CN2435879Y

CN2435879Y - Optical triggering electronic time-control switch

Info

Publication number: CN2435879Y
Application number: CN 00241787
Authority: CN
Inventors: 张盛忠
Original assignee: XIGEMA GROUP CO XINJIANG
Current assignee: XIGEMA GROUP CO XINJIANG
Priority date: 2000-07-08
Filing date: 2000-07-08
Publication date: 2001-06-20
Anticipated expiration: 2010-07-08

Abstract

The utility model provides an optical triggering electronic time-control switch, which is controlled to be used for outdoor lighting. The utility model comprises a power supply circuit, an optical triggering circuit, a timing circuit and a driving circuit, wherein, the optical triggering circuit controls the work of the whole circuit; the timing circuit determines the action of the driving circuit. During the daytime, the whole circuit is under the waiting state and stops work, and the driving circuit does not carry out action; during the nighttime, the optical triggering circuit starts the timing circuit and the driving circuit to start working; when the timing circuit starts timing and reaches the set time, the timing circuit outputs a stop signal, making the driving circuit to cut off the power supply for load.

Description

The light triggered electronic time switch

The utility model relates to a kind of outdoor lighting control switch, especially can be according to naturally light and the time that self sets, and the automatic light triggered electronic time switch that the power supply of load is controlled.

At present, general outdoor lighting control method has two classes: a class is by the method for artificial push-and-pull switch the power supply of load to be controlled, and this method is subjected to artificial cause influence bigger, relatively backward.Another kind of is automatic control, dual mode is wherein arranged again: a kind of is to utilize light-operated automatic control switch, it be available light by induced environment come automatic control load power supply whether, though can removing manual operation from, this method realizes control automatically, but, it places one's entire reliance upon natural night and daytime, can't satisfy those night do not need to provide for a long time power supply the field what.Another kind of mode is to adopt time controller control, mode was moved when this time controller was walked according to 24 hours of time clock and watch fully, come break-make control is carried out in load by the artificial disposable make-and-break time that configures, its shortcoming is to adapt to the requirement that the load controlled changed the seasonal time automatically, and when in a single day its working power occurs falling, can occur out of control.

The purpose of this utility model provides a kind of light triggered electronic time switch, it can not only realize the power supply of load is controlled automatically, and its control that realizes is to carry out according to the available light of environment and the time double action of self setting, and be not subjected to power supply power-fail and the influence of seasonal time difference, be adapted to night need provide the illumination of certain hour or power supply the field what, help saves energy.

The purpose of this utility model is to realize like this, in circuit, the square wave of the certain frequency that pierce circuit is produced with multidigit binary string linage-counter carries out frequency division, through after the regular hour, in the end the output of a digit counter obtains corresponding signal, and this signal is again through the get on action of control Driver Circuit of the input that is added in drive circuit after the processing of NAND gate circuit.And pierce circuit also is subjected to the control of the signal that optical trigger sends, in the daytime, because the effect of optical trigger makes the pierce circuit failure of oscillation, after arriving night, optical trigger is promptly sent a control signal, on the one hand, this control signal starts the pierce circuit vibration, timing circuit picks up counting simultaneously, on the other hand, this control signal also has been added to the input of drive circuit, but since this moment timing circuit timing time not to and no signal is sent, so just make drive circuit move, the power supply circuits of load are switched on.Reached the time of setting when timing circuit after, its output will be exported a high level signal, this signal forms low level and is added in the input of drive circuit after NAND gate circuit is handled, thereby makes drive circuit close the power supply circuits of load, realizes the function of regularly turn-offing.Optical trigger adopts photo resistance induced environment light, cooperates the processing of the functional circuit that components and parts such as comparator form again, obtains the required control signal of circuit.The dc supply of entire circuit directly from the input of ac control power supply through the transformer step-down and behind rectifying and wave-filtering and obtain.

Owing to adopt such scheme, the control of photocontrol and time is combined dexterously, and circuit structure is simple, the components and parts number is few, cost is low, need not the complicated operations program, be easy to produce and apply.

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing is circuit theory diagrams of the present utility model.

Among the figure: JK is the relay normally open contact switch, and J is a relay, and FUSE is a fuse, and B is a power transformer, and DW is a voltage stabilizing didoe, and LED is a light-emitting diode, and RP is photo resistance, and W is a potentiometer; In the label of combination of numbers: T is a triode, and R is a resistance, and C is an electric capacity, and D is a diode, and IC is an integrated circuit; INPUT is a power input, and OUTPUT is a power output end, and test is a test lead.

In the drawings, the 220V alternating current is gone into from the INPUT termination, and power transformer also is connected on the alternating current through fuse FUSE, and the 220V alternating current is after the transformer step-down, by the D1-D4 rectification, C1 is filtered into circuit that dc supply is provided.LED is that to use light-emitting diode, R0 be the current-limiting resistance of LED for power supply indication.For circuit is reliablely and stablely worked, in working power circuit, increase the voltage stabilizing circuit that R1, DW, C2 form again and done further voltage stabilizing, wherein: DW is a voltage stabilizing didoe, and R1 is the current-limiting resistance of DW, and C2 is a filter capacitor; Comparator IC1, photosensitive resistor rp, triode T1, capacitor C3 and resistance R 2-R12 form optical trigger, wherein: IC1: C, R2, R3 provide a control high level signal for optical trigger, R4 and photo resistance constitute bleeder circuit, IC1: B, R5, R6 constitute the threshold circuit of light triggering signal, R7, R8, C3 constitute delay circuit, in order to eliminate the interference of light at random, IC1: A, R9, R10 constitute the output circuit of light triggering signal, and T2, R11, R12 constitute the control circuit of timing circuit; IC2, IC3, IC4, R14, R15, W, C4 form timing circuit, wherein: IC3, R14, R15, W, C4 constitute square wave oscillation circuit and preceding 14 grades of counting frequency dividing circuits, R14, R15, W, C4 are the external RC network of oscillator, regulate W and can change vibration frequency, IC4 constitutes back 14 grades of counting frequency dividing circuits of timing circuit, and IC2 constitutes the signal output processing circuit of timing circuit; T2, J, D5, D6, R13 form drive circuit, and D5 is an isolating diode, D6 be the emitter junction clamping diode of T2 in order to raising the base stage operating voltage of T2, R13 be current-limiting resistance and the IC2 of T2: A the input/output terminal isolation resistance, J is a control relay.In the circuit, IC2 selects the cmos nand gate integrated circuit for use, and IC3, IC4 select 14 binary string linage-counter 4060 integrated circuits of CMOS for use.In the daytime, photosensitive resistor rp is subjected to be low resistive state than the effect of high light line, make IC1: B in-phase input end 5. the pin level be lower than 6. pin level of inverting input, in 7. pin output low level of output, thereby make light triggering signal output circuit IC1: the output of A is the pin output low level 1., this low level is leaded up to R13 and is added in the input of drive circuit, another road ends T2 by the base stage that current-limiting resistance R11 is added in T2, on the T2 collector electrode, be high level, make the IC3 in the timing circuit, the public clear terminal of IC4 is a high level, forcing counter output all is the low level and the blocking of oscillator, like this, 2. pin output high level at NAND gate IC2: A, because the buffer action of isolating diode D5, the drive circuit input can not obtain this high level signal and the low level state that keeps being sent here by optical trigger, and drive circuit can not move.After arriving night, photo resistance is high-impedance state, the in-phase input end of IC1: B 5. pin level is higher than 6. pin level of inverting input, at 7. pin output high level, after the of short duration time-delay by delay circuit, at light triggering signal output circuit IC1: the output of A 1. pin is just exported high level, this high level is leaded up to R13 and is added in the input of drive circuit, make the drive circuit action, the relay adhesive, another road makes the T2 conducting by the base stage that current-limiting resistance R11 is added in T2, its collector electrode is low level, make IC3 in the timing circuit, the public clear terminal of IC4 is a low level, the oscillating circuit starting oscillation, and unison counter is started working, after reaching certain hour, the 12nd grade of counter output in IC4 1. pin will be exported a high level, and make NAND gate IC2: C is output as low level, IC2: B is output as high level, IC2: A is output as low level, thereby force the input of drive circuit also to be low level, drive circuit is resetted quit work, relay disconnects.In timing circuit, because the 12nd grade of counter of IC4 and the output of the 13rd grade of counter are the relations of NAND, so, even the 12nd grade of rolling counters forward of IC4 finishes, drive circuit also continues to keep being failure to actuate, after arriving daytime, entire circuit is in wait state and quits work.

Claims

1. light triggered electronic time switch, form automatic control circuit by electronic devices and components and replace manual operation, realization is to the automatic control of electric, it is characterized in that: be provided with optical trigger and timing circuit in electronic circuit simultaneously, switch is controlled by the time of its internal timing circuit again to the control that the power supply of load control promptly is subjected to detect the optical trigger of external environment condition light.

2. light triggered electronic time switch according to claim 1 is characterized in that: the optical trigger that detects external environment condition light is made up of comparator (IC1), photo resistance (RP), triode (T1), time delay network (R7, R8, C3) and the peripheral resistive element that matches with circuit.

3. light triggered electronic time switch according to claim 1 is characterized in that: its inner timing circuit is made of two 14 binary string linage-counters (IC4, IC5) and NAND gate circuit (IC2) that have oscillator.

4. light triggered electronic time switch according to claim 3 is characterized in that: 14 binary string linage-counters (IC4, IC5) and NAND gate circuit (IC2) are the CMOS integrated circuit.