107results about How to "Smooth switching" patented technology

The invention relates to a multi-shaft compressor unit and a control method thereof, in particular to a steam-electricity double-drive multi-shaft compressor unit connected with double clutches and a control method of the steam-electricity double-drive multi-shaft compressor unit. The technical problems that in the prior art, a pure electricity mode, a pure steam mode and a steam-electricity double-drive mode cannot be switched on line, and when steam is sufficient, a motor cannot be disengaged, so that energy is wasted are solved. The system comprises a multi-shaft compressor, a steam turbine, a motor, a first clutch, a second clutch, a steam flow sensor, a controller and a rotating speed sensor. The multi-shaft compressor comprises a driving shaft; the driving shaft is provided with two driving ends which are respectively a first driving end and a second driving end; the output shaft of the steam turbine is coaxially connected with the first driving end through a first clutch; an output shaft of the motor is coaxially connected with the second driving end through the second clutch; and rotating speed sensors are arranged on the first driving end, the second driving end, the steam turbine and the output shaft of the motor.

The invention discloses an automatic focusing method and device, computer equipment and a computer readable storage medium, and relates to the technical field of focusing. The method comprises the following steps: performing multi-target tracking detection on a preview image frame to obtain a face frame set, a human eye frame set and a multi-target tracking parameter; performing scale measurement aperture unification on the face frame set and the eye frame set to obtain a target face frame width and a target eye frame width; calculating a human face available threshold value and a human eye available threshold value; determining a depth-of-field coverage judgment result of the focusing target according to a depth map corresponding to the preview image frame; and according to the target face frame width, the target eye frame width, the multi-target tracking parameter after smoothing normalization, the depth-of-field coverage judgment result, the face available threshold and the eye available threshold, determining a focusing strategy to perform focusing switching. Therefore, the stability of the exported picture, the accurate focus and the smooth switching are ensured through automatic focusing.

A bifocal endoscope objective and endoscope, relating to the field of optical technology, includes a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power and movable along the optical axis from the object side to the image side, a fourth lens with positive optical power, a fifth lens with negative optical power, and a sixth lens with negative optical power, arranged sequentially along the optical axis from the object side to the image side. The objective has a total optical length ≤ 6.8 mm and a full field of view ≥ 160°. The third lens is configured to change the air gap between the third lens and the second and fourth lenses by moving it along the optical axis to a first axial position or a second axial position, respectively corresponding to a long-distance observation mode and a short-distance observation mode, while maintaining a constant total optical length during the switching process. This objective achieves stable bifocal switching with a constant total optical length during the switching process in an extremely compact structure.

The application belongs to the technical field of power management and battery power supply system, and specifically relates to an intelligent charging and discharging system with main and standby power supply switching and double-way output, which comprises an external power input module, a charging management module and an external power output module; the external power input module is used for connecting an external 5V power supply and comprises an anti-reverse connection / anti-backfill unit and an input filter unit; the charging management module is connected with the external power input module, is used for performing constant current / constant voltage charging on a single lithium battery, and provides a charging state indication output and a temperature detection input; through the cooperative design of external power effective determination, external power priority strategy and output retention capacitor / filtering, repeated switching caused by plug-in transient is inhibited, so that the drop and jitter of the system main power bus are reduced; the system main power bus does not have repeated jitter switching or the drop duration is significantly shortened when the external 5V is plugged in according to the engineering test caliber.

The application belongs to the field of integrated permanent magnet synchronous motor control system design, and particularly relates to an integrated permanent magnet synchronous motor open loop-closed loop switching control method and a control system. The open loop control is designed at the same time as starting the closed loop calculation. When the open loop output speed reaches the open loop-closed loop switching speed and the closed loop control output target speed reaches the open loop-closed loop switching speed, the open loop control is switched to the closed loop control, and the motor is controlled in the closed loop mode, so that the motor control speed fluctuation is small, the speed following property is good, and the switching process is smooth.

The utility model relates to the technical field of target switching devices, and discloses an automatic target switching device which comprises a fixing base, a connecting table is fixedly connected to the side wall of the fixing base, an arc-shaped sliding groove is formed in the connecting table, a motor is fixedly connected to the interior of the connecting table, and the output end of the motor is fixedly connected with a rotating frame. A moving assembly is arranged on the side wall of the connecting table and comprises a side rail, the side wall of the side rail is fixedly connected to the side wall of the connecting table, the side wall of the side rail is slidably connected with a sliding table, and a sliding shaft is slidably connected into the sliding table. According to the utility model, the rotating stand rotates and drives the connecting shaft to slide in the arc-shaped chute, and the sliding process of the connecting shaft drives the sliding block to move synchronously, so that the sliding shaft slides in the sliding table and pushes and pulls the sliding table at the same time, and the sliding table horizontally slides on the side wall of the side rail; and the sliding process is matched with a clamping structure at the top to realize automatic switching of the top target.

The application relates to a hybrid AC / DC microgrid based on a reconfigurable modular multilevel converter and an operation method and a storage medium thereof. The microgrid comprises a modular multilevel converter (MMC), the MMC comprises a plurality of phase legs, each phase leg comprises an upper arm and a lower arm, each arm is connected with a plurality of sub-modules in series, each sub-module comprises a semiconductor switching device, a capacitor energy storage unit and a controllable bypass switch structure; the MMC is connected with an AC bus and a DC bus respectively to realize bidirectional power conversion. The system comprises a plurality of feeder branches which are connected with the bus through power switching devices. Distributed edge controllers are arranged at the sub-modules or feeder interfaces to collect voltage and current parameters and output isolation or bypass signals in an abnormal condition; meanwhile, hierarchical reconfiguration controllers are arranged to perform structure reconfiguration and power path redistribution. The application realizes fault rapid isolation and reconfiguration cooperation through hierarchical control, maintains the voltage stability of the key load bus, and realizes the effect of improving the system reliability and power supply continuity.

This utility model relates to the field of urban rail vehicle component processing technology, and discloses a bending and forming device for aluminum alloy parts of urban rail vehicles. The device includes a frame, a material support platform fixedly mounted on the upper end of the frame, a downward hydraulic rod fixedly mounted on the upper end of the frame, and a downward pressure plate fixedly connected to the lower end of the hydraulic rod. A rotating bending hydraulic rod is mounted on the lower end of the frame, and a bending plate is rotatably connected to the upper end of the hydraulic rod. A switching mechanism is provided inside the downward pressure plate, which changes the concave shape of the material by switching the shape of the contact point with the material. This bending and forming device for aluminum alloy parts of urban rail vehicles, by setting a switching mechanism inside the downward pressure plate and using a switching motor to drive the central shaft to rotate, can easily switch the contact between the arc-shaped contact rod and the right-angle contact rod with the material, thereby changing the concave shape of the material. Compared with traditional devices, this eliminates the need to replace the entire contact component or even the mold.

The utility model relates to the technical field of forging furnace discloses a kind of multi-station quick die changing mechanism of forging furnace, comprising: base, for supporting overall structure;Multiple groups of push cylinder, fixed on base, and its output end is connected with push rod;Guide limiting rod, parallel setting in push rod both sides, for orientation;Push seat, with push rod, guide limiting rod fixed connection, and push seat is equipped with guide bar mouth and positioning jack;Die holder guide bar, slidably installed in guide bar mouth, and positioning slot is equipped in die holder guide bar;Positioning jack, cooperate with positioning jack and positioning slot by positioning jack, realize the quick positioning and locking of die holder guide bar. Multiple groups of push cylinder and guide limiting rod cooperation of being set, so that die holder guide bar can be quickly, stably switched between different stations, greatly shorten die changing time. Meanwhile, the cooperation design of positioning jack and positioning slot realizes the quick positioning and locking of die holder guide bar, improves the accuracy and efficiency of die changing.

The utility model provides a redundant power supply automatic switching device of a hot plug module, which relates to the technical field of power supply switching equipment, and comprises a socket assembly consisting of a socket cover and a plug assembly consisting of a plug seat and a plug block which are arranged on one side of the socket cover, the plug seat is connected with the socket cover through the plug block, and the plug block is connected with the socket cover through the plug block. Sliding holes are formed in the two ends of the plug block, a trigger rod penetrating through the plug seat is arranged in the plug seat, two connecting plates are arranged at the end, located in the plug seat, of the trigger rod, a rectangular frame is arranged between the two connecting plates, and a conductive column is arranged at the end, close to the plug block, of the rectangular frame; a plug seat of a plug assembly is connected with a socket cover through a plug block with a sliding hole, the sliding hole provides guidance for insertion, so that the plug block can stably move along a set path, during insertion, the plug block pushes a trigger rod, the trigger rod drives a connecting plate and a rectangular frame, a conductive column is in contact with a conductive structure in a socket, and power connection is achieved.

The utility model discloses a valve mechanism of micro -fluidic chip, including the upper valve disc of installing in the inside of micro -fluidic chip, the integral molding of a plurality of connecting columns of upper valve disc bottom end and the integral molding of a plurality of connecting column bottom end lower valve seat, the inside of lower valve seat is provided with a plurality of both ends all through to the arc drainage cavity of lower valve seat outside. Upper valve disc, lower valve seat in the utility model are driven by outside micro -motor and rotate in micro -fluidic chip, and the arc drainage cavity in lower valve seat is communicated with the corresponding flow passage in micro -fluidic chip, and the elastic retreat -stopping structure, the anti -slip groove maintain the rotation angle of upper valve disc, lower valve seat.

The application discloses a model-based mode switching combined control method for a shaft fan variable cycle engine. Firstly, a constant rotating speed control is carried out on a low-pressure output shaft of an external rotor, a low-pressure rotor rotating speed cascade controller is designed, and parameters of the cascade controller in the mode switching process are on-line set through a fuzzy theory. Secondly, through analysis of the relationship between the residual power of the low-pressure shaft and the rotating difference and the compressor surge margin in the mode switching process, a closed-loop controller for an internal connotation nozzle area is designed to compensate the output power of the low-pressure shaft and reduce the engine thrust; in order to inhibit the disturbance caused by the clutch engagement / disengagement and the pitch angle change in the mode switching process, a nozzle area pre-opening strategy and a pitch angle feedforward are introduced, and the surge margin of the low-pressure compressor in the mode switching process is improved through bleeding regulation. The application can provide a technical reference for the engineering development of a new generation of high-speed long-range helicopter power device in China.

The utility model discloses a rapid remodeling test structure for a servo motor stator. The rapid remodeling test structure comprises a bottom plate, two clamping assemblies, two guide assemblies, a guide plate and a probe assembly. The two guide assemblies are oppositely arranged on the bottom plate, the two guide assemblies are connected through a guide plate, and the two clamping assemblies are oppositely arranged on the guide plate; a motor is arranged on the bottom plate between the two guide assemblies, and a through hole is formed in the center of the guide plate and corresponds to the motor; the guide plate on the outer side of the through hole forms a support ring, and a plurality of probe assemblies are arranged on the support ring; the whole testing process is convenient and fast, the switching is stable, the requirements of any testing of stators with PCBs can be met, and the production efficiency is improved.

A brake handle with a dynamically variable rotation center in the braking process comprises a brake shell, a piston assembly, a push rod assembly, a brake handle, a multi-fulcrum linkage component and a rotation switching mechanism. The shell is provided with a piston cavity. The handle drives the piston to move through the push rod. The linkage component is provided with two rotating fulcrums, and the switching mechanism can switch two working states. When the front section of the handle is pinched, the handle rotates around the first fulcrum, idle stroke is eliminated, and operation is labor-saving. When the rear section is pinched, the second fulcrum is switched to rotate, and the lever ratio is increased to improve braking force. By means of automatic switching of double fulcrums, labor-saving control and large braking force output are both considered, and the problem that a traditional hydraulic brake handle is poor in performance is solved; the modular structure is easy to adapt to mass production, and switching nodes are accurate and controllable; a locking and failure protection structure is arranged, so that the operation is stable and safe; meanwhile, eccentric wear of parts is eliminated, the service life of sealing pieces is prolonged, and braking efficiency and use safety are improved.

The invention discloses a system and method for advertising through an electronic game by using AI, and relates to the technical field of electronic game advertising. The method comprises the following steps: acquiring an image of an interaction area to generate real-time video stream data; performing computer vision analysis on the video stream, extracting non-identity group features of the current interactive group, and forming feature data including dominant age interval labels; taking the label as a query key, and performing matching query according to a dynamic content mapping rule base to determine a target advertisement visual element identifier; positioning a replaceable texture storage area in the game resource package according to the identifier; and on the basis of visual data corresponding to the identifier, the texture content of the region is replaced by an asynchronous rendering updating technology, so that a dynamic advertisement matched with the characteristics of the current crowd is generated and presented in real time in a game picture. According to the method and the device, in an offline anonymous scene, the advertisement in the game is dynamically and accurately updated according to the group characteristic sensed in real time, and the game performance is not influenced.

This application discloses a foldable module and a foldable model. The foldable module includes a torso cylinder and a torso offset structure. The torso cylinder includes a torso wall with a first and a second fold line arranged opposite each other. The first and second fold lines are collinear with the central axis of the torso cylinder to form a reference plane. The torso wall can be folded along the first and second fold lines. The torso offset structure is located in the torso cylinder and has a third fold line. The third fold line, the first fold line, the second fold line, and the central axis of the torso cylinder are parallel to each other. The torso offset structure can be folded along the third fold line. When an external force is applied to the torso cylinder wall in a direction parallel to the reference plane, the first and second fold lines move closer together, and the torso cylinder wall bends along the first and second fold lines. When an external force is applied to the torso cylinder wall in a direction normal to the reference plane, the first and second fold lines move away from each other, and the torso cylinder wall unfolds along the first and second fold lines.

This utility model relates to the field of eyeglasses technology, and in particular to a hinge and eyeglasses. The hinge includes: a connecting block and a tailstock. The connecting block has a rotating hole and a limiting groove. The limiting groove extends along a preset arc trajectory, and its two ends have a first end and a second end, respectively. The tailstock includes a base, a rotating post, and a limiting post. The base has a guide surface, and the rotating post and the limiting post are spaced apart on the guide surface. The rotating post is rotatably disposed within the rotating hole, and the limiting post is movably disposed within the limiting groove. The hinge of this utility model achieves the rotation of the connecting block relative to the tailstock through the cooperation of the rotating post and the rotating hole. The limiting post moves within the limiting groove, and the first and second ends at both ends of the limiting groove restrict the rotation range of the connecting block, ensuring stable switching between two usage positions. This effectively prevents the hinge from losing its ability to limit the rotation range of the temples due to aging, thus improving the limiting reliability of the hinge.

The application relates to the elevator technical field, especially to a car connecting mechanism suitable for multi-direction elevator operation, which comprises a transition module, a positioning device and a supporting assembly. The transition module is matched with a guide sliding block through a rotating seat to realize angle adjustment, the positioning device improves switching precision by using a guide rod and a positioning pin, and the supporting assembly enhances overall stability. Further setting shock pads and lubricating coatings reduces vibration and friction. The application can realize smooth switching of the car between different direction tracks, solve the problems of insufficient adaptability and positioning deviation of non-coplanar or multi-angle track switching, and improve the safety and stability of elevator operation.

The invention discloses an automobile-oriented dynamic electronic fence generation method, which comprises the following steps of: acquiring vehicle information, denoising, mining a risk area and a resident place, and generating an initial risk area model with boundary coordinates and risk levels; then, administrative division and road vector data are fused, a three-dimensional hierarchical fence structure is constructed, and fence boundaries are optimized through a Douglas-Peucker algorithm and a cubic B-spline function; according to the real-time driving state of the vehicle, the fence radius is dynamically adjusted through a linear expansion algorithm, the alarm sensitivity is regulated and controlled in a graded mode, and dynamic fence configuration is generated; and finally, vehicle positioning is monitored based on a state machine model, fence switching and boundary jitter are processed by combining priority arbitration and a hysteresis comparison mechanism, redundant alarms are filtered through a time sliding window and behavior intention analysis, and an early warning report with a context is generated. According to the invention, dynamic and multi-level management and control of the electronic fence are realized, the accuracy and suitability of vehicle risk control monitoring are improved, and the false alarm rate is reduced.

The invention discloses a variable-rigidity soft prosthetic hand and a using method thereof, and the variable-rigidity soft prosthetic hand comprises a soft simulated hand mechanical body which comprises a rigid-flexible coupling bionic finger group module and a palm module; the rigid-flexible coupling bionic finger set module comprises at least two fingers, and each finger is sequentially provided with a movement cavity and a rigid cavity in the direction from the hand back to the palm. The motion chamber is provided with a corrugated structure and is used for driving fingers to bend; the fiber reinforced layer covers the outer wall surface of the stiffness chamber and is used for adjusting the stiffness of the finger and generating a first direction thrust; one end of the palm module is connected with the rigid-flexible coupling bionic finger group module, and the other end is connected with a limb of a patient; and the pneumatic driving control system is packaged in an inner cavity of the palm module and is connected with an air path in the rigid-flexible coupling bionic finger group module. According to the scheme, the problems that an existing artificial limb is heavy, low in load capacity, high in reset delay and inconvenient to maintain are solved.

The invention relates to the technical field of locks, in particular to a double-movable shifting shaft assembly of a motor lock body. The double-active shifting shaft assembly of the motor lock body comprises a shifting shaft which is used for rotating under the action of external force and is provided with at least one first driving structure; the unlocking structure is arranged on the shifting shaft in a sleeving mode so as to be in running fit with the shifting shaft, the unlocking structure is provided with at least one matching part, and the shifting shaft rotates under the action of external force, so that the first driving structure is connected with the matching parts, and the unlocking structure is driven to rotate to conduct mechanical unlocking action; and the second driving structure is connected with the motor, and the second driving structure is used for driving the unlocking structure to perform motor unlocking action. During mechanical unlocking, a clutch mechanism does not need to be disengaged by a motor speed reducer, the unlocking structure can be driven to rotate by directly shifting the shifting shaft, the unlocking action is completed, the lock body structure is greatly simplified, the manufacturing cost is reduced, meanwhile, the stability and reliability of the lock are improved, and the failure rate is reduced.

The invention discloses a terminal electricity utilization information acquisition system based on a safety component. The system comprises a cabinet body, a cabinet door and a safety lock assembly integrated with a password input device and provided with an electric control spring bolt. And a main control unit electrically connected with the password input device and the electric control spring bolt is arranged in the cabinet body. A processing module responsible for logic control, a password module for storing verification passwords and an authority module for storing operation authority are integrated in the main control unit. A connection management device is arranged in the cabinet body, the connection management device comprises an instruction input device and an electric connection switching assembly, and the instruction input device is electrically connected with the main control unit. And the main control unit unlocks the safety lock assembly after verifying the identity and authority of an operator according to the received unlocking password, and controls selective single-point electric connection between the electric connection switching assembly and the target acquisition terminal according to a received authority instruction. According to the invention, hierarchical authorization can be realized, and the security of a terminal system is remarkably improved.

A six-degree-of-freedom hybrid admittance control method that combines motion accuracy and stability includes: measuring the contact force between the robot and the environment, and obtaining the actual contact force after zero-point correction, gravity and inertia compensation. b F e By judging | b F e |≤10 ‑3 The validity of the condition is determined by whether there is an external force input; if there is no external force input, i.e., | b F e |≤10 ‑3 When an open-loop six-degree-of-freedom admittance control is used, the calculated value from the previous control cycle is taken as the current state for the current cycle; when there is an external force input during human-machine interaction, i.e., | b F e |>10 ‑3 In this case, closed-loop six-degree-of-freedom admittance control is employed, using measured joint positions and velocities to calculate the current state and solve for admittance control. Beneficial technical effects include: enabling six-degree-of-freedom admittance control of position and attitude; achieving real-time following without external force and contact stability with external force; and smooth and stable switching between the presence and absence of external force.

The invention discloses an office chair which can realize quick switching of rest modes and can adapt to arm supporting requirements in a lying state. Comprising a seat plate, two chair legs arranged on the lower portion of the seat plate and a backrest arranged on the upper portion of the seat plate, a driving mechanism is arranged at the bottom of the seat plate, the backrest is connected with the driving mechanism, and the driving mechanism is used for driving the backrest to rotate; handrails are arranged on the left side and the right side of the seat plate, the two handrails are connected with a driving mechanism, and the driving mechanism drives the backrest to rotate and is also used for synchronously driving the two handrails to move in the sitting depth direction of the seat plate; a pedal is arranged below the seat plate, and the driving mechanism is used for driving the pedal to move in the sitting depth direction of the seat plate while driving the backrest to rotate and the two armrests to move.

The vehicle prompting control device includes: a requirement determining section (103) that discriminates at least between a driver requirement that is a requirement that is highly likely to be resolved by a driver of a vehicle and an environment requirement that is a requirement that is less likely to be resolved by the driver as automatic driving start requirements that should be satisfied in order to start automatic driving; and a prompting control section (100) that, based on the automatic driving start requirements determined by the requirement determining section (103) being the driver requirement, performs a driver requirement prompt as a requirement prompt before the start of automatic driving, the requirement prompt being information prompting of a requirement needed for the start of automatic driving, the gist of the driver requirement prompt indicating that the start of automatic driving requires the driver requirement.

The invention belongs to the technical field of sampling devices, and discloses a sampling device for liquid medicine detection and a method thereof.The sampling device comprises a spherical medicine storage body, the lower portion of the spherical medicine storage body is communicated with a liquid suction pipe, a top pipe is arranged above the spherical medicine storage body, and a limiting plate is rotationally installed between the top pipe and the spherical medicine storage body in a sealed mode; the top pipe and the spherical medicine storage body can be isolated and sealed through the limiting plate, a liquid taking assembly is fixedly installed in the center of the top pipe and vertically extends to the bottom end of the interior of the liquid suction pipe, extraction and discharging of medicine liquid are completed through rotation, and a stirring assembly used for homogenization pretreatment of the medicine liquid is rotationally installed at the upper end of the top pipe. A swing assembly capable of expanding the stirring range is integrated on the stirring assembly, and a driving device used for providing power and achieving function switching is arranged on the top pipe; the liquid medicine stirring device is simple in overall structure, can efficiently and uniformly stir liquid medicine which is easy to layer and high in viscosity, eliminates stirring dead angles, and improves the using effect.

The application discloses an oil fume suction equipment and belongs to the technical field of kitchen appliances. The oil fume suction equipment is designed to solve the problem that the connecting rod of the existing oil fume suction equipment is prone to colliding with surrounding structures. The oil fume suction equipment comprises a connecting rod, a fume collecting hood and a flap assembly. One end of the connecting rod is connected to the flap assembly, and the other end of the connecting rod is movably connected to the inner wall surface of the fume collecting hood. An installation through hole for penetrating the connecting rod is formed in the fume collecting hood. When the flap assembly is in an open state, a closed state and switches between the open state and the closed state, the distance between the connecting rod and the edge of the installation through hole and the top surface of the fume collecting hood during movement is always greater than a set value. The oil fume suction equipment disclosed by the application always leaves a gap between the connecting rod and the edge of the installation through hole and the top surface of the fume collecting hood during movement, and the flap assembly is more smooth to open and close, the inner top surface of the fume collecting hood and the installation through hole are prevented from being extruded and deformed by the connecting rod, the use experience is better, and the miniaturization of the overall structure is facilitated.