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:
May. 04, 2010
Filed:
Apr. 20, 2006
Andreas Stelzer, Linz, AT;
Robert Hauser, Bodensdorf, AT;
Stefan Schuster, Linz, AT;
Stefan Scheiblhofer, Linz, AT;
Klaus Leitmeier, Graz, AT;
Andreas Stelzer, Linz, AT;
Robert Hauser, Bodensdorf, AT;
Stefan Schuster, Linz, AT;
Stefan Scheiblhofer, Linz, AT;
Klaus Leitmeier, Graz, AT;
AVL List GmbH, Graz, AT;
Abstract
A plurality of exchangeable, different piezoelectric pressure sensors () comprise integrated SAW elements () as identification units whose identification data can be read by an interrogation unit () via a common connection cable (). The analysis unit () for the measurement signals and the interrogation unit () for the identification data can be connected by a common coupling unit () to the connection cable (). The coupling unit () has a coupling capacity () which connects with high frequency the interrogation unit () to the signal line of the connection cable (), as well as a coupling inductance () which connects with low frequency the load amplifier () of the analysis unit () to the connection cable (), thus neatly separating the useful signal from the identification signal and keeping a high-impedance measurement chain from the sensor () to the input of the load amplifier (). An SFSCW radar can further be used to improve interrogation of the identification data.