148results about How to "Reduce control difficulty" patented technology

The invention discloses a multi-parameter coordinated temperature control method and related equipment. The method comprises the following steps: acquiring historical parameter information of a drying system; analyzing the historical parameter information to obtain an influence rule among multiple parameters of the drying system; real-time operation parameters of the drying system are obtained, and a multi-parameter coordination control strategy of the drying system is determined based on the real-time operation parameters and the influence rule; and controlling the drying system based on the multi-parameter coordination control strategy so as to control the temperature of the drying system. The problems that an existing material drying device is basically in a pure manual control state, the complexity of the drying process is increased due to manual control, the control difficulty is high, and the drying efficiency is low are solved.

The invention discloses a frequency control method and system for an offshore wind power flexible low-frequency sending-out system, and relates to the technical field of power system frequency supporting. The working condition parameters are subjected to power frequency coordinated optimization control through a power frequency side control model to obtain a power frequency control instruction and a target system frequency, and the target system frequency and the working condition parameters are subjected to low-frequency coordinated optimization control through a low-frequency side control model to obtain a low-frequency control instruction; and performing frequency support optimization control on the frequency of the wind turbine generator through the active frequency support control model to obtain an additional power instruction, and performing power control on the offshore wind power flexible low-frequency sending-out system by adopting a power frequency control instruction, a low-frequency control instruction and the additional power instruction. The technical problems that the actual frequency deviates from a rated working point and the system control difficulty is increased due to the fact that the frequency control of the system is realized through the flexible low-frequency grid-connected frequency coordination control system by offshore wind power in the prior art are solved.

The invention relates to the technical field of comprehensive treatment of industrial solid wastes, and particularly discloses a comprehensive utilization method of secondary aluminum ash, which specifically comprises the following steps: deoxidizing the secondary aluminum ash; carrying out hydrolysis treatment on the deoxidized secondary aluminum ash, and carrying out solid-liquid separation to obtain mixed gas, a hydrolysis slurry solid phase and high-salt-alkali ammonia nitrogen hydrolysate; separating and purifying the mixed gas to obtain hydrogen; carrying out at least two times of acid washing treatment and at least one time of alkali washing treatment on the hydrolyzed slurry solid phase to obtain a solid phase product for the concrete admixture; and carrying out ammonia-nitrogen separation on the high-salt-alkali ammonia-nitrogen hydrolysate, and carrying out gradient acidification treatment to obtain aluminum hydroxide and inorganic salt crystals. By implementing the method, high-added-value overall utilization of the secondary aluminum ash can be realized.

The invention discloses an adjustable deck supporting device for floating mounting of a maritime work platform, and belongs to the technical field of ocean platform mounting, the adjustable deck supporting device comprises a supporting base plate, a supporting platform, a bearing hydraulic cylinder, a universal butt joint mechanism, a butt joint device and a three-degree-of-freedom adjusting balance cylinder set, and a via hole is formed in the center of the supporting platform; the bearing hydraulic cylinder is correspondingly arranged in the center of the supporting base plate. The universal butt joint mechanism is correspondingly hinged to the top end of a hydraulic rod of the bearing hydraulic cylinder, and the universal butt joint mechanism penetrates through the via hole and extends out of the supporting platform; the butt joint device is correspondingly arranged at the top end of the supporting platform and is spherically hinged to the universal butt joint mechanism; the three-degree-of-freedom adjusting balance cylinder sets are evenly distributed in the circumferential direction of the bearing hydraulic cylinder, and the supporting platform and the structure on the supporting platform are allowed to be adjusted in a space in a multi-angle rotating mode. The device can bear upper modules with large weight, has the wave compensation capability, improves the floating mounting and butting efficiency, improves the working efficiency of load transfer, and reduces the offshore operation time.

The invention relates to the technical field related to drilling machines, in particular to a mining drilling machine and a drilling rod assembling and disassembling method. Comprising a lifting frame and a drill rod box, a plurality of containing grooves are formed in the drill rod box, a clamping unit is arranged, the clamping unit comprises a transverse moving assembly, a lifting assembly and a transfer manipulator, the transverse moving assembly and the lifting assembly drive the transfer manipulator to move in the transverse direction and the vertical direction correspondingly, and the vertical projection of the transfer manipulator is located in the drill rod box; the transfer manipulator is used for clamping the drill rod and can rotate; the lifting frame comprises a lifting sleeve, and a through hole allowing a drill rod to penetrate through is formed in the lifting sleeve. An overturning mechanical arm is arranged on the side, away from the transfer mechanical arm, of the lifting frame, the clamping center of the overturning mechanical arm is opposite to the through hole, and the overturning mechanical arm is used for driving the drill rod to rotate to the coaxial line of the driving drill rod. According to the mining drilling machine, the width of the drilling machine can be reduced.

The invention discloses a display screen with a metal frame and a gluing device thereof.The display screen with the metal frame comprises a bottom shell and a screen body assembly, the bottom shell comprises the metal frame, the inner wall of the metal frame is provided with a supporting protruding edge extending towards the inner side, the screen body assembly is placed in the bottom shell and supported by the supporting protruding edge, and the top face of the supporting protruding edge is provided with a glue groove; the metal frame comprises a first side edge and a second side edge which are oppositely arranged, the outer wall of the first side edge is provided with a glue injection hole communicated with the glue groove, the outer wall of the second side edge is provided with an exhaust hole communicated with the glue groove, the exhaust hole is obliquely formed, the end, away from the glue groove, of the exhaust hole is an exhaust opening, and the lower edge of the exhaust opening is higher than the top face of the supporting protruding edge. The depth of the glue groove is gradually increased from the area communicating with the glue injection hole to the area communicating with the exhaust hole, and the glue groove is used for pouring glue liquid making contact with the bottom face of the screen body assembly. The display screen with the metal frame is low in glue injection amount control difficulty and convenient to produce.

The invention discloses a welding device. The welding device comprises a frame body; the first moving module is mounted on the frame body and can move in the first horizontal direction; the second moving module is installed on the first moving module and can move in the second horizontal direction perpendicular to the first horizontal direction; the third moving module is mounted on the second moving module and can move in the vertical direction perpendicular to the first horizontal direction and the second horizontal direction; and the welding module is installed on the third moving module and can move along with the first moving module, the second moving module and the third moving module, the welding module is suspended outside the frame body, and the first moving module is arranged in the inner cavity of the frame body so as to reduce the distance between the welding module and the frame body. Therefore, the welding device has good rigidity and stability, and the welding precision can be improved. In addition, the welding flux device adopts modular design, the moving structure is simplified, the control difficulty is reduced, and the welding flux device can be suitable for various production lines.

The present application discloses a regulating valve, a humidifier and a fuel cell system, wherein the regulating valve comprises: a core cavity and a first flow channel, a second flow channel and a third flow channel respectively connected to the core cavity are provided in the valve seat, a first valve seat opening connected to the first flow channel, a second valve seat opening connected to the second flow channel and a third valve seat opening connected to the third flow channel are provided in the valve seat, and the first valve seat opening and the second valve seat opening are located on the same side of the valve seat; a valve core is rotatably arranged in the core cavity, and a first valve opening and a second valve opening are provided in the valve core that are connected to each other, and the valve core rotates relative to the valve seat so that the first valve opening is connected to the first flow channel or the second flow channel correspondingly, and the second valve opening is used to connect to the third flow channel. Two flow channels that can be adjusted to be on and off are formed in the valve seat, and the first valve seat opening and the second valve seat opening are connected to the humidifier at different positions, and the cathode reaction gas flows through different lengths of the path, so that the cathode reaction gas has different transmission efficiencies with the humid and hot tail gas, thereby achieving the adjustment of the humidity of the cathode reaction gas.

The invention relates to the technical field of industrial robots, in particular to a simple industrial robot and a working method thereof.The simple industrial robot comprises a first sliding rail, a second sliding rail, a manipulator assembly and a rack assembly; the rack assembly comprises a rack, a spring and a check block, the rack is slidably arranged in the second sliding rail, one end of the spring is connected with the end of the rack, and the other end of the spring is connected with the check block. The manipulator assembly comprises a base, a rotating shaft, a gear, a mechanical arm and a limiting block, and the gear is meshed with the rack; the stability of the position of the rack is kept before extrusion through proper selection of elasticity modulus in the front stroke, so that rotation of the gear is achieved, linear movement of a workpiece rotating in place to a matched structural body can be completed along with synchronous movement of the rack and the gear in the rear stroke, and based on the mechanical linkage, angle transfer of the workpiece can be conducted as needed; and the cost is effectively reduced in a production line scene of reaching an assembly position through a linear path after transferring, and the control difficulty can also be effectively reduced through a mechanical linkage mode.

The embodiment of the invention provides a smart home management method and device, electronic equipment and a storage medium, and relates to the technical field of smart home, and the method comprises the steps that edge equipment obtains first equipment data of smart home equipment, carries out the analysis processing of the first equipment data, and obtains first visual data corresponding to the smart home equipment; the AR device receives first visual data sent by the edge device, displays a management interface corresponding to the smart home device in an augmented reality scene according to the first visual data, and obtains operation data corresponding to a control operation in response to the control operation for the smart home device; the edge device analyzes the operation data, generates a target control instruction for the smart home device, and sends the target control instruction to the smart home device; and the smart home equipment executes the equipment operation corresponding to the target control instruction, so that the control real-time performance and the control efficiency of the smart home equipment are ensured, and the control difficulty is reduced at the same time.

The invention relates to the field of automatic racks, and discloses a direct rotation type drill rod conveying system and a control method. The direct rotation type drill rod conveying system comprises a drill rod box used for storing drill rods and a transfer manipulator used for converting the axes of the drill rods to be perpendicular to the rotating plane of the rack; the drilling manipulator is arranged on the side face of the drill rod box in a sliding mode and provided with a drill rod positioning sensor, a lifting positioning sensor and a telescopic positioning sensor, through the special arrangement of the transfer manipulator, the drill rod positioning sensor is used for detecting the existence of a drill rod and measuring the height of a pile castellated position of the drill rod; the position of the clamping jaw is comprehensively judged through the lifting positioning sensor and the telescopic positioning sensor, the processor can conveniently judge the displacement of the clamping jaw needing to extend, the clamping process is more accurate, and the probability of drill rod sending collision is reduced.

The invention provides a leaky-wave antenna and a frequency-modulated continuous wave generation method based on the leaky-wave antenna, and relates to the field of millimeter-wave radar, and the method comprises the steps: constructing a space-time coding matrix, configuring a radiation unit state regulation and control beam direction in a space domain, modulating a radiation unit state switching rule in a time domain to generate a frequency-modulated continuous wave, and achieving space-time dual-domain regulation and control. And frequency-modulated continuous waves with controllable bandwidth are generated. The space-time coding leaky-wave antenna is formed by alternately arranging 1-bit radiation units in an upper row and a lower row, switching of radiation / non-radiation states is achieved by loading a synchronous bias PIN diode across an annular gap, a space-time coding matrix is constructed, the states of the radiation units are configured in a space domain to regulate and control the wave beam direction, and the space-time coding leaky-wave antenna is formed. Modulating the switching rule of the radiation unit in a time domain, and generating a frequency-modulated continuous wave; the radiation efficiency is improved by the alternative arrangement of the radiation units, the control difficulty and the hardware cost are reduced, multiple functions are integrated into a single device, and the problem of low integration level of the traditional separation architecture is solved.

The utility model discloses an anti-shake focusing driver and a camera module, and belongs to the technical field of camera modules. The anti-shake focusing driver comprises a focusing base; the anti-shake base is movably arranged in the focusing base; the focusing driving assembly is connected between the focusing base and the anti-shake base so as to drive the anti-shake base to move along the optical axis direction of the lens; the anti-shake carrier is movably arranged in the anti-shake base, and the moving direction of the anti-shake carrier is configured to be the orthogonal direction of the optical axis; the anti-shake driving assembly comprises an anti-shake magnet and an anti-shake coil, the driving magnet is arranged on the anti-shake base, the anti-shake coil is arranged on the anti-shake carrier, and the driving magnet and the anti-shake coil are oppositely arranged; and the driving circuit is connected with the focusing driving assembly and the anti-shake coil so as to control the focusing driving assembly and the anti-shake driving assembly to act by controlling driving signals loaded on the focusing driving assembly and the anti-shake coil. According to the anti-shake focusing driver and the camera module provided by the invention, the anti-shake effect can be improved.

The invention provides a self-cleaning ceramic membrane security filtration system. The self-cleaning ceramic membrane security filtration system comprises a ceramic membrane security filter; the ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a plurality of internal pressure type ceramic membrane tubes are mounted between the bottom flow guide disc and the top flow guide disc; the water inlet pipe communicates to the bottom of the bottom shell; the water collecting tank is connected with the filter cavity through a connecting pipe; the elevation of the water inlet end of the water inlet pipe is higher than that of the top flow guide disc; the ceramic membrane security filtration system further comprises a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is communicated with the top of the upper cover, the vertical pipe section is communicated with the inclined pipe section, and the vertical pipe section extends downwards to the ground in the vertical direction; a siphon destroying hopper is mounted in the water collecting tank and is communicated with a connecting point of the inclined pipe section and the vertical pipe section through a siphon destroying pipe; and the maximum water level elevation of the water collecting tank is higher than that of the siphon breaking bucket. According to the invention, completely automatic filtration and self-cleaning of the internal pressure type ceramic membrane tube are realized.

The invention relates to a two-shaft rotating motor framework which comprises a shell, a prism, a first support, a second support, a first fulcrum component and a second fulcrum component. The first fulcrum component comprises a main component providing the first shaft and an auxiliary component arranged far away from the main component; a second fulcrum member disposed between the second bracket and the housing to provide a second axis; the distance between the intersection point of the first shaft and the second shaft in space and the bottom of the shell is larger than or equal to the distance between the main component and the bottom of the shell. According to the invention, the coverage range of the supporting structure of the first bracket can be effectively expanded, and the first fulcrum component has a larger available installation area, so that the influence of the gravity torque of the prism can be better offset; and rotation in the Z direction is completed through the second support, so that the distance between the rotating pieces is increased, and the precision and stability of rotation in the Z direction are improved.

According to the welding rod capable of being subjected to post-welding stress relief heat treatment, the preparation method and the deposited metal, the requirement for controlling the purity of the core wire is not high, the cost is low, all alloying elements in coating transition can achieve control and adjustment of the alloying level through coating transition, the welding efficiency is improved, the production cost is reduced, and the welding quality is improved. The method has the advantages of being simple in manufacturing process, low in manufacturing cost, high in welding efficiency and high in welding seam toughness, and can fully adapt to the process of post-welding stress relief heat treatment.

The invention relates to the field of lamps, and discloses a light guide part, a lamp and a carrier, the light guide part comprises at least two light guide sections which are arranged in sequence, and every two adjacent light guide sections are connected through a connecting section; wherein each light guide section is provided with a light inlet part and a light outlet part, the light inlet parts are used for allowing light of the light-emitting assembly to enter the light guide sections, the light outlet parts are used for allowing the light of the light guide sections to be emitted, and the connecting sections are configured to limit at least part of the light to be transmitted between the two adjacent light guide sections. The light guide part is designed to be of the structure that the at least two light guide sections and the connecting sections are alternately connected, independent segmented control over all the light guide sections can be achieved, for example, the on-off states of different light guide sections are independently adjusted, or differentiated color output of all the light guide sections is achieved, the problem that a traditional light guide part is single in light emitting effect is effectively solved, and the light guide part is more convenient to use. And diversified and differentiated light emitting requirements are fully met. The connecting sections can effectively limit light transmission between the adjacent light guide sections, and the light crosstalk phenomenon is avoided.

According to the split type optical satellite platform oriented to the multiple application modes, physical isolation of the load cabin and the service cabin is achieved through the innovative composite Lorentz force executing mechanism, and interference of vibration of the service cabin on the load cabin is effectively isolated. The composite Lorentz force actuating mechanism not only solves the nonlinear problem and the collision avoidance problem of a traditional actuating mechanism during rotation and large-angle maneuvering, but also has the advantages of being compact in structure, low in control rate, high in response speed, high in output force precision and the like. The platform supports multiple modes such as earth three-axis high-stability imaging, rotary optical imaging and large-angle maneuvering, and the on-orbit application efficiency of an optical satellite is remarkably improved. According to the invention, a new progress of the spaceflight technology in the aspects of high precision and high agility control is displayed, and powerful support is provided for future space tasks.

This utility model discloses an adjustable two-dimensional tail nozzle, belonging to the field of two-dimensional tail nozzle technology; it includes a connected engine and an adapter casing. A servo is provided on one side of the adapter casing. The output side of the adapter casing consists of a rectangular opening formed by two oppositely arranged fixed plates and two oppositely arranged adjusting plates. A power arm is provided at the output end of the servo. The right end of the power arm is connected to two parallel first connecting rods by a pin shaft. The other ends of the two first connecting rods are respectively connected to two second connecting rods. It can be applied to small afterburning turbojet engines to improve the flight speed of UAVs. Its structure is simple. The synchronous opening and closing movement of the adjusting plates is achieved through a single servo drive source, reducing the control difficulty, realizing engine thrust adjustment, reducing the number of structures, and making it lightweight, highly reliable, and low in cost. By setting a support rod on the outside of the adjusting plate, the adjusting plate can be limited. The structure is simple and the use effect is good.

This utility model relates to an intelligent water temperature control module, characterized by comprising a flow regulation module, a pressure balancing module, and a temperature control module. The flow regulation module includes a first valve seat and a flow regulating valve core. The first valve seat has a first cold water inlet channel, a first hot water inlet channel, a flow regulating valve core mounting cavity, a first cold water outlet channel, and a first hot water outlet channel. The pressure balancing module includes a second valve seat and a balancing valve core. The second valve seat has a second cold water inlet channel, a second hot water inlet channel, a balancing valve core mounting cavity, a second cold water outlet channel, and a second hot water outlet channel. The temperature control module includes a third valve seat and a temperature control valve core. The third valve seat has a third cold water inlet channel, a third hot water inlet channel, a temperature control valve core mounting cavity, a mixing chamber, and a mixed water outlet channel. Each module exists independently and is independently controlled, simplifying the control method, reducing control and manufacturing difficulty, improving the control accuracy of water flow and temperature, and allowing for selection and combination of different modules.

The invention discloses a micro-flow fluid medium flow temperature control system, a temperature control method and an electrolytic bath, and the system is characterized in that a multi-stage temperature control strategy is adopted on a fluid medium circulation loop, and a cooling device and double heaters are combined; the plurality of temperature measuring devices are respectively arranged at the outlet of the cooling device, the outlets of the double heaters and the inlet of the heated component; the system further comprises a PID controller, the PID controller is connected with the cooling device, the double heaters and the multiple temperature measuring devices, the PID controller adjusts power output of the heaters, the heat dissipation power and the heating power of outlets of the heaters and inlets of the heated parts are balanced, and the debugging efficiency and the system stability are improved.

The invention discloses a single-degree-of-freedom liquid crystal panel carrying mechanical arm and a carrying method thereof.The single-degree-of-freedom liquid crystal panel carrying mechanical arm comprises a driving base, the driving base is rotationally connected with one end of a large arm, and the other end of the large arm is rotationally connected with one end of a small arm; the other end of the small arm is rotationally connected with one end of the fork arm bearing mechanism, and the other end of the fork arm bearing mechanism is used for bearing a liquid crystal product to be transferred; and the driving relation between the articulated arms is determined through a method for determining the length of the arm lever of the single-degree-of-freedom liquid crystal panel carrying mechanical arm and the rotation angle of the corresponding arm lever. The invention discloses a single-degree-of-freedom liquid crystal panel carrying mechanical arm and a carrying method thereof. The single-degree-of-freedom liquid crystal panel carrying mechanical arm has the effects of being low in driving cost, small in movement inertia, small in control difficulty and high in movement precision of a single-degree-of-freedom articulated arm. And the tail end movement precision can be effectively guaranteed, and safe and efficient carrying of advanced-generation liquid crystal panels is achieved.

The utility model provides a fermentation box for baking food, which comprises an outer shell, an inner container mounted in the outer shell, a back plate arranged on the back of the inner container, a circulating fan mounted at the top of the back plate and communicated with the inner container, a partition plate mounted at the bottom of the back plate, and through holes uniformly formed in the partition plate and communicated with the inner container, a spraying device is installed behind the partition plate, an electric heating pipe is installed on the partition plate and located above the spraying device, the back cover is installed on the rear side of the back plate and seals the circulating fan, the spraying device and the electric heating pipe in the back cover, an inner installation plate is installed on one side of the inner container, a control box is installed on the inner installation plate, and a controller is installed in the control box. A temperature sensor and a humidity sensor are installed in the inner container. According to the fermentation box, spraying is used for replacing an electric heating pipe to heat and evaporate water in the water tank to control the humidity, low-temperature fermentation is facilitated, the control difficulty of the temperature and the humidity is also reduced, and the circulating fan is arranged, so that the temperature and the humidity in the fermentation box are uniformly distributed.

This invention relates to the field of agricultural intelligent equipment and machine vision technology, and discloses a method for weed detection and growth point localization based on shared features. The method constructs a collaborative dataset containing weed detection labels and growth point labels, utilizes a shared feature extraction network to extract multi-scale features, and sets detection task branches and growth point localization branches in a unified feature space to achieve joint modeling of weed detection and growth point localization. Then, adaptive positive sample selection is performed based on the joint cost between candidate sample points and labeled growth points, and joint training is conducted using detection loss, growth point localization classification loss, and growth point localization regression loss. During the inference stage, the method outputs weed detection results and growth point localization results, and generates target point information. This method can reduce redundant calculations and error cascading in the multi-stage processing, and improve the accuracy of growth point localization and the stability of target point output in complex farmland scenarios.

The invention discloses a positioning and measuring device for floor tile laying construction, and particularly relates to the technical field of measurement, the positioning and measuring device for floor tile laying construction comprises a positioning ring table and a horizontal detection unit arranged on the positioning ring table, and further comprises an adjusting plate which is arranged in the positioning ring table in an up-down moving manner, and an annular cavity is upwards formed in the positioning annular table from the bottom. The measuring frame and the multiple positioning units are matched to complete paving, positioning and measuring operation of the floor tiles, repeated debugging is not needed, meanwhile, installation is flexible, the device can be rapidly transferred to different floor tiles to complete follow-up auxiliary measuring work of floor tile paving, the construction efficiency is improved, the problem of repeated debugging and measuring is avoided, and the working efficiency is improved. Meanwhile, the positioning units have the protection function of the laser module, the laser module can be protected, and the single positioning unit does not need to be controlled independently and depends on synchronous control of the positioning ring table, so that the control difficulty is greatly reduced, and the overall operation is more convenient.

The invention relates to a solid fuel combustion characteristic test technology, and aims to provide a focusing single particle suspension variable atmosphere ignition combustion experiment device and method. A second microporous plate and a feed hopper are arranged at the top of a combustion chamber main body of the device, and a first microporous plate and a gas buffer cavity are arranged at the bottom; the two laser emitters are arranged in an included angle shape, and the energy of a single laser beam is lower than a fuel particle ignition threshold value; the two paths of laser intersect in the central area of the cavity to form a space energy focus, and the superposed energy of the two beams of laser can be absorbed at the position to reach an ignition threshold value; and light paths of diagnosis equipment in the optical acquisition module are intersected in a focus area. According to the invention, through a strategy of airflow disturbance and microwell plate blocking, particles completely move in airflow; the ignition behavior has spatial selectivity, the success rate is high and controllable, and the research is closer to the actual application scene. Through the design of single-particle fixed-point triggering, the system complexity and the control difficulty can be reduced, and the operation stability and the experiment repeatability can be improved.

The invention relates to the technical field of undercarriages, and discloses a double-actuator-cylinder retracting and releasing system and method for retracting and releasing an undercarriage, the double-actuator-cylinder retracting and releasing system comprises a driving cylinder, a follow-up cylinder and a control assembly, the control assembly comprises a guide pipe assembly and a one-way valve body, and the follow-up cylinder is provided with a follow-up cylinder extending lock assembly; the preset unlocking oil pressure A of the one-way valve body is larger than the preset unlocking oil pressure B of the follow-up cylinder extending lock assembly. The follow-up cylinder II is arranged to assist the driving cylinder I to stretch out and draw back, the supporting strength is improved, and occupied space is reduced; by arranging the one-way valve body 4, oil path crosslinking between the driving cylinder I and the follow-up cylinder II can be achieved, so that the unlocking sequence of the driving cylinder I and the follow-up cylinder II can be controlled, the situation that the extending sequence of the driving cylinder I and the follow-up cylinder II is disordered is avoided, the control difficulty is lowered, and the fault rate of the hydraulic control system is lowered.

This disclosure provides a circuit topology for a switching magnet power supply, used to provide excitation current to a magnet load, which is an inductive load. The circuit topology includes: a first voltage source, a second voltage source, a capacitor, a freewheeling diode, an insulated-gate bipolar transistor (IGBT), a resistor, and a blocking diode. The first voltage source, second voltage source, capacitor, and freewheeling diode are connected in parallel, and the IGBT is connected in series between the capacitor and the freewheeling diode. The voltage of the first voltage source is higher than that of the second voltage source. The first voltage source provides the excitation voltage, and the second voltage source serves as the power source. The first voltage source is connected in series with the resistor, and then in parallel with the series-connected second voltage source and the blocking diode. The capacitor and the freewheeling diode are connected in parallel across the series-connected second voltage source and the blocking diode, respectively. This circuit topology is simple, highly reliable, and has a short control time.

The utility model provides a computer sewing machine, and belongs to the technical field of sewing machines. The problem that an existing sewing machine is not high in sewing quality is solved. The computer sewing machine comprises a base, a needle plate with a needle falling hole and a rotating shuttle located below the needle plate, and further comprises a guide seat arranged in the base, a transmission shaft located below the rotating shuttle and a thread shifting rod which is in a C-shaped strip shape and is arranged around the periphery of the rotating shuttle. The transmission shaft is horizontally arranged in the front-back direction of the sewing machine and connected to the guide seat in a sliding mode, the lower end of the thread shifting rod is connected with the transmission shaft, and the transmission shaft can do reciprocating motion in the axial direction and do circumferential reciprocating rotation at the same time, so that the upper end of the thread shifting rod does circumferential circulating motion and can be located between the needle falling hole and the rotating shuttle. According to the design of the computer sewing machine, the control difficulty is reduced, the sewing error is obviously reduced, and the sewing quality is further improved.

The invention relates to the field of agricultural product processing equipment, in particular to a phase adjusting structure and an automatic adjusting tea frying machine based on the phase adjusting structure, the phase adjusting structure comprises a driving part and a transmission assembly, the transmission assembly comprises a transmission shaft, a connecting rod group and a swing rod, and the phase adjusting structure further comprises an eccentric wheel, the screw rod and screw sleeve adjusting mechanism is used for adjusting the distance between the fulcrum of the swing rod and the eccentric wheel, so that the initial angle and the swing amplitude of the frying plate are adjusted. The machine further comprises a rack, a controller and a frying plate; the synchronous belt transmission part is connected with the movable part; and the manual driving part and the automatic driving part are connected with the synchronous belt transmission part. The whole rigidity is effectively improved, vibration in the operation process is restrained, the repeated precision of the motion trail of the frying plate is guaranteed, the service life of the structure is prolonged, complexity and control redundancy of the mechanical structure are avoided, automatic adjustment is achieved, the machining efficiency is higher, and safety is higher.