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Class Information
Number: 367/908
Name: Communications, electrical: acoustic wave systems and devices > Material level detection, e.g., liquid level
Description: Acoustic wave echo systems in which the reflector is a fluent material contained in a vessel.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8446796 Method and system for processing echo signals May. 21, 2013
8259533 Method and device for determining ultrasonic detecting cycle Sep. 4, 2012
8218396 Torsional ultrasonic wave based level measurement system Jul. 10, 2012
8184503 Process measurement instrument with target rejection May. 22, 2012
8154953 Remote controlled fish locating system Apr. 10, 2012
8107319 Acoustic fluid height monitoring using dynamic surface perturbations Jan. 31, 2012
8031557 Method of operating an acoustic pulse echo ranging system Oct. 4, 2011
7950424 Device and method for controlling the filling of a cup by a vending machine May. 31, 2011
7826309 Filling level measurement device and filling level measurement and monitoring method Nov. 2, 2010
7753091 Device and method for controlling the filling of a cup by a vending machine Jul. 13, 2010
7433267 Two wire resistive sensor Oct. 7, 2008
7420877 Method for processing an echo profile Sep. 2, 2008
7388810 Ultrasonic distance measurement system Jun. 17, 2008
7360417 Fluid level detector Apr. 22, 2008
7277020 Apparatus for indicating the state of a characteristic of a constituent in a container Oct. 2, 2007
7196971 Method and apparatus for damping an ultrasonic transducer suitable for time of flight ranging and level measurement systems Mar. 27, 2007
7162922 Non-invasive method for detecting and measuring filling material in vessels Jan. 16, 2007
7073379 Arrangement and procedure for the measuring of liquid level Jul. 11, 2006
6938475 Device for establishing and/or monitoring a predetermined fill level in a container Sep. 6, 2005
6932097 Acoustic control of the composition and/or volume of fluid in a reservoir Aug. 23, 2005
6911935 Field interchangeable level measurement system Jun. 28, 2005
6865137 Method for pulse offset calibration in time of flight ranging systems Mar. 8, 2005
6856576 Method for determining echo distance using autocorrelation in time of flight ranging systems Feb. 15, 2005
6816436 Method for echo processing in time-of-flight or level measurement systems Nov. 9, 2004
6771560 Method and apparatus for on-board calibration in pulse-echo acoustic ranging system Aug. 3, 2004
6640628 Level-measuring device Nov. 4, 2003
6631097 Sonic water level measuring method and system there for Oct. 7, 2003
6629457 Device for measuring a fill level of a liquid in a container Oct. 7, 2003
6621763 Power saving technique for pulse-echo acoustic ranging systems Sep. 16, 2003
6606279 Submergence detection for electro acoustic transducers Aug. 12, 2003
6556511 Method of locking onto and tracking a target Apr. 29, 2003
6545946 Method and apparatus for eliminating substantially false echoes produced by electrical noise induced into high gain receiver circuits Apr. 8, 2003
6538598 Apparatus and method for liquid level measurement in a sounding tube Mar. 25, 2003
6504793 Method and device for range measurement Jan. 7, 2003
6418080 Underwater detection apparatus Jul. 9, 2002
6345683 System and method for an improved device for measuring water levels Feb. 12, 2002
6337655 Apparatus and method for liquid level measurement in a sounding tube Jan. 8, 2002
6323441 Ultrasonic distance measuring system for monitoring railroad car loads Nov. 27, 2001
6298008 Pulse-echo system for mediums having varying densities Oct. 2, 2001
6292131 Apparatus and method for liquid level measurement and content purity measurement in a sounding tube Sep. 18, 2001
6263731 Method and assembly for monitoring a predetermined level in a container Jul. 24, 2001
6249244 Apparatus for the determination of the fill state of material in a container Jun. 19, 2001
6212943 Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment on waste water Apr. 10, 2001
6169706 Echo detection in pulse-echo ranging systems Jan. 2, 2001
6062070 Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment of waste water May. 16, 2000
6053041 Noninvasive method for determining the liquid level and density inside of a container Apr. 25, 2000
6047598 Arrangement for measuring the level of contents in a container Apr. 11, 2000
6046960 Apparatus and method for discriminating true and false ultrasonic echoes Apr. 4, 2000
5943294 Level detector for fluent material Aug. 24, 1999
5877997 Pulse echo distance measurement Mar. 2, 1999

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