SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND LIDAR DEVICE

WIPO Patent Application WO/2022/180761

A1

A signal processing device (15) is configured to calculate relative speeds of a plurality of observation objects present in a space with respect to the lidar device as moving speeds of the observation objects. A plurality of pulse beams different from each other in optical frequency are generated from laser beams emitted from a light source (1). The pulse beams are radiated in the space, are scattered by the observation objects, and are then received as scattered beams. Beams generated by combination of the scattered beams with the laser beams are detected. A signal processing device (15) comprises: a Doppler frequency calculation unit (16) that calculates, from the optical frequencies of the generated pulse beams and detection signals of the combined beams, Doppler frequencies which are caused in association with movement of the observation objects and are included in the optical frequencies of the scattered beams; and a speed calculation unit (17) that calculates the relative speeds of the observation objects from the Doppler frequencies calculated by the Doppler frequency calculation unit (16).

NOMURA JUNIA (JP)
IMAKI MASAHARU (JP)
KAMEYAMA SHUMPEI (JP)
ITO YUSUKE (JP)

PCT/JP2021/007241

September 01, 2022

February 26, 2021

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MITSUBISHI ELECTRIC CORP (JP)

G01S17/58

WO2020209279A1	2020-10-15
WO2016092705A1	2016-06-16
WO2020025984A1	2020-02-06
WO2020079776A1	2020-04-23

JP2011519424A

2011-07-07

"Laser Safety Guidebook", 2006, NEW TECHNOLOGY COMMUNICATIONS CO.
See also references of EP 4283338A4

SANNO PATENT ATTORNEYS OFFICE (JP)

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