Patent ID: 11893885
Assignee: NATIONAL CENTRAL UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A system for parking detection and identification of moveable apparatus, comprising:
a data processing unit;
a magnetic field generator disposed in said moveable apparatus, wherein said magnetic field generator is used for generating a magnetic field signal, wherein an unique identifier for identifying said moveable apparatus is Morse-code encoded in said magnetic field signal; and
a magnetic field sensing apparatus disposed in a moveable apparatus parking place or a peripheral area of said moveable apparatus parking place, wherein said magnetic field sensing apparatus includes a first magnetic field sensor and a second magnetic field sensor for measuring magnetic field respectively, wherein (a) 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, said data processing unit calculates a magnetic field measurement difference for obtaining said unique identifier via Morse-code decoding from said magnetic field measurement difference, 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) a magnetic field measurement is measured by one of said first magnetic field sensor and said second magnetic field sensor, said data processing unit obtains 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.