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5113192 |
Method for using seismic data acquisition technology for acquisition of ground penetrating radar data
A method and apparatus are used in the acquisition of data by ground-penetrating radar, wherein the signals thus obtained are input to a pre-amplifier which contains filtering component such as an...
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5081456 |
Method of detecting unknown object and apparatus therefor
In visualizing an unknown object possessed by a person to be checked, a narrow pulsating radio wave beam is scanned over the whole surface of the person to observe the intensity of a reflected...
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5057846 |
Efficient operation of probing radar in absorbing media
A ground (or similar)--probing radar system in which the signal radiation is interrupted for short intervals. Reception is possible during these intervals and the dead range is virtually eliminated.
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5057844 |
Insulated underground antenna and method for utilizing same
A passive inductively and capacitively loaded antenna is shown which is retained within a closed cel styrene foam enclosure. A method for detecting buried utility components utilizing such in...
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5051748 |
Device for transmitting and receiving microwave radiation, for forming images of buried objects
A transmitting antenna radiates a micro-wave field through an opening in the form of a rectangular wave-guide applied against the separation surface between a first medium, in which it is located,...
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5028929 |
Icing hazard detection for aircraft
An airborne Icing Hazard Detector for aircraft uses dual frequency radar beams which are transmitted into a cloud ahead of the aircraft. The reflected signals at each of the two frequencies are...
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5019822 |
Marine object detector
A system is disclosed for detecting and locating the occurrence of anomal to radio frequency electromagnetic transmission in conductive liquids. Applications are described for use in swimmer...
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5017923 |
Over the horizon communication system
An over the horizon communications system includes a transmitter for generating a signal to be communicated, an acoustic source located on the earth in a direction from the transmitter that the...
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5012248 |
Radar absorption material thickness testing device
The invention is a device for determining the thickness of radar absorption material coatings. The device comprises a radiating element assembly 22 for transmitting RF energy to and recovering...
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5000527 |
Multiple waveband optical element
A multiple-waveband, e.g., for the infra-red and millimetric RF wavebands, optical element such as a window includes a core element and respective separately made outer elements secured to the core...
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4967199 |
Ground probing radar method and apparatus
A wheeled support assembly 10 is manually pushed over the ground and has a motor 22 rotating an antenna assembly 60 about a vertical axis 24. Encoders 28 on the antenna shaft 20 and on a wheel axle...
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4951055 |
Apparatus for detecting materials buried under the ground
If electromagnetic waves are emitted from a plurality of points on the ground surface above a material (TG) buried under the ground, an echo image (EP) formed from the data of propagation times of...
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4937580 |
Geophysical radar apparatus and method
A ground probing radar is described for detecting radar reflections from underground objects. The radar is of the pulse compression type. A transmitter generates a biph Government Support The...
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4905008 |
Radar type underground searching apparatus
This radar type underground searching apparatus is a system for detecting the presence and location of buried objects such as gas pipes buried in the ground. This apparatus includes a pulse...
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4896116 |
Pulse radar method and apparatus for detecting an object
An object detection method and apparatus in which, in order to distinguish only an echo wave which is returned back from an object of interest, such as an underground buried object, from those echo...
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4843597 |
System for marine seismic exploration
System for seismic profiling of structures (2) beneath the sea bottom, comprising an acoustic transducer array (12) which synchronously and coherently generates an acoustic wave adapted to be...
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4839654 |
System for detecting underground objects
A system for detecting underground objects which uses reflected wave profile data collected for obtaining a detected image output and subjects the data to a sequence of synthetic aperture...
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4837578 |
Apparatus and method for range detection using the analytic signal identified from the received signal
A method and apparatus for use in a pulse-echo imaging or ranging system comprising means (32) for identifying the analytic signal from a received signal and means (34) for extracting ranging...
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4831383 |
System for detecting underground objects
A system for detecting underground objects is disclosed wherein image data obtained through a deep range-migration correction and image data obtained through a shallow range-migration correction...
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4814768 |
Downhole pulse radar
A borehole logging tool generates a fast rise-time, short duration, high peak-power radar pulse having broad energy distribution between 30 MHz and 300 MHz through a directional transmitting and...
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4812850 |
Method and apparatus for combining waveforms
A method and apparatus for producing data indicative of the presence of buried objects, wherein two waveforms I(t) Q(t) are combined with two reference waveforms Ir(t) Qr(t) using filters 10, 12,...
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4792804 |
Apparatus for detecting a body in motion on the ground of a protected area
An apparatus for detecting bodies in motion on the ground of a protected area, particularly for military use and the like, wherein, by means of an antenna buried and shielded from the air, an...
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4746867 |
Antenna assembly for microwave reflection survey equipment
An antenna assembly is provided for use in locating buried objects, particularly long thin objects such as pipes can be located, determining the position, and ascertaining the pipe direction by...
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4733242 |
Submarine detection system
A system for detecting the presence and depth of an object submerged in a medium having transmission characteristic substantially different than the atmosphere by means of receiving radiation from...
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4721961 |
Submarine detection system
This invention relates to a system for detecting submerged objects by receiving an incident indication of electromagnetic energy and also the reflection of said energy caused by the presence of a...
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4717252 |
Method and apparatus for detecting distance and forming image of object in turbid medium using laser
A method and system is used for detecting the presence of measuring the distance to and producing an image of, objects which, while being strongly absorbing or reflecting themselves, are hid from...
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4706031 |
Method and system for detecting an object with a radio wave
Method and apparatus for detecting an object by using a radio wave which is radiated by an antenna toward the object to be detected. An echo wave of the radio wave reflected from the object is...
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4698634 |
Subsurface inspection radar
A radar system for subsurface inspection comprising a short pulse transmitter, an antenna for radiating signals to and receiving external reflections from the surface and from below the surface...
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4691204 |
Radar apparatus
A radar apparatus for detecting a distance from a radar antenna (13) to a buried object (1) underground. The radar apparatus calculates the distance based on Maxwell's equation relating to speed of...
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4688185 |
Microwave ice accretion measuring instrument
An ice measurement instrument includes a waveguide operating in a transmission mode passing energy from an input port to an output port. The resonant frequency of the waveguide depends on the...
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4677438 |
Method and apparatus for detecting an object or a condition indicating a defect in a medium
An object detecting method and apparatus is disclosed and which operates by transmitting a wave toward an object embedded in a medium having a reflective coefficient at its surface, receiving the...
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4675595 |
Method for measuring the moisture ratio of organic material, and apparatus herefor
A method and apparatus for measuring the thickness corrected moisture ratio of a material, particularly organic material, comprising transmitting microwaves and measuring therewith the damping (A)...
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4656478 |
Passive transponder for locating avalanche victims
This transponder includes a dielectric support, an antenna and a covering layer. The central portion of the antenna forms a self induction loop which, together with the junction capacity of a...
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4654667 |
Signal-acquisition system for a circular array
A signal-acquisition system (10) for a circular antenna array (12) includes a two-dimensional compressive receiver (18) that performs a two-dimensional Fourier transformation in time and position...
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4652881 |
Efficient adaptive filter bank
An N-point Fourier transform circuit for a moving target indicator system including a delay circuit with 2N-2 delays, N frequency filters, a processor for forming a main signal and N-1 auxiliary...
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4607212 |
Method and apparatus for detection of knots or the like in sawn lumber
A method and an apparatus for detection of knots in lumber by means of microwave radiation. Radiation from a transmitter is directed toward a piece of lumber and the radiation reflected from and/or...
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4583095 |
Radar seismograph improvement
The technologies of radar, exploration seismology, and air or space transportation, are combined to provide a highly-mobile and economical system of geophysical exploration for petroleum and other...
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4507602 |
Measurement of permittivity and permeability of microwave materials
Using frequency domain techniques, the system measures the complex permittivity and permeability of different materials in the Ku band (12.4 to 18 GHz). The measuring system comprises a dual...
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4504833 |
Synthetic pulse radar system and method
The invention includes a method and apparatus for detecting geophysical phenomena by the use of a synthetic pulse radar. A radar transmitter generates a plurality of component signals of different...
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4481517 |
Echometry device and method
Devices and methods are disclosed for remote measurment of temperature (and velocity) profiles in a fluid medium (i.e., the atmosphere and/or oceans). Each device, herein called an echometer, and...
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4470123 |
Microwave ice accretion meter
A system for indicating ice thickness and rate of ice thickness growth on surfaces is disclosed. The region to be monitored for ice accretion is provided with a resonant surface waveguide which is...
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4430653 |
Earth probing radar system
A ground probing radar method and apparatus which is effective to view the earth in advance of coal mining activity provides visual display of a coal seam and particular discontinuities that may...
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4410237 |
Method and apparatus for shaping electromagnetic beams
The intensity profile of a beam of electromagnetic waves such as a laser beam is shaped by means of a diffraction grating and/or prism in the beam path. In one embodiment, beams exhibiting Gaussian...
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4408156 |
Sheet articles of non-conductive material marked for identification purposes, and method and apparatus for identifying such articles
A method of producing an identification signal for a sheet article of non-conductive material, which article is marked for identification purposes by the incorporation therein of a small quantity...
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4364008 |
Focusing probe for moisture measurement device
In an apparatus for measuring the moisture content of a target material, the apparatus has means for generating an electromagnetic wave of a microwave frequency. The electromagnetic wave is guided...
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4331957 |
Transponder for use in locating avalanche victims
A transponder adapted to be carried on the body of a person for use in locating avalanche victims is designed for cooperation with a search-transmitter and includes a receiver having a passive...
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4297699 |
Radar drill guidance system
The present invention comprises a short-pulse radar guidance tool which determines borehole-to-roof and borehole-to-floor distances along a coal seam by measuring the travel times of...
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4245191 |
Method and apparatus for detecting and measuring inclusions in subsoil
A method and apparatus is described comprising a transmitter for transmitting an unmodulated carrier of selected wave length into the ground and a receiver adapted to receive reflected signals....
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4218678 |
Synthetic pulse radar including a microprocessor based controller
This invention relates to pulse radar detection of targets in extended media, including natural phenomena such as oil, coal and ore deposits within the earth. In particular, this invention relates...
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4167736 |
Fluid flow measurement
A dielectric aerial is disposed in contact with a dielectric liquid, and projects microwave radiation thereinto. The reflected radiation is received by the aerial, and the flow rate of the liquid...
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