电源及负载电阻对PTB220型气压传感器检定结果的影响  

Effect of Supply Voltage and Load Resistance on Verification Results of PTB220 Pressure Sensors

作　　者：李建英[1] 贺晓雷[1] 崇伟[1] 丁红英[1] 

机构地区：[1]中国气象局气象探测中心,北京100081

出　　处：《气象科技》2015年第2期181-185,201,共6页Meteorological Science and Technology

基　　金：公益性行业(气象)科研专项"自动站观测资料质量评估及订正技术研究"资助

摘　　要：为保证检定结果的准确可靠,对多台自动气象站用PTB220型气压传感器进行了供电电压及负载电阻的试验.试验结果表明：在12～30 V的范围内,随着供电电压的提高,PTB220型气压传感器模拟量输出测量误差存在着逐渐变大的现象,这种变化最大达到了-0.28 hPa;而数字量输出则不存在这一问题;当负载电阻在10～500 kΩ之间变化时,PTB220型气压传感器的模拟量输出测量误差在测量范围下限附近呈现出随着负载电阻的增加而逐渐增大的现象.基于这一发现,对PTB220型气压传感器检定方法的完善提出了针对性建议.Tests of supply voltages and load resistances on several PTB220 pressure sensors are carried out for the accuracy and reliability of verification results. The test results show that the measurement errors of pressure sensor analog output are increasing gradually with the increasing supply voltage in the range of 12 to 30 V. The maximum error variation is up to --0.28 hPa, while there is no effect for digital outputs. The analog measurement errors of the PTB220 pressure sensors are increasing with the increasing of load resistance at the low limit of pressure measurement range for load resistance variation between 10 k~ and 500 k~. Based on this finding, suggestions for the modification of verification method of PTB220 pressure sensors are proposed accordingly.

关 键 词：气压传感器 供电电压 负载电阻 测量误差 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]