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:
Jan. 11, 2005
Filed:
Feb. 25, 2000
Christophe Leleu, Noya Odessa, BR;
Christophe Leleu, Noya Odessa, BR;
Actaris S.A.S, , FR;
Abstract
Propagation time Tof an ultrasound signal between two spaced-apart transducers constituting an emitter and a receiver is measured. The emitter transducer is subjected to an excitation signal of n successive pulses of period Tgiving rise to an ultrasound signal being emitted towards the receiver transducer which receives the ultrasound signal generating and outputting a receive signal. A measurement of an intermediate propagation time Tis started when the emitter transducer begins to be excited. The receive signal is detected and the oscillations in the receive signal are counted. Measurement of the intermediate propagation time Tis stopped when an ioscillation is detected. The propagation time Tis determined by taking the difference T−i×T. Advantageously, measurement of Tis stopped for an ioscillation of the receive signal that corresponds to the receive signal being at a maximum amplitude.