Online thermal loss measurement method based on infrared thermal image scanning

A measurement method and infrared thermal imaging technology, which can be used in measurement devices, measurement of heat, optical radiation measurement, etc., can solve the problems of large average heat flux density error, complicated operation, long time consumption, etc., to improve measurement accuracy, high measurement accuracy, The effect of reducing the difficulty of operation

Active Publication Date: 2020-05-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method has a large error in measuring the average heat flux of a single point, and the error of taking the average of multiple points is also large, and the operation is complicated and time-consuming
[0003] To sum up, the three methods currently used to measure surface heat loss have the problems of large error, complicated operation and long time-consuming

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  • Online thermal loss measurement method based on infrared thermal image scanning
  • Online thermal loss measurement method based on infrared thermal image scanning
  • Online thermal loss measurement method based on infrared thermal image scanning

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Embodiment Construction

[0032] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

[0033] see Figure 1 to Figure 3 , the present invention is: an online heat loss measurement method based on infrared thermal image scanning, which includes the following steps:

[0034] Step 1: Infrared thermal image acquisition:

[0035] a. Determination of surface emissivity: adjust the equipment parameters according to the surface emissivity of the measured object, and use the infrared thermal imager to take the infrared thermal image; establish the emissivity database of the surface of commonly used engineering materials in the oil field, according to the surface properties of the object to be measured Match the corresponding surface emissivity, input the infrared thermal imager, and measure the temperature distribution on the surface of the object;

[0036] b. Analysis of the temperature matrix of the infrared therm...

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Abstract

The invention provides an online thermal loss measurement method based on infrared thermal image scanning, and belongs to the technical field of thermal loss measurement. According to the technical scheme, the online thermal loss measurement method based on infrared thermal image scanning comprises the following steps: infrared thermal image acquisition and infrared thermal image processing. The beneficial effects of the method are that the method achieves the infinitesimal segmentation of the surface of a photographed object through employing the infrared thermal imaging scanning technology,determines the temperature value of each area infinitesimal, reduces the operation difficulty, and improves the measurement precision. The target area is intercepted by utilizing software, and the real size represented by each area infinitesimal element is converted according to a similarity principle so as to determine the actual area of the to-be-measured object. Finally, the total heat loss ofthe object surface is obtained through infinitesimal accumulation summation. The software operation effectively improves the calculation efficiency and accuracy.

Description

technical field [0001] The invention relates to the technical field of heat loss measurement, in particular to an online heat loss measurement method based on infrared thermal image scanning. Background technique [0002] In order to realize the monitoring and evaluation of oilfield energy consumption, it is necessary to monitor the surface heat loss of high temperature equipment in the oilfield. At present, there are mainly the following methods for measuring surface heat dissipation loss: (1) Multi-point temperature measurement on the heat dissipation surface by an infrared thermometer is averaged to obtain the surface average temperature T pj , and then obtain the surface heat transfer coefficient h of the cooling surface according to the empirical formula t , the ambient temperature measured on site is T e , the surface area of ​​the cooling surface of the equipment is A, according to Q=A·h t ·(T pj -T e ) to obtain the surface heat dissipation Q. This method has h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00G01K17/00
CPCG01J5/00G01J2005/0077G01K17/00
Inventor 郑炜博孙东王强齐光峰范路郎立术宋长山
Owner CHINA PETROLEUM & CHEM CORP
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