摘要
在各种测量系统中，根据测量的预估值，选择不同的量程，测量的误差是不同的。设计了一种量程可调的气压测试系统，系统量程可根据测量预估值简单地进行调节，使得误差减到最小，测量精度得到提高。系统量程调节调理电路，采用了差分输入、同相放大、加法电路，其输出为0—5V或4～20mA标准信号，通过对信号调理电路中电位器阻值的调整，使得电压信号输出的输入范围为0～83．3mV，电流信号输出的输入范围为0—117．1mV。系统量程可以在此输入范围内任意改变大小，实验验证，根据测试的预估值，改变量程上限值，提高了气压测试系统的测量精度。
In a various of measuring system, according to the survey estimates to choose the different range, the measurement error is different. A range adjustable pressure test system is designed, which range can be adjus- ted simply based on the estimated value of the measurement, such that the error is minimized and the measure- ment accuracy is improved. Range adjustment conditioning circuit of system, with the differential input, in- phase amplifier, adder circuit, can output standard signal from 0 to 5 V or 4 to 20 mA, through adjusting poten- tiometer value of the signal conditioning circuit, making the input range of the output voltage signal is from 0 to 83.3 mV, the input range of the output current signal is from 0 to 117.1 mV. System range can be resized with- in this input range. Verified by experiment, according to the estimated value of the test to change the upper lim- it value of the range, the measurement accuracy of pressure test system is improved.
出处
《测控技术》
CSCD
北大核心
2014年第4期4-7,共4页
Measurement & Control Technology
基金
山西省科技攻关项目(20100322005)
关键词
气压测试系统
量程可调
测量精度
pressure test system
adjustable range
measurement accuracy
作者简介
黄刚（1975-），男，硕士，副教授，主要研究方向为测试与控制。
