[특허]Location based services for RFID and sensor networks

Location based services for RFID and sensor networks 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/00 H04W-004/02 H04W-004/00
출원번호	US-0138179 (2016-04-25)
등록번호	US-9883337 (2018-01-30)
발명자 / 주소	Sadr, Ramin Carano, Bandel Louis
출원인 / 주소	Mijix, Inc.
대리인 / 주소	KPPB LLP
인용정보	피인용 횟수 : 0 인용 특허 : 103

초록 ▼

Systems and methods for generating sensor tag locations expressed in a three-dimension global coordinate system from sensor tag locations expressed in three-dimensional local coordinate systems of mobile readers that read each tag and for updating the paths of each mobile reader are disclosed. In one embodiment, a method includes receiving sensor data from one or more mobile reader agents, receiving tag location data that describes the location of one or more sensor tags expressed in local coordinates of the subspace of the mobile reader agent that read the sensor tag, converting the tag location data into a global coordinate system that is common to all mobile reader agents, and updating one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent.

대표청구항 ▼

1. A method for generating the location of one or more sensor tags expressed in a three-dimension global coordinate system from the location of the one or more sensor tags expressed in three-dimensional local coordinate systems of mobile reader agents that read each tag and for updating the paths of each mobile reader, the method comprising: receiving sensor data from one or more mobile reader agents;receiving tag location data that describes the location of one or more sensor tags, each location of a sensor tag expressed in local coordinates of the subspace of the mobile reader agent that read the sensor tag, wherein the tag, location data that describes the location of one or more sensor tags is expressed as a quaternion in the form: q=q0+q1i+q2j+q3k, where i, j, and k are imaginary numbers satisfying i2=j2=k2=ijk=−1 with conjugate q2=q0−q1i−q2j −q3k and |q|2=qqc;converting the tag location data into a three-dimensional global coordinate system that is common to all mobile reader agents; andupdating one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent. 2. The method of claim 1 wherein the sensor data comprises information from an accelerometer, a magnetometer, a gyroscope, and the position of an antenna that are on-board a mobile reader agent. 3. The method of claim 1 wherein the one or more mobile reader agents are configured to roam distinct non-overlapping subspaces within a read area. 4. The method of claim 1 further comprising receiving reference location data that is obtained from at least one anchor node, where the anchor node has a known location in global coordinates. 5. The method of claim 1 wherein control of the mobile reader agent is provided via proportional integral derivative (PID) control. 6. The method of claim 1 wherein updating one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent further comprises receiving obstacle data concerning agents and people in the read area. 7. The method of claim 1 wherein converting the tag location data into the three-dimensional global coordinate system that is common to all mobile reader agents comprises expressing the sensor data in quaternions and using quaternion algebra to rotate the matrix. 8. The method of claim 1 wherein updating the one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent comprises computing a path for a mobile reader agent around obstacles that are expressed in the form: xobsi={xεX|Ai(xi)∩0≠Ø} and xobsij={xεX|Ai(xi)∩Aj(xj)≠Ø} where xobs=(⋃i=1m⁢xobsi)⋃(⋃i≠ji,j⁢xobsij). 9. The method of claim 1 wherein converting the tag location data into a global coordinate system that is common to all mobile reader agents comprises rotating the quaternion using a rotation matrix that is expressed as: R⁡(q_)=[-q02+q12-q22-q322⁢(q1⁢q2-q0⁢q3)2⁢(q1⁢q3+q0⁢q2)2⁢(q1⁢q2+q0⁢q3)q02-q12+q22-q322⁢(q2⁢q3-q0⁢q1)2⁢(q1⁢q3-q0⁢q2)2⁢(q2⁢q3+q0⁢q1)q02-q12-q22+q32]. 10. A sensor tag reader and location system for generating the location of one or more sensor tags expressed in a three-dimension global coordinate system from the location of the one or more sensor tags expressed in three-dimensional local coordinate systems of mobile readers that read each tag and for updating the paths of each mobile reader, the system comprising: a processor; andmemory comprising an inventory and agent control application;wherein the processor is configured by the inventory and agent control application to: receive sensor data from one or more mobile reader agents;receive tag location data that describes the location of one or more sensor tags, each location of a sensor tag expressed in local coordinates of the subspace of the mobile reader agent that read the sensor tag, wherein the tag location data that describes the location of one or more sensor tags is expressed as a quaternion in the form: q=q0+q1i+q2j+q3k, where i, j, and k are imaginary numbers satisfying i2=j2=k2=ijk=−1 with conjugate q2=q0−q1i−q2j−q3k and |q|2=qqc;convert the tag location data into a three-dimensional global coordinate system that is common to all mobile reader agents; andupdate one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent. 11. The system of claim 10 wherein the sensor data comprises information from an accelerometer, a magnetometer, a gyroscope, and the position of an antenna that are on-board a mobile reader agent. 12. The system of claim 10 wherein the one or more mobile reader agents are configured to roam distinct non-overlapping subspaces within a read area. 13. The system of claim 10 wherein the processor is further configured by the inventory and agent control application to receive reference location data that is obtained from at least one anchor node, where the anchor node has a known location in global coordinates. 14. The system of claim 10 wherein control of the mobile reader agent is provided via proportional integral derivative (PID) control. 15. The system of claim 10 wherein the processor being configured to update one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent further comprises the processor being configured to receive obstacle data concerning agents and people in the read area. 16. The system of claim 10 wherein the processor being configured to convert the tag location data into the three-dimensional global coordinate system that is common to all mobile reader agents further comprises the processor being configured to express the sensor data in quaternions and using quaternion algebra to rotate the matrix. 17. The system of claim 10 wherein the processor being configured to update the one or more paths of one or more mobile reader agents to increase the coverage of reading tags in the subspace of the mobile reader agent further comprises the processor being configured to compute a path for a mobile reader agent around obstacles that are expressed in the form: xobsi={xεX|Ai(xi)∩0≠Ø} and xobsij={xεX|Ai(xi)∩Aj(xj)≠Ø} where xobs=(⋃i=1m⁢xobsi)⋃(⋃i≠ji,j⁢xobsij). 18. The system of claim 10 wherein the processor being configured to convert the tag location data into a global coordinate system that is common to all mobile reader agents further comprises the processor being configured to rotate the quaternion using a rotation matrix that is expressed as: R⁡(q_)=[-q02+q12-q22-q322⁢(q1⁢q2-q0⁢q3)2⁢(q1⁢q3+q0⁢q2)2⁢(q1⁢q2+q0⁢q3)q02-q12+q22-q322⁢(q2⁢q3-q0⁢q1)2⁢(q1⁢q3-q0⁢q2)2⁢(q2⁢q3+q0⁢q1)q02-q12-q22+q32].

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
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연합인증

Location based services for RFID and sensor networks 원문보기

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