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| Number | Title | Issue Date |
| 7106657 | Digital sounder module and method for detecting The invention is a digital sounder module and its method for detection. The digital sounder module includes a sonar carrier wave producing means, a band-pass filter, a pre-amplifier for providing a high sensitivity and extending a wide dynamic range, and an analog-t... | 09/12/2006 |
| 6950372 | Digital sounder module and method for detecting The invention is a digital sounder module and its method for detection. The digital sounder module includes a sonar carrier wave producing means, a band-pass filter, a pre-amplifier for providing a high sensitivity and extending a wide dynamic range, and an analog-t... | 09/27/2005 |
| 6909397 | Stabilizing motion in a radar detection system using ultrasonic radar range information One preferred embodiment of the present invention provides a system and method for suppressing motion artifacts introduced by movement of a radar detection system. Briefly described, in architecture, one embodiment of the system, among others, can be implemented as ... | 06/21/2005 |
| 6185505 | Broad ocean bathymetric fix A method of correcting errors in in inertial navigation system, without imposing restrictions on the ships course, utilizing bathymetric data collected during the Ocean Survey Program (OSP). As the ship is in transit in or crosses an OSP swath, sonar tran... | 02/06/2001 |
| 5455805 | Ultrasonic measuring apparatus having adjustable gain control In an ultrasonic measuring apparatus for emitting an ultrasonic pulse, receiving reflected echos and producing an echo signal representative of the echos resulting from each impulse, each echo signal has a first portion corresponding to echos from one gro... | 10/03/1995 |
| 5425000 | Spatial rejection of direct blast interference in multistatic sonars A multistatic sonar system (50) employing a short duration automatic gain control (AGC) following beamforming of the return signal to reject spatial transients at the sonar waveform leading and trailing edges. The output of the beamformer (58) is delayed ... | 06/13/1995 |
| 5392257 | Sonar receiver with improved time varied gain correction Individual elements of a sonar receiver transducer provide output signals in response to the receipt of acoustic energy and signals are processed to form one or more receiver beams for display. Each element output is provided to a preamplifier to which is... | 02/21/1995 |
| 5260912 | Side-looking fish finder A side-looking fish finding apparatus transmits a sonar pulse approximately horizontally into a body of water, and then monitors echoes from the pulse. The time interval between successive sonar pulses is varied in a random manner in order to permit two o... | 11/09/1993 |
| 5260910 | High resolution acoustic pulse-echo ranging system The uncertainty inherent in high-resolution acoustic pulse-echo distance measuring systems which depend on threshold detection is overcome by transmitting a multi-cycle shot of acoustic energy having a sharply peaked amplitude profile, and locating the pe... | 11/09/1993 |
| 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 |
| 5121364 | Time frequency control filter for an ultrasonic imaging system A phased array sector scanning ultrasonic imaging system produces digitized baseband samples of the received ultrasonic echo signals amplified by a time gain control (TGC) to compensate for dispersion losses in the media in which the ultrasonic signals pr... | 06/09/1992 |
| 5068833 | Dynamic control circuit for multichannel system This invention provides an improved circuit for dynamically controlling a predetermined characteristic of each input channel of a system having a plurality of input channels to achieve a desired characteristic profile with predetermined time variances in ... | 11/26/1991 |
| 5058083 | Flexducer preamplifier power controller Linear and switching amplifiers associated with acoustic transducers requ a gradual turn-on rather than an abrupt full-power level signal. A transducer preamplifier power controller circuit prevents the operation of fuses and the tripping of circuit brea... | 10/15/1991 |
| 5046053 | Acoustic signal detection circuit An acoustic signal receiving and processing circuit provides an output signal that enables a distance to be determined between a transmitter and a sensor. The circuit comprises a sensor which receives both noise and acoustic position signals, the acoustic... | 09/03/1991 |
| 5043950 | Apparatus and method for distance determination The disclosure is directed to an apparatus and method for determining the travel time of acoustic energy over an unknown travel distance between an acoustic transmitter and an acoustic receiver. This information can be used, for example, to determine the ... | 08/27/1991 |
| 5012449 | Sonic flow meter A gain-controlled amplifier (24) in a sonic flow meter accepts an output signal from each transducer of a plurality of pairs of transducers (1a, 1b; 2a, 2b; 3a, 3b; and 4a, 4b) in sequence. A ramp generator (62) generates a time-varying-gain output, which... | 04/30/1991 |
| 4975889 | Acoustic ranging apparatus and method An acoustic ranging apparatus directs a burst of acoustic energy toward an acoustically reflective target object. The time it takes for an echo to return to the ranging apparatus is measured to determine the distance between the ranging apparatus and the ... | 12/04/1990 |
| 4955000 | Ultrasonic personnel location identification system An ultrasonic system for identifying the location of personnel within a multiple room complex. The system includes ultrasonic transmitters adapted to be transported by the personnel. The transmitters periodically transmit pulse code modulated (PCM) transm... | 09/04/1990 |
| 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 |
| 4873676 | Sonar depth sounder apparatus An improved microprocessor-controlled sonar depth sounder, which is automatically operative to detect and lock to the bottom of a body of water, fill in the display below the detected bottom, change display scales in response to the detected bottom going ... | 10/10/1989 |
| 4858203 | Omnidirectional distance measurement system Disclosed herein is an omnidirectional distance measurement system which transmits and receives ultrasound waves using as many as four transmitting-receiving transducers having specially shaped beamwidths. Through the use of four such ultrasonic transduce... | 08/15/1989 |
| 4829490 | Electrical signal discrimination The electrical response of a transducer contains a data-providing signal or signals superimposed on an unwanted time-variable background signal which is independent of the data-providing signal or signals. A system processing the transducer response utili... | 05/09/1989 |
| 4785429 | Range control system A range control system positioned within a stationary housing comprising: a pulse oscillator for providing a clock signal; and a transmitter receiver circuit that directionally transmits an acoustic pulse signal to a target and receives an echo from the t... | 11/15/1988 |
| 4675854 | Sonic or ultrasonic distance measuring device The sonic or ultrasonic distance measuring device used for example to measure the filling level in a container comprises an electroacoustic transducer which operates alternately as transmission transducer for the transmission of sonic or ultrasonic pulses... | 06/23/1987 |
| 4644512 | Sonar depth finder with relative depth LCD display A computer system is proposed for finding and displaying the depth and depth related values of an object in an aquatic environment in which and LCD display is subdivided into segments each representing a fraction of the total depth range in which the syst... | 02/17/1987 |
| 4464738 | Sonar distance sensing apparatus A distance sensing apparatus is provided in the form of a case housing electronic equipment including a piezoelectric transducer for radiating pulsed sonic or ultrasonic signals along a measurement path through a sound horn (3) which creates a narrow beam... | 08/07/1984 |
| 4452085 | Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like A time gain control (TGC) signal for a variable gain amplifier in an ultrasonic scanner is derived by determining the attenuation at many levels in the object under examination and then constructing the TGC signal based on the cumulative attenuation of an... | 06/05/1984 |
| 4451909 | Ultrasonic wave distance detection system In an ultrasonic wave distance detection system, an ultrasonic wave pulse radiated into the selected area is reflected on an object. Said reflected ultrasonic wave pulse is partly received by an ultrasonic wave transducer. The received signal is supplied ... | 05/29/1984 |
| 4439846 | Sonar rangefinder system An ultrasonic rangefinder system for use in either an ultrasonic rangefinder camera or a general purpose ultrasonic rangefinder designer's kit provides a plurality of automatic sonic rangefinder functions when embodied in the photographic rangefinder came... | 03/27/1984 |
| 4420824 | Sonar apparatus having improved gain control A sonar device for use on a boat to indicate the depth of water on a digital display, including a transducer positioned in the water to transmit bursts of sound energy and for receiving echo energy reflected from the bottom, at least one variable gain rec... | 12/13/1983 |
| 4415897 | Precision control of RF attenuators for STC applications Two STC configurations for precision control of RF attenuators, each configuration utilizing a log-scale electronic attenuator, are disclosed. The first configuration includes a D/A converter/linear-to-log module combination to provide a log range ramp; t... | 11/15/1983 |
| 4413518 | Apparatus and method for measuring the extension of bolts under stress A bolt elongation measurement apparatus and method for measuring the length of bolts of all sizes and shapes. The apparatus utilizes a microprocessor-based digital system including a binary counter which counts pulses generated by a high frequency oscilla... | 11/08/1983 |
| 4398423 | Ultrasonic signal processing apparatus A defect-responsive echo signal received by a transducer for transmitting and receiving an ultrasonic pulse beam is converted into a digital echo signal by an analog-to-digital converter. The amplitude of the digital echo signal is amended with compensati... | 08/16/1983 |
| 4378596 | Multi-channel sonic receiver with combined time-gain control and heterodyne inputs In a receiver for pulsed ultrasonic beams, it is sometimes desirable to translate the received signal to a lower carrier frequency by a heterodyne process. It is also often desirable to vary the receiving channels' gain during the period when signals are ... | 03/29/1983 |
| 4375166 | Ultrasound examination apparatus comprising a mosaic of transducers of an electrostrictive material An ultrasound examination apparatus comprises a processing circuit for echo signals from a mosaic of ultrasonic transducers which are made of an electrostrictive material with a non-remanent polarization. These signals are applied to processing channels w... | 03/01/1983 |
| 4316270 | Digital time-delay beamformer for sonar systems There is described a digital sonar receiver having a novel beamformer, own doppler nullifier (O.D.N.), and adaptive time varied gain controller. The beamformer interrogates a multi-element transducer by utilizing an interleaved sampling scheme which sampl... | 02/16/1982 |
| 4315325 | Echo ranging pulse discrimination circuit An improved echo ranging system is disclosed which features improved circuitry for discrimination of received reflected pulses from noise. Discrimination is performed by comparison of the input pulses to a time-varying threshold voltage wherein the thresh... | 02/09/1982 |
| 4307456 | Ultrasonic rangefinder An ultrasonic rangefinder providing a correct distance measurement and comprising a first transducer for transducing electric signals into ultrasonic waves and transmitting the ultrasonic waves, a second transducer for receiving the ultrasonic waves and t... | 12/22/1981 |
| 4274148 | Digital time-delay beamformer for sonar systems There is described a digital sonar receiver having a novel beamformer, own doppler nullifier (O.D.N.), and adaptive time varied gain controller. The beamformer interrogates a multi-element transducer by utilizing an interleaved sampling scheme which sampl... | 06/16/1981 |
| 4264788 | Damped ultrasonic detection unit This invention relates to damping pads and accoustical horns for use with transducer assemblies. The problems of proximity detection ranges, subfreezing operating temperature ranges, ringing and backwave reflection are addressed. In a preferred embodiment... | 04/28/1981 |
