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| Number | Title | Issue Date |
| 7417919 | Determination of sensor distance Apparatus is described for accurately determining the elevation, E, of a pulse-echo ultrasonic range sensor (2) relative to a datum level (14). The figure shows vertical elevations of the apparatus with plate deployed at level-1 (12) and ... | 08/26/2008 |
| 7330398 | Ultrasonic range finder The present invention is intended to provide an ultrasonic range finder to measure a distance quickly and precisely under different environments. The ultrasonic range finder comprises a casing, an ultrasonic transmitting/receiving unit, a signal processing circuit c... | 02/12/2008 |
| 7301853 | Tubular measuring device A tubular measuring device, comprising an electronic distance measuring device, a first tubular end locator attached to the electronic distance measuring device, a target for the electronic distance measuring device; and a second tubular end locator attached to the ... | 11/27/2007 |
| 7263031 | Distance measuring device for acoustically measuring distance A distance measuring device includes a transmitter for transmitting an acoustic signal at a distant object, an acoustic signal receiver for receiving a reflected acoustic signal reflected from the distant object, a temperature sensor detecting air temperature, a hum... | 08/28/2007 |
| 7149151 | Ultrasound transducer for application in extreme climatic conditions The invention relates to an ultrasound transducer in particular for application in ultrasound anemometry, comprising an electromechanical transducer (1) with an acoustically active surface, an acoustic matching layer (3) arranged between the acoustic s... | 12/12/2006 |
| 7106658 | Navigation system and method using directional sensor An apparatus for determining a position includes a source which transmits a signal having a source position and a transmission time coded therein. A sensor having a directional beam pattern is positioned at the location of interest. A signal processor steers the dir... | 09/12/2006 |
| 7072245 | Sonar object detection system An airborne sonar collision avoidance system is disclosed. The system compensates for changes in temperature in real time to provide more accurate sonar detection. In addition, the sensors are arranged in a communications network that allows for the sensors to be pr... | 07/04/2006 |
| 6859418 | Sonar object detection system An airborne sonar collision avoidance system is disclosed. The system compensates for changes in temperature in real time to provide more accurate sonar detection. In addition, the sensors are arranged in a communications network that allows for the sensors to be pr... | 02/22/2005 |
| 6836449 | Acoustic method and device for distance measurement An acoustic method for measuring of a distance between an emitter of acoustic energy and a target object provides for an accurate measurement by having the measurement's outcome invariant to the speed of sound variations along the acoustical path between the emitter... | 12/28/2004 |
| 6738312 | Arrangement and method for measuring the speed of sound The invention relates to an arrangement for measuring the speed of sound, the arrangement comprising: an electrical pulse generating means (402) for generating an output electrical pulse signal (404), a transmitting transducer (403) for converti... | 05/18/2004 |
| 6631097 | Sonic water level measuring method and system there for A sonic water level measuring method and system for mounting a wave-guide tube for measuring a water level in a reservoir, a river, etc. generating sonic pulses at the upper of the wave-guide tube, measuring transit times that it takes for the sonic pulse... | 10/07/2003 |
| 6628570 | Laser velocimetry detection of underwater sound An apparatus for determining the velocity of sound waves which includes a liquid medium having a plurality of gas bubbles. In the liquid medium, a laser transmits a light pulse to interact with the bubbles excited by the sound wave. Backscattered light fr... | 09/30/2003 |
| 6577557 | Water column sound speed profiling system A system and method for determining a sound speed profile of a water column. A free falling sound source is deployed in the water at a known location and time. The sound source transmits acoustic pulses omnidirectionally therefrom at predetermined times a... | 06/10/2003 |
| 6463009 | Position detecting device and industrial vehicle having the position detecting device In a position detecting device which detects a piston rod based on the time elapsed from a point at which an ultrasonic wave is emitted from an ultrasonic wave sensor toward a lower end surface of the piston rod reciprocatingly moved linearly by supply an... | 10/08/2002 |
| 6215732 | Expendable device for measurement of sound velocity profile A system for determining the sound velocity profile in a medium, such as water, includes an acoustic signal transmitting system at a transmitting location and an acoustic signal receiving and processing system at a receiving location. In one example, the ... | 04/10/2001 |
| 6088297 | Acoustic sound speed profiling system An acoustic sound speed profiling system is provided. The system includes a sound emitter and a series of sensors or hydrophones spaced vertically in a water column. The sound emitter is a high-frequency sound source adap for mounting on the front end ... | 07/11/2000 |
| 5734623 | Fiber optic sound velocity profiler A fiber optic cable, coated to increase its sensitivity to acoustic press, is towed through a medium. The optical fiber contains Bragg grating sensors at regular intervals along its length. A steerable array of transducers sends a pulse of sound in the d... | 03/31/1998 |
| 5696736 | Hydrophone for determining direction of underwater sound The invention is directed to an improved acoustic sensor system for detering the direction of underwater sound signals relative to a user is disclosed. The sensor system includes first and second sensing means for sensing incoming acoustic energy and for... | 12/09/1997 |
| 5568449 | Methods and apparatus for use in ultrasonic ranging An ultrasonic probe utilized in an ultrasonic ranging system for determining fluid volume and/or fluid leakage in an underground storage tank, as well as monitoring fluid inventory, is provided which is characterized by (i) having its calibration reflecto... | 10/22/1996 |
| 5442592 | Ultrasonic distance meter An ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a reference unit. In each of the units, a repetitive series of pulses is generated, each having a repetition rate directly relate... | 08/15/1995 |
| 5432752 | System for acoustically measuring the length of a pipe A calibration pipe having a predetermined length is connected to an end of a pipe to be measured. A sound emitter and a sound receiver are connected to a base end of the calibration pipe. The sound emitter emits a sound into the calibration pipe and the p... | 07/11/1995 |
| 5341345 | Ultrasonic stand-off gauge An ultrasonic stand-off gauge for use in measuring the instantaneous stand-off distance between the drill stem and the borehole wall while drilling. A primary transducer mounted on the drill collar sends and receives ultrasonic pulses between the drill co... | 08/23/1994 |
| 5339282 | Resolution enhancement for ultrasonic reflection mode imaging An annular array scanner utilizes a synthetic focusing approach to improve imaging results. Image sharpening methods include corrections for the speed of sound of the image, phased array misregistration and separate view misalignment as well as inverse fi... | 08/16/1994 |
| 5280457 | Position detecting system and method A detecting system and method of determining the position of a mobile point of interest in a m dimensional coordinate system having an ultrasonic transmitter mounted on the point of interest, and a plurality of stationary ultrasonic receivers, the number ... | 01/18/1994 |
| 5274328 | Temperature compensation for magnetostrictive position detector In a position detection probe having a magnetostrictive wire stretched between a head and a reflective foot end termination, and a magnet displaceable along the probe and using the sonic pulse propagation time from the magnet to the foot as a position det... | 12/28/1993 |
| 5195059 | Acoustic pipe length measuring apparatus An acoustic pipe length measuring apparatus for measuring the length of a pipe-like member in accordance with the time between the emission of a pulse-like sound wave from a speaker at one end thereof and the collection of sound waves reflected at the oth... | 03/16/1993 |
| 5160933 | Radar altimeter with self-calibration feature A radar altimeter incorporates circuitry for automatically adjusting altitude readings for variations caused by altitude and temperature changes. Normal target tracking of the radar is intermittently interrupted and a calibration sequence is interjected. ... | 11/03/1992 |
| 5150334 | System and method for ultrasonic measurement of material level A system for monitoring level of material in a vessel that includes a transducer for transmitting an ultrasonic signal toward and receiving an echo signal from a surface of the material, and a power switch coupled to the transducer for energizing the tran... | 09/22/1992 |
| 5140859 | Long range ultrasonic distance measuring system A master transceiver and a slave transceiver are employed for providing an accurate measurement of the distance between two locations in which these transceivers are situated. A pulse signal is generated by the master transceiver, which requires a time pe... | 08/25/1992 |
| 5065371 | Depth finder having variable measurement capabilities A depth finder utilizing a CPU to control the function of various components including a transducer, receiver, and a liquid crystal display, allowing a user to select between fresh and salt water operational modes as well as between English and metric dis... | 11/12/1991 |
| 4995011 | Acoustic mapping system using tomographic reconstruction A technique for the non-intrusive position determination of one or more natural or artificial acoustic transmitters (S1, S2, S3) in marine or terrestrial environments by processing data from five or more receivers (R1, R2, R3, R4, R5) distributed in the a... | 02/19/1991 |
| 4992993 | Correction for variable water-column velocity in seismic data In a marine seismic survey, a method for measuring the acoustic properties of the water mass at each seismic station along a line of survey by recovering acoustic reflections from discrete discontinuities within the water above the water-bottom reflection... | 02/12/1991 |
| 4976149 | Ultrasonic distance sensor and monitoring of surface profile utilizing ultrasonic distance sensor An ultrasonic distance sensor generates ultrasonic waves and transmit same toward a target surface, the distance to which is to be measured, through a predetermined path. The sensor is also provided with a reference surface which reflects ultrasonic waves... | 12/11/1990 |
| 4970705 | Constant focal length acoustic lens A temperature compensation system that adjusts the temperature of an acoustic lens fluid in a prescribed manner to maintain the index of refraction of the fluid constant relative to the surrounding water thereby maintaining the focal length of the lens co... | 11/13/1990 |
| 4964104 | System for measuring position using electronic or ultrasonic devices A system for measuring the position of a moving object including transceiver means for sending signals to and receiving signals reflected from both a moving object and a reference object maintaining a known, fixed distance from the moving object, wherein ... | 10/16/1990 |
| 4949321 | Ultrasound echo profile sensor used as tactile sensor An ultrasound echo profile sensor for use as a tactile sensor, having an ultrasound measuring head containing a transmitter and a receiver and also having an entrained reference reflector by means of which the current speed of sound of the ambient air can... | 08/14/1990 |
| 4942558 | Ultrasonic velocity sensor An ultrasonic ground speed sensor has a single transducer which both transmits and receives ultrasonic signals. The sensor is mounted on a vehicle in alignment with the direction of the vehicle, the transducer having a built-in angle with the body of the ... | 07/17/1990 |
| 4935884 | Sonic pipe length detector An apparatus for determining the length of an open or closed-end pipe by measuring the propagation delay of a sound pulse transmitted down the pipe bore. The apparatus includes an acoustic transducer, an acoustic detector and associated circuitry for comp... | 06/19/1990 |
| 4930350 | Acoustical length measurement An apparatus and method for measuring the length of a tubular body. The apparatus comprises: a transmitter (10) positioned at first end of the tubular body (12) for transmitting an acoustical signal along the interior of the body (12), a reflecting medium... | 06/05/1990 |
| 4914638 | Doppler effect speedometer A speedometer is provided for determining speed by providing a sound signal at a first frequency, receiving a second signal which is the reflection of the first signal, and determining difference in frequency between the first and second signals created b... | 04/03/1990 |
