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引用次数: 0
摘要
文章介绍了热电测试法中多点接触建模的结果。热电动势（thermoEMF）源的类型不同，对通过并联多个热电偶获得的等效源的负载特性的影响也不同，如注释图所示。所介绍的模型是在免费提供的 NI LabVIEW 软件包中实现的。该模型在三种类型的热电偶（铜-康铜、铜-铬和铬-铝）上进行了验证，这些热电偶以不同数量并联。计算得出的等效源负载特性与实验结果相差不超过 6%。本文介绍了通过并联不同数量的两种热电偶而获得的等效热电偶源的负载特性建模结果。结果表明，为了获得可靠的数据，必须提供至少 1 千欧的等效源负载。
SIMULATION OF MULTIPOINT CONTACT UNDER THERMOELECTRIC TESTING
The article presents the results of modeling a multipoint contact in the thermoelectric method of testing. Sources of thermoelectromotive force (thermoEMF) have shown different influences, according to their type, on the load characteristics of the equivalent source obtained by parallel connection of several thermocouples as shown in the explanatory figures. The presented model is implemented in the NI LabVIEW package, which is freely available. The model was verified on three types of thermocouples (copper-constantan, copper-nichrome, and chromel-alumel), which have been connected in parallel in different quantities. The calculated load characteristics of the equivalent sources differ from the experimental ones by no more than 6%. The results of modeling the load characteristics of the equivalent thermoEMF sources obtained by parallel connection of different quantities of two types of thermocouples are presented. It is shown that in order to obtain reliable data, it is necessary to provide an equivalent source load of at least 1 kOhm.
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