Form factor and electromagnetic interference protection for process device wireless adapters
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04M-001/00
H01Q-001/24
H04B-001/16
출원번호
US-0485189
(2009-06-16)
등록번호
US-8694060
(2014-04-08)
발명자
/ 주소
Vanderaa, Joel D.
Grunig, Christina A.
Hurd, Ronald F.
Westfield, Brian L.
McGuire, Chad M.
Paullus, Steven B.
출원인 / 주소
Rosemount Inc.
대리인 / 주소
Westman, Champlin & Koehler, P.A.
인용정보
피인용 횟수 :
14인용 특허 :
202
초록▼
A process device wireless adapter includes a wireless communications module, a metallic housing, and an antenna. The wireless communications module is configured to communicatively couple to a process device and to a wireless receiver. The metallic housing surrounds the wireless communication module
A process device wireless adapter includes a wireless communications module, a metallic housing, and an antenna. The wireless communications module is configured to communicatively couple to a process device and to a wireless receiver. The metallic housing surrounds the wireless communication module and has a first end and a second end. The first end is configured to attach to the process device. In one embodiment, a metallic shield contacts the housing second end such that the metallic shield and the housing form a substantially continuous conductive surface. The antenna is communicatively coupled to the wireless communication module and separated from the wireless communication module by the metallic shield. Preferably, the wireless communications module illustratively includes a printed circuit board that has a length that is greater than its width.
대표청구항▼
1. A process device wireless adapter comprising: a wireless communications module configured to communicatively couple to a process device of a type used in an industrial process control or monitoring system, a process control loop to which the process device is coupled, and to a wireless receiver,
1. A process device wireless adapter comprising: a wireless communications module configured to communicatively couple to a process device of a type used in an industrial process control or monitoring system, a process control loop to which the process device is coupled, and to a wireless receiver, the wireless communications module being configured to be powered, at least in part, by the process device and also configured to interact with the process device in accordance with a standard industry protocol and to provide wireless communication capabilities to the process device;a metallic housing that surrounds the wireless communications module, the metallic housing having a first end and a second end, the first end configured to attach to the process device;an end cap having a metallic shield that contacts the housing second end such that the metallic shield and the housing form a substantially continuous conductive surface and shields the wireless communication module from electromagnetic interference; andan antenna communicatively coupled to the wireless communications module through an aperture in the metallic shield and separated from the wireless communications module by the metallic shield. 2. The process device wireless adapter of claim 1, wherein the wireless communications module comprises a printed circuit board, the printed circuit board having a length and a width, the length extending between the metallic housing first end and the metallic housing second end, and wherein the length is greater than the width. 3. The process device wireless adapter of claim 2, wherein the wireless communications module comprises a second printed circuit board, the second printed circuit board having a length and a width, the length of the second printed circuit board extending between the metallic housing first end and the metallic housing second end, and wherein the second printed circuit board length is greater than the second printed circuit board width. 4. The process device wireless adapter of claim 1, wherein the end cap further includes a plastic radome. 5. The process device wireless adapter of claim 1, wherein the metallic housing comprises aluminum. 6. The process device wireless adapter of claim 1, wherein the metallic housing comprises metalized plastic. 7. The process device wireless adapter of claim 1, wherein the metallic shield comprises stamped metal. 8. The process device wireless adapter of claim 1, wherein the metallic shield comprises plastic plated with a conductive material. 9. The process device wireless adapter of claim 1, wherein the metallic shield contacts the housing second end through spring fingers. 10. The process device wireless adapter of claim 1, wherein the metallic shield contacts the housing second end through a conductive elastomeric gasket. 11. A process device wireless adapter comprising: a metallic housing having a length and a radius configured to mount to a process device of a type used in an industrial process control or monitoring system;a printed circuit board within the metallic housing, the printed circuit board having a width and a length, the length of the printed circuit board running along the length of the metallic housing, the length of the printed circuit board being greater than the width of the printed circuit board, the printed circuit board configured to be communicatively coupled to a process device and to provide wireless communication capabilities to the process device;an end cap having a metallic shield that forms a continuous conductive surface with the metallic housing, the metallic shield having a first side and a second side, the printed circuit board positioned proximate the first side; an antenna electrically connected to the printed circuit board through an aperture in the metallic shield, the antenna positioned proximate the metallic shield second side, the antenna configured to wirelessly transmit communications to a wireless receiver and to wirelessly receive communications from the wireless receiver; andwherein the metallic shield shields the circuit board from electromagnetic radiation. 12. The process device wireless adapter of claim 11, wherein the antenna is a “rubber duck” style whip antenna. 13. The process device wireless adapter of claim 11, wherein potting is included within the metallic housing. 14. The process device wireless adapter of claim 11, further comprising a mechanical attachment region configured to attach to a process device conduit. 15. The process device wireless adapter of claim 14, wherein the mechanical connection region includes a threaded surface. 16. The process device wireless adapter of claim 1, wherein the standard industry protocol is 4-20 mA. 17. The process device wireless adapter of claim 1, wherein the standard industry protocol is HART. 18. The process device wireless adapter of claim 1, wherein the standard industry protocol is Modbus. 19. The process device wireless adapter of claim 1, wherein the standard industry protocol is FOUNDATION Fieldbus. 20. The process device wireless adapter of claim 1, wherein the standard industry protocol is CAN. 21. The process device wireless adapter of claim 1, wherein the standard industry protocol is Profibus—PA. 22. The process device wireless adapter of claim 1, wherein the metallic housing is configured to meet intrinsic safety requirements. 23. The process device wireless adapter of claim 1, wherein the metallic shield is further part of a ground plane of the antenna. 24. The process device wireless adapter of claim 11, wherein the metallic housing is in accordance with intrinsic safety requirements. 25. The process device wireless adapter of claim 11, wherein the metallic shield is further part of a ground plane of the antenna.
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이 특허에 인용된 특허 (202)
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