Power generating apparatus
A power-generating apparatus includes: a deformation member that is provided with a first piezoelectric device and deformed while switching a deformation direction; an amount of deformation detection unit that detects an amount of deformation of the deformation member; a pair of electrodes provided on the first piezoelectric device; a switch provided between the pair of electrodes; and a switch control unit that controls the switch to cause short-circuit between the pair of electrodes for a predetermined period when the amount of deformation is equal to or more than a predetermined amount.
1. A power-generating apparatus comprising:
a deformation member that is provided with a first piezoelectric device and deformed while switching a deformation direction;
an amount of deformation detection unit that detects an amount of deformation of the deformation member;
a pair of electrodes provided on the first piezoelectric device;
a switch provided between the pair of electrodes; and
a switch control unit that controls the switch to cause short-circuit between the pair of electrodes for a predetermined period when the amount of deformation is equal to or more than a predetermined amount,
wherein the amount of deformation detection unit includes:
a second piezoelectric device provided on the deformation member and used for detection of the amount of deformation; and
a voltage detection unit that detects a voltage generated in the second piezoelectric device.
2. The power-generating apparatus according to claim 1 , further comprising an inductor that is provided between the pair of electrodes and series-connected to the switch to form a resonance circuit with a capacitance component of the first piezoelectric device,
wherein the switch control unit is a unit that connects the switch when the deformation direction of the deformation member is switched, and then, disconnects the switch after a time corresponding to a half period of a resonance period of the resonance circuit has elapsed in a period in which the amount of deformation does not reach the predetermined amount.
3. The power-generating apparatus according to claim 2 , wherein the second piezoelectric device is provided in a position opposed to the first piezoelectric device with the deformation member in between.
4. The power-generating apparatus according to claim 1 , wherein pluralities of the first piezoelectric devices and the second piezoelectric devices are provided.
5. An electronic device comprising the power-generating apparatus according to claim 1 .
6. An electronic device comprising the power-generating apparatus according to claim 2 .
7. An electronic device comprising the power-generating apparatus according to claim 3 .
8. An electronic device comprising the power-generating apparatus according to claim 4 .
9. A transportation device comprising the power-generating apparatus according to claim 1 .
10. A transportation device comprising the power-generating apparatus according to claim 2 .
11. A transportation device comprising the power-generating apparatus according to claim 3 .
12. A transportation device comprising the power-generating apparatus according to claim 4 .