A diagnostic system and method for a natural gas orifice flowmeter

Abstract

The invention discloses a diagnosis system and method of a natural gas orifice flowmeter, which comprises a diagnosis controller and a remote control terminal communicating with the diagnosis controller through a local area network. The diagnosis controller includes a central controller arranged on a printed circuit board, a check standard signal generator, a standard signal measurement module and a communication module. The input end of the verification standard signal generator is electrically connected to the central controller, and the output end is electrically connected to the signal loop in the natural gas orifice flowmeter. The verification standard signal generator is used to provide a standard signal source for the signal loop. The input end of the standard signal measurement module is electrically connected to the flow computer in the natural gas orifice flowmeter, and the output end is electrically connected to the central controller. The standard signal measurement module is used to measure the return signal obtained from the flow computer. The communication module is electrically connected with the central controller, and is used for realizing communication between the central controller and the flow computer, the secondary instrument in the natural gas orifice flowmeter, and the remote control terminal.

Description

technical field [0001] The invention relates to the field of equipment performance diagnosis, in particular to a diagnosis system and method for a natural gas orifice flowmeter. Background technique [0002] In the process of natural gas transportation, in order to understand the transportation status of natural gas, it is necessary to install a metering device on the natural gas transportation pipeline to measure and record the transportation speed, static pressure, flow rate, etc. of natural gas, so as to meet the needs of natural gas use. Therefore, it is very important to provide a natural gas flow metering device. [0003] The prior art provides a natural gas orifice flowmeter as a natural gas flow metering device, which includes a natural gas orifice throttling device, secondary instruments (transmitters with sensing elements and signal transmission functions on site, etc.), signal loops , uninterruptible power supply and flow computer. The static pressure, temperatu...

AI Technical Summary

Problems solved by technology

[0005] When the natural gas orifice flowmeter is running, the operator can only judge whether each component is running, but cannot know whether the operation of each component is normal or whether the measurement results are accurate, so that the operator cannot find abnormal conditions in the natural gas pipeline in time , and it is impossible to judge which component is abnormal, which prolongs the processing cycle of the abnormal situation

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