A Smart Electrostatic Sensor for Online Condition Monitoring of Power Transmission Belts
A Smart Electrostatic Sensor for Online Condition Monitoring of Power Transmission Belts
复制标题
用于传动带在线状态监测的智能静电传感器
DOI：
10.1109/tie.2017.2696507
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发表时间：
2017-09-01
影响因子：
7.7
通讯作者：
Yang, Lu
中科院分区：
文献类型：
--
作者：
Hu, Yonghui;Zhang, Shuai;Yang, Lu
动力传动带的在线状态监测对于保持工业皮带驱动设备平稳可靠地运行至关重要。本文介绍了一种智能静电传感器，它通过检测皮带上的静电荷来监测皮带的运动。本文用矩量法建立了一个理论模型，用于计算沿轴向和横向运动的带附近条形电极上的感应电荷。传感器单元使用电荷放大器将感应电荷转换成比例电压信号，并分别通过互相关和频谱分析来测量皮带速度和振动。通过光电轴角编码器和激光位移传感器验证了智能静电传感器的性能。对比实验结果表明，在1.7- 15.5m/s范围内，带速测量相对误差在± 2%以内。该静电传感器能够准确地测量横向振动的频率。尽管由于皮带上的电荷水平不确定而无法测量绝对位移，但不同模式和不同皮带速度下的相对振动幅度的测量结果相当准确。
Online condition monitoring of power transmission belts is essential to keep industrial belt-driven equipment functioning smoothly and reliably. This paper presents a smart electrostatic sensor thatmonitors belt motion through detection of static charge on the belt. A theoretical model is established using the method of moments for calculation of induced charge on strip-shaped electrodes placed in the vicinity of a beltmoving both axially and transversely. The sensor unit converts the induced charge into proportional voltage signals using charge amplifiers and measures belt speed and vibration through cross correlation and spectral analysis, respectively. The performance of the smart electrostatic sensor is validated against a photoelectric rotary encoder and a laser displacement sensor. Comparative experimental results show that the belt speed can be measured with a relative error within +/- 2% over the range 1.7-15.5 m/s. The electrostatic sensor is capable of measuring the frequencies of transverse vibration accurately. Although absolute displacement cannot be measured due to the uncertain level of charge on the belt, the measurement results of relative vibration magnitudes for different modes and at different belt speeds are reasonably accurate.