Thiết kế chế tạo thiết bị đếm trục sử dụng phương pháp cảm ứng điện từ

Bài viết Thiết kế chế tạo thiết bị đếm trục sử dụng phương pháp cảm ứng điện từ đưa ra giải pháp chế tạo thiết bị đếm trục sử dụng cho đường sắt Việt nam. Nguyên lý của cảm biến dựa vào sự thay đổi từ thông qua cuộn thu khi bánh tàu đi qua cảm biến, mạch xử lý tín hiệu căn cứ vào biên độ và pha điện áp từ cuộn thu nhận dạng trạng thái của bánh tàu chiếm dụng vùng không gian đặt cảm biến. | Transport and Communications Science Journal Vol 72 Issue 9 12 2021 1118-1130 Transport and Communications Science Journal DESIGN AND MANUFACTURING OF AXLE COUNTING EQUIPMENT USING ELECTROMAGNETIC INDUCTION METHOD Nguyen Thanh Hai1 Dang Quang Thach2 Co Nhu Van1 Tran Van Khuyen1 1 University of Transport and Communications No. 3 Cau Giay Street Hanoi Vietnam 2 National Center for Technological Progress 25 Le Thanh Tong Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 19 06 2021 Revised 16 10 2021 Accepted 14 12 2021 Published online 15 12 2021 https Corresponding author Email nguyenthanhhai@ Tel 84 913233209 Abstract. The axle counting equipment is one of the important devices in the railway signal control system which helps the system to operate safely and accurately. Currently the axle counting devices commonly used in the Vietnamese railway signaling system are mainly imported. This article presents a solution for manufacturing axle counting equipment for Vietnamese railways. The operation principle of the axle counting sensor is based on the change of the magnetic flux through the receiving coil when the wheel passes the sensors. The signal processing of the alxe counter based on the amplitude and phase of the voltage received from the receiver coil will recognize the state of the wheel occupying the sensor space. Sensors and processing circuits have been successfully fabricated and tested on several routes in Vietnam railways. The results show that the signal threshold between passing train and no train is clearly distinctive. The count value of axle is transmitted to the control center through a highly reliable CAN communication network. The manufactured devices can be applied to Automatic Warning System at level crossings Automatic Block Signaling Centralized Traffic Control. Keywords Axle Counter Signal Processing Split Phase Centralized Traffic Control. 2021 University of Transport and Communications 1118 .