ELECTRONIC SENSING SYSTEM WITH ENVIRONMENTAL SENSOR PATCHES
First Claim
1. An electronic sensing system, comprising:
- a substrate with a detection region;
a transceiver formed on a transceiver substrate separate from the substrate and affixed to the substrate, the transceiver including an output pad for making an electrical connection, an excitation circuit adapted to provide an excitation signal to the output pad, an input pad for making an electrical connection, a detection circuit connected to the input pad, and an interface responsive to a downlink signal to transmit an uplink signal representing the electrical state of the input pad; and
a plurality of sensor patches disposed over the substrate, each sensor patch disposed at least partly in the detection region, having a conductance susceptible to a respective environmental factor, and being electrically conductive before exposure to the respective environmental factor;
whereinthe sensor patches are distributed over the substrate so that they are exposed to an external environmental factor substantially contemporaneously and the output pad is electrically connected to the input pad through the plurality of sensor patches in series, so that the detection circuit detects an electrical state of the input pad in response to the excitation signal and the respective conductances of each of the plurality of sensor patches.
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Accused Products
Abstract
An electronic sensing system has a transceiver with input and output pads, an excitation circuit connected to the output pad, and a detection circuit connected to the input pad. An electrically-conductive sensor patch has an electrical state that changes with exposure to a corresponding environmental factor. The detection circuit detects an electrical state of the input electrical-connection pad in response to the excitation signal and the electrical state of the input pad. Several electrically-conductive sensor patches are distributed over the substrate so that they are exposed to an external environmental factor substantially contemporaneously, each having a conductance susceptible to a respective environmental factor. The output pad is electrically connected to the input pad through the sensor patches in series, so that the detection circuit detects an electrical state of the input pad in response to the excitation signal and the respective conductances of the sensor patches.
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Citations
23 Claims
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1. An electronic sensing system, comprising:
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a substrate with a detection region; a transceiver formed on a transceiver substrate separate from the substrate and affixed to the substrate, the transceiver including an output pad for making an electrical connection, an excitation circuit adapted to provide an excitation signal to the output pad, an input pad for making an electrical connection, a detection circuit connected to the input pad, and an interface responsive to a downlink signal to transmit an uplink signal representing the electrical state of the input pad; and a plurality of sensor patches disposed over the substrate, each sensor patch disposed at least partly in the detection region, having a conductance susceptible to a respective environmental factor, and being electrically conductive before exposure to the respective environmental factor;
whereinthe sensor patches are distributed over the substrate so that they are exposed to an external environmental factor substantially contemporaneously and the output pad is electrically connected to the input pad through the plurality of sensor patches in series, so that the detection circuit detects an electrical state of the input pad in response to the excitation signal and the respective conductances of each of the plurality of sensor patches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic sensing system, comprising:
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a substrate with a detection region; a transceiver formed on a transceiver substrate separate from the substrate and affixed to the substrate, the transceiver including an output pad for making an electrical connection, an excitation circuit adapted to provide an excitation signal to the output pad, an input pad for making an electrical connection, a detection circuit connected to the input pad, and an interface responsive to a downlink signal to transmit an uplink signal representing the electrical state of the input pad; and a plurality of sensor patches disposed over the substrate, each sensor patch disposed at least partly in the detection region, having a conductance susceptible to a respective environmental factor, and being electrically conductive before exposure to the respective environmental factor, the sensor patches distributed over the substrate so that they are exposed to an external environmental factor substantially contemporaneously;
whereinthe output pad is electrically connected to the input pad through the plurality of sensor patches in parallel, so that the detection circuit detects an electrical state of the input pad in response to the excitation signal and the respective conductances of each of the plurality of sensor patches. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification