Device for converting a movement of a user into a voltage
First Claim
1. A device for converting a movement of a user into a voltage, the device comprising:
- a neck cord;
a piezoelectric sensor coupled to the neck cord, wherein the piezoelectric sensor has at least one end point and is bendable relative to a plane including the at least one end point; and
a printed circuit board, coupled to the piezoelectric sensor, wherein the neck cord is arranged to provide in use a pulling force acting on the piezoelectric sensor in a first direction, a weight of the printed circuit board causes a gravity force to act on the piezoelectric sensor in a second direction being different from the first direction such that the movement of the user wearing the neck cord results in a change in the shape of the piezoelectric sensor, the piezoelectric sensor generating the voltage in response to the change in the shape.
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Accused Products
Abstract
A device (10) for converting a movement of a user into a voltage comprises a neck cord (20), a piezoelectric sensor (30) and a printed circuit board (40). The neck cord is coupled to the piezoelectric sensor and provides in use a pulling force that acts on the piezoelectric sensor in a first direction. The printed circuit board is electrically and mechanically coupled to the piezoelectric sensor. The weight of the printed circuit board cause in use a gravity force to act on the piezoelectric sensor in a second direction, which differs from the first direction such that the movement of the user (5) wearing the neck cord causes a change in the shape of the piezoelectric sensor which in response thereto generates the voltage. The voltage may be used as a supply source for an electrical component (41) mounted on the PCB, or may be used as a wake-up signal for an electrical component such as a processor (41) or an accelerometer.
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Citations
15 Claims
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1. A device for converting a movement of a user into a voltage, the device comprising:
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a neck cord; a piezoelectric sensor coupled to the neck cord, wherein the piezoelectric sensor has at least one end point and is bendable relative to a plane including the at least one end point; and a printed circuit board, coupled to the piezoelectric sensor, wherein the neck cord is arranged to provide in use a pulling force acting on the piezoelectric sensor in a first direction, a weight of the printed circuit board causes a gravity force to act on the piezoelectric sensor in a second direction being different from the first direction such that the movement of the user wearing the neck cord results in a change in the shape of the piezoelectric sensor, the piezoelectric sensor generating the voltage in response to the change in the shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of converting a movement of a user into a voltage, the method comprising the steps of:
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applying a pulling force, via a neck cord, to a piezoelectric sensor in a first direction, wherein the piezoelectric sensor has at least one end point and is bendable relative to a plane including the at least one end point; applying a second force to the piezoelectric sensor in a second direction via a weight of a printed circuit board coupled to and acting on the piezoelectric sensor in the second direction and the pulling force passed on by the neck cord in the first direction to the piezoelectric sensor cause a change in the shape of the piezoelectric sensor, wherein the piezoelectric sensor generates a voltage corresponding to the change in the shape. - View Dependent Claims (13, 14, 15)
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Specification