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:
Dec. 31, 2013
Filed:
Jan. 21, 2010
Bajram Zeqiri, Teddington, GB;
Bajram Zeqiri, Teddington, GB;
Abstract
A system () uses a pyroelectric membrane () and an ultrasound absorber () to measure the amount of ultrasonic energy received from a transmitter () through a sample (). The thermal response of the pyroelectric membrane () is sensitive to ultrasound time-averaged intensity but is insensitive to the phase of the ultrasound. A waveform () shows rising (), peak () and decaying () portions of a signal from the pyroelectric membrane () in response to on/off transitions of the transmitter (). A system () uses a peak detector () to automatically turn the transmitter () on/off. A system () has background removal circuitry () to remove unwanted accelerometer-induced noise or electrical noise. A multi-element ultrasonic sensor () has cavities () so that a dummy sensor () can be used to compensate for unwanted accelerometer sensitivity of a sensor element (). A sensor () has ultrasound absorbing (or reflective) regions () to compensate for unwanted accelerometer sensitivity. A system () has a low frequency path () sensitive to the pyroelectric effect, and a high frequency path () sensitive to the acoustic pressure amplitude, of a signal from a sensor (). A sensor () uses a pyroelectric material () with poled regions () separated by a non-poled region ().