94results about How to "Accurate guide" patented technology

The invention relates to a video restoration method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring an original video, extracting first edge feature information of the original video, acquiring a video to be restored, encoding a first reference video frame selected from the video to be restored to obtain a first encoding feature, adding noise to the first encoding feature to obtain a first reference video frame feature, acquiring a random noise signal, and outputting the random noise signal to the video to be restored. Fusing the first reference video frame feature and the random noise signal to obtain a noise-added noise feature, obtaining first mask information indicating a to-be-repaired area in the to-be-repaired video, defining a noise reduction control condition based on the first mask information and the first edge feature information, and performing noise reduction on the noise-added noise feature according to the noise reduction control condition to obtain a to-be-repaired video. And carrying out noise reduction on the video features to obtain the denoised video features, and decoding the denoised video features to obtain a restored video. By adopting the method, the video restoration effect can be improved.

The invention discloses a credible surface defect detection method and equipment based on a Bayesian condition diffusion model. The method comprises the following steps: constructing a training data set and a test data set; constructing and training an industrial product surface defect detection model based on uncertainty perception of a conditional diffusion model, inputting a test picture into the model for detection, and respectively obtaining a defect prediction image and an uncertainty prediction image of an input result; sorting the original input image, the defect prediction result and the uncertainty prediction result to obtain a conditional guidance image during second iteration; and inputting the obtained condition guide image and the to-be-detected image into the condition diffusion model to obtain a final defect prediction image and uncertainty measurement. According to the method, uncertainty measurement is carried out on a result generated by the model based on Laplace approximation, a detection result is optimized by utilizing the uncertainty of an output result, and then iteration is carried out to improve the credibility of a final detection result.

The utility model provides an automobile metal part stamping ejection mechanism, which relates to the technical field of ejection mechanisms, and comprises a lower die mechanism, the top of the lower die mechanism is fixedly connected with an upper die mechanism, the lower die mechanism comprises a bottom plate, the top of the bottom plate is fixedly provided with a first sliding rail, and the outer surface wall of the first sliding rail is sleeved with two sliding blocks in a sliding manner. According to the utility model, under the interaction of all the components of the lower die mechanism, stable ejection of formed parts can be realized, so that damage or deformation caused by improper ejection during ejection of the automobile parts is effectively avoided, and the impact force during ejection is reduced by the reset spring and the jacking spring, so that the product quality is improved. According to the ejection mechanism, deformation of the automobile parts due to instant impact is prevented, an operator can flexibly adjust the extension length of the ejection screw, the ejection mechanism can adapt to the parts of different shapes and sizes, it is guaranteed that the parts are evenly stressed in the ejection process, and the ejection quality is further improved.

The utility model relates to the technical field of medical equipment, and provides a hysteromyoma ultrasonic transducer rotation executing mechanism and a steam ablation device. The utility model provides a rotation actuating mechanism of a hysteromyoma ultrasonic transducer. The rotation actuating mechanism comprises an ultrasonic transducer and a stepless regulation mechanism, the stepless adjusting mechanism is connected with the ultrasonic transducer and used for stepless adjustment of the angle of the ultrasonic transducer. The technical problems that in the prior art, an ultrasonic transducer can only be located at certain fixed angles, and angle adjustment is limited are solved. During specific implementation, through integration of the stepless adjusting mechanism and the ultrasonic transducer, the ultrasonic guiding precision is remarkably improved, and particularly in medical equipment such as a hysteromyoma steam ablation device, the incident angle of ultrasonic waves can be accurately adjusted according to the position and form of an actual focus, so that the ablation process is more accurately guided, and the ablation efficiency is improved. The treatment efficiency and the safety are improved.

The invention relates to the field of propellers or rotors for airplanes, in particular to a bionic curved zigzag ducted rotor based on owl wings. A bionic curved zigzag ducted rotor wing based on an owl wing comprises a ducted body (1), a support (2) and a rotating shaft (3), the outer end of the support (2) is fixed on the inner side wall of the ducted body (1), the rotating shaft (3) is rotatably arranged at the center of the support (2), the bionic curved zigzag ducted rotor wing is characterized by further comprising at least two rotor wings (4), the rear ends of the rotor wings (4) are fixed on the rotating shaft (3), and the rotor wings (4) are evenly distributed around the rotating shaft (3). Namely, the connecting lines of the outer end points of all the rotor wings (4) form a line segment or a regular polygon with the rotating shaft (3) as the center, gaps are reserved between the front ends of the rotor wings (4) and the inner side wall of the duct body (1), and sawteeth (41) are arranged on the rear edges of the rotor wings (4). The pneumatic performance is excellent, and noise is reduced.

The utility model relates to the technical field of medical instruments, and discloses a full-automatic tissue dissociation instrument which comprises a main body, the heat preservation box is slidably connected to the top of the main body and used for containing a sample, the heat preservation box forms a box body structure, a limiting structure used for supporting and guiding a test tube is arranged in a cavity of the main body and comprises a guiding body, an extending body and a supporting plate, the guiding body is fixedly connected with the heat preservation box, and the extending body is fixedly connected with the guiding body; the wall face of the extending body forms an expandable petal-shaped structure, the supporting plate is elastically connected with the heat preservation box and located under the guiding body, the guiding body can guide the bottom of the test tube to fall on the top face of the supporting plate, the guiding body is arranged, the funnel-shaped guiding body is used for guiding the test tube to fall on the top face of the supporting plate, and the extending body extends towards the supporting plate. The extension body can more accurately guide the test tube to fall, and meanwhile, the extension body can provide certain supporting force for the test tube to inhibit the test tube from inclining, so that the test tube guiding and fixing effects are achieved.

The utility model belongs to the technical field of anesthesia, and discloses an ultrasound-guided nerve block anesthesia puncture device which comprises an ultrasonic probe, a fixing device, a cable, a puncture needle, an anesthetic injection channel, a sensor, an encoder, a high-performance processor, a human-computer interaction interface and a mechanical arm. Through real-time imaging of the ultrasonic probe and accurate control of the control system, the puncture needle can be accurately guided to a target nerve position, and anesthesia accuracy is improved. Due to the introduction of the mechanical arm, the puncture operation is simpler and more convenient, and the requirements on the operation experience and skills of doctors are reduced. Due to the fact that positioning is accurate, operation is easy and convenient, the pain and discomfort of the patient in the puncture process can be reduced. By means of accurate puncture operation, damage to surrounding normal tissue can be reduced, and the occurrence risk of complications is reduced.

The utility model discloses a lithium battery pole piece thickness control device which comprises a base, the upper surface of the base is fixedly connected with a fixing frame, the rear surface of the fixing frame is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a driving roller, and the inner surface of the fixing frame is slidably connected with an adjusting block. An extrusion roller is rotatably connected to the inner surface of the adjusting block, a connecting rod is fixedly connected to the upper surface of the adjusting block, a first adjusting frame is fixedly connected to the upper surface of the connecting rod, and through the arrangement of the two guide frames, a pole piece to be compacted can be conveniently guided and accurately guided to the center position of the extrusion roller, and it is guaranteed that the position of the pole piece is accurate; the compaction quality of the pole piece is improved, the surface and structural integrity of the pole piece is protected, the motor drives the two-way screw rod to rotate so as to drive the supporting block to move to adjust the distance between the guide frames, the device can be suitable for guiding the pole pieces of different specifications, and the applicability of the device is improved.

The invention relates to the technical field of bridge demolition construction, in particular to a pier column demolition device which comprises a first fixing assembly, a first positioning assembly, a second fixing assembly, a second positioning assembly, a connecting piece and a fretsaw, the first fixing assembly comprises a first cohesion side, the first positioning assembly is connected with the first fixing assembly, and the second positioning assembly is connected with the second fixing assembly. The first fixing assembly comprises a first cohesion side to adjust the posture of the first cohesion side, the second fixing assembly comprises a second cohesion side, and the second positioning assembly is connected with the second fixing assembly to adjust the posture of the second cohesion side. According to the dismounting device for the pier column, due to the fact that the design of the first fixing assembly and the second fixing assembly is adopted, and the posture of the cohesion side is adjusted through the positioning assembly, rapid and accurate fixing and positioning can be achieved outside the pier column, and the problems that in the prior art, fixing equipment is complex in structure and tedious to mount and dismount are effectively solved; and therefore, the technical effects of quickly positioning and reducing the construction time are achieved.

The present invention belongs to the field of testing technology, and can detect physical indicators such as breaking strength, breaking elongation, breaking strength, breaking time and strength-extension curve of various single yarns or fibers, and particularly relates to an automatic tensile meter length and weight detection device for ultra-high-strength fibers and a working method thereof. It includes a clamping assembly, a shearing assembly and a weighing assembly. The present invention provides a relatively smooth and clear path for the fiber during detection by using the clamping assembly, the shearing assembly and the weighing assembly in coordination, and automatically cuts the fiber while moving quickly along a predetermined path, and can quickly record the detected data, and feed back to the control system through the movement of each component, adjust each different step according to the product information, and record the detected information in time inside the control system, and display it on the display screen, so that the detection result is more accurate and complete.

The application belongs to the technical field of positioning and measurement, and particularly relates to a target positioning method and device combining CSI coarse positioning and Y-type CCD fine correction, which comprises the following steps: S1, CSI acquisition equipment is arranged in a target area, and CSI data between a sending end and a receiving end is acquired; S2, a Y-type CCD sensor is geometrically calibrated and a coordinate system is corrected, and coordinate reconstruction is completed; S3, the CSI data is preprocessed, noise is removed, and input is normalized; S4, time domain features of the CSI are extracted by using a time domain branch; S5, frequency domain features of the CSI are extracted by using a frequency domain branch; S6, a gating fusion module is used to fuse the time domain and frequency domain features, and the approximate position coordinates of a target are output; S7, the Y-type CCD sensor is controlled to optically acquire a target area, and point light source coordinate information is acquired; and S8, error correction is performed on the data acquired by the Y-type CCD, and the accurate position coordinates of the target are output.

The utility model relates to the technical field of hairdressing equipment, in particular to a rotary adjustable hair curling rod which comprises a shell, a hair curling assembly, a rotary shifting piece and an upper limiting block. The gear set of the rotary base is meshed with the driven gear, and the second gear teeth of the rotary shifting piece are meshed with the gear set, so that accurate rotation control over the curling iron is achieved, the curling angle and the curling direction can be adjusted more flexibly and stably, the curling effect and the user experience are improved, and the practicability is high. The heating piece is guided through the first moving guide rail and the second moving guide rail, the stability and accuracy of the heating piece in the hair curling process are guaranteed, the problems that a traditional hair curling rod is uneven in heating and unsmooth in hair curling are solved, the hair curling quality is effectively improved, and the upper limiting block and the top cover improve the structural stability of the hair curling rod and improve the hair curling efficiency. And in addition, the use safety is improved, the heating piece is prevented from accidentally falling off or shifting, and safer and more reliable use experience is provided for a user.

The utility model provides a material flow deviation rectifying mechanism of a belt conveyor. The material flow deviation rectifying mechanism comprises a liftable fixing frame, a horizontal telescopic arm, a universal joint, a detachable baffle connector, a material flow baffle and a material flow deviation detecting unit. According to the material flow deviation rectifying mechanism of the belt conveyor, the liftable fixing frame, the horizontal telescopic arm, the universal joint, the detachable baffle connector, the material flow baffle, the material flow deviation detecting unit and other structures are matched with one another, and when the material flow deviation rectifying mechanism is used, the material flow deviation detecting unit can capture the material flow deviation condition in real time; the horizontal displacement, the material blocking depth and the angle adjustment value required by the baffle are accurately calculated through a PID algorithm, and then the liftable fixing frame, the horizontal telescopic arm and the universal joint are controlled to cooperatively act, so that the material flow baffle can accurately guide the offset material flow to the central position of the belt conveyor, the problem of equipment deviation caused by material flow offset is effectively solved, and the service life of the belt conveyor is prolonged. And production accidents such as material scattering and equipment shutdown caused by deviation are avoided.

The invention discloses a flight control method and system based on multi-information cooperative control, and the method comprises the steps: enabling a flight computer to obtain a signal of each sensor and a predetermined target position, initializing an ideal track of an aircraft, and obtaining an ideal position of the aircraft; gNSS and IMU failure detection factors are calculated, and the actual position of the aircraft is determined according to the failure detection results of the GNSS signals and the IMU signals; when the distance between the actual position of the aircraft and the preset target position is greater than a distance threshold value, calculating a deviation time interval and adaptive optimization time to obtain corrected acceleration of the aircraft under the condition that the deviation between the actual position of the aircraft and the ideal position of the aircraft is greater than a position deviation threshold value, otherwise, continuously monitoring each signal parameter; and when the distance between the actual position of the aircraft and the predetermined target position is smaller than or equal to the distance threshold, screening the target through the infrared image. According to the method, signal failure detection, correction algorithm optimization and pixel temperature screening are combined, so that precise navigation of the aircraft is realized.

The present invention provides a rotator cuff repair positioner under shoulder arthroscopy, comprising a flat suture needle guide component and a suture needle positioning component, wherein the suture needle guide component is provided with a plurality of needle entry holes at different angles along its length direction, and the needle entry holes all pass through the center line of the suture needle guide component, and one end of the suture needle guide component is provided with a slot fixed to the suture needle positioning component, and the suture needle positioning component is divided into a vertical part and a horizontal part perpendicular to each other, wherein the vertical part is a handle, and is fixedly connected to the slot of the suture needle guide component, and the free end of the horizontal part is provided with a suture needle positioning hole, and the suture needle is positioned in the suture needle positioning hole after passing through the needle entry hole on the suture needle guide component. The positioner can help the surgical operator establish a reasonable and accurate operation approach, and is more helpful for the operator to accurately and quickly complete the repair and suturing of the rotator cuff tear, thereby obtaining the best surgical effect.

The invention relates to the field of elevator fault exhibition halls, in particular to an elevator safety education demonstration experience system and method for an elevator fault exhibition hall. Comprising an elevator simulation unit arranged in a wall of an exhibition room; the elevator simulation unit comprises a simulation elevator used for taking a first experience person and simulating elevator faults, and a VR display device arranged in the simulation elevator. The data processing unit is configured to form a first experiencer experience scene and a second experiencer experience scene; the VR display device is configured to display an experience scene of a first experiencer; and the display unit is configured to display the actual fault scene of the elevator, the experience scene of the second experiencer and the reaction and safe operation of the first experiencer. The elevator safety education demonstration experience system for the elevator fault exhibition hall can obviously improve the flow of people entering the exhibition hall, and has an excellent fault exhibition learning experience effect.

The utility model relates to the technical field of cold roll forming equipment, and discloses cold roll forming equipment for strip steel processing, which comprises a table body, a motor protection shell is fixedly mounted at the bottom of the table body, a guide mechanism is arranged at the top of the table body, and the guide mechanism comprises a first motor fixedly mounted on the inner wall of the bottom of the motor protection shell, and a second motor fixedly mounted on the inner wall of the bottom of the motor protection shell. A first gear is fixedly arranged on an output shaft of the first motor in a sleeving mode, a first rotating rod is rotationally installed in the motor protection shell, and the first rotating rod penetrates through the table body and is rotationally connected with the table body. By arranging the guiding mechanism, it can be ensured that strip steel is accurately guided to the designated position in the feeding process, which is crucial to the machining process needing high-precision positioning, accurate positioning can reduce errors and improve the product quality, accurate guiding can ensure that the strip steel cannot be mistakenly placed or damaged when entering a machining area, and the machining efficiency is improved. Therefore, material waste and cost loss are reduced.

The utility model provides an ultrasonic pipetting device which comprises an ultrasonic transducer, a pipetting mother board, a pipetting target board and an electrostatic adsorption device, the pipetting target board is located between the electrostatic adsorption device and the pipetting mother board, and the pipetting mother board and the pipetting target board are located between the electrostatic adsorption device and the ultrasonic transducer; the ultrasonic transducer is used for transferring liquid drops in the pipetting mother board into the pipetting target board; the electrostatic adsorption device is connected with the pipetting target plate and is used for generating an electric field force for enabling the liquid drops to move towards the target plate. According to the scheme, the liquid drops can be more accurately guided to the designated position on the target plate under the dual effects of ultrasonic waves and electric field force, efficient and non-contact transfer of micro liquid is achieved, the precision and reliability of the liquid transfer process are remarkably improved, and the liquid transfer device is suitable for scientific research and technical application needing high accuracy and repeatability.

The present invention relates to a conveyor roller assembly suitable for use in environments subject to significant temperature variations and an integrated end cap. The integrated end cap ensures efficient torque transfer to the ceramic coil thanks to its resilience resulting from the deformation of the end cap during its assembly onto the ceramic coil.

The invention discloses a half shaft heat treatment machining device which comprises a fixing frame, a cooling pond is fixedly arranged at one end of the fixing frame, a righting device for supporting a half shaft and keeping the half shaft in a vertical state is arranged on the cooling pond, an upper fixing piece for fixing the top end of the half shaft is arranged on the righting device, and a lower fixing piece for fixing the top end of the half shaft is arranged on the upper fixing piece. The centering device is provided with a lower fixing piece for fixing the bottom end of the half shaft, the upper fixing piece is provided with a positioning piece for positioning the half shaft, and the fixing frame is provided with a feeding device for guiding the half shaft into the positioning piece and pushing the half shaft to move downwards to enter the position between the upper fixing piece and the lower fixing piece. Through the design of the upper fixing piece and the lower fixing piece, the half shaft can rapidly fall into the cooling pond after being heated, a new half shaft can automatically enter the position between the upper fixing piece and the lower fixing piece, the continuous production process is achieved, and through the design, manual intervention is reduced, and production continuity and high efficiency are guaranteed.

The invention relates to the technical field of electrolytic lithium battery copper foil manufacturing, and discloses an electrolytic crude foil engine conductive structure and a method for reducing warping of copper foils, the electrolytic crude foil engine conductive structure comprises a power supply, a rectifier, a plurality of copper plates, a plurality of anode plates electrically connected with the plurality of copper plates one by one, an electrolyte and a cathode roller; the current flow direction of the conductive structure of the electrolytic crude foil engine is as follows: the power supply anode, the rectifier, the copper plate, the anode plate, the electrolyte, the cathode roller and the power supply cathode. In the electrolytic deposition process, the current of each anode plate is independently controlled, and the deposition rate and grain growth of the copper foil at different positions of the roller surface are differently regulated and controlled, so that the warping direction of the copper foil is accurately guided, or the warping degree of the copper foil is inhibited within an extremely low range.

The label tape cutting device comprises a transmission assembly and a cutting assembly, the transmission assembly comprises a first gear and a second gear which are meshed with each other, and the cutting assembly comprises a blade and a blade bearing structure. The blade bearing structure is fixed to the side face of the first gear on the first side in a swinging mode and can rotate around the central axis of the first gear along with the first gear, and a roller is arranged on the second side, opposite to the first side, of the blade bearing structure. The label tape cutting device further comprises a movement guiding mechanism, the movement guiding mechanism is provided with an annular guiding piece, a protruding part is formed on the peripheral contour of the annular guiding piece, and the protruding part is arranged on the annular guiding piece and extends outwards from the second side of the blade bearing structure in a manner of being far away from the blade bearing structure. The roller bears against the outer circumferential contour of the annular guide in a rolling manner.

The application discloses a multi-round interactive AIAgent intelligent agent based on multi-module cooperation and an implementation method thereof, and relates to the field of artificial intelligence.The intelligent agent comprises an information acquisition module, a dialogue state judgment module, an intention recognition module, a parameter extraction module, a rule engine module and a dialogue strategy module, and the modules work cooperatively.The information acquisition module maintains tool structured information and a historical dialogue library;the dialogue state judgment module distinguishes task continuation from a new task;the intention recognition module recognizes user intention;the parameter extraction module extracts structured parameters;the rule engine module checks the integrity and legality of the parameters;and the dialogue strategy module guides the user to supplement input.The implementation method completes multi-round interaction through multiple steps.The application adopts modular design, avoids model "illusion", realizes multi-round dialogue management, enhances system expansibility, and improves tool calling accuracy and user experience.

The invention relates to the technical field of mine restoration, and provides mine soil ecological restoration equipment which comprises a side slope, a reinforcing hard net installed on the side slope and a plurality of planting grids arranged on the reinforcing hard net in an array mode, positioning ladder holes are formed in cross joints of the planting grids, and anchoring insertion cylinders are installed in the positioning ladder holes; a surface repairing layer is arranged on the planting grids; an inner expansion repairing assembly is arranged in the anchoring inserting cylinder, and a leakage guiding assembly is arranged at the bottom of the anchoring inserting cylinder. The internal expansion repairing assembly comprises a honeycomb repairing column arranged in the anchoring inserting barrel and a moisture uniformizing disc located at the top end of the honeycomb repairing column and fixedly connected to the upper side of the interior of the anchoring inserting barrel, and a water permeable hole core column is installed at the top of the moisture uniformizing disc. When the device is used, through gridding arrangement of the reinforcing hard net and the anchoring insertion barrels, the surface repairing layer and the internal expansion repairing assembly are cooperatively integrated, and a three-dimensional repairing network with point-surface linkage and internal and external linkage is formed.

The present invention relates to the technical field of intelligent road signs, and in particular to an intelligent road sign indication system based on route planning, comprising: an intelligent road sign, including a direction sign, a display touch screen and an alarm light, for indicating the direction of travel to the user and displaying the route and images of markers, and indicating the direction of travel of an emergency shelter in an emergency; an interactive unit, for receiving a destination input by a user and marking the user at the same time, and determining whether the user on the route deviates from the route; a planning unit, for planning the route according to the destination; a cruise drone, for collecting road condition information, and performing occlusion detection and driving the intelligent road sign to travel to an unobstructed road sign point through the interactive unit. The present invention can quickly plan the optimal route by setting the above-mentioned device, and further improve the accuracy of the intelligent road sign while providing clear direction guidance.

The utility model discloses a winding drum type packaging device for textile fabric. The winding drum type packaging device comprises a first conveying belt, a second conveying belt, a third conveying belt, a first film guide roller, a second film guide roller, a packaging film conveying assembly, a first edge sealing assembly, a second edge sealing assembly and a thermal shrinkage assembly. A first conveying belt, a second conveying belt and a third conveying belt are sequentially arranged in the fabric roller conveying direction. A first film guide roller is arranged above the first conveying belt; a second film guide roller is arranged between the first conveyor belt and the second conveyor belt; a packaging film conveying assembly and a first edge sealing assembly are arranged on the two sides of the second conveying belt. A second edge sealing assembly is arranged at the end, close to the first conveying belt, of the second conveying belt. And a thermal shrinkage assembly is arranged on the third transmission belt. The structure is optimized, the edge sealing quality is stable, and the packaging efficiency is improved.

The utility model discloses a steady type internet access safety lock, relates to internet access safety technical field, including lock portion and key, the lock portion includes the fixed mount that is used for embedding in the computer internet access, the fixed mount is hollow frame-shaped setting, the fixed mount is connected with the elastic clamping tongue, the top side of the elastic clamping tongue is provided with the clamping protrusion, the top side of the elastic clamping tongue is connected with the key, the key is connected with the key, and the key is connected with the key. A key clamping hole corresponding to the elastic clamping tongue is formed in the front side of the fixing frame in a penetrating mode. The key comprises a control part and an unlocking part which is connected to the control part and can penetrate through the key clamping hole to be matched with the elastic clamping tongue. A guide column corresponding to the key clamping hole is integrally formed on the inner side surface of the fixing frame, the guide column is of a columnar structure, and the extending direction of the guide column is consistent with the axial direction of the key clamping hole so that a channel used for guiding the unlocking part can be formed in the extending direction of the guide column. The guide column provides accurate guidance for insertion of the key, so that damage to the lock is reduced, and the unlocking process is ensured to be carried out smoothly.

There is disclosed building panels (1, 1'), especially floor panels, provided with a locking system configured to lock adjacent edges of the building panels by angling and that comprises a tongue (10) and a strip (6) on the same edge. Horizontal locking surfaces (15) are located below a horizontal strip plane (HPS) intersecting an upper part (6a) of the strip (6) located essentially vertically under an outer part of the tongue (10).

The present invention relates to a wall-mounted metering dispenser, which comprises a container, a wall bracket and an extraction device. The container has a bottom area and a top area with an extraction port, the wall bracket has two fixed positions, the first fixed position is provided with a fixed position retaining element, the container can be loaded into the retaining element or the bottom of the container can be installed on the retaining element to retain the bottom area of ​​the container in a form-locked and / or force-locked manner in the first fixed position, and the second fixed position has a sleeve, which is fixed on the wall bracket and can be separated from the wall bracket or moved relative to the wall bracket. The extraction device is arranged on the sleeve or at least partially integrated in the sleeve. The extraction device is configured as a metering pump, which comprises a pump body and an operating element that can move relative to the container, the pump body having a pump chamber and a pump valve, the operating element being configured to mechanically cooperate with the pump valve and having an output port, and the output port is connected to the pump chamber. The operating element is guided in the sleeve.

The application discloses a vein puncture blood vessel intelligent positioning method and system based on multi-modal fusion, relates to the technical field of medical assistance and artificial intelligence, and comprises the following steps: collecting an original blood vessel image by means of an infrared imaging device and performing pretreatment; inputting a standardized blood vessel image into a deep learning model and a multi-modal large language model respectively for parallel analysis, outputting a first candidate puncture point set and a second candidate puncture point set; performing spatial alignment on the double-path candidate points, combining depth sensor data to construct a three-dimensional blood vessel network topology structure, screening an optimal puncture point through weighted fusion and clinical rule arbitration, and calculating a needle insertion angle and depth; and projecting guide information to the surface of the skin of a patient by means of a laser projection or AR display device and performing real-time calibration. The application significantly improves the accuracy, safety and individual adaptability of puncture point selection, and is suitable for clinical puncture operation and nursing teaching scenes.