Radar apparatus
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorMasaru Ogawa
Life of this patent
Estimating the term…
Abstract
A radar apparatus in which a VCO sequentially outputs while switching a signal of a first frequency f1 and a signal of a second frequency f2 at a predetermined timing, a transmitting antenna radiates the signal, a receiving antenna receives a reflected wave obtained from the radiated signal being reflected off a measuring object, a beat signal as a difference in frequency between the signal that is currently being radiated by the transmitting antenna and the received reflected wave is detected at a mixer and a bandpass filter, and the distance to the measuring object is measured from the beat signal.
Claims8
A radar apparatus comprising:
- a signal generator for sequentially outputting while switching at a predetermined timing at least a signal of a first frequency and a signal of a second frequency;
- a radiation device for radiating said signal;
- and
- a detector for receiving a reflected wave obtained from the radiated signal reflecting off a measuring object and for detecting a beat signal as a difference in frequency between the signal currently being output by said signal generator and the received reflected wave;
- the radar apparatus for measuring the distance to the measuring object from the detected beat signal.
A distance measurement method which comprises:
- sequentially outputting while switching at a predetermined timing at least a signal of a first frequency and a signal of a second frequency;
- radiating said signal;
- receiving a reflected wave obtained from the radiated signal reflecting off a measuring object;
- detecting a beat signal as a difference in frequency between the signal currently being output and the received reflected wave;
- and
- measuring the distance to the measuring object from the detected beat signal.
Dependencies are inferred from the claim text.