38results about How to "Achieve precise control" patented technology

The invention relates to the technical field of cell culture, and discloses a stem cell differentiation degree identification method based on image features. The method comprises the following steps: continuously capturing multi-temporal image data in a stem cell culture process through a high-resolution microscopic imaging system, and generating an image and environment synchronous data set; processing the data set, extracting dynamic morphological features and texture change modes of the stem cells, and constructing a fusion feature set; outputting a differentiation process index based on the fusion feature set; a differentiation degree grade division rule is set, and a differentiation process index and differentiation grade mapping table is established; in a real-time application stage, acquiring real-time imaging data and environment readings, and inputting the real-time imaging data and the environment readings into an evaluation network to calculate real-time differentiation process indexes; querying the mapping table according to the real-time index to obtain a differentiation grade judgment result; comparing the judgment result with a preset target range, and if the judgment result falls into the target range, automatically executing differentiation state marking and culture parameter adjusting operation.

The invention provides a double-layer jacquard fabric interlayer weaving process and a double-vision artistic effect realization method, and the method comprises the following steps: providing warp yarns, weft yarns and interlayer connecting yarns which are adaptive to double-layer jacquard, and the breaking strength of the interlayer connecting yarns is not less than 3.2 cN / dtex; the method comprises the following steps: importing surface layer jacquard pattern data and inner layer jacquard pattern data into a pattern weaving CAD system, presetting a yarn interweaving threshold value and pattern edge transition parameters of an interlayer connection area, generating a collaborative weaving data table of surface and inner layer jacquard and interlayer connection, marking corresponding interweaving areas of surface layer patterns and inner layer patterns, and carrying out collaborative weaving; the collaborative weaving data table comprises intervention opportunities and interweaving frequency parameters of connecting yarns in each region; according to the invention, by switching the connecting structure in different periods, adapting to the characteristics of the jacquard area and combining the parameters of the connecting yarn and the limitation of the interweaving depth, the complete concealment of the connecting points, the accurate alignment of mirror image jacquard of the surface and inner layers, the control of the dislocation amount within 0.15 mm and the complete and non-split double-visual effect are realized, and the visual requirements of high-end fabrics are met.

The utility model discloses a multistage gradient water-cooling quenching mechanism for aluminum profiles, which relates to the technical field of aluminum profile processing and comprises a side frame, a protective cover fixed on the side frame through screws, a multistage gradient quenching component, a quenching control component and a water-cooling circulating component. According to the utility model, the multi-stage gradient quenching assembly is arranged, the flow speed of cooling water of each stage of cooling unit is accurately controlled, and controllable gradient cooling is realized, so that the cooling speed of each part of the aluminum profile tends to be consistent, the deformation stress generated by non-uniform cooling is effectively reduced, and the dimensional accuracy and the surface quality of the aluminum profile are improved; according to the equipment, the temperature change of the aluminum profile can be monitored in real time through the infrared temperature sensor, data are fed back to the control box, the control box automatically adjusts the flow speed of cooling water according to a preset temperature-flow speed curve, automatic and precise control over the cooling process is achieved, and the production efficiency and the stability of the product quality are improved.

The utility model discloses a kind of corrugated board slitting device, it is related to corrugated paper processing technical field, including workbench;The surface of the workbench is equipped with support plate, and the bottom inner side of support plate is equipped with moving assembly, and the bottom of moving assembly is provided with lower moving assembly, and the lower portion of lower moving assembly is equipped with rotating assembly;The utility model is equipped with rotating assembly below lower moving assembly, and the output end of motor is rigidly connected with mounting block, forms the rigid transmission chain of "motor-mounting block-cutter", ensure that the torque of motor output can be transmitted to cutter without loss, realize the accurate control of angle, in slitting process, if angle needs temporary adjustment, motor can respond instruction in time, when cutter does not contact paperboard or leave paperboard surface, quickly complete angle correction, without interrupting overall process, this kind of dynamic adjustment ability greatly improves the adaptability of device to complex slitting task, reduces the downtime of replacing different angle cutter, improves production efficiency.

The utility model relates to the technical field of robots, in particular to a wheeled robot control device which comprises a transmission body, a carrier, a rubber ball wheel and a transmission assembly, the carrier is provided with the transmission body, the transmission assembly is used for driving the rubber ball wheel to axially rotate, and the rubber ball wheel is arranged on the side face of the carrier. The transmission assembly is arranged in the carrier. The motor transmits power to the rubber ball wheel, simplification and high efficiency of the robot structure are achieved, the elastic characteristic of the rubber ball wheel is beneficial to impact absorption, damage to the internal structure of the robot is reduced, the service life of equipment is prolonged, the transmission body is finely adjusted through the micrometer, and the service life of the equipment is prolonged. The controllability and accuracy of contact between the ball control part and the football are achieved, and the adjusting process of the ball control strength of the ball control structure is greatly simplified through the application of the spring.

A saw blade punching tooth combined die, the die comprises a bottom table, a bottom plate, an upper clamp plate, a lower clamp plate, a rotating plate and a top table, a plurality of size concave dies are carried through the rotating plate between the upper and lower clamp plates, precise positioning is realized by the interference fit of the ratchet disc and the ratchet groove, the rotating plate outer wall tooth groove corresponds to the scale bar of the upper clamp plate, the rotating angle is directly controlled, the top table quickly replaces the punch plate through the clamping plate, and the punch tooth processing is completed in cooperation with the convex die and the concave die; the bottom table storage groove integrates the idle punch plate, and part loss is avoided. The present application solves the problems of low die changing efficiency, positioning deviation and single function of the traditional die, realizes the rapid switching and high-precision processing of multiple specifications of tooth shape, and improves the flexibility and reliability of saw blade production.

This specification provides a data processing method and apparatus, wherein the data processing method includes: preprocessing initial audio data to obtain audio data, and inputting the audio data into an audio recognition model to obtain initial text containing prosody identifiers; determining at least one text unit corresponding to the initial text, and determining time information corresponding to each of the at least one text unit based on the audio data; updating the initial text in the prosody identifier dimension based on the time information corresponding to each of the at least one text unit to obtain target text corresponding to the audio data, wherein the target text and the audio data are used to train an audio generation model.

The utility model discloses a kind of drying device of DNPH silica gel column auxiliary drying forming, including drying cabinet main body, the drying cabinet main body top surface center position is equipped with speed reducer, drying cabinet main body inside through-hole is equipped with suspension subassembly, drying cabinet main body lower end rectangular recess is equipped with electric heating tube, drying cabinet main body lower end rectangular recess edge is welded with shunt plate, the bottom surface circular through-hole of drying cabinet main body is equipped with fan subassembly, drying cabinet main body one side upper end rectangular through-hole is welded with exhaust frame, the top surface of drying cabinet main body one corner is equipped with control box, the inside edge of drying cabinet main body is movably installed with inner cabinet door by hinge.The drying device of DNPH silica gel column auxiliary drying forming of the utility model is designed by rotating suspension, hot air circulation, accurate control and convenient operation, improves the uniformity, efficiency and quality of DNPH silica gel column drying, and it is convenient to move, and strong applicability.

This invention relates to a gradient self-heating material based on phase change-oxidation synergistic regulation, its preparation method, and its application. The gradient self-heating material based on phase change-oxidation synergistic regulation comprises a core layer, a transition layer, and a shell layer connected sequentially; wherein the core layer is a reduced iron powder-phenolic resin composite layer; the transition layer is a gradient transition structure of iron powder, CNT-graphite composite material, and resin; and the shell layer is a catalytic phase change material particle-resin composite layer; the volume percentages of the shell layer, transition layer, and core layer are 20%-30%, 20%-30%, and 40%-60%, respectively. The problem this invention aims to solve is overcoming the interfacial failure challenge between the oxidant and the phase change material through chemical bonding reconstruction, breaking through the thermal accumulation bottleneck by employing a gradient thermal conductivity structure design, and achieving cross-scale synergy across four dimensions: exothermic reaction, heat storage phase change, heat conduction, and dynamic regulation. The final product's thermal response time (temperature greater than 50℃) is <30 seconds.

The utility model relates to a kind of syrup preparation and stirring device, especially a kind of toffee corn ball syrup preparation and stirring device.The technical scheme is as follows:one kind of toffee corn ball syrup preparation and stirring device, including cylinder, fixed support, sealing cover, electric heating resistance wire, blanking tube and control valve one, etc., cylinder is made of two layers, forms a sandwich space, the sandwich space is cooling cavity, cylinder outer wall is fixedly connected with fixed support, cylinder top is placed with sealing cover, at least three electric heating resistance wires are fixedly connected with annular array in the cavity in the bottom of cylinder, the cavity and cooling cavity are not communicated, cylinder bottom is connected and communicated with blanking tube, blanking tube outer wall is fixedly connected with control valve one.The utility model is by flow transmitter and is sent to the inside of blanking cylinder with various raw materials according to proportion, then falls into the inside of sleeve through blanking port of blanking cylinder, finally is sent to the inside of cylinder by screw conveying rod, reaches the effect of accurate control amount.

The utility model discloses an anti-bumping apple picking machine, which relates to the technical field of apple picking and comprises a base, driving rods are rotatably connected to two sides of the top end of the base, a connecting rod is hinged to one end, far away from the base, of each driving rod, and a clamping plate is fixedly connected to the other end of each connecting rod. Buffer plates are arranged on the opposite sides of the clamping plates, a plurality of buffer springs are fixedly connected between the clamping plates and the buffer plates, a button is installed at the center position of the side, close to the buffer plates, of each clamping plate, a touch block is installed on the side, close to the clamping plates, of each buffer plate, and the touch blocks are matched with the buttons; through the combined action of good elasticity of rubber and the buffer springs, the apple picking device can effectively absorb and disperse impact force during clamping, direct rigid collision between apples and the clamping plates is avoided, the damage probability of the apples in the picking process is greatly reduced, the appearance and quality of the apples are guaranteed, and the commodity value of the apples is improved.

The utility model discloses a tinned copper clad steel wire heat treatment device, including heating furnace, the right side fixed mounting of heating furnace has circulating fan, the air outlet pipe of circulating fan extends to the inside communication of heating furnace's downward exhaust pipe, the top communication of exhaust pipe has the air outlet head, the back of heating furnace inner chamber is installed spiral heating tube, the front of spiral heating tube is installed and is connected to the heat conduction fin, and the left end of spiral heating tube extends to the outside fixed mounting of heating furnace and is installed heater. The utility model discloses through circulating fan cooperation spiral heating tube and heat conduction fin, forms hot -blast circulation system, ensures the evenness of furnace temperature field, avoids the partial overheating of wire rod, and rotating disc, limit post and vertical rod constitute the rotating type wire rod fixed establishment, can drive wire rod uniform speed rotation, guarantees heat treatment consistency, and temperature detector real -time feedback temperature data, combines the adjustment of air vent and sealing door, realizes the accurate control of heat treatment process.

This utility model discloses a high-efficiency and energy-saving steam generator for pasta processing, including a support frame. A generating mechanism is mounted on the support frame. The generating mechanism includes a cylinder, a water tank, a water injection pipe, an external pipe, a material tank, and an outer cover. A pressure relief mechanism is located at the top of the cylinder. The pressure relief mechanism includes a support pipe, a pressure relief sleeve, an inlet pipe, a sliding rod, a sealing plate, a pressure spring, a contact ring, an adjusting sleeve, a rotating sleeve, a screw, a transmission sleeve, and a positioning mechanism. The support pipe is located on the top surface of the cylinder and connected to the water tank. The pressure relief sleeve is installed inside the support pipe, and the inlet pipe is located at the bottom of the pressure relief sleeve. When the steam pressure inside the cylinder is too high, the pressure pushes the sealing plate through the inlet pipe, overcoming the preset force of the pressure spring, thus forming a flow channel between the sealing plate and the inlet pipe, allowing the pressure to be released smoothly. At this time, the pressure relief sleeve discharges excess pressure, avoiding the risk of equipment damage or dangerous leakage due to excessive pressure in the steam generator.

This invention discloses a sliding mode control method for a force feedback manipulator, comprising the following steps: Step 1, establishing a kinematic model and a dynamic model; Step 2, determining the state-space expression of the force feedback system; Step 3, designing the sliding surface; Step 4, performing stability analysis of the force feedback system; Step 5, determining the conditions that the sliding mode control law should satisfy; Step 6, controlling the force feedback manipulator. Compared with existing force feedback manipulator control methods, this invention adopts a sliding mode control method, which can dynamically change according to the current state of the system to achieve the system moving according to a preset sliding mode trajectory. It has good adaptability and robustness, can reduce the interference of disturbance factors on the dynamic model, and achieve precise control. Furthermore, the sliding mode control method only requires adjusting two parameters, making adjustment more convenient and simple, and improving the design efficiency of the control method.

The utility model discloses a kind of multi-section temperature control coil of diesel cracking reactor, belong to petroleum chemical equipment technical field, it includes bearing assembly, filter component and flow rate component, three are sequentially fluidly communicated;Filter component is used to remove solid impurities in oil gas on line, flow rate component includes the sliding plate driven by electric push rod, sliding plate is rotated in the valve plate in hollow disc by rotating column, realizes the automation accurate adjustment of flow rate.The utility model is closely integrated by high-efficiency on-line filtering and accurate automatic flow rate control function, effectively solve the problem that the equipment operation is unstable, product quality fluctuation caused by the impurity blockage and flow rate control inaccuracy in prior art, significantly improve the quality and yield of cracking product, enhance the reliability of system, and make equipment maintenance more safe, convenient.

The invention relates to a preparation method and application method of a copper-based catalyst for electrochemical CO2 reduction, and the preparation method of the copper-based catalyst for electrochemical CO2 reduction comprises the following steps: S100: obtaining copper powder, dissolving the copper powder in a solvent, and ultrasonically mixing uniformly to obtain a copper-based mixed solution; and S200, the copper-based mixed solution is transferred into a high-pressure kettle to be heated, after the temperature rises to the preset temperature, CO2 gas is introduced into the high-pressure kettle till the high-pressure kettle is in a supercritical state, constant-temperature reaction is conducted for 3-24 h, the high-pressure kettle is cooled to the room temperature, then centrifugation is conducted, solid at the bottom is taken, washing and drying are conducted, and the copper-based catalyst for electrochemical CO2 reduction is obtained.

This invention provides a control method for a cleaning robot and a cleaning robot itself. The cleaning robot is suspended on one side of a work surface and moves up and down along the work surface. The control method includes: detecting whether there are obstacles on the work path during the cleaning robot's operation along the work surface; if so, acquiring the characteristic parameters of the obstacle; determining the obstacle-crossing method of the cleaning robot based on the characteristic parameters; the obstacle-crossing method includes: traversing the obstacle and rolling over the obstacle; and controlling the cleaning robot to cross the obstacle according to the obstacle-crossing method. The technical problem solved by this invention is that although cleaning robots in related technologies have a certain obstacle-crossing ability, their obstacle-crossing methods are relatively simple and cannot flexibly select different obstacle-crossing strategies according to the actual situation of the obstacle; for example, for slight obstacles that do not require lifting, the robot still performs complex lifting actions, resulting in reduced work efficiency and increased energy consumption.

The utility model relates to a magnetic powder spraying related technical field especially relates to a kind of magnetic powder spraying device for ship anchor chain crack detection, including bottom plate, the upper end of bottom plate is equipped with push rod, the bottom of bottom plate is equipped with universal wheel, the upper of bottom plate is connected with magnetic powder storage tank, the other end of the upper of bottom plate is connected with lifting frame, the inside of magnetic powder storage tank is provided with stirring assembly, the bottom side of magnetic powder storage tank is connected with discharge pipe, the surface of lifting frame is provided with spraying device.This kind of magnetic powder spraying device for ship anchor chain crack detection, through the setting of spraying device, the automation and precision control of magnetic powder spraying are realized, micro pump accurately controls magnetic powder suspension delivery capacity, cooperates multiple groups of encircling type spray head, can be preset parameter stable output magnetic powder, avoids the problem of uneven spraying due to manual operation strength, angle deviation.

The invention relates to the technical field of unmanned aerial vehicle sampling and water area ecological environment quality monitoring, in particular to a mobile self-organizing relay communication unmanned sampling method and system for a wide water area. Comprising a mobile vehicle-mounted console, a mobile self-organizing multistage relay communication link formed by a plurality of unmanned ships, and a collaborative operation unit formed by sampling unmanned aerial vehicles. The unmanned ships are connected end to end according to specific intervals, the signal radiation ranges of the unmanned ships are mutually overlapped, and the unmanned ships are automatically networked to form a continuous communication chain extending to a far-shore wide water area. The sampling unmanned aerial vehicle firstly stably hovers at a first hovering height and then vertically descends to a second hovering height to execute accurate sampling, and after sampling is completed, an automatic return flight instruction is triggered to achieve sample recovery. According to the invention, by constructing the dynamic self-organizing node network and state feedback closed-loop control, the bottleneck of signal transmission and collaborative operation capability of the unmanned aerial vehicle in a wide water area is solved, and large-range, high-efficiency and high-precision automatic unmanned sampling is realized.

This application relates to a prefabricated smart plant cultivation box and its control method, which includes a planting pot, a water tank, a filter assembly, a soil sensor, an equipment room, and an intelligent control assembly. This application achieves automated monitoring and precise control of the entire plant growth cycle through deep collaboration of multi-sensor fusion and intelligent algorithms. The system can collect environmental parameters such as temperature, humidity, and light, as well as soil nutrients and plant morphological characteristics in real time. Through big data analysis technology, it quickly identifies growth anomalies, such as water shortage, nutrient deficiency, or pest and disease risks, and automatically generates targeted maintenance strategies. This integrated design eliminates the cumbersome process of manual observation and experience-based judgment in traditional plant cultivation, allowing even non-professional users to easily achieve scientific plant management, significantly lowering the maintenance threshold and improving plant survival efficiency.

The invention relates to the technical field of data processing, and discloses a pepper planting area soil nutrient assessment generation method based on big data analysis, and the method comprises the steps: integrating remote sensing data, soil sampling point actual measurement data, topographic data and crop growth data of a target pepper planting area into multi-modal characteristic parameters; constructing a soil nutrient characteristic spectrum; analyzing a spatial mode of the soil nutrient characteristic spectrum, and simulating a time sequence evolution trend of the soil nutrient characteristic spectrum to obtain a soil nutrient current situation diagnosis result and short-term evolution trend early warning; determining dominant restrictive nutrient factors; differentiated strategy optimization is carried out on the nutrient deficiency area and the nutrient excess area, and a scenario nutrient management prescription is obtained; performing inversion evaluation on the implementation effect by applying the scenario nutrient management prescription, and performing synchronous calibration on a preset expert knowledge base; according to the method, the efficiency of evaluating and generating the soil nutrients in the pepper planting area based on big data analysis can be improved.

The application belongs to the technical field of VOCs detection, and particularly relates to a VOCs component detection system. Sample gas enters an enrichment unit from a sample gas port for enrichment; first carrier gas passes through the enrichment unit after a four-way valve, washes out the gas adsorbed in the enrichment unit, flows into a separation assembly for separation, and then enters a PID detector for detection analysis; after analysis, the carrier gas carrying atomized water and dry carrier gas are used for reverse blowing in sequence, and then the next round of test can be performed. The application adopts a low-heat-capacity chromatographic column and a high-sensitivity PID detector, effectively reduces the volume and energy consumption of the device through EPC control, and effectively improves the applicability of using a portable device to detect a wide spectrum of VOCs; humidification reverse blowing and dry sweeping are set, low-boiling-point species, oxygen-containing VOCs and nitrogen-containing VOCs that are difficult to remove in the traditional way can be effectively removed through humidification reverse blowing, background interference is reduced, and the VOCs detection effect is effectively improved.

The application provides a low-temperature drying system and a balance adjustment method with heat and cold balance adjustment functions, which can adjust the actual supplied heat and cold according to the required heat and cold, realize accurate control of the heat and cold, and further improve the drying condensation effect and efficiency of the low-temperature drying system. In the low-temperature drying system, a hot water pump and a valve A are sequentially arranged on a hot water pipeline between a heat exchanger and a low-temperature drying system heat exchange module heater; a cold water pump and a valve B are sequentially arranged on a cooling water pipeline between a cooling tower and a low-temperature drying system heat exchange module cooler; a temperature and humidity sensor A is arranged on a return air pipeline of the heat exchange module and used for monitoring the temperature and humidity of return air; temperature and humidity sensors B are arranged on air inlet and outlet pipelines of the cooler and used for measuring the temperature and humidity of air before and after the cooler.

The utility model relates to charging terminal equipment technical field discloses a floor type direct current charging terminal equipment, including organism, the front of organism is provided with the transverse board, installs the charging gun adjusting mechanism on the transverse board, and the charging gun adjusting mechanism includes mobile module, and the mobile module mobile end is connected with mobile gun seat, and the mobile gun seat installs multiple sets of charging guns, and each set of charging gun tail end is connected with the organism through charging cable. The design of setting multiple sets of charging guns effectively improves the charging efficiency of charging station, and relieves the charging resource shortage problem of peak period. At the same time, through the setting of charging gun adjusting mechanism, the position of charging gun can be adjusted according to actual demand, and the flexibility of charging station and the use convenience of user are enhanced. In addition, the utility model still realizes the accurate control to the charging process through the cooperation of control host computer, voltage detection module, current detection module and temperature detection module, and effectively guarantees the safety and stability of charging.

The utility model relates to power drive system technical field especially fuzzy control rotary power drive system, including pump control module, flow pressure control module and wheel module that communicate in proper order, flow pressure control module is used for according to wheel module's load to control pump control module flow delivery, pump control module includes oil tank, main pump and flow regulation actuating mechanism, when using, flow pressure control module according to wheel module's load to control pump control module's flow regulation actuating mechanism, reach control main pump flow output flow, realize to steering system and time flow and pressure compensation, and enough satisfy big load, the occasion of speed demand variable big, and can according to actual working condition to the ability of output characteristic carries out self -adaptation adjustment, steering motor control is smooth, only can satisfy basic steering drive demand, can also in the emergence such as pit, make the vehicle have autonomous ability, ensure that the vehicle runs stably reliable.

The invention relates to the technical field of solar cells, in particular to a photovoltaic cell assembly and a preparation method thereof.The preparation method comprises the following steps that a cell piece is prepared, specifically, a silicon wafer with the half size serves as a raw material, selective patterning etching is conducted on the front face and the back face of the textured silicon wafer to form two grooves, and the width of the groove in the front face is smaller than that of the groove in the back face; and sequentially plating an amorphous silicon / microcrystalline silicon thin film and a transparent conductive film, removing the transparent conductive film in the groove, and then carrying out subsequent steps and slicing. And assembly manufacturing: the groove processing position is located below the non-groove processing position of the other battery piece during series welding of the battery assembly. The grooves are arranged in the fragmentation areas of the front and back surfaces of the battery piece, so that the phenomenon that the transparent conductive film is not thoroughly removed by etching slurry or laser or the amorphous / microcrystalline layer is damaged can be well avoided.

The application provides a polyether ether ketone microfiber and a non-woven material preparation method and device, and belongs to the technical field of special fibers and non-woven materials, and the preparation method comprises the following steps: inputting current extrusion process parameters into a pre-trained long short-term memory network model to obtain predicted melt viscosity; processing polyether ether ketone resin raw materials to obtain a polyether ether ketone melt; obtaining a spinneret temperature target setting value and an extrusion rate target setting value according to fiber diameter data and preset target fiber diameter data; processing the polyether ether ketone melt based on the spinneret temperature target setting value and the extrusion rate target setting value to obtain polyether ether ketone nascent fibers with a diameter deviation amount meeting a first preset condition; and adjusting stretching process parameters according to a target product type to process the polyether ether ketone nascent fibers according to the adjusted stretching process parameters to obtain polyether ether ketone microfibers with a diameter meeting a second preset condition. The application improves the consistency of the prepared material.

The invention discloses a millimeter wave reflector antenna back frame actuator layout optimization design method. The method comprises the following steps: (1) establishing a finite element model of an antenna; step (2), applying an actual working condition load for simulation analysis, and outputting global deformation coordinate data of an antenna paraboloid; (3) discrete distribution of antenna surface errors is obtained; (4) decomposing the surface error of the antenna into a Zernike polynomial mode; (5) determining the initial layout of the actuator; step (6); obtaining an evaluation function; (7) constructing an evaluation function optimization model; (8) establishing a layout optimization model; (9) deleting an actuator with the minimum contribution degree based on the evaluation function and the contribution degrees of the actuators; step (10), updating the contribution degree of the actuator for the updated optimized layout of the actuator; and (11) calculating whether the evaluation function reaches the standard or not, and executing iteration or termination logic. According to the invention, profile precision and layout advantages and disadvantages can be accurately associated; and the optimal layout of the actuator is realized.

This application relates to a power supply control circuit and power supply system, including a relay module, a first detection module, a first timing module, and a control module. The relay module is configured with an engaged state and a reset state. The relay module is connected to a power conversion module and a power grid. In the engaged state, the relay module connects the power supply path between the power conversion module and the power grid; in the reset state, it disconnects the power supply path between the power conversion module and the power grid. The first detection module is connected to the power grid to output a first detection signal at the zero-crossing point of the power grid voltage. The first timing module is connected to the first detection module and starts timing for a first preset duration upon triggering by the first detection signal, and outputs a corresponding first timing signal. The control module is connected to both the relay module and the first timing module, receives the first timing signal, and outputs a corresponding control signal to control the relay to be in the engaged state. This application can improve the power supply security of the power supply system.

This invention provides a branch sheath, comprising: a covered cannula, a first connecting tube, a control wire, and a restraint coil. The covered cannula has several drainage holes on its wall to mitigate the impact of blood flow resistance on the delivery and positioning of the branch stent during stent introduction and release, while also reducing complications caused by poor blood flow. The covered cannula is located distal to the first connecting tube; the control wire passes through the first connecting tube, with its distal end located within the covered cannula; the proximal end of the restraint coil is connected to the distal end of the first connecting tube, and the distal end of the restraint coil passes through and extends out of the bare end opening of the branch stent; the portion of the control wire passing through the bare end opening of the restraint coil pulls and fixes the bare end of the branch stent, thereby allowing the branch stent to be pulled back into the branch vessel at any time after it has detached from its predetermined position during the procedure, preventing displacement of the branch stent due to the pull of the main stent, and achieving precise control of the release position.