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| Number | Title | Issue Date |
| 7738318 | Method and apparatus for fault-tolerant, correlation SONAR processing A system is disclosed that enables the use of an incomplete SONAR array matrix in a correlation SONAR system. An improvement is achieved through the generation of a correlation-array model matrix of hydrophone correlations, based on an independent estimate of the sh... | 06/15/2010 |
| 7420875 | Methods and systems for use of an acoustic doppler current profiler for measurement of compact jets A method is provided for improving horizontal spatial resolution of a flow field in compact jet-like current features so as to quantify the axial velocity in the cross section of a compact jet using an Acoustic Doppler Current Profiler (ADCP). The ADCP is a four-bea... | 09/02/2008 |
| 7372395 | Ground-speed measuring apparatus This invention provides a ground-speed measuring apparatus for a vehicle that can detect a velocity along the movement of the vehicle (in the fore direction), a velocity across the movement of the vehicle (in the athwartships direction), a side-skid angle of the veh... | 05/13/2008 |
| 7310061 | Velocity sensor and ground vehicle velocity sensor using the same There is provided a highly accurate velocity sensor having a reduced detection error. A sensor circuit unit generates an electromagnetic wave and emits it from a transmission antenna. Furthermore, a reception antenna receives a reflection wave from the ground and a ... | 12/18/2007 |
| 7204123 | Accuracy enhancement of a sensor during an anomalous event A method for enhancing the accuracy of a sensor is provided. The method includes determining a measure of the output of the sensor, determining whether the measure falls outside of an acceptable range for the output of the sensor, and, when the measure falls outside... | 04/17/2007 |
| 7136736 | Vehicular travel control device In a vehicular control device, it is necessary to measure or calculate six physical quantities-forward-reverse speed, left-right speed, vertical speed, pitch angle, roll angle, and angle of sideslip-representing vehicular movement and to control the braking force of... | 11/14/2006 |
| 7133327 | Method and system for measuring the velocity of a vessel relative to the bottom using velocity measuring correlation sonar A method and a system for measuring the velocity of a vessel relative to the bottom using a velocity measuring correlation sonar are disclosed. The present invention provides a new theoretical expression for the bottom medium sonar array temporal and spatial correla... | 11/07/2006 |
| 7109920 | Moving platform position determination system and method A system and method for determining a position of a moving platform are provided. The method includes transmitting a carrier signal from one of the moving platform and a stationary platform, receiving a received signal at the other of the moving and stationary platf... | 09/19/2006 |
| 7010962 | Characterization of liquids using gas bubbles An apparatus and method is described for measuring properties of bubbles from which certain physical characteristics of the liquid in which the bubbles are generated can be determined. The evolution of a bubble includes (1) formation and growth at a nozzle disposed ... | 03/14/2006 |
| 6942619 | Ultrasound radiation device An ultrasound radiation device comprises a piezoelectric substrate, an interdigital arrangement of two comb-shaped electrodes formed on an upper end surface of the piezoelectric substrate, a counter electrode formed on a lower end surface of the piezoelectric substr... | 09/13/2005 |
| 6941196 | Modified three lobe search method A method of finding a vertical velocity of a vehicle by first forming two cost functions from three pulse return times. An independently determined approximate vertical velocity and a Fletcher-Powell estimation technique are used on the first cost function, to selec... | 09/06/2005 |
| 6445338 | Detecting apparatus of vehicle speed A detecting apparatus of vehicle speed including detecting means for emitting an electromagnetic wave or an ultrasonic wave to a road surface and detecting traveling speed of a vehicle from the Doppler effect produced in a reflected wave thereof, a transm... | 09/03/2002 |
| 6326887 | Vehicle parking aid system A parking aid system for a vehicle includes a device that measures the instantaneous distance of a vehicle part from an obstacle located in its path and generates at least one output signal indicative of the measured distance, as well as a device capable ... | 12/04/2001 |
| 6314053 | Method for detecting mobile objects with active sonar A process for making it possible to detect moving objects by an active sonar operating by the Dopper effect. The process uses, as a transmission signal, a burst of N pulses encoded so as to present a spectrum having a comb-of-lines structure. In this way,... | 11/06/2001 |
| 6229761 | Estimating ship velocity through the water and over the ground A method and system are provided to estimate a ship's velocity. Two ship sonar returns from two different directions are selected. Each return includes volume reverberation data and bottom reverberation data. Doppler shift for each of the two returns base... | 05/08/2001 |
| 6097671 | Pinwheel transducer array An acoustic transducer array in which the transducer elements project a plurality of acoustic beams which are not coplanar. In a first embodiment, a cylindrical transducer array housing has each of four transducer elements skewed at an angle relative to t... | 08/01/2000 |
| 5808967 | Two-dimensional array transducer and beamformer An acoustic array transducer capable of forming narrow dispersion, broadband or narrowband acoustic beam sets in two dimensions with a minimum aperture size. Concurrent yet independent electrical interfacing with array transducer elements allows simultane... | 09/15/1998 |
| 5694372 | Sonar system for current meter and doppler log A sonar antenna with transducers symmetrically distributed along an axis (fore/aft axis) and a perpendicular axis (starboard/port axis) in a plane on a circular base. Placement and polarities of the transducers, along with a phase and sequence of feeding ... | 12/02/1997 |
| 5583800 | Vehicle speed sensor utilizing relationship between vehicle wheel speed and doppler-effect speed The apparatus has a signal processor for determining the ground speed of a motor vehicle on the basis of the frequency of a wave transmitted from a transmitter and the frequency of the wave reflected by the ground surface and received by a receiver. The s... | 12/10/1996 |
| 5475620 | Ultrasonic measuring system An ultrasonic measuring system for a vehicle is composed of first and second ultrasonic transducing assemblies TR1 and TR2. Each transducing assembly TR1, TR2 has three ultrasonic transducers TR11, TR12, TR13, TR21, TR22, TR23 which are separated from eac... | 12/12/1995 |
| 5371718 | Doppler-effect vehicle ground speed detecting apparatus having means for sensing abnormality of detected ground speed A Doppler-effect speed detecting apparatus for detecting a ground speed of a vehicle, including a transmitter for transmitting a wave towards the ground surface, a receiver for receiving the wave reflected by the ground surface, and an output device for p... | 12/06/1994 |
| 5315562 | Correlation sonar system In a correlation device, a system and method for measuring velocities using a single coded pulse generator. The correlation device may also include maximum likelihood estimation techniques for processing the echo signals received from a plurality of trans... | 05/24/1994 |
| 5287329 | Doppler-effect vehicle ground speed detecting apparatus with means for adjusting frequency of generated wave An apparatus for detecting a vehicle ground speed, including a transmitter for transmitting a wave towards a ground surface, and a receiver for receiving a portion of the transmitted wave reflected by the ground surface. The apparatus produces an output i... | 02/15/1994 |
| 5243564 | Doppler-effect vehicle ground-speed detecting apparatus having means for detecting vehicle body inclination A Doppler-effect vehicle ground-speed detecting apparatus having a transmitter fixed to a vehicle body and transmitting a wave toward a road surface on which the vehicle is running, a receiver fixed to the body and receiving a portion of the wave reflecte... | 09/07/1993 |
| 5239516 | Ultrasonic ground speedometer utilizing doppler effect of ultrasonic waves An ultrasonic ground speedometer utilizing Doppler effect of ultrasonic waves comprises an ultrasonic transmitter for outputting an ultrasonic wave at an emitting angle against a road surface, an ultrasonic receiver for receiving a reflected ultrasonic wa... | 08/24/1993 |
| 5235557 | Combined speed and depth sensor transducer A combined speed and depth transducer adapted to be mounted flush in the hull of a ship. An acoustic depth transducer is mounted piggyback on top of an acoustic speed transducer within a single housing. A base plate is sandwiched between the depth transdu... | 08/10/1993 |
| 5224075 | Apparatus for measuring the velocity of a moving body A system measures the velocity of a moving body such as a ship and a water body. The system uses a first apparatus which measures the speed of a moving body by detecting a phase difference between a reference signal and echo signals resulting from a trans... | 06/29/1993 |
| 5148409 | Ultrasonic ground speedometer utilizing Doppler effect An ultrasonic ground speedometer utilizing Doppler effect comprises an ultrasonic transmitter for outputting an ultrasonic wave at a predetermined angle against a road surface, an ultrasonic receiver for receiving a reflected ultrasonic wave caused by ref... | 09/15/1992 |
| 5097453 | Ultrasonic ground speedometer utilizing doppler effect An ultrasonic ground speedometer utilizing Doppler effect comprises an ultrasonic transmitter for outputting an ultrasonic wave at a predetermined angle against a road surface, an ultrasonic receiver for receiving a reflected ultrasonic wave caused by ref... | 03/17/1992 |
| 5077700 | Doppler velocity profiler The velocity of a vessel is determined in real time by a doppler sonar sym providing acoustic beams wherein received beams provide a plurality of bins or returns from various depth segments. The frequency shift with respect to at least two different bins... | 12/31/1991 |
| 5054003 | Ultrasonic ground speedometer utilizing doppler effect An ultrasonic ground speedometer utilizing Doppler effect comprises an ultrasonic transmitter for outputting an ultrasonic wave having a particular wavelength at a predetermined angle against a road surface, an ultrasonic receiver for receiving a reflecte... | 10/01/1991 |
| 5050133 | Marine current determination A method for the determination of in-line and cross-line components of water velocity relative to a vessel heading on a chosen line, which method comprises the steps of: (a) generating electronic pulses and relaying these to a Doppler-Sonar transducer ali... | 09/17/1991 |
| 5038612 | Ultrasonic measuring device An ultrasonic measuring device for determining motion parameters of moved bodies, in particular path, speed, acceleration, slip and the like, comprising first and second ultrasonic transducers supported in a housing. Each of the ultrasonic transducers (tr... | 08/13/1991 |
| 5028920 | Driver alerting device A driver alerting device includes a transceiver adapted for mounting at the rearward end of a vehicle for directing its wave output rearwardly of the vehicle. Return wave signals for many objects within the transceiver range are picked up and supplied to ... | 07/02/1991 |
| 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 |
| 4914639 | Sonar doppler system with a digital adaptive filter A doppler sonar speed measuring system incorporating a digital adaptive filter responsive to the difference in newly received raw speed data and previously received speed data to determine the amount and sign of change of the previously received data. The... | 04/03/1990 |
| 4893287 | Velocity reference system A velocity reference system uses a Doppler shift between transmitted and received wave energy to determine the relative speed between the system and a surface or element. Other systems employing Doppler shifts for detecting velocity suffer from poor measu... | 01/09/1990 |
| 4837750 | Apparatus for displaying depth sounding data with nautical range Apparatus and a method for displaying depth sounding data with nautical range are disclosed for use on vessels or the like, the device including a transceiver for transmitting an acoustic signal downwardly through surrounding water and for receiving echo ... | 06/06/1989 |
| 4728954 | Ground velocity sensor with drop-out detection A vehicle-mounted ultrasonic velocity sensor includes an ultrasonic transmitter and receiver coupled to transmit and receive horns. In one embodiment, a phase-locked-loop signal processing circuit converts the transmitted and reflected frequencies into a ... | 03/01/1988 |
| 4689624 | Vehicle speedometer A vehicle speedometer is disclosed which accurately measures vehicle velocity despite significant vehicle vibration, which causes variation of the angle of incidence of the measuring wave. Two transceivers are mounted on the vehicle, along with means to d... | 08/25/1987 |
