Surface acoustic wave multiple sense element
First Claim
1. A sensor apparatus, comprising:
- a wireless sensor comprising a plurality of surface acoustic wave sensing elements, wherein each of said plurality of surface acoustic wave sensing elements is responsive to a wireless frequency range that differs from that of a wireless frequency range of the other surface acoustic wave sensing elements among said plurality of surface acoustic wave sensing elements in order to permit a wireless interrogation of said wireless sensor despite varying frequency standards thereof;
wherein the wireless sensor is configured to select one of the plurality of surface wave sensing elements based on a geographical location in which the sensor is employed; and
wherein the wireless sensor is further configured to interrogate only the selected surface wave sensing element.
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Abstract
A wireless sensor is disclosed, which includes a substrate upon which the wireless sensor can be configured. The wireless sensor includes a plurality of surface acoustic wave (SAW) sensing elements configured in parallel with one another upon the substrate, wherein one or more of the SAW sensing elements is responsive to a wireless frequency range that differs from that of a wireless frequency range of at least one other SAW sensing element among the group of SAW sensing elements. It is this parallelism that permits all of the SAW sensing elements to receive the same strain when pressure is applied thereon. In doing so, the capability for three separate interrogators to measure strain is provided. At any one location, however, only one style of interrogators can be employed, rendering two of the three SAW sensing elements useless, without interfering with the one SAW sensing element that is useful in order to permit a wireless interrogation of the wireless sensor despite varying international frequency standards thereof.
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Citations
20 Claims
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1. A sensor apparatus, comprising:
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a wireless sensor comprising a plurality of surface acoustic wave sensing elements, wherein each of said plurality of surface acoustic wave sensing elements is responsive to a wireless frequency range that differs from that of a wireless frequency range of the other surface acoustic wave sensing elements among said plurality of surface acoustic wave sensing elements in order to permit a wireless interrogation of said wireless sensor despite varying frequency standards thereof; wherein the wireless sensor is configured to select one of the plurality of surface wave sensing elements based on a geographical location in which the sensor is employed; and wherein the wireless sensor is further configured to interrogate only the selected surface wave sensing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surface acoustic wave sensing system, comprising:
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a substrate upon which a wireless sensor is configured; a wireless sensor comprising a plurality of surface acoustic wave sensing elements configured upon said substrate; a transmitter for transmitting wireless data to said plurality of surface acoustic wave sensing elements, wherein each of said plurality of surface acoustic wave sensing elements is responsive to a wireless frequency range that differs from that of a wireless frequency range of the other surface acoustic wave sensing elements among said plurality of surface acoustic wave sensing elements in order to permit a wireless interrogation of said wireless sensor despite varying frequency standards thereof; wherein the wireless sensor is configured to select one of the plurality of surface wave sensing elements based on a geographical location in which the sensor is employed; and wherein the wireless sensor is further configured to interrogate only the selected surface wave sensing element. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A sensor method, comprising the steps of:
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forming a wireless sensor upon a substrate; and configuring said wireless sensor to comprise a plurality of surface acoustic wave sensing elements located upon said substrate, wherein each of said plurality of surface acoustic wave sensing elements is responsive to a wireless frequency range that differs from that of a wireless frequency range of the other surface acoustic wave sensing elements among said plurality of surface acoustic wave sensing elements in order to permit a wireless interrogation of said wireless sensor despite varying frequency standards thereof; further configuring said wireless sensor to select one of the plurality of surface wave sensing elements based on a geographical location in which the sensor is employed; and further configuring said wireless sensor to interrogate only the selected surface wave sensing element. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification