Digital fitting temperature compensation system of resistance-type differential pressure transmitter

Abstract

The invention discloses a digital fitting temperature compensation system of a resistance-type differential pressure transmitter, which relates to the field of sensor temperature compensation and correction, and is characterized by comprising a pressure transmitter, a digital pressure gauge, a digital power supply, a high-low temperature test box, a computer, an upper computer system, digital communication equipment and other auxiliary parts, and the digital pressure gauge, the digital power supply, the computer and the upper computer system are all connected with the high-low temperature experiment box. A temperature compensation method of a multivariable differential pressure transmitter for regional curved surface simulation is introduced, a model is subjected to segmented and interval curved surface simulation according to a test value and the function fitting precision of a single variable, and then temperature compensation and application of 0.2% FS and higher-precision products are achieved on the basis of collecting minimum data. High and low temperature tests are carried out for compensation, temperature excursion is small after compensation, and the compensation temperature range is not limited.

Description

technical field [0001] The invention relates to a sensor temperature compensation and correction method, more specifically, to a digital fitting temperature compensation system of a resistance differential pressure transmitter. Background technique [0002] In the transmitter industry, as customers use different occasions, customers have more and more demands on differential pressure transmitters, and the sensors used are also different from ordinary pressure transmitters. Differential pressure transmitters generally use Diffused silicon double cavity double diaphragm. It is often used in complex applications such as highly viscous substances, easily crystalline substances, sedimentary media with solid particles or suspended matter, strong corrosive or highly toxic media, etc. [0003] However, the diffused silicon pressure sensor used generally uses high and low temperature chambers to measure temperature drift, self-temperature compensation of strain gauges, correction of...

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Problems solved by technology

[0003] However, the diffused silicon pressure sensor used generally uses high and low temperature chambers to measure temperature drift, self-temperature compensation of strain gauges, correction of zero output, etc., with slow speed, no compensation standard, and poor consistency.

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