Self-correcting electronically scanned pressure sensor

US4399515A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventor

• Chris Gross · Yorktown, US

Key dates

• Filing date: Mar 31, 1981
• Grant date: Aug 16, 1983
• Expiry date: Mar 31, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L9/045
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

This invention is a multiple channel high data rate pressure sensing device for use in wind tunnels, spacecraft, airborne, process control, automotive, etc., pressure measurements. This device offers data rates in excess of 100,000 measurements per second with inaccuracies from temperature shifts less than 0.25% (nominal) of full scale over a temperature span of 55.degree. C. This device consists of thirty-two solid state sensors 11, signal multiplexing electronics to electronically address each sensor, and ditital electronic circuitry to automatically correct the inherent thermal shift errors of the pressure sensors and their associated electronics.