Design and Implementation of High Precision Active Wheel Sensor

Abstract:

Wheel sensor is the basic facility of railway axle counter. The traditional active magnetic steel axle counter method has a disadvantage of low accuracy. For this reason, a high-precision active wheel sensor which sends axle pulse in a fixed position of wheel signal was presented. In addition, double DSP parallel working mode was used to improve the reliability of the system. Firstly, the detection scheme of the system was presented. Then hardware circuit of the wheel sensor was designed with TMS320F2812, and the reliable output of the pulse was realized by using the gate circuit. Finally, software programming was completed based on the hardware design, which mainly includes the wheel signal detection and position calculation for sending axle pulse. The actual operation shows that the system has the advantages of being stable and reliable and has strong resistance to interference, which makes it a high practical value.

• Periodical: Applied Mechanics and Materials (Volumes 373-375)
• Pages: 297-301
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.373-375.297
• Online since: August 2013
• Authors: Ping He, Sheng Mei Cao, Xing Yu Ma, Qi Li
• Keywords: Active Magnetic Steel, Axle Pulse, Gate Circuit, TMS320F2812

References

[1] LY Zhou: Comparison and Analysis between Axle Counter and JTC Track Circuit Using for the Detection of Track Section, volume 37 of Tianjin Science&Technology, (2010), pp.42-44.

[2] YZ Liu: Comparative Analysis of Track Circuit, volume 35 of Shanxi Architecture, (2009), pp.259-260.

[3] M. Berer: Part Ⅱ: System Description of Axle Counting System ACS2000, (2006), pp.14-15.

[4] T Liu and ZY Ding: Guardrail Transformation about Railway Axle Counter, chapter 12 of M&PE, (2009), pp.15-16.

[5] QB Ji: Design of Monostable Pulse Width Circuit with CPLD, Applied Science and Technology, (2001), pp.21-22.

[6] SM Wan: The Principle and Examples of Application about TMS320F281xDSP (Beihang University Press, Beijing 2007).

[7] LM Sun: Principle of TMS320F2812 and Its Program Development Using C Language (Tsinghua University Press, Beijing 2006).

[8] XH Chen and XH Li: Research on Dynamic Error Decomposition Based on Several Signal-processing Methods, volume 27 of Chinese Journal of Scientific Instrument, (2006), pp.1259-1261.