US 11,893,885 B2
System and method for parking detection and identification of moveable apparatus
Chien-Chih Chen, Taoyuan (TW)
Assigned to NATIONAL CENTRAL UNIVERSITY, Taoyuan (TW)
Filed by National Central University, Taoyuan (TW)
Filed on Jun. 25, 2021, as Appl. No. 17/358,747.
Application 17/358,747 is a continuation in part of application No. 16/668,646, filed on Oct. 30, 2019.
Claims priority of provisional application 63/116,343, filed on Nov. 20, 2020.
Claims priority of application No. 108104269 (TW), filed on Feb. 1, 2019.
Prior Publication US 2021/0319693 A1, Oct. 14, 2021
Int. Cl. G01R 33/04 (2006.01); G01R 33/09 (2006.01); G08G 1/042 (2006.01); G01R 33/022 (2006.01); G01R 33/00 (2006.01)
CPC G08G 1/042 (2013.01) [G01R 33/0094 (2013.01); G01R 33/022 (2013.01); G01R 33/04 (2013.01); G01R 33/091 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for parking detection and identification of moveable apparatus, comprising following steps of:
generating a magnetic field signal by a magnetic field generator disposed in said moveable apparatus, wherein an unique identifier for identifying said moveable apparatus is Morse-code encoded in said magnetic field signal; and
measuring magnetic field by (a) a first magnetic field sensor and a second magnetic field sensor of a magnetic field sensing apparatus respectively and calculating a magnetic field measurement difference by a data processing unit for obtaining said unique identifier via Morse-code decoding from said magnetic field measurement difference, wherein said magnetic field sensing apparatus is disposed in a moveable apparatus parking place or a peripheral area of said moveable apparatus parking place, wherein a first magnetic field measurement and a second magnetic field measurement are measured by said first magnetic field sensor and said second magnetic field sensor respectively, wherein said magnetic field measurement difference is a magnitude of a difference of said first magnetic field measurement and said second magnetic field measurement, or a magnitude of a difference of a first magnetic field component of said first magnetic field measurement along a characteristic direction and a second magnetic field component of said second magnetic field measurement along said characteristic direction, or (b) one of a first magnetic field sensor and a second magnetic field sensor of a magnetic field sensing apparatus, a magnetic field measurement is measured, and obtaining said unique identifier via Morse-code decoding from said magnetic field measurement, or a magnetic field component of said magnetic field measurement along a characteristic direction by a data processing unit, wherein said magnetic field sensing apparatus is disposed in a moveable apparatus parking place or a peripheral area of said moveable apparatus parking place.