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FOREIGN METAL DETECTION DEVICE, WIRELESS POWER-SUPPLYING DEVICE, WIRELESS POWER-RECEIVING DEVICE, AND WIRELESS POWER TRANSMISSION SYSTEM
FOREIGN METAL DETECTION DEVICE, WIRELESS POWER-SUPPLYING DEVICE, WIRELESS POWER-RECEIVING DEVICE, AND WIRELESS POWER TRANSMISSION SYSTEM
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机译:异物检测装置,无线供电装置,无线受电装置和无线输电系统
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摘要
[Problem] To reduce the likelihood of failing to detect a foreign metal. [Solution] A foreign metal detection device 14A is characterized by being equipped with: a sensor unit S which has at least one antenna coil L3 that receives a magnetic field or electric current and generates a vibration signal Vb; a vibration time length measurement circuit 145 which measures the vibration time length TL, which expresses the length of time required by the vibration of a vibration signal Vc outputted by the sensor unit S and of a prescribed wavenumber greater than 1; and a determination circuit 146 for determining whether there is a foreign metal near the antenna coil L3, on the basis of the vibration time length TL, and a reference time length CTL, which is the vibration time length TL when there is not a foreign metal nearby.
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