The High-Precision Relative Rotational Speed Measurement System Based on Magnetic Signal and Spectrum Correction

Abstract:

A kind of relative rotational speed measurement system based on magnetic signal and spectrum correction should be proposed for the most of current methods of relative rotational speed measurement cannot meet the measurement requirement of small size, high overload resistance in the military and industrial fields. The system collects the fixed length of time asymmetric periodic intensity signal of magnetic induction based on the characteristics of magnetoresistive sensor’s non-contact measurement, and then analyze the signal spectrum by FFT in order to obtain the accurate main frequency components in the frequency domain after the spectrum correction. The system can determine the direction of the relative rotation by detecting the waveform in the time-domain.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 2713-2717
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.2713
• Online since: July 2011
• Authors: Guo Bin Chen, Xiao Ming Zhang, Xing Cui, Yong Hui Li, Jun Liu
• Keywords: Fast Fourier Transform (FFT), Magnetoresistive Sensor, Relative Rotational Speed, Spectrum Analysis, Spectrum Correction

References

[1] J. DENG and H. LIN: Electric Machines & Control Application. Vol. 37 (2010), p.50.

[2] D. LI and C. ZHAO: Journal of Nanjing University of Science and Technology. Vol. 33(2009), p.320.

[3] H. W. LIAO and X. F. YANG: Recording & Media. Vol. 4(2003), p.40.

[4] D. J. Adelerhof and W. Geven: Sensors and Actuators A: Physical. Vol. 85(2000). p.48.

[5] X. Wang and W. Huang: Servo Control. Vol. 3(2010). p.62.

[6] M. Xie and K. Ding: Journal of Chongqing University(Natural Science Edition). Vol. 2(1995). p.47.