Tripod turnstile gate is a high-tech automatic control system, which uses the combination of hydraulic transmission, mechanical structure and electronic technology to control personnel in and out. On the brake machine, various sensors are installed, which collect relevant information and send instructions to the control system after processing to control the brake operation. This control method is more accurate, reliable and safe than the traditional mechanical control method.

The mechanical structure of the tripod turnstile gate is mainly composed of: rotating shaft, limit block, transmission gear, bracket and so on. The rotating shaft is the most important part of the brake machine, which drives the brake rod to rotate through the rotating shaft, so that the brake rod drives the induction coil to generate induction electromotive force to complete the action of opening and closing the brake.
The rotating shaft is composed of a bearing and a spring fixed on the rotating shaft; The limit block is a limit device used to limit the opening and closing of the brake rod. The transmission gear is to connect the transmission gear with the rotating shaft to ensure that the brake rod rotates with the mechanical linkage.

1. Infrared sensor
The principle of infrared sensor is to use infrared light-emitting diodes to receive and convert the infrared light emitted by the object into an electrical signal, because the wavelength of the infrared light emitted by the object is generally between 10 and 100 microns, which makes these light can not be directly received. However, when the object passes through the infrared sensor at a certain speed, because the surface of the object will emit a certain wavelength of infrared light, and the infrared wavelength is much longer than the visible wave length, when the infrared emitted by the surface of the object will be received by the photoelectric device when the detector is converted into an electrical signal. Photoelectric devices are used to receive this signal and convert it into an electrical signal to control the opening and closing of the gate.
Because this sensor can effectively overcome the harm caused by other factors to the human body, it is widely used in many fields.

2. Photoelectric sensor
Photoelectric sensor is a kind of sensor that converts optical signal into electrical signal by using the principle of photoelectric effect. It is composed of two parts: a photosensitive element and an electric sensitive element. The photosensitive element is composed of a photoresistor and a photodiode. When the light source irradiates, the photoresistor deforms and the resistance value of the electric resistor changes. When there is no light source, the photoresistor does not change. The resistance change of a photoresistor is converted into an electrical signal by photoelectric conversion.
The function of photoelectric sensor in tripod turnstile gate is mainly to detect whether the brake rod rotates or pulls out to control the opening and closing of the brake. The detection method is: when the light shines on the photoelectric sensor, its level changes, it sends the change signal to the tripod turnstile gate control system, after analysis and processing, the output switching signal controls the opening and closing of the tripod turnstile gate. This sensor is not affected by ambient light, and has high resolution and high sensitivity, with a general accuracy of 0.1mm.

3. Approach the sensor
The proximity sensor in the tripod turnstile gate is a highly sensitive sensor that is mainly used to detect metallic substances and give an output signal. The proximity sensor mainly plays a limiting role in the tripod turnstile gate. The movement of the tripod turnstile gate is a metal disc with three recessed sections close to the side of the sensor-mounted movement. When the pedestrian passes through the three-roll gate normally, the gate rod moves outward to drive the movement to rotate. At this time, the state of the gate can be judged by detecting the position of the movement, so as to control the switching state of the gate. A person through the three roller gate will drive the movement to rotate a week, the proximity sensor detects the movement will output a locking signal, waiting for the next door signal appears before the gate will work normally. This can effectively prevent the phenomenon of missing detection caused by pedestrian following.

4. Magnetic induction sensor
Magnetic induction sensor is to convert the external magnetic field changes into electrical signals, and output signals after processing by electronic circuits. It can detect the change of the magnetic field, and calculate the rotation Angle of the axis through a certain algorithm, so as to calculate the opening or closing time, when the opening or closing of the gate, can effectively control pedestrian traffic.

With the development of science and technology, the tripod turnstile gate system is also constantly improving. The sensor technology in its control system is also constantly improving to meet the needs of future development.
I hope the above information will help you learn more about sensor technology for tripod turnstile gate applications. If you want to know more about the photoelectric sensor, safety light curtain, LiDAR product applications, you can also email us. With 20 years of experience in the safety photoelectric sensor industry, G-TEK insists on providing customers with the most suitable and reliable photoelectric sensor solutions.