GB2229882A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
A system for recognising and identifying target objects.
Assignee: Siemens AG
•
Filing: 1985-07-08
•
Granted: —
•
Expires: 2005-07-08
Abstract
No abstract record available.
Inventors
- 👤 Ludgar Grage
- 👤 Wolfgang Kranz
- 👤 Gerhard Brumme
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 18:15
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/50; G01S7/00; G01S7/48; G01S7/4802
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A radar system for the recognition and identification of target objects, in which a laser sensor comprises a laser transmitter and an optical superheterodyne receiver, a demodulator being arranged at the output of the optical receiver, with automatic matching to the Doppler frequency shift governed by the speed of the target object, and an analysis circuit for the formation of a recognition or identification result from the demodulated signals based on the time or frequency range thereof in comparison with patterns of known target objects held available in a store.
Claim 2
Dependent Claim
90 words
A radar system for the recognition and identification of target objects, in which a laser sensor comprises a laser transmitter and an optical superheterodyne receiver, a demodulator being arranged at the output of the optical receiver, with automatic matching to the Doppler frequency shift governed by the speed of the target object, and an analysis circuit for the formation of a recognition or identification result from the demodulated signals based on the time or frequency range thereof in comparison with patterns of known target objects held available in a store.
Claim 3
Dependent Claim
47 words
A system as claimed in Claim 1, in which the Doppler echo signal formed from the sum of all the vibration oscillations on the surface of the target object falling within the illumination range of the laser beam is analysed via the superheterodyne receiver and analysis circuit.
Claim 4
Dependent Claim
19 words
A system as claimed in Claim 1 or Claim 2, in which the demodulator is designed as a PLL-circuit.
Claim 5
Independent Claim
29 words
A system as claimed in any preceding Claim, in which the local oscillator has a high frequency stability for the production of the intermediate frequency in the superheterodyne receiver.
Claim 6
Independent Claim
20 words
A system as claimed in any preceding Claim, in which the transmitter of the laser sensor operates as a CW-laser.
Claim 7
Independent Claim
24 words
A system as claimed in any one of Claims 1 to 4, in which the transmitter of the laser sensor is a pulsed transmitter.
Claim 8
Independent Claim
19 words
A system as claimed in any preceding Claim, in which the transmitter is designed as a CO2 gas laser.
Claim 9
Independent Claim
29 words
A system as claimed in any preceding Claim, in which the frequency shift of the laser frequency by the intermediate frequency is effected by means of an acoustooptical modulator.
Claim 10
Independent Claim
27 words
A system as claimed in any preceding Claim, in which the identification of the target object takes place by time range correlation with patterns of known targets.
Claim 11
Independent Claim
36 words
A system as claimed in any preceding Claim, in which the demodulated signal oscillations are converted by a fast
Fourier-processor into the spectral range, whereupon frequency range correlation with patterns of known target objects is effected.
Claim 12
Dependent Claim
40 words
A system as claimed in Claim 10, in which the demodulator is followed by a first fast-Fourier processor, a logarithmicconverter circuit, and a second fast-Fourier processor whose output spectrum is analysed by correlation with known patterns for purposes of identification.
Claim 13
Dependent Claim
34 words
A radar system for the recognition and identification of target objects, substantially as described with reference to Figures 1 to 4, or as modified with reference to any one of
Figures 5 to 7.
Claim 14
Dependent Claim
34 words
A radar system for the recognition and identification of target objects, substantially as described with reference to Figures 1 to 4, or as modified with reference to any one of
Figures 5 to 7.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.