60results about How to "Does not affect control" patented technology

The invention discloses a WiFi access resource sharing method. According to the method, a resource user presents a resource using application to a resource management platform through a resource sharing client side on a user terminal, the resource management platform searches for usable resources from a WiFi resource information base saved by the resource management platform according to the WiFi resource information of the position of the user terminal and sends encrypted resource logging information to the resource sharing client side, and the client side achieves safe logging onto a target resource by means of encrypted logging information. In this way, each WiFi access resource owner can provide the resources for other people on the premise that WiFi resource safety and control power are guaranteed, and then full utilization of the WiFi access resources is achieved. The invention further discloses a WiFi access resource sharing system.

The invention specifically relates to a method and a device for distinguishing a double-three-phase motor parameter on line on a harmonic plane, and belongs to the field of mechanical and electrical technology. The method provided by the invention comprises the following steps of carrying out coordinate transformation on collected phase current in a motor vector control system to obtain the feedback current of a fundamental wave plane and a harmonic plane; according to the feedback current of the fundamental wave plane, calculating the reference voltage of the fundamental wave plane and the reference current of the harmonic plane; according to the error of the reference current and the feedback current of the harmonic plane, calculating stator resistance, stator leakage inductance and the reference voltage of the harmonic plane; according to the reference voltage of the fundamental wave plane and the harmonic plane, calculating the reference voltage of two sets of windings, i.e. ABC and UVW; and finally, according to a three-phase PWM (pulse-width modulation) strategy, calculating the conduction state and time of an inverter switching tube, and driving the motor to operate. The invention has the advantages of high distinguishing accuracy, quickness in convergence, simple algorithm and device and easiness in realizing, and a distinguishing result does not depend on other motor parameters.

The invention relates to a wire arrangement type intelligent home integrated control device based on a cloud service platform. The wire arrangement type intelligent home integrated control device based on the cloud service platform mainly comprises two large parts of the cloud service platform and an intelligent home integrated controller. The cloud service platform and the intelligent home integrated controller are in communicating connection through an Ethernet. The cloud service platform is connected with a networking device. A relay control port, an infrared control port, a wireless control port, a key switch detection port, a touch signal detection port and a radio station (RS) 485 communicating port are arranged on the intelligent home integrated controller. The networking device comprises an intelligent mobile phone, a handheld device, a tablet personal computer and a personal computer. The intelligent mobile phone is connected with the cloud service platform in a mode of general packet radio service (GPRS) or wireless fidelity (WiFi). The handheld device and the tablet personal computer are connected with the cloud service platform in a mode of WiFi. The personal computer is connected with the cloud service platform in a mode of the Ethernet. The device has the advantages of being steady, reliable, long in service life and low in price.

The invention discloses a motor servo system additivity fault detection and fault tolerant control method based on a slip form. The method includes building a motor servo system mathematical model containing additivity fault description, designing a slip form disturbance observer to observe additivity fault level and demonstrate observation accuracy, designing an initiative fault tolerant controller according to the observed additivity fault, and demonstrating system overall gradual stability according to the Lyapunov nonlinear stability principle. By means of the control method, the reasonable fault tolerance degree can be set to ensure that effects caused by various model uncertainties are kept in the designed fault tolerance range all the time when the system has no fault, false alarming of the system is avoided, and fault detection robustness is improved. The additivity fault level of the system can be observed on line, real-time performance of additivity fault detection is guaranteed while system control performance is not affected, active detection missing and fault tolerant control of minor faults can be achieved, and timely warning of severe faults is also achieved.

The invention belongs to the technical field of digital micro-fluidics, and in particular relates to a liquid drop mixing unit based on an electro-wetting digital micro-fluid chip. The mixing unit comprises three parts consisting of an inlet zone, a mixing zone and an outlet zone; the fast, high-efficiency, automatic and reliable mixing of the liquid drops can be realized via the special bidirectional driving electrode and closed-loop electrode arrangement and simplified electrode connection mode. The liquid drop mixing unit has the advantages of novel design, easiness in control, high reliability, excellent practicability, high automation degree, and the like, so that the liquid drop mixing unit can be widely used in various digital micro-fluid chips.

The invention relates to the technical field of riot control and fire control and discloses a bone conduction type wireless communication helmet. The bone conduction type wireless communication helmet comprises a safety helmet body and a removable talkback equipment rear cover and further comprises an earphone device and a microphone device. The earphone device comprises a bone conduction type earphone and a self-adhesive fixing band. The microphone device comprises a bone conduction type microphone. A vent hole, first connection cloth, an inflatable air bag and a fixing piece are arranged on the bone conduction type microphone, wherein the fixing piece is connected with the bone conduction type microphone. An electric wire clamp is arranged on the fixing piece. The bone conduction type wireless communication helmet is suitable for the public security department, the fire control department, the army, the city management department, the civil air deference department, the industry department and the like, is applied to disaster relief and emergency rescue, and is a full-digital communication device. The bone conduction type wireless communication helmet is characterized by comprising the removable talkback equipment rear cover, and the removable talkback equipment rear cover is suitable for helmets of different specifications and capable of being widely applied to the fields of fire control, riot control and the like. A bone conduction type microphone unit is arranged in the helmet and is excellent in anti-noise performance, is convenient to install and does not influence the comfort level of a helmet wearer or safety.

The invention relates to the magnetic material detection field, in particular to an apparatus and a method for monitoring a demagnetization state of a permanent magnet of a permanent magnet motor. The apparatus for monitoring the demagnetization state of the permanent magnet of the permanent magnet motor comprises a battery (1), an inverter (2) and a permanent magnet motor (5), and is characterized by also comprising a U phase current sensor (31), a V phase current sensor (32), a speed sensor (6) and a microprocessor (7), a U phase line and a V phase line are respectively connected with a phase current sensor in series, the speed sensor (6) is connected on the permanent magnet motor (5) in parallel, and the U phase current sensor (31), the V phase current sensor (32) and the speed sensor (6) are all connected with the microprocessor (7) by leads. The invention can accurately and rapidly detect performances of the permanent magnet, and does not influence the control performances of the system.

The invention discloses a three-redundancy server controller achieving power amplification unit fault absorption. The servo controller is applied to a high-reliability new-generation carrier rocket servo system and a guided missile series servo system. On the basis of data communication among three sub-controllers, information interaction and sharing are achieved, and the technic basis is provided for achieving fault absorption of a power amplification unit. Three-redundancy servo valve current signals are collected through a three-way analog-to-digital conversion unit and input to three CPU control units for current monitoring. When one way of power amplification unit has a one-degree fault, the output current of two ways of normal power amplification units is adjusted by adjusting the voltage output of three operational amplifier circuit output ends so as to compensate for the current output of a fault channel. According to the method, one-degree fault absorption of the power amplification units is achieved, the purpose of precisely controlling a three-redundancy servo valve is achieved during one-degree fault of the power amplification units, and when a partial functional circuit has a two-degree fault, the fault absorption function is achieved, and the reliability of the three-redundancy servo controller is improved.

An induction motor high speed control method for weak magnetic operation of a voltage expansion region belongs to the motor control technology field, and is aimed at solving the problems of a conventional induction motor high speed weak magnetic control method that the dynamic performance of voltage closed loop weak magnetic control is poor in a voltage expansion region and the utilization rate of DC bus voltage is low. The method includes the following steps: setting a voltage adjusting parameter kext, and obtaining a weak magnetic factor after the voltage adjusting parameter is processed by a voltage given adjustable weak magnetic controller; carrying out calculation and obtaining a torque component amplitude limit initial value; through processing of the rotating speed of a given rotor and the rotating speed of an actual rotor, obtaining a q-axis given voltage value and a d-axis given voltage value; controlling an induction motor by a self-limiting module in a transition section, and then making the inductor motor enter a first weak magnetic region; and in a second weak magnetic region, enabling output |usd| to be stabilized to be equal to an expression shown in the description through PI adjusting until the rotating speed of the rotor reaches a given value. The induction motor high speed control method is used for weak magnetic operation control of a voltage expansion region of an induction motor.

The present invention discloses a method for enabling fan board modules to be easily pluggable on basis of a blade server, and belongs to maintenance methods of fan modules. The present invention aims at solving the technical problem that a fan control tray is not easy to disassemble and maintain due to the fan control tray is integrated with a plurality of fan modules. The method according to the technical scheme structurally comprises the flowing steps of (1) first, disassembling a fan tray into fan board modules corresponding to a plurality of nodes, the fan board module group being controlled by another individual fan control backboard; (2) then, connecting the fan board modules of each group of calculating nodes to a computing board through the fan control backboard in the step (1); and (3) controlling the fan boards by a control chip on the fan control backboard through IO signals, disposing LED lamps to display fan status, and transmitting information with a system management board SMC through an I2C bus, rotation speeds of the fans being controlled by6 the SMC.

The invention discloses an AVRCP (audio video remote control profile) instruction allocation method and system based on device types. The method comprises steps as follows: a mobile terminal acquires the type of a device sending an AVRCP instruction and judges whether the device sending the AVRCP instruction is a type of vehicle-mounted device when receiving the AVRCP instruction; the mobile terminal allocates the AVRCP instruction to a designated application when detecting that the device sending the AVRCP instruction is the type of vehicle-mounted device; the mobile terminal allocates the AVRCP instruction according to a preset AVRCP instruction allocation principle when detecting that the device sending the AVRCP instruction is not the type of vehicle-mounted device. The mobile terminal can distinguish the vehicle-mounted device when receiving the Bluetooth AVRCP instruction, so that the AVRCP instruction of the vehicle-mounted device is only allocated to the specific application, AVRCP control of other Bluetooth devices on the mobile terminal is not affected, and the response speed of the mobile terminal for specific applications of Bluetooth vehicle-mounted control.

The invention discloses a method and device for updating a program white list knowledge base. The method comprises the following steps of detecting whether an operation of running an installation program is generated in a system or not; if the operation of running the installation program is detected, establishing a process parent-child relationship tree of the installation program and a temporaryprogram white list; executing the installation program in the temporary program white list; judging whether a new file generated in the execution process of the installation program belongs to a process parent-child relationship tree or not; if the new file belongs to the process parent-child relationship tree, storing the file into a temporary program white list; and updating a preset program white list knowledge base according to the temporary program white list. According to the method, the control of the program white list knowledge base on the industrial control system is not affected inthe installation and updating process of the installation program, the program white list knowledge base can be automatically updated in the installation and updating process of the installation program, the installation program is similar to common program installation, and no excessive manual intervention is needed.

The invention discloses a double-groove silicon carbide MOSFET structure and a manufacturing method. The structure is formed by arranging a plurality of cells, wherein each cell is provided with a substrate and a drift layer; each drift layer is provided with a gate trench and a source trench, an N-type hole barrier layer and a P+ type shielding layer are arranged around the source trench, and source metal is formed in the source trench; a P- type base region is formed at the tops of each drift layer and each N-type hole blocking layer, N+ type source regions are formed at the tops of the P- type base regions and the P+ type shielding layers, and ohmic contact metal layers are arranged between the N+ type source regions and source electrode metal; gate thermal oxidation dielectric layers are formed on the bottom surfaces, the inner side surfaces and the like of the gate trenchs, the gate thermal oxidation dielectric layers are cavity-shaped, and gate precipitation dielectric layers and gate electrodes are formed in the cavities; and interlayer mediums are arranged between the gate electrodes and the source electrode metal. According to the above structure, the reliability of a gate dielectric layer of the device can be improved, and on-resistance is reduced, so on-static loss is reduced, gate-drain capacitance and gate charge are reduced, and the dynamic loss of a switch is reduced.

The invention discloses a method for suppressing the fluctuation of a bus voltage of an electrolytic capacitor-free frequency converter based on a neural network. The method comprises the following steps: firstly, a q-axis current expression is solved according to a power balance equation; a d-axis current control strategy is formulated according to a relationship that a voltage of a motor cannot be higher than a voltage which can be provided by an inverter; secondly, segmented logic is used, and a dynamic reference speed is given according to whether the bus voltage exceeds a threshold value or not; and finally, the BP neural network is built, the value of the fluctuation of the bus voltage serves as a performance index, dynamic reference speeds given by the segmented logic under different threshold values are subjected to data optimization, the neural network is trained to output the optimal dynamic reference speed, and the fluctuation of the bus voltage is suppressed. On the basis of a traditional electrolytic capacitor-free frequency converter, the output power is regulated in real time through the dynamic reference speed, so that the fluctuation of the bus voltage is suppressed; a dynamic reference speed generating method and a motor control method are relatively independent; and the method has the advantages of being high in universality, transplantable, constant in topological structure and high in reliability.

The invention provides a communication method among Views in an Android system. The communication method comprises the following steps: 1) defining a View message ID (Identity) corresponding to the View, and adopting a way that relevant data is attached to the View message ID to construct a View message; 2) constructing a corresponding Hash table of the View message and a View entity to realize the registration of the View message in the View, and logging off all View messages registered by the View in the Hash table when the View is removed from an interface; and 3) creating a processing thread, and adopting the processing thread to process the View message. The complexity and the redundancy of Activity are lightened, the function development and expansion of the View can be effectively enhanced, and the control of the View by the Activity is not affected.

The invention discloses an automatic watering device for a drinking trough for pig breeding, which comprises a drinking trough, a pillar, a slide rail and a slider. The drinking trough is provided with several pillars, and the left wall of the inner cavity of the drinking trough is provided with a slide The right side wall of the slide rail is provided with a slider, the bottom of the slider is provided with a buoyancy plate, the left side wall of the drinking tank is connected with an external water pipe, and the outer wall of the external water pipe is plugged with a solenoid valve. The present invention moves up and down through the slider driven by the buoyancy plate, so as to open and close the water outlet, control the amount of water, realize automatic control, and realize the switch of the solenoid valve by driving the spring stretch switch through the slider without adding intelligence. The equipment realizes the automatic opening and closing of the water flow, saves costs, is simple and fast to operate, and is integrated in operation. By setting up several pillars in the drinking tank, it can effectively prevent the pigs from damaging the equipment, and at the same time, it does not affect the control of the water volume. It is more practical , suitable for widespread promotion and use.

The embodiment of the invention discloses a dual-motor synchronization control method, system and a computer readable storage medium, which relate to the technical field of industrial control. Synchronization control of dual motors is realized through adopting a control algorithm combining position prediction synchronization and torque synchronization control, the problem of position deviation ofthe dual motors caused by data transmission delay can be avoided, the torque balance of the dual motors can be kept in a position synchronization process, and the problem of uneven force of a mechanical device can thus be avoided; in addition, in comparison with the existing mode of realizing position synchronization control on dual motors through frequency division, a high-speed IO or a hardwarecircuit does not need to be added, and external interference does not happen; in comparison with the existing mode of realizing position synchronization control on dual motors through a high-performance PLC, no high-performance PLC is needed, the cost and the complexity of the synchronization control system are reduced, and the control performance of a simple PLC communicating with the dual-motorsynchronization control system is not affected.

The invention provides a distributed control method for unbalanced voltage compensation of an island alternating-current micro-grid without continuous communication, and solves the problem that voltage imbalance may occur in an alternating-current micro-grid system due to unbalanced load connection in a sensitive load bus (SLB). A new distributed control strategy provided by the invention is used for realizing unbalanced voltage compensation among distributed power generation units in the island alternating current micro-grid with limited discontinuous communication, a two-layer control framework is adopted and comprises a network layer and a main control layer, and the provided control strategy applied to the network layer realizes event-triggered communication, so that the communication efficiency is improved. Therefore, the unbalanced voltage in the SLB can be effectively compensated. Compared with a centralized control strategy, the provided control strategy is completely distributed, and information exchange between the DG units is only carried out when an event is triggered. The result is that the communication burden can be significantly reduced without affecting the control performance.

The invention provides a microgrid voltage unbalance compensation method based on a Gossip communication algorithm and belongs to the technical field of microgrid control. The method is implemented through two control layers. Primary control achieves unbalance current balancing control of different DRs and plug-and-play functions of the DRs by using uses a local controller and a Gossip algorithm. Secondary control achieves microgrid voltage unbalance degree requirements by means of an integrated controller. The method solves a problem that power quality is difficult to be simultaneously solved with unbalance current balancing, is difficult to be compatible with a current source control mode DR, and is low in flexibility in a conventional unbalance compensation method.

The invention discloses a bone conduction fire fighting helmet which comprises a helmet body and a mask, wherein the mask is connected to the front end of the helmet body, a visual window is arranged on the mask, a fixing ring is arranged inside the helmet body, and a bone conduction earphone is pasted to the fixing ring by a hook-and-loop fastener; a bone conduction vibrator is arranged at the end part of the bone conduction earphone, and the outside of the bone conduction vibrator is wrapped with a shell; the bone conduction vibrator comprises a metal sheet, piezoelectric ceramic pieces are attached to the two end surfaces of the metal sheet respectively, the polarities of the piezoelectric ceramic pieces are opposite, and plastic layers are arranged on the surfaces of the piezoelectric ceramic pieces; a microphone is arranged on the helmet in the position corresponding to the mouth part of a user. According to the bone conduction fire fighting helmet, the structure is reasonable, the mounting is convenient, the bone conduction earphone is not required to be inserted into the ear, control of the spot is not affected while the earphone is used, clear conversation of communication under the high-noise environment is realized, a rescue worker can receive the command timely, rescue work can be performed effectively, and the purpose of high noise resistance is realized.

The invention discloses a PE ball core automatic polishing system based on torque control and a control method. The invention solves the problem that PE ball core polishing equipment in the prior artis complex in structure, high in operating demand and narrow in applicability. The system comprises a supporting frame, wherein a ball core rotating mechanism that clamps a PE ball core is arranged inthe supporting frame, and a two-degree-of-freedom moving mechanism is arranged on the upper part of the supporting frame; the two-degree-of-freedom moving mechanism comprises a first moving assemblyand a second moving assembly, and the first moving assembly is slidably arranged on the supporting frame through a ball core positioning mechanism; a polishing mechanism is arranged on the second moving assembly and comprises a polishing cloth wheel, and the polishing cloth wheel performs a circular motion along the surface of the PE ball core. Polishing is performed according to a sequence of ball core clamping, ball core positioning, parameter setting, ball core polishing and stopping resetting. The system polishes the PE ball core automatically, is easy to operate, is low in demand on operating experience and technical level of an operator and wide in application range, and ensures high polishing precision.

The invention relates to the technical field of oil field drilling development, and particularly relates to a continuous axial impact rock breaking hammer. A bearing shaft is arranged in the upper end of a shell of the device; the upper end of the bearing shaft is sleeved with a stator upper top ring; the stator upper top ring is fixed to the inner wall of the shell; the middle of the bearing shaft is sleeved with a rotor locking nut; the rotor locking nut and the bearing shaft are sealed; and a bearing is arranged at the lower end of the rotor locking nut in series and arranged on the bearing shaft in a sleeving manner. On the premise that borehole track control is not affected, the rock breaking efficiency of various drill bits can be improved, the structure is reasonable, the overall length is small, borehole track control is not affected, controllable pressure pulse waves can be generated, the frequency is high, high-frequency impact on the drill bits can be achieved, the hammer is directly connected with the drill bits, impact force directly acts on drill bit bodies, no energy loss exists in the middle, the impact force can be adjusted, the service life of the whole hammer is long, no quick-wear part exists, the continuous work time is long, reliability is high, and installation is convenient.

The invention discloses an AlGaAs / GaAs high-electron-mobility transistor with a multi-channel laminated insulation side gate fin type structure. The AlGaAs / GaAs high-electron-mobility transistor sequentially comprises a GaAs or germanium substrate, a plurality of layers of AlGaAs / GaAs heterojunctions, a GaAs cap layer, a SiN passivation layer, a source electrode, a drain electrode and a gate electrode from bottom to top, wherein the gate fin adopts a laminated structure with different fin widths at the upper and lower layers, the fin width of the upper layer being smaller than that of the lower layer; and an insulating dielectric layer is arranged between the gate electrode and the side walls of the plurality of layers of AlGaAs / GaAs heterojunctions. The high-electron-mobility transistor provided by the invention adopts a three-dimensional laminated fin type structure, so that gate regions with different fin widths perform composite control on a device channel, which is equivalent to parallel connection of devices with different threshold values; when gate voltage is applied, transconductance performance of the device is widened and linear working characteristics are improved; theinsulating dielectric layer is introduced into the side wall of the gate fin, so that the leakage current introduced by the side gate etching surface of the fin type structure is effectively reduced,the static power consumption of the device is reduced, and the breakdown voltage of the device is improved.

The invention discloses a slicing architecture of an ad-hoc self-organizing network and a construction method of the slicing architecture. The slicing architecture comprises a command node and a plurality of common nodes, wherein the command node and each common node are connected in an ad-hoc network mode, and a completely distributed or distributed multi-center structure is adopted to ensure thecommunication of regional nodes, realize the network topology and form a coverage plane of the ad-hoc network; the command nodes are used for dynamically selecting part of common nodes to construct acontrol plane according to a control instruction distribution demand and a data return demand, dynamically selecting part of common nodes to construct a task plane, and transmitting a control instruction to each node in the task plane through the management and control plane to perform task distribution or preset task starting rule setting. Control and routing processing are not affected by a large amount of data processing, control and management are not affected by complex routing processing, and system safety and stability are highly ensured.

The invention relates to the technical field of material drying, and discloses a high-voltage electric field heat pump drying system. The high-voltage electric field heat pump drying system comprises a heat pump system, and the heat pump system comprises a condenser and an evaporator. A drying chamber and a high-voltage electric field drying mechanism are further included. The drying chamber, the evaporator and the condenser are sequentially connected into a closed loop through a circulating air path, a drying medium is introduced into the circulating air path, and a high-voltage electric field drying mechanism is arranged in the drying chamber. According to the high-voltage electric field heat pump drying system, the heat pump drying technology and the high-voltage electric field drying technology are ingeniously coupled, the cost is low, the energy-saving effect is good, high-efficiency and high-quality drying treatment can be carried out on materials in a low-temperature state, and the drying requirement for raw materials containing thermal instability active components can be well met.

The invention discloses an animal husbandry intelligent management system based on machine vision analysis. The system comprises an animal husbandry management system, a monitoring subsystem, an embedded intelligent analysis subsystem, a feedstuff management subsystem and a livestock house management subsystem, wherein the animal husbandry management system is used for receiving information transmitted by the subsystems to control the subsystems; the monitoring subsystem is used for monitoring feedstuff channels and livestock house environments and providing clear video data for the embedded intelligent analysis subsystem; the embedded intelligent analysis subsystem is used for detecting the video data collected by the monitoring subsystem according to the setting information of areas to be detected to obtain a feedstuff detecting area and a dung channel detecting area; the feedstuff management subsystem is used for managing feedstuff in a feedstuff channel according to instructions of the animal husbandry management system; the livestock house management subsystem is used for managing livestock houses according to instructions of the animal husbandry management system. The animal husbandry intelligent management system based on the machine vision analysis has the advantages of intelligentized control, stable performance and lower management cost.

The invention relates to a real-time excitation recording system, including an excitation real-time oscillography tool and an excitation record and playback tool. The excitation real-time oscillography tool is used for timely obtaining and processing recording data messages to obtain recording data of each sampling channel and carrying out oscillography and storage. The excitation record and playback tool is used for guiding in, playing back and analyzing the recording data. The real time collection capacity of an excitation controller is used as a data source, and by a network communication mode, the excitation real-time oscillography tool is used for completing extraction, connection and storage of data of each channel, and thus requirements for long-term real-time data recording are met, and control performances of the excitation controller cannot be influenced.

The invention provides a flapping door unit transmission mechanism and a flapping door unit, belongs to the field of access control, automatic ticket checking equipment and rail transit equipment. Theflapping door unit transmission mechanism is used in the flapping door unit, the flapping door unit includes a motor and a flapping door rotating shaft, and the transmission mechanism includes a drive synchronous pulley, a synchronous belt and a driven synchronous pulley. The drive synchronous pulley, the driven synchronous pulley and the synchronous belt are horizontally disposed. The axis of the drive synchronous pulley and the axis of the driven synchronous pulley are both perpendicular to the horizontal plane. The drive synchronous pulley and the driven synchronous pulley perform synchronous transmission through the synchronous belt, and the torque of a main shaft of the motor is transmitted to the flapping door rotating shaft. By using the flapping door unit transmission mechanism and the flapping door unit, the precision of the movement and braking of a flapping door is improved, the installation space is greatly saved, the cost of a gate machine is reduced, and the maintenancetime and labor cost are saved.

The invention provides a charging box body which is used in cooperation with a wireless earphone. The wireless earphone comprises an earphone main body and an earphone side magnetic part; the charging box body comprises a box body power supply, a single-pole Hall switch and a box body side magnetic part, wherein a first magnetic pole of the earphone side magnetic part can be magnetically attracted to a second magnetic pole of the box body side magnetic part; the single-pole Hall switch is electrically connected to the box body power supply, the single-pole Hall switch is used for sensing a first magnetic pole of the earphone side magnetic part, the first magnetic pole of the box body side magnetic part is provided with a magnetic field coverage area which can be covered by a magnetic field, and the single-pole Hall switch avoids the magnetic field coverage area; when the first magnetic pole of the earphone side magnetic piece is sensed, the box body power supply is in a turn-on state, and the box body power supply can charge the earphone main body in the turn-on state. The charging box body can achieve the automatic alignment of the wireless earphone through the box body side magnetic part, and can achieve the starting of the power supply of the box body through the single-pole Hall switch just through the approaching of the wireless earphone.