Foreign matter detection device
First Claim
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1. A foreign matter detection device comprising:
- a temperature detection means that is provided between a power-supplying device and a power-receiving device and detects a temperature distribution in a magnetic field formed by the power-supplying device transmitting power wirelessly to the power-receiving device; and
a signal processor that, based on a detection result from the temperature detection means, detects a conductive foreign matter in the magnetic field, whereinthe power-supplying device is provided with a power-supplying coil; and
a supporting portion is located above the power-supplying coil, andthe temperature detection means is provided so that the temperature detection means is large enough to cover the entirety of an upper surface of the power-supplying coil from above,wherein the temperature detection means is provided with;
an optical waveguide laid in the magnetic field, a part of the optical waveguide being wound in the same shape as the power-supplying coil;
a light source unit that outputs detection light into the optical waveguide; and
a light-receiving unit that receives the detection light through the optical waveguide,whereinthe optical waveguide is an optical fiber;
the power-supplying coil is provided in a parking space for a vehicle;
the supporting portion is formed from an insulating material which supports the optical fiber and comprises at least one flexible wire components; and
each of the at least one flexible wire components deform and return to their original shape after they have been deformed.
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Abstract
A foreign matter detection device of the present invention is provided with a temperature detection means that detects a temperature distribution in a magnetic field that is formed by a power-supplying device that transmits power wirelessly to a power-receiving device; and a signal processor that, based on a detection result from the temperature detection means, detects a conductive foreign matter in the magnetic field.
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Citations
4 Claims
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1. A foreign matter detection device comprising:
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a temperature detection means that is provided between a power-supplying device and a power-receiving device and detects a temperature distribution in a magnetic field formed by the power-supplying device transmitting power wirelessly to the power-receiving device; and a signal processor that, based on a detection result from the temperature detection means, detects a conductive foreign matter in the magnetic field, wherein the power-supplying device is provided with a power-supplying coil; and a supporting portion is located above the power-supplying coil, and the temperature detection means is provided so that the temperature detection means is large enough to cover the entirety of an upper surface of the power-supplying coil from above, wherein the temperature detection means is provided with; an optical waveguide laid in the magnetic field, a part of the optical waveguide being wound in the same shape as the power-supplying coil; a light source unit that outputs detection light into the optical waveguide; and a light-receiving unit that receives the detection light through the optical waveguide, wherein the optical waveguide is an optical fiber; the power-supplying coil is provided in a parking space for a vehicle; the supporting portion is formed from an insulating material which supports the optical fiber and comprises at least one flexible wire components; and each of the at least one flexible wire components deform and return to their original shape after they have been deformed. - View Dependent Claims (2, 3, 4)
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Specification