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6087973 Increased accuracy of range measurement between data link systems  
A method for increasing the accuracy of ranging measurements between data link systems is described. The method, actively aided ranging, increases ranging measurement accuracy by decreasing the...
6087978 Level measuring device operating with microwave  
A level measuring device suitable for highly accurate measurements. A transmission pulse generator generates microwave pulses at a transmission repetition rate and transmits them through an...
6087976 Radar object detection system having normalized range sensitivity  
An improved obstacle detection radar system and method of operation in which the detection sensitivity is normalized with respect to target range without significantly increasing system complexity...
6081221 Signal processing and systematic phase coding for mitigation of range and velocity ambiguities in Doppler weather radars  
A method for resolving range ambiguities and separating overlaid signals in a Doppler weather radar is proposed. For uniform PRT transmission, it consists of a special deterministic code for...
6078786 Method and device for measuring the distance between two stations connected by a communications channel  
The invention relates to a method and a device for distance measuring between two stations (A1, B1) connected by a communication channel. The method is based on a command structure, wherein the...
6078280 Periodic probe mapping  
A method and apparatus for processing a time domain reflectometry (TDR) signal having a plurality of reflection pulses to generate a valid output result corresponding to a process variable for a...
6064331 Pulse repetition frequency section method and system  
The objectives of the invention are met by an improved radar tracking system and a process of radar tracking. In the improved system and process, an estimate of a target range and a range...
6064942 Enhanced precision forward observation system and method  
An enhanced precision forward observation system and method employs a satellite positioning system receiver, range finder, and a compass/inclinometer. The satellite positioning system receiver is...
6023237 Method and device for measuring the distance between an object and an apparatus for measuring said distance  
PCT No. PCT/EP97/02156 Sec. 371 Date Nov. 16, 1998 Sec. 102(e) Date Nov. 16, 1998 PCT Filed Apr. 25, 1997 PCT Pub. No. WO97/43663 PCT Pub. Date Nov. 20, 1997The measurement apparatus (1) delivers...
6018698 High-precision near-land aircraft navigation system  
An aircraft including an approach and landing system, including a navigation unit for providing navigation information, a weather radar unit for providing radar information, a processor which...
6018308 Obstacle recognition system for automotive vehicle  
An obstacle recognition system for automotive vehicles is provided which is designed to distinguish preceding vehicles from other objects and uses data thereof in intervehicle distance control,...
6002707 Spread signal spectrum communication circuits and system  
The present invention provides a covert radar system in which radar signals emitted are capable to search receiver thermal noise and, therefore, are substantially undetectable in the normal radar...
5982286 Object detecting apparatus  
An object detecting apparatus includes at least one transmitter and receiver pair having a transmitter for transmitting waves and a receiver for detecting reflected waves caused by objects...
5923282 Radar system  
A radar system capable of identifying discriminatively multiple reflected waves generated between the radar system and a target (6) to thereby identify discriminatively a first echo indicating a...
5842156 Multirate multiresolution target tracking  
A multiresolution, multirate approach for detecting and following targets. The resolution of data obtained from a target scanning region is reduced spatially and temporally in order to provide to...
5825324 Passive ranging of a noise beacon using correlation monopulse processing on the direct and bounce emissions  
In accordance with the teachings of the present invention, a passive tracking system (30) and method of passively determining a range (R) to a remote signal emitter (10) elevated a distance above...
5760731 Sensors and methods for sensing displacement using radar  
A sensor for sensing a displacement in a mechanical system using radar utilizes a miniaturized radar transceiver formed, typically, on a silicon chip. The transceiver is mounted to a fixed surface...
5710621 Heterodyne measurement device and method  
A heterodyne measurement system and method for determining a distance between a reference point and an object using a continuous measurement beam, a continuous reference beam, an intensity...
5696516 Radar system and accurate method of range resolution  
In accordance with the teachings of the present invention, a radar system (20) and method of determining the range (R) to a remote target (14) is provided. The method includes computing a...
5684489 Position-finding apparatus for locating a vehicle travelling along means for propagating electromagnetic waves  
The present invention relates to apparatus for locating a vehicle V travelling along propagation means P. An object of the apparatus of the invention is to determine the position of the vehicle V,...
5680143 Method and apparatus for a low complexity satellite ranging system using Gaussian noise overlay  
A ranging system for a communications spacecraft (14) overlays a Gaussian noise signal over a broadband channel which also carries information or traffic signals. The noise is used to establish...
5668739 System and method for tracking objects using a detection system  
A system and method of tracking objects first receives returns from objects in the field of view of a detector. The sensor generates a current frame of datapoints, where an object in the field of...
5654890 High resolution autonomous precision approach and landing system  
An aircraft including an approach and landing system, including a navigation unit for providing navigation information, a weather radar unit for providing radar information, a processor which...
5559516 Dual cancellation interferometric AMTI radar  
An AMTI radar employs a dual cancellation format to cancel the clutter in the radar returns received by the apertures of an interferometric radar antenna. The three-aperture antenna presents the...
5559515 Channel switching interferometric AMTI radar  
An AMTI radar system utilizes a three-aperture interferometric antenna having substantially identical beamwidths on each of the three receiving channels. A switching network connected to first the...
5504489 Method for range determination  
A method for determination of positions of measurement objects from a number of measurements of the directions to the measurement objects made at separate points in time. During the initial...
5504490 Radar method and device for the measurement of distance  
Disclosed is a method for the measurement, by means of a radar, of the distance from a useful obstacle that is surrounded by parasitic obstacles but sends back an echo which is more powerful than...
5401026 Method and apparatus for determining parameters of the motion of an object  
The present invention provides a method and apparatus for determining a desired parameter of the motion of an object. In one embodiment, the device can be used to calculate the estimated carry...
5381444 Radio environment measuring system  
A radio environment measuring system for measuring a propagation state of radio waves includes: a fixed radio apparatus provided in a base station; a mobile radio apparatus operatively connected...
5349520 Apparatus for surveying and marking highways  
An apparatus for collecting, processing and storing data related to the physical features of a highway is carried in one or two vehicles traveling over the highway to be surveyed. A computer in a...
5311271 Golf course range finder  
A range finder for use on a golf course comprising a transceiver and a target. The transceiver emits a transmit beam along a transmission axis which is received by the target, and the target...
5298905 Visible light detection and ranging apparatus and method  
A lidar apparatus for detecting an object. The lidar apparatus includes a laser providing a visible light output signal over a first field of view and a photodiode having a second field of view....
5293160 Keyless vehicle lock system with distance measuring  
A keyless lock system for a vehicle includes a card for transmitting a radio signal, at least one onboard antenna for receiving the radio signal, and a control unit for allowing and preventing...
5247296 Device for determination of distances between close-range objects  
Device for determining distances in the close range (under 100 m), hereby characterized in that both light pulses and high-frequency pulses are transmitted and received and the correct distance is...
5157389 Keyless vehicle lock system  
A keyless lock system for a vehicle includes a card for transmitting a radio signal, at least one onboard antenna for receiving the radio signal, and a control unit for allowing and preventing...
5148178 Precision ranging system  
The range (R) to a target (12) is precisely determined by controlling the amplitude of the carrier before modulation using a feedback signal derived from the detected return. The amplitude of the...
5107261 Passive ranging system for radiosondes  
A passive ranging system for determining the slant range from a ground station to a drifting radiosonde. In one embodiment, the ground station receives meteorological data ranging and internal...
5053776 Device and method for the telemetric measurement of a distance and application to a radar probe for determining the topographic map of the loading surface of a shaft furnace  
The device includes a transmitting antenna which also serves as a receiving antenna and a separate receiving antenna for receiving the signals transmitted by the transmitting antenna and reflected...
5025260 Measuring system  
The invention relates to a measuring system having a measuring array comprising a transmission and reception section and an electronic evaluation unit. In accordance with the invention, the...
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...
4905009 Distance measuring device  
A distance measuring device transmits a continuous alternating wave from a wave source to a target which reflects it back toward the device. The wave source is activated until such time that a...
4829305 Medium distance measurement system and method  
A system and method are disclosed for measuring medium range distances, of about 1-10 meters, to a target. A transmission signal is reflected off the target, with the phase difference between the...
4736312 Arrangement for the determination of movement sequences in running disciplines  
A system with pressure sensors (5, 12), transmitters (8, 16, 18) and receivers (10, 21) provided in running shoes (2, 3) that upon the shoes (2, 3) leaving or contacting the ground (14) emit...
4730190 Hand-held measuring device  
A hand-held, portable, simple to use, low-cost yet accurate measurement device for measuring distances and calculating areas and volumes. The device comprises a microprocessor-controlled...
4507658 Narrow beam radar installation for turbine monitoring  
A millimeter wave radar mounted on a turbine installation for monitoring turbine blade vibration. The waveguide conducts signals from a millimeter wave radar unit outside of the turbine and...
4468959 Method and apparatus for tallying pipe  
Tubular goods, such as drill pipe and production tubing, are measured while going into and coming out of a borehole. An electronic beam is directed from a transmitter and is detected by a distance...
4413519 Turbine blade vibration detection apparatus  
Turbine blade vibration detection apparatus having two or more extremely narrow beam radar sensors positioned to direct their radar signals towards predetermined blade row or rows. A blade...
3940767 Electronic radome-error compensation system  
1. In a radar-controlled system including a radome-covered antenna adapted to receive a radar beam and to develop direction signals in accordance with the direction of said received beam, and an...
3908190 Analog to logical system for range measurements incorporating a radar  
A range-finding proximity detector wherein the Doppler or standing wave rr feeds two threshold flip-flops which are tripped for predetermined different triggering threshold voltage values so as to...
3757330 MICROWAVE INTERFEROMETERS  
This invention involves an interferometer arranged to measure the distance to a movable object. The interferometer includes a main wave guide for radiating electromagnetic waves towards the object...