同位素法露点在线检测仪控制方案

The on-line isotope dew point measurer control scheme

由于a同位素法露点在线检测仪的响应时间和检测精度取决于其控制精度,不同的控制方案有不同的控制结果。为适应不同场合对响应速度和检测精度的要求,分别设计了两种控制方案,即露层厚度控制与温度平衡动态扫描控制。响应时间和检测精度分别为:20s,±0.5℃;300s,±0.1℃。研究表明,露层厚度控制方案收敛速度较快,适用于现场实时检测;温度平衡动态扫描控制方案能够克服放射性统计涨落的影响,可提高检测精度,但检测时间长,因此适用于实验室检测。

Because the control precision of on line isotope dew point measurer decides its detecting precision and re sponse time, different control schemes have different con trol results. Two kinds of control schemes are designed respectively for different requests of detecting precision and response time on different occasions. They are dew layer thickness control and temperature balance dynamic scanning control. Their detecting precisions and response times are 20s, ±0. 5℃ ; 300s, ± 0. 1℃ respectively. The effect of two control schemes in detecting precision and response time is discussed. The results show that the dew layer thickness control is suitable for on Site measuring, the temperature balance dynamic scanning control is suitable for laboratory measuring.