Next Article in Journal
3D Sugar Printing of Networks Mimicking the Vasculature
Next Article in Special Issue
A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy
Previous Article in Journal
Design Optimization of a Compact Double-Ended-Tuning-Fork-Based Resonant Accelerometer for Smart Spindle Applications
Previous Article in Special Issue
Adaptive Nonlinearity Compensation System for Integrated Temperature and Moisture Sensor
Open AccessArticle

Dynamic Error Correction of Filament Thermocouples with Different Structures of Junction based on Inverse Filtering Method

by Chenyang Zhao 1 and Zhijie Zhang 1,2,*
1
School of Instrument and Electronics, North University of China, Taiyuan 030051, China
2
Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(1), 44; https://doi.org/10.3390/mi11010044
Received: 5 November 2019 / Revised: 23 December 2019 / Accepted: 25 December 2019 / Published: 30 December 2019
Since filament thermocouple is limited by its junction structure and dynamic characteristics, the actual heat conduction process cannot be reproduced during the transient thermal shock. In order to solve this problem, we established a thermocouple dynamic calibration system with laser pulse as excitation source to transform the problem of the restoring excitation source acting on the surface temperature of thermocouple junction into the problem of solving the one-dimensional (1D) inverse heat conduction process, proposed a two-layer domain filtering kernel regularization method for double conductors of thermocouple, analyzed the factors causing unstable two-layer domain solution, and solved the regular solution of two-layer domain by the filtering kernel regularization strategy. By laser narrow pulse calibration experiment, we obtained experimental samples of filament thermocouples with two kinds of junction structures, butt-welded and ball-welded; established error estimation criterion; and obtained the optimal filtering kernel parameters by the proposed regularization strategy, respectively. The regular solutions solved for different thermocouples were very close to the exact solution under the optimal strategy, indicating that the proposed regularization method can effectively approach the actual surface temperature of the thermocouple junction. View Full-Text
Keywords: filament thermocouple; 1D inverse heat conduction; regularization; filtering kernel; two-layer domain filament thermocouple; 1D inverse heat conduction; regularization; filtering kernel; two-layer domain
Show Figures

Figure 1

MDPI and ACS Style

Zhao, C.; Zhang, Z. Dynamic Error Correction of Filament Thermocouples with Different Structures of Junction based on Inverse Filtering Method. Micromachines 2020, 11, 44.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop