High precision intelligent piezoresistant pressure transmitters for aggressive and non-aggressive environments

• Grant number: 03/07737-7
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Start date: December 01, 2004
• End date: July 31, 2009
• Field of knowledge: Engineering - Electrical Engineering - Electrical, Magnetic and Electronic Measurements, Instrumentation
• Principal Investigator: Jaime Hernando Lasso Vásquez
• Grantee: Jaime Hernando Lasso Vásquez
• Company: Mems Microssistemas Integrados Híbridos de Pressão, Indústria e Comércio Ltda (MEMS)
• City: Campinas

Abstract

The aim of this project is to build a prototype intelligent piezoresistant pressure transmitter which amplifies the pressure sensor signal and is adapted using programmable amplifiers and 16-bit CPU on a single chip. In this method, the pressure and temperature signals are treated and presented as input in the programmable amplifier, effecting the amplification, calibration, linearization and temperature compensation of the sensor signal. This transmitter can be exposed to aggressive and non-aggressive environments, being used in the measurement of gases and liquids compatible with AISI-316 steel at different temperature ranges and working pressures. The equipment is suitable for industrial applications, automotive diagnostic systems, hydraulics and other segments of the market that require high precision, high performance and excellent quality. The transmitter prototype should have: process connection nipple; environmentally-isolated piezoresistant pressure sensor; printed circuit board with signal conditioning chip; discrete components; tubiform steel casing; and electric connection. (AU)