CN2191510Y

CN2191510Y - Acoustooptic controlled automatic switch

Info

Publication number: CN2191510Y
Application number: CN 94210020
Authority: CN
Inventors: 杜庆贵; 范文忠; 宋旭春; 宋维贵
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-23
Filing date: 1994-04-23
Publication date: 1995-03-08
Anticipated expiration: 2004-04-23

Abstract

Disclosed is an acoustic optic controlled automatic switch used for lighting lamps, in particular to lighting lamps in nonresidential places, comprising an electrical source, a rectification circuit, an acoustic optic receiving circuit, a triggering control circuit and a silicon-controlled switch. The triggering control circuit adopts four groups of two-end input NAND gate digital circuits; only when the acoustic optic receiving circuit provides high electrical level simultaneously for the digital circuits, the digital circuits can trigger the controlled silicon to switch on a lamp. The utility model has the advantages of strong stability, low cost, simple circuit, remarkable power saving and convenient operation; the utility model can be used for places where combustible articles and explosive articles are put.

Description

Acoustooptic controlled automatic switch

A kind of illuminating lamp that is used for is the acousto-optic control automatic switch of non-inhabitation place illuminating lamp especially.

In the prior art, at non-inhabitation place such as stair, public places such as toilet, the mechanical contact formula switch of the many employings of illuminating lamp, this switch in use, must come direct control by the people, when light is dark, uses inconvenience, as forget and turn off the light, lamp is then bright always, quite the waste electric energy is established spring in the mechanical in addition contact formula switch, therefore the moment of turning on light, contact can produce mechanical oscillation, cause the 220V supply voltage to produce the pulsation high pressure, cause between contact and strike sparks, this life-span to switch itself and light fixture all brings certain influence, and opening, close moment, can produce the spark between contact, therefore have inflammable, should not use in the environment of explosion hazard gases, and can overcome in some sonic-opticalcon trolled switch design of mechanical contact formula switch defective, some circuit uses transformer, so its cost height, small product size is big, brings inconvenience for actual installing and using; With the design of transformer, circuit turnover line is not many for other, uses inconvenient yet; Circuit adopts discrete component in a large number in the existing in addition acousto-optic control automatic switch design, so the discreteness of circuit is bigger, unstable properties, and actual production is made troubles.

The purpose of this utility model is to provide a kind of can overcome mechanical contact formula switch and existing acousto-optic control automatic switch design defect, and volume is little, and the turnover line is few, the acousto-optic control automatic switch of stable performance.

The technical solution of the utility model is, this acousto-optic control automatic switch is by power supply, bridge rectifier, sound and optical receiving circuit, trigger control circuit, reverse-blocking tetrode thyristor constitutes, power supply is powered to each several part by rectification circuit, circuits for triggering adopt four groups of two ends input nand gate digital circuits of serial connection successively, this circuit input end connects the output of sound and optical receiving circuit respectively, trigger the trigger end of the output termination reverse-blocking tetrode thyristor of control figure circuit, optical receiving circuit is formed by negative photo resistance and another resistance serial connection, its node is the output of this circuit, the sound receiving circuit is formed a cascode loop by microphone and triode, and the current collection of triode is the output of this circuit very.This switch is under the lamp effect, and negative photo resistance makes the digital circuit that constitutes trigger control circuit can't export high level, and controllable silicon is in cut-off state, and bulb does not work.When not having lamp, negative photo resistance provides high level for an input of digital circuit, as long as when the audio signal of 20-30 decibel is arranged, sound and optical receiving circuit acting in conjunction make digital circuit output high level, the controllable silicon conducting, and bulb is bright.As long as and light and sound receiving circuit have one can not provide high level for digital circuit, controllable silicon all is in cut-off state.In digital circuit, can establish delay circuit, can keep after a period of time from breath so that lamp is bright.

The acousto-optic control automatic switch that the utility model provides, trigger control circuit adopts four groups of two ends input nand gate digital circuits of serial connection successively, simplified control circuit greatly, reduced cost, improved the stability of circuit, this switch uses easily, when no light source, as long as on 2 meters on distance switch with the interior audio signal of 20-30 decibel that produces (as voice, footsteps etc.) time, switch can start automatically, after voice signal disappears, can automatically shut down electronic switch simultaneously, need not Artificial Control, owing to having under the situation of light source, light fixture can be not luminous, and electricity saving performance is remarkable, and light fixture is by powered by direct current, stability is high, can prolong the life-span of bulb, this switch no-spark produces in addition, can be installed in inflammable, in the environment of explosives.

The utility model has following accompanying drawing.

Fig. 1 is a logic block-diagram.

Fig. 2 is an embodiment electrical schematic diagram.

As shown, this switch is by power supply, bridge rectifier, sound and optical receiving circuit, trigger control circuit, reverse-blocking tetrode thyristor MCR constitutes, power supply is the each several part power supply by bridge rectifier, trigger control circuit adopts four groups of two ends input nand gate digital circuits of serial connection successively, this circuit input end connects the output of sound and optical receiving circuit respectively, trigger the trigger end of the output termination reverse-blocking tetrode thyristor MCR of control figure circuit, optical receiving circuit is formed by negative photo resistance Rg and another resistance R 4 serial connections, its node is the output of this circuit, the sound receiving circuit is formed a cascode loop by microphone MIC and triode BG, and the current collection of triode BG is the output of this circuit very.As long as after having the audio signal of 20-30 decibel to be received, amplify, be defeated by high level of digital circuit through triode BG by microphone.In the optical receiving circuit, voltage after the rectification step-down is by voltage regulation filtering, obtain a signal voltage by resistance R 4, when lamp, negative photo resistance resistance reduces, thereby adds to digital circuit one low level, so both made the audio signal input, because the existence of four group of two input nand gate digital circuit is arranged, can't make digital circuit output high level, controllable silicon can not conducting.When no lamp, negative photo resistance resistance increases, thereby add to digital circuit one high level, when sound and optical receiving circuit output are high level simultaneously, digital circuit output high level, thus trigger voltage of controllable silicon given, and controllable silicon is in conducting state, whole full-bridge forms the loop with it, and lamp is bright.Extinguish in order to make bright can the continuing for some time again of lamp, in digital circuit, be added with delay circuit, delay circuit is made of the resistance R 3 of the capacitor C 2 of parallel connection, the output of one termination rectification circuit, the tie-point of forward and backward two groups of NAND gate in another termination digital circuit, when preceding two groups of NAND gate are exported high level in the digital circuit, give capacitor C 2 chargings, then again by resistance R 3 discharges, high level is provided for the input of the two groups of NAND gate in back in the digital circuit, make controllable silicon MCR conducting, the numerical value decision controllable silicon ON time of capacitor C 2 and resistance R 3.In order to prevent that resistance R 3 can unidirectionally be the two groups of NAND gate discharges in back in the digital circuit in the delay circuit, before digital circuit two groups of NAND gate outputs and be positioned at delay circuit before be added with a diode D6, the negative pole of diode D6 connects the preceding two groups of NAND gate outputs of digital circuit.

Claims

1, a kind of illuminating lamp that is used for, be the acousto-optic control automatic switch of non-inhabitation place illuminating lamp especially, by power supply, bridge rectifier, sound and optical receiving circuit, trigger control circuit, reverse-blocking tetrode thyristor MCR constitutes, power supply is the each several part power supply by bridge rectifier, it is characterized in that: trigger control circuit adopts four groups of two ends input nand gate digital circuits of serial connection successively, this circuit input end connects the output of sound and optical receiving circuit respectively, trigger the trigger end of the output termination reverse-blocking tetrode thyristor MCR of control figure circuit, optical receiving circuit is formed by negative photo resistance Rg and another resistance R 4 serial connections, its node is the output of this circuit, the sound receiving circuit is formed a cascode loop by microphone MIC and triode BG, and the current collection of triode BG is the output of this circuit very.

2, switch as claimed in claim 1, it is characterized in that: in digital circuit, be added with delay circuit, delay circuit is made of the capacitor C 2 and the resistance R 3 of parallel connection, the output of one termination rectification circuit, the interface of forward and backward two groups of NAND gate in another termination digital circuit.

3, switch as claimed in claim 1 or 2 is characterized in that: before digital circuit two groups of NAND gate outputs and be positioned at delay circuit before be added with a diode D6, the negative pole of diode D6 connects the preceding two groups of NAND gate outputs of digital circuit.