Method and apparatus for signal evaluation of zero-axis crossings

US5107213A · kind A · utility

Assignee

• Avl Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H. Prof.Dr.Dr.h.c. Hans List · AT

Inventors

• Martin Ponticelli · Graz, AT
• Gerald Lackner · Arnoldstein, AT

Key dates

• Filing date: Feb 11, 1991
• Grant date: Apr 21, 1992
• Expiry date: Feb 11, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P7/0775
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For evaluating the essentially-periodic signal sequence of inductive measured-value sensors in view of the appearance of zero-axis crossings, all zero-axis crossings in the sensor signal are identified in a zero-axis crossing branch of an evaluation unit and the significant zero-axis crossings are enabled in a parallel enable branch after logarithmic transformation of the sensor signal.