CN2075404U - Universal photoelectric auto-switch - Google Patents

Abstract

The utility model relates to a universal photoelectric automatic switch which automatically switches on or switches off an electric-supply load circuit. The universal photoelectric automatic switch is particularly used for the public lighting of the roadway light, the floor, the factory, and the goods yard, and the occasions which needs to control the switching of the electric source according to the light irradiation degree. The utility model is composed of a casing, an indicating light, a low-voltage direct-current unit, a reference voltage regulator, a photoelectric-signal receiving component, a threshold-voltage forming circuit, the discrimination circuit of the threshold trigger signal, and an operating mechanism. The switch motion can be accurately, rapidly and instantly finished at once, and the electric-supply load circuit can be switched off or switched on when the required illumination intensity is obtained according to the variation of the definite illumination and the natural light ray.

Description

Universal photoelectric auto-switch

The utility model relates to one to the general photoelectricity automatic switch that turns on and off automatically of power supply loaded line, especially for to street lamp, floor public illumination and the occasion that changes to the illumination extent control on/off of needs according to light.It is made up of casing, indicator light, low-voltage DC source unit, photosignal receiving-member and actuator.

At present, the street lamp of avenue, highway, enterprises and institutions, and the on/off of other public lighting are commonly Artificial Control, often cause the control time inaccurate, cause the waste of manpower, electric power.And general existing optoelectronic switch is subject to environmental interference and instability, service condition requires high, under changing very slowly situation, luminous ray realizes requiring under certain intensity of illumination accurately, fast, finish relatively difficulty of switch motion in moment reliably, switch critical discontinuous in the operating state break-make change procedure is back and forth beated." the household electrical appliance light-operated switch " put down in writing in Chinese patent GG87207558 is a kind of light-operated switch that is used for household electrical appliance, be suitable for the remote light-operated shutdown of television set, be lower than in ambient light illumination under the condition of 100 luxs and be connected use with household electrical appliance, adopt photodiode as light-receiving member, with light and flashlight light off signal, turn-off the household electrical appliance power supply as reflector." light-operated switch " put down in writing in Chinese patent GG87210825 comprises the photosignal receiving-member, electronics amplifier unit, an auxiliary relay and a control relay.Adopt phototriode as the photosignal receiving-member, equally also be to use daily flashlight as optical signal generator, also can only play the effect of power cutoff, they all can only move under than the effect of high light (torch light), and can not realize under visible light changes very slowly situation that accurately and rapidly moment finishes switch motion, thereby turn on and off power supply.

The purpose of this utility model be to design one simple in structure, easy for installation, highly versatile, make reflector without light or torch light, and under light changed very slowly situation, moment was finished the general photoelectricity automatic switch that the power supply loaded line was cut off or connected in switch motion accurately and rapidly can to adjust on demand illuminance.

The general photoelectricity automatic switch of the utility model has casing 11, indicator light ZD12 and low-voltage DC source unit 21, photoelectricity receiving-member 23 and actuator 26, it also has one by electric rough piece R1, potentiometer W, the reference voltage regulator 22 that resistor R 2 is composed in series, be connected to the output of low-voltage DC source unit 21 by the other end of resistor R 1, R2, at the travelling arm E of the potentiometer W end and the photoelectricity receiving-member 23 of connecting between the F of resistor R 4 holds, the travelling arm of regulator potentiometer W is regulated conversion reference voltage arbitrarily, thereby adjusts the switch motion time; It also has one with resistor R3, R4, R5, R6, R7, R8, what the threshold voltage that capacitor C2 and transistor BG1, BG2 form formed that circuit 24 and one is connected with the output of BG2 collector electrode is connected into the threshold values triggering signal discriminator circuit 25 of Schmidt circuit function by integrated circuit (IC), and threshold voltage forms F that circuit 24 passes through resistor R 4 and holds and be connected with photosignal receiving-member 23.

Photoelectricity receiving-member 23 of the present utility model adopts the photo resistance R that places in the plastic tube, is connected to E, F point by its two ends lead-in wire, adjusts the position-adjustable switch motion time of photo resistance R in plastic tube.

The general photoelectricity automatic switch of pressing the utility model design is simple in structure, easy to install, illuminance by-pass cock operate time that can be as required, be not subjected to external interference, reliable operation, can moment once finish switch motion under the situation very slowly in the light variation, cut off or connect load circuit.

The utility model has following accompanying drawing:

Fig. 1 is the profile schematic diagram of general photoelectricity automatic switch.

Fig. 2 is the photoelectricity receiving-member of general photoelectricity automatic switch longitudinal sectional view when installing.

Fig. 3 is the circuit block diagram of general photoelectricity automatic switch.

Fig. 4 is the circuit theory diagrams of general photoelectricity automatic switch.

Embodiment of the present utility model is described with reference to the accompanying drawings.Fig. 1 is the profile schematic diagram of the present embodiment, shell 11 usefulness sheet metals wash away and form, be provided with 4 installing holes 17, can it be fixed on the switchboard by bolt, an indicator light ZD12 is housed on the panel of shell 11, whether its bright, the indication power supply load circuit that goes out are connected, the three phase network circuit is inserted by entrance hole 13, loaded line is inserted by wire hole 14, respectively three lead-in wires of entrance hole 13 and wire hole 14 are connected in parallel as single-phase when control, null line hole 15 inserts zero-power line, and photosignal is inserted by signal input hole 16.The printed wiring board that is assembled by according to circuit block diagram shown in Figure 3 and circuit theory diagrams shown in Figure 4 is installed in the shell 11.Low-voltage DC source unit 21 is made up of transformer B, crystal diode D, capacitor C1, and the alternating current 220V voltage that is connected into from electrical network inlet wire and zero line is by the operating voltage of output (capacitor C1 two ends) the output direct current 12V of this unit.Reference voltage regulator 22 is in series by resistance R 1, potentiometer W, resistor R 2, be connected in parallel in the output of low-voltage DC source unit 21 by the other end of resistor R 1, R2, the illuminance by-pass cock operate time that the travelling arm E end of regulator potentiometer W can be as required.Photoelectricity receiving-member 23 adopts MG-13 type photo resistance R, in the plastic tube 42 with its φ 20 that packs into, the two ends of photo resistance R are connected to the E end of reference voltage regulator 22 and the F end that threshold voltage forms circuit 24 respectively by lead, as shown in Figure 2 it is installed on and is not subjected to the light direct irradiation, but can receive the place that illuminance changes, for example shown in Figure 2,41 is wall, 42 is plastic tube, R is photo resistance, the two ends lead-in wire is by signal input hole 16 line attachments on the casing 11, and photo resistance R can move forward and backward in plastic tube 42, adjusts the front and back position scalable switch motion time of R in plastic tube 42.Threshold voltage is formed into road 24 and is made up of the amplifying circuit that resistor R 3, R4, R5, R6, R7, R8, capacitor C2 and transistor BG1, BG2 are connected into, emitter link access resistor R 5 at BG1, BG2 makes circuit constitute positive feedback, the signal that photo resistance R causes according to the variation of intensity of illumination changes through the F of resistor R 4 end to be introduced, amplify paraphase through BG1, amplify the collector electrode delivery valve threshold voltage of paraphase through BG2 again, offer threshold values triggering signal discriminator circuit 25 at BG2.Threshold values triggering signal discriminator circuit 25 usefulness 555 integrated circuit (IC) are connected into the Schmidt circuit function, this circuit has two stable states, trigger IC from the threshold voltage of BG2 collector electrode output and become another stable state, turn on and off load circuit from the output control executing mechanism 26 of IC from a stable state.The 26 usefulness JXT-10 type miniature relay J of actuator, it has three normally opened contact JK1～3, receive respectively on electric network source and the electric circuit at the each point two ends, because the adhesive of relay J or release make JK1～3 closed or disconnect, thereby the electric circuit is switched on or disconnects.As when light illumination bright when reaching the illuminance of need turn-offing by secretly changing to (regulating travelling arm E end or acquisition is preset in the position of mobile photo resistance R in plastic tube 42) by reference voltage regulator 22, because the resistance value of photo resistance R thereupon from large to small, the input current that makes threshold voltage form circuit 24 increases, the base voltage that is BG1 becomes big, through BG1, BG2 amplifies, make high threshold voltage of BG2 collector electrode output, make IC keep the stable state of an output low level, this low level deficiency is so that the relay J adhesive, JK1-3 is released, thereby make the loaded line outage, street lamp or lighting apparatus power supply are turned off, and the indicator light ZD12 on the casing 11 does not work simultaneously; Otherwise, when light illumination by bright when changing to required control dark, the resistance value of photo resistance R increases thereupon, lower threshold voltage of BG2 collector electrode output, this voltage makes IC that the stable state that upset becomes the output high level take place, the high level of IC output makes the relay J action, adhesive JK1-3 connects loaded line, street lamp or lighting apparatus are switched on, indicator light ZD12 on the casing 11 is bright simultaneously, the indication loaded line is switched on, thereby reaches the purpose that as required illuminance turns on and off loaded line.The travelling arm of the potentiometer W of the reference voltage regulator 22 in the switch motion time scalable casing on the wiring board, or directly adjust the front and back position of photo resistance R in plastic tube 42.The load of the utility model control surpasses 3 kilowatt hours, can use by external A.C. contactor, and A.C. contactor can be selected according to actual load.Present embodiment control action time≤1 second, consumable power :≤1.5 watts of control power supplies ,≤0.15 watt of control outage.

Claims (2)

1, general photoelectricity automatic switch, it is by casing 11, indicator light ZD12, and low-voltage DC source unit 21, photoelectricity receiving-member 23 and actuator 26 form, and it is characterized in that:

A) there is one to be composed in series by resistor R 1, potentiometer W, resistor R 2, the other end by R1, R2 is in parallel with low-voltage DC source unit 21 outputs, the travelling arm E end of potentiometer W is connected with an end of photoelectricity receiving-member 23, and the travelling arm of regulator potentiometer W gets final product the reference voltage regulator 22 of conversion reference voltage;

B) also have one to form, threshold voltage formation circuit 24 and the threshold values triggering signal discriminator circuit 25 that is connected with transistor BG2 collector electrode by the input that is connected into the integrated circuit (IC) of revolving close special circuit function that the end by R4 is connected with the other end F point of photoelectricity receiving-member 23 with resistor R3, R4, R5, R6, R7, R8, capacitor C2 and transistor BG1, BG2.

2,, it is characterized in that photoelectricity receiving-member 23 adopts the photo resistance R that places in the plastic tube and can move forward and backward the position adjustments switch transition time in pipe by the described general photoelectricity automatic switch of claim 1.

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