green light length is gone out, and replaces afterwards；If having CAN signal and Truck type choice correct, then red light the brightest 3 Starting after Miao alternately that fast blink green light is then according to the signal of forward sight photographic head, if there being signal green light Chang Liang, no signal length is gone out. If there being CAN signal and correct after powering on, then there is forward sight camera signals green light Chang Liang, goes out without then long；If CAN signal is incorrect Alternately interval light on and off in 4 seconds after then going out about 5 seconds with or without the brightest length of forward sight camera signals.Detected by keyboard signal again Whether circuit Central Plains car CAN has data transmission that DVR can be operated by former car side controlled keyboard: P shelves and P key enable Time, by the sliding onto of steering wheel, slide, the operation to preposition DVR of the ok control key.And it is by the operation of gear: when hanging reverse gear, real Time be switched to former car rearview camera picture；During other gear, switch back into again preposition DVR image frame and show, this utility model Use model be the MCU microcomputer of STM32F103C8T6 make that circuitry is more intelligent, response faster, believe between each circuit Number alternately the most smooth.

The utility model has the advantages that it can arbitrarily switching preamplifier high definition DVR and former car backsight, when car owner carries out reversing behaviour When making, can effectively reduce vision dead zone when vehicle uses, and simple to operate, conveniently, safely, respond fast, intelligence during use Energy.

Accompanying drawing explanation

Fig. 1 is principle of work and power frame structure schematic diagram of the present utility model；

Fig. 2 is LVDS switching and deserializer circuits 3 schematic diagram；

Fig. 3 is power-switching circuit 4 schematic diagram of the present utility model；

Fig. 4 is video decoding circuit 5 schematic diagram of the present utility model；

MCU control circuit 6 schematic diagram of Fig. 5 utility model；

Fig. 6 is toggle switch circuit 7 schematic diagram of the present utility model；

Fig. 7 is CAN transceiver circuit 9 schematic diagram of the present utility model；

Fig. 8 is SD card upgrade circuit 8 schematic diagram of the present utility model；

Fig. 9 is JTAG debugging emulation circuit 11 schematic diagram of the present utility model；

Figure 10 is SPI-FLASH circuit 10 schematic diagram of the present utility model；

Figure 11 is detection pilot wire circuit 12 schematic diagram of the present utility model.

Detailed description of the invention

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, this utility model is by former Car screen 1, former car LVDS signal 2, LVDS switching and deserializer circuits 3, power-switching circuit 4, video decoding circuit 5, MCU is controlled Circuit 6 processed, toggle switch circuit 7, SD card upgrade circuit 8, CAN transceiver circuit 9, SPI-Flash circuit 10, JTAG debugging is imitative True circuit 11, detects pilot wire circuit 12, DVR and shooting CVBS signaling interface 13,360 module preserved signal interface 14, these Module is formed, and is characterized in that MCU control circuit 6 detects the dial-up state of toggle switch circuit 7, the LVDS of MCU control circuit 6 Switching signal outfan is connected with the LVDS switching signal input of LVDS switching and deserializer circuits 3 and switches over control letter Number transmission；LVDS switching and deserializer circuits 3 are converted into serial LVDS differential signal again by IC chip U1 RGB565 signal It is connected to former car screen 1 video signal input terminal through circuit breaker K1 output；In video decoding circuit 5, IC chip U9 to DVR and takes the photograph As the video signal of CVBS signaling interface 13 carry out inner decoding be converted into RGB565 signal from output be connected to LVDS switching and The respective input of deserializer circuits 3, defeated to former car screen 1 video signal through LVDS switching and deserializer circuits 3 switching output Enter end.Its Central Plains car LVDS signal is to be exported by former car, simply intercepts LVDS holding wire and is input to LVDS switching and deserializer electricity Road 3, LVDS module effect has two, as shown in Figure 2；First is switched by LVDS and in deserializer circuits 3, model is: The chip U1 of MAX9263 is converted into serial LVDS differential signal RGB565 signal and is passed by 40,41 two pins of IC chip U1 Being passed to the 8 of relay K 1,9 foot switch terminal, second relies on LVDS switching and deserializer circuits 3 repeat circuit K1 to switch former car regards Frequently the video signal after signal and video decoding circuit 5 process DVR and shooting CVBS signaling interface 13, LVDS_SEL is as control Relay switch-over control signal, model in MCU control circuit 6 be: chip U7 pin 11 output of STM32F103C8T6 controls Signal.

For power-switching circuit 4, as shown in Figure 3；External 12V power supply, is powered by automobile ACC during normal work, exploitation External 12V voltage during debugging test, by two Zener diode D4, D7 burning voltage, F1, as electric fuse, prevents electric current mistake Greatly circuit module below is damaged, 9345 power management ICs, detect CAN and ACC signal, can play this utility model Realize powered down sleep to wake up up, to reduce power consumption purpose.Dc-dc MP2359, is converted into 5V VCC by 12V voltage Burning voltage, AM1117-3.3, AM1117-1.8, by 5V power supply, it is converted into 3.3V, 1.8V respectively, makes for other module With, all by 2,4 pin outputs.

Designing as shown in Figure 4 for video decoding circuit 5, YN0, YN1 input as TW8835, CVBS video signal Source, by inner decoding, is converted into RGB565 signal and exports LVDS conversion chip input port by 89～102 pins, 65 ~ 63 pins of TW8835 are MX25L6445 Flash interface, and to backing track, and radar track image data is read Take.

MCU control circuit 6 is designed as it is shown in figure 5, it is the core cell of utility model, control whole system fortune OK, using STM32F103C8T6 as microprocessor, it, by crystal oscillation clock circuit, reset circuit, forms minimum system.Wherein SW1-SW4 detects input pin as toggle switch, and LVDS_SEL switches pin, SDcard as display screen input video source CS, SPI1_MOSI, SPI1_SCK, SPI1_MISO, SDcard on passes through P2 terminal, is connected to SD card as MCU to SD card The pin of read-write operation.Wherein CAN_RX, CAN_TX CA as CAN transceiving data pin, IIC_SCL, IIC_SDA, as IIC module, communication clock and data transmission pin, AV1_PWRN-AV4_PWRN draws as the control of reserved connection 360 module Foot, CAM_PWRON controls pin as photographic head, and REVERSE_DET detects pin as astern signal, and IR_CTRL1 is Infrared receiver sensor pin, LED1, LED2 respectively drive red, green light emitting diode pin.

For toggle switch circuit design 7, as shown in Figure 6, SW-DIP-4 toggle switch, four input pins connect and draw Resistance, common end grounding, under dialling, some reforms into low level and is input to pipe corresponding for IC chip U7 in MCU control circuit 6 Foot is as detection input source.

For CAN transceiver circuit 9, as shown in Fig. 7；It is made up of TJA1041T chip and other peripheral components, will CAN protocol module CAN_TX within IC chip U7 in MCU control circuit 6, CAN_RX signal is changed, by CAN_L, CAN_H, exports and realizes communication in CAN.

For DVR and camera module, DVR forward sight drive recorder module interface, inputted by P13 interface, CAM_ RV, CAM_FV, be rearview camera respectively, forward sight camera video signal.

For SD card upgrade circuit module 8, as shown in Figure 8, upgrade as IC chip U7 mastery routine in MCU control circuit 6, And track, the interface that radar picture upgrading updates, 2 foot SDcar_CS are as chip selection signal, and 3 feet are as SOI_MISI Input signal, 5 feet as SPI_SCL clock, 6 feet as SOI_MISO output signal,

For JTAG debugging emulation circuit 11, as shown in Figure 9；P4 port 3.3V to be had supply voltage could normally work, Connecing J-Link debugger, this circuit works when software development debugging is downloaded.

For SPI-Flash circuit 10, as shown in Figure 10；MX25L644 is the memorizer of SPI-Flash, 64M capacity, 4 Individual IO connects IC chip U9 respective pins in video decoding circuit 5, and two of which IO connects IC chip in MCU control circuit 6 U7 respective pins carries out data storage.

For detection pilot wire circuit 12, as shown in figure 11, astern signal is detected by this circuit, simultaneously according to concrete Situation receives the selection video control signal of MCU control circuit 6 output, and 8050 audions amplify incoming level signal and drive rear class Circuit.

Claims (4)

1. reverse image accessory system, it includes former car screen (1), former car LVDS signal (2), LVDS switching and deserializer circuits (3), power-switching circuit (4), video decoding circuit (5), MCU control circuit (6), toggle switch circuit (7), SD card upgrade electricity Road (8), CAN transceiver circuit (9), SPI-Flash circuit (10), JTAG debugging emulation circuit (11), detects pilot wire circuit (12), DVR and shooting CVBS signaling interface (13), 360 modules preserved signal interface (14), it is characterized in that MCU control circuit (6) The dial-up state of detection toggle switch circuit (7), the LVDS switching signal outfan of MCU control circuit (6) and LVDS switching and The LVDS switching signal input of deserializer circuits (3) is connected and switches over control signal transmission；LVDS switching and deserializer Circuit (3) is converted into serial LVDS differential signal by IC chip U1 RGB565 signal and is connected to through circuit breaker K1 output Former car screen (1) video signal input terminal；In video decoding circuit (5), IC chip U9 is to DVR and shooting CVBS signaling interface (13) video signal carry out inner decoding be converted into RGB565 signal from output be connected to LVDS switching and deserializer circuits (3) respective input, arrives former car screen (1) video signal input terminal through LVDS switching and deserializer circuits (3) switching output.

Reverse image accessory system the most according to claim 1, is characterized in that the LVDS holding wire intercepted is input to LVDS Switching and deserializer circuits (3), in LVDS switching and deserializer circuits (3), model is: the chip U1 of MAX9263 is RGB565 Signal is converted into serial LVDS differential signal transmission to relay K 1 switch terminal, relay in LVDS switching and deserializer circuits (3) Device K1 switches former car video signal and processes the video letter after DVR and shooting CVBS signaling interface (13) with video decoding circuit (5) Number, LVDS_SEL end, as controlling the input of relay switch-over control signal, by model in MCU control circuit (6) is: Chip U7 pin 11 output of STM32F103C8T6 controls.

Reverse image accessory system the most according to claim 1, is characterized in that video decoding circuit (5), and YN0, YN1 end is made For the CVBS video signal input source of circuit, carry out inner decoding by the IC chip U9 that model is TW8825, be converted into RGB565 signal exports LVDS by 89～102 pins of IC chip U9 and switches and the input of deserializer circuits (3), It is i.e. 49～64 and 1, the 2 foot inputs of IC chip U1；In SPI-Flash circuit (10), IC chip U10 model is MX25L6445 5～7 feet receive 65～63 pins of IC chip U9 in video decoding circuit (5), to OSD, track picture is read out.

Reverse image accessory system the most according to claim 1, is characterized in that in MCU control circuit (6), IC chip U7 adopts With STM32F103C8T6 as microprocessor, it, by crystal oscillation clock circuit, reset circuit, forms minimum system；IC chip U7 12,13,25,26 feet detect input pin as toggle switch, 11 feet output LVDS_SEL switch display screen video signals, 15,16,17 feet of IC chip U7 are that SD card SPI communication interface is connected with in SD card upgrade circuit (8) the 5 of interface P2,7,3, 32,33 feet of IC chip U7 are as CAN data wire CAN_RX, CAN_TX, I2C_SCL, I2C_SDA, as IIC module pin, 41,21, the 28 of IC chip U7, i.e. AV1_PWRON～AV3_PWRON is the connection pin of reserved 360 module control interface (14), 19 feet of IC chip U7, i.e. CAM_PWRON is that photographic head controls pin, 22 feet of IC chip U7, i.e. REVERSE_DET is reversing Signal detection pin, the input of detection REVERSE_SIG, 27 feet of IC chip U7, i.e. IR_CTRL1 is infrared receiver sensing Device interface, and LED1, LED2 is red and green luminous diode interface.