Automated sensor test system using Raspberry Pi

This paper discusses the design of an automated, low-cost and portable system intended to test multiple heterogenous sensors in a system. Systems deals mainly with providing excitation to the pressure and temperature sensors, the signal conditioning of sensor output and displaying the results on an operator-interactive screen. It combines capability to carry out multiple tests on the sensors for determining sensor health; as chosen by the operator. Results of the tests are compared with the expected values and are stored in memory for retrieval. Design is based on Raspberry pi which presents a user-interface to the operator. A set of Arduino-pro mini boards perform the sensor line selection by switching a relay network and carry out source selection for providing sensor excitation.