CN208939917U

CN208939917U - A kind of anti-tampering light-controlled switching circuit

Info

Publication number: CN208939917U
Application number: CN201821721492.3U
Authority: CN
Inventors: 马二华; 林璐
Original assignee: Shenzhen Kelong Power Technology Co Ltd
Current assignee: Shenzhen Kelong Power Technology Co Ltd
Priority date: 2018-10-23
Filing date: 2018-10-23
Publication date: 2019-06-04
Anticipated expiration: 2028-10-23

Abstract

The utility model discloses a kind of anti-tampering light-controlled switching circuits, including internal stepdown circuit, the internal stepdown circuit is in series with hysteresis loop comparator, bleeder circuit is parallel between the internal stepdown circuit and hysteresis loop comparator, the hysteresis loop comparator is in series with light-sensitive device, the hysteresis loop comparator series connection delay circuit, and the delay circuit is in series with switching circuit, the switching circuit in series relay, the relay connect lamps and lanterns.The utility model, which has shutdown delay function, to be prevented from interfering, and designs the brightness of simple and settable turn-on and turn-off.

Description

A kind of anti-tampering light-controlled switching circuit

Technical field

The utility model relates to field of circuit control, in particular to a kind of anti-tampering light-controlled switching circuit.

Background technique

It is to illuminate road at night or darker environment, needs to control the switch of lamp, however often because of pole in reality Street lamp can not be opened in time in the case where the weather of end, will cause the inconvenience of people's life, and may cause the hair of some accidents It is raw, it now needs a product that can be switched on and off lamps and lanterns according to the brightness of external environment and achievees the effect that a control switch, And encountering strong luminous time controller at night can identify, without will receive interference, can continue the normal work for controlling lamp.

Utility model content

In order to overcome the drawbacks described above of the prior art, the utility model provides a kind of anti-tampering light-controlled switching circuit, this is anti- Interference light-controlled switching circuit, which has shutdown delay function, to be prevented from interfering, and designs the brightness of simple and settable turn-on and turn-off.

The technology employed by the present utility model is a kind of anti-tampering light-controlled switching circuit, including internal stepdown circuit, The internal stepdown circuit is in series with hysteresis loop comparator, and partial pressure electricity is parallel between the internal stepdown circuit and hysteresis loop comparator Road, the hysteresis loop comparator are in series with light-sensitive device, the hysteresis loop comparator series connection delay circuit, and the delay circuit is in series with Switching circuit, the switching circuit in series relay, the relay connect lamps and lanterns.

As a preferred embodiment of the present invention, the hysteresis loop comparator uses operation amplifier circuit.

As a preferred embodiment of the present invention, the voltage after the reduction voltage circuit decompression is 12V.

As a preferred embodiment of the present invention, the internal stepdown circuit uses constant pressure chip.

Compared with prior art, the utility model has following technical effect that

The utility model proposes a kind of anti-tampering light-controlled switching circuit, which takes electricity by input voltage, passes through It crosses internal stepdown circuit and provides 12V power supply and reference voltage to amplifier, the variation characteristic according to light-sensitive device by light conditions And the illumination that is switched on and off of relay is set, and to the control signal of relay carry out delay and and hysteresis loop comparator, reach Prevent the purpose of interference.

Detailed description of the invention

Fig. 1 is a kind of structure chart of anti-tampering light-controlled switching circuit of the utility model；

Fig. 2 is a kind of circuit diagram of anti-tampering light-controlled switching circuit of the utility model；

Fig. 3 is the circuit diagram of internal stepdown circuit in a kind of anti-tampering light-controlled switching circuit of the utility model；

Fig. 4 is the circuit diagram of bleeder circuit in a kind of anti-tampering light-controlled switching circuit of the utility model；

Fig. 5 is the circuit diagram of hysteresis loop comparator in a kind of anti-tampering light-controlled switching circuit of the utility model；

Fig. 6 is the circuit diagram of delay circuit in a kind of anti-tampering light-controlled switching circuit of the utility model；

Fig. 7 is the circuit diagram of switching circuit in a kind of anti-tampering light-controlled switching circuit of the utility model.

Figure label: 1- internal stepdown circuit；2- hysteresis loop comparator；3- bleeder circuit；4- light-sensitive device；5- delay electricity Road；6- switching circuit；7- relay；8- lamps and lanterns.

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.It should be noted that The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This Outside, technical characteristic involved in the utility model embodiment disclosed below as long as they do not conflict with each other can To be combined with each other.

A kind of anti-tampering light-controlled switching circuit 6 as shown in Figure 1:, including internal stepdown circuit 1, the internal stepdown circuit 1 It is in series with hysteresis loop comparator 2, bleeder circuit 3, the hysteresis are parallel between the internal stepdown circuit 1 and hysteresis loop comparator 2 Comparator 2 is in series with light-sensitive device 4, the series connection of hysteresis loop comparator 2 delay circuit 5, and the delay circuit 5 is in series with switch electricity Road 6,6 series relay 7 of switching circuit, the relay 7 connect lamps and lanterns 8.

12V power supply is provided by internal reduction voltage circuit after power on circuitry, provides reference voltage by bleeder circuit 3, and Compared with the voltage variety of light-sensitive device 4 carries out hysteresis.It is delayed using delay circuit 5, then comparison signal by opening Powered-down road 6 controls relay 7, and the light on and off of lamp are reached by the turn-on deadline that relay 7 switches the input line of internal stepdown circuit 1 Control.

As shown in Fig. 2-7: light-controlled switching circuit 6 exports 12V voltage to fortune by the reduction voltage circuit of U1 constant pressure chip composition It calculates amplifier and relay 7 is powered, and generate a reference voltage (REF) and light-sensitive device 4 and R11 by R9 and R10 partial pressure, The bleeder circuit 3 of R13 carries out hysteresis comparison (U2B with R12, R14 and detection voltage and REF are formed), using light-sensitive device 4 because The characteristic that brightness variation electrical characteristic changes therewith, is arranged the conducting voltage (bright light voltage) of relay 7, and provides hysteresis ratio Compared with the setting hysteresis voltage of device 2 and it is the shutdown voltage (voltage of turning off the light) of relay 7, is formed by D3, R15, R16, R17, EC5 Delay circuit 5 is delayed, and achievees the effect that shutdown delay, which can avoid turning off phenomenon caused by moment bright light.And lead to Control reverser (U2A) Reverse Turning Control Q1 triode operation in switching circuit 6 is crossed, to reach the effect of the conducting shutdown of relay 7 Fruit.The turn-on deadline for the input line that lamps and lanterns 8 and the total N line of light-operated switch switch internal stepdown circuit 1 by relay 7 reaches lamp Light on and off control.

Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims

1. a kind of anti-tampering light-controlled switching circuit, it is characterised in that: including internal stepdown circuit, the internal stepdown circuit series connection There is hysteresis loop comparator, bleeder circuit, the hysteresis loop comparator string are parallel between the internal stepdown circuit and hysteresis loop comparator It is associated with light-sensitive device, the hysteresis loop comparator series connection delay circuit, the delay circuit is in series with switching circuit, the switch electricity Road series relay, the relay connect lamps and lanterns.

2. a kind of anti-tampering light-controlled switching circuit according to claim 1, it is characterised in that: the hysteresis loop comparator uses Operation amplifier circuit.

3. a kind of anti-tampering light-controlled switching circuit according to claim 1, it is characterised in that: the bleeder circuit and hysteresis The voltage of comparator is 12V.

4. a kind of anti-tampering light-controlled switching circuit according to claim 1, it is characterised in that: the internal stepdown circuit is adopted With constant pressure chip.