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1. (WO1999008128) RADAR DISTANCE MEASURING DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1999/008128 International Application No.: PCT/EP1998/004916
Publication Date: 18.02.1999 International Filing Date: 06.08.1998
Chapter 2 Demand Filed: 03.02.1999
IPC:
G01S 7/02 (2006.01) ,G01S 7/288 (2006.01) ,G01S 7/35 (2006.01) ,G01S 7/40 (2006.01) ,G01S 13/34 (2006.01)
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
02
of systems according to group G01S13/58
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
02
of systems according to group G01S13/58
28
Details of pulse systems
285
Receivers
288
Coherent receivers
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
02
of systems according to group G01S13/58
35
Details of non-pulse systems
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
02
of systems according to group G01S13/58
40
Means for monitoring or calibrating
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
02
Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
06
Systems determining position data of a target
08
Systems for measuring distance only
32
using transmission of continuous unmodulated waves, amplitude-, frequency- or phase-modulated waves
34
using transmission of frequency-modulated waves and the received signal, or a signal derived therefrom, being heterodyned with a locally-generated signal related to the contemporaneous transmitted signal to give a beat-frequency signal
Applicants:
HÖHNE, Felix [DE/DE]; DE (UsOnly)
MIKROWELLEN-TECHNOLOGIE UND SENSOREN GMBH [DE/DE]; Ludwik-Bölkow-Allee D-85521 Ottobrunn, DE (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, JP, LU, MC, NL, PT, SE)
Inventors:
HÖHNE, Felix; DE
Agent:
KNAUTHE PAUL SCHMITT; Herbert Kunz Prielmayerstr. 3 D-80335 München, DE
Priority Data:
197 34 713.411.08.1997DE
Title (EN) RADAR DISTANCE MEASURING DEVICE
(FR) DISPOSITIF PERMETTANT DE MESURER LA DISTANCE D'UN RADAR
(DE) RADAR-ENTFERNUNGSMESSEINRICHTUNG
Abstract:
(EN) The invention relates to a radar distance measuring device. An especially linear frequency-modulated high frequency signal is emitted via an antenna and mixed with an echo signal reflected by a target object whose distance is to be determined. The distance of said target object can then be calculated by analysing the frequency of the mix result. The aim of the invention is to improve the distance resolution or increase the accuracy of measurement. To this end, a first frequency analysis is first carried out to obtain a rough analysis result. Said rough analysis result is used to control a filtering device which then restricts the mix result in its time range to a segment around the frequency of the target object. A discrete Fourier transformation is then carried out for this segment in order to produce an analysis result with a more refined scanning step than the first frequency analysis. The measuring result is further refined, preferably by taking into account not only the frequency of the mix result as determined by the target object but also the phase relation of the oscillation of this frequency and by supplementing the measuring result with a corresponding wavelength fractional part.
(FR) L'invention concerne un dispositif permettant de mesurer la distance d'un radar, avec lequel notamment un signal haute fréquence linéaire modulé en fréquence est émis par l'intermédiaire d'une antenne et mélangé à un signal d'écho réfléchi par un objet cible dont la distance reste à déterminer. Pour calculer la distance de l'objet, on réalise une analyse de fréquences avec le résultat obtenu par ce mélange. Pour améliorer la définition de la distance ou la précision de la mesure, on calcule d'abord un résultat approximatif par une première analyse de fréquences, ce résultat approximatif servant à la commande d'un dispositif filtrant qui délimite dans le temps le résultat issu du mélange à une période englobant la fréquence de l'objet. On applique à cette période une transformation de Fourrier discrète pour obtenir un résultat d'analyse avec un niveau de détection affiné par rapport à celui de la première analyse de fréquences. Pour encore affiner le résultat de mesure, on considère, de préférence, non seulement la fréquence du résultat de mélange due à l'objet cible mais aussi la relation de phase de l'oscillation de cette fréquence, et le résultat de mesure est complété d'une fraction de longueur d'onde correspondante.
(DE) Bei einer Radar-Entfernungsmeßeinrichtung, bei welcher ein insbesondere linear frequenzmoduliertes Hochfrequenzsignal über eine Antenne ausgesendet und außerdem mit von einem in seiner Entfernung zu bestimmenden Zielobjekt reflektieren Echosignalen gemischt wird, um sodann durch Frequenzanalyse des Mischungsergebnisses die Zielobjektentfernung zu errechnen, wird eine Verbesserung der Entfernungsauflösung bzw. eine Erhöhung der Meßgenauigkeit dadurch erreicht, daß zunächst durch eine erste Frequenzanalyse ein Grob-Analyseergebnis erzeugt wird, das zur Steuerung einer Filtereinrichtung dient, die im Zeitbereich das Mischergebnis auf einen Abschnitt um die Zielobjektefrequenz begrenzt, über welchen hin eine Diskrete Fourier-Transformation zur Erzeugung eines Analyseergebnisses mit einem verfeinerten Abtastschritt gegenüber der ersten Frequenzanalyse durchgeführt wird. Eine weitere Verfeinerung des Meßergebnisses wird vorzugsweise dadurch erreicht, daß nicht nur die zielobjektbedingte Frequenz des Mischungsergebnisses, sondern auch die Phasenlage der Schwingung dieser Frequenz berücksichtigt und das Meßergebnis um einen entsprechenden Wellenlängenbruchteil ergänzt wird.
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Designated States: JP, US
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: German (DE)
Filing Language: German (DE)