US 12,013,459 B2
Distance measuring device, distance measuring system, distance measuring method, and program
Shigeru Saitou, Kyoto (JP); Motonori Ishii, Osaka (JP); Masato Takemoto, Osaka (JP); and Shinzo Koyama, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 16/981,587
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Mar. 6, 2019, PCT No. PCT/JP2019/008940
§ 371(c)(1), (2) Date Sep. 16, 2020,
PCT Pub. No. WO2019/181518, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 2018-053552 (JP), filed on Mar. 20, 2018.
Prior Publication US 2021/0033730 A1, Feb. 4, 2021
Int. Cl. G01S 17/10 (2020.01); G01S 7/481 (2006.01); G01S 7/486 (2020.01); G01S 7/487 (2006.01); G01S 17/18 (2020.01); G01S 17/89 (2020.01)
CPC G01S 17/10 (2013.01) [G01S 7/4816 (2013.01); G01S 7/4868 (2013.01); G01S 17/18 (2020.01); G01S 17/89 (2013.01); G01S 7/4873 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A distance measuring device to be connected to a wave transmitter configured to transmit a measuring wave and a wave receiver configured to receive the measuring wave that has been reflected from a target, the distance measuring device comprising
a distance measuring unit configured to calculate a distance to the target based on a time interval between transmission of the measuring wave from the wave transmitter and reception of the measuring wave at the wave receiver,
the distance measuring unit being configured to, when the target is present across a preceding distance range and a succeeding distance range which are continuous with each other and both of which belong to a plurality of distance ranges defined by dividing a measurable distance range, calculate the distance to the target based on an amount of a preceding wave received at the wave receiver and an amount of a succeeding wave received at the wave receiver, the amount of the preceding wave being energy integrated over a period corresponding to the preceding distance range, the amount of the succeeding wave being energy integrated over a period corresponding to the succeeding distance range,
the distance measuring unit being configured to calculate the distance to the target based on a ratio of the amount of the preceding wave and the amount of the succeeding wave.