Abstract: Systems, apparatuses and methods for indicating a moveable device such as an unmanned aerial vehicle (UAV) are disclosed herein. The present technology provides an illumination system having a light source and an illuminating component. In a representative embodiment, the light source is carried by a UAV and positioned to emit a light ray in a first direction. The illuminating component is carried by a propeller of the UAV. The illuminating component can include a light entrance portion, a light transmission portion, and a light exit portion. The light entrance portion is positioned to receive the light ray from the light source, the light transmission portion is positioned to transmit the light ray to the light exit portion, and the light exit portion is positioned to direct the light ray in a second direction so as to form a visual indication corresponding to the UAV.

Abstract: An encoder includes a code disc and a processor communicatively coupled with the code disc. The code disc is configured to rotate along with a rotating object and includes a plurality of fan teeth extending radially. Each of the fan teeth includes a first line segment edge, a second line segment edge, and an arc edge along a circumference of the code disc and connecting the first line segment edge and the second line segment edge. The first line segment edges of the fan teeth are arranged at the code disc with equal intervals. A length of the arc edge of one of the fan teeth is different from lengths of the arc edges of other ones of the fan teeth, and the lengths of the arc edges of the other ones of the fan teeth equal each other. The processor is configured to detect a rotation of the code disc to obtain a detection signal, and obtain a rotation parameter of the rotating object based on the detection signal.

Abstract: A method for generating sound with a motor, including: generating a motor-driving signal having an audio signal component; applying the motor-driving signal to the motor, wherein the motor-driving signal drives the motor to generate a sound corresponding to the audio signal component; applying a bandpass filter to the motor-driving signal to generate a filtered motor-driving signal; and applying the filtered motor-driving signal to a speaker to present audio content consistent with the sound generated by the motor.

Abstract: A throttle control signal processing method includes receiving, by an electronic speed regulator from a controller, a first throttle control signal via a throttle signal interface and a second throttle control signal via a communication interface simultaneously and separately in parallel. The method further includes monitoring, in a real time, a signal transmission state of the throttle signal interface. The method also includes controlling, in response to determining that the signal transmission state of the throttle signal interface is abnormal, rotation of a motor according to the second throttle control signal.

Abstract: An apparatus and system for generating sound and methods for making and using same. A motor-driving signal with an audio signal component is applied to a motor. When driven by the motor-driving signal, the motor thereby can generate a sound that corresponds to the audio signal component. An exemplary sound can include high-quality audio content such as music, speech, or a combination thereof. The motor-driving signal can be produced by modulating a carrier signal with the audio signal and can enable a vibration in the motor for generating the sound. When associated with a mobile platform, the motor can be configured to generate the sound and enable the mobile platform to move. Advantageously, without installing separate audio system hardware, the mobile platform thereby is capable of conveying information that is audible and comprehensible to a human. Communication efficiency between the human and the mobile platform can thus be improved.

Abstract: A gimbal photographing device includes a body having a supporting wall, a folding mechanism connected to the body, and a gimbal camera connected to the folding mechanism. The gimbal camera attaches to the body through the folding mechanism and has an expanded state and a folded state. The supporting wall is configured to support the folding mechanism and the gimbal camera. The folding mechanism includes a supporting base and a position limiting member. The supporting base is connected to the gimbal camera and rotatably connected to the supporting wall around a rotation axis, to drive the gimbal camera to rotate relative to the body, and the rotation axis is parallel to the supporting wall. The position limiting member is connected to the supporting wall along a direction perpendicular to the rotation axis.

Abstract: An encoder includes a code disc and a processor communicatively coupled with the code disc. The code disc is configured to rotate along with a rotating object and includes a plurality of fan teeth extending radially. Each of the fan teeth includes a first line segment, a second line segment, and an arc edge along a circumference of the code disc and connecting the first line segment and the second line segment. The first line segment edges of the fan teeth are arranged at the code disc with equal intervals. A length of the arc edge of one of the fan teeth is different from lengths of other ones of the fan teeth, and the lengths of the other ones of the fan teeth equal each other. The processor is configured to detect a rotation of the code disc to obtain a detection signal, and obtain a rotation parameter of the rotating object based on the detection signal. The rotation parameter includes at least one of a rotation direction, a rotation speed, or a mechanical zero position.

Abstract: A gimbal photographing device includes a machine body, a foldable mechanism connected with the machine body, and a gimbal camera connected with the foldable mechanism. The gimbal camera is configured to cling to the machine body through the foldable mechanism, and is configured to be positioned in an extended state or a folded state. The machine body includes a support wall configured to support the foldable mechanism and the gimbal camera. The foldable mechanism includes a base including a rotation member and a position limiting member connected with the rotation member. The position limiting member is connected with the gimbal camera. The position limiting member includes a first end and a second end that are opposingly disposed. The rotation member is rotatably connected with the support wall around a rotation axis direction to cause the gimbal camera to rotate relative to the machine body.

Abstract: A method for controlling a motor includes obtaining a present electrical parameter of a battery, calculating a compensation amount of a control signal of the motor according to the present electrical parameter, and modifying the control signal according to the compensation amount.

Abstract: A method for processing a throttle control signal includes monitoring a signal transmission state of a throttle signal interface of an electronic speed regulator, determining that the signal transmission state is abnormal, and receiving the throttle control signal via a communication interface of the electronic speed regulator if the signal transmission state is determined to be abnormal.

Abstract: An unmanned aerial vehicle includes a fuselage, a motor mounted at the fuselage, and a control apparatus configured to control the motor. The control apparatus includes one or more processors configured to obtain a present electrical parameter of a battery configured to power the motor, calculate a compensation amount of a control signal of the motor according to the present electrical parameter, and modify the control signal according to the compensation amount.

Abstract: A method for controlling a motor includes obtaining addressing information of an electronic speed governor coupled to the motor, determining a rotation direction of the motor based on the addressing information, and providing a drive signal to the motor according to the rotation direction.

Abstract: A detachable control device includes an operation member, a detachable interface configured to attach the detachable control device to a handle of a gimbal device, a wireless communication circuit, and a controller configured to detect an operation on the operation member, and generate control data according to the operation. The control data includes at least one of gimbal orientation control data for controlling an attitude of a gimbal of the gimbal device or camera function control data for controlling a photographing device mounted at the gimbal to perform a corresponding function. If the detachable control device is not attached to the handle, the controller sends the control data to at least one of the gimbal device or the photographing device through the wireless communication circuit.

Abstract: A gimbal assembly includes a body and a gimbal frame movably connected with the body. The gimbal frame is configured to fittingly contact the body or to be at least partially received in the body to reduce a volume of the gimbal assembly.

Abstract: A multi-rotor UAV includes a frame and a plurality of propulsion systems configured on the frame. Each propulsion system includes a motor and an electronic speed control (ESC) device. The ESC device of each propulsion system includes: a first communication interface; and a processor configured to acquire voltage information at the first communication interface and determine address information of the ESC according to the voltage information. The multi-rotor UAV further includes a controller connected to the first communication interface of the ESC device of each propulsion system. The controller is configured to send a throttle signal to the ESC device of each propulsion system.

Abstract: A control system includes a control device, a plurality of electronic speed controls (ESCs) communicating and sharing status information with each other, and a plurality of motors each coupled to one of the plurality of ESCs. The control device can generate a control signal based on control instructions received by a transceiver. Each of the plurality of ESCs can generate a driving signal based on the control instructions. The plurality of motors can be driven by the driving signal generated by the one of the plurality of ESCs.

Abstract: A microfluidic platform including a microfluidic layer and a contact layer. The microfluidic layer is embedded with a microfluidic structure including a micro-channel and a fluidic sample contained in the micro-channel. The contact layer is able to be attached to the microfluidic layer, and includes a first heater for heating a first area of the microfluidic structure to a first temperature and a second heater for heating a second area of the microfluidic structure to a second temperature. The microfluidic layer and the contact layer rotate together during operation. A method for controlling a sample in the micro-channel of the microfluidic structure.

Abstract: A method for driving an electric motor includes providing two controllers for driving the electric motor. The two controllers use different control methods to drive the electric motor. The method further includes selecting a first controller of the controllers as a primary controller to drive the electric motor and a second controller of the controllers as a secondary controller, monitoring a control of the electric motor, and switching the control of the electric motor from the primary controller to the secondary controller if an error condition is detected in the control of the electric motor.

Abstract: A method of controlling a motor includes determining a first motor controlling parameter measurement based on a signal received from a position sensor, determining a second motor controlling parameter based on one or more motor electrical parameters, and controlling operation of the motor based on at least one of the first motor controlling parameter measurement or the second motor controlling parameter measurement.

Abstract: A method for controlling an electric speed controller includes receiving an addressing instruction from a flight controller. The addressing instruction is used for addressing the electric speed controller with a target addressing number. The method further includes determining whether a throttle characteristic signal is received, and, if the throttle characteristic signal is received, sending a feedback signal for responding to the addressing instruction and recording the target addressing number according to the addressing instruction.