The street light control switch, the light visibility is high and off, and the light visibility is l

The street light control switch is an intelligent device, which can automatically adjust the brightness of the street light according to the level of light visibility. When the light visibility is high, the switch will automatically turn off the street lights to save energy and reduce light pollution. And when the light visibility is low, the switch will automatically turn on the street lights to provide enough light to ensure the safety of pedestrians and vehicles.

Light visibility refers to the degree to which light is hindered from traveling through the atmosphere, and can also be understood as the degree to which the human eye can see distant objects clearly. In the daytime, the sun is abundant, the light visibility is high, and people can clearly see distant objects, at this time, the illumination effect of the street lights is relatively small, so the light control switch will turn off the street lights to avoid unnecessary energy waste.

At night or in overcast weather, light visibility is low, people's vision is restricted, and the safety of walking and driving is affected. At this time, the lighting role of street lamps is particularly important. The light switch automatically lights up the street lights based on low light visibility, providing enough light for pedestrians and vehicles to ensure they can clearly see their surroundings, thereby reducing accidents.

The use of light switches can not only improve the energy efficiency of street lights, but also reduce the impact of light pollution on the ecological environment. When light visibility is high, turning off street lights can reduce unnecessary light pollution and protect the living environment of nocturnal creatures. And when the light visibility is low, the lighting of the street lights can provide enough illumination and avoid the light pollution caused by excessive lighting.

In short, the street light control switch is an intelligent device, which can automatically adjust the brightness of the street lamp according to the level of light visibility. Through the rational use of light resources, the light switch can improve the energy efficiency of street lights, reduce the impact of light pollution on the ecological environment, and ensure that pedestrians and vehicles can walk and drive safely at night. The application of this intelligent technology in urban lighting can not only improve the quality of life, but also contribute to sustainable development.

Refer to this circuit diagram.

Now there are two situations: the first is that there is light and there is no light; The second is that there is light, that is, it is on, and (whether there is light or not), that is, it is turned on and off.

I understand that your question refers to the second type.

It is estimated that there is no such switch assembly, but this action can be completed in parallel by a photosensitive switch and two relays (one responsible for turning on the main loop and one responsible for resetting the photosensitive switch).

That is to say, your light switch will be powered on if there is light, and it will be powered off immediately if there is no light, right?

If you know a little bit about electronics, you can drive a small relay by adding a pull-up resistor to a photo-controlled diode and connecting their contacts to a smith gate (connecting all the gates in parallel to increase the output current). The contacts of the relay are connected to your switch in parallel. Do you understand?

Light sensors? I don't know what you're asking.

Install a time-controlled switch to turn on or off at night, the time is set to open at six o'clock to six off tomorrow morning, and there are multiple sets of controls! The choice is yours.

Lamp networking light control time controller Industrial timer is a multi-functional advanced time controller (time control switch) that integrates the two functions of light control function and ordinary time control with advanced embedded microcomputer control technology, and can be enabled at the same time with the light control probe (function) and time control function according to the user's energy-saving needs, which will achieve the best energy-saving effect. It is the best energy-saving control device for street lights, landscape lights, advertising light boxes, neon lights and other equipment; It can be widely used in streets, railways, stations, waterways, schools and power supply departments and other applications that require time control.

The question is very simple: go to the place that sells electromechanical products and buy a time and light control (BH200H.).Working voltage load 5000W Shenyang Bohai Electric Guess Coarse Factory) dual-purpose switch, power consumption 6800 watts Buy a 20A AC contactor can be controlled by time (not affected by the weather, lack of dust, as long as the time is adjusted), with light control (thunder during the day, Zhao Chan rain are lit).

I'm from the Department of Chemical Engineering, and I haven't studied "Fundamentals of Analog Electronic Technology"! I've drawn a circuit for your reference!

R1 and R2 and the two resistors below them must be above 200K, and R3 is a photoresistor.

The product of R4 and C1 is multiplied by the delay [C1 is f, time is s] and the output is connected to the relay!

R1 is equal to the resistance below it as well as R2!

The adjustable resistance is slightly smaller than the one above!

First of all, you have to understand whether you are doing graduation ** or company product research and development? In this way, we can give you specific suggestions and solutions.

(3) Because the voltage drop of the battery pack will cause the voltage at both ends of the photoresistor to drop, the resistance value of R1 in the series circuit is unchanged, so that the photoresistor R2 should be made

The voltage at both ends reaches 3 volts, and the photoresistor is R2

The resistance must be increased, so it can only be achieved at a lower illumination level.

1) It can be obtained from the formula p=ui, and the current passing through the street lamp when it is working normally is i=<>=; (2) Check the table to find that when the light is 15 lux, the resistance value of the photoresistor is 20, and the voltage at both ends is also known, so the current in the circuit can be found, and the power supply voltage is known, so the resistance r1 can be found

The voltage, voltage and current at both ends are known, and its resistance can also be found; (3) If the voltage of the battery pack decreases, the resistor R2 is divided

The voltage will also decrease, in order to reach the 3V condition to start, it is necessary to increase the resistance value of the resistance R2, from the light and resistance value comparison table, it can be seen that the intensity of the light must be reduced, that is, it will cause the street lamp to be darker than usual to light up.

2) Solution: Check the table to see that when the illuminance is 15 lux, the resistance value of the photoresistor R2 is 20;

then the current i1 in the circuit

i2<>

The voltage at both ends of the resistor R1 is U1

u–" u2

Then the magnitude of the resistance r1 r1

(3) Because the voltage drop of the battery pack will cause the voltage at both ends of the photoresistor to drop, the resistance value of R1 in the series circuit is unchanged, so that the photoresistor R2 should be made

The voltage at both ends reaches 3 volts, and the photoresistor is R2

The resistance must be increased, so it can only be achieved at a lower illumination level.