Contactless charging device, program therefor, and automobile having contactless charging device mounted therein
First Claim
Patent Images
1. A contactless charging device comprising:
- a placement plate on which a portable apparatus is placed;
a charging coil that is disposed to oppose a rear surface side of the placement plate;
a position detector configured to include a position detection coil disposed on or under the placement plate, and detects the portable apparatus present on the placement plate;
a foreign object detector configured to include a foreign object detection coil disposed on or under the placement plate, and detect a conductive foreign object present on the placement plate;
an alarm configured to issue a warning to a user;
a controller configured to control the position detector, the foreign object detector, and the alarm; and
a memory configured to store data,wherein the controller alternately drives the position detector and the foreign object detector,when a detection level frequency detected by the foreign object detector is higher than a second threshold value, the controller turns a foreign object warning flag ON and holds a time point at which the foreign object warning flag is turned ON in the memory,when an echo signal frequency captured by the position detector is higher than a first threshold value, the controller holds a time point at which the echo signal frequency is higher than the first threshold value in the memory, andwhen a time difference between the time point at which the foreign object warning flag is turned ON and the time point at which the echo signal frequency is higher than the first threshold value is equal to or more than a predetermined time, the controller controls the alarm to issue the warning.
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Abstract
A contactless charging device includes a placement plate on which a portable apparatus is placed, a charging coil, a position detector having a position detection coil, a foreign object detector having a foreign object detection coil, an alarm, and a controller. The position detection coil and the foreign object detection coil are disposed on or under the placement plate. The controller drives the alarm if the foreign object detector detects the presence of a conductive foreign object on the placement plate, and then the position detector detects the portable apparatus on the placement plate.
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Citations
4 Claims
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1. A contactless charging device comprising:
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a placement plate on which a portable apparatus is placed; a charging coil that is disposed to oppose a rear surface side of the placement plate; a position detector configured to include a position detection coil disposed on or under the placement plate, and detects the portable apparatus present on the placement plate; a foreign object detector configured to include a foreign object detection coil disposed on or under the placement plate, and detect a conductive foreign object present on the placement plate; an alarm configured to issue a warning to a user; a controller configured to control the position detector, the foreign object detector, and the alarm; and a memory configured to store data, wherein the controller alternately drives the position detector and the foreign object detector, when a detection level frequency detected by the foreign object detector is higher than a second threshold value, the controller turns a foreign object warning flag ON and holds a time point at which the foreign object warning flag is turned ON in the memory, when an echo signal frequency captured by the position detector is higher than a first threshold value, the controller holds a time point at which the echo signal frequency is higher than the first threshold value in the memory, and when a time difference between the time point at which the foreign object warning flag is turned ON and the time point at which the echo signal frequency is higher than the first threshold value is equal to or more than a predetermined time, the controller controls the alarm to issue the warning. - View Dependent Claims (2, 3, 4)
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Specification