| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Radar equipment | JP2017684 | 1984-02-07 | JPS60164276A | 1985-08-27 | IIJIMA NOBUYUKI |
| PURPOSE:To enable a stable tracking regardless of the mixing of any jamming wave by detecting the mixing of a jamming wave through comparison between the target video amplitude value at the center of a tracking gate and those at other positions to control the gate timing according to the results. CONSTITUTION:A gate circuit 8 multiplies a radar echo signal by a tracking gate signal to extract a gated video signal, which is inputted into the subsequent control circuit 20 through an A/D circuit. The control circuit 20 is made up of circuits 10-12 for calculating the area for portions of the gated video signal, a selector 17, a discrimination circuit 6 and the like and has a function of detecting the mixing of jamming waves into the gate signal and a function of detecting discrimination errors separately from the area of the first and second half of the video signal and the area thereof a quarter from the front end thereof at a tracking gate. Without the mixing of jamming waves, the selector 17 selects the former signal. But with the mixing of jamming waves, it selects the latter signal to shift the gate generation timing of a gate generation circuit 7 from the center of the video signal to the position a quarter from the front end thereof. | ||||||
| 162 | Radar equipment | JP19586383 | 1983-10-19 | JPS6088380A | 1985-05-18 | IIJIMA NOBUYUKI |
| PURPOSE:To stabilize the tracking of a target, by linearizing discriminating characteristics by determining the areal center position of a target video signal from a memory address to make the inclination of characteristics regardless of the size of the target. CONSTITUTION:A gated digital target signal is stored in a memory circuit 10. Subsequently, an area calculating circuit 11 successively accesses the circuit 10 and adds to calculate a total target video area and halves the same through an 1/2 scaler 12 to hold the same to a register 13. Succeedingly, the circuit 11 reads the circuit in the order of an address to compare an intermediate result A and the content B of the register 13 and an area is calculated to hold a corresponding non-satisfied address until a condition of result A>=content B is satisfied. Similarly, when a similar address to the reverse order of the address of the circuit 10 is held, discriminating characteristics become linear and the inclination of characteristics becomes constant regardless of the size of the target and stable tracking of the target is performed by a front 1/2 register 15 and a rear 1/2 register 16 and a discriminating circuit 6. | ||||||
| 163 | Airborne radar equipment | JP16166183 | 1983-09-02 | JPS6053867A | 1985-03-27 | KONDOU NATSUKI |
| PURPOSE:To prevent the interruption of distance tracking based on the coincidence of a underneath clutter and a target signal, by changing over PRF corresponding to the distance of a target and the altitude of an airplane. CONSTITUTION:The output of a receiver 4 is inputted to a distance tracking circuit 5 and the apparent range delay time T of a target is continuously detected by the circuit 5 while the distance of the target calculated from the real range delay time of the target is sent out to a PRF change-over device 6. The change- over device 6 calculates the tolerant range of a PRF value such that the target signal is not timewise coincided with a underneath clutter according to formulae I , II by using the distance R of the target and the altitude H of an airplane continuously inputted at every minute time intervals and issues a transmission order in PRF satisfying said tolerant range to a transmitter 1. In the formulae I , II, Fp is a PRF value, tau is a transmission pulse amplitude, TC is the expanse on the time axis of the reflected signal from the earth's surface or the surface of the sea present directly under an airplane, C is the velocity of light and N and M is an integer. | ||||||
| 164 | Radar equipment | JP6401783 | 1983-04-12 | JPS59188581A | 1984-10-25 | SUZUKI MICHINORI; HAYAKAWA HIDEO |
| PURPOSE:To perform accurate and stable range tracking by controlling the width of a range gate signal and compensating the variation in error detection sensitivity due to difference in target condition. CONSTITUTION:A gate width controller 7 identifies the variation in video width on the basis of an antenna elevation angle signal, airframe pitchsignal, etc., to increase or decrease the width of the range gate signal from a range gate signal generator 4. Consequently, erroneous detection sensitivity due to difference in target condition is compensated to perform the accurate and stable range tracking under the feedback control by a range gate device 5, error detector 6, range signal generator 3, etc. | ||||||
| 165 | Pulse width discrimination system | JP18505281 | 1981-11-18 | JPS5886473A | 1983-05-24 | YAMANE HIDEO |
| PURPOSE:To reduce the influence of an external disturbing wave by properly setting gate pulse widths of three kind of gate circuits and threshold values of two kind of comparing circuits. CONSTITUTION:A reflected signal received by an antenna 1 is inputted through a duplexer 2 to a receiver 5 and supplied from a detector 6 to a distance tracking circuit 7 as a pulse signal. Further, a gate pulse generating circuit 8 generates three kind of pulses which have centers coincident with the center of the pulse signal to be tracked and differ in pulse width, and those pulse are applied to gate circuits A-9, B-10, and C-11. Those gate circuits allow signals to pass for times corresponding to the pulse widths of the applied gate pulses. Comparing circuits find the ratio of the signals passed through the two gate circuits then output signals when said found value exceeds prescribed value. One of two comparing circuits outputs a signal, an OR circuit 14 sends a signal to a distance tracking circuit 7 to stop tracking, and researching is performed. | ||||||
| 166 | Target tracking apparatus | JP2932580 | 1980-03-07 | JPS56125679A | 1981-10-02 | HONMA KUNIHIKO |
| PURPOSE:To acquire a ture target continuously by automatically detecting radio jamming etc. that try to jam a distance tracking system and transfering a target detecting gate with respect to these. CONSTITUTION:Whether tracking was made for an artificial target or not is decided by the change in the target speed detected with a target distance change rate calculating part 17. When a decision circuit 22 detects the acceleration exceeding the maximum acceleration in the distance direction that an ordinary target can take, it outputs positive or negative detection signals 28, 29. If there are these outputs, the true target signal left by the distance gate is detected with a gate circuit 18 or 19 and when coincide these detection signals 25, 26 with acceleration detection signals 28, 29, the distance tracking gate position is instantaneously moved to the position of the target detection gate 23 or 24, whereby the true target is automatically retracked. | ||||||
| 167 | JPS513636B1 - | JP6978271 | 1971-09-10 | JPS513636B1 | 1976-02-04 | |
| 168 | JPS5020836B1 - | JP3484670 | 1970-04-24 | JPS5020836B1 | 1975-07-17 | |
| 169 | JPS48101093A - | JP2303373 | 1973-02-26 | JPS48101093A | 1973-12-20 | |
| 170 | JPS4884584A - | JP941173 | 1973-01-22 | JPS4884584A | 1973-11-09 | |
| 171 | ROAD CLUTTER MITIGATION | US15450532 | 2017-03-06 | US20180252803A1 | 2018-09-06 | Igal Bilik; Shahar Villeval; Shmuel Nedjar; Alexander Pokrass |
| A method and radar system and vehicle that tracks an object is disclosed. A source signal is transmitted into a volume that includes the object. A reflected signal is received from the volume in response to the source signal. The reflected signal includes a reflection of the source signal from the object. A range is determined for the object from the reflected signal. A ground signal is estimated at the determined range and an amount of the ground signal in the reflected signal is estimated. The object is selected for tracking based on the estimate of the amount of the ground signal in the reflection from the object. | ||||||
| 172 | Apparatus for detecting creeping of radar waves | US14490848 | 2014-09-19 | US09638788B2 | 2017-05-02 | Toyohito Nozawa; Tatsuya Namikiri |
| An apparatus that detects creeping of radar waves includes: a transmitter transmitting radar waves; a receiver receiving incoming waves from a target; a distance detecting unit detecting a first distance which is a distance up to the target; a speed derivation unit deriving a relative speed relative to the target; a distance estimating unit estimating, based on the relative speed, a second distance which is a distance up to the target; and a creeping detecting unit determining whether or not a creeping has occurred in accordance with whether or not the differential distance representing a deviation quantity between the first distance and the second distance is larger than or equal to a predetermined threshold. | ||||||
| 173 | Interferometric Doppler Radar and Method for Wave and Water Level Measurement | US15000776 | 2016-01-19 | US20160209260A1 | 2016-07-21 | Jennifer A. Rice; Changzhi Li; Changzhan Gu; Justin R. Davis |
| Devices, methods and systems for wave and water level measurement using a single DC (direct current)-coupled CW (continuous wave) Doppler radar for detecting water elevation changes in time when installed up to several meters from the water surface. The radar is wireless and can stream continuous data to a local PC (personal computer) or base station in range of its radio. The radar can sample up to 40 Hz and can run on batteries for continuous sampling. The radars can include multiple radar configurations of 1, 2 and 4 radar configurations. Applications for this radar can include the measurement of beach run-up, free surface elevation in tidal zones, and storm surge elevations near bridges and critical infrastructure during storm events. | ||||||
| 174 | Filling level measurement device and method for determining a functional relationship between different tracks | US13651668 | 2012-10-15 | US20130096851A1 | 2013-04-18 | Christian HOFERER; Roland WELLE |
| The parameters are calculated of a target function which describes the relationship of the positions of two different tracks. Using this target function, the position of another track can then be derived from the position of one track. | ||||||
| 175 | DOPPLER BEAM-SHARPENED RADAR ALTIMETER | US12476682 | 2009-06-02 | US20100302088A1 | 2010-12-02 | Benjamin J. Winstead; Thomas W. Heidemann |
| Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of the return signal. Spectral analysis is performed on the first component of the return signal to generate a plurality of frequency bins, wherein each frequency bin is centered around a different frequency across a Doppler shift frequency spectrum for the first component of the return signal. The method further comprises tracking the first component of the return signal, selecting a first frequency bin of the plurality of frequency bins based on the Doppler shift frequency of the first component of the return signal, and outputting a portion of the first component of the return signal falling within the first frequency bin for further processing. | ||||||
| 176 | Methods and apparatus for conversion of radar return data | US10657883 | 2003-09-09 | US06894640B1 | 2005-05-17 | James R. Hager; Jens M. Henrickson; Lavell Jordan; Curtis J. Petrich |
| An in-phase/quadrature component (IQ) mixer is configured to reject returns from a negative doppler shift swath in order to mitigate corruption of returns of a positive doppler shift swath. The mixer includes a sample delay element which produces a quadrature component from the in-phase component of an input signal. Further included are a plurality of mixer elements, a plurality of low pass filters, a plurality of decimators, and a plurality of all pass filters which act upon both the in-phase and quadrature components of the input signal. Also, a subtraction element is included which is configured to subtract the filtered and down sampled quadrature component from the filtered and down sampled in-phase component. | ||||||
| 177 | Methods and apparatus for determining an interferometric angle to a target in body coordinates | US10144873 | 2002-05-13 | US06856279B2 | 2005-02-15 | James R. Hager; Lavell Jordan; Todd R. Burlet |
| A method for processing radar return data to determine a physical angle, in aircraft body coordinates to a target, is disclosed. The radar return data includes a phase difference between radar return data received at an ambiguous radar channel and a left radar channel, a phase difference between radar return data received at a right radar channel and an ambiguous radar channel, and a phase difference between radar return data received at a right radar channel and a left radar channel. The method includes adjusting a phase bias for the three phase differences, resolving phase ambiguities between the three phase differences to provide a signal, and filtering the signal to provide a physical angle to the target in aircraft body coordinates. | ||||||
| 178 | Methods and apparatus for terrain correlation | US10144877 | 2002-05-13 | US06803878B2 | 2004-10-12 | James R. Hager; James B. Oven; Jason I. Formo |
| A method for testing radar system performance is disclosed which utilizes radar data test points in a radar data file. The method includes interpolating GPS data from a flight test to provide a GPS data point for every radar data test point, generating body coordinate values for every point in a corresponding digital elevation map (DEM) file using the interpolated GPS data, and applying a bounding function around at least a portion of the body coordinate values generated from the DEM file at a given time. The method also includes determining which body coordinate value generated from the DEM file is closest a current GPS data point for the given time and comparing the determined body coordinate value to the radar data test points at the given time. | ||||||
| 179 | Methods and apparatus for conversion of radar return data | US10144744 | 2002-05-13 | US06734820B2 | 2004-05-11 | James R. Hager; Jens M. Henrickson; Lavell Jordan; Curtis J. Petrich |
| An in-phase/quadrature component (IQ) mixer is configured to reject returns from a negative doppler shift swath in order to mitigate corruption of returns of a positive doppler shift swath. The mixer includes a sample delay element which produces a quadrature component from the in-phase component of an input signal. Further included are a plurality of mixer elements, a plurality of low pass filters, a plurality of decimators, and a plurality of all pass filters which act upon both the in-phase and quadrature components of the input signal. Also, a subtraction element is included which is configured to subtract the filtered and down sampled quadrature component from the filtered and down sampled in-phase component. | ||||||
| 180 | Methods and apparatus for minimum computation phase demodulation | US10144871 | 2002-05-13 | US06674397B2 | 2004-01-06 | James R. Hager; Lavell Jordan; Todd R. Burlet; Curtis J. Petrich |
| 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 also calculates past filter outputs based on filter outputs generated during previous non-zero gated radar return samples. | ||||||
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