US 12,455,360 B2
Object detector
Shinichi Sasaki, Nagaokakyo (JP); Takaaki Asada, Nagaokakyo (JP); and Yuuma Watabe, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jun. 20, 2024, as Appl. No. 18/749,159.
Application 18/749,159 is a continuation of application No. PCT/JP2022/027044, filed on Jul. 8, 2022.
Claims priority of application No. 2021-209481 (JP), filed on Dec. 23, 2021.
Prior Publication US 2024/0337739 A1, Oct. 10, 2024
Int. Cl. G01S 7/54 (2006.01); G01S 7/527 (2006.01); G01S 7/536 (2006.01); G01S 15/04 (2006.01)
CPC G01S 7/54 (2013.01) [G01S 7/527 (2013.01); G01S 7/536 (2013.01); G01S 15/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An object detector capable of detecting an object through transmission and reception of sound waves, the object detector comprising:
a wave transmitter to transmit a modulated wave in a predetermined frequency range to an object;
a first wave receiver to receive sound waves and to generate a first wave reception signal indicative of reception of the sound waves;
a second wave receiver to receive sound waves and to generate a second wave reception signal indicative of reception of the sound waves, the second wave receiver being located farther from the wave transmitter than the first wave receiver;
an adder to generate a third wave reception signal by adding the first wave reception signal and the second wave reception signal; and
a controller to detect the object based on the third wave reception signal by causing the wave transmitter to transmit the modulated wave; wherein
with the first and second wave receivers being arranged in a predetermined layout, a fluctuation range of the third wave reception signal generated upon receipt of the modulated wave from the wave transmitter is not more than a fluctuation range of the first wave reception signal generated upon receipt of the modulated wave.