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Class Information
Number: 367/902
Name: Communications, electrical: acoustic wave systems and devices > Speed of sound compensation
Description: Acoustic wave echo systems or distance and direction finding systems wherein correction is made for errors which would otherwise be introduced by variations in the propagation of acoustic waves.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8670290 Method for determining the location of an impact on a surface of an object Mar. 11, 2014
8656781 Method and system for compensation of ultrasonic sensor Feb. 25, 2014
8582393 Method and apparatus for controlling temperature of an acoustic transducer Nov. 12, 2013
8559267 Methods and apparatus of borehole seismic surveys Oct. 15, 2013
8274860 Distance measurement apparatus and related methods Sep. 25, 2012
8081539 Ultrasonic sensor Dec. 20, 2011
8059490 Ultrasonic sensor Nov. 15, 2011
7486590 Ultrasonic sensor comprising an adjustable detection area Feb. 3, 2009
7453762 Apparatus and method of auto frequency calibration for transducer Nov. 18, 2008
7417919 Determination of sensor distance Aug. 26, 2008
7330398 Ultrasonic range finder Feb. 12, 2008
7263031 Distance measuring device for acoustically measuring distance Aug. 28, 2007
7106658 Navigation system and method using directional sensor Sep. 12, 2006
7072245 Sonar object detection system Jul. 4, 2006
6859418 Sonar object detection system Feb. 22, 2005
6836449 Acoustic method and device for distance measurement Dec. 28, 2004
6738312 Arrangement and method for measuring the speed of sound May. 18, 2004
6631097 Sonic water level measuring method and system there for Oct. 7, 2003
6628570 Laser velocimetry detection of underwater sound Sep. 30, 2003
6577557 Water column sound speed profiling system Jun. 10, 2003
6463009 Position detecting device and industrial vehicle having the position detecting device Oct. 8, 2002
6215732 Expendable device for measurement of sound velocity profile Apr. 10, 2001
6088297 Acoustic sound speed profiling system Jul. 11, 2000
5734623 Fiber optic sound velocity profiler Mar. 31, 1998
5696736 Hydrophone for determining direction of underwater sound Dec. 9, 1997
5568449 Methods and apparatus for use in ultrasonic ranging Oct. 22, 1996
5442592 Ultrasonic distance meter Aug. 15, 1995
5432752 System for acoustically measuring the length of a pipe Jul. 11, 1995
5341345 Ultrasonic stand-off gauge Aug. 23, 1994
5339282 Resolution enhancement for ultrasonic reflection mode imaging Aug. 16, 1994
5280457 Position detecting system and method Jan. 18, 1994
5274328 Temperature compensation for magnetostrictive position detector Dec. 28, 1993
5195059 Acoustic pipe length measuring apparatus Mar. 16, 1993
5160933 Radar altimeter with self-calibration feature Nov. 3, 1992
5150334 System and method for ultrasonic measurement of material level Sep. 22, 1992
5140859 Long range ultrasonic distance measuring system Aug. 25, 1992
5065371 Depth finder having variable measurement capabilities Nov. 12, 1991
4995011 Acoustic mapping system using tomographic reconstruction Feb. 19, 1991
4992993 Correction for variable water-column velocity in seismic data Feb. 12, 1991
4976149 Ultrasonic distance sensor and monitoring of surface profile utilizing ultrasonic distance sensor Dec. 11, 1990
4970705 Constant focal length acoustic lens Nov. 13, 1990
4964104 System for measuring position using electronic or ultrasonic devices Oct. 16, 1990
4949321 Ultrasound echo profile sensor used as tactile sensor Aug. 14, 1990
4942558 Ultrasonic velocity sensor Jul. 17, 1990
4935884 Sonic pipe length detector Jun. 19, 1990
4930350 Acoustical length measurement Jun. 5, 1990
4914641 Ultrasonic measuring device and method Apr. 3, 1990
4914638 Doppler effect speedometer Apr. 3, 1990
4901292 Method for the position detection of the strip edge of a material web Feb. 13, 1990
4868797 Time-shared AGC for ultra-sound liquid level meter Sep. 19, 1989

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