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8217766 |
Vehicle presence notification apparatus
A vehicle presence notification apparatus uses several ultrasonic transducer devices to generate a notice sound by emitting an ultrasonic wave in mid air based on an ultrasonic signal modulated...
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8217767 |
Vehicle presence notification apparatus
A vehicular horn device of an existing electromagnetic type is used as a dynamic speaker so as to generate a false engine sound. The shortage of a low-pitched sound in a parametric speaker device...
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8212656 |
Vehicle presence notification apparatus
A vehicle presence notification apparatus generates a notice sound by emitting an ultrasonic wave in mid air based on an ultrasonic signal modulated according to an audible sound. During proceeding...
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7791529 |
System for estimating the speed of an aircraft, and an application thereof to detecting obstacles
The invention relates to a method of determining an estimated speed of an aircraft relative to ground being overflown by the aircraft, in which use is made of the sum of an acceleration measurement...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4998104 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
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...
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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...
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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...
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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...
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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...
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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...
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4680739 |
Process for removing all ambiguity from the measurement by Doppler effect of the speed of a moving target
The present invention concerns a process for removing all ambiguity from the measurement by the Doppler effect of the speed of a target. It consists in obtaining a signal of Doppler shift relating...
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4506353 |
Measuring apparatus for the automatic measurement of speed, travelled distance and directional changes of a movable body
The measuring apparatus is intended for the automatic measurement of speed, travelled distance and directional changes, wherein two measuring units (3, 3a) are disposed in spaced relationship on...
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4296482 |
Parametric array Doppler sonar apparatus
Parametric array Doppler sonar apparatus includes an acoustic lens containing a flat disk-like central portion and an annular outer portion serving as a convergent lens. Multiple transducers are...
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4282586 |
Doppler log
In a Doppler log for a vehicle equipped with transmitting and receiving units associated with two mutually transverse measuring axes which are parallel to a plane defined by the longitudinal and...
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4270191 |
Doppler current meter for use at great depths
The invention relates to a device for measuring aquatic currents, placed on a moving boat comprising a Doppler effect sonar. The device comprises two sets of transducers and transmitting and...
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4216537 |
Sonar for the topographic representation of a submerged surface and underlying strata
This sonar system, placed on a vehicle such as a ship or a submarine, comprises transducer means for transmitting and receiving acoustic waves at two different frequencies, said reception means...
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4138657 |
Shipboard apparatus for measuring ocean currents
A survey ship proceeds along a desired track as determined by precision navigational aids. A doppler sonar is programmed to receive returns from various water masses circulating at various depths...
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4105991 |
Acoustic wave transmitter-receiver
Acoustic wave transmitter-receiver comprising at least one pair of transducer assemblies arranged symmetrically with respect to a vertical axis, the transducers of each assembly being lined up with...
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4104912 |
System for taking current-metering measurements
A system on board which provides measurement of flow rates of a liquid layers at different depths, the provided results being corrected from error due to the craft movement, said system being...
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4103279 |
Diver navigation system
An underwater navigation device wherein a flux gate compass provides head difference signals, a doppler navigation sonar provides drift angle signals, which signals are combined by a summer to...
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4069468 |
Doppler spectral measurement
A system for Doppler frequency measurement, responsive to spectral modulation induced by a reverberant and nonlinear radiation transmissive region such as the ocean, and composed of a Fourier...
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4065745 |
Doppler speedometer
A Doppler Speedometer for determining the speed of a vehicle, suspended in a medium, relative to the ground over which the vehicle is traveling. Radiant energy is beamed from the vehicle toward the...
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4065744 |
Doppler navigation method for determining the distance travelled by a vehicle
Method and apparatus for determining the distance travelled by a vehicle with respect to a reference surface from the frequency shift between the frequency of signals transmitted from the vehicle...
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4017823 |
Position control system for a subsea vehicle
A position control system, for use in positioning relative to a subsea well a subsea vehicle or a re-entry tool having thrusters, including a Doppler sonar system connected to the vehicle and...
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3974473 |
Cable for multiple sonar systems
In a system composed of a plurality of sonar devices mounted on a ship and arranged to operate simultaneously, each device being composed of two units between which electrical signals pass during...
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3922632 |
Automatic vehicle positioning system
A system for guiding a forerunning slave marine vehicle over a ground cou intended to be taken by an immediately following master ship regardless of the natural external ambient forces being...
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3898878 |
Ship speed indicator
A device for measuring the speed of a ship in a medium which includes two oustic projector-receiver units mounted at two points on the bottom of the ship and a logic module conveniently located...
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3863198 |
DOPPLER SONAR UTILIZING PERIOD MEASUREMENT WITH THRESHOLDED RECEIVERS
Speed measurement error due to additive noise in the receivers of period-measuring doppler sonar apparatus is reduced by performing the period measurement process when and only when the signal is...
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3818425 |
NAVIGATION SYSTEMS UTILISING THE DOPPLER EFFECT
Doppler sonar navigation system, comprising an on-board acoustic waves transmit and receive sound transducer device; transmission and reception take place in a manner known per se in four...
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3810080 |
SWIMMER-DIVE NAVIGATION AND RECONNAISSANCE DEVICE
A navigation/reconnaissance device is disclosed which comprises a hand-held ressure hull having a viewing port through which a using swimmer-diver views a drift meter for correcting his compass...
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