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Design of a Rapid and Accurate Calibration System for Pressure Sensors with Minimized Temperature Variation
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Design of a Rapid and Accurate Calibration System for Pressure Sensors with Minimized Temperature Variation
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Journal Article
Design of a Rapid and Accurate Calibration System for Pressure Sensors with Minimized Temperature Variation
2025
Overview
Miniaturized pressure sensors fabricated via micro-electro-mechanical systems (MEMSs) technology are ubiquitous in modern applications. However, the massively produced MEMS pressure sensors, prior to being practically used, need to be calibrated one by one to eliminate or minimize nonlinearity and zero drift. This paper presents a systematic design for the testing and calibration process of MEMS-based absolute pressure sensors. Firstly, a numerical analysis is carried out using finite element method (FEM) simulation, which verifies the accuracy of the temperature control of the physical calibration system. The simulation results reveal a slight non-uniformity of temperature distribution, which is then taken into consideration in the calibration algorithm. Secondly, deploying a home-made calibration system, the MEMS pressure sensors are tested automatically and rapidly. The experimental results show that each batch, which consists of nine sensors, can be calibrated in 80 min. The linearity and temperature coefficient (TC) of the pressure sensors are reduced from 46.5% full-scale (FS) and −1.35 × 10−4 V·K−1 to 1.5% FS and −8.8 × 10−7 V·K−1.
Publisher
MDPI AG
Subject
