CN2510352Y

CN2510352Y - Backing-car detecting and image-source automatic switching-over device

Info

Publication number: CN2510352Y
Application number: CN 01260324
Authority: CN
Inventors: 李万顶
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-14
Filing date: 2001-09-14
Publication date: 2002-09-11
Anticipated expiration: 2011-09-14

Abstract

The utility model relates to a back-draft detecting and image sources automatically switching device. The utility model transports the output signals of a back-draft radar unit and a back-draft image picking unit to an image synthesis unit, and the output signals are synthesized, also are connected to the display arranged on the vehicle through a forced switching circuit. In the normal state, the forced switching circuit is connected with another image signal source (such as the video disk player), and when the vehicle is in the back-draft state, the back-draft radar unit and the back-draft image picking unit begin to work, the forced switching circuit can switch forcedly and is connected with the image synthesis unit, the driver can conveniently see the image behind the vehicle and the distance detecting value from the display by switching the image source.

Description

Reversing detecting and image source automatic switching control equipment

Technical field

The utility model relates to a kind of reversing gear, refers to a kind of telltale image source in the automatic switchover car when entering reversing mode especially, and grasps the reversing detecting and the image source automatic switching control equipment of situation behind the car for steerman.

Background technology

Because the progress of science and technology, industrial community is continually developed new product and is assisted people to solve many difficult and complicated cases in life, and for example: Reverse Sensor sails out of in order to assist steerman parking or automatic stop parking lot.After so-called Reverse Sensor utilization emission ultrasonic chance obstacle turns back, calculate the distance between the tailstock and obstacle, the sound caution that utilizes different frequency is to assist steerman Control of Automobile advance and retreat.This kind Reverse Sensor has been the basic outfit of general caravan at present, and function is still constantly during upgrading, the alarm function that is provided in Reverse Sensor as present higher automobile has entered digitalisation, and adding imaging function, meaning is that steerman can absorb automobile rear image by photographic goods, and with the actual distance of concrete numeric display itself and obstacle, whereby, can make things convenient for the more definite grasp actual state of steerman, and the aforementioned final terminal that shows car rear image of relying is a small-sized Liquid Crystal Display (LCD) mostly, this Liquid Crystal Display (LCD) is not the demonstration that is exclusively used in reverse image and distance values, it is the part of audio-visual devices in the car mostly, meaning is that it also is used to play telecast or cooperates video compact disk player to play the laser disc film, and hence one can see that, and this Liquid Crystal Display (LCD) possesses two kinds of Presentation Functions at least: one is image behind the demonstration car; Another is then for playing telecast or film.Because these two kinds of functions are respectively from different signal sources, therefore, when steerman changes to some extent to the functional requirement of telltale, promptly must be switched by the manual switching mode, telltale such as formerly be used for playing film for example is when driving that human desires is stopped and must use Reverse Sensor the time, promptly must be with the signal source of manual mode switching display, obviously inconvenience to some extent in operation, thus remain further to be improved, and seek feasible solution.

Summary of the invention

The inventor designs the technical solution of the utility model at the disadvantages of above-mentioned prior art.

The utility model main purpose promptly provide a kind of can be when entering reversing mode telltale image source in the automatic switchover car, grasp the detecting control shifter of situation behind the car for steerman.

For reaching the major technique means that aforementioned purpose is taked, aforementioned means includes:

One Reverse Sensor unit, in order to the detecting tailstock and obstacle distance, and conversion produces actual distance numerical value;

One reverse image acquisition unit is in order to image behind the picked-up car;

One video compositing unit is connected with reverse image acquisition unit mouth with aforementioned Reverse Sensor unit, so that the relative obstacle distance numerical value of the tailstock is synthesized on image behind the car;

One forces commutation circuit, started by reverse Control work power supply, it possesses two signal of video signal input ends at least, and wherein an input end connects the video compositing unit, another input end is for connecting general audio-visual devices, and its mouth then is connected to set telltale in the car;

With aforementioned circuit layout under normal conditions, this forces commutation circuit and audio-visual devices to link to play the film program, when automobile enters the reversing state, and Reverse Sensor unit and reverse image acquisition unit are when starting working, force commutation circuit promptly to force to switch its signal source input end and the binding of video compositing unit, detect numerical value by image after watching car on the telltale with distance for steerman by means of the switching image source, to assist it to finish parking or to sail out of action.

Aforesaid Reverse Sensor unit is made up of two detecting backing distance device, a shaping amplification circuit, a treater and alarming devices that are mounted on tailstock place; Wherein treater is converted to actual distance values with the signal of detecting backing distance device reception.

Aforesaid reverse image acquisition unit is made of an image capturing treater.

Aforesaid pressure commutation circuit connects reverse image source and general image source respectively with one group of electromagnetic switch, and makes electromagnetic switch normally closed in general image source, when treating that energising is switched, promptly cuts to the reverse image source.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is a detailed circuit diagram of the present utility model (Reverse Sensor unit, a video compositing cell mesh);

Fig. 3 is the another detailed circuit diagram of the utility model (a reverse image acquisition unit part);

Fig. 4 is the utility model detailed circuit diagram (forcing the commutation circuit part) again.The figure number explanation:

10 Reverse Sensor unit, 13 shaping amplification circuits

1112 detecting backing distance devices

14 treaters, 15 alarming devices

20 reverse image acquisition units, 30 video compositing unit

40 force commutation circuit 41 electromagnetic switchs

42 image-processing circuits, 43 power circuits

50 telltales

The specific embodiment

Relevant structure division of the present utility model sees also shown in Figure 1ly, and it includes:

One Reverse Sensor unit 10 is made up of two detecting

backing distance device

11,12, a shaping amplification circuit 13, a treater 14 and alarming devices 15 that are mounted on tailstock place; Wherein: this detecting

backing distance device

11,12 is in order to the emission ultrasonic and receive the ultrasonic signal that the chance obstacle turns back; Shaping amplification circuit 13 is in order to carry out the shaping processing and amplifying to aforementioned ultrasonic signal again; This treater 14 will be converted to actual distance values through the shaping amplifying signal, and drive alarming device 15 to organize output signal separately, inform steerman with the sound of different frequency;

One reverse image acquisition unit 20, in order to image behind the picked-up car, and in reversing the time continue to send take the photograph signal of video signal;

One video compositing unit 30 has two input ends, is connected with the mouth of reverse image acquisition unit 20 with aforementioned Reverse Sensor unit 10 respectively; So that video compositing shows behind obstacle distance numerical value that Reverse Sensor unit 10 is sent and the car;

One forces commutation circuit 40, possesses at least two group image signal input parts, and wherein an input end connects video compositing unit 30, and another input end is for connecting general audio-visual devices, and its mouth is connected with a telltale 50; Whether whether its working power supply enter reverse by automobile and controlled again.

Can find out basiccircuit framework of the present utility model by above-mentioned explanation, under this framework, this pressure commutation circuit 40 links to play general film program with audio-visual devices, treat that automobile enters the reversing state, and Reverse Sensor unit 10 is when starting working with reverse image acquisition unit 20, promptly import power supply and force commutation circuit 40 to start, making its signal source input end force to switch with video compositing unit 30 links, borrow switching image source makes the steerman need not manual switchover, the image source that is about to play on the telltale 50 is converted to image behind the car, this moment on telltale 50 after showing car the image, and show the detecting numerical value of the tailstock simultaneously at a distance of obstacle, to assist it to finish parking smoothly or to sail out of action.During reversing automobile, do not open yet again, then open synchronously when forcing commutation circuit 40 energisings as telltale 50.

The further detailed construction of relevant aforementioned circuit, know clearly as described below:

At first, see also shown in Figure 2ly, its announcement has the circuit part of aforementioned Reverse Sensor unit 10, and figure central authorities disclose its shaping amplification circuit 13, and its two input end connects one group of detecting backing distance device respectively by joint P2, P3, and this is not shown in the figures; Its mouth is connected to the treater 14 shown in the figure upper left corner again, and in present embodiment, this treater 14 is made of the single-chip IC of numbering 16C711.The one mouth is connected to the alarming device of mainly being made up of oscillating circuit shown in the figure lower left corner 15, and it is not shown in the figures to deliver to buzzer phone to produce various oscillator signal; Treater 14 is organized mouth separately and is connected to the video compositing unit 30 shown in the figure upper right corner again, this video compositing unit 30 mainly is made of the image processor of numbering 74781, one input end is connected detailed circuit such as Fig. 3 by joint P5 with the mouth of reverse image acquisition unit 20, in the present embodiment, this reverse image acquisition unit 20 is made of a cmos image capturing treater, and its mouth then is connected to the signal input part of video compositing unit 30 by another joint P6.

See also shown in Figure 4, the detailed circuit of aforementioned pressure commutation circuit 40, it includes an electromagnetic switch 41, an image-processing circuit 42 and a power circuit 43; Wherein: two groups of common joints of these electromagnetic switch 41 tools, it is connected with the signal of video signal input end of telltale 50 by a set of joints P4, P5 respectively; Electromagnetic switch had two groups of normally closed contacts and two groups of normal opened contacts in 41 minutes again, and wherein normally closed contact is connected with general signal of video signal source such as video compact disk player by joint P1, P2; Its normal opened contact connects the mouth of image-processing circuit 42 again.

This image-processing circuit 42 is made up of a signal amplifier IC2 and two groups of Transis Transistor Q1, Q2, wherein the input end of signal amplifier IC2 is connected to the mouth of video compositing unit 30 by joint P3, and two Transis Transistor Q1, Q2 then are connected to the normal opened contact of electromagnetic switch 41 respectively with the collection utmost point.

This power circuit 43 mainly is made of a voltage stabilizing IC, its input power supply and reversing mode interlock, and meaning is an automobile when draining into reverse, promptly sends into power supply simultaneously to power circuit 43, and the working power of supplying preceding channels by power circuit 43.Power circuit 43 is connected to the power input of telltale 50 through joint P6 with a power output end again, when automobile enters the reversing state, and telltale 50 is not when opening yet, promptly by forcing commutation circuit 40 output power supplies with enforced opening telltale 50, watches situation behind the car for steerman.

Again, force commutation circuit 40 after electromagnetic switch 41 is obtained working power, be that excitatory its common joint that makes is cut to normal opened contact by normally closed contact, this moment video compositing unit 30 receive the signal of Reverse Sensor unit 10 and reverse image acquisition unit 20 and give synthetic after, promptly deliver to telltale 50 via the normal opened contact of aforementioned image-processing circuit 42, electromagnetic switch 41, switch to image behind the car with being about to telltale 50 image sources, grasp situation behind the car really for steerman.

Reversing mode is promptly detected by the pressure commutation circuit and the image source of the telltale that automaticallyes switch is Reverse Sensor unit and the synthetic image of reverse image acquisition unit because aforementioned shifter is in entering, remove whereby and can make things convenient for steerman directly by situation behind the image grasp car, more because of its for automaticallying switch, need not be by the steerman manual switchover; When other enters reversing mode, do not open yet, also have the function of the start forced, need not manually start shooting by steerman, so have the practicality and the convenience of height in the use as telltale.

Claims

1. a reversing is detected and the image source automatic switching control equipment, and it includes:

One Reverse Sensor unit in order to the detecting tailstock and obstacle distance and conversion generation actual distance numerical value;

One reverse image acquisition unit in order to image behind the picked-up car;

One video compositing unit in order to the output signal of synthetic aforementioned Reverse Sensor unit and reverse image acquisition unit;

One forces commutation circuit, and with the reversing mode interlock of automobile, it possesses two signal of video signal input ends at least, and wherein an input end connects the video compositing unit, and another input end is for connecting general audio-visual devices, and its mouth then is connected to set telltale in the car.

2. reversing detecting as claimed in claim 1 and image source automatic switching control equipment is characterized in that: this Reverse Sensor unit is made up of a treater and an alarming device that two detecting backing distance device, a shaping amplification circuit, the signals with the reception of detecting backing distance device that are mounted on tailstock place are converted to actual distance values; Wherein the mouth of treater is connected to the video compositing unit.

3. reversing detecting as claimed in claim 1 and image source automatic switching control equipment is characterized in that: this reverse image acquisition unit is caught image processor by one and is constituted.

4. reversing detecting as claimed in claim 1 and image source automatic switching control equipment, it is characterized in that: this pressure commutation circuit is made up of one group of electromagnetic switch, an image-processing circuit and a power circuit, the common joint of this electromagnetic switch, normally closed contact are connected to telltale and general image source respectively, its normal opened contact is connected to the mouth of image-processing circuit, and the input end of image-processing circuit is connected to the mouth of video compositing unit; The input power supply of this power circuit and reversing mode interlock.

5. reversing detecting as claimed in claim 4 and image source automatic switching control equipment is characterized in that: a mouth of this power circuit is connected to telltale, so that under the reversing state and telltale when not starting shooting, and this telltale of enforced opening.