66results about How to "Solve deviation" patented technology

The invention discloses a method for correcting dialogue intention information of old people based on a deep neural network, and particularly relates to the technical field of dialogue optimization, and the method comprises the steps: collecting and cleaning multi-topic multi-round dialogue data, marking multi-round dialogue corpora, and unifying the format; performing feature extraction on the labeled corpus by using the multi-intention recognition sub-model to generate a multi-intention representation vector capable of representing each intention; screening context content related to the target intention in combination with a hierarchical attention mechanism of user context dynamic weight adjustment; processing context content related to the target intention through gating operation based on multiple rounds of interaction history, and reserving semantic fragments with reference value; performing parallel analysis on the reference semantic fragments based on a multi-task learning structure of a deep neural network, performing classification processing on different intentions, and calculating scores; and executing multi-intention fusion correction operation according to classification and scoring results, and outputting intention information capable of distinguishing each intention.

The invention discloses a water level prediction model construction method based on image recognition, and relates to the technical field of water level monitoring. Comprising the following steps: establishing a visual reference system of a region, constructing a multispectral image data fusion module, constructing a water surface edge detection module, designing an anomaly detection mechanism based on self-supervised learning, constructing a water level height estimation model based on image semantic segmentation, and constructing a water level distribution prediction model combined with geographic information. A data feedback model based on meteorological dynamics is constructed, and a water level trend estimation module based on short-term time sequence prediction is introduced. According to the method, a water level prediction model is constructed by introducing technologies of multispectral image fusion, semantic segmentation and dynamic height estimation, and accurate extraction and prediction of water level information are realized under various environmental conditions. The robustness of the model under complex weather conditions is remarkably improved, and meanwhile, the problem of deviation caused by different visual angles and optical distortion is solved through dynamic adjustment factors and a geometric correction mechanism.

The invention provides a coordinate fusion calibration method and system based on an XR technology, and the method comprises the following steps: S1, manually measuring a transformation matrix # imgabs0 #, S2, obtaining a transformation matrix # imgabs1 #, obtaining a transformation matrix # imgabs2 #, obtaining a transformation matrix # imgabs3 #, S3, carrying out the operation to obtain a transformation matrix # imgabs4 #, S4, carrying out the operation to obtain a transformation matrix # imgabs5 #, S5, carrying out the operation to obtain a transformation matrix # imgabs4 #, and S5, carrying out the operation to obtain a transformation matrix # imgabs4 #. S6, carrying out operation to obtain a transformation matrix # imgabs6 #; S6, carrying out operation to obtain a transformation matrix # imgabs7 # again, and adjusting the origin of the virtual world coordinate system to coincide with the origin of the coordinates of the real world; and S7, fusion is completed. The method has the advantages that the problem of position deviation of the virtual world and the real world of head display equipment in the prior art can be effectively solved, the relative transformation matrix of the head display camera C and the locator t is calculated through the method, then the fused transformation matrix # imgabs8 # is calculated, the origin of coordinates of the virtual world and the origin of coordinates of the real world are adjusted to coincide, and therefore the head display equipment is more accurate. And the exercise using accuracy of the user is ensured.

The invention discloses an automatic control method for tipping paper printing based on image detection, and relates to the technical field of tipping paper printing, and the method specifically comprises the following steps: obtaining surface feature information of each sub-region in a wrinkling region in a tipping paper printing process in real time, and analyzing the surface feature information after obtaining, respectively generating a light intensity anomaly index and a tension instability index of each sub-region; and constructing a wrinkling influence evaluation model for the light intensity anomaly index and the tension instability index of each generated sub-region, respectively generating a comprehensive evaluation coefficient of each sub-region, performing analysis after generation, and evaluating the influence degree of each sub-region in the wrinkling region on the generated printing alignment parameter. And dividing each sub-region in the wrinkling region into a non-influence region, a low-influence region and a high-influence region according to an evaluation result. According to the invention, the problem of insufficient characteristic identification and evaluation of the wrinkling area is solved, and intelligent improvement of printing alignment precision and finished product quality is realized.

The invention discloses intelligent low-clearance cast-in-place pile construction equipment, system and method. The construction site scanning and model building, paying-off and point position projection and correction, automatic construction path planning, drilling positioning, preparation work before drilling (burying of a soil layer structure integrity evaluation sensor), drilling construction and accurate control of perpendicularity and drilling depth, drilling lifting and in-hole environment detection are sequentially completed. And therefore, the intelligent construction operation of the cast-in-place pile is completed, the equipment has the construction characteristics of miniaturization and large drilling depth, and the intelligent construction operation under the low clearance working condition is perfectly achieved.

The invention discloses a heat preservation and heat insulation curtain and a production process, and provides a heat preservation and heat insulation curtain structure installed front and back, a second fixing plate is installed on a first fixing plate in a front-back rotating and hooking mode, and compared with a traditional overall installation mode or a transverse horizontal insertion mode, the heat preservation and heat insulation curtain can facilitate independent disassembly and assembly operation of a single curtain body. Limiting bosses are additionally arranged on the second fixing plate and the pressing strip, so that the pressing stability can be effectively improved. The groove planing structure is additionally arranged on the curtain body and matched with the matching body arranged on the edge covering strip, so that the structural stability of the covering edge and the curtain body during hot melting operation can be improved, and the problem that the edge covering strip deviates is solved.

The invention relates to the technical field of drill bit welding, and discloses a drill bit production welding device which comprises a base, a fixing assembly is installed on the upper end face of the base and comprises a plurality of external expansion plates, and a cylindrical base body is fixed to the outer sides of the external expansion plates; according to the device, by arranging the clamping mechanism and the adjusting assembly, coaxial positioning and equal-distance control over all the drill bit parts and the base body are achieved, and the multiple drill bit parts can be synchronously adjusted and positioned under the action of the clamping assembly through cooperative cooperation of an adjusting rotating shaft, a first driving gear and a plurality of threaded rods; when the first driving gear rotates, the threaded rods drive the clamping assemblies to be evenly close to the base body, and under the effect of the coaxial supporting barrel, it is guaranteed that the drill bit parts and the base body are always kept in a coaxial state; the drill bit parts are clamped through the evenly-arranged clamping pieces, the distance between each drill bit part and the axis of the base body can be accurately controlled, the deviation problem caused by step-by-step operation is solved, and therefore the coaxial precision in the welding process is greatly improved.

The invention discloses a tunnel fire detection and simulation method and system driven by video data, belongs to the technical field of computer vision and machine learning, and solves the problem that the current tunnel fire target detection algorithm is easy to cause insufficient distinguishing capability of vehicles and flames in a complex multi-target scene environment. The method comprises the following steps: preprocessing an obtained original data set to obtain a target data set to train an improved YOLOv8 neural network model, and carrying out target detection on a to-be-detected tunnel fire scene disaster image to obtain a central coordinate of each preliminary disaster object target for correction; after correction, a monocular vision positioning method is adopted to carry out position calibration and distinguishing on the corrected disaster situation object target, and then real-time scene twinborn modeling is carried out, so that a tunnel fire scene twinborn model is obtained and dynamically updated; and performing flame spread analysis on the tunnel fire scene based on the tunnel fire scene twinborn model, and realizing dynamic updating in un ity. The method is used for tunnel fire detection and simulation driven by video data.

The invention relates to a method for multi-modal recommendation, electronic equipment and a readable medium, and the method comprises the steps: designing a graph purification strategy on an interaction graph, so as to eliminate a noise edge caused by non-uniform attention of a user; then, the three GCNs are applied in parallel to process multi-modal features and ID embedding respectively, and purified high-order representation of users and articles is obtained. For a second restriction, messaging is performed on the frozen user-user and item-item affinity maps to aggregate features between similar nodes. Summing learning results of the interaction graph and the affinity graph; afterwards, mutual information between ID embedding and modal features is maximized by introducing a contrast learning task and utilizing an inherent self-supervising signal of a multi-modal attribute, so that self-supervising learning without data enhancement is realized;

The utility model discloses a UPVC pipe bonding auxiliary device relates to pipeline installation field, including slide rail, pipeline support block and two bonding direction adjusting block, be equipped with three slider on the slide rail, slider can freely slide along the slide rail, pipeline support block corresponds with the middle slider, its top is equipped with the semicircle concave cavity that is used for supporting UPVC pipeline, and the two bonding direction adjusting block is equipped with the semicircle concave cavity that is used for supporting the UPVC pipeline. Through the design of the pipe fitting concave cavity formed by combining the cross-shaped concave cavity and the round concave cavity at the bottom, the bonding direction adjusting block can position and support the UPVC pipe fittings, the angle between the two UPVC pipe fittings in the bonding process is ensured to meet the requirements (such as 0 degree, 90 degrees and 180 degrees), the problem of deviation caused by manual naked eye judgment is thoroughly solved, the production efficiency is improved, and the production cost is reduced. And it is ensured that the bonded pipeline is installed in place at a time, reworking is avoided, waste of materials is reduced, and working efficiency is improved.

The present application belongs to the technical field of industrial internet security, and relates to an industrial internet vulnerability library establishment method, which solves the problems of low construction quality, weak traceability, insufficient continuous evolution ability and difficulty in supporting deep security application of the existing vulnerability library. The present application obtains industrial internet multi-source vulnerability data and external feedback data, obtains extraction results and initial confidence based on multi-source vulnerability data by adopting rule extraction and remote supervision deep learning joint extraction, divides the certainty knowledge base and the to-be-reviewed queue according to the double threshold after the confidence is optimized by the graph convolution network, analyzes the external feedback data of the samples in the to-be-reviewed queue as the instant reward signal, optimizes the sampling strategy and updates the model through deep reinforcement learning, extracts triples from the certainty knowledge base to build a knowledge graph and generate a version hash chain regularly, and obtains a structured vulnerability knowledge base containing a hash chain and confidence evaluation. The present application realizes high-precision construction and dynamic optimization of the vulnerability library.

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 patent relates to the technical field of tobacco, and particularly relates to a conveying system for a paper-process sheet drying oven and the paper-process sheet drying oven. The conveying system comprises a conveying device, a first deviation rectifying device and a second deviation rectifying device. The first deviation rectifying device and the second deviation rectifying device are both used to provide displacement in a deviation rectifying direction to the conveying belt, the deviation rectifying direction is perpendicular to the length direction of the conveying belt, the distance between the first deviation rectifying device and the end driving roller is not greater than 10%, 20% or 25% of the length direction size of the transmission assembly, and the second deviation rectifying device is arranged substantially symmetrically to the middle line of the transmission assembly in the length direction of the first deviation rectifying device. The patent can better solve the deviation problem of the conveying belt, save labor cost, improve production efficiency and reduce the labor intensity of the operator. The deviation rectifying frequency of the first deviation rectifying device and the second deviation rectifying device is lower during the working process, and the first deviation rectifying device and the second deviation rectifying device are more suitable for deviation rectifying of long-distance belt conveying systems and have a longer service life.

The invention provides a training sample making method, a training sample making device and a computer storage medium. The training sample manufacturing method comprises the steps that according to a first video frame and a second video frame which are adjacent, a motion detection frame and an average video frame are generated, and the motion detection frame comprises an unknown area, a motion area and a static area; generating an initial unknown region pixel value according to the first unknown region pixel value of the first video frame and the second unknown region pixel value of the second video frame; establishing a three-dimensional array of pixel values of the initial unknown region according to the average pixel value of the average video frame and the motion pixel value of the motion detection frame; searching a pixel value of a target unknown area according to the three-dimensional array; updating the motion detection frame based on the target unknown region pixel value; and forming a training sample by using the updated motion detection frame, the first video frame and the second video frame. Through the training sample manufacturing method, high-quality training samples can be provided for the motion detection network.

The invention relates to the technical field of high-voltage cable fault detection, and provides a low-sampling high-voltage cable fault positioning method based on head edge correction and waveform quality weighting. The method comprises the following steps: deploying low-power-consumption wave recording terminals at two ends or key nodes of a high-voltage cable joint so as to collect a timestamp sequence when a high-voltage cable fault occurs; calculating a first edge slope, a signal-to-noise ratio and oscillation symmetry triggered by the first edge; calculating a waveform quality correction coefficient of the first edge based on the slope of the first edge, the signal-to-noise ratio of the signal and the oscillation symmetry; based on the timestamp sequence, screening subsequent timestamps strongly associated with the first edge by taking the first edge timestamp as a reference to obtain an effective timestamp sequence; and taking the first edge as a positioning reference, performing fitting correction on the deviation of the first edge by using the effective timestamp sequence and combining the waveform quality correction coefficient of the first edge to obtain a corrected first edge time difference, and further obtaining a fault position through a double-end positioning method.

The utility model discloses a gluing auxiliary device which is used for supporting a double-faced adhesive tape block, release paper is connected to one side, close to the gluing auxiliary device, of the double-faced adhesive tape block, the gluing auxiliary device comprises a working table, and a plurality of positioning structures capable of positioning the double-faced adhesive tape block are arranged on the upper surface of the working table. The workbench is further provided with a suction nozzle structure capable of fixing the positioned double-faced adhesive tape block, the suction nozzle structure is connected with an air extractor capable of enabling the suction nozzle structure to generate negative pressure to adsorb the double-faced adhesive tape block, and the workbench is further provided with a lifting device capable of pushing a product pasted with the double-faced adhesive tape block away from the positioning structure. Compared with single-station manual operation, the double-faced adhesive tape block positioning device has the advantages that the productivity is improved, and the deviation problem caused by manual operation is effectively solved. A negative pressure adsorption mechanism is formed through the synergistic effect of the suction nozzle structure and the air extractor, uniform vertical adsorption force is generated on the double-sided adhesive block in the adhesive coating process, and the risk that the adhesive is pressed and deformed is avoided.

The invention discloses a chronic disease and multi-disease coexistence detection method driven by tongue coating microbiota, and relates to the field of biological detection and risk assessment, and the method comprises the following steps: collecting a tongue coating sample of a subject, and extracting microbial DNA (Deoxyribose Nucleic Acid); carrying out sequencing on the DNA by adopting a high-throughput metagenome sequencing technology; constructing a community composition spectrum of a microbial species level based on a sequencing result; performing chronic disease state grouping on the samples; a statistical method and a machine learning model are adopted to identify characteristic strains significantly related to chronic diseases and coexistence of multiple diseases. According to the scheme, the dynamic change rule of the microbial community along with disease progression can be revealed, and the risk prediction accuracy and the crowd applicability are remarkably improved.

The utility model relates to the technical field of LED display screens, in particular to a connecting mechanism for mounting an LED display screen, which comprises a mounting base and a fixing bolt, the lower part of the inner wall of the mounting base is fixedly connected with a stabilizing plate, one side of the lower end of the stabilizing plate is fixedly connected with an adjusting device, and the lower part of the inner wall of the mounting base is provided with a limiting chute; and the adjusting device comprises a driving motor, the inner sides of the connecting frames are jointly and fixedly connected with a connecting shaft block, the upper end of the connecting shaft block is fixedly connected with a mounting assembly, and the driving motor is fixedly mounted on one side of the lower end of a stabilizing plate. According to the connecting mechanism for installation of the LED display screen, high-precision multi-angle adjustment is achieved through the driving motor, the intermittent column, the intermittent arc groove and other structures, diversified scene requirements are met, meanwhile, rapid installation and disassembly are achieved through the design of the upper installation frame, the lower installation frame, the resistance pad and the like, the maintenance and replacement process is simplified, and manpower and time cost is reduced.

The invention relates to the technical field of big data processing and intelligent recommendation, in particular to an intelligent recommendation system driven by big data. The method comprises the following steps: collecting user behavior data and article feature data, and generating a user feature set and an article feature set; a user feature weight is introduced, a relative deviation degree is calculated, a recommendation value is calculated, and a recommendation list is generated; displaying the recommendation list to the user to obtain a feedback value; and dynamically adjusting the user feature weight based on the feedback value, the recommendation value and the relative deviation degree, calculating the relative deviation degree and the recommendation value based on the obtained final user feature weight, and finally generating a personalized recommendation list. The problem that a traditional recommendation system mainly depends on static similarity calculation of users and articles, so that personalized recommendation accuracy is insufficient is solved; the response capability to the user interest change is weak, so that the recommendation system easily misjudges the user demand; and a global performance optimization and regulation and control mechanism is lacked, so that a recommendation system is easy to fall into local optimum.

The embodiment of the invention provides a BMS hardware-in-the-loop testing system and method, electronic equipment and a storage medium, and relates to the technical field of battery management system testing. The system comprises a simulation machine, an environment simulation cabin, a test bench and a BMS hardware test board, and the simulation machine is used for generating an environment parameter signal and a battery working condition signal and dynamically adjusting test parameters according to a response instruction returned by the BMS hardware test board; the environment simulation cabin is used for adjusting environment parameters of the environment where the BMS hardware test board is located based on the environment parameter signals; and the test bench is used for simulating a battery signal based on the battery working condition signal. According to the method, the coupling effect of the synchronous simulation electric signal and the physical environment is achieved, the test scene can be dynamically optimized according to the real-time response of the BMS, multiple test scenes are covered, the test result is more suitable for the real and complex working conditions of the BMS, and the problem that the BMS performance evaluation by an existing method has deviation compared with the real and complex working conditions is solved.

The application discloses a synchronous belt fixed-length cutting machine capable of preventing deviation, and relates to the technical field of cutting machines.The moving mechanism, the lifting frame, the driving mechanism, the multifunctional mechanism and the deviation detection mechanism are integrated, and the driving mechanism can also control the blowing mechanism, so that one drive controls multiple, the equipment cost and the control complexity are reduced;the multifunctional mechanism integrates the dust removal, the leveling and the static electricity removal functions, the blowing mechanism blows dust on the lower surface of the synchronous belt synchronously, and cooperates with the deviation detection mechanism to monitor the position of the synchronous belt in real time before cutting;the three work together, the synchronous belt deviation problem caused by dust, static electricity and wrinkles is effectively avoided, and the cutting precision is significantly improved;the adjusting mechanism can adjust the heights of the three groups of second guide rollers respectively, so that the up-and-down movement is not needed during feeding and traction, and the risk that the vacuum suction plate is separated from the discharge end of the synchronous belt is avoided;the application realizes full-automatic cutting without manual intervention.

This invention discloses a device and method for disassembling and assembling a DC generator for an engine, relating to the field of aero-engine maintenance technology, with the aim of improving the efficiency and quality of DC generator disassembly and assembly. The technical solution adopted in this invention is as follows: the DC generator disassembly and assembly device includes a pressure plate, an adapter rod, bolts, and sleeves. The pressure plate has a circular central hole, in which the adapter rod is placed. The adapter rod consists of an upper section and a lower section. The upper section is located within the central hole and has a clearance fit with it. The outer diameter of the lower section is larger than the diameter of the central hole. A wrench connection structure is provided at the top of the upper section, and at least three claws are provided at the bottom of the lower section along the circumferential direction. The pressure plate has at least three fixing holes arranged on a circle centered on the central hole. Each of the at least three fixing holes is fitted with a bolt and connected to a sleeve. This invention is used for the disassembly and installation of the fixing nut of a DC generator, and also for the disassembly and installation of a graphite sealing device, featuring convenient, quick, safe, and reliable disassembly and assembly.

This invention provides a progressive stamping die for motor cores, belonging to the field of motor core processing technology. It addresses the problem that existing core material feeding mechanisms typically apply progressive power only from one side of the material, making it difficult to achieve balanced force distribution across the entire material strip. Furthermore, due to the thinness and high flexibility of the core material, deviations in the movement path are possible. The die includes a lower die assembly, adjusting cavities, a first drive shaft, an anti-deviation component, and a stamping adaptation component. Two adjusting cavities are respectively located inside the lower die assembly. The first drive shaft is coaxially fixedly connected to the rear of the drive handwheel. The anti-deviation component is located inside the lower die assembly. The stamping adaptation component is located inside the two adjusting cavities. This invention solves the problem of core material deviation and adapts to core materials of different widths through two sets of anti-deviation wheels with adjustable spacing. The rotating column and adapting spring ensure smooth conveying and continuous stamping by reducing friction and avoiding interference, thus improving production quality and efficiency.

The application discloses an equivalent estimation method for selection of dynamic compaction design parameters, and belongs to the field of foundation treatment, comprising the following steps: constructing a calculation model of energy density; selecting a reference soil body, calibrating the energy density threshold of different reinforcement levels of the reference soil body, determining the soil quality correction coefficient and target energy density of a target soil body according to the energy requirement difference of the target soil body and the reference soil body reaching the same reinforcement level; determining the reinforcement treatment thickness and ramming point distribution form of the target soil body, and drafting the initial value of the dynamic compaction design parameters, wherein the dynamic compaction design parameters comprise single-ramming ramming energy and ramming point spacing; calculating the energy density of the current soil body based on the calculation model of energy density, obtaining the effective energy density of the soil body, comparing the effective energy density of the soil body with the target energy density, and iteratively adjusting the single-ramming ramming energy and the ramming point spacing until the effective energy density of the soil body matches the target energy density, and outputting the final dynamic compaction design parameters.

The invention discloses a hollow shaft gear shaping machining device, and relates to the technical field of machining equipment, the hollow shaft gear shaping machining device comprises a workbench, a clamping claw, a base and a centering jacking mechanism, the centering jacking mechanism comprises a shell, a driving rod, a first base part and a second base part, the left-right position of a hollow shaft is corrected from the inner side of the hollow shaft through the first base part, and the left-right position of the hollow shaft is corrected through the second base part; the second base part corrects the front and back positions of the hollow shaft from the inner side of the hollow shaft, performs double centering of the hollow shaft from different heights, centres and clamps the hollow shaft from the inside, and is matched with a clamping claw to clamp the inner end and the outer end from the outer end of the hollow shaft, so that the condition of deviation in centering and clamping of the hollow shaft is avoided, and the clamping efficiency is improved. The problem of centering clamping deviation in the hollow shaft gear shaping machining process is solved, and centering clamping deviation in the hollow shaft gear shaping machining process can be avoided.

The utility model discloses a mould with a jacking structure, which relates to the technical field of moulds and comprises a rear mould base bottom plate, an ejector pin is fixedly connected to the top of the rear mould base bottom plate, a front mould base bottom plate is arranged at one end, far away from the rear mould base bottom plate, of the ejector pin, a sleeve is arranged at the bottom of the front mould base bottom plate, the ejector pin is sleeved in the sleeve, and the ejector pin is fixedly connected with the rear mould base bottom plate. A jacking assembly is arranged in the rear mold frame bottom plate and comprises a base, a jacking piece is arranged on the base, a support plate is arranged on the side, close to the jacking piece, of the top of the base, a supporting plate is arranged on the support plate, a round rod is slidably connected to the supporting plate, and a rotating disc is arranged at the bottom of the round rod. By arranging the jacking assembly, opening and closing of the mold can be automatically or semi-automatically helped, it can be guaranteed that the mold is kept at the stable and accurate position in the opening and closing process, and the machining precision and consistency of products can be improved.

The application discloses a kind of rearing devices and methods of dynamic deviation correction of manure belt, and the rearing device of dynamic deviation correction of manure belt includes cage structure, cage structure includes two columns of stand and is set on two columns of stand 3 layers of rectangular crossbeam, 3 layers of rectangular crossbeam are provided with 3 layers of duck cage, and the lower side of each layer duck cage is provided with manure belt, and the front end of manure belt is connected with roller, and the side of manure belt is provided with side baffle;Two sides of each layer duck cage are provided with two same structures of dynamic deviation correction device of manure belt;Each dynamic deviation correction device of manure belt includes slide rail, 3 run deviation detection devices, execution device and control system;Slide rail is arranged between first stand and second stand;Slide rail is provided with slide pull plate that can move forwards and backwards;The rearing device of dynamic deviation correction of manure belt is simple in overall design, and the structure is reasonable, and the problem of run deviation of manure belt in poultry breeding process can be effectively solved, so as to reduce production cost and reduce labor intensity.

A top sealing structure is used for packaging a battery packaging area, the battery packaging area comprises an aluminum plastic film and a tab extending out of an opening of the aluminum plastic film, and the top sealing structure comprises an upper sealing head, a lower sealing head, a first elastic block and a second elastic block; a first open groove is formed in the lower sealing head, a first elastic block and a second elastic block are arranged at the first end and the second end of the first open groove respectively, the battery packaging area is pressed in the first open groove through the upper sealing head, and one end of the battery packaging area is in contact extrusion with the first elastic block. The other end of the battery packaging area is in contact extrusion with the second elastic block, and the first elastic block and the second elastic block can generate elastic deformation so as to adjust the size of a gap between one end of the battery packaging area and the first end of the first slot and the size of a gap between the other end of the battery packaging area and the second end of the first slot. The top sealing structure can solve the problems of liquid leakage or corrosion and the like of the top sealing position caused by the fact that the center of the battery packaging area deviates from the center of the sealing head slotting.

According to the embodiment of the utility model, the underground laser orientation instrument for the coal mine comprises a mounting plate, a plurality of connecting pieces and a laser orientation instrument, the mounting plate extends along the horizontal direction, and the upper ends of the plurality of connecting pieces are suitable for being connected with a steel mesh of a roadway, so that the connecting pieces can be mounted on the steel mesh conveniently; the mounting plate is arranged on the multiple connecting pieces in a penetrating mode, the mounting plate can move on the mounting plate in the vertical direction so that the position and angle of the mounting plate can be adjusted, the multiple connecting pieces are arranged in the circumferential direction of the mounting plate at intervals, and the laser orientation instrument is arranged below the mounting plate and connected with the mounting plate. The laser orientation instrument for the underground coal mine has the advantages of being convenient to disassemble and assemble, low in cost and the like.

The utility model discloses a centering clamp applied to a wafer, and relates to the technical field of wafer centering equipment, the centering clamp comprises a fixed support with a bearing tray, two clamping pieces arranged on the fixed support, a driving assembly and a linkage assembly, and the bearing tray is used for bearing the wafer; the two clamping pieces are slidably connected to the two opposite sides of the fixing support respectively, at least one clamping piece is connected with the driving assembly, and the driving assembly is used for driving one clamping piece to move towards the bearing tray; wherein the linkage assembly is used for connecting the two opposite ends of the two clamping pieces, when one clamping piece moves towards the bearing tray, the linkage assembly is used for synchronously driving the other clamping piece to relatively move towards the bearing tray, and through the arrangement, the center of the wafer can be pushed to coincide with the center of the bearing tray.