Radar human body induction sensor elevator intelligent induction

Radar human body induction sensor elevator intelligent induction improves operation efficiency. At present, there are more than 10 million elevators in the country, and about 1.584 billion passengers take the elevator every day. According to relevant data, the electricity consumption of elevators ranks second in daily life energy consumption, second only to the electricity consumption of air conditioners. In most high-rise buildings, only one elevator can not meet the needs of people using elevators, so multiple elevators are set up. The parallel control system is mainly used to control two elevators at the same time, and the elevator that starts the elevator and is close to the floor will arrive first.

To save time, passengers often press multiple elevators while riding in an elevator. After the passengers leave the elevator, the rest of the elevators will still stop on the floor, but at this time there are no passengers on the floor, that is, the parking is invalid, resulting in a waste of resources. In order to judge whether there are passengers on the floor, a radar human body induction sensor is installed above the elevator station on each floor, which detects human body signals through electromagnetic waves and converts them into electrical signals for output. When someone enters the sensing range, the module will output a high level, otherwise it will output a low level.

During the operation of the elevator, the elevator system will continuously read the output signal of the radar human body induction sensor. Once the low level is read, that is, the passenger leaves the station, the elevator call button is eliminated through the program, the invalid parking is reduced, and the elevator operation efficiency is improved. Radar is an electronic device that uses electromagnetic waves to detect targets. By emitting electromagnetic waves to illuminate the target and receiving echoes, it can obtain information such as the distance, distance change rate (radial velocity), azimuth, and angle from the target to the electromagnetic wave emission point.

Based on the Doppler effect, the radar human body induction sensor has flexible and adjustable sensing distance, self-calibration function, and is not subject to external interference. It is widely used in intelligent perception, human presence sensing, motion detection and control and other fields. The radar sensor detection part is located at the elevator entrance and exit of each floor, and the coverage area is the waiting area. When the call button is pressed, the radar sensor begins to periodically detect whether there are people in the waiting area. If someone is waiting, the elevator performs the normal stop procedure on the floor, that is, slow down, stop, open the door, wait, and close the door.

When no person is detected waiting in the detection period, the unmanned command will be executed, that is, the call button will pop up, and the elevator will not stay at this floor after the call is over. When the elevator starts the parking procedure at the floor, the presence of the waiting person is not detected. In order to ensure the safe operation of the elevator, the elevator continues to execute the stop procedure, but only executes the deceleration procedure without opening and closing the door, and then continues to execute the acceleration procedure to reach the next stop point.

When the elevator is running down, the unmanned command just pops up the down call button, not the up call button. When the elevator enters the upward running cycle, the upward call button will pop up due to no one command. Radar human body induction sensors help elevators improve operation efficiency, and have the advantages of low cost, high detection accuracy, and diverse functions. The obvious advantage is that it can be embedded in various instruments and devices to realize intelligent control. In order to determine whether there are passengers on the floor, the core of the application of intelligent sensing technology using radar human sensing sensors is to reduce invalid parking and improve the operating efficiency of elevators.