Object recognition apparatus
First Claim
1. An object recognition apparatus comprising:
- an antenna that emits transmission beams toward a plurality of directions;
a receiving circuit that receives reflected signals of the transmission beams from predetermined directions;
a distance and direction calculation circuit which transforms the reflected signals to range direction patterns composed of beat frequencies between the transmission beams and the reflected signals and signal intensities at each beat frequency and calculates distance and direction to objects reflecting the transmission beams based on the range direction patterns;
an object pattern storage unit which stores range direction patterns of reflected signals obtained in advance with respect to predetermined objects;
an object recognition circuit which compares range direction patterns of the reflected signals received by the receiving circuit with respect to the predetermined directions, with the range direction patterns stored in the object pattern storage unit, and which recognize that a pair of reflected signals from two neighboring directions are signals reflected by the same object.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention relates to an object recognition apparatus. This apparatus comprises an antenna which emits transmission beams toward a plurality of directions; a receiving circuit which receives reflected signals of the transmission beams from predetermined directions; a distance and direction calculation circuit which calculates distance and direction to objects reflecting the transmission beams based on the transmission beams and the reflected signals; an object pattern storage unit which stores range direction patterns of reflected signals obtained in advance with respect to predetermined objects; an object recognition circuit which compares range direction patterns of the reflected signals received by the receiving circuit with respect to the predetermined directions, with the range direction patterns stored in the object pattern storage unit, and which recognize that a pair of reflected signals from two neighboring directions are signals reflected by the same object.
99 Citations
8 Claims
-
1. An object recognition apparatus comprising:
-
an antenna that emits transmission beams toward a plurality of directions;
a receiving circuit that receives reflected signals of the transmission beams from predetermined directions;
a distance and direction calculation circuit which transforms the reflected signals to range direction patterns composed of beat frequencies between the transmission beams and the reflected signals and signal intensities at each beat frequency and calculates distance and direction to objects reflecting the transmission beams based on the range direction patterns;
an object pattern storage unit which stores range direction patterns of reflected signals obtained in advance with respect to predetermined objects;
an object recognition circuit which compares range direction patterns of the reflected signals received by the receiving circuit with respect to the predetermined directions, with the range direction patterns stored in the object pattern storage unit, and which recognize that a pair of reflected signals from two neighboring directions are signals reflected by the same object. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An object recognition apparatus comprising:
-
antenna that emits transmission beams toward a plurality of directions;
receiving circuit that receives reflected signals of the transmission beams from predetermined directions;
distance and direction calculation circuit which calculates distance and direction to objects reflecting the transmission beams based on the transmission beams and the reflected signals;
frequency computing circuit this calculates frequency spectrums of the reflected signals from predetermined directions;
clustering processing circuit which compares with each other the frequency spectrums of the reflected signals obtained with respect to the predetermined directions, and which recognizes that reflected signals having similar frequency spectrums are signals reflected by the same object.
-
Specification