Grounded pressure transmitter

Abstract

The invention discloses a grounded pressure transmitter. The grounded pressure transmitter comprises a cylindrical elastic element; the cylindrical elastic element is connected with four-core cables in turn through a fluoro-rubber sealing ring, a metal outer pipe and a Hirschmann connector; the cylindrical elastic element is connected with an insulating ring, a binding plate, a functional plate and a protective plate in turn; the insulating ring, the binding plate, the functional plate and the protective plate are all arranged in the metal outer pipe; the functional plate is provided with radiating fins; the cylindrical elastic element is provided with a structural stress groove and a welding stress groove; the interior of the cylindrical elastic element is connected with a damper; the cylindrical elastic element is also provided with a support ring, the inner edge of the support ring is stuck with the protective plate to form a whole, and the outer edge of the support ring is contacted with the metal outer pipe; and the metal outer pipe is directly connected with a ground wire. The grounded pressure transmitter effectively reduces the influence of electromagnetic interference and rise and fall of working environmental temperature on the test result, is favorable for improving the measurement precision, and has a simple structure and low manufacturing cost.

Description

technical field [0001] The invention relates to a pressure transmitter, in particular to a grounded pressure transmitter. Background technique [0002] Existing pressure transmitters generally have charge accumulation when transmitting signals, thus forming radio waves and magnetic field interference during the transmission process, which affects measurement accuracy. At the same time, with the prolongation of the working time, since the charge accumulated on the functional board cannot be removed, and the charge accumulates more and more, it will generate a certain amount of heat, which will cause the temperature of the working environment to rise, reduce the performance of electrical components, and cause the measurement accuracy to be unguaranteed. . figure 1 It is a schematic diagram of the overall structure of a typical traditional pressure transmitter, which is connected by a cylindrical elastic element 1, a fluororubber (ED) sealing ring 2, an insulating ring 3, an o...

AI Technical Summary

Problems solved by technology

Therefore, in the working state, the generated charge cannot be transferred, and the charge accumulates more and more, resulting in electrical measurement interference, which reduces the accuracy of electrical components and causes errors in the test

[0003]The existing pressure transmitter improvement plan only makes some compensation for the measurement error caused by the increase of working environment temperature, such as using bridge compensation and strain gauge Compensation, but the process is cumbersome and the effect is not good

There is no literature report on the research on compensation measures for electromagnetic interference

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