标定偏心下压电力传感器测试精度研究

发布时间：2018-06-07 22:20

本文选题：静态标定 + 压电力传感器　；参考：《压电与声光》2017年06期

【摘要】：面向大型薄壁构件自寻位加工检测一体化测控原理,研发了一种小型化多维压电力传感器并进行标定研究。分析静态标定时,偏载对压电传感器多维力测试精度的影响。通过对静态标定加载有偏差时传感器受力的理论推导得到,加载偏差使传感器的转换系数改变,导致向间干扰补偿系数失真,影响了横向干扰输出,降低了测试精度;分析了偏载程度对传感器测试精度的影响,提出了衡量加载点偏差程度的判别方法,发现微小加载偏心带来的附加干扰会超出传感器自身向间干扰指标规定的5%;针对机械连接偏载不可避免事实,找到了克服偏载对转换系数影响的输出比例归一化法,将向间干扰降到5%内。
[Abstract]:In this paper, a miniaturized multidimensional pressure power sensor is developed and calibrated for the integrated measurement and control principle of large thin-walled components. The influence of bias load on the precision of multidimensional force measurement of piezoelectric sensor is analyzed. Through the theoretical derivation of the sensor force when the static calibration loading has deviation, it is concluded that the load deviation changes the conversion coefficient of the sensor, which leads to the distortion of the compensation coefficient of interdirectional interference, affects the lateral interference output, and reduces the testing accuracy. In this paper, the influence of the degree of bias on the precision of sensor testing is analyzed, and a method to judge the deviation of loading point is proposed. It is found that the additional interference caused by the micro-load eccentricity will exceed the 5 points stipulated by the sensor's own inter-directional interference index, aiming at the inevitable fact of the mechanical connection bias load, the output proportional normalization method is found to overcome the influence of the bias load on the conversion coefficient. Reduce the interferences to less than 5%.
【作者单位】：大连理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(51475078,51675084) 国家重点基础研究发展计划资助项目(2014CB046604)
【分类号】：TP212

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