Foreign matter sensing device and non-contact electric-power transfer system
First Claim
1. A foreign matter sensing device that detects a foreign matter between a vehicle-side coil, which is used when a battery equipment mounted to a vehicle is charged and discharged, and an out-of-vehicle coil which performs a non-contact electric-power transfer with the vehicle-side coil, the foreign matter sensing device comprising:
- an imaging portion that imaging an image of a foreign matter detection range above the out-of-vehicle coil;
a first determiner that determines whether there is a foreign matter in the foreign matter detection range based on the image imaged by the imaging portion;
a temperature sensor sensing a temperature of the foreign matter detection range; and
a second determiner that determines whether there is a foreign matter in the foreign matter detection range based on the temperature sensed by the temperature sensor, whereinthe first determiner determines whether there is a foreign matter in the foreign matter detection range in response to a start demand instructing to start transferring electric-power,the second determiner executes determining whether there is a foreign matter in the foreign matter detection range while electric-power is transferred between the vehicle-side coil and the out-of-vehicle coil, after the first determiner determines that there is no foreign matter;
the second determiner determines whether there is a foreign matter in the foreign matter detection range by comparing the temperature sensed by the temperature sensor with a prediction temperature of the foreign matter detection range assumed while the non-contact electric-power transfer is performed;
the foreign matter sensing device further comprises;
a position displacement measuring portion that measures a position displacement of the out-of-vehicle coil from a reference position based on the image imaged by the imaging portion, the reference position being defined by a relative position of the out-of-vehicle coil relative to the vehicle-side coil at which a power transmission efficiency of the non-contact electric-power transfer becomes the maximum; and
a first correction portion that corrects the prediction temperature based on the position displacement of the out-of-vehicle coil measured by the position displacement measuring portion.
1 Assignment
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Accused Products
Abstract
A foreign matter sensing device includes a first determiner that determines whether there is a foreign matter in a foreign matter detection range based on an image imaged by an imaging portion, and a second determiner that determines whether there is a foreign matter in the foreign matter detection range based on a temperature sensed by a temperature sensor. The second determiner executes determining whether there is a foreign matter in the foreign matter detection range while electric-power is transferred between a vehicle-side coil and an out-of-vehicle coil, when the first determiner determines that there is no foreign matter after the imaging portion images the image of the foreign matter detection range in response to a start demand instructing to start transferring electric-power.
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Citations
23 Claims
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1. A foreign matter sensing device that detects a foreign matter between a vehicle-side coil, which is used when a battery equipment mounted to a vehicle is charged and discharged, and an out-of-vehicle coil which performs a non-contact electric-power transfer with the vehicle-side coil, the foreign matter sensing device comprising:
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an imaging portion that imaging an image of a foreign matter detection range above the out-of-vehicle coil; a first determiner that determines whether there is a foreign matter in the foreign matter detection range based on the image imaged by the imaging portion; a temperature sensor sensing a temperature of the foreign matter detection range; and a second determiner that determines whether there is a foreign matter in the foreign matter detection range based on the temperature sensed by the temperature sensor, wherein the first determiner determines whether there is a foreign matter in the foreign matter detection range in response to a start demand instructing to start transferring electric-power, the second determiner executes determining whether there is a foreign matter in the foreign matter detection range while electric-power is transferred between the vehicle-side coil and the out-of-vehicle coil, after the first determiner determines that there is no foreign matter; the second determiner determines whether there is a foreign matter in the foreign matter detection range by comparing the temperature sensed by the temperature sensor with a prediction temperature of the foreign matter detection range assumed while the non-contact electric-power transfer is performed; the foreign matter sensing device further comprises; a position displacement measuring portion that measures a position displacement of the out-of-vehicle coil from a reference position based on the image imaged by the imaging portion, the reference position being defined by a relative position of the out-of-vehicle coil relative to the vehicle-side coil at which a power transmission efficiency of the non-contact electric-power transfer becomes the maximum; and a first correction portion that corrects the prediction temperature based on the position displacement of the out-of-vehicle coil measured by the position displacement measuring portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A foreign matter sensing device configured to detect a foreign matter between a vehicle-side coil, which is used when a battery equipment mounted to a vehicle is charged and discharged, and an out-of-vehicle coil which performs a non-contact electric-power transfer with the vehicle-side coil, the foreign matter sensing device comprising:
a control unit, including a microcomputer and storage memory, the control unit configured to; receive image data corresponding to an image of a foreign matter detection range proximate to the out-of-vehicle coil; conduct a first determination of whether there is foreign matter in the foreign matter detection range based on the received image data in response to a start command instructing to start transfer of electric-power; receive temperature data corresponding to a temperature of the foreign matter detection range; conduct a second determination of whether there is foreign matter in the foreign matter detection range based on received temperature data while electric-power is transferred between the vehicle-side coil and the out-of-vehicle coil and after the first determination determines that there is no foreign matter in the foreign matter detection range;
wherein the second determination determines whether there is a foreign matter in the foreign matter detection range by comparing the temperature corresponding to the received temperature data with a prediction temperature of the foreign matter detection range assumed while the non-contact electric-power transfer is performed;measure a position displacement of the out-of-vehicle coil from a reference position based on the image corresponding to the received image data, the reference position being defined by a relative position of the out-of-vehicle coil relative to the vehicle-side coil at which a power transmission efficiency of the non-contact electric-power transfer becomes the maximum; and correct the prediction temperature based on the measured position displacement of the out-of-vehicle coil.
Specification