Wireless sensor device
First Claim
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1. A wireless sensor device comprising:
- an antenna circuit for transmission and reception of radio waves;
a battery for storing electrical energy obtained from the radio waves;
a sensor circuit for acquiring information by using the electrical energy; and
an airtight package packing the antenna circuit, the battery and the sensor circuit.
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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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an antenna circuit for transmission and reception of radio waves; a battery for storing electrical energy obtained from the radio waves; a sensor circuit for acquiring information by using the electrical energy; and an airtight package packing the antenna circuit, the battery and the sensor circuit. - View Dependent Claims (4, 7, 10, 13, 16)
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2. A wireless sensor device comprising:
- an antenna circuit, a battery, a sensor circuit, and an airtight package packing the antenna circuit, the battery and the sensor circuit,
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 the information acquired are radiated from the antenna circuit. - View Dependent Claims (5, 8, 11, 14, 17)
- an antenna circuit, a battery, a sensor circuit, and an airtight package packing the antenna circuit, the battery and the sensor circuit,
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3. A wireless sensor device comprising:
- a first antenna circuit, a second antenna circuit, a battery, a sensor circuit, and an airtight package packing the first antenna circuit, the second antenna circuit, the battery and the sensor circuit,
wherein radio waves are converted into electrical energy at the first 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 the information acquired are radiated from the second antenna circuit. - View Dependent Claims (6, 9, 12, 15, 18)
- a first antenna circuit, a second antenna circuit, a battery, a sensor circuit, and an airtight package packing the first antenna circuit, the second antenna circuit, the battery and the sensor circuit,
Specification