17results about How to "Eliminate error accumulation" patented technology

The invention provides a thread trimming method of a sewing machine, and belongs to the technical field of sewing machines. The problem that an existing thread trimming method is insufficient in bird groove preventing effect is solved. The thread trimming method comprises the following steps that A, a machine needle is driven to drive an upper thread end to move downwards to penetrate through a lower needle hole in a movable cutter and then move upwards to the position above a needle plate, and the upper thread end is kept in the lower needle hole; b, a thread trimming power mechanism starts to work, a movable cutter is driven to drive an upper thread end to move in the direction away from a needle falling hole, and then the thread trimming power mechanism stops working; c, the needle bar power mechanism drives the machine needle to sew a plurality of stitches; d, the thread trimming power mechanism works again, the movable cutter and the auxiliary cutter are driven to move in the direction close to the needle falling hole together, the movable cutter stops moving until the movable cutter is located under the needle falling hole in the needle plate, and the auxiliary cutter continues to move to be meshed with the movable cutter edge to cut off the upper thread end. The thread trimming device has the advantages of being high in thread trimming efficiency and good in bird nest prevention effect.

The invention relates to the technical field of equipment control, in particular to a self-adaptive switching method and system of a current transformer. The method comprises the following steps: collecting primary side parameters and secondary side parameters of a current transformer to obtain primary side collection parameters of the current transformer and secondary side collection parameters of the current transformer; performing current transformer state segmentation initialization according to the current transformer primary side acquisition parameters and the current transformer secondary side acquisition parameters so as to generate a current transformer operation state classification result; switching result judgment is conducted on the current transformers according to the current transformer operation state classification result, and when the current transformer operation state classification result is a current transformer critical state section, parallel buffering is conducted on the current transformers, and critical current transformer switching data are generated. According to the invention, through accurate state classification, a dynamic switching mechanism, time sequence optimization and visual display, the switching sensitivity and stability of the current transformer are improved.

The invention relates to the field of machining and manufacturing, in particular to a method and system for detecting the size of a metal forge piece, and the method comprises the following steps: calibrating a three-dimensional modeling camera, and completing camera calibration, hand-eye calibration and turntable calibration in combination with an intelligent error feedback system and a multi-calibration-plate auxiliary system; standard part scanning and three-dimensional modeling, including auxiliary positioning of punctuation, scanning modeling, point cloud processing, point selection and feature extraction, and data storage in a database; scanning a test piece and performing three-dimensional modeling, wherein the process comprises three-dimensional scanning and data storage of the test piece in a normal-temperature or high-temperature environment, point cloud processing, multi-level point cloud registration, feature extraction and matching, distance calculation and judgment on whether the test piece is qualified or not; and outputting and storing the measurement data, and generating a test report to record the measurement data for inspection. According to the invention, high-precision size detection of the metal forge piece with a complex structure in a harsh environment is realized, the accuracy of a result is ensured, the batch detection efficiency and reliability are improved, and the method is suitable for industrial application scenes with high requirements.

The invention discloses a cross beam driving device of a high-precision plasma cutting machine, and relates to the technical field of plasma cutting equipment, the cross beam driving device comprises a machine tool and a cross beam main body slidably arranged on the machine tool, guide rails are fixedly arranged on the two sides of the machine tool, and magnetic suspension modules are arranged between the cross beam main body and the two guide rails; a guide structure used for guiding the beam body to move in the length direction of the guide rail is arranged on the guide rail, and a driving device used for driving the beam body to slide is arranged on the machine tool. The plasma cutting machine has the advantages that high-precision cutting operation of the plasma cutting machine can be considered, meanwhile, the plasma cutting machine can efficiently move to the position needing to be cut, and then the working efficiency of the plasma cutting machine is improved.

The invention provides a thread trimming structure of a double-cam type sewing machine, and belongs to the technical field of sewing machines. The problem that an existing thread trimming structure is insufficient in anti-bird groove effect is solved. The thread trimming structure further comprises a movable cutter cam and an auxiliary cutter cam, the movable cutter cam and the auxiliary cutter cam are arranged in parallel in a spaced mode and fixedly connected to the driving shaft, and the working circumferential face of the movable cutter cam comprises a first concave arc section AB, a first convex arc section BC, a second concave arc section CD and a second convex arc section DA which are sequentially connected end to end. The first convex arc section BC is provided with a section of trimming arc surface concentric with the driving shaft; when the thread trimming arc surface on the movable cutter cam slides over the abutting part I, the movable cutter stops at the position where the cutting edge of the movable cutter is located under the needle falling hole; and in the process, a needle raising and thread trimming peach tip a on the auxiliary knife cam can slide over the abutting part II, so that the auxiliary knife moves towards the edge of the movable knife and is engaged with the edge of the movable knife. The device has the advantages of being stable in work and good in bird nest prevention effect.

The invention provides a machining device and method for a main and auxiliary connecting rod of a diesel engine. The machining device comprises a fine boring base, a connecting rod large end positioning assembly and a connecting rod small end positioning assembly. The connecting rod big end positioning assembly comprises a positioning block and two positioning plates which are oppositely arranged, and the positioning block, the two positioning plates and the fine boring base jointly form a first positioning gap used for containing the connecting rod big end; the connecting rod small end positioning assembly comprises a positioning block, a positioning plate and a floating supporting block, a V-shaped groove is formed in the side wall, close to the connecting rod small end, of the positioning block, the V-shaped groove of the positioning block, the positioning plate and the fine boring base jointly form a second positioning gap used for containing the connecting rod small end, and the floating supporting block is aligned to the positioning plate. According to the machining device and method, the connecting rod can be positioned, pressed and fixed for fine boring machining, error accumulation of connecting rod machining is eliminated by adjusting the height of the floating supporting block, the machining device and method are suitable for machining connecting rods of various types and specifications, fixing is reliable, dismounting and mounting are convenient, and the positioning precision and machining precision of the connecting rod are guaranteed.

The invention belongs to the technical field of aviation, and relates to an equidistant line drawing and hole forming device which comprises a graduated scale and an equalizer, and the graduated scale comprises an upper cover plate, a lower cover plate, a fixing hole, scales, a guide groove and a cavity; the equalizer comprises a first connecting piece, a pin shaft, a first drill bushing, a second drill bushing, a nut and a second connecting piece. The device is simple to operate, avoids the conditions of manual calculation of the equidistant size and calculation errors, avoids risks, and reduces the labor intensity; the device is high in reliability, error accumulation caused by multiple times of reference conversion when a steel ruler or a divider is adopted for line drawing is greatly eliminated, and the line drawing accuracy is greatly improved; the device can be used for drawing lines at equal intervals and directly drilling holes at equal intervals, so that the working efficiency is greatly improved.

The application discloses a mass spectrum combined characterization qualitative and quantitative method and system of unified hidden state, relates to the cross field of analytical chemistry, bioinformatics and artificial intelligence data processing, the method obtains original data and instrument / method metadata containing LC-MS / MS, encodes to form a condition vector and is used for conditional modulation, constructs wave encoder and particle encoder, respectively Tokenizes continuous chromatographic signal and discrete fragment peak set into wave encoder and particle encoder to obtain wave representation and particle representation, realizes cross-modal interaction through wave-particle fusion module, forms unified hidden state or object-level unified hidden state set, adopts two-stage training of self-supervised pre-training and task fine-tuning, and applies conditional quantitative operator and qualitative operator to unified hidden state or object-level unified hidden state set in the inference stage, and parallelly outputs quantitative results and identification score / probability, and is suitable for end-to-end qualitative and quantitative analysis in DDA / DIA scene.

The application discloses a path optimization system and method for an intelligent stringing robot, and relates to the technical field of artificial intelligence.The application realizes intelligent stringing robot path optimization through multi-dimensional innovation.Work sub-regions are divided according to power and dynamically matched with work ranges, device endurance and task requirements are accurately adapted, multi-machine collaborative scheduling efficiency is improved, and efficient execution of stringing tasks is ensured.A tilt detection system is constructed by means of vertical marker light and auxiliary analysis light, light projection deviation is quantified by combining image sensors, the tilt angle of the work area is accurately calculated, and reliable data is provided for path optimization.With the aid of tilt data interaction between multiple machines and the reference distance proportion compensation mechanism, the stringing path is dynamically corrected at the boundary of adjacent sub-regions, error accumulation caused by terrain differences is eliminated, and cable laying accuracy is ensured.Error analysis sets are established to realize data tracing and provide systematic support for construction process optimization, and work performance and construction quality are comprehensively improved.

The present application belongs to the technical field of material sorting, and particularly relates to a kind of crayfish commodity shrimp sorting device and method, including, annular conveying mechanism, multiple material box assemblies for carrying single shrimp one by one are arranged on it;Sorting unloading mechanism, and a plurality of sorting boxes are correspondingly arranged with sorting unloading mechanism;Annular conveying mechanism is arranged with righting guide rail on one side, and the bottom side of material box is in sliding contact with righting guide rail, so that when the annular conveying mechanism drives material box to move, under the constraint of righting guide rail, material box is gradually righted from the inclined unloading state to the horizontal loading state;The upper side of righting guide rail is uniformly distributed with a plurality of first air holes, and the jet direction of first air hole is directed to the material box in contact therewith.By constructing "closed loop sorting system", the overall efficiency of the system and the material utilization rate are improved, and the sorting accuracy and production efficiency are improved;Integrated online self-cleaning and friction-reducing maintenance function ensures the stability and sorting accuracy of long-term operation.

This invention relates to the field of resource allocation and task scheduling technology, and provides a method and device for intelligent event scheduling based on scheduling strategies. The method includes: configuring capability weights for each grid member; calculating their task allocation ratio within their respective grid based on these capability weights; storing the task allocation ratio, the total number of tasks in the grid within a period, and the number of tasks already allocated to each grid member as strategy data; triggering a scheduling process in response to a new event entering the system and being associated with a specific grid, and obtaining the strategy data corresponding to that grid; calculating the real-time availability index of each grid member within the specific grid based on the obtained strategy data, and selecting the grid member with the highest real-time availability index value as the target grid member; allocating the new event to the target grid member, and updating the number of tasks already allocated to that grid member in the strategy data. This invention can improve the rationality and execution efficiency of task allocation, and effectively ensure the compliance of long-term allocation strategies and the balance of the system.

The invention discloses an integrated laser head module and laser processing equipment, and belongs to the field of laser processing. According to the technical scheme, the integrated laser head module comprises a main body module, the main body module comprises a light path part and a transmission part, the light path part is provided with a collimation and alignment assembly mounting groove and a focusing assembly mounting groove, and the collimation and alignment assembly mounting groove is located above the focusing assembly mounting groove; a collimation and alignment assembly is installed in the collimation and alignment assembly installation groove, and a focusing assembly is installed in the focusing assembly installation groove. A transmission assembly action space is arranged in the transmission part, a transmission assembly is installed in the transmission assembly action space, the transmission assembly action space communicates with the focusing assembly installation groove, and the transmission assembly is connected with a focusing lens in the focusing assembly. According to the scheme, the integral main body module is used as an installation foundation, so that the structure and the assembly process of the laser head module are simplified; each part takes the main body module as a mounting basis, so that the problem of error accumulation is eliminated, and the machining precision is improved.

The present invention discloses an oblong hole skin lug locator and method based on laser tracker installation. The device comprises a positioning angle seat (1), a bushing (2) and a cylindrical pin (3); the positioning angle seat (1) is provided with a bushing mounting hole (11), and a positioning pin mounting hole (12) is provided next to the bushing mounting hole (11); an oblong inner hole (21) is provided on the central axis of the bushing (2), and a guide groove (22) is provided on the edge of the bushing (2); after the bushing (2) is installed in the bushing mounting hole (11), the positioning pin mounting hole (12) is aligned with the guide groove (22), and the cylindrical pin (3) can be inserted. The present invention solves the problem of accurate installation and position detection of the skin locator, and solves the problem of inconsistent hole positions of the skin locating holes.

This application discloses a unified latent state-based mass spectrometry joint characterization qualitative and quantitative method and system, involving the interdisciplinary fields of analytical chemistry, bioinformatics, and artificial intelligence data processing. The method acquires raw data from LC-MS / MS and instrument / method metadata, encodes it into conditional vectors, and uses them for conditional modulation. A wave encoder and a particle encoder are constructed, and continuous chromatographic signals and discrete fragment peak sets are tokenized and input into the wave encoder and particle encoder respectively to obtain wave and particle characterizations. Cross-modal interaction is achieved through a wave-particle fusion module to form a unified latent state or an object-level unified latent state set. A two-stage training process of self-supervised pre-training and task fine-tuning is employed. During the inference stage, conditional quantitative and qualitative operators are applied to the unified latent state or object-level unified latent state set, outputting quantitative results and identification scores / probabilities in parallel. This method is suitable for end-to-end qualitative and quantitative analysis in DDA / DIA scenarios.

The application provides an embroidery machine upper and lower shaft parallel zero finding control method and system in the technical field of embroidery machine control, and the method comprises the following steps: step S1, calibrating the upper zero position of the upper shaft motor and storing it; step S2, when the embroidery machine is started or receives a zero finding instruction, triggering a parallel zero finding process; step S3, controlling the jump motor to perform an action, and retracting the needle of the upper head to a jump-off position; step S4, synchronously performing the upper and lower shaft zero finding steps; the upper shaft zero finding step comprises the following steps: reading the upper zero position, writing the upper zero position back to the upper servo driver, and controlling the upper shaft motor to run to the upper zero position; the lower shaft zero finding step comprises the following steps: controlling the lower shaft motor to run to the lower zero position through the lower servo driver; step S5, obtaining the reading of the lower shaft encoder when the lower shaft is zero finding, and judging whether the actual position of the lower shaft reaches the standard or not; if not, position compensation is performed. The application has the advantages that the zero finding efficiency and system stability are greatly improved, and the hardware cost is reduced.

The invention discloses a device and method for adjusting pile position coordinates. The device comprises an outer frame which is a floatable or liftable steel structure frame and is used for providing a preliminary positioning and working platform; the inner formwork is arranged in the outer frame and used for bearing a plurality of positioning piles; the transverse adjusting mechanism is arranged between the outer frame and the inner formwork and used for driving the inner formwork and the positioning piles on the inner formwork to move in the transverse direction. The longitudinal adjusting mechanism is mounted between the transverse adjusting mechanism and the inner mold frame and used for driving the inner mold frame and the positioning piles on the inner mold frame to move in the longitudinal direction; and through cooperative action of the transverse adjusting mechanism and the longitudinal adjusting mechanism, accurate adjustment of the overall position of the multiple positioning piles is achieved. Through the cooperative working mechanism of coarse positioning of the outer frame and fine adjustment of the inner formwork, synchronous or sequential accurate positioning of the multiple pile bodies is achieved, the pile group construction efficiency is greatly improved, and the construction cost is reduced.

The present application relates to the field of data communication, and discloses a remote data communication platform for neurodegenerative disease exosome treatment, which is used for guaranteeing reliable transmission of key data in neurodegenerative disease remote monitoring. The exosome concentration data collected in the patient's body in real time is converted into dynamic parameters of a chaotic system through a nonlinear mapping rule, a parameterized chaotic system is constructed, a chaotic state signal carrying concentration information is generated, a composite transmission signal is formed by superposition, and the composite transmission signal is sent to a remote receiving end through a wireless channel. The state synchronization between the sending end and the copy chaotic system is achieved through a synchronization algorithm containing an error feedback term, the dynamic parameter estimation value is extracted, the exosome concentration data is restored through inverse nonlinear mapping operation, and the output data is output to a medical monitoring terminal after sliding window cumulative averaging. The present application effectively solves the problems of insufficient safety, weak anti-fading ability, low parameter estimation accuracy and large output data fluctuation of traditional medical monitoring in a wireless channel.