Sensor device having non-contact charge function and containers having the same
View Patent ↗A first base having a first antenna receiving electromagnetic waves and a second base having a sensor portion are separated. An antenna is provided over each of the first base and the second base such that the antennas are electromagnetically coupled. The first antenna constantly receives electromagnetic waves to generate electromotive force and charges a power storage portion. Since the electric power of the power storage portion is also used for driving of a sensor portion, the sensor portion operates even without communication with the external device. Provision of the first antenna receiving electromagnetic waves and the sensor portion on different bases permits miniaturization of a base having the sensor portion. Further, provision of the power storage portion storing electric power converted from electromagnetic waves received by the antenna enables operating the sensor actively.
1. A sensor device comprising:
a first antenna formed over a first base for receiving electromagnetic waves transmitted from an external device;
a second antenna formed over the first base and electrically connected to the first antenna;
a third antenna formed over a second base and electromagnetically coupled to the second antenna;
a power storage portion over the second base for storing electric power obtained by rectification of electromagnetic waves received by the third antenna; and
a sensor portion formed over the second base and configured to operate with the electric power supplied from the power storage portion,
wherein the first base and the second base are separated from each other.
2. A sensor device comprising:
a first antenna over a first base for receiving electromagnetic waves transmitted from an external device;
a power storage portion over the first base for storing electric power obtained by rectification of electromagnetic waves received by the first antenna;
a second antenna over the first base for transmitting electric power modified after being supplied from the power storage portion;
a third antenna over a second base electromagnetically coupled to the second antenna; and
a sensor portion over the second base which operates with electric power obtained by rectification of electromagnetic waves received by the third antenna.
3. A sensor device according to claim 1 , wherein the first antenna is a multi-frequency common antenna.
4. A sensor device according to claim 2 , wherein the first antenna is a multi-frequency common antenna.
5. A sensor device comprising:
a first base provided with an antenna portion for receiving electromagnetic waves transmitted from an external device, a power storage portion for storing electric power obtained by conversion of electromagnetic waves received by the antenna portion, and a first coil antenna; and
a second base provided with a sensor portion capable of measuring a physical quantity of an object and a second coil antenna,
wherein communication and supply/reception of electric power between the first base and the second base are performed by the first coil antenna and the second coil antenna, which are electromagnetically coupled.
6. A sensor device comprising:
a first base provided with an antenna portion for receiving electromagnetic waves transmitted from an external device and a first coil antenna; and
a second base including a sensor portion capable of measuring a physical quantity of an object, a power storage portion for storing electric power obtained by conversion of electromagnetic waves received by the antenna portion, and a second coil antenna, and
wherein communication and supply/reception of electric power between the first base and the second base are performed by the first coil antenna and the second coil antenna, which are electromagnetically coupled, and
wherein the first base and the second base are separated from each other.
7. A sensor device according to claim 5 , wherein the antenna portion includes a multi-frequency common antenna.
8. A sensor device according to claim 6 , wherein the antenna portion includes a multi-frequency common antenna.
9. A sensor device according to claim 1 , wherein the power storage portion is a capacitor.
10. A sensor device according to claim 2 , wherein the power storage portion is a capacitor.
11. A sensor device according to claim 5 , wherein the power storage portion is a capacitor.
12. A sensor device according to claim 6 , wherein the power storage portion is a capacitor.
13. A sensor device according to claim 9 , wherein the capacitor is an electric double layer capacitor.
14. A sensor device according to claim 10 , wherein the capacitor is an electric double layer capacitor.
15. A sensor device according to claim 11 , wherein the capacitor is an electric double layer capacitor.
16. A sensor device according to claim 12 , wherein the capacitor is an electric double layer capacitor.
17. A sensor device according to claim 1 , wherein a part of the first base and a part of the second base are overlapped with each other.
18. A sensor device according to claim 2 , wherein a part of the first base and a part of the second base are overlapped with each other.
19. A sensor device according to claim 5 , wherein a part of the first base and a part of the second base are overlapped with each other.
20. A sensor device according to claim 6 , wherein a part of the first base and a part of the second base are overlapped with each other.