Application of Improved Intelligent PID Algorithm in High Precision Thermostatic Control in Trace Water Analyzer

摘要

In today's industrial production, there is an increasing demand for on-line monitoring of trace water. To break the low limit (a few ppm level, or even ppb) trace water real-time online monitoring technology, experiments and related theories prove that it is possible to reduce the influence of temperature on the electrolysis cell, ensure the high precision of electrolysis current, and finally realize the low limit measurement of trace water. In this paper, based on the basic PID control algorithm, combined with adaptive PID control, digital PID control, fuzzy PID control, neural network PID control theory to improve the original intelligent PID control algorithm to achieve high-precision (0.01) temperature control, and applied to the Chongqing Branch of Grand Analytical Instruments Co., Ltd. trace water analyzer instrument core cell module. After actual testing, the high-precision thermostatic control used in this paper helps to achieve a breakthrough in real-time on-line monitoring technology for low-limit trace water.