Temperature compensation of a linear sensor

US4651292A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Edmund Jeenicke · Schwieberdingen, DE
• Manfred Schenk · Fellbach, DE
• Hans-Jorg Schmid · Langenau, DE

Key dates

• Filing date: Jan 7, 1986
• Grant date: Mar 17, 1987
• Expiry date: Jan 7, 2006

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/0092
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In the case of sensors having a characteristic for which the offset in the quiescent condition has a first temperature coefficient and the slope of the characteristic has a second temperature coefficient, while the quotient of the offset and slope coefficients is approximately constant, a point can be determined in which the characteristics for different temperatures (T) intercept. A temperature corrected measurement value can be determined, preferably with a microcomputer, from the sensor signal, the coordinates of the above-described intersection point, the sensor temperature and the temperature coefficient either of the offset or of the slope.