Blockage diagnosis device and blockage diagnosis method for pressure guiding tube

Abstract

Provided are a blockage diagnostic device and a diagnostic method for a pressure guiding tube. Reduces the time from when a clog develops rapidly to when the clog is detected. The differential pressure data (pressure data) from the differential pressure transmitter (pressure detection unit) is received by the receiving unit (6). In the feature quantity calculation part (7), the time series of the received differential pressure data is divided into a plurality of sections, and the feature quantity indicating the fluctuation state of the pressure for each section is obtained. In the rate-of-change calculation unit (8), smoothing is performed for each of the intervals on the feature data of a certain time interval up to the interval, and the change in each interval is obtained from the smoothed feature data. Rate. In the determination unit (9), the clogged state of the pressure guiding tube is determined based on the rate of change calculated by the rate of change calculation unit (8). As the smoothing processing of the rate-of-change calculation unit ( 8 ), triangular moving average processing, least square method, etc. are used.

Description

technical field [0001] The present invention relates to a clogging diagnosis device and a clogging diagnosis method of a pressure guiding tube for guiding the pressure of a measurement object fluctuating in pressure to a pressure detecting unit for diagnosing clogging of the pressure guiding tube. Background technique [0002] Conventionally, in the field of the process industry, pressure transmitters and differential pressure transmitters have been used, for example, to detect process variables and control processes. Pressure transmitters are also called pressure transmitters, and differential pressure transmitters are also called differential pressure transmitters. The pressure transmitter is used to measure absolute pressure and gauge pressure, and the differential pressure transmitter is used to measure the differential pressure between two points, and is used for the determination of process variables such as pressure, flow, liquid level, and specific gravity. Generall...

AI Technical Summary

Problems solved by technology

[0003] In such a device structure, solid objects, etc. may adhere to the inside of the pressure guide tube due to the measurement object, and the pressure guide tube may be blocked.

Once the impulse line is completely blocked, the process variable cannot be measured correctly, so it will have a considerable impact on the complete equipment

However, since the impulse line transfers pressure to the transmitter before it is completely blocked, the effect of the blockage is difficult to show up in the measured value of the process variable

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