High-speed high-precision process parameter online calibration tester

Abstract

The invention relates to a measuring instrument for an automation meter and discloses a high-speed high-precision process parameter online calibration tester. The tester comprises a microprocessor which is connected with a PC computer and used for data communication, and a measuring module, an output module, a power distribution management module and a signal conditioning module which are connected with the microcomputer; the measuring module comprises a high-speed high-precision constant-cycle multiple oblique integral A / D convertor; and the output module comprises a high-speed high-precision A / D convertor, wherein a low-temperature drift low-noise voltage reference source is connected between the high-speed high-precision constant-cycle multiple oblique integral A / D convertor and the high-speed high-precision A / D convertor. The tester is mainly used for measuring an industrial autocontrol system (DCS and PLC) and other automation meters and performing automatic high-precision calibration testing on output signals, can be used for research and development of products and quality detection and control of the products on a production line, and is widely applied to the maintenance and calibration of apparatus and instruments in the production process in electric power, petrifaction, metallurgy and the like.

Description

technical field [0001] The invention relates to measuring instruments for automatic instruments such as industrial automatic control systems (DCS and PLC), in particular to a high-speed and high-precision online calibration tester for process parameters. Background technique [0002] In the past ten years, with the rapid development of my country's industrial enterprises, in order to cope with the fierce market competition, improve their own competitive advantages, and avoid the instability of product quality caused by manual operation, enterprises have increasingly relied on various advanced automatic control systems. Systems and instruments to improve product quality and production efficiency. Various industrial automation control systems and on-site detection instruments (such as DCS, PLC, industrial computer, paperless recorder, pressure transmitter, flow meter, valve, etc.) In the early 1990s, a few foreign multinational companies dominated the world, and now there are ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that the low-precision calibration test equipment in the traditional technology will directly affect the overall performance of the control system, and that a small number of high-precision calibration test products use the Σ-Δ analog-to-digital converter technology, which essentially adopts the solution of exchanging speed for resolution. It is difficult to meet the shortcomings of online high-speed high-precision calibration test needs, and provides a high-speed high-precision process parameter online calibration tester

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