US 12,078,758 B2
Ranging module device and method thereof
Hikaru Sasaki, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Mar. 3, 2021, as Appl. No. 17/190,837.
Claims priority of application No. 2020-045191 (JP), filed on Mar. 16, 2020.
Prior Publication US 2021/0286054 A1, Sep. 16, 2021
Int. Cl. G01S 7/48 (2006.01); G01S 7/481 (2006.01); G01S 7/4913 (2020.01); G01S 7/4915 (2020.01); G01S 7/497 (2006.01); G01S 17/06 (2006.01)
CPC G01S 7/4817 (2013.01) [G01S 7/4913 (2013.01); G01S 7/4915 (2013.01); G01S 7/4972 (2013.01); G01S 17/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A device comprising:
a signal transmitter unit which transmits electromagnetic waves;
a scanner unit which scans the electromagnetic wave transmitted by the signal transmitter unit into space to create a projected electromagnetic wave;
a signal receiver unit which receives reflected electromagnetic waves from an object and outputs a received signal; and
a signal processor unit which calculates a distance to the object based on a received signal of the signal receiver unit, wherein
the signal receiver unit includes:
a first receiver unit which is designed to receive reflected electromagnetic waves created by a main lobe and two grating lobes of the projected electromagnetic wave;
a second receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and one grating lobe of the projected electromagnetic wave; and
a third receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and the other grating lobe of the projected electromagnetic wave, wherein
the signal processor unit determines that which one of the reflected electromagnetic waves created by the main lobe or the one grating lobe or the other grating lobe of the projected electromagnetic wave corresponds to the electromagnetic wave received by the signal receiver unit based on combinations of the received signals of the first receiver unit, the second receiver unit, and the third receiver unit, and calculates a distance to the object.