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:
Aug. 11, 2020
Filed:
Feb. 14, 2017
Elmos Semiconductor Aktiengesellschaft, Dortmund, DE;
Andre Schmidt, Dortmund, DE;
Egbert Spiegel, Dortmund, DE;
Guido Schlautmann, Dortmund, DE;
Stefanie Heppekausen, Dortmund, DE;
Elmos Semiconductor Aktiengesellschaft, Dortmund, DE;
Abstract
The invention relates to an ultrasonic measuring system (), in particular for measuring distance and/or as a parking aid in vehicles, having an electroacoustic ultrasonic transducer () which has a oscillating element (), does not have a voltage converter, can be alternately operated as an ultrasonic transmitter and an ultrasonic receiver and has a signal connection (), which is used either as an input or as an output of the ultrasonic transducer (), and an earth connection () which is connected to earth, and a control and evaluation unit () for exciting the oscillating element () of the ultrasonic transducer () to emit ultrasonic waves for operating the ultrasonic transducer () during a transmission interval for the purpose of subsequently deactivating the excitation of the oscillating element () and attenuating the latter during a decay phase and for receiving and processing ultrasonic waves in a reception interval. The control and evaluation unit () has a bridge circuit () which is connected to a DC supply voltage () and has controllable switches (to) and a charge storage capacitance (), the polarity of which can be reversed and which is intended to alternately output a positive and a negative excitation voltage for the signal connection () of the ultrasonic transducer () during the transmission interval. The control and evaluation unit () outputs a voltage pulse of substantially 0 V at the end of the transmission interval for the signal connection () of the ultrasonic transducer ().