Development of MEMS Pressure Sensor-based Pressure Calibrator

Abstract

Pressure calibrators are imported at huge costs but if manufactured locally, the costs could be reduced to an affordable margin. With this motivation, a MEMS pressure sensor-based Pressure Calibration simulator was designed and manufactured. A Baro-altimeter measures the height of an aircraft by calculation of air pressure at that location. The pressure inside the Baro-altimeter is decreased artificially to a point where the aircraft is up in the air and the pressure sensors of the aircraft are calibrated and checked for faults. The mechanism creates a vacuum inside the tubes and the pressure is read by a highly accurate MEMS pressure sensor that is used as a reference and a device under test that is a low-quality pressure sensor. The data is fed into a microcontroller STM32 through ADS1248 and after comparing readings from both sensors, the results are displayed.