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Target object detection system

  • US 7,652,616 B2
  • Filed: 02/08/2005
  • Issued: 01/26/2010
  • Est. Priority Date: 02/08/2005
  • Status: Active Grant
First Claim
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1. A target object detection system for emitting, toward a target object, transmission signals as transmission waves, whose frequencies have been modulated successively into a plurality of stepped frequencies, and for receiving echoes of the transmission waves reflected from the target object, thereby to calculate a relative velocity of the target object by frequency-analyzing reception signals obtained from the echoes, the target object detection system comprising:

  • a frequency-modulation unit that successively executes, within a measurement time derived from a desired velocity resolution, a plurality of times iterated frequency-modulation processes, where each of the frequency-modulation processes successively modulates the transmission signals into the stepped frequencies; and

    a frequency-analysis unit that frequency-analyzes, within said measurement time, for each of the stepped frequencies, throughout the plurality of frequency-modulation processes those signals, among the reception signals, corresponding to the identical stepped frequency in the frequency-modulation processes,wherein said measurement time is a minimum frequency modulation period required for the desired velocity resolution.

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