Hardware and software implementation for an auto-calibrated measurement system

In this paper we present the mixed hardware and software implementation of an auto-calibrated measurement system. The use of an analog programmable circuit (FPAA) as a sensor´s conditioning interface, allows a full benefit of its reconfigurable aspect, to carry out self-test and self-adjustment routines, in order to calibrate the measurement chain. The proposed software calibration method permits a successive correction and linearization of the whole measurement system transfer function, using a few number of calibration data. The proposed auto-calibration method can be used for different sensors types, and allows considerable cost reduction of their exploitation and calibration.