Circuit for measuring cold-end temperature of thermocouple

The invention provides a circuit for measuring the cold-end temperature of a thermocouple. The circuit comprises a temperature measuring circuit, an acquisition circuit and a processor, wherein the acquisition circuit and the processor are sequentially connected with the temperature measuring circui...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JIANG XIEGANG, XU SHAOWEI, WANG GUODONG, LIANG ZHENGZHENG, GOU LIMIN, TAN ZHIHONG, LIU SHUO, JING DESHENG, LIU YONGQIANG
Format:	Patent
Sprache:	eng
Schlagworte:	MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention provides a circuit for measuring the cold-end temperature of a thermocouple. The circuit comprises a temperature measuring circuit, an acquisition circuit and a processor, wherein the acquisition circuit and the processor are sequentially connected with the temperature measuring circuit. The temperature measuring circuit comprises a direct-current power supply and a diode, wherein the cold end of the thermocouple is connected between the direct-current power supply and the diode. The parameters of the direct-current power supply and the diode meet the requirement that current flowing across the diode is 100 +/- 10 mA. The acquisition circuit is an analog-digital conversion chip. The circuit for measuring the cold-end temperature of the thermocouple is low in cost and easy to achieve, is very suitable for an electronic acquisition system and has wide application prospect.