What is the Principle of Underground Garage Parking Space Sensor Lights?
2 Answers
By emitting electromagnetic waves through a planar antenna, when a moving object enters the electromagnetic wave environment, the waveform reflects back. When the planar antenna receives the feedback waveform, the subsequent circuit detects the trigger signal and activates. Below are specific introductions about underground garage signs and markings: 1. Entrance and exit signs: These refer to the indicator signs at the entrance and exit of the parking lot, indicating the direction of the parking lot entrance and exit and the parking lot rules, making it convenient for vehicles to observe the entrance and exit positions when entering or exiting. They are usually in the form of arrow signs. 2. Parking space direction signs: These are directional signs for parking spaces inside the parking lot, making it easier for people to find them. 3. Ground markings: These are markings displayed on the ground, generally in the form of lines and colors on the ground.
I've studied the design of underground garage parking space sensor lights, and their principles are quite ingenious. They mainly rely on sensors to detect vehicle parking, such as microwave radar or ultrasonic transmitters sending signals. When a car parks, the reflected waves are captured, triggering the switch to turn on the light. There are also geomagnetic sensors that detect changes in the magnetic field caused by the metal body of the car, prompting the control circuit to activate the light, which automatically turns off after a few seconds when no car is present. This design is energy-efficient and cost-effective, eliminating the need for lights to stay on all night, saving electricity and money, while also reducing bulb aging. It's also good for safety, providing timely lighting to guide drivers and prevent collisions. The installation is usually at the edge of the parking space or on the ceiling, making maintenance simple—just cleaning the sensors. I've seen this widely applied in several garages.
