CN2751362Y

CN2751362Y - Visible black box

Info

Publication number: CN2751362Y
Application number: CN 200420115414
Authority: CN
Inventors: 王刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-23
Filing date: 2004-11-23
Publication date: 2006-01-11
Anticipated expiration: 2014-11-23

Abstract

The utility model relates to a visible black box which is a video image recording device with the combination of black box technology and digital camera technology. The utility model comprises basic parts of a digital camera, which are a lens, an imaging sensor, an image preprocessing circuit, a digital camera chip, a memory card, a display, a braking sensor, a control CPU, a clock, an icon generator and an automobile interface circuit, wherein the icon generator can generate both icons respectively for automobile speed, automobile braking and trodden brake pedals and time characters containing year, month, day, hour, minute and second, and the braking sensor for the judgement of an emergency can be a photoelectric type braking sensor or is composed of a piezoresistive acceleration sensor and an amplifying comparison circuit. The visible black box can work under the condition of no connection with automobile circuits, automatically record single images in a timed manner, and record continuous images in a mandatory manner. The image materials of ahead highway conditions and emergency disposition conditions and the driving conditions of an automobile can be recorded before an automobile accident in a faithful and objective manner, which offers records that are sufficient for being used as the most powerful evidence.

Description

Visual black box

Technical field

The utility model relates to a kind of automobile electronics, is specifically related to a kind of automobile-used visual black box.

Background technology

Black box originally is a kind of equipment of aircraft, is used for writing down dialogue between the pilot etc. in flight parameter in the aircraft flight and ground control personnel and pilot's dialogue and the cabin, searches the important evidence of failure cause when accident occurring as aircraft.

Eighties of last century eighties, the black box technology is transplanted on the automobile, developed automobile-used black box, can write down some data in the running car and driver's certain operations action, such as speed per hour, brake, light state and steering indicating light state or the like, its initial purpose also is to want to occur as automobile the foundation of traffic police's processing accident after the accident.

But because automobile is when ground run, situation on every side is very complicated, the situation around existing automobile black box can't write down before the car at all, and the data that is write down is nowhere near, and just is difficult to the foundation as the processing accident; The special equipment of automobile black box needs goes to read data wherein simultaneously, and it is very inconvenient to use, and front-end investment is very big, fails all the time formally to come into operation so more than two decades appears in automobile black box.

New traffic method is put to the proof accident and is had higher requirement, and is exactly the obligation that the driver has proof.This is a very thing of headache, and a traffic accident accident is enumerated strong evidence not a duck soup, especially in epoch of current this human feelings desalination.

So one piece of report is arranged, and a female driver has an accident, and has taken on-the-spot situation with the digital camera of carrying in time, has successfully done strong proof for oneself.

Digital camera has been proven technique now, and various digital cameras flood market, from mega pixel to ten million pixel, obtain several ten thousand yuan from hundreds of unit, complete.The characteristics of digital camera are can promptly clap promptly to see, are can't be better as the on-the-spot instrument of putting to the proof of a kind of motor-vehicle accident.

Yet the aim that common digital camera designed originally is not to be this purpose, have only when the driver with and can work when remembering taking pictures in the scene.

The utility model content

The utility model gathers black box and digital camera technology exactly, proposes a kind of automobile-used visual black box.

The automobile-used visual black box of the utility model, comprise camera lens, imaging sensor, the digital camera chip, storage card, display and USB interface, it is characterized in that being provided with braking sensor, control CPU and timer, wherein braking sensor is connected to the input port of control CPU, the output port of control CPU is taken control interface by the single width that timer connects digital camera chip, another interface connects the continuous shooting control interface of digital camera chip, control CPU exports regularly single width shooting signal respectively according to the signal of braking sensor and takes the continuous shooting control interface of signal to digital camera continuously to the single width shooting control interface or the output of digital camera, controls the basic operation of visual black box.

The visual black box of the utility model, described braking sensor be one by shell, be set in PCB version in the shell, the shell with spring-supported weight sheet and the light emission that is welded on the PCB and receive the photo-electric inertial sensor that pipe is constituted.

The visual black box of the utility model, described braking sensor can also add amplification comparator circuit composition braking sensor with piezoresistance type acceleration sensor and substitute.

The visual black box of the utility model, also be provided with an icon generator and image pre-process circuit, the icon generator can produce that the speed of a motor vehicle, car brakeing, brake pedal are stepped on, turned to, several icons of headlight and comprise in the time character of the date Hour Minute Second speed of a motor vehicle some kinds, the input of icon generator connects control CPU, output is connected with the digital camera chip by the image pre-process circuit, and the icon of icon generator and the picture signal of CMOS are sent into the digital camera chip after superposeing in the image pre-process circuit.

The visual black box of the utility model, also be provided with an automobile interface circuit, this automobile interface circuit can comprise signal circuits such as vehicle speed signal, brake signal, turn signal, the brake of car light signal and pedal signal, and its output is connected with some input ports of control CPU.

This visual black box can the BR vehicle front road conditions; The use of braking sensor, visual black box can be taken the state that videotapes that be transformed into the emergency circumstance from ordinary times timing single width, and the condition of road surface of car the place ahead a period of time when taking accident down send simultaneously and deposits automobile and control some parameters; These image recordings are true and objective, are enough to as the strongest proof of scene of an automobile accident; Another big characteristics of this visual black box are exactly to save complicated electrical connecting wires working under almost without any situation about being connected with automobile circuit.

Description of drawings

Fig. 1 is the circuit block diagram of the visual black box of the utility model;

Fig. 2 is the demonstration icon synoptic diagram of the visual black box of the utility model;

Fig. 3 is the synoptic diagram of a kind of photo-electric braking sensor of the visual black box of the utility model;

Fig. 4 be the visual black box of the utility model the photo-electric braking sensor side view;

Fig. 5 is the wiring diagram of the electronic type braking sensor of the visual black box of the utility model.

Embodiment

In order further to illustrate the visual black box of the utility model, do more detailed narration below in conjunction with embodiment.

A visual black box can be to realize that with the digital camera chip of simple cheap this is embodiment one, visible Fig. 1.

In visual black box shown in Figure 1, digital camera chip and the same same image-position sensor, storage card, display and the USB interface of connecting in digital camera, different is, single width is taken control and is taken two controls of control continuously and is connected on the control CPU in the operating key interface of digital camera chip, and the input end of control CPU has connected a braking sensor.

General computer picture, when its pixel was 640 * 480, picture was enough clear, and therefore, the camera pixel of visual black box selects 1,300,000-2,100,000 usually for use; Imaging sensor wherein can have two kinds of CMOS and CCD, considers that the CCD price is higher, selects for use CMOS better; For the needs of on-the-spot evidence, visual black box wishes to photograph the big as far as possible scene of vehicle front, and cam lens can be selected the 35mm tight shot that is equivalent to the 35mm camera for use.

This braking sensor can be a kind of photo-electric braking sensor, sees Fig. 3 and 4, is made up of weight sheet 5, photoelectric tube 4, spring 7, pcb board 9 and the metal shell 8 of band stop part 6.Photoelectric tube 4 is welded on the pcb board 9, two springs 7 of weight sheet 5 usefulness are supported in the shell, and a teat should be arranged on the pcb board 9, and the groove of a correspondence is arranged on the shell 8, the groove of photoelectric tube is aimed at the stop part 6 on the weight sheet 5 during with the assurance pressing, and leaves abundant activity space.The distance of pcb board and shell upper is greater than the thickness of weight sheet 5.The electrical connecting wires of braking sensor is directly drawn from pcb board.This sensor must guarantee 2 points when mounted, the one, keep flat, and the 2nd, guarantee photoelectric tube installation direction the preceding.

This braking sensor has two positions, and when vehicle did not have brake hard, weight sheet 5 was pressed by spring 7, can not move forward, and light path is logical between the photoelectric tube, output low level; In case brake hard occurs, because action of inertia, weight sheet 5 has overcome the elastic force of spring 7, travels forward, and stop part 6 blocks light path on the weight sheet 5, and the output of photoelectric tube becomes high level.

After the start, the timing single width control of control CPU is output as permission, takes to be controlled to be continuously and forbids, visual black box is in regularly single width shooting state, and the single image of shooting is recorded in the storage card one by one.

The level of braking sensor changes delivers to control CPU, and the two-way of control CPU is exported separately and changed, and regularly single width is taken signal by allowing change to forbid, takes signal continuously and allows by forbidding becoming, and the digital camera chip enters continuous shooting state.

Other control interfaces of digital camera all are connected on a suitable fixed position and get final product, and need not the adjustment state exactly.

Visual black box also is provided with icon generator, image pre-process circuit and auto electric interface circuit.The image pre-process circuit is connected between cmos sensor and the digital camera chip, and the icon generator is connected between control CPU and the image pre-process circuit, and electric interfaces connects some input ports of control CPU on the car.

Be preset with following icon in the icon generator and see Fig. 2: brake hard icon 21, speed of a motor vehicle character 22, brake pedal icon and comprise time character of date Hour Minute Second etc.These icons are selected respectively according to the difference of control CPU input signal, enter the digital camera chip after delivering to the image lover stack that image pre-process circuit and CMOS come.In other words, when taking, place on record during the information of same of these reflection vehicle ' situations.

On the car interface circuit be exactly for introduce the speed of a motor vehicle, brake pedal, about turn to, status signal such as headlight, be connected on the input port of control CPU.

Owing to be provided with braking sensor in the visual black box, take continuously and only when brake hard, just carry out, so one section consecutive image is to have most to put to the proof the record that is worth, itself just comprises the information of braking; Add electric signal on getting on the bus draw rather difficult, so electrical interface circuits is the optional and nonessential circuit of the utility model on icon generator, image pre-process circuit and the car.If do not consider power supply, the visual black box of the utility model can be worked not having under any situation about being connected with automobile circuit.Certainly, electric interfaces can be noted how more intuitive information on employing icon generator and the car.

The braking sensor of visual black box might not only above-mentioned photo-electric braking sensor be a unique selection, can also select for use piezoresistance type acceleration sensor shown in Figure 5 to mix essential amplifying circuit LM324 and comparator circuit LM393 composition, wherein, R11 and R12 are that the thresholding of comparer is adjusted resistance, and the output terminal of LM393 is the output of braking sensor.This way is sensitiveer, and the thresholding of suitable adjustment comparer can obtain brake hard threshold threshold more accurately.But piezoresistance type acceleration sensor price comparison height can't become optimal selection at present, can consider after the price reduction in the future.

Display and USB output be connected and function and general digital camera identical, just unwanted the time with normal pass display for well, in order to avoid influence driver's driving.

Reading of image document can be observed by the display on the visual black box; Now the traffic police is typically equipped with notebook computer, mixes USB line or card reader, and the image document that just can call visual black box is watched and preserved; The driver also can replace storage card as the evidence long preservation.

Obviously, because the data in the visual black box has the multiple way that reads, and these ways all are general obtaining easily, so also having overcome traditional black box, the utility model need specialized equipment to read the critical defect of data, be easier to popularize, can progressively popularize by autonomous voluntary principle fully.

More than be an embodiment of the present utility model, most preferred embodiment surely belongs to the function of control CPU and is integrated in the digital camera chip.We know that the digital camera chip itself is exactly a dual-cpu structure, have an image DSP and a digital camera control cpu.And the control cpu function of visual black box can be integrated among the control CPU of digital camera chip fully.This is the way of saving most, can make the very cheap visual black box of price, even can be used as a kind of digital camera production with black box function.But can only to be specialized factory just can accomplish for this, is not repeated here.

In addition, the visual black box of the utility model can also and present existing reversing automobile system, automobile DVD technological incorporation, utilize their existing display system, derive from the product that makes new advances.

Except that above-mentioned, visual black box is not can only be as automobile-used, and other occasion also can find its purposes.

Claims

1, a kind of visual black box, comprise camera lens, imaging sensor, the digital camera chip, storage card, display and USB interface, it is characterized in that being provided with braking sensor, control CPU and timer, wherein braking sensor is connected to the input port of control CPU, the output port of control CPU is taken control interface by the single width that timer connects digital camera chip, another interface connects the continuous shooting control interface of digital camera chip, control CPU exports regularly single width shooting signal respectively according to the signal of braking sensor and takes the continuous shooting control interface of signal to digital camera continuously to the single width shooting control interface or the output of digital camera, controls the basic operation of visual black box.

2, according to the visual black box of claim 1, it is characterized in that described braking sensor be one by shell, be set in pcb board in the shell, the shell with spring-supported weight sheet and the light emission that is welded on the PCB and receive the photo-electric inertial sensor that pipe is constituted.

3,, it is characterized in that described braking sensor can also substitute than circuit composition braking sensor with piezoresistance type acceleration sensor and amplification ratio according to the visual black box of claim 1.

4, according to the visual black box of claim 2 or 3, it is characterized in that also being provided with an icon generator and image pre-process circuit, the icon generator can produce that car brakeing, the speed of a motor vehicle, brake pedal are stepped on, turned to, several icons of headlight and comprise in the time character of the date Hour Minute Second speed of a motor vehicle some kinds, the input of icon generator connects control CPU, output is connected with the digital camera chip by the image pre-process circuit, and the icon of icon generator and the picture signal of CMOS are sent into the digital camera chip after superposeing in the image pre-process circuit.

5, according to the visual black box of claim 4, it is characterized in that also being provided with an automobile interface circuit, this automobile interface circuit can comprise signal circuits such as vehicle speed signal, brake signal, turn signal, car light signal and pedal signal, and its output is connected with some input ports of control CPU.