US 12,259,469 B2
Object detection device
Yu Koyama, Nisshin (JP); Mitsuyasu Matsuura, Nisshin (JP); and Hideki Otsuka, Kariya (JP)
Assigned to SOKEN, INC., Nisshin (JP); and DENSO CORPORATION, Kariya (JP)
Filed by SOKEN, INC., Nisshin (JP); and DENSO CORPORATION, Kariya (JP)
Filed on Jun. 16, 2021, as Appl. No. 17/349,606.
Application 17/349,606 is a continuation of application No. PCT/JP2019/043680, filed on Nov. 7, 2019.
Claims priority of application No. 2018-236663 (JP), filed on Dec. 18, 2018.
Prior Publication US 2021/0311190 A1, Oct. 7, 2021
Int. Cl. G01S 15/931 (2020.01); G01S 7/523 (2006.01); G01S 15/10 (2006.01); G01S 15/58 (2006.01)
CPC G01S 15/931 (2013.01) [G01S 7/523 (2013.01); G01S 15/104 (2013.01); G01S 15/582 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An object detection device comprising:
a non-transitory memory storing one or more computer programs; and
a processor executing the one or more computer programs to:
output drive-signal setting information to generate a drive signal that drives a transceiver to output an ultrasonic wave as a search wave;
receive a received signal corresponding to a reflected wave that is received by the transceiver, the reflected wave corresponding to the search wave that is reflected; and
perform an object detection determination based on the received signal,
wherein
the drive signal has at least two frequencies, and
the processor is configured to, in performing the object detection determination:
extract at least two amplitudes corresponding to the at least two frequencies from the received signal,
determine a ratio of the at least two amplitudes,
perform a comparison that compares the ratio of the at least two amplitudes with a reference value, and
based on a result of the comparison, determine whether the object is in a predetermined detection range and/or determine a vertical height of the object.