Wireless sensor device
First Claim
Patent Images
1. A wireless sensor device comprising:
- a substrate provided with a circuit;
an antenna circuit for transmission and reception of radio waves, the antenna circuit formed on the substrate;
a battery for storing electrical energy obtained from the radio waves;
a sensor circuit for acquiring information by using the electrical energy;
a ferrite interposed between the substrate and the battery;
an airtight package packing the antenna circuit, the battery, the sensor circuit and the ferrite; and
a flexible printed board for electrically connecting the substrate and the battery,wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, andwherein the battery is sandwiched by the flexible printed board.
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Abstract
A wireless sensor device capable of constant operation without replacement of batteries. The wireless sensor device is equipped with a rechargeable battery and the battery is recharged wirelessly. Radio waves received at an antenna circuit are converted into electrical energy and stored in the battery. A sensor circuit operates with the electrical energy stored in the battery, and acquires information. Then, a signal containing the information acquired is converted into radio waves at the antenna circuit, whereby the information can be read out wirelessly.
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Citations
18 Claims
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1. A wireless sensor device comprising:
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a substrate provided with a circuit; an antenna circuit for transmission and reception of radio waves, the antenna circuit formed on the substrate; a battery for storing electrical energy obtained from the radio waves; a sensor circuit for acquiring information by using the electrical energy; a ferrite interposed between the substrate and the battery; an airtight package packing the antenna circuit, the battery, the sensor circuit and the ferrite; and a flexible printed board for electrically connecting the substrate and the battery, wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, and wherein the battery is sandwiched by the flexible printed board. - View Dependent Claims (4, 7, 10, 13, 16)
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2. A wireless sensor device comprising:
- a substrate provided with a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, an antenna circuit formed on the substrate, a battery, a sensor circuit, a ferrite interposed between the substrate and the battery, an airtight package packing the antenna circuit, the battery, the sensor circuit and the ferrite, and a flexible printed board electrically connecting the substrate and the battery,
wherein radio waves are converted into electrical energy at the antenna circuit; wherein the electrical energy is stored in the battery; wherein the sensor circuit acquires information by using the electrical energy; and wherein radio waves containing information acquired are radiated from the antenna circuit, and wherein the battery is sandwiched by the flexible printed board. - View Dependent Claims (5, 8, 11, 14, 17)
- a substrate provided with a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, an antenna circuit formed on the substrate, a battery, a sensor circuit, a ferrite interposed between the substrate and the battery, an airtight package packing the antenna circuit, the battery, the sensor circuit and the ferrite, and a flexible printed board electrically connecting the substrate and the battery,
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3. A wireless sensor device comprising:
- a substrate provided with a circuit including a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, a first antenna circuit formed on the substrate, a second antenna circuit formed on the substrate, a battery, a sensor circuit, a ferrite interposed between the substrate and the battery, an airtight package packing the first antenna circuit, the second antenna circuit, the battery, the sensor circuit and the ferrite, and a flexible printed board electrically connecting the substrate and the battery,
wherein radio waves are converted into electrical energy at the first antenna circuit; wherein the electrical energy is stored in the battery after being rectified by the rectifier circuit; wherein the sensor circuit acquires information by using the electrical energy; wherein information obtained by the sensor circuit is processed by the logic circuit and modulated by the modulation circuit; and wherein radio waves containing the information acquired are radiated from the second antenna circuit, and wherein the battery is sandwiched by the flexible printed board. - View Dependent Claims (6, 9, 12, 15, 18)
- a substrate provided with a circuit including a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit, a first antenna circuit formed on the substrate, a second antenna circuit formed on the substrate, a battery, a sensor circuit, a ferrite interposed between the substrate and the battery, an airtight package packing the first antenna circuit, the second antenna circuit, the battery, the sensor circuit and the ferrite, and a flexible printed board electrically connecting the substrate and the battery,
Specification