05531118 is referenced by 9 patents and cites 16 patents.

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.

Title
Method and device for operating an ultrasonic sensor
Application Number
8/326453
Publication Number
5531118
Application Date
October 20, 1994
Publication Date
July 2, 1996
Inventor
Martin Noll
Muggensturm
DE
Peter Knoll
Ettlingen
DE
Agent
Kenyon & Kenyon
Assignee
Robert Bosch
DE
IPC
G01N 29/04
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