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6683561 Radar systems  
A coherent radar detection system (2) comprises a radar signal transmitter (4) and a correlation receiver (6). The transmitter (4) comprises a waveform generator which generates a signal at an...
6680686 Remote ionizing radiation detector  
A method and apparatus for the detection of radioactive material in an area is disclosed. The apparatus comprises a transmitter operatively arranged to transmit electromagnetic radiation, a...
6680691 Methods and apparatus for accurate phase detection  
A phase processor is disclosed which is configured to receive processed radar return data from a left radar channel, a right radar channel, and an ambiguous radar channel. The phase processor...
6680688 Measuring system and method for detecting object distance by transmitted media with different wave velocities  
A measuring system and method of detecting an object distance by transmission media with different wave velocities are described. The measuring system has a computer, a primary detector and a...
6680690 Power efficiency circuit  
A radar level gauge for measuring a level of a surface of a product in a tank having a two-wire process control loop, output circuitry coupled to the two-wire process control loop for setting in...
6674397 Methods and apparatus for minimum computation phase demodulation  
A filter, includes a first order band pass filter configured to process non-zero amplitude gated radar return samples and process a portion of received zero amplitude return samples. The filter...
6664918 Method and apparatus for identifying complex objects based on range readings from multiple sensors  
The invention is a method and apparatus for determining the shape and location of objects by trilateration based on the output of a plurality of range sensors. The range measurements from a...
6661370 Radar data processing apparatus and data processing method  
The invention detects a ghost occurring due to mispairing, reflections from a wall, or the like, and improves the ability of a radar to track targets when actual relative velocity changes by more...
6657583 Pulse radar apparatus  
The present invention provides a pulse radar apparatus which is capable of detecting properly an object and measuring a distance up to the object in a short distance even if a leakage signal is...
6653974 Method for clearly determining the intermediate frequency difference in a frequency-controlled radar system  
In a method for the determination of the unambiguous range for the measurement of the IF deviation in a frequency-regulated radar system, a frequency adjustment or tuning of the radar system is...
6621448 Non-contact radar system for reconstruction of scenes obscured under snow and similar material  
A system and method for imaging objects obscured by a covering layer of snow. The system preferably utilizes a continuous-wave radar generating short-wavelength radio-frequency (RF) signal...
6617996 Ground penetrating radar with audible output  
A ground penetrating radar system including a processor for generating audible output signals having discrete frequency components representative of the depth of buried targets. The amplitude of...
6618000 Method and device for controlling the distance from a vehicle to a preceding vehicle  
In a method and apparatus for controlling the distance of a vehicle to a vehicle traveling ahead, in which the distance and the relative velocity of the vehicle traveling ahead are measured and...
6614385 Police activity transponder utilizing a vehicle interface  
A police activity transponder utilizes data available through a vehicle on-board diagnostic system or a intelligent vehicle data bus to adjust the sensitivity of the police activity transponder to...
6614390 Method for generating and analyzing radar pulses as well as a radar sensor  
A continuous signal of a radio frequency source is connected to an antenna using at least one mixer to generate and analyze radar pulses. To generate a radar pulse, the at least one mixer is...
6606052 Method and apparatus for detecting multiple objects with frequency modulated continuous wave radar  
A method and an apparatus for multiple object detection by automotive FMCW radars provides distance and relative velocity information. A two chirp frequency sweep with small slope difference is...
6597309 Microwave pulse generator and pulse-echo ranging system  
A pulse-echo ranging system is described employing a microwave transducer head (100) providing an echo profile output signal which is largely compatible with receivers (204) and echo processing...
6597305 Hazard and target alerting for weather radar  
A system, method, and computer program product for alerting a flight crew of weather radar return data collected, yet not presently being displayed. The system includes a memory, a processor, and...
6593874 Radar for detecting the distance to a target  
In a radar, a frequency-modulated transmission signal whose frequency varies in time is generated. The gain-frequency characteristics of an IF signal which represents a beat signal between the...
6593873 Obstacle recognition system for automotive vehicle  
An obstacle recognition system for automotive vehicles is provided which is designed to recognize targets such as preceding vehicles to be tracked by a radar by grouping data elements derived...
6587073 Frequency-signal processing method  
A method for the processing of a frequency signal especially for utilization in the evaluation of a distance measurement by means of pulsed electromagnetic waves or of frequency-modulated...
6587187 Time measuring system and related distance measuring system  
A coarse measuring circuit measures an approximate measurement object time DU based on a first reference clock CK10. The approximate measurement object time represents a duration from a...
6580387 Finding the range to a moving object by means of an angle-only sensor  
A method for calculating the range to a moving object by way of a sensor that determines the angle of the object. The sensor and the object move relative to one another, and after one measurement...
6577238 RFID detection system  
A system 100 is disclosed for monitoring the position of one or more RFID tags 201. The system has a detector 301 incorporating circuitry 304 for detecting changes in the range of an RFID tag 201...
6577270 Radar transceiver  
A compact millimeter wave radar transceiver at low cost is provided wherein a direct current voltage applying circuit is coupled to a high frequency line to apply a fast pulse wave without losing...
6570526 Speedometer  
A device for measuring the speed reached and the distance covered by a moving user or object has a Doppler radar sensor that may be secured to the moving user or object and is made of a microwave...
6545633 Radar system having simultaneous monostatic and bistatic mode of operation  
A pulse doppler radar system simultaneously operating monostatically and bistatically. A pair of radar unit operate monostatically transmitting a radio frequency (RF) energy signal and receiving a...
6535161 Loop powered radar rangefinder  
A pulse-echo radar measures non-contact range while powered from a two-wire process control loop. A key improvement over prior loop-powered pulse-echo radar is the use of carrier-based emissions...
6535158 Kinematic analysis of conically scanned environmental properties  
A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the...
6525545 Frequency domain reflection measurement device  
A frequency domain measurement device multi-phase modulates an RF frequency signal with a broadband signal, such as a pseudo random number, to produce an RF spread spectrum signal that encompasses...
6522286 Multi-channel radar apparatus  
A multi-channel radar apparatuses optimizes the number of channels used for detecting a body in terms of position detection precision and processing time reduction. The multi-channel apparatus...
6522285 Ground-penetrating imaging and detecting radar  
A ground-penetrating radar comprises a single resonant microstrip patch antenna (RMPA) that is driven by a three-port directional coupler. A reflected-wave output port is buffered by a wideband...
6509864 Distance measuring device and method for calibrating a distance measuring device  
The invention relates to a distance measuring device. A transmitting part (E) for electromagnetic radiation especially radar radiation, emits measuring pulses (A, B) which are controlled by a...
6492938 Method of associating target data in a multi-slope FMCW radar system  
An association method for a multi-slope FMCW radar identifies candidate combinations of frequency components as being correctly or incorrectly associated based on calculated range-rate. Range and...
6492933 SSB pulse Doppler sensor and active reflector system  
A dual channel microwave sensor employs single sideband Doppler techniques in innumerable vibration, motion, and displacement applications. When combined with an active reflector, the sensor...
6492937 High precision range measurement technique  
Electronic Warfare (EW) systems aboard aircrafts are used to protect them from guided missile by denying threat radar systems the ability to track the aircrafts. In a typical operation, a threat...
6486826 Arrangement for the precise distance measuring, in particular the filling level measuring  
An arrangement for the precise measuring of the distance with a FMCW radar device having a frequency-variable digitally-actuated oscillator to generate a transmitting frequency which can be tuned...
6480142 Method and apparatus for measuring velocity and turbulence of atmospheric flows  
A method and apparatus for measuring the parameters of atmospheric turbulent flows utilizes the Doppler shifted frequencies of received radar signals backscattered from sound generated...
6476758 Flexible digital ranging system and method  
Systems and methods that may be used to determine the distance between an orbiting satellite and a ground station. A master clock divider circuit generates clock signals derived from a master...
6473028 Detection of the distance between an electromagnetic transponder and a terminal  
A method and apparatus for determining the distance separating an electromagnetic transponder from a terminal generating a magnetic field by a first oscillating circuit, the transponder including...
6469656 Method of detecting moving and/or stationary objects in the path of a vehicle  
A method is described for detecting moving and/or stationary objects in the path of a vehicle, where the distance and velocity of the reflecting object are determined by using a radar sensor,...
6466159 Target detection arrangement  
Radar apparatus in which output RF signals are modulated on an optical signal prior to transmission. Incoming optical echo signals are converted into RF signals using a detector. The original...
6462705 Spread spectrum radar clock  
A dither oscillator randomly modulates the instantaneous phase of a precision radar PRF oscillator. Radar spectral emission lines occurring at multiples of a transmit PRF oscillator are spread by...
6459402 Method for measuring distance and position using spectrum signal, and an equipment using the method  
Under a multi-path environment, the receive timing for an incoming wave of the minimum propagation delay time cannot be accurately measured in the prior art. By using the delay profile created by...
6448924 Microwave blade tracker  
Blade tracker apparatus for tracking rotating helicopter blades includes an antenna which transmits a signal beam in the direction of the rotating blade. The impedance of the antenna changes as...
6446909 Reciprocating chemical muscle(RCM) and method for using same  
A preferred apparatus for generating power from a non-combustive chemical reaction with the power being sufficient to enable motion of the apparatus includes a reaction chamber containing a...
6445336 Radar device and on-vehicle radar device  
A radar device in which a much more precise demodulation can be made with an inexpensive circuit, free of the output variation of the frequency-modulated transmission signal. The radar device...
6429806 Complex homodyned FSK diplex radar  
A complex frequency shift keyed homodyned diplexed radar system and method that can accurately determine the range of one or more targets where the targets have little or no velocity relative to...
6429801 Method and apparatus for precursor based radar  
A method and apparatus is described for signal processing to identify an object in an environment. A precursor associated with an electromagnetic wave interacting with the object is received and a...
6420994 Volume in space locator  
Methods and apparatus for determining location information corresponding to a volume in space (VIS) that is occupied by a selected target from a remote observation platform through the process of...