Wireless sensor for thermal property with thermal source
First Claim
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1. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
- a substrate;
an antenna disposed on the substrate;
an electronic circuit disposed on the substrate and electrically coupled to the antenna, the electronic circuit comprising one or more of a transistor, a diode, a resistor and a capacitor;
a heating element electrically coupled to the electronic circuit for heating a target area; and
a sensing element thermally coupled to the heating element for sensing a temperature of the heating element, such that when the heating element is thermally coupled to the target area, the RFID tag wirelessly receives a first power having a first form from a transceiver, the electronic circuit transforms the first power to a second power having a second form different from the first form and delivers the second power to the heating element, the sensing element senses a time variation of the heating element temperature, and the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the target area based on the sensed time variation of the heating element temperature,wherein the thermal characteristic of the target area wirelessly transmitted to the transceiver includes at least one of a thermal conductance of the target area, a thermal resistance of the target area, a thermal conductivity of the target area, a thermal diffusivity of the target area, and a heat capacity of the target area.
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Abstract
A radio frequency (RF) sensing device in an assembly is adapted to wirelessly communicate with a remote transceiver. The sensing device includes a substrate; an antenna disposed on the substrate; an electronic circuit disposed on the substrate and electrically coupled to the antenna; a heating element electrically coupled to the electronic circuit for heating a target area; and a sensing element thermally coupled to the heating element for sensing a temperature of the heating element. The RF sensing device is configured to wirelessly receive a power and provides the power to the heating element.
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Citations
20 Claims
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1. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
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a substrate; an antenna disposed on the substrate; an electronic circuit disposed on the substrate and electrically coupled to the antenna, the electronic circuit comprising one or more of a transistor, a diode, a resistor and a capacitor; a heating element electrically coupled to the electronic circuit for heating a target area; and a sensing element thermally coupled to the heating element for sensing a temperature of the heating element, such that when the heating element is thermally coupled to the target area, the RFID tag wirelessly receives a first power having a first form from a transceiver, the electronic circuit transforms the first power to a second power having a second form different from the first form and delivers the second power to the heating element, the sensing element senses a time variation of the heating element temperature, and the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the target area based on the sensed time variation of the heating element temperature, wherein the thermal characteristic of the target area wirelessly transmitted to the transceiver includes at least one of a thermal conductance of the target area, a thermal resistance of the target area, a thermal conductivity of the target area, a thermal diffusivity of the target area, and a heat capacity of the target area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
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a substrate; a power source disposed on the substrate; an antenna disposed on the substrate; an electronic circuit disposed on the substrate and electrically coupled to the antenna and the power source, the electronic circuit comprising one or more of a transistor, a diode, a resistor and a capacitor; a heating element electrically coupled to the electronic circuit and the power source for heating a target area; and a sensing element thermally coupled to the heating element for sensing a temperature of the heating element, such that when the heating element is thermally coupled to the target area, the power source delivers a heating power to the heating element, the sensing element senses a time variation of the heating element temperature, and the RFID tag wirelessly transmits to a transceiver a thermal characteristic of the target area based on the sensed time variation of the heating element temperature, wherein the thermal characteristic of the target area wirelessly transmitted to the transceiver includes at least one of a thermal conductance of the target area, a thermal resistance of the target area, a thermal conductivity of the target area, a thermal diffusivity of the target area, and a heat capacity of the target area. - View Dependent Claims (12, 13, 14)
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15. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
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a substrate; an antenna disposed on the substrate; an electronic circuit disposed on the substrate and electrically coupled to the antenna, the electronic circuit comprising one or more of a transistor, a diode, a resistor and a capacitor; a heating element electrically coupled to the electronic circuit for heating a target area; and a sensing element thermally coupled to the heating element for sensing a temperature of the heating element, such that when the heating element is thermally coupled to the target area, the RFID tag wirelessly receives a first power having a first form from a transceiver, the electronic circuit transforms the first power to a second power having a second form different from the first form and delivers the second power to the heating element, the sensing element senses a time variation of the heating element temperature, and the RFID tag wirelessly transmits to the transceiver the sensed time variation of the heating element temperature, the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the target area based on the sensed time variation of the heating element temperature, wherein the thermal characteristic of the target area wirelessly transmitted to the transceiver includes at least one of a thermal conductance of the target area, a thermal resistance of the target area, a thermal conductivity of the target area, a thermal diffusivity of the target area, and a heat capacity of the target area. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification