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Equivalent changing method for relative thermotechnical test parameter in environment temperature changing process

A technology of equivalent transformation and testing parameters, applied in the investigation phase/state change and other directions, which can solve the problems of high probability of misjudgment, trouble, and poor accuracy.

Pending Publication Date: 2005-10-19
CHINA JILIANG UNIV
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  • Application Information

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Problems solved by technology

[0005] Obviously, doing so will cause considerable trouble for testing the thermal parameters of products that are continuously produced in large quantities.
Otherwise, thermal parameters with poor accuracy will be measured in a large environment with constant temperature and wind speed as reference data to determine whether the product is qualified, and the probability of misjudgment is quite large

Method used

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  • Equivalent changing method for relative thermotechnical test parameter in environment temperature changing process

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Embodiment Construction

[0014] Although the average temperature of the large-scale constant temperature test room (1) shown in the figure is 32°C, its upper and lower temperature fluctuation range is about 3°C, which is far greater than the 0.5°C stipulated in the standard. If the test room (1) is divided into three different temperature zones, then, in the three non-standard ambient temperatures T * In areas (A), (B) and (C), the "T" in the ambient temperature of each test area, and its allowable error range, will meet the requirements of relevant industry standards (up and down fluctuations within 0.5 ℃), obviously , in the process of testing thermal parameters, the ambient temperature "T" must first be taken into account. Through the division of the area, it can always make it meet the requirements of the standard. As for the air flow velocity "V", in a non-standard environment, It cannot be taken into account. However, after the equivalent transition below, it will be concluded that there is no n...

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Abstract

The equivalent conversion method of thermotechnical parameter for varying temperature environment includes the following steps: taking the critical qualified product with critical value P0 of the thermotechnical parameter under standard test environment temperature T0, measuring the equivalent thermotechnical parameter P* of the critical product under non-standard test environment temperature T*. The method can facilitate the mass measurement of relevant thermotechnical parameter.

Description

Technical field: [0001] The invention relates to a thermal parameter testing technology under non-standard testing ambient temperature conditions. Background technique: [0002] As we all know, when testing the relevant thermal parameters (such as temperature, heating or cooling speed, etc.) of the product, there are strict requirements on the testing environment. And the wind speed V and its allowable fluctuation range, in addition, the ambient humidity and its allowable fluctuation range, and so on. However, the above-mentioned ideal thermal test environment requirements are usually difficult to achieve because: [0003] The ideal test environment is: the temperature difference of each point is zero, and the wind speed of each point is zero. Obviously, this is absolutely impossible. Generally, the constant temperature room used as the test environment, especially the constant temperature room for mass product testing, is adjusted by the cold or hot air blown by the air ...

Claims

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Application Information

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IPC IPC(8): G01N25/12
Inventor 梁嘉麟
Owner CHINA JILIANG UNIV