CN201805509U

CN201805509U - Intelligent track reversing assist system

Info

Publication number: CN201805509U
Application number: CN201020512372XU
Authority: CN
Inventors: 郭华; 吴泽民
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2011-04-20
Anticipated expiration: 2020-08-31

Abstract

The utility model relates to an intelligent track reversing assist system, comprising a display, a connector and a main machine which are connected in sequence, wherein the main machine circuit comprises a CAN module, a singlechip control chip, a video signal clamping and amplifying circuit, a video signal synchronizing separator circuit, a character superposing chip, a reversing signal detection circuit, a memory chip and a power supply module; the power supply module is connected with the reversing signal detection circuit; the singlechip control chip is connected with the CAN module; and the character superposing chip is externally connected with the memory chip. According to the predicted reversing track, the system assists the driver to reverse and park the car or turn around, thus elevating the safety and practical benefit of the car and being more practicable. Besides, the system is convenient to install, is free of line cutting, does not damage the original line, ensures all the wires to be installed by the special connector compatible with the original car and thoroughly solves the problem of poor contact of the line during installation.

Description

Intelligence track reversing aid system

Technical field

The utility model relates to a kind of reverse aid, especially a kind of intelligent track reversing aid system.

Background technology

In society now, the ratio of this colony of driving family in society is increasing, and automobile has become the indispensable vehicles of people, and reversing is relatively thing, the especially new hand of headache for driving family.No matter be that reversing moves storehouse or curb parking, all need the driver to have certain technology.A lot of drivers are owing to be unfamiliar with road conditions; especially for driving new hand; enter into narrow and small alleyway and can't get out through regular meeting; or when weather more abominable; move backward under the situation that environment relatively crowds again; tend to make the driver can't grasp the truth at rear, contingencies such as side swipe can take place usually.For driver assistance person's reversing and parking, though existing vehicle backing radar generally cooperate be provided with buzzer remind the driver and arround the personage note, bump against article or the personnel that are positioned at the automobile rear when avoiding moveing backward accidentally, but still need by rearview mirror and in conjunction with experience, can be with vehicle parking to the desired position, therefore quite inconvenience for new hand.

The reversing of in the market track is divided into reversing of traditional mechanical approach sensor track and the reversing of bus mode track, has following shortcoming: the reversing of traditional mechanical approach sensor track, installation process is complexity too, also will connect former fare road being cut off refuting.The reversing of bus mode track, after system's confusion, the correcting mode complexity, the speed that picture upgrades is slow, and track shows and actual body movement route is not inconsistent.

In the existing track reverse aid; the part main frame lacks overload protection, short-circuit protection and no-load protection function, and the main frame standby current is big, and the voltage lasting accuracy is lower; antijamming capability and anti-electromagnetic capability extremely a little less than, work in do not carry out synchronous prompt facility.Also have the following disadvantages simultaneously: when use installing wiring consuming time too much, generally reequiping a chassis needs time spent 2-3 hour; Retrofit process is quite complicated, just can reequip on the basis that former fare road quite is familiar with; Former car internal wiring is destroyed serious, need cut off to refute again to former car and connect; Therefore the quality of product and stability can't be protected.Owing to there is the too much problem of wiring, the loosening or loose contact in the position that very easily causes plugging into causes former fare road to lose due protection.

The utility model content

At the weak point that exists in the above-mentioned technology, the utility model provides the extremely strong according to the reversing of backing track path and antijamming capability and anti-electromagnetic capability of a kind of high intelligence, uses intelligent very easily track reversing aid system is installed.

For achieving the above object, the utility model provides a kind of intelligent track reversing aid system, constitute by the display, connector and the main frame that connect successively, described host circuit comprises CAN module, singlechip control chip, video signal clamp and amplifying circuit, vision signal synchronizing separator circuit, character overlap chip, astern signal testing circuit, memory chip and power module, described power module is connected with described astern signal testing circuit, described singlechip control chip is connected with described CAN module, the external described memory chip of described character overlap chip.

Described CAN module is made of CAN controller and high-speed CAN transceiver controller, can read the data of wheel angle sensors, have on-site data gathering, control and CAN bus communication function, it can pass through the CAN bus communication, transmits various parameters such as vehicle-state.

Described power module is made of the power module of CAN module and the power module of video module.

The OSD able to programme large scale integrated circuit of described character overlap chip for making with CMOS technology, has flying-spot video generator, display-memory (VRAM) and font memory interface, only need the small number of external element just can possess character and graphical display function, this circuit has vision signal I/O function, as a kind of general OSD, the stack of finishing vision signal and character shows that display position control can be provided with the original position of horizontal direction, sets line-spacing simultaneously.

Described power module supply power voltage is 5V, D7 is used to limit current direction in the power module of described CAN module, C1, C7 are used for filtering, L2 is used to limit transient current, C8 is used to improve the stability of input voltage, U10 is used for+12V voltage step-down is+5V that C9, C13 are used for filtering and improve the stability of output voltage.The power module supply power voltage of described video module is 5V, power by the reversing automobile line, when reversing automobile, the reversing line can provide 12V voltage, because the power module institute consumed current of video module is bigger, ripple and stability requirement to power supply are higher, so by the two-stage step-down, D2, D3 are the restriction current direction, prevent power supply and put upside down misconnection and surge etc., E4 is used for filtering, and C25, E8 are used for the stability that filtering improves output voltage.

Described video signal clamp and amplifying circuit are the video input signals pretreatment module, amplifying circuit adopts triode Q1, select the identical diode D1 of conduction voltage drop, making the clamping voltage of D1 emitter by adjusting resistance R 2 is 1V, and the vision signal (Vout) of output goes up the direct current biasing of stack 1V simultaneously.

Described vision signal synchronizing separator circuit is a row separator, isolates signals such as composite sync, mixed blanking from vision signal, and makes these signals energy synchronous coordination work.The integrated level height of this circuit, only a small amount of peripheral circuit of need just can extract the synchronizing signal in the vision signal effectively.

Described astern signal testing circuit, when reversing automobile, the power module of video module can provide 5V voltage, and D1 is a voltage-stabiliser tube, circuit turn-on when voltage surpasses 3.6V, conduction voltage drop is 3.6V, R37, R38 current limliting.

Compared with prior art, the utlity model has following advantage:

The intelligent track reversing aid system that the utility model provides can be assisted the driver to move backward and park or turn round according to the vehicle backing track path of being predicted, promotes the fail safe and the Practical Benefit of vehicle, makes it be suitable for practicality more.

After system's confusion, proofread and correct simple, need not split out main frame, only with continuous three place's reverse gears, the mode that track shows is not used the synthetic picture of chip, and adopt the movement locus of taking from actual tailstock trunk that is stored in the plug-in memory, so the speed that picture upgrades is fast, track shows the most approaching actual body movement route.At the wheelbase of the wheel of different cars system, the difference of spacing, and the difference of camera installation site, provide track to adjust mode respectively.

High-precision circuit carries out effective filtering to the interference of automobile engine, possesses the short circuit defencive function, and antijamming capability and anti-electromagnetic capability are extremely strong.The utility model set-up time is extremely short, and with minute calculating, on average each car set-up time is 15 minutes; Installation process is simple, convenient, exempts from trimming, need not destroy former fare road, and all wiring are all installed with the mode of the special connector of former car compatibility with employing, does not need trimming or repacking vehicle line, has thoroughly solved the problem of circuit loose contact when installing.

Description of drawings

Fig. 1 is the utility model system connection layout;

Fig. 2 is the utility model host structure chart;

Fig. 3 is vision signal synchronizing separator circuit figure in the utility model;

Fig. 4 is a vision signal amplification circuit diagram in the utility model;

Fig. 5 is a video signal clamp circuit diagram in the utility model;

Fig. 6 is the power module circuitry figure of video module in the utility model;

Fig. 7 is the power module circuitry figure of CAN module in the utility model;

Fig. 8 is astern signal testing circuit figure in the utility model.

The main element symbol description is as follows:

5000, memory chip 5001, character overlap chip

5002, vision signal synchronizing separator circuit 5003, video signal clamp and amplifying circuit

5004, singlechip control chip 5005, power module

5006, astern signal testing circuit 5008, CAN controller

5009, high-speed CAN transceiver controller

Embodiment

In order more clearly to explain the utility model, the utility model will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model provides a kind of intelligent track reversing aid system, earlier the reversing video input signals is carried out clamp and amplification by video signal clamp and amplifying circuit 5003, from the signal after clamp and the processing and amplifying, 5002 isolate signals such as composite sync, mixed blanking, and make these signals energy synchronous coordination work.Singlechip control chip 5004 reads the data of wheel angle sensors from CAN module 5008, and by control 5001, be mapped among 5001 the VRAM being stored in the plug-in memory corresponding track lines, and finish in field synchronization interim of vision signal and to refresh, on automobile DVD screen, show at last.

A kind of intelligent track reversing aid system, constitute by the display, connector and the main frame that connect successively, described host circuit comprises CAN module, singlechip control chip, video signal clamp and amplifying circuit, vision signal synchronizing separator circuit, character overlap chip, astern signal testing circuit, memory chip and power module, power module is connected with the astern signal testing circuit, singlechip control chip is connected with the CAN module, character overlap chip external memorizer chip.

The CAN module is made of CAN controller and high-speed CAN transceiver controller, can read the data of wheel angle sensors, has on-site data gathering, control and CAN bus communication function, and it can pass through the CAN bus communication, transmits various parameters such as vehicle-state.

Power module is made of the power module of CAN module and the power module of video module.

The OSD able to programme large scale integrated circuit of character overlap chip for making with CMOS technology, has flying-spot video generator, display-memory (VRAM) and font memory interface, only need the small number of external element just can possess character and graphical display function, this circuit has vision signal I/O function, as a kind of general OSD, the stack of finishing vision signal and character shows that display position control can be provided with the original position of horizontal direction, sets line-spacing simultaneously.

The power module supply power voltage is 5V, D7 is used to limit current direction in the power module of described CAN module, C1, C7 are used for filtering, L2 is used to limit transient current, C8 is used to improve the stability of input voltage, U10 is used for+12V voltage step-down is+5V that C9, C13 are used for filtering and improve the stability of output voltage.The power module supply power voltage of video module is 5V, power by the reversing automobile line, when reversing automobile, the reversing line can provide 12V voltage, because the power module institute consumed current of video module is bigger, ripple and stability requirement to power supply are higher, so by the two-stage step-down, D2, D3 are the restriction current direction, prevent power supply and put upside down misconnection and surge etc., E4 is used for filtering, and C25, E8 are used for the stability that filtering improves output voltage.

Video signal clamp and amplifying circuit are the video input signals pretreatment module, amplifying circuit adopts triode Q1, select the identical diode D1 of conduction voltage drop, making the clamping voltage of D1 emitter by adjusting resistance R 2 is 1V, and the vision signal (Vout) of output goes up the direct current biasing of stack 1V simultaneously.

The vision signal synchronizing separator circuit is a row separator, isolates signals such as composite sync, mixed blanking from vision signal, and makes these signals energy synchronous coordination work.The integrated level height of this circuit, only a small amount of peripheral circuit of need just can effectively extract the synchronizing signal in the vision signal.

The astern signal testing circuit is when reversing automobile, and the power module of video module can provide 5V voltage, and D1 is a voltage-stabiliser tube, circuit turn-on when voltage surpasses 3.6V, and conduction voltage drop is 3.6V, R37, R38 current limliting.

More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.

Claims

1. intelligent track reversing aid system, constitute by the display, connector and the main frame that connect successively, it is characterized in that, described host circuit comprises CAN module, singlechip control chip, video signal clamp and amplifying circuit, vision signal synchronizing separator circuit, character overlap chip, astern signal testing circuit, memory chip and power module, described power module is connected with described astern signal testing circuit, described singlechip control chip is connected with described CAN module, the external described memory chip of described character overlap chip.

2. intelligent track reversing aid system according to claim 1 is characterized in that described CAN module is made of CAN controller and high-speed CAN transceiver controller.

3. intelligent track reversing aid system according to claim 1 is characterized in that described power module is made of the power module of CAN module and the power module of video module.

4. intelligent track reversing aid system according to claim 1 is characterized in that, the OSD able to programme large scale integrated circuit of described character overlap chip for making with CMOS technology.

5. intelligent track reversing aid system according to claim 1 is characterized in that described power module supply power voltage is 5V.