Coupling loop, cable assembly and method for positioning...

H - Electricity – 04 – B

Patent

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H04B 5/00 (2006.01) A61B 5/00 (2006.01) G01R 33/00 (2006.01)

Patent

CA 2614599

A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The coupling loop includes multiple loops. Preferably two tuned loops are used for transmitting the energizing signal to the sensor and an un-tuned loop is used for receiving the sensor signal from the sensor. A cable attached to the coupling loop provides maximum isolation between the energizing signal and the sensor signal by maximizing the distance between the coaxial cables that carry the signals and maintaining the relative positions of the coaxial cables throughout the cable assembly. Orientation features on the housing for the coupling loop and the sensor are provided to assist in positioning the coupling loop relative to the sensor to maximize the coupling between the sensor signal and the coupling loop.

L'invention concerne une boucle de couplage ou une antenne pouvant être utilisée avec un système conçu pour mesurer la fréquence de résonance d'un capteur. Pour ce faire, le système ajuste la phase et la fréquence d'un signal de charge jusqu'à ce que la fréquence du signal de charge corresponde à la fréquence de résonance du capteur. Cette boucle de couplage comprend plusieurs boucles, y compris, de préférence, deux boucles accordées pour transmettre le signal de charge au capteur et une boucle non accordée pour recevoir le signal transmis par le capteur. Un câble relié à la boucle de couplage fournit une isolation maximale entre le signal de charge et le signal du capteur, car il permet d'augmenter au maximum la distance entre les câbles coaxiaux qui transportent les signaux et de maintenir les positions relatives des câbles coaxiaux dans l'ensemble du câble. Le logement de la boucle de couplage et du capteur comporte des éléments d'orientation permettant de positionner la boucle de couplage par rapport au capteur pour augmenter au maximum le couplage entre le signal du capteur et la boucle de couplage.

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