Ultra-low Frequency Vibration Measurement System based on Magnetic Vibration Eensor
Vibration monitoring can be used for health and safety diagnostic of large-scale civil engineering hydraulic structures,such vibration monitoring need to use low-frequency ultra-low frequency vibration sensors.Based on Magnetic vibration sensors,we designed a ultra-low frequency speed sensor based on active feedback control.Through a theoretical analysis on the designed sensor,the system transfer function and equipment parameter expression were obtained.The experimental results proved that through reasonable feedback control,natural vibration frequency drops from 4Hz to 0.05Hz,thus greatly improved the low-frequency response of the sensor.We also compare the performance of the pickup before and after feedback and analyze the basic parameter of the pickup after feedback.we can see that through Reasonable feedback,Low-frequency characteristics of the sensor is expanded.Meanwhile,some problems,hoping to be solved in the future research,For example,Interference problem and The loss of high frequency characteristics problem,etc.
Servo feedback Sensors Ultra low frequency (ULF) Vibration sensors
CHENG Li-na BAI Wen-qiang
Institute of Disaster Prevention,Sanhe Hebei,P.R.China,065201
国际会议
北京
英文
92-96
2012-10-17（万方平台首次上网日期，不代表论文的发表时间）