CN2134662Y

CN2134662Y - Automotive rear vision blind area object detector

Info

Publication number: CN2134662Y
Application number: CN 92216694
Authority: CN
Inventors: 程国璋
Original assignee: COMMUNICATION CORP OF LIAOHE PETROLEUM PROSPECTION BUREAU
Current assignee: COMMUNICATION CORP OF LIAOHE PETROLEUM PROSPECTION BUREAU
Priority date: 1992-08-07
Filing date: 1992-08-07
Publication date: 1993-05-26
Anticipated expiration: 2002-08-07

Abstract

The utility model relates to an automotive rear vision blind area object detector, which is an electronic alarm and used for detecting objects behind the automobile. The utility model is composed of a detecting portion arranged on the rear of the automobile tail, a transmitting circuit, a receiving circuit, a time control circuit, an alarm in the inner of the automobile operator cabin and a sound and light alarm device. The transmitting circuit of the alarm is a circuit board which is formed by an ultrasonic transducing trigger equipment Y1 and an integrated circuit IC4. The receiving circuit is a circuit board which is formed by a Schmidt trigger IC2 and an ultrasonic transducer Y2. The time control circuit is a circuit board which is formed by an IC3, an IC5, an IC6 and an IC7. The detecting portion is connected with the sound and light alarm device by the conducting wire.

Description

Automotive rear vision blind area object detector

The utility model relates to a kind of alert device of electron plate with object detection behind the what automobile car.

At present, in the reversing automobile process, object for the automobile back is to watch from a height or a distance observation by vehicle backing rear-view mirror, try to forestall traffic accidents, but the sight line blind area behind car in the certain distance, in case have people and obstacle object driver be do not observe just be easy to occur accident, in order to prevent that a kind of " sound prompting device " take place once to occur on the market at no distant date this type of accident product warning pedestrian from leaving the blind area but does not fundamentally still eliminate driver's psychology on tenterhooks when moveing backward, still can there be the possibility of hitting thing, can provide the utensil that can detect barrier when moveing backward such as a kind of, not be reported so far.

The purpose of this utility model is an object detector behind a kind of car that designs in order to overcome above-mentioned deficiency, when reversing automobile, in the sight line blind area that side mirror does not observe, if people or other object are arranged, detector just can send the warning reminding driver to be noted, avoids taking place the reversing accident.

Implementation of the present utility model is:

Indoor in car steering by putting a sound, light warning device, letter ultrasonic listening part at automobile tail can be sent ultrasonic signal automatically, the ultrasonic signal that sends as the obstacle object is reflected through object, this reflection wave is by discriminating, processing, the generation alerting signal of probe portion circuit, this signal is transferred in the interior acoustic-optic alarm of pilothouse and goes, and causes that the driver notes thereby send alerting signal.The advantage of this device is: because the detector that has adopted integrated circuit to form makes this device have that volume is little, in light weight, cost is low, working stability, and the little anti-vibration of energy consumption, jamproof characteristics.This device is outstanding when being also advantageous in that reversing automobile, can detect vehicle backing rear-view mirror observed less than object can fundamentally overcome the reversing accident; This detector effective detection range is 6 meters, the needs in the time of can fully satisfying the vehicle backing observation.

The utility model is provided by following examples:

Below in conjunction with accompanying drawing the utility model is described further

Fig. 1 automobile car retracement line blind area object detector circuit block scheme

Fig. 2 automobile car retracement line blind area object detector circuit schematic diagram

Fig. 3 automobile car retracement line blind area object detector structural representation

This utility model is by the probe portion that is installed in tailstock rear portion: the warning part in radiating circuit and receiving circuit and time control circuit and the pilothouse: the wherein radiating circuit that sound, light warning device are formed is by a ultrasonic transducer Y ₁And integrated circuit (IC) ₄The circuit board that constitutes, receiving circuit is by a schmitt trigger IC ₂And ultrasonic transducer Y ₂, integrated circuit (IC) ₁The circuit board time control circuit that constitutes is by integrated circuit (IC) ₃, IC ₅, IC ₆, IC ₇The circuit board that constitutes; Probe portion by lead and light, acoustic alarm system connection simultaneously.

Principle of work of the present utility model is:

This electronic warning is formed (Fig. 1) its probe portion by probe portion 2 and warning part 1 and is comprised ultrasonic transmit circuit and ultrasound wave receiving circuit and time control circuit, and the part of reporting to the police is made up of sound, light, warning system.Ultrasonic transducer y in the ultrasonic transmit circuit ₁3 pin of one another termination of end ground connection IC4 (it is one 555 time-base integrated circuit)

The R end of IC4 and the IC7D output terminal in the time control circuit join.

The ultrasonic transducer y of ultrasound wave receiving circuit ₂One end ground connection, another termination integrated circuit.The IC1(7 pin), IC1 is a pre-amplification circuit with amplification demodulator function.1 pin of IC1 is an output terminal, and it passes through resistance R ₃Connect positive source (VDD), and connect the input end of IC2A through resistance R 4, IC2 is one and has the schmitt trigger that the gate input function comprises four separate units.

Time control circuit is by integrated circuit (IC) ₃, IC ₅, IC ₆, IC ₇Constitute.IC ₅, IC ₆Be 14=system counter/frequency divider, IC ₃For comprising the monostalbe trigger of two separate units, IC ₇For comprising the NAND gate circuit of four separate units.

Sound light alarming circuit is by luminous=utmost point pipe D, resistance R ₇, capacitor C ₉, piezoelectric ceramic piece y ₃Constitute.

The course of work of the present utility model is:

Integrated circuit (IC) in hyperacoustic probe portion ₅Square-wave signal that frequency is 5HZ of Q14 end output, through Sheffer stroke gate IC ₇The D paraphase, control integrated circuit IC ₄Export a frequency and be 40KHZ, 0.2 second discontinuous signal, this signal is added to ultrasonic transducer y ₁On launch, simultaneously, integrated circuit (IC) ₅Q14 end output signal also as monostable trigger IC ₃Trigger pip, make IC ₃B exports the pulse signal that pulse width is 1.48ms, and it is as IC ₃A trigger pip, IC ₃The output signal of A is used to extract the ultrasound wave sample value that is reflected by object, and ultrasonic transducer y2 changes into electric signal, again through IC after receiving the object reflection wave that is sent by y1 ₁Frequency-selecting is amplified, export after the detection, be added on the schmitt trigger IC2A through resistance R 4 and resistance R 8, under the effect of IC3A output signal, when the object reflection wave exists, the IC2B output low level, thereby make the R-S trigger counter-rotating that constitutes by IC2D and IC2E, so light emitting diode D sends light and reports to the police, meanwhile, IC6 begins the frequency division numeration, and the Q9 end is with 0.4 second cycle output square-wave signal, send 0.4 second interrupted tick alarm sound through Sheffer stroke gate IC7B by capacitor C 9 promotion piezoelectric ceramic pieces with 1250 hertz of sound signals that the Q6 end of IC5 is exported.After the object behind the car left, the IC7A output low level made the upset of R-S trigger, and warning stops.

All manufacturing with printed circuit board (PCB) of detection circuit of the present utility model and warning system forms, and is placed in the shell of full casting, and the ultrasonic receiving device in the described probe portion respectively has a ultrasonic transmission/reception window.

Claims

1, a kind of electronic alarm with object detection behind the what automobile car is by the probe portion that is installed in tailstock rear portion: comprise radiating circuit, and the warning part in the receiving circuit, time control circuit and pilothouse, acoustooptic alarm system is formed; Its feature is by a ultrasonic transducer Y at the described radiating circuit of what ₁And integrated circuit (IC) ₄The circuit board that constitutes, receiving circuit is by a schmitt trigger IC ₂And ultrasonic transducer Y ₂, integrated circuit (IC) ₁The circuit board that constitutes; Time control circuit is by integrated circuit (IC) ₃IC ₅, IC ₆, IC ₇The circuit board that constitutes; Control section by the light in lead and the part of reporting to the police, acoustic alarm system connection simultaneously.

2, electronic alarm according to claim 1, its feature be at the what probe portion, and the circuit of the part of reporting to the police is all manufactured with printed circuit board (PCB) and formed, and by device in the shell of full casting.

3, device according to claim 1, its feature ultrasound wave sending and receiving, the device in probe portion respectively has sending and receiving, window.