CN2583924Y - Luminous time controller for road lamp - Google Patents

Abstract

The utility model discloses a light time controller for a street lamp, which is formed by the ordinal connection of a time switch K, an AC and DC converting circuit, a photoelectric detection circuit, and a relay KM, wherein, a normally open contact KM1 of the relay is connected to a coil of a street lamp contactor CJ, and a normally closed contact KM2 and a photoresistor RL of the photoelectric detection circuit in series. The purposes that a street lamp can be automatically turned on according to the brightness, and the street lamp can be automatically turned off at the time of no need of lighting at night. The utility model which has the advantages that the design of a circuit simple and artful, the cost is low, and the operation is stable is suitable for the control of street lamps in medium and small-sized cities.

Description

controller for street lights

technical field

The utility model relates to a street lamp control device, in particular to a street lamp controller capable of realizing the joint action of brightness and time.

Background technique

At present, the controllers used in the street lamp power supply system include light controllers and time controllers. The light controllers control the circuit according to the brightness. Generally, they are turned on in the evening and turned off in the morning. The disadvantage is that the power cannot be turned off at night, which wastes electric energy. The time controller needs to constantly adjust the control time as the season changes, and the degree of automation is low. There are also street light controllers that work together with light and time, but they are all complicated in structure and high in cost.

Contents of the invention

The purpose of this utility model is to overcome the above disadvantages and provide a street light controller, which can be turned on in the evening and turned off at night.

The utility model is realized in the following way: a street lighting time controller is formed by sequentially connecting a time switch K, an AC/DC conversion circuit, a photoelectric detection circuit, and a relay KM, and the normally open contact KM1 of the relay is connected to the street lamp contact On the coil of the device CJ, the normally closed contact KM2 is connected in series with the photoresistor RL of the photoelectric detection circuit.

The time switch K is connected to the input end of the AC-DC conversion circuit, and the switch can be turned off and on at regular intervals.

The AC-DC conversion circuit has an AC voltage of 220 volts and an output DC voltage of 12 volts, and the output end is connected with a power indicator LED DV1.

The photoelectric detection circuit is composed of a photosensitive resistor RL, a "555" type integrated circuit and a resistor. After the photosensitive resistor RL, the normally closed contact KM2 and R2 are connected in series, one path is grounded through the resistor R3 and the adjustable resistor RP, and the other path is grounded through the R4 Connect pins 6 and 2 of the "555" integrated circuit, pins 4 and 8 of the "555" integrated circuit are connected to the positive pole of the DC power supply, pin 1 is grounded, pin 5 is grounded through capacitor C2, and pin 3 is connected to the relay KM.

The photoelectric detection circuit "555" integrated circuit 3-pin output terminal is connected in parallel with the relay KM, and there are working indication light-emitting diodes DV2 and integrated circuit protection diodes DV3.

The photoresistor is installed in a hemispherical transparent cover, such as a lampshade of an automobile headlight. The device can increase the amount of light received by the photoresistor, thereby further improving sensitivity and anti-fog performance.

The utility model has the advantages that the street lamp can be automatically turned on in the evening according to the brightness, and the street lamp can be automatically turned off at night when no lighting is needed. The circuit design is simple and ingenious, and the cost is low. After the street lighting is started in the evening, the normally closed contacts connected in series with the photoresistor are opened, and the photoresistor no longer controls the circuit during the lighting period, so there will be no frequent opening and closing of the critical point and malfunction caused by night lightning and instantaneous light source. Stable and reliable.

Description of drawings

Fig. 1 is a schematic diagram of circuit logic of the utility model

Fig. 2 is a schematic diagram of the utility model circuit

Detailed ways

As shown in Figure 1 and Figure 2, the lighting controller of this road is connected in turn by the time switch K, AC-DC conversion circuit, photoelectric detection circuit, and relay KM. The normally open contact KM1 of the relay is connected to the street lamp contactor CJ. On the coil, the normally closed contact KM2 is connected in series with the photoresistor RL of the photoelectric detection circuit. The time switch K is connected to the input end of the AC-DC conversion circuit, and the switch can be disconnected and closed at regular intervals. Generally, it is set to turn on the power before dark in the afternoon, so that the photoelectric detection circuit enters the detection state. Turning off the power when no lighting is needed at night can save energy. electrical energy. The AC-DC conversion circuit has an AC voltage of 220 volts and an output DC voltage of 12 volts, and the output terminal is connected with a power supply indicating light-emitting diode DV1. The photoelectric detection circuit is composed of photosensitive resistor RL, "555" type integrated circuit and resistor. After the photosensitive resistor RL, normally closed contact KM2 and R2 are connected in series, one path is grounded through resistor R3 and adjustable resistor RP, and the other path is connected to "555" through R4. "Type integrated circuit 6 and 2 pins, "555" type integrated circuit 4 and 8 pins are connected to the positive pole of the DC power supply, 1 pin is grounded, 5 pins are grounded through the capacitor C2, and 3 pins are connected to the relay KM. In addition, in parallel connection with the relay KM, there are working indication light-emitting diodes DV2 and integrated circuit protection diodes DV3. In addition, the photoresistor is installed in the hemispherical transparent cover, and this device can increase the amount of light received by the photoresistor, thereby further improving the sensitivity and anti-fog performance.

The working process of the controller when the street light is on is as follows:

When night falls, the resistance of the photoresistor increases, pins 2 and 6 of the "555" type integrated circuit are at low potential, pin 3 outputs high potential, the relay KM pulls in, the normally open contact KM1 closes, and the street light contactor is connected The CJ coil, the street light contactor pulls in and the street light is on, and at the same time the work indicator light-emitting diode DV2 is on, indicating that the street light is in the on state, and the normally closed contact KM2 is opened to prevent the frequent opening and closing of the critical point of light, or lightning at night And the influence of instantaneous light will cause malfunction.

At night, according to the time set by the user, the time switch K automatically disconnects the 220 volt power supply of the AC-DC conversion circuit, the photoelectric detection circuit loses power, the relay KM is released, the normally open contact KM1 is opened, and the contactor CJ pull-in coil loses its magnetism. The contactor CJ is released, the street lamp is off, and at the same time the power indicator light-emitting diode DV1 is off, and the normally closed contact KM2 is closed, preparing for the next photoelectric detection.

On the second day, according to the time set by the user, usually before dark in the afternoon, the time switch K is automatically closed, the power indicator light-emitting diode DV1 is on, the AC-DC conversion circuit and the photoelectric detection circuit work, and enter the brightness detection stage.

Claims (6)

1. A time controller for street lights, characterized in that: it is formed by sequentially connecting a time switch K, an AC/DC conversion circuit, a photoelectric detection circuit, and a relay KM, and the normally open contact KM1 of the relay is connected to the street lamp contactor CJ On the coil, the normally closed contact KM2 is connected in series with the photoresistor RL of the photoelectric detection circuit. 2. The time controller for street lights according to claim 1, characterized in that: the time switch K is connected to the input end of the AC-DC conversion circuit, and the switch can be turned off and on at regular intervals. 3. The street lighting time controller according to claim 1, characterized in that: the AC voltage of the AC-DC conversion circuit is 220 volts, the output DC voltage is 12 volts, and the output end is connected with a power indicator LED DV1. 4. The street lighting time controller according to claim 1 or 3, characterized in that: the electrical detection circuit is composed of a photosensitive resistor RL, a "555" type integrated circuit and a resistor, and the photosensitive resistor RL, normally closed contacts KM2 and R2 After being connected in series, one path is grounded through resistor R3 and adjustable resistor RP, the other path is connected to pins 6 and 2 of "555" integrated circuit through R4, pins 4 and 8 of "555" integrated circuit are connected to the positive pole of DC power supply, pin 1 is grounded, and pin 5 The pin is grounded through the capacitor C2, and the pin 3 is connected to the relay KM. 5. The street lighting time controller according to claim 4, characterized in that: the photoelectric detection circuit "555" integrated circuit 3-pin output terminal and the relay KM are connected in parallel with a working indication light-emitting diode DV2 and an integrated circuit protection diode DV3. 6. The street light timing controller according to claim 1, wherein the photoresistor is installed in a hemispherical transparent cover.

Images