693results about How to "Increase freedom" patented technology

The invention relates to the technical field of railway vehicles, and provides a wheel set, a bogie and a railway vehicle. The wheel pair comprises a shaft sleeve structure, an axle, a pair of wheels and a connecting structure; the axle is rotationally arranged in the shaft sleeve structure; the pair of wheels is arranged at the two ends of the shaft sleeve structure respectively and rotationally connected with the shaft sleeve structure. The connecting structure is connected with the axle and the wheels and used for achieving synchronous rotation of the axle and the wheels. According to the wheel set, the bogie and the railway vehicle, the wheels are rotationally connected with the shaft sleeves, the axles are rotationally connected with the shaft sleeves, synchronous rotation between the axles and the wheels is achieved through the connecting structures, torque is transmitted between the axles and the wheels, the shaft sleeves bear bending moment, and therefore decoupling of the torque transmission function and the bearing function is achieved; the requirement on the strength of the axle is effectively reduced; in addition, the freedom degree of structural design is improved, and the overall weight is reduced.

The invention discloses a permanent magnet synchronous motor active disturbance rejection speed control method based on a double-error correction extended state observer, and the method comprises the steps: constructing a double-error correction extended state observer structure combining a speed estimation error and a position estimation error, and outputting a speed ring lumped disturbance observation value to a feedback control law. An optimized observer parameter setting strategy is designed based on the control structure, decoupling configuration of a zero point and a pole point in a disturbance suppression function is achieved, the position of the zero point in the disturbance suppression function is optimized by combining time domain and frequency domain analysis, and the disturbance suppression performance of the system is enhanced. Therefore, the method has the advantages that on the premise that pole assignment of an original closed-loop system is not affected, the dynamic response and steady-state performance of disturbance suppression are enhanced through the additional zero-point movement track, and the degree of freedom of performance adjustment of the linear expansion state observer and the upper limit of disturbance suppression performance are widened.

The utility model provides a mowing robot. The mowing robot comprises a main body bracket, two omnidirectional wheels, two driving wheels, four driving motors and a driving control system, the main body bracket comprises a first end and a second end; the first end and the second end are oppositely arranged; the two omnidirectional wheels are arranged at the first end; the two driving wheels are arranged at the second end; the rated powers of the four driving motors are the same; the four driving motors are arranged in one-to-one correspondence with the two omnidirectional wheels and the two driving wheels; each driving motor is connected with the corresponding omnidirectional wheel and drives the omnidirectional wheel to rotate or is connected with the corresponding driving wheel and drives the driving wheel to rotate; the driving control system is used for being connected with the four driving motors and controlling the rotating speed of the two omnidirectional wheels and the rotating speed of the two driving wheels by controlling the input currents of the four driving motors. Therefore, the four driving motors with the same rated power are adopted, the situation that the grass is deep, the resistance is large, and consequently slipping occurs can be overcome, and the advancing speed of the mowing robot is guaranteed.

The invention discloses an off-grid photovoltaic power generation system based on flywheel clean battery energy storage. A cleaning model and a charging / discharging equivalent model circuit under a d-q shaft system are established; a control strategy in the flywheel battery charging / discharging process is analyzed and determined, a photovoltaic system and a flywheel battery are combined, a combined system is divided into four working models according to the supply-demand relation between the output power of the photovoltaic system and the power required by a load, and a control method of a combined controller is formulated. And analyzing and optimizing the operation state of the system under each working model and the energy storage and release effects of the flywheel battery. The combined system can stably operate under each working model and among the working models; the charging / discharging efficiency and the discharging depth are relatively high, and a quick response can be made to the difference value change of the output and the load power of the photovoltaic system; and energy is stored when the output of the photovoltaic system is residual, and energy is released to make up for the demand when the output of the photovoltaic system is insufficient, so that the electric energy quality is effectively improved, and the resource waste is reduced.

The invention relates to a three-dimensional network carbide reinforced refractory alloy and a preparation method thereof, and belongs to the technical field of alloy material preparation. The three-dimensional network carbide reinforced refractory alloy is composed of a BCC matrix phase and a large number of dispersed three-dimensional network carbide reinforced phases, and the crystal structure of the carbide is M2C or MC type and is in a complete coherent relationship with the BCC matrix. The method has high adaptability, the applicable refractory alloy material range is wide, particularly fine component design is not needed, the process window is wide, and operation is easy. According to the material prepared by the method, a carbide phase and a matrix are coherent, the bonding strength is high, the stability is good, and repeated thermal cycle can be endured. According to the method, integration of material preparation and component forming can be achieved, high-freedom-degree direct forming of complex three-dimensional parts is directly achieved, and the forming requirement in the actual using process can be met to a great extent.

The utility model discloses a small-tonnage forklift fork device which comprises an installation assembly, the installation assembly comprises an installation support, and the installation support is connected with a horizontal long shaft. The transverse moving assembly comprises a left-side pallet fork, a right-side pallet fork, a left-side oil cylinder and a right-side oil cylinder; and the hydraulic assembly is respectively communicated with the left oil cylinder and the right oil cylinder. The oil cylinders on the left side and the right side are connected with the pallet forks on the left side and the right side, and then the motion states of the pallet forks can be controlled. The hydraulic assembly is arranged to control the oil cylinders on the left side and the right side to stretch or retract at the same time, so that the distance between the pallet forks on the left side and the right side can be adjusted according to the inserting position distance of a tray. The hydraulic assembly is arranged to control the shortening of the left side oil cylinder and the extension of the right side oil cylinder, so that the left side pallet fork and the right side pallet fork can move leftwards at the same time and can also move rightwards at the same time, the forklift pallet fork device can adapt to different types of pallets and can transversely move cargoes in a narrow space, and the freedom degree of movement of the pallet forks is increased.

The invention discloses an intelligent laser cladding system and method for a stainless steel plate of a bridge support, and aims to realize accurate and efficient cladding processing and improve the surface performance of a material. The system comprises a six-axis multi-joint robot, a laser tracker, a laser cladding head, a wire feeding mechanism and an electrical control system. The robot controls the laser cladding head to move, the laser tracker monitors and adjusts the cladding process, the laser cladding head provides laser energy, the wire feeding mechanism supplies cladding wires, and the electric control system coordinates all the components to work. The method comprises the steps of matrix pretreatment, cladding system parameter setting, intelligent laser cladding and cladding layer finish machining and polishing treatment. By accurately controlling conveying of laser beams and metal wires and motion parameters of all parts, intelligent high-quality cladding machining of workpieces made of different materials and in different shapes is achieved, and the device is suitable for cladding of stainless steel plates with planes, convex surfaces and concave surfaces. According to the system and the method, the cladding precision and efficiency are improved, the cost is reduced, and the system and the method have wide industrial application prospects.

The embodiment of the invention discloses a coupling device of superconducting quantum bits, a superconducting quantum chip and a quantum computer. The superconducting quantum bit coupling device comprises a first superconducting quantum bit, a second superconducting quantum bit, a first coupling module, a second coupling module and an adjustable coupling module, the adjustable coupling module comprises two resonance circuits, and the frequency of at least one resonance circuit is adjustable. According to the invention, the coupling strength symbols between the two resonance circuits of the adjustable coupling module and the first superconducting quantum bit are opposite and the coupling strength symbols are the same or similar, and the coupling strength symbols between the two resonance circuits of the adjustable coupling module and the second superconducting quantum bit are the same and the coupling strength symbols are the same or similar. Therefore, when the frequency of the first resonance circuit is the same as or close to the frequency of the second resonance circuit, the coupling between the two superconducting quantum bits is turned off, the coupling turn-off is irrelevant to the frequency of the two superconducting quantum bits, and the two superconducting quantum bits have the characteristic of full-band coupling turn-off.

The invention discloses matched bearing test equipment for a helicopter rotor system, and belongs to the technical field of bearing test, one side of a driven swing shaft is provided with a swing gear engaged with a driving fan, and the middle part of the driven swing shaft is provided with a detection plate; a gear ring is fixedly arranged on the inner side of the rotating shaft, and an inner gear is fixedly arranged in the middle of the gear ring; an overturning gear which is intermittently meshed with the gear ring and the inner gear is mounted on the inner side of the overturning shaft, and an overturning cylinder is fixedly arranged on the other side of the overturning shaft; toothed plates matched with each other are arranged on the detection plate in a sliding mode, a positioning frame is fixedly arranged at the bottom of each toothed plate, and bearings to be detected are installed in the overturning cylinders and the positioning frames. The to-be-tested bearing can be clamped and rotated through the overturning cylinder and the sealing cover, when the rotating motor drives the gear ring and the inner gear to rotate, the outer meshing teeth and the inner meshing teeth drive the overturning gear and the to-be-tested bearing to intermittently rotate in a reversing mode, and therefore the sealing effect in a high-strength rotating mode is simulated; the design improves the automation level and the detection efficiency.

The invention discloses a preparation method of an amphiphilic porous transmission layer, which comprises the following steps: 1) carrying out hydrophobization treatment on a titanium-based material to obtain a hydrophobic titanium-based material; (2) the hydrophobic titanium-based material obtained in the step (1) is subjected to laser regional burning treatment; and (3) carrying out hydrophilic treatment on the titanium-based material subjected to the cauterization treatment in the step (2) to obtain the amphiphilic porous transmission layer. According to the amphiphilic porous transmission layer provided by the invention, the amphiphilic porous transmission layer with a hydrophilic-hydrophobic alternating structure is constructed by combining a laser processing technology and a PTFE (Polytetrafluoroethylene) dipping hydrophobic modification technology, so that the split-diameter transmission of liquid water and oxygen in the titanium felt can be realized, the liquid water and the oxygen are efficiently discharged through a hydrophilic region and a hydrophobic region respectively, and the oxygen content in the titanium felt is reduced; and the mass transfer limitation of the electrolytic cell under high current density operation is greatly reduced, and the long-term operation life of the electrolytic cell is prolonged.

The invention relates to an integrated experiment table system for measuring electrolytic performance and internal temperature of an alkaline water electrolytic bath. The integrated experiment table system comprises an environment box, the alkaline water electrolytic bath for experiments, a direct-current power supply, a hydrogen side gas-liquid separation bottle, an oxygen side gas-liquid separation bottle, a temperature measuring line, a paperless recorder and a constant-temperature water bath. The alkaline water electrolytic bath for experiments can change flow field design, small chamber scale, heat dissipation and bath body environment temperature control components so as to meet diversified experiment requirements. And the alkali liquor circulating pump is connected with the gas-liquid separation bottle and the electrolytic bath to realize alkali liquor circulation. And the computer terminal is in communication connection with the direct-current power supply, the paperless recorder and the alkali liquor circulating pump and is used for data collection and component control. The hydrogen-side gas-liquid separation bottle and the oxygen-side gas-liquid separation bottle have specific structures for gas-liquid separation and alkali liquor treatment. Compared with the prior art, the experiment table system is easy to disassemble and assemble, stable in operation, capable of decoupling key parameters and obtaining dynamic temperature data in the electrolytic cell, large in freedom degree and capable of guiding industrial hydrogen production strategy making and assisting related research and product research and development of the alkaline water electrolytic cell.

The invention discloses a narrow pulse ns-level time delay compensation type plane reflection array antenna, and belongs to the technical field of antennas. The array antenna comprises a reflective array antenna and a feed source, and each array element in the reflective array antenna performs corresponding time delay compensation on electromagnetic waves emitted by the feed source according to the distance between the array element and the feed source so as to improve the gain of a reflective wave beam in an expected direction. According to the invention, a time delay type compensation method is adopted to enable the pulse signals fed into the plane reflection antenna array to realize simultaneous, equal-amplitude and same-phase superposition in a far field, so that the time domain pulse distortion phenomenon is avoided, the time delay compensation of electromagnetic waves fed into the plane reflection antenna array can be effectively realized, and the antenna gain and the fidelity of received signals are improved.

The invention discloses a robot head device capable of simulating expressions. The robot head device comprises a head shell, a head mold, a neck mechanism and a head structure arranged at the top of the neck mechanism. The head shell is arranged on the head structure, and the head mold is arranged on the head shell in a sleeving mode. The neck mechanism is used for driving the head structure to do left-right pitching rotation motion; the head structure comprises an upper layer mechanism used for controlling opening and closing of eye curtains and rotation of eyebrows, a middle layer mechanism used for controlling rotation of eyeballs and movement of cheeks, and a lower layer mechanism. The lower-layer mechanism comprises a mouth mechanism for controlling the mouth to open and close; the upper layer mechanism comprises a first control mechanism, a second control mechanism, a third control mechanism and an eyebrow bone mechanism, and the second control mechanism is used for driving the eyebrow bone mechanism to move up and down; the middle-layer mechanism comprises an eye mechanism, a fourth driving mechanism, a cheek mechanism and a nose bridge. The human expression simulation device can simulate human expressions, and is high in degree of freedom, compact in structure, low in cost and easy to use on a large scale.

According to the non-intrusive audio health conditioning system and conditioning method, various detection data of a user before conditioning are detected through an HRV intelligent detection module, a user conditioning scheme is formulated, and the conditioning scheme is integrated to an audio signal generator; the audio signal generator can recommend and generate an audio conditioning scheme most suitable for a current user according to user information, the audio conditioning scheme is output to the audio adjusting module, and after the audio conditioning scheme is set, the audio adjusting module converts audio signals through the audio conversion module and transmits the audio signals to the bone conduction module; auditory perception and tactile stimulation are realized through mechanical vibration of the bone conduction module, so that conditioning of single and composite audio information of a human body is realized, and the physical and mental state of the human body is improved. In the audio information conditioning process, a user can carry the bone conduction module to move freely within the wireless signal transmission range, daily life, work and study are not affected, the degree of freedom is higher, and use is more convenient.

The present invention relates to the field of rope-driven mechanical arms. The technical solution is: a three-degree-of-freedom wrist joint structure for rope-driven mechanical arms, characterized in that: the structure includes three motor wheels arranged on a base, a rotary base rotatably positioned on the base, a plurality of pulleys fixed in the base, a transmission shaft rotatably positioned on the rotary base around a horizontal axis, a first winding wheel sleeved and fixed on the rotary shaft, a second winding wheel and a third winding wheel rotatably sleeved on the rotary shaft, a first output wheel and two winding wheels sleeved and fixed on the transmission shaft, a second output wheel rotatably sleeved on the transmission shaft, an end platform connected to a rocker, two winding rings rotatably sleeved on the first rotating shaft of a universal joint, two support rods sleeved on the second rotating shaft of a universal joint, two transmission ropes driving the rotary base, a plurality of transmission ropes driving the rocker, and the remaining plurality of transmission ropes driving the end platform. The present invention can increase the operable space of the mechanical arm.

A rigid-flexible integrated multifunctional lower limb rehabilitation training device comprises a base (100), a flexion and extension support (200), a hip and knee joint flexion and extension autonomous training control mechanism (300), an ankle joint dorsal extension and plantar flexion training mechanism (400), a hip and ankle joint inward and outward rotation autonomous training mechanism (500) and a hip joint adduction and abduction autonomous training mechanism (600). Mainly comprises a flexion and extension hand pull rope (310), a pedal plate (320) and a pedal pull rope (330); a support plate (410) and an elastic member (420); the internal and external rotation training device comprises a support frame (510), an internal and external rotation training arc-shaped track (520), an internal and external rotation roller (450) and an internal and external rotation training pull rope (530), the gear (620) is meshed with the adduction and abduction training arc-shaped track (610), and the adduction and abduction training pull rope (630) is arranged on the adduction and abduction training arc-shaped track (610). The lower limb core muscle group rehabilitation training device integrates multiple modes such as multiple joints, multiple degrees of freedom, passive, assisting and active as soon as possible in the lying position, can simulate gait training in the lying position, and effectively promotes early rehabilitation of a patient.

The invention discloses a surface phosphating and cleaning device for metal rollers for foils, and relates to the technical field of metal material surface treatment.The surface phosphating and cleaning device comprises a base and a fixing frame, a phosphating pool and a cleaning pool are fixedly arranged at the top of the base, and two walking mechanisms are arranged at the top of the base; a portal frame is fixedly connected between the tops of the two walking mechanisms, two first multi-stage electric telescopic rods are symmetrically arranged on the top face of the inner side of the portal frame, a mounting plate is fixedly connected to one ends of the first multi-stage electric telescopic rods, two guide rods are fixedly connected to the bottom of the mounting plate, and a fixing frame is fixedly connected with the guide rods. Three swing washing structures are arranged outside the fixing frame, and the first storage rack and the fixing frame are fixedly connected in a penetrating mode. According to the surface phosphating cleaning device for the metal rollers for the foils, the problem that a plurality of metal rollers are damaged due to mutual collision during phosphating is solved.

The embodiment of the invention provides an electroencephalogram collecting device and electroencephalogram collecting equipment. The electroencephalogram collecting device comprises an electroencephalogram collecting sub-device, the electroencephalogram collecting sub-device comprises a collecting base, the collecting base comprises a hexagonal frame body with the center area protruding outwards and seven mounting parts arranged on the frame body, and the seven mounting parts comprise the first mounting part located in the center area and the six second mounting parts located around the first mounting part; the center distance between each second mounting part and the first mounting part and the center distance between every two adjacent second mounting parts have a preset value, and the distance from the center of each second mounting part to the two outer edges, adjacent to the second mounting part, of the frame body is smaller than or equal to half of the preset value; at least one of the seven installation parts is detachably provided with the electrode assembly, the electrode assembly comprises an electrode, and the collection end of the electrode is located on the virtual cambered surface on the inner side of the collection base. The electroencephalogram collecting device can be used for collecting signals of the whole brain or a specific brain area.

The invention relates to the technical field of artificial intelligence, in particular to an intelligent large-screen multi-round dialogue linkage method based on a large model. A user can control the intelligent large screen anytime and anywhere through the mobile phone without being limited by time and equipment operation. Compared with a traditional interaction mode, the user experience is more natural and convenient. A two-dimensional code generated by an intelligent large screen is scanned through a mobile phone program, a safe interaction channel is established through a WSS protocol of Websocket, and multi-round dialogue control is performed by using a large model.

The invention discloses a magneto-rheological three-dimensional force feedback type upper limb active and passive rehabilitation training device which comprises a bearing base, and a first bearing seat, a second bearing seat, a first torque motor base, a second torque motor base and an encoder base which are installed on the bearing base through bolts and fixed through bolts. The bearing base is provided with 21 groove-shaped holes which are connected with the transmission system, the transmission system is arranged above the bearing base, a first-class three-dimensional rod piece is arranged above the bearing base, and a magneto-rheological joint module is arranged above the bearing base. The magneto-rheological three-dimensional force feedback type upper limb active and passive rehabilitation training device has more comprehensive freedom of motion, so that the rehabilitation training requirements of patients are better met, compared with an exoskeleton robot, the magneto-rheological three-dimensional force feedback type upper limb active and passive rehabilitation training device is simple in structure, high in adaptability and more convenient to install and debug, and meanwhile personalized adjustment can be conducted according to specific conditions of different patients.

The invention relates to the technical field of drilling fluid preparation, in particular to slim-hole horizontal well drilling fluid and a preparation method thereof.The drilling fluid is prepared from, by weight, 100 parts of clear water, 15-20 parts of bentonite, 12-15 parts of functional auxiliaries, 12-15 parts of weighting agent, 8-10 parts of stabilizer and 8-10 parts of lubricant. According to the drilling fluid, the plant ash and the activated carbon powder are subjected to gelatinization reaction after being mixed with the corn starch and are combined to generate a rich pore structure, after the functional additive is used as a raw material to prepare the drilling fluid, a granular layer can be generated on the surface of the drilling fluid by utilizing the rich pore structure and the superfine powder state of the functional additive, and in the drilling process, the surface of the drilling fluid can be effectively protected. The existence of the granular layer can destroy the liquid level tension, so that the contact area of the liquid level of the drilling fluid and air is increased, the heat dissipation efficiency of the drilling fluid is improved, and the stable performance of the drilling fluid in a high-temperature state is ensured.

The utility model discloses a large pressure vessel butt weld ultrasonic flaw detection automatic detection robot, and belongs to the technical field of weld detection equipment. The mechanical arm is arranged on one side of the bearing device, the flaw detection device and the coupling agent smearing device are both mounted on the mechanical arm, and the flaw detection device is connected with a translation device for driving the flaw detection device to move along the bearing device. According to the automatic ultrasonic flaw detection robot for the butt weld of the large pressure vessel, the bearing device can bear the pressure vessel, the translation device drives the mechanical arm to translate, so that the position of the mechanical arm can be adjusted, the mechanical arm drives the flaw detection device and the coupling agent smearing device to move, and a to-be-detected part can be smeared with a coupling agent; the flaw detection of the pressure vessel is realized from the outer side of the pressure vessel, the degree of freedom is higher during flaw detection, the automation degree is high, and the detection is more accurate.

The invention belongs to the technical field of robot arms, and particularly relates to an artificial intelligence robot arm which comprises a chassis base, and an all-directional rotating assembly is arranged above the chassis base. Through use of the sliding seat, the fixing frame, the rotating motor, the threaded rod, the sliding rack, the driving gear, the rotating frame, the rotating shaft and the infrared observation camera, the walking distance and the grabbing position of the clamping end of the robot arm can be driven more quickly and accurately, and therefore flexible adjustment is conducted according to specific use requirements; the characteristic of high degree of freedom when the robot arm works is achieved, the application range of the grabbing part of the robot arm is expanded, objects at any angle and position can be automatically grabbed, the positions of the objects do not need to be limited before grabbing is conducted at the grabbing end, manual operation is not needed, the intelligent degree is high, and the working efficiency is improved. And the working efficiency of grabbing and carrying of the robot arm is greatly improved.

The invention discloses a device and a method for crystal growth. The device comprises a vacuum furnace body system; the double-area heater comprises an upper heater and a lower heater which can be independently controlled, and the double-area heater is arranged in the furnace body and used for adjusting the temperature of the upper area and the temperature of the lower area to form the needed temperature gradient; the heat preservation structure is arranged in the furnace chamber and cooperates with the double-zone heater to form a stable upper high-temperature zone, a stable middle gradient zone and a stable lower low-temperature zone; the multi-rod crucible assembly is arranged in the thermal field in the thermal insulation structure and has the characteristic of symmetrical arrangement; and the crucible lifting mechanism is connected to the multi-rod crucible assembly and is used for adjusting the position of the crucible in the crystal growth process. According to the invention, the stability of the temperature field, the simplification of the structure and the reduction of the cost are realized, and the stress concentration is effectively reduced. Meanwhile, the method supports high-throughput crystal growth, increases the degree of freedom of growth crystal specifications, improves the component screening efficiency, shortens the crystal research and development period, and improves the production efficiency.

A building slow-bonding prestressed stress detection device comprises a limit sleeve sleeved on an anchor seat, a support cylinder is arranged on the side of the limit sleeve away from the anchor seat, the support cylinder is coaxially arranged with the anchor seat, and a plurality of telescopic oil cylinders are arranged circumferentially on the outer wall, the output end of the telescopic oil cylinder is arranged perpendicular to the limit sleeve, and the distance between the limit sleeve and the support cylinder can be adjusted; a plurality of selective locking sleeves cooperating with steel strands are arranged on the inner side of the support cylinder, and each selective locking sleeve is penetrated by a single steel strand, and the selective locking sleeve can freely switch the connection state with the steel strand, that is, it can be locked relative to the steel strand and move relative to the steel strand; a displacement sensor is also arranged on the outer side of the support cylinder to monitor the linear distance with the limit sleeve, and the detection items to be performed can be freely selected through the selective locking sleeve and the prestressed stress detection can be completed without disassembly and assembly in the middle, and its adaptation system and use method are simultaneously disclosed.

The invention belongs to the technical field of medical instruments, and particularly relates to a scissor type interbody fusion cage which comprises a base and an upper supporting plate, the base is connected with the upper supporting plate through a scissor type jacking mechanism, and protruding teeth are arranged on the base and the upper supporting plate; the shear type jacking mechanism comprises a jacking block, a shaft rod, an arched top plate, a movable block and a push rod; a movable block is installed on the bottom face in the base, and the arched top plate is located between the movable block and the inner wall of the base. The upper end of the arched top plate is connected with the upper supporting plate; the fusion cage is simple in structure, the arched top plate and the movable block are combined into a relatively flat scissor type structure, the size of the fusion cage is further reduced, the fusion cage can be conveniently implanted and used, the thickness can be conveniently adjusted, meanwhile, the freedom degree of movable parts in the fusion cage is reduced and limited, and the stability of the fusion cage after the thickness is adjusted is guaranteed.

The invention discloses an output power control method and device, a terminal and network side equipment, and belongs to the technical field of communication, and the output power control method comprises the steps that the terminal improves the upper limit value of the maximum output power of the terminal according to a target power adjustment value; wherein the lower limit value of the maximum output power of the terminal is kept unchanged, or the target power adjustment value is related to RB allocation of the terminal.

According to an embodiment of the present invention, a battery charging control device may include: at least one processor; and a memory configured to store at least one instruction executed by the at least one processor. The at least one instruction may include an instruction to derive a plurality of optimal charging mappings satisfying a charging target based on the battery state information and the charger state information when user input information including the charging target is received; outputting, through a predefined graphical user interface (GUI), an instruction about each of the derived optimal charging mappings; and an instruction to control the battery to be charged using the optimal charging map corresponding to a user selection signal when the user selection signal for one of the optimal charging maps is received.

The present invention relates to an expansion adhesive sheet comprising: a base material; two thermal expansion adhesive layers respectively disposed on both sides of the substrate; the expansion bonding sheet is characterized in that the expansion bonding sheet further comprises a release paper layer which is arranged on the surface of one thermal expansion bonding agent layer; and the release paper is double-sided release paper. The invention has the following beneficial effects: during winding, only one layer of release paper (the upper layer or the lower layer) is peeled off, so that the molding equipment is simplified, the winding can be carried out at a higher temperature without using measures for reducing the product performance, and the adhesion is avoided during winding; compared with a five-layer structure attached with non-woven fabric or sprayed with a release agent, the operation convenience is improved, and the requirements of instruments and equipment are simplified; according to the scheme, the degree of freedom of adhesive formula design can be improved at the same time, and the softening point of the expansion bonding layer can be reduced on the premise of ensuring that the expansion bonding layer is non-viscous at room temperature.

The invention discloses bracelet equipment, a virtual reality system, a control method and equipment of the virtual reality system and a storage medium, and relates to the technical field of virtual reality. The bracelet equipment comprises a bracelet main body and a hand shooting assembly; the hand shooting assembly is arranged on the side, facing the hand, of the bracelet body. The technical problem that the interaction convenience of the virtual reality equipment is poor is solved.