652 results about "Direct control" patented technology

System, methods, and other embodiments described herein relate to transferring automatic control of a vehicle through emulating virtual markings and estimating a buffer zone. In one embodiment, a method includes estimating a position for a takeover by a vehicle that is directly controlling driving maneuvers. The method also includes predicting an automated region from a transition time and the position for the takeover by an operator. The method also includes generating virtual markings for the takeover using the automated region and the position, wherein the virtual markings exist within the automated region and the position indicates an area for manual feedback to the vehicle.

The invention discloses a non-contact power supply three-stage control system based on series redundancy, and belongs to the field of non-contact power supply control. Comprising a power correction module, a voltage conversion module, a full-bridge inversion module, a cooperative control module, an analysis adjustment module, a monitoring switching module, a simulation maintenance module, a communication security module, a remote interaction module, an energy efficiency optimization module and a diagnosis recording module. High conversion efficiency can be dynamically kept under different loads and working conditions, energy loss is reduced, electric energy quality is remarkably improved, damage and misoperation under abnormal working conditions are prevented, high-reliability continuous power supply is achieved, PID parameters can be dynamically adjusted or direct control quantity can be generated, the system adapts to complex and changeable operating environments, and failure rate and shutdown loss are reduced.

The invention discloses an intelligent layering and guiding device for highway tunnel fire smoke and a control method, and relates to the technical field of tunnel fire safety, a smoke flow Froude number is introduced as a direct control target, the parameter represents the ratio of smoke flow inertia force to buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that inertia force is relatively insufficient, the buoyancy effect is dominant, and instability and entrainment are likely to happen to an interface between a smoke layer and lower cold air, and then according to a control algorithm, the smoke layer and the lower cold air are controlled. The micro jet fan applies directional inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and sedimentation caused by flow state instability are prevented.

The application discloses a raw material sampling device for photoresist production and relates to the photoresist production field.The raw material sampling device comprises a bottom plate and a storage box fixedly installed on one side of the top of the bottom plate.In the sampling process, the driving motor drives the first crank through the belt transmission member, the first push rod is prompted to perform the circular motion, and then the first driving block is driven to slide, the mechanism ensures the swing of the swing rod, thereby causing the reverse force of the second driving block, the second crank is also moved, the rotating rod transmits the force to the sliding block, and the swing of the movable rod is caused, the movement directly controls the movement of the second fixed rod and the sampling member, the sampling tube can be accurately cut into the inside of the sample storage box, stable and consistent sampling is realized, sampling is carried out under the same standard and condition each time, the consistency of the sampling amount is ensured, the reliability of data is improved, and in addition, the automatic sampling process in the closed environment maximally reduces the external pollution risk.

An imprinting apparatus comprises a first carrier for carrying a flexible stamp and a second carrier movable relative to the first carrier and configured to carry a substrate having a resist layer. The second carrier comprises a chuck and a set of chuck actuators for translating a portion of the chuck in a Z-axis direction. Each chuck actuator comprises an actuator output and a lever arrangement between the actuator output and a chuck drive member. The lever arrangement enables an increase in positioning accuracy and increased stiffness, compared to the direct control of position using the actuator output.

The invention discloses a cloud edge collaborative information interaction processing device, method and system with an endogenous security architecture. The equipment comprises a main processor, a hardware security chip, a programmable logic unit, a communication unit and an equipment management unit. A trusted execution environment is constructed in the hardware security chip and is in isolated communication with a common execution environment of the main processor through a security bus, a security computing engine, a remote attestation module and a trusted key warehouse are arranged in the trusted execution environment, and the programmable logic unit is directly controlled by the trusted execution environment to realize dynamic hardware acceleration. The communication unit is provided with independent interfaces which are connected with the two execution environments respectively, unification of hardware-level security isolation and efficient cooperative computing is achieved, and the problems of privacy disclosure and untrusted process in cloud edge collaboration are solved.

The invention discloses a method and a system for controlling an eUICC to write an eSIM configuration file through Bluetooth, the method and the system are applied to interaction between a mobile terminal and an external Bluetooth SIM, and the method comprises the following steps: the mobile terminal is connected with an external Bluetooth SIM card through a BLE communication protocol; the external Bluetooth SIM card is inserted into a physical SIM card slot of any mobile device; the mobile terminal sends eSIM configuration file data or a downloading instruction to the Bluetooth SIM card; the Bluetooth SIM card converts the configuration file into an APDU instruction and writes the APDU instruction into a built-in eUICC chip; and the eUICC chip returns state information to the mobile terminal after completing configuration activation. According to the method, an eSIM configuration writing scheme which does not need operating system authority and can be deployed in a cross-platform mode is adopted, an eUICC chip is directly controlled through a central control MCU of an external Bluetooth SIM card module, Profile writing and activation are achieved, and the method supports use of Android, iOS and other Bluetooth devices.

The invention relates to the technical field of power electronics and electric energy quality management, in particular to a TNPC-UPQC multi-target finite set prediction control method and system based on midpoint potential self-balancing, and the method comprises the steps: building a parallel side current prediction model based on a KVL equation, and building a series side voltage prediction model based on a voltage compensation relation; constructing a direct-current side total voltage prediction model based on a power balance principle, and constructing a neutral-point potential prediction model by accurately calculating a neutral-point current; the method comprises the following steps: constructing a model multi-objective cost function, determining cost function values corresponding to various switching states of the converter by adopting the multi-objective cost function, selecting an optimal switching state which enables the cost function to be minimum, applying the optimal switching state to the converter, and directly controlling the on and off of a corresponding power switching device. In order to dynamically coordinate the priority of each target under different working conditions, a self-adaptive inertia weight adjustment algorithm is introduced, and the algorithm can effectively balance the global search capability and the local search capability.

The invention provides a multi-task scheduling method and system of a safety controller. Belongs to the technical field of industrial automation control. According to the method, aiming at a multiple redundancy safety controller, under the environment of not depending on a universal operating system, an external hardware synchronous clock is introduced to send a unified interrupt signal to each system of CPU, so that microsecond-level redundancy synchronous operation is realized; dividing a CPU control period into a basic function task and a plurality of user control tasks by adopting a static time slice rotation strategy; a counter in an interrupt service program is used for directly controlling task switching, and a complex scheduling algorithm is not needed; and meanwhile, through a data processing mechanism of memory partitioning and'centralized carrying-independent execution ', the inter-task data consistency without mutual exclusion locks is realized. According to the method, the problems of dependence on an expensive and safe operating system, difficulty in multi-system synchronization, deadlock risk and the like in the prior art are solved, and the minimum 5ms control period is realized while the cost is greatly reduced.

The invention relates to the technical field of fire extinguishing equipment, in particular to a new energy automobile battery pack internal fire extinguishing device. Comprising a remote-control crawler trolley and an auxiliary assembly, the auxiliary assembly comprises a frame body, a multi-stage telescopic air cylinder, a limiting disc, a puncture spray head, an electromagnetic component, an air cylinder, a fixing component, an air inlet component and a water inlet component, and an operator can directly control the remote-control crawler trolley to move to the bottom of a train body 10 meters away from the train or more away from the train through a handheld terminal; the multi-stage telescopic air cylinder is controlled to act to push the puncture nozzle to ascend, the puncture nozzle can pierce into the power battery pack, meanwhile, the limiting disc is matched to prevent the puncture nozzle from piercing the upper side of the battery pack, and then fire extinguishing water flow is conveyed into the puncture nozzle, so that fire extinguishing and cooling of the interior of the battery can be achieved; and therefore, fire extinguishing can be carried out without jacking the vehicle by virtue of a jacking device when fire extinguishing is carried out on the battery packs of most new energy vehicles, and meanwhile, the fire extinguishing safety of operators can be improved.

The invention discloses a current source type PWM rectifier control method under a power grid imbalance working condition, and the method comprises the steps: firstly designing a current source type PWM rectifier and a corresponding control system, carrying out the small-signal linearization modeling of the circuit topology of the control system, and building an open-loop transfer function of the control system; secondly, providing a direct current side direct control strategy which does not need a complex phase-locked loop and positive and negative sequence calculation; finally, a modulation strategy for the current source type PWM rectifier is designed, and the modulation performance of the control system is further improved. The novel control method is provided for the current source type PWM rectifier under the unbalanced power grid, compared with a traditional double-closed-loop control strategy, the THD value of the control method is obviously reduced, and the control method has the advantages of being high in power factor, low in input current harmonic wave and the like.

The invention belongs to the technical field of wireless communication, and discloses a dispatching information sending method of a bird repelling command and monitoring system based on millimeter waves, and the dispatching information sending method of the bird repelling command and monitoring system based on the millimeter waves comprises the following specific steps: S1, establishing a millimeter wave communication topological structure and node capability mapping; s2, generating a task priority identifier and a bird repelling demand model; s3, executing channel state sensing and available path prediction; s4, executing beam directional control and path construction; s5, executing a frequency spectrum and time slot joint scheduling strategy; s6, scheduling information packaging and link-level forwarding; and S7, the bird repelling module responds to the instruction and feeds back the instruction. According to the invention, by constructing a task priority driven scheduling mechanism, the problems of scheduling congestion and resource waste caused by task indifference processing in a traditional bird repelling system are effectively solved; by introducing a priority weighting function and a task level mapping mode, the system can dynamically judge a task processing sequence when facing a plurality of concurrent bird repelling tasks.

The invention discloses an intelligent closed-loop control system and method for dosing in a water plant. An integrated sensing unit of the system is used for synchronously acquiring an electrochemical impedance spectrum signal reflecting a floc coagulation state and a fluid entropy change signal reflecting mixed energy efficiency in situ; the control unit is used for extracting dielectric characteristic parameters and entropy yield parameters from the signals, inputting the dielectric characteristic parameters and the entropy yield parameters into a neural network model trained through reinforcement learning to generate a dosing control instruction, and can adaptively switch among a direct control mode, an online self-calibration mode and a safety keeping mode based on the entropy yield change rate or the signal quality; and the execution unit is used for executing the instruction to adjust the dosage. By directly sensing the micro state of the coagulation process and utilizing the intelligent model to make a decision in real time, the problems of lagging and strong model dependence of a traditional control mode are solved, second-level real-time accurate regulation and control are realized, the medicine consumption and the energy consumption are remarkably reduced, and the adaptability and the reliability of the system under complex working conditions are improved.

The invention discloses a truss-like structure cross-scale topological optimization method based on data driving, and belongs to the technical field of structure topological optimization design. The method comprises the following steps: firstly, constructing a truss-like unit cell topological structure database with high bearing efficiency through a self-evolution sampling strategy; then, a topological decoder neural network is constructed, a high-dimensional discrete topological space is mapped into a low-dimensional continuous and differentiable design space, and direct control over a unit cell boundary connection mode is achieved; meanwhile, constructing a unit cell equivalent mechanical performance predictor by utilizing a graph convolutional network to replace time-consuming numerical value homogenization analysis; and finally, integrating the components into a gradient-based multi-material topological optimization framework to realize synchronous concurrent optimization of a macroscopic topological layout and various microcosmic unit cell geometric structures. According to the method, the problems that the design space is discrete, the boundary connection compatibility is difficult to guarantee and the calculation efficiency is low are solved, the optimization precision is guaranteed, and the efficiency of multi-scale topological optimization and the global optimization capability are remarkably improved.

The invention discloses an active dynamic balance control method and system for a tower crane, and the method comprises the steps: monitoring the vertical state of a tower body or the horizontal state of a working arm in real time, and obtaining an actual posture value; comparing the actual attitude value with a preset standard attitude value, and judging attitude deviation and direction; according to the deviation direction, a balance weight executing mechanism on the balance arm side is directly driven to act so as to change the balance torque, and the specific value of the needed torque is not calculated in advance in the adjusting process; and real-time monitoring is continuously carried out while adjustment is carried out until the attitude deviation is eliminated, and closed-loop control with the vertical tower body as a direct control target is formed. Through attitude feedback closed-loop control, any unbalance disturbance including inertia force can be sensed in real time and directly corrected, the tower body alternating bending moment is fundamentally eliminated, the foundation of tower body shaking is eradicated, the service life of a tower crane is remarkably prolonged, and meanwhile the structure of a control system is simplified.

The invention discloses a fruit conveying anti-blocking mechanism based on a neural network and a control method. The mechanism comprises a conveying channel, a disturbance disc connected with a motor through a universal joint, a touch sensing array and a gravity self-adaptive floating assembly. According to the mechanism, pressure data of a tactile sensing array on the surface of a disturbance disc are collected through Jetson, and the blockage state is judged in real time through a full-connection neural network; when blockage occurs, the Jetson directly controls the servo motor to change speed, the alternating inertia moment is matched with the gravity of fruits to overcome the resistance of the spring, and the disturbance disc is forced to passively incline around the center of the universal joint, so that the blockage is relieved. By means of the mode of combining motor rotating speed control and mechanical passive inclination, blockage caused by fruit accumulation is effectively damaged, and fruit damage is reduced while rapid dredging is achieved.

The utility model discloses a pneumatic locking device for a mechanical arm, which relates to the technical field of mechanical arms and comprises a mounting stabilizing chassis, the top end of one side of the mounting stabilizing chassis is rotatably connected with a first rotation adjusting shaft, and the top end of one side of the first rotation adjusting shaft is fixedly connected with a first rotation connecting arm. The rotation angle of a first rotation connecting arm is directly adjusted through rotation of a first rotation adjusting shaft, the inclination angle of a second rotation connecting arm can be directly adjusted through rotation of a second rotation adjusting shaft, and then the rotation angle of a mechanical claw mounting disc is directly adjusted; at the moment, a first starting locking motor directly controls pneumatic locking operation of a telescopic connecting rod in a telescopic connecting rod, and further locking operation is conducted on a second rotating connecting arm through contact between a buckle disc and the second rotating connecting arm and friction between an auxiliary friction strip and the second rotating connecting arm.

A system and method for collecting real time manufacturing data from a factory having multiple machines therein using internet-of-things (IoT) connectivity, comprising: at least one gateway comprising at least one server, the at least one gateway receiving data from the multiple machines; at least one machine communications module (MCM) that applies to the received data at least factory, enterprise, and analytics applications, and which outputs command and control information from the applications to the at least one gateway to directly control operations of the multiple machines; wherein the gateway provides security isolation on the machine side of the gateway, and encryption, authentication, and authorization security on the MCM side of the gateway; and wherein the applications process and normalize data from at least a plurality of types and generations of the multiple machines.

This invention relates to the field of tractor technology, and more particularly to a tractor applicable to multiple operating scenarios, comprising: a vehicle body, a control assembly, a traction connection assembly, a drive assembly, and a control assembly; the control assembly includes: a connector detachably connected to the vehicle body; an operating assembly rotatably mounted on the connector; a front wheel assembly rotatably mounted below the connector; and an adjustment assembly located below the operating assembly for switching between an integrated connection between the operating assembly and the vehicle body or an integrated connection between the operating assembly and the front wheel assembly; enabling the operating assembly to directly control the vehicle body or directly control the front wheel assembly; by changing the connection relationship between the operating assembly and the vehicle body or the front wheels through the adjustment assembly, the tractor can adapt to different working conditions, enabling multi-working-scenario applications of the tractor, and allowing the operator to flexibly adapt to different working conditions to achieve the optimal operating mode.

The application discloses a kind of LADRC control methods based on DAB converter, comprising: with the unit value of transmission power as control quantity, LADRC control is carried out through DAB converter linear large signal model;Wherein, the DAB converter linear large signal model is based on single-sided asymmetric duty cycle modulation method, and the control of output voltage is realized by directly controlling quantized transmission power.The control method proposed in the application improves the traditional linear active disturbance rejection controller under the premise of guaranteeing system performance, and optimizes the parameter setting process.Finally, it is verified through a simulation platform, and the overall efficiency in the full power range is significantly improved.The control proposed has better robustness than the traditional PI control, and greatly simplifies the problem of too many parameters and difficult to value in the design of traditional ADRC controller.

The utility model discloses a pull type water stop valve which comprises a valve element rod and a valve sleeve which are coaxially arranged inside and outside. The valve element rod is sleeved with a positioning rotor capable of rotating in the circumferential direction, a sealing groove capable of abutting against the end of the valve element rod in a sealed mode is formed in the end, corresponding to a water outlet of the valve element rod, of the valve sleeve, a water outlet channel is formed in the bottom wall of the sealing groove, and the end, provided with the water outlet, of the valve element rod can be matched with or separated from the sealing groove in a sealed mode by pulling the valve element rod in the axial direction of the valve sleeve. Opening and closing are directly controlled by axially pulling the valve element rod, the operation stroke is shorter, more operation time is saved compared with a traditional rotary valve, and the emergency water stopping requirement is met. Clear gear feedback can be provided through the meshing design of the positioning rotor and the tooth grooves, and misoperation is avoided. And through multiple sealing and modular design, the core defects of an existing water stop valve are systematically overcome, and the water stop valve has remarkable advantages in the aspects of operation efficiency, sealing reliability, maintenance cost and the like.

The utility model discloses an automobile cup stand with a refrigeration function, which comprises a cup stand, a refrigerant pipeline is wound on the outer wall of the cup stand, the cup stand is provided with a container which is in clearance fit with the inner wall of the cup stand, and a refrigerant outlet and a refrigerant inlet of the refrigerant pipeline are connected to an automobile air conditioner refrigerant circulating pipeline. The cup stand has the advantages that the temperature can be directly controlled, the heat transfer efficiency is high, the cup stand is fully combined with an air conditioner refrigeration system, the structure is simple, newly-added components are conventional vehicle devices, the overall increased cost is controllable, and the cup stand with the refrigeration function can be achieved at low cost.

This application relates to the field of vehicle control, specifically to a method for controlling a sunroof and a vehicle. This application, upon responding to a sunroof opening operation, compares the actual opening degree of the sunshade with the maximum driven opening degree to clarify the relationship between the two, thus mitigating the risk of premature sunroof opening from the control source. Secondly, based on the comparison results, a targeted motion strategy is formulated. If the actual opening degree of the sunshade already meets the maximum driven opening degree, the sunroof can be directly controlled to open normally. If not, the strategy is adjusted to ensure that the sunroof movement does not exceed the sunshade's adaptation range, avoiding an imbalance in the two opening degrees. Finally, this control logic does not require modification of the existing independent mechanical structure. Through linked judgment and strategy adjustment, it achieves dynamic adaptation between the sunroof opening and the sunshade opening degree, completely solving the problem of sunshade damage due to airflow impact and friction during driving caused by mismatched opening degrees, ensuring component lifespan and driving safety.

According to the variable-flow IGBT evaporative cooling system and the control method provided by the invention, dryness online calculation and closed-loop control based on pressure and density signals are introduced into the IGBT evaporative cooling system, so that accurate sensing and active regulation and control of a phase change state of a cooling medium are realized; therefore, it is ensured that the IGBT module is always in a gas-liquid mixing environment with the optimal heat exchange efficiency, the efficient heat dissipation capacity of phase change latent heat is fully utilized, local overheating or temperature fluctuation caused by excessive evaporation or insufficient liquid phase is avoided, the heat dissipation uniformity, stability and energy efficiency are fundamentally improved, and the heat dissipation efficiency is improved. The self-adaptive capacity of the system to different load working conditions is enhanced, and the guarantee is provided for long-term reliable operation and service life prolonging of the IGBT module through direct control over the key state quantity of dryness.

The utility model discloses an automatic turn-over processing device for fireproof door plates, which relates to the technical field of fireproof door plate processing and comprises a rotary turn-over machine, a master controller is fixedly mounted at the top end of one side of the front surface of the rotary turn-over machine, and a rotary adjusting disc is rotatably connected to the side surface of the rotary turn-over machine. And the top end of one side of the rotary adjusting disc is fixedly connected with a connecting shaft. By arranging the interior of a plate buckle limiting groove, a fireproof door plate needing to be machined is directly inserted into the plate buckle limiting groove, the position of a telescopic connecting column in a fixed connecting disc is adjusted by adjusting an auxiliary handle according to the actual length of the fireproof door plate, then the position of a movable connecting disc is adjusted, and length installation of the fireproof door plate can be better adapted; and the main controller directly controls the rotating angle of the rotating adjusting disc, the rotating angle of the fixed connecting disc and the rotating angle of the movable connecting disc can be directly adjusted, the overturning operation of the fireproof door plate is achieved, and the overturning flexibility of the device is further improved.

The invention provides a photovoltaic inverter DC side anti-reflux device and method, and belongs to the field of distributed power generation. The device is connected in series between a photovoltaic string and an inverter, and comprises a circuit breaking unit, a parallel power adjusting unit, a blocking diode and the like. The control method adopts a hierarchical control strategy of removal and adjustment: a controller collects the countercurrent power of a grid-connected point in real time, and when countercurrent is detected, the countercurrent power is judged; if the countercurrent power exceeds the output power of the single-path photovoltaic string, cutting off is executed, the corresponding number of circuit breaking units are directly controlled to be disconnected, and part of the photovoltaic string is physically cut off; and controlling the residual trace countercurrent power, calculating a PWM duty ratio by using a direct calculation or incremental PID algorithm, and driving a power adjusting unit to carry out hardware chopping consumption or suppression. According to the invention, long-time heating of the power device under large current is avoided, the problem of overlarge power regulation granularity caused by pure cutting is solved, and smooth and rapid countercurrent prevention of the photovoltaic system is realized.

A method for controlling multiple coverage effects according to an embodiment of the present invention is a method performed in a system comprising a main repeater and a plurality of sub-repeaters, comprising: a step in which the main repeater interacts with the plurality of sub-repeaters located in different places; a step in which the main repeater transmits to each of the plurality of sub-repeaters, for each of the main repeater, command data specifying effects control information for controlling the effects operation of a personal light-emitting device and conditions for transmitting the effects control information, such that different effects control information is specified for at least two or more sub-repeaters; and a step in which each sub-repeater that receives the command data automatically transmits an effects control signal according to the specified effects control information to at least one personal light-emitting device located within the signal radius of the corresponding sub-repeater using an RF broadcasting method, wherein the transmission is continuous or repeated according to the transmission conditions; wherein the transmission conditions include at least one of the signal radius, propagation direction, and playback mode of the effects control signal.

The utility model discloses a reactor with feeding device, including at least one reaction container and feeding device, and feeding device includes pneumatic generator and feeding container, and feeding container includes at least one storage container and at least one temporary storage container, and the direct communication of three between storage container, reaction container, pneumatic generator, and pneumatic generator communicates with temporary storage container, still including at least one valve, and the valve makes temporary storage container unable to communicate with storage container and reaction container simultaneously, the utility model discloses a reactor with feeding device utilizes the gas pressure generated by pneumatic generator as power source drive the flow of liquid, according to the amount of control increasing or reducing gas pressure directly control the amount of supplementary liquid, realize high accuracy's feeding, under the whole reactor keeps sealed state, carry out sterilization to gas can guarantee the sterile state inside whole reactor, realized simple, high -efficient feeding's while effectively reduce cost and operation difficulty.

The utility model discloses mechanical stretching stamping equipment for an aluminum extrusion part, which relates to the technical field of aluminum extrusion part production and comprises a fixed mounting base plate, a stamping die plate is detachably mounted at the top end of one side of the fixed mounting base plate, and a stretching plate is fixedly connected to the top end of the side surface of the fixed mounting base plate. The stamping die disc is directly mounted on the fixed mounting base plate in a buckled mode, the aluminum materials stretch into the fixing frame through the feeding arrangement groove, the position, in the fixing frame, of the threaded extrusion rod is rotated by rotating the top disc, and the aluminum materials are extruded and fixed through the extrusion disc; the two sides clamp and fix aluminum materials at the same time, the stretching driving motor controls rotation of the threaded driving rod, so that the sliding adjusting base plates are directly controlled to slide at the top end in the stretching disc to adjust the positions, and the distance between the sliding adjusting base plates on the two sides is adjusted, so that stretching operation of the aluminum materials can be achieved.

The utility model provides a kind of automatic switch structure and waistband of waistband, belong to automatic switch technical field, it need not increase external switch spare on waistband, reduce operation complexity, directly control waistband control module circuit on-off by the physical action of magic paste adhesion / separation, realize the function fusion of wearing operation and equipment switch on-off.The technical scheme is: including trigger module and power-on detection module, trigger module is arranged in hook face subassembly;Power-on detection module is arranged on the surface of hair component;Waistband control module and battery are arranged in the surface of hair component, and waistband control module is connected with battery as non-closed loop;The surface of hair component and hook face subassembly are arranged at the both ends of waistband;When the distance between trigger module and power-on detection module is less than or equal to set value, waistband control module and battery circuit are conducted, to form closed loop;When the distance between trigger module and power-on detection module is greater than set value, waistband control module is powered off.