Full-height cross turnstile is a common intelligent control equipment, which is mainly used in intelligent buildings, intelligent parking lots, intelligent communities and other occasions. Full-height cross turnstile generally adopts electromagnetic motor to drive the rotation of the shaft, and the rotation of the electromagnetic shaft is detected by a rotary encoder composed of photoelectric sensors to control the rotation of the motor. Photoelectric sensor is a device to measure the light intensity, irradiation angle or distance, which is mainly used to detect the rotation of the shaft in the full-height cross turnstile. At present, the common full-height cross turnstile motion control system on the market mainly adopts photoelectric sensors. Therefore, its selection program is the key to realize the motion control of full-height cross turnstile.This paper analyzes the role of photoelectric sensors in the motion control of full-height cross turnstile, and proposes the selection of sensors with low cost, small size, fast response, and strong anti-interference ability.

The installation structure of the sensor in the cross optical turnstile:

The cross optical gate consists of the main body of the gate, the driving device, the transmission device, the limiting device and the photoelectric sensor. The main body of the gate is composed of an upper grid plate, a middle grid plate and a lower grid plate. The driving device is composed of a motor and a reducer. The transmission device is composed of worm gear and sprocket. The limit device is composed of a limit switch and a limit motor. The photoelectric sensor is mainly used to detect the opening state of the gate.

The main body of the gate is a combination of an upper grid plate and a middle grid plate, and the middle grid plate is located between the upper and lower two upper grid plates, on which a plurality of photoelectric sensors are arranged. When the gate is opened, the gate body moves along the track of the upper and lower grid plates, and the photoelectric sensor is fixed on one of the upper grid plates, and the pulse signal sent by it is input into the single chip microcomputer through the control box. The single chip microcomputer processes, analyzes and judges the received pulse signal to determine whether the gate is opened.

The motion control system of full height cross turnstile is composed of three parts, which are infrared sensor, MCU control and communication module. The infrared sensor is used to detect the working state of the external infrared transmitting tube and transmit the detected signal to the MCU. The microcontroller receives signals from the infrared sensor through communication with the control circuit and controls the motor rotation according to the input signal, thus realizing the motion control of the full-height cross turnstile.

Sensor Application solutions:

As the motion control system of the cross optical turnstile, the photoelectric sensor can ensure the normal operation of the gate and avoid the phenomenon of missing detection. Therefore, the diffuse reflection photoelectric sensor with stable performance and strong anti-interference is needed. Because of the large shape and volume, the cross turngate is mainly used in outdoor places as an access control system. The changeable outdoor working environment is also one of the test conditions of the sensor. It is important to confirm the protection level of the diffuse photoelectric sensor and whether it supports outdoor use.

PM18D diffuse reflective photoelectric sensor product features:
1. Support three different detection distances of 100mm, 400mm and 1000mm.
2. Easy and quick installation. Metal threaded housing is impact resistant, corrosion resistant and has a long product life.
3. Excellent product cost performance.
4. With reverse polarity protection, over-current protection, over-voltage protection, product quality is guaranteed.
5. Protection grade IP67, can still maintain normal operation in bad weather outdoors.

Inductive proximity sensors have stable performance. In the cross optical turnstile is mainly used as a limit device. Used to control the gate rotation angle and specialized locking, to ensure the realization of one person pass at a time, the strict implementation of the gate counting function.

IM18 inductive proximity sensor, limit sensor product features:
1. M8, M12, M18, M30 different sizes, a variety of product models to choose from.
2. Installation is simple and convenient. Supports two different installation methods: direct wire and connector.
3. Reverse polarity protection, short circuit protection. Safety protection to ensure product quality.
4. Protection class IP67, waterproof, dustproof, corrosion-resistant.

We hope the above information can help you pick the right safety sensor protection products for your cross optical gate. If you are still not sure which infrared photoelectric sensor you should choose, you can also contact us by email.G-TEK has the most professional technical service team and sales service team to provide you with the most professional sensor product solutions.