空气负离子测量仪校准方法研究

为解决空气负离子测量仪器校准问题,在简要分析空气负离子测量仪工作原理的基础上,提出了仪器量值溯源途径和校准设备的研制方法,并对研制的负离子发生装置和标准负离子测量仪进行了试验验证。验证结果表明,负离子发生装置产生的负离子场具有负离子浓度连续可调、稳定性好、响应速度快、离子粒径小的特点。标准负离子测量仪相对误差不超过±5%,标准装置测量不确定度为6%,可用于空气负离子测量仪的校准和测试。利用负离子发生装置和标准离子测量仪组成的校准装置,对两种不同的负离子测量仪进行了校准试验,对测得的测量误差进行了分析,验证了校准方法的科学合理性和可行性。

Research on calibration method of air negative ion measurement

In order to solve the calibration problem of air negative ion measuring instruments, based on the working principle of airnegative ion monitor, a method for tracing the source values of instruments and a method of developing the calibration equipment areproposed. The developed negative ion generator and standard negative anion measuring instrument are tested and verified. Theverification results show that the anion field produced by the anion generator has the characteristics of continuously adjustable anionconcentration, good stability, fast response speed and small particle size, the relative error of the standard negative ion measuringinstrument is not more than ± 5%, and the measurement uncertainty of the standard device is 6%, which can be used for the calibrationand test of the negative ion measuring instrument. Using a calibration device composed of the negative ion generating device and thestandard ion measuring instrument, a calibration test is performed on two different negative ion measuring instruments, and themeasurement errors are analyzed to verify the scientific rationality and feasibility of the calibration method.