CN2192916Y - Reflecting infrared safety belt prompter - Google Patents

Abstract

The utility model designs a prompting device for prompting drivers and passengers of a motor vehicle to wear safety belts, which is composed of an infrared transmitter, an infrared receiver, an amplifier, a detector and a buzzer. The utility model can have a buzzing prompt for the drivers and passengers who are not used to or ignore wearing the safety belts in time, and the purpose of safety driving by wearing the safety belts can be ensured. The utility model has the advantages of compact and skillful structure, convenient installation and low cost. The utility model can be fast matched with any type of the safety belt of the motor vehicle.

Description

Reflecting infrared safety belt prompter

The utility model relates to a kind of prompting device device that is applicable to various motor vehicle system of disposition securing band, and being specially adapted to that motor vehicle is not done any change just can matching used seat belt apparatus.

As everyone knows, it is for preventing or reduce important measures of traffic safety accident that securing band is worn in driving, and China wears the traffic law of securing band when also coming into effect driving.

But, owing to customary reason, or driving people's inadvertent, the situation that the driver and conductor does not wear securing band during driving happens occasionally, thereby causes contingent traffic hazard.

The purpose of this utility model is to overcome the above-mentioned problem that may occur to provide a kind of preceding suggestion device that must wear securing band of driving a vehicle for the driver and conductor, avoids the traffic hazard that is occurred owing to not wearing securing band.

The purpose of this utility model is achieved in that the utility model is made up of infrared transmitter, infrared receiver, amplifier, wave detector and hummer.After the infrared pulse light beam of the generation of the radiating circuit in the infrared ray transmitter is received by infrared receiver, whether amplifier provides output signal to the wave detector of next stage according to the decision of the potential change of input end, and whether the hummer that links to each other with wave detector sends the sound depends on then whether the wave detector output terminal is low level.Thereby realize the purpose that sound prompting driver and conductor fastens seat belts.

Accompanying drawing has provided embodiment of the present utility model.

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

Fig. 2 is an electrical schematic diagram of the present utility model;

Fig. 3 is the position view of infrared transmitter and infrared receiver.

With reference to Fig. 1, the utility model is made up of infrared transmitter, infrared receiver, amplifier, wave detector and hummer.

With reference to Fig. 2, infrared transmitter is formed by pulse producer that IC1, D1, D2, R1, R2, C1, C2 constituted with by the radiating circuit that R3, D3 constitute.After the circuit energized, IC1 2 pin current potentials are zero, IC1 3 pin are high level, along with the time lengthening power supply charges to C1 by R1, D2, when the C1 both end voltage rose to 2/3 supply voltage, IC1 6 pin current potentials began to change until making IC1 3 pin become low level again.The voltage at C1 two ends is charged to the width that the used time of 2/3 supply voltage has determined IC1 3 pin output impulse level by zero.When IC1 6 pin level during more than or equal to 2/3 supply voltage C1 pass through D1, R2 and the discharge of IC1 7 pin, descend gradually along with prolonging the C1 both end voltage discharge time, IC1 2 pin current potentials become low level when being less than or equal to 1/3 supply voltage when dropping to, and IC1 3 pin are then exported high level.C1 has determined the recurrent interval of pulse producer discharge time, as long as said process repeats, at IC1 3 pin pulse train output is just arranged.The oscillation frequency f of pulse producer is by R1, R2, C1 decision, and its computing formula is f=1.4/(R1+R2) C1 is if be controlled at oscillation frequency about 35K, and then the charge and discharge time of C1 is basic identical.The pulse that produces when pulse producer constantly drives radiating circuit to be made it when D3 produces infrared beam, because the effect of spacing resistance R 3, D3 can not damage by big electric current at short notice, directly reaches the input end of infrared receiving set from the infrared beam of D3 generation.

Infrared receiving set is made up of IC2, R4, R5, R6, C3, C4, C5, C6, C7, L1, D4.Because the parameter of inductance L 1 and capacitor C 5 is selected on the transponder pulse frequency of infrared transmitter, the resonance frequency that makes it infrared receiver is identical with the transmission frequency of infrared transmitter, so the D4 conductive current changes after infrared beam that upper level D3 sends is received by D4, make IC2 7 pin that the feeble signal input be arranged, this signal is handled if its frequency has signal output with identical then IC2 1 pin of resonance frequency through IC2, otherwise does not just have.Owing to be of the form control at the corresponding levels output of higher level's radiating circuit, so in a single day IC2 1 pin has output signal just can directly be sent to the next stage amplifier input terminal with the pulsed infrared light beam.

Amplifier is made up of T1, R7, R8, R9.When upper level IC2 1 pin did not have input signal, the T1 collector output was zero, and when upper level IC2 1 pin had input signal, then T1 was amplified in collector to this signal and forms one and send into next stage near the pulse signal of supply voltage.

Wave detector is made up of D5, C8, R10, when higher level T1 current collection very zero.The D5 negative pole end also is zero to make it subordinate's hummer work and send the sound.Making the hummer input end when C8 is charged until supply voltage value rapidly by D5 when higher level T1 collector has the output pulse is high level, has cut off hummer sound source, makes it the work of hummer stop.

Hummer can be a short sound hummer, if its input end current potential is zero, then sends the sound, if for high level then interruption of work does not send the sound.

With reference to Fig. 3, infrared transmitter 2 and infrared ray reception 3 are installed in the same side of shell 1, and gap between the two is slightly larger than the thickness of securing band tongue.

When safety belt is not fastened if the utility model compared with prior art has the in a single day connection of following good effect power sources of motor vehicle, because infrared transmitter and infrared receiver are contained in the same side, so at areflexia object (safety belt tongue) when infrared beam is hindered, buzzer work, in case there is reflecting object (safety belt tongue) to insert when having blocked infrared beam between emitter and the receiver, buzzer then quits work, illustrate then that safety belt fastens this moment, thus the traffic accident that may cause when effectively having prevented the safety belt buckling free driving.

Claims (2)

1, a kind of reflection type infrared securing band prompting device, it has shell, direct supply, hummer is characterized in that it by infrared transmitter, infrared receiver, amplifier and wave detector are formed, wherein: the pulse producer that infrared transmitter is made of IC1, D1, D2, R1, R2, C1, C2 and formed by the radiating circuit that R3, D3 constitute, pulse constantly discharged and recharged by C1 when power circuit was connected, and made the D3 in the radiating circuit constantly send the infrared light beam pulse signal; Infrared receiver is made up of IC2, R4, R5, R6, C3, C4, C5, C6, C7, L1, D4, and after pulse signal that upper level radiating circuit D3 sends was received by D4, the output terminal of IC2 then had potential change; Amplifier is made up of T1, R7, R8, R9, amplifier has pulse-free signal output according to the current potential decision T1 collector of T1 base stage, the T1 collector is output as high level when the T1 base stage has input signal, and when the T1 base stage did not have input signal, the T1 collector was output as low level; Wave detector is made up of D5, C8, R10, and when previous stage T1 current collection very during low level, the D5 negative pole end also can make hummer work for low level, and when the integrated very high level of previous stage T1, the D5 negative pole end is a high level, and hummer is quit work.

2, reflection type infrared securing band prompting device according to claim 1 is characterized in that the infrared transmitter 2 and the infrared receiver 3 that are installed in the shell 1 are installed in the same side, and gap between the two is slightly larger than the thickness of securing band tongue.

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