Abstract:
본 발명은 자기 공진 코일의 루프를 여러 개로 분리시켜 송/수신 공진코일이 놓여있는 곳의 자기장 발생을 증가시켜 커플링 계수를 증가시키며, 루프가 없는 부분의 자기장 발생을 최소화해 자계 공진 코일에서 전면적으로 발생하는 자기장을 줄여주고, 주파수 변동에 대한 전력전송효율의 신뢰도를 높일 수 있도록 광대역의 주파수 특성을 가지는 자계 공진 무선전력전송 시스템을 제공한다.
Abstract:
본 발명의 일면에 따른 자기 공진 무선전력전송 방법은, 소스 코일에서 전자기 유도 방식으로 송전부 공진 코일로 전력을 전달하는 단계, 상기 송전부 공진 코일에서 자기 공진 결합(coupling)에 따라 상기 송전부 공진 코일과 동일 공진 주파수를 가지는 수전부 공진 코일로 전력을 전달하는 단계 및 상기 수전부 공진 코일에서 전자기 유도 방식으로 전자기기의 디바이스 코일로 전력을 전달하는 단계를 포함하고, 상기 송전부 공진 코일과 상기 수전부 공진 코일은 서로 수직하게 또는 임의의 일정 각도로 기울어지게 배열된다.
Abstract:
PURPOSE: A wireless location measurement server using clock offset correction and a wireless location measurement method using the same are provided to minimize errors of a location estimate result by clock offset by measuring a relative clock frequency rate between beacons and compensating each beacon clock frequency. CONSTITUTION: Compensation pulse information including a clock count number of a first compensation pulse and a second compensation pulse is received from multiple beacons (200) which receive the first compensation pulse and the second compensation pulse from a step node. A relative clock frequency rate for clock offset compensation between the multiple beacons is calculated according to the beacon using a compensation pulse. The multiple beacons receive a location pulse from a tag of a location measurement target and receive location pulse information including the clock count number of the location pulse. A reception time point of the second compensation pulse in which the multiple beacons receive is synchronized with a same time point. Clock count information is calculated according to the beacon using the relative clock frequency rate corresponding to the synchronized time point. [Reference numerals] (1) Compensation pulse; (100) Compensation node; (3) Compensation pulse information packet; (300) Tag; (4) Location pulse; (400) Device (server); (5) Location pulse information packet
Abstract:
PURPOSE: A clock offset compensation method and an apparatus thereof are provided to minimize an error problem of a location estimation result due to clock offset by compensating a clock frequency of each beacon. CONSTITUTION: A compensation pulse information reception unit(410) receives compensation pulse information from beacons which receive a first compensation pulse and a second compensation pulse from a compensation node. The compensation pulse information includes a clock count number of the first compensation pulse and the second compensation pulse. A location pulse information reception unit(420) receives location pulse information from a plurality of beacons receiving a location pulse from a tag corresponding to a positioning target. A clock offset compensation unit(430) calculates a relative clock frequency ratio by beacon for clock offset compensation between beacons using the compensation pulse information. A clock count compensation unit(440) calculates compensated clock count information between a beacon and a tag by each beacon using the each clock count number and the each relative clock frequency ratio about the first compensation pulse, the second compensation pulse and the location pulse. [Reference numerals] (410) Compensation pulse information reception unit; (420) Location pulse information reception unit; (430) Clock offset compensation unit; (440) Clock count compensation unit