气体传感器校准装置设计

Design of Gas Sensor Calibration System

摘要:

为提高气体传感器现场校准的稳定性和准确度，降低环境条件改变对测量值的准确度和稳定性的影响，简化校准程序降低管理成本，设计了一种基于网络的远程校准装置，该装置可以为气体测量仪器执行计量确认时提供可靠的标准量值。首先，校准装置获取传感器现场的温度和湿度，通过TCP/IP网络将传感器测得的气体浓度和温度以及湿度传送至中央控制服务器，由特定的校准算法计算出传感器的温度和湿度修正值。然后，用修正后的测量值对传感器进行计量确认。实验表明，经设计的校准系统校准的气体传感器与传统的校准方式校准的传感器相比测量值的稳定性和准确度更优，其误差由5.3%LEL提高到0.3%LEL标准偏差由传统校准方法校准后的1.1%LEL提高到0.6%LEL。

Abstract:

To improve the stability and accuracy of gas sensor field calibration，Reduce the impact of changing environmental conditions on the accuracy and stability of measurements, simplify calibration procedures and reduce management costs，A network-based remote calibration device was designed that provides a reliable standard value for the measurement of gas measuring instruments. First, the calibration device acquires the temperature and humidity at the sensor site, transmits the sensor's measured gas concentration and temperature and humidity to the central control server over the TCP / IP network, and calculates sensor temperature and humidity corrections using a specific calibration algorithm. Then, use the corrected measurement value to measure the sensor. The experimental results show that the gas sensor calibrated by the designed calibration system is more stable and accurate than the traditional calibrated calibrated sensor, The error increased from 5.3% LEL to 0.3% LEL standard deviation from the 1.1% LEL after the traditional calibration method to improve to 0.6% LEL.