US 12,228,660 B2
Position measuring device
Kyung Hyun Ryu, Cheonan-si (KR); Seung Yeob Yi, Cheonan-si (KR); Hyung Il Baek, Cheonan-si (KR); Jae Il Park, Cheonan-si (KR); and Chan Woo Lee, Cheonan-si (KR)
Assigned to AMOSENSE CO., LTD, Cheonan-si (KR)
Appl. No. 17/606,278
Filed by AMOSENSE CO., LTD, Cheonan-si (KR)
PCT Filed Apr. 24, 2020, PCT No. PCT/KR2020/005463
§ 371(c)(1), (2) Date Oct. 25, 2021,
PCT Pub. No. WO2020/218889, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 10-2019-0049345 (KR), filed on Apr. 26, 2019.
Prior Publication US 2022/0214419 A1, Jul. 7, 2022
Int. Cl. G01S 3/72 (2006.01); G01S 1/20 (2006.01); H01Q 5/25 (2015.01); H04W 4/02 (2018.01); H04W 4/40 (2018.01)
CPC G01S 3/72 (2013.01) [G01S 1/20 (2013.01); H01Q 5/25 (2015.01); H04W 4/023 (2013.01); H04W 4/40 (2018.02)] 13 Claims
OG exemplary drawing
 
1. A position measuring device comprising:
a communication transceiver configured to generate a positioning signal at a set time interval;
an impedance sensing circuit configured to sense an amount of impedance changed;
a plurality of diversity antennas configured to obtain and output the positioning signal generated by the communication transceiver, and to receive a response signal to the positioning signal; and
a microcontroller configured to measure a distance between the diversity antenna and an object based on the positioning signal and the response signal transmitted and received by the plurality of diversity antennas, respectively and to measure a distance to the object based on a distance measurement value between the plurality of diversity antennas and the object,
wherein the microcontroller compensates for the distance measured value based on the amount of impedance changed.