Temperature monitoring system for long-distance industrial gas chromatograph column box

Abstract

The invention relates to a temperature monitoring system for a long-distance industrial gas chromatograph column box. The temperature monitoring system comprises a managing unit, a wireless transmission unit and a control unit and is characterized in that the wireless transmission unit is used for connecting the managing unit with the control unit, wherein the control unit comprises a monitoring server, an analog-digital converter, a digital-analog converter, a low-pass filter and a column box temperature process device; a heating element of the column box temperature process device is connected with the digital-analog converter; a temperature sensor of the column box temperature process device is connected with the low-pass filter; the monitoring server is used for receiving a data of the analog-digital converter and controlling the column box temperature process device according to a PID controller on the basis of SMITH estimation; the analog-digital converter and the digital-analog converter are used for realizing the mutual conversion of digital quantity and analog quantity; the low-pass filter is used for filtering an interference signal on site. The temperature monitoring system provided by the invention can be used for optimizing the dynamic and static characteristics of a control system.

Description

Technical field [0001] The invention relates to the technical field of chromatographs, in particular to a remote industrial gas chromatograph column box temperature monitoring system. Background technique [0002] The detection link in the industrial production process is indispensable. In the production process of petroleum and chemical industry, gas chromatograph is mainly used for component detection and analysis. Current component detection and analysis systems based on gas chromatographs mostly use wired methods for data transmission. Wired network systems have shortcomings such as poor mobility, inflexibility, poor scalability, and inconvenient networking and maintenance. With the development of wireless network technology, the stability and real-time performance of the wireless network have been greatly improved, and its performance is sufficient to ensure the safe and stable operation of the control system. [0003] The essence of the working principle of the gas chromato...

AI Technical Summary

Problems solved by technology

The current chromatographic column oven temperature control mostly adopts the conventional PID control algorithm, the control effect is not ideal, the overshoot is large, the oscillation time of the adjustment process is long, the anti-interference performance is not ideal, and the system performance is unstable.

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