The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 1996
Filed:
Jun. 30, 1994
Applicant:
Inventors:
Roy E Hunninghaus, Des Plaines, IL (US);
Peter W Murphy, Lake Zurich, IL (US);
Kevin M Andrews, Kenosha, WI (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73 3505 ;
Abstract
A knock detection method and apparatus integrates a knock sensor signal (107) over a first period and provides a first integrated knock sensor signal (119), and integrates the knock sensor signal (107) over a second period and provides a second integrated knock sensor signal (139). A knock indication (131) is provided dependent on an amplitude of the first integrated knock sensor signal (119) and an amplitude of the second integrated knock sensor signal (139) and independent of the influence of the variations of the knock sensor (101) potential sensor to sensor gain variation.