Jc. Patra et A. Van Den Bos, Auto-calibration and -compensation of a capacitive pressure sensor using multilayer perceptrons, ISA TRANS, 39(2), 2000, pp. 175-190
Using multilayer perceptrons (MLPs), a smart model for a capacitive pressur
e sensor (CPS) is proposed. When the ambient temperature changes, the nonli
near response characteristics of a CPS may vary widely. Under such conditio
ns, calibration of the sensor and compensation of the nonlinear sensor char
acteristics to obtain correct readout becomes a difficult task. The propose
d MLP model can provide automatic nonlinear compensation and calibration of
the CPS characteristics. A microcontroller unit (MCU)-based implementation
scheme for this model is also considered. Simulation results show that thi
s model can estimate the pressure with a maximum full-scale error of +/-1%
over a variation of temperature from -50 to 150 degrees C. (C) 2000 Elsevie
r Science Ltd. All rights reserved.