CN2528162Y - Optical control switch for road lamp - Google Patents

Abstract

A photoswitch used for a street lamp belongs to a noncontact AC electronic switch, especially relating to a switch that can automatically turn on and off the street lamp based on environment illumination intensity. The photoswitch comprises an AC noncontact switch circuit composed of a bridge-type rectifier and a controllable silicon Q1, a power supply circuit connected in series by a resistance R4 and a capacitance C1, a photo-electric signal converting circuit connected in series by a resistance R1 and a photoresistance RT, a photo-electric signal amplifier circuit composed of a 4-value NAND gate integrated circuit, whose output terminal is connected with the control terminal of Q1 through a resistance R3, and a delay circuit composed of a capacitance C2, a resistance R2 and a diode D5. When the environment illumination intensity weakens to a certain value, IC will output high electric potential to break over Q1 and communicate an intermediate relay or other switch apparatus to turn on the street lamp. When the environment illumination intensity rises to a certain value, IC will output low electric potential to close Q1 to turn off the street lamp. The photoswitch can both guarantee illumination intensity and prevent electric power waste.

Description

The street lamp light-operated switch

Technical field

The utility model belongs to contactless electronic AC switch, particularly a kind of light-operated switch of controlling the street lamp switching according to ambient lighting intensity automatically.

Background technology

Timing routine control is generally adopted in the automatic control that street lamp is opened and closed at present, and its shortcoming is to open and close street lamp flexibly according to the illumination variation that weather is rain or shine produced, and causes the not enough or waste electric power of illumination in some cases.

The utility model content

The purpose of this utility model provides a kind ofly controls the light-operated switch that street lamp opens and closes automatically according to ambient lighting intensity, overcomes the shortcoming of above-mentioned timing routine control.The technical solution of the utility model is: light-operated switch comprises the AC contact-less switch circuit that a bridge rectifier of being made up of four diode D1-D4 and controllable silicon Q1 form, and two of this diode bridge rectifier D1-D4 exchanges end A, B and connects auxiliary relay or other switching device that the control street lamp opens and closes; One filter capacitor C1 anode provides the work of this light-operated switch required positive voltage by the power circuit that is connected in above-mentioned diode bridge rectifier D1-D4 two dc terminal after dropping resistor R4 and the filter capacitor C1 series connection again, and negative terminal provides ground reference; One by the light-converting electrical signal circuit that is connected to again after divider resistance R1 and the photo resistance RT series connection between positive voltage and the ground; The light that is made of four a NAND gate integrated circuit chip IC-signal of telecommunication amplifies and control circuit, input 6 pin of this integrated circuit chip connect the tie point of above-mentioned light-converting electrical signal circuit divider resistance R1 and photo resistance RT, introduce the voltage signal of reflection illumination variation, output 11 pin of this integrated circuit chip are connected to the control end of above-mentioned controllable silicon Q1 by current-limiting resistance R3, the break-make of control AC contact-less switch circuit; One by the delay capacitor C2 and the time delay resistance R2 that are parallel between positive voltage and said integrated circuit sheet 12,13 pin, and just is being terminated at said integrated circuit sheet 12,13 pin, and negative terminal is connected to the delay circuit that the diode D5 between integrated circuit chip 4 pin is formed.When ambient lighting weakened to certain value, the resistance of photo resistance RT increased to certain value, and the 6 pin current potentials of integrated circuit chip IC raise, after the two-stage NAND gate, 11 pin output high potential makes controllable silicon Q1 conducting, and light-operated switch is connected auxiliary relay or other switching device, and street lamp is opened; When ambient lighting increases to certain value, the resistance of photo resistance RT is reduced to certain value, and the 6 pin current potentials of integrated circuit chip IC reduce, and 11 pin output electronegative potential ends controllable silicon Q1, light-operated switch disconnects auxiliary relay or other switching device, and street lamp is extinguished.The effect of delay circuit is when ambient lighting is in the switch critical point, suitably postpones switch motion, avoids the street lamp flicker.Since the utility model fully according to ambient lighting intensity control automatically street lamp bright, go out, so can guarantee illumination, electric power can avoid waste again.

Description of drawings

Accompanying drawing 1 is the utility model electrical schematic diagram;

Accompanying drawing 2 is the utility model occupation mode schematic diagram, and wherein K is manual backup circuit breaker, and ZJ is the switching device that auxiliary relay or other control street lamp open and close.

Embodiment

Referring to accompanying drawing 1,2, light-operated switch comprises an AC contact-less switch circuit of being made up of four IN4007ZF diode bridge rectifier D1-D4 and MCR100-6M944 controllable silicon (Q1), and two of this diode bridge rectifier D1-D4 exchanges auxiliary relay or other switching device that end A, B connect the light on and off of control street lamp; One by the power circuit that is connected in above-mentioned diode bridge rectifier D1-D4 two dc terminal after 140k Ω dropping resistor R4 and the 100 μ f filter capacitor C1 series connection again, filter capacitor (C1) anode provides the work of this light-operated switch required positive voltage, and negative terminal provides ground reference; One by the light-converting electrical signal circuit that is connected to again after 280k Ω divider resistance R1 and the photo resistance RT series connection between positive voltage and the ground; The light that is made of HD14011BP or CT4011 or CC4011 four a NAND gate integrated circuit chip IC-signal of telecommunication amplifies and control circuit, input 6 pin of this integrated circuit chip connect the tie point of above-mentioned light-converting electrical signal circuit divider resistance R1 and photo resistance RT, introduce the voltage signal of reaction illumination variation, output 11 pin of this integrated circuit chip are connected to the control end of above-mentioned controllable silicon Q1 by 21k Ω current-limiting resistance R3, the break-make of control AC contact-less switch circuit; One by the 200 μ f delay capacitor C2 and the 1500k Ω time delay resistance R2 that are parallel between positive voltage and said integrated circuit sheet 12,13 pin, and just being terminated at said integrated circuit sheet 12,13 pin, negative terminal is connected to the delay circuit that the diode D5 between integrated circuit chip 4 pin is formed.When ambient lighting weakened to certain value, the resistance of photo resistance RT increased to certain value, and 6 pin current potentials of integrated circuit chip raise, and 11 pin output high potential makes controllable silicon Q1 conducting, and light-operated switch is connected auxiliary relay or other switching device, and street lamp is opened; When ambient lighting was increased to certain value, the resistance of photo resistance RT was reduced to certain value, and 6 pin current potentials of integrated circuit chip reduce, and 11 pin output electronegative potential ends controllable silicon Q1, and light-operated switch disconnects auxiliary relay or other switching device, and street lamp is extinguished.Adjust the resistance of light-converting electrical signal circuit divider resistance R1, the intensity of illumination in the time of can setting the action of this light-operated switch.The effect of delay circuit is when ambient lighting is in the switch critical point, suitably postpones switch motion, avoids the street lamp flicker.

Claims (3)

1, a kind of street lamp light-operated switch, it is characterized in that: comprise an AC contact-less switch circuit of being made up of diode bridge rectifier (D1-D4) and controllable silicon (Q1), two of this diode bridge rectifier (D1-D4) exchanges auxiliary relay or other switching device that end (A, B) connects the light on and off of control street lamp; One by the power circuit that is connected in above-mentioned diode bridge rectifier (D1-D4) two dc terminal after dropping resistor (R4) and filter capacitor (C1) series connection again, filter capacitor (C1) anode provides the work of this light-operated switch required positive voltage, and negative terminal provides ground reference; One by the light-converting electrical signal circuit that is connected to again after divider resistance (R1) and photo resistance (RT) series connection between positive voltage and the ground; The light that is made of four NAND gate integrated circuit chips (IC)-signal of telecommunication amplifies and control circuit, input 6 pin of this integrated circuit chip connect the tie point of above-mentioned light-converting electrical signal circuit divider resistance (R1) and photo resistance (RT), introduce the voltage signal of reflection illumination variation, output 11 pin of this integrated circuit chip are connected to the control end of above-mentioned controllable silicon (Q1) by current-limiting resistance (R3), the break-make of control AC contact-less switch circuit; One by the delay capacitor (C2) and the time delay resistance (R2) that are parallel between positive voltage and said integrated circuit sheet input 12,13 pin, and just being terminated at said integrated circuit sheet 12,13 pin, negative terminal is connected to the delay circuit that the isolating diode (D5) between integrated circuit chip output 4 pin is formed.

2, light-operated switch according to claim 1 is characterized in that: the used diode model of described diode bridge rectifier (D1-D4) is IN4007ZF; The model of described controllable silicon (Q1) is MCR100-6M944; Described dropping resistor (R4) is 140k Ω; Described filter capacitor (C1) is 100 μ f; Described divider resistance (R1) is 280k Ω; The model of described integrated circuit chip (IC) is HD14011BP; Described current-limiting resistance (R3) is 21k Ω; Described delay capacitor (C2) is 200 μ f; Described time delay resistance (R2) is 1500k Ω.

3, light-operated switch according to claim 1 is characterized in that: described divider resistance (R1) is adjustable for resistance.