Title:
SELF-ALIGNING ULTRASONIC SENSOR SYSTEM, APPARATUS AND METHOD FOR DETECTING SURFACE VIBRATIONS
Document Type and Number:
WIPO Patent Application WO2002065068
Kind Code:
A3
Abstract:
Ultrasonic transducing elements (11, 12) are used to measure vibrations of a nearby musical drumhead or other vibrating surface (13). A first ultrasonic transducer (11) emits an ultrasonic signal (14) and a second ultrasonic transducer (12) listens for an echo of that signal (14). A phase change of the echoed (reflected) signal (202) is compared to a reference signal (206) to create a representation signal (216) which represents the movement of the drumhead or other vibrating surface (13). For this comparison to be properly made, a deviation signal (220) is generated that defines an average deviation of the reference signal (206) from optimum, which is then used to self-align the referee signal (206) to the reflected signal (202).
Inventors:
STUEBNER FRED (US)
ARONSTEIN JESSE (US)
ARONSTEIN JESSE (US)
Application Number:
PCT/US2002/000573
Publication Date:
November 14, 2002
Filing Date:
January 09, 2002
Export Citation:
Assignee:
PROTUNE CORP (US)
STUEBNER FRED (US)
ARONSTEIN JESSE (US)
STUEBNER FRED (US)
ARONSTEIN JESSE (US)
International Classes:
G01H3/12; G01H9/00; G01N29/07; G01N29/42; G01N29/44; (IPC1-7): G01H9/00
Foreign References:
| US4589324A | 1986-05-20 | |||
| US4741242A | 1988-05-03 |
Other References:
YOUNG C W ET AL: "AN ADVANCE ULTRASONIC SYSTEM FOR VIBRATION MEASUREMENT", ADVANCES IN INSTRUMENTATION AND CONTROL, INSTRUMENT SOCIETY OF AMERICA, RESEARCH TRIANGLE PARK, US, vol. 51, no. PART 2, 1996, pages 811 - 816, XP000639424, ISSN: 1054-0032
PERSSON H W ET AL: "Remote vibration measurements using airborne ultrasound", ULTRASONICS SYMPOSIUM, 1996. PROCEEDINGS., 1996 IEEE SAN ANTONIO, TX, USA 3-6 NOV. 1996, NEW YORK, NY, USA,IEEE, US, 3 November 1996 (1996-11-03), pages 689 - 692, XP010217807, ISBN: 0-7803-3615-1
BOU MATAR O ET AL: "Performances of the parametric acoustic vibrometer for vibration sensing", ULTRASONICS SYMPOSIUM, 1997. PROCEEDINGS., 1997 IEEE TORONTO, ONT., CANADA 5-8 OCT. 1997, NEW YORK, NY, USA,IEEE, US, 5 October 1997 (1997-10-05), pages 605 - 608, XP010271329, ISBN: 0-7803-4153-8
PERSSON H W ET AL: "Remote vibration measurements using airborne ultrasound", ULTRASONICS SYMPOSIUM, 1996. PROCEEDINGS., 1996 IEEE SAN ANTONIO, TX, USA 3-6 NOV. 1996, NEW YORK, NY, USA,IEEE, US, 3 November 1996 (1996-11-03), pages 689 - 692, XP010217807, ISBN: 0-7803-3615-1
BOU MATAR O ET AL: "Performances of the parametric acoustic vibrometer for vibration sensing", ULTRASONICS SYMPOSIUM, 1997. PROCEEDINGS., 1997 IEEE TORONTO, ONT., CANADA 5-8 OCT. 1997, NEW YORK, NY, USA,IEEE, US, 5 October 1997 (1997-10-05), pages 605 - 608, XP010271329, ISBN: 0-7803-4153-8
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