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Thermocouple welding detection device

A welding detection and thermocouple technology, applied in the direction of measuring devices, using electrical devices, measuring electricity, etc., can solve the problems of low test efficiency, inability to meet the test, and manual testing of thermocouples.

Inactive Publication Date: 2013-12-18
HONG FU JIN PRECISION IND WUHAN CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional detection method requires the tester to manually test the resistance value of the thermocouple. When a large number of thermocouples are used in the test process, the test efficiency is not high and cannot meet the test requirements.

Method used

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Embodiment Construction

[0012] see figure 1 A preferred embodiment of the thermocouple welding detection device of the present invention is used to detect whether the thermocouple wire of a thermocouple 600 is welded normally. The thermocouple welding detection device includes a signal selection circuit 100, a first comparison circuit 200, A second comparison circuit 300 , a switch circuit 400 and an alarm indication circuit 500 . The signal selection circuit 100 is electrically connected to the thermocouple 600, the signal selection circuit 100 receives a selection signal, and outputs a first DC voltage to the first comparison circuit 200 or outputs a second DC voltage according to the selection signal. voltage to the second comparison circuit 300. The first comparison circuit 200 compares the first DC voltage with a first reference voltage and outputs a first control signal. The second comparison circuit 300 compares the second DC voltage with a second reference voltage and outputs a second contr...

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Abstract

The invention provides a thermocouple welding detection device which comprises a signal selection circuit, a first comparison circuit, a second comparison circuit, a switching circuit and an alarm indication circuit. The signal selection circuit is electrically connected with a thermocouple. The signal selection circuit receives a selection signal and outputs a first direct current voltage to the first comparison circuit or outputs a second direct current voltage to the second comparison circuit according to the selection signal. The first comparison circuit compares the first direct current voltage with a first reference voltage and then outputs a first control signal. The second comparison circuit compares the second direct current voltage with a second reference voltage and then outputs a second control signal. The switching circuit receives the first control signal and the second control signal and outputs an alarm indication signal according to the first control signal and the second control signal. The alarm indication circuit receives the alarm indication signal and indicates the welding conditions of thermocouple wires of the thermocouple according to the alarm indication signal.

Description

technical field [0001] The invention relates to a detection device, in particular to a thermocouple welding detection device which can quickly detect whether a thermocouple wire of a thermocouple is welded well. Background technique [0002] Thermocouples are usually used in the process of thermal testing of electronic products, and thermocouples are usually welded by two thermocouple wires of different materials. One end of the two thermocouple wires welded together is used as the temperature sensing end, and the other end that is not connected together is used as the data sending end to connect to the temperature acquisition device. Before the thermocouple is used, it is necessary to check whether the thermocouple wire is well welded to ensure the accuracy of the temperature data collected during the test. [0003] The traditional thermocouple detection method is to detect it by connecting a multimeter in series at both ends of the thermocouple wire. According to the imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01K7/02G01K15/007
Inventor 高志勇伍婷婷刘玉林
Owner HONG FU JIN PRECISION IND WUHAN CO LTD
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