Adaptive Nonlinearity Compensation System for Integrated Temperature and Moisture Sensor

Chen, Guohong; Zhou, Shengjun; Ni, Jie; Huang, Hao

doi:10.3390/mi10120878

Cited by 3 publications

(1 citation statement)

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“…As previously applied to pressure scanners, traditional software compensation algorithms consist mainly of polynomial fitting, surface fitting with the least-squares method, and curve interpolation [14]. However, these conventional algorithms are limited by the demand for pressure measurement accuracy [15][16][17]. In particular, determining a stable solution for the equation when using the least-squares method for temperature compensation will create a pathological problem if the order of the fitted expression is high.…”

Section: Introductionmentioning

confidence: 99%

Research on Temperature Compensation of Multi-Channel Pressure Scanner Based on an Improved Cuckoo Search Optimizing a BP Neural Network

et al. 2022

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A multi-channel pressure scanner is an essential tool for measuring and acquiring various pressure parameters in aerospace applications. It is important to note, however, that the pressure sensor of each of these channels will drift significantly with the increase in the temperature range of the pressure measurement, and the output voltage of each of these channels will show nonlinear characteristics, which will constrain the improvements in the accuracy of the measurement. In the regression fitting process, it is difficult to fit nonlinear data with the traditional least-squares method, which leaves pressure measurement accuracy unsatisfactory. A temperature compensation method based on an improved cuckoo search optimizing a BP neural network for a multi-channel pressure scanner is proposed in this paper to improve pressure measurement accuracy in a wide temperature range. Using the chaotic simplex algorithm, we first improved the cuckoo search algorithm, then optimized the connection weights and thresholds of the BP neural network, and finally constructed an experimental calibration system to investigate the temperature compensation of the multi-channel pressure scanning valves in the −40 °C to 60 °C temperature range. The compensation test results show that the algorithm has a better compensation effect and is more suitable for the temperature compensation of multi-channel pressure scanners than the traditional least-squares method and the standard RBF and BP neural networks. The maximum full-scale error of all 32 channels is 0.02% FS (full-scale error) and below, which realizes its high-accuracy multi-point pressure measurement in a wide temperature range.

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Section: Introductionmentioning

confidence: 99%