提高电阻应变式轧制力测力仪测量精度的方法  

Methods for Improving Measuring Accuracy of Resistance Strain Type Rolling Force Dynamometer

作　　者：刘晓蒙 Liu Xiao-meng(Shanghai Institute of Process Automation&Instrumentation,Shanghai 200233,China)

机构地区：[1]上海工业自动化仪表研究院有限公司,上海200233

出　　处：《包钢科技》2023年第2期78-82,共5页Science & Technology of Baotou Steel

摘　　要：针对电阻应变式轧制力测力仪,分别从传感器和二次仪表两方面分析了提高测量精度的方法。传感器的制造精度、现场安装条件是影响精度的主要因素。激励电源倍压法和六线制电桥线路,有助于减少激励电源带来的误差。传感器的比例校准法,可以解决因校准误差引起测量误差的问题,在轧钢现场应用非常方便,考虑到轧钢现场传感器与二次仪表之间电缆线的问题,经数学推导,得出了校准比值的修正公式。The methods for improving the measuring accuracy of resistance strain type rolling force dynamometer are analyzed from such two aspects as sensor and secondary instrument respectively.The manufacturing accuracy and on-site installation conditions of sensor are the main factors affecting accuracy.The voltage-multiplying of excitation power supply and six-wire bridge circuit are helpful to reduce the errors caused by excitation power supply.The ratio calibration of sensor could solve the problem of measurement errors caused by calibration errors,which is very convenient to apply in the steel rolling field.The modified formulas of calibration ratios are obtained through mathematical derivation considering the problem of cable between the sensor and secondary instrument in the steel rolling field.

关 键 词：轧制力 测力传感器 测力仪 电阻应变片 传感器自校准 

分 类 号：TH823[机械工程—仪器科学与技术]