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Foreign matter detection method and device of wireless power transmission system

A technology for wireless energy transmission and foreign object detection, applied in radio wave measurement systems, measurement devices, and electrical/magnetic exploration, etc., can solve problems such as low detection sensitivity, and achieve the effect of improving sensitivity and avoiding influences

Active Publication Date: 2014-12-24
深圳前海贞泰通信技术有限公司
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Problems solved by technology

[0008] Aiming at the problem that the foreign object detection of the wireless power transmission system is affected by the system power and the detection sensitivity is low in the related art, the present invention proposes a foreign object detection method and device for the wireless power transmission system, which can be independent of the system power itself, and enhance the sensitivity of foreign object detection

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  • Foreign matter detection method and device of wireless power transmission system
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  • Foreign matter detection method and device of wireless power transmission system

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0040] According to an embodiment of the present invention, a foreign object detection method of a wireless power transmission system is provided.

[0041] Such as figure 2 As shown, the foreign object detection method of the wireless power transmission system according to the embodiment of the present invention includes:

[0042] Step S201, receiving the detection pulse signal transmitted by the transmitting coil, and obtaining a damped oscillation waveform corresponding to the detection p...

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Abstract

The invention discloses a foreign matter detection method and device of a wireless power transmission system. The foreign matter detection method includes the steps of receiving detection pulse signals transmitted by a transmitting coil, obtaining damped oscillation waveforms corresponding to the detection pulse signals, counting the damped oscillation waveforms, comparing the counting result with the preset threshold value to obtain the comparison result, and determining whether the detection pulse signals are influenced by foreign matter or not according to the comparison result. The number of the damped oscillation waveforms is obtained through the method of transmitting detection pulses through the transmitting coil, whether foreign matter exists in the wireless power transmission system or not is judged on this basis, the foreign matter detection flexibility is improved, and the influences of the power of the wireless power transmission system on the detection process are avoided.

Description

technical field [0001] The present invention relates to the field of wireless power transmission, in particular to a foreign object detection method and device for a wireless power transmission system. Background technique [0002] At present, in the wireless power transmission system, the transmission of wireless power is mainly realized through the coupling of the transmitting coil and the receiving coil. Among them, the transmitting end mainly adjusts its working frequency and other parameters according to the coil voltage of the receiving end, so as to control the operating voltage of the receiving end within a certain voltage range and control the transmission power of the system. [0003] In the wireless power transmission technology, it generally adopts the transmission technology of inductive coupling power, that is, the energy is transferred to the load in a non-contact manner through electromagnetic coupling, from figure 1 It can be seen from the figure that the w...

Claims

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Application Information

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IPC IPC(8): G01V3/10
Inventor 鄢海峰龙海岸
Owner 深圳前海贞泰通信技术有限公司
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