US 12,264,958 B1
System and method for measuring load of vehicle using optimal resonant frequency search wireless power transmission system
Young Sun Kim, Gunpo-si (KR); Sung Han You, Seoul (KR); and Ji Young Song, Sejong-si (KR)
Assigned to BANF CO., LTD., Seoul (KR)
Appl. No. 18/845,866
Filed by BANF CO., LTD., Seoul (KR)
PCT Filed Jan. 25, 2023, PCT No. PCT/KR2023/001090
§ 371(c)(1), (2) Date Sep. 10, 2024,
PCT Pub. No. WO2023/182638, PCT Pub. Date Sep. 28, 2023.
Claims priority of application No. 10-2022-0035507 (KR), filed on Mar. 22, 2022.
Int. Cl. G01G 19/12 (2006.01); G01B 7/02 (2006.01); G01G 7/00 (2006.01); H02J 50/12 (2016.01)
CPC G01G 19/12 (2013.01) [G01G 7/00 (2013.01); H02J 50/12 (2016.02); G01B 7/023 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of measuring a load of a vehicle using an optimal resonant frequency search wireless power transmission system, in a method of measuring a load using a magnetic resonant wireless power transmission system that is installed in a vehicle having a vehicle height that varies according to the load of the vehicle including a loaded cargo, and is provided with a power transmission unit (Tx) and a power reception unit (Rx),
the method comprising:
(a) searching for an optimal resonant frequency according to a change in a power transmission distance using a system frequency variation according to a change in the load of the vehicle;
(b) deriving an optimal resonant frequency variation relationship according to the change in the power transmission distance; and
(c) calculating an amount of change in power transmission distance from the variation relationship, and deriving the load from the amount of change in power transmission distance.