Simultaneous Measurement of Belt Speed and Vibration Through Electrostatic Sensing and Data Fusion
Simultaneous Measurement of Belt Speed and Vibration Through Electrostatic Sensing and Data Fusion
复制标题
通过静电传感和数据融合同时测量皮带速度和振动
DOI：
10.1109/tim.2015.2490958
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发表时间：
2016-05-01
影响因子：
5.6
通讯作者：
Wang, Xiaoyu
中科院分区：
文献类型：
--
作者：
Hu, Yonghui;Yan, Yong;Wang, Xiaoyu
准确可靠地测量皮带速度和振动在许多行业中具有重要意义。本文提出了一种可行性研究，使用静电传感器阵列和信号处理算法的同时测量带速和振动的在线，连续的方式。基于这一概念的实验系统的设计，实施和评估。与现有技术相比，本发明具有非接触、同时测量、成本低、结构简单、安装方便等优点。通过有限元建模，研究了静电传感器的特性，使用一个点电荷在电极的敏感区移动。传感器阵列排列成2 × 3矩阵，皮带在两行三个相同的传感元件之间运行。一行中的三个信号互相关用于速度计算，然后将结果融合以给出最终测量。通过对垂直成对传感器信号的归一化谱进行融合，识别出带的振动模式。在两轮皮带传动试验台上进行的试验表明，该系统可在2-10 m/s范围内测量皮带速度，相对误差在±2%以内。对于更高的带速度和更短的电极与带之间的距离，实现了更精确和可重复的速度测量。结果发现，拉伸带振动的谐波带通过频率，因此同意预期的振动特性。
Accurate and reliable measurement of belt speed and vibration is of great importance in a range of industries. This paper presents a feasibility study of using an electrostatic sensor array and signal processing algorithms for the simultaneous measurement of belt speed and vibration in an online, continuous manner. The design, implementation, and assessment of an experimental system based on this concept are presented. In comparison with existing techniques, the electrostatic sensing method has the advantages of non-contact and simultaneous measurement, low cost, simple structure, and easy installation. The characteristics of electrostatic sensors are studied through finite-element modeling using a point charge moving in the sensing zone of the electrode. The sensor array is arranged in a 2 × 3 matrix, with the belt running between two rows of three identical sensing elements. The three signals in a row are cross correlated for speed calculation, and the results are then fused to give a final measurement. The vibration modes of the belt are identified by fusing the normalized spectra of vertically paired sensor signals. Experiments conducted on a two-pulley belt-driven rig show that the system can measure the belt speed with a relative error within ±2% over the range 2-10 m/s. More accurate and repeatable speed measurements are achieved for higher belt speeds and a shorter distance between the electrode and the belt. It is found that a stretched belt vibrates at the harmonics of the belt pass frequency and hence agrees the expected vibration characteristics.