How to Choose Sensor for Integrated Solar Street Light?

Integrated solar street light is a environmentally friendly lighting product. It uses solar light as energy source to power the street light. Traditional street light will stay on all night and pollute the night sky and interfere the vision of night drivers. Light polution is considered as one of the serious environment problems. With the development of solar street light technology, solar street light manufacturers invent new ways to lower the power needs of the light system and save the problem of light polution. Time control and motions sensors are significant methods that help lower the power needs. Radar sensor and PIR sensors are motion sensors that used to help street light save electricity. Let's get to know them and find what is the most suitable for you.

1. Time control

The CPU is used to control the power in time periods. Generally, there are dual time periods, three time periods, and multiple time periods. Take the 3-period control mode as an example. After the light control is started, it will work at 100% power in the first hour, at 75% power in the second hour, and at 50% power in the third hour, and then completely shut down. The characteristic of this control mode is to reduce some invalid lighting and prolong the lifespan of the lamp battery. But this is non-intelligent. If someone passes by in the 3rd hour, the brightness of the lighting is only 50%. If it passes by in the 4th hour, there is no brightness at all.。

2. Radar motion sensor

Radar sensing uses the Doppler working principle, which triggers street lights by sensing moving objects. Sensitivity is increased, and a slight moving object will also trigger the induction effect. When people pass by, the integrated solar street light turns on the full-light mode, and the power is 50W. After a person leaves for 30 seconds, the power of the street lamp drops to 1/5 of the original power, that is, 10W. The sensing distance can reach 8-10 meters. Greatly save the power of integrated solar street lights. Radar sensing is a new sensing technology in recent years, which is smarter than human infrared sensing and voice-controlled sensing, with higher sensitivity, longer sensing distance, and better sensing effect. Angle light, no dead zone, can penetrate wood and thin glass. Of course, the integrated solar street light wth radar motion sensor is more expensive than that of PIR sensor and time control.

3. PIR sensor

Infrared induction uses the principle of pyroelectric exploration, which triggers street lights by sensing the temperature changes in the environment. Once the human body or other objects emitting infrared energy enter the range, it will react. The sensing distance is only 3-5m. When someone passes by, the infrared sensor is triggered, and the light automatically turns on the strong light mode, and the strong light generally lasts for 30 seconds. When a person leaves the sensing range, the light automatically switches to the dim mode, and waits for the next time someone approaches and then adjusts the bright mode.

We have talked three ways that can help integrated solar street light lower the electricity. What are the advantages of integrated solar street lights with motion sensors?

Energy saving and environmental protection

The advantages of induction integrated solar street lights are mainly energy saving and environmental protection. When the human body enters the induction area, the switch will automatically turn on the load. If the human body does not leave and remains active, the induction light will continue to conduct; after the person leaves, the street lamp will automatically lower the power or turn off. It is a good way to achieve "light on when people come, and light off when people leave", avoiding energy waste.

Automatic metering

The switch of the sensor street light has an automatic metering design, and the sensor will be disconnected when the light is strong during the day.

Reliable sensing

The thyristor circuit is adopted, with high safety, wide sensing range as well as high sensing performance.