应变式电子测力系统设计

为改善传统机械指针式测力计读数不便、灵敏度低且稳定性差的不足,采用电阻应变片及等强度梁设计了一种电子应变式测力计,选择灵敏度高且具有温度自补偿功能的全桥电路作为测量电路,测量信号经滤波、放大处理后接入ADC0804进行A/D转换,最后通过单片机AT89C52将转化后的测力值显示在LCD1602液晶显示器上。所设计测力计测量范围为0～100 N,输出相关系数为99.8%,分度值可达0.1 N。该基于单片机的测力系统具有结构简单便于携带、操作方便、显示直观及精度高等优点,适用于现代工业生产中微小力的检测。

Design electronic strain force measurement system

This paper is an attempt to eliminate inconvenient readings,low accuracy and poor stability revealed by the traditional mechanical pointer dynamometers.The effort consists of the design of a kind of electronic dynamometer with resistance strain gauge and beam of constant strength,the use of full-bridge circuit with a higher sensitivity and temperature self-compensation function as measurement circuit,the access of the measuring signal into ADC0804 through the filter and amplification circuit,for A/D conversion,and displaying of the converted measurement force in the LCD1602 LCD monitor by AT89C52 single-chip microcomputer.The paper offers the measurement range of designed dynamometer of 0-100 N,and division value of 0.1 N.The force measurement system based on SCM boasts a more simple structure,easier operation,more intuitional display,and higher precision,lending itself more to the detection of small force in modern industrial production.