Abstract: An action recognition method includes: obtaining original feature submaps of each of temporal frames on a plurality of convolutional channels by using a multi-channel convolutional layer; calculating, by using each of the temporal frames as a target temporal frame, motion information weights of the target temporal frame on the convolutional channels according to original feature submaps of the target temporal frame and original feature submaps of a next temporal frame, and obtaining motion information feature maps of the target temporal frame on the convolutional channels according to the motion information weights; performing temporal convolution on the motion information feature maps of the target temporal frame to obtain temporal motion feature maps of the target temporal frame; and recognizing an action type of a moving object in image data of the target temporal frame according to the temporal motion feature maps of the target temporal frame on the convolutional channels.

Abstract: This application discloses a wireless charging device, a charging cradle, and a foreign object detection method. The wireless charging device includes a controller fitting a relationship between a Q value of the wireless charging device and a deviation of location space based on a wireless charging device parameter and an electronic device parameter. The electronic device parameter includes a Q1 value of the wireless charging device and a resonance frequency f1 of the resonant network when there is no foreign object at the at least one relative location between the transmitter coil and the receiver coil. The wireless charging device parameter includes an initial Q value Q0 of the wireless charging device and an initial resonance frequency f0 of the resonant network when the wireless charging device and the electronic device are in an uncoupled state. The controller performs foreign object detection based on the deviation relationship.

Abstract: A wireless charging device is provided in this application, which includes: a transmitter coil, a controller, and at least two detection coils. The at least two detection coils are located on a side of a plane on which the transmitter coil is located, and a plane on which the detection coils are located is parallel to the plane on which the transmitter coil is located. The controller is configured to: separately control the at least two detection coils to sequentially connect to an excitation power source, obtain parameters of the detection coils connected to the excitation power source, and control, based on a value difference between the parameters of the at least two detection coils, the transmitter coil to move, so that the transmitter coil aligns with a receiver coil in an electronic device. Furthermore, an automatic alignment method and a charging dock are also provided in this application.

Abstract: This disclosure discloses a wireless charging device and a wireless charging base. The wireless charging device includes an alignment mechanism and at least two transmit coils. Each transmit coil wirelessly charges a corresponding electronic device. Charging regions formed by the transmit coils on a charging plane are interconnected or overlap. The alignment mechanism drives each transmit coil to be aligned with a receive coil in a corresponding electronic device, and the transmit coil wirelessly charges the corresponding electronic device. The charging regions formed by the transmit coils are contiguous, and the charging regions covered by the transmit coils have no spacing in between and form a contiguous charging plane, in other words, a plurality of transmit coils form a relatively large charging region.

Abstract: A wireless charging device is provided in this disclosure, which includes a resonant network, an inverter circuit, and a controller. The resonant network includes a resonant capacitor and a transmitting coil. An input end of the inverter circuit is configured to connect to a direct current power supply, and an output end of the inverter circuit is configured to connect to the resonant network. The controller is configured to determine a moving direction of the transmitting coil based on a self-inductance of the transmitting coil or a resonant frequency of the resonant network, and control a movement of the transmitting coil based on the moving direction of the transmitting coil, to enable the wireless charging device to align with the electronic device.

Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.

Abstract: A wireless electric energy transmission system is provided, including a transmitter and a receiver. The transmitter includes a DC/AC inverter circuit, a first inductor, and a first capacitor that are connected in series. The transmitter is configured to: detect a value of a resonant frequency of the transmitter; detect a value of a coupling coefficient between the transmitter and the receiver; obtain a value of a constant-voltage operating frequency of the transmitter through calculation based on the resonant frequency and the coupling coefficient; and control an operating frequency of the DC/AC inverter circuit based on the constant-voltage operating frequency obtained through calculation.

Abstract: This application provides a wireless power transmission system. The system includes a transmitter and a receiver, where the transmitter includes a DC/AC inverter circuit, a first resonant inductor, a first capacitor, and a first compensation inductor that are connected in series; and the receiver includes an AC/DC rectifier circuit, a second resonant inductor, a second capacitor, and a second compensation inductor that are connected in series; and power at the transmitter is transmitted to the receiver through electromagnetic induction between the first resonant inductor and the second resonant inductor, and the AC/DC rectifier circuit is configured to provide the rectified power to a load of the receiver. This solution is applicable to a wireless power supply scenario or a wireless charging scenario.

Abstract: A wireless charging device is provided in this application, which includes: a transmitter coil, a controller, and at least two detection coils. The at least two detection coils are located on a side of a plane on which the transmitter coil is located, and a plane on which the detection coils are located is parallel to the plane on which the transmitter coil is located. The controller is configured to: separately control the at least two detection coils to sequentially connect to an excitation power source, obtain parameters of the detection coils connected to the excitation power source, and control, based on a value difference between the parameters of the at least two detection coils, the transmitter coil to move, so that the transmitter coil aligns with a receiver coil in an electronic device. Furthermore, an automatic alignment method and a charging dock are also provided in this application.

Abstract: This application discloses a wireless charging apparatus, a position detection method, and a system. The apparatus includes a transceiver end (100), and the transceiver end (100) includes a resonant network and a power conversion circuit. The apparatus further includes a controller (200), which is configured to determine a relative position between a transmit end (101) and a receive end (102) based on a self-inductance of a transmitting coil and at least one parameter, where the at least one parameter includes at least one of a coupling coefficient between the transmitting coil and a receiving coil and a coil mutual inductance between the transmitting coil and the receiving coil. The relative position between the transmit end (101) and the receive end (102) of wireless charging can be accurately detected by using the self-inductance of the transmitting coil and at least one of the coupling coefficient and the coil mutual inductance.

Abstract: A method includes performing a power loss calibration on a wireless power transfer system, enabling a wireless power transfer on the wireless power transfer system, calculating a power loss of the wireless power transfer system based on the power loss calibration, measuring a coupling factor between a transmitter coil and a receiver coil of the wireless power transfer system, and determining whether to continue the wireless power transfer of the wireless power transfer system based on the calculated power loss and the measured coupling factor.

Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.

Abstract: A wireless charging apparatus is provided, which includes a transmit end or a receive end. The transmit end includes a transmit end resonant network and an inverter circuit, and the transmit end resonant network includes a transmitting coil. The receive end includes a receive end resonant network and a rectifier circuit, and the receive end resonant network includes a receiving coil. The apparatus further includes a controller which is configured to obtain a relative position between the transmit end and the receive end based on a self-inductance of the transmitting coil and at least one parameter. The at least one parameter includes a current of the transmitting coil, efficiency of a wireless charging system formed by the transmit end and the receive end, and a direct current output voltage at the receive end. There is a single change relationship between the at least one parameter and the relative position.