防护热板法导热仪的温度控制

doi:10.3969/j.issn.1000-1158.2022.11.07

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Abstract The low level of temperature measurement and control of guarded-hot plate devices is an important reason for the deviation of measurement results. Guarded-hot plate devices inherits intrinsic thermal inertia, and multiple units being mandatory temperature controlling. Those units thermally interact via heat conduction and transfer appearing in non-linear interaction, thus, proper setting of controller parameters is critical for suppressing temperature fluctuations. On the temperature control system composed of domestic precision industrial thermometer, thermometer, DC power supply and LabVIEW virtual PID controller, the temperature control parameters of guarded-hot plate devices are studied.The PID control parameters of the system are optimized in segments, and the influence of the temperature control sequence of each component of the guarded-hot plate devices on the overall temperature control effect is studied. According to the setting parameters, in the range from room temperature to 400℃, each unit of the guarded-hot plate device can be controlled within ±0.01℃ in long times. The experimental results show that the parameter setting method can meet the technical requirements of high precision guarded-hot plate devices.

Key words： metrology guarded-hot plate devices;PID control;temperature control tuning parameter

Received: 20 April 2021 Published: 14 November 2022

PACS:

TB941

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	Articles by authors
	WANG Ming-kai
	WANG Jin-ku
	WANG Jing-hui
	ZHANG Jin-tao

Cite this article:

WANG Ming-kai,WANG Jin-ku,WANG Jing-hui, et al. Temperature Controlling for Guarded-hot Plate Devices[J]. Acta Metrologica Sinica, 2022, 43(11): 1431-1437.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.11.07 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I11/1431

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