【摘要】 压力传感器是工业控制常用的传感器,在压力测量中,测量精度往往受到多方面因数的影响。在研究了电阻应变片的基础上得出当测量电路输出电流为4~20m A时,传感器的灵敏度与测量范围成反比。为了改善系统的灵敏度,提出了利用分治法的思想来测量宽量程范围的压力,并利用卡尔曼滤波对数据进行处理,实现压力的精确测量和数据的优化处理。通过现场测试,文章提出的测量设计方案和数据优化方法提高了系统的测量精度,并达到了应用到实际系统的预期效果。更多还原

【Abstract】 Based on the study of resistance strain gauge,this paper concludes that the sensitivity of sensor and the measuring range is inversely proportional when the output current vary from 4 m A to 20 m A.In order to change the sensitivity of measurement system,this paper put forward to measure the wide range pressure using the ideological of divide and conquer and perform the data with Kalman Filter,to realize the accurate measurement and the optimization of data.Through field test,the measurement scheme and optimization method improved the accuracy of the measurement system and achieved the desired effect applied to the actual system.更多还原