[특허]Interrogator for detecting adjacent transponders

Interrogator for detecting adjacent transponders 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-013/75
출원번호	US-0483485 (1995-06-07)
발명자 / 주소	Schuermann Josef H. (Oberhummel DEX)
출원인 / 주소	Texas Instruments Deutschland GmbH (DEX 03)
인용정보	피인용 횟수 : 108 인용 특허 : 0

초록 ▼

A method for interrogating remote transponders having the steps of: sending an RF interrogation pulse from an interrogator (10), receiving by a first and second transponder (12,12a) the RF interrogation pulse, and establishing in a resonant circuit (130) of each of the transponders (12,12a) an oscillation, the oscillation being established by the coupling of signal energy from the RF interrogation pulse into the resonant circuit (130). After the RF interrogation pulse ends, the first transponder (12) senses the termination of the pulse and initiates a first RF response having a selected duration. A second RF response from the second transponder (12a) will also be detected in the first transponder (12) whose response will be affected by this second RF response. The differing response times in the first transponder (12) for responses affected and unaffected by neighboring transponders may be sensed in the interrogator so the interrogator may detect instances in which the RF responses which it received may have been conflicting.

대표청구항 ▼

An interrogator for wireless communication with at least two transponders, said interrogator comprising: a. an RF oscillator; b. a transmitter that receives the output of said RF oscillator and initiates an RF interrogation signal for interrogating said at least two transponders; c. an antenna operable to receive the output of said transmitter and transmits said RF interrogation signal to said at least two transponders, thereby causing each of said transponders to transmit RF responses, and operable to receive said RF responses; d. a receiver for receiving said RF responses via said antenna upon termination of said RF interrogation pulse; and e. a control circuit, said control circuit operable to initiate said RF interrogation signal in said transmitter, to disable the output of said transmitter and thereby enable reception of at least one of said RF responses upon termination of said RF interrogation signal, to receive at least one of said RF responses from said receiver, and to measure the duration of said at least one RF response thereby determining whether multiple transponders exist adjacent to each other.

이 특허를 인용한 특허 (108)

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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

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