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. 02, 1996
Filed:
Oct. 20, 1994
Peter Knoll, Ettlingen, DE;
Martin Noll, Muggensturm, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method and a device for operating an ultrasonic sensor, in which the measuring sensitivity is monitored and the measuring result is compensated for temperature. This is accomplished by measuring the distance of a fixed marking, which is situated on the vehicle and has a known distance from the ultrasonic sensor, to extract a signal, whose amplitude is a measure of the sensitivity of the ultrasonic sensor. From the measured delay time and the theoretical delay time to the marking, a value is attained, which is a measure of the temperature of the ambient air. Suited as a marking is, for example, an edge of a raised license plate frame, which is mounted on a bumper bar of a motor vehicle and lies within the detecting range of the ultrasonic sensor.