Ultramicro differential pressure high-precision output device and method

Abstract

The invention relates to an ultramicro differential pressure high-precision output device and method. The ultramicro differential pressure high-precision output device comprises an air supply source, a programmable control pressure controller, a programmable drying oven and a computer; the air supply source is communicated with a plurality of branch air supply pipelines through a main air supply pipeline, and each branch air supply pipeline is provided with a hydraulic valve, a pressure controller and an electromagnetic valve; a total pressure output pipeline converged at the tail ends of the branch pipelines is connected with a plurality of compensation transmitters, the compensation transmitters are all located in the programmable drying oven, a computer is connected with the programmable control pressure controller through an IEEE488 bus, the programmable control pressure controller is connected with a pressure controller, and the computer is connected with an electromagnetic valve control panel for controlling the electromagnetic valve through an RS232 bus 1. A PIO control panel and a gas circuit switching module are sequentially connected between the computer and the programmable drying oven and are connected through a PCI bus; the programmable drying oven is connected with an acquisition isolation control panel and is connected with the computer through an HART bus, a chip is arranged in the programmable drying oven and is connected with the computer through an RS232 bus 2, and the transmitter measurement precision can be improved.

Description

technical field [0001] The invention relates to the technical field of pressure transmitters, in particular to an ultra-micro differential pressure high-precision output device and method. Background technique [0002] At present, the minimum range that domestic differential pressure transmitters can measure can only reach more than 100Pa, and the accuracy can only reach 0.3%. Looking at the world, it can produce ultra-micro differential pressure transmitters (range below 100Pa, accuracy 0.1%). Rosemount is the only manufacturer, and similar applications are completely monopolized at home and abroad. In many tenders, there are often supply requirements for ultra-micro differential pressure (range below 100Pa, accuracy 0.1%). For this reason, domestic transmitter manufacturers will lose many opportunities to win bids. The device and method provide a compensation method for the production and manufacture of ultra-micro differential pressure transmitters. After compensation by...

AI Technical Summary

Problems solved by technology

In many tenders, there are often supply requirements for ultra-micro differential pressure (range below 100Pa, accuracy 0.1%). For this reason, domestic transmitter manufacturers will lose many opportunities to win bids

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