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EP0251387A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Radar apparatus for measuring the distance to a surface

Assignee: Thales SA
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Filing: 1987-06-17
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Granted: —
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Expires: 2007-06-17
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Abstract

Abstract Translated from French Ce dispositif radar pour mesurer la distance "h" qui le sépare d'une surface (2) comporte des moyens d'émission (5) pour émettre vers ladite surface une onde modulée en fré­quence E(t) élaborée par un oscillateur (14) muni d'une com­mande en fréquence, des moyens de réception (7) pour recevoir cette onde réfléchie R(t) par ladite surface, un circuit mé­langeur (40) pour fournir une onde de battement entre l'onde émise et l'onde reçue et un circuit de traitement (20) compor­tant un circuit de numérisation (25) de l'onde de battement et un opérateur de transformation temporelle-fréquentielle (27) pour fournir des composantes fréquentielles à partir desquel­les est établie la distance "h". Ce circuit de traitement (20) comporte, en outre, un opérateur d'autocorrélation (31) pour effectuer une autocorrélation de l'onde de battement numérisée par le circuit (25) et aussi des moyens de traitement de spec­tre (32) pour déterminer finalement la distance "h". This radar device for measuring the distance "h" which separates it from a surface (2) comprises transmission means (5) for transmitting towards said surface a wave modulated in frequency E (t) produced by an oscillator (14) provided with a frequency control, reception means (7) for receiving this reflected wave R (t) by said surface, a mixer circuit (40) for supplying a beat wave between the transmitted wave and the received wave and a processing circuit (20) comprising a digitizing circuit (25) of the beat wave and a time-frequency transformation operator (27) for supplying frequency components from which the distance "h" is established. This processing circuit (20) further comprises an autocorrelation operator (31) for performing an autocorrelation of the beat wave digitized by the circuit (25) and also spectrum processing means (32) for determining finally the distance "h".

Inventors

  • 👤 Hugues Société Civile S.P.I.D. Crepin
  • 👤 Serge Société Civile S.P.I.D. Hethuin

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 16:22
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/343

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

GB2083312A Cited
FR2552905A1 Cited
EP0149939A1 Cited
FR2574280A1 Cited

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