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Measurement method for fluid pressure in non-intrusive pipeline

A non-intrusive, measurement method technology, applied in the direction of fluid pressure measurement, fluid pressure measurement, and measurement devices using acoustic methods, can solve the problems of large sound attenuation and low reliability, and achieve a wide measurement range, easy to carry, The effect of high reliability and measurement accuracy

Active Publication Date: 2016-07-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In this method, the ultrasonic waves are reflected and refracted between the pipe and the fluid many times, so the sound attenuation is large and the reliability is low

Method used

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  • Measurement method for fluid pressure in non-intrusive pipeline
  • Measurement method for fluid pressure in non-intrusive pipeline
  • Measurement method for fluid pressure in non-intrusive pipeline

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] The present invention provides a non-interventional method for measuring fluid pressure in a pipeline. The specific implementation of the present invention will be described in detail below:

[0027] A non-invasive method for measuring fluid pressure in a pipeline, the test device used for the measurement includes an ultrasonic transmitting probe 1, an ultrasonic receiving probe 2, an industrial computer 3 and a temperature transmitter; the ultrasonic transmitting probe 1 and the ultrasonic receiving probe 2 are all connected with the industrial computer 3, and the industrial computer 3 includes an ultrasonic transceiver card, a data acquisition card and a main control computer; the steps of the method are as follows:

[0028] Step 1, selecting a material with the same metallographic structure and surface roughness as the tested pipeline 4 as a tens...

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Abstract

The invention discloses a measurement method for fluid pressure in a non-intrusive pipeline, and solves the problem of monitoring of fluid pressure in the internal part of the pipeline without damaging the structure of the pipeline. According to the method, a stress coefficient K and time of corresponding ultrasonic critical refraction longitudinal wave propagation are acquired based on a selected stretching test block and a zero stress test block; a data acquisition card acquires transit time data of an ultrasonic transmit-receive card to be transmitted to a master control computer, and the master control computer obtains time of ultrasonic critical refraction longitudinal wave propagation of a measured pipeline through calculation; service stress of the measurement position of the external surface of the pipeline is also obtained; a hydrostatic stress measurement experiment is performed by utilizing a pipeline test member so that the fluid pressure measurement coefficient in the non-intrusive pipeline and a quantitative relation model between stress of the external surface of the pipeline and fluid pressure in the pipeline are obtained; and finally the measured value of fluid pressure in the pipeline is obtained. The method is simple in the structure of the experiment device and high in measurement accuracy and reliability.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, and in particular relates to a non-intervention method for measuring fluid pressure in a pipeline. Background technique [0002] The pressure measurement inside the hydraulic system, gas or fluid delivery pipeline is the main method and means for monitoring the operation status of the pipeline system and pipeline fault diagnosis. At present, hydraulic pressure measurement mainly adopts intrusive measurement. Commonly used intrusive measurement includes mechanical pressure gauge or strain gauge, piezoresistive, vibrating wire and other pressure measurement methods. The integrity of the pipeline structure means that a pressure measurement interface needs to be reserved, and it has disadvantages such as poor reliability and difficult fault location. Especially under high pressure conditions, it is easy to leave potential safety hazards. Therefore, it is urgent to study a reliable non-invasiv...

Claims

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Application Information

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IPC IPC(8): G01L11/06G01L11/00
CPCG01L11/00G01L11/06
Inventor 徐春广吕卓李焕新潘勤学田海兵宋剑锋王俊峰张翰明徐栗颖
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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