89results about How to "Avoid Cumulative Errors" patented technology

The invention provides a fusion positioning method and system for a dynamic environment of a well mine. The method comprises the following steps: establishing a prior map for positioning; acquiring first real-time point cloud data of the target vehicle, and registering point clouds which do not meet conditions in the first real-time point cloud data; judging the dynamic nature of the first real-time point cloud data, and removing dynamic points of the first real-time point cloud data to obtain second real-time point cloud data; acquiring first real-time IMU data, first chassis speed information and a first slam pose of a target vehicle; obtaining updated speedometer information by utilizing the initial attitude and the unit time pose transformation superposition; and carrying out fusion positioning on the updated odometer information, the second real-time point cloud data and the first real-time IMU data, and outputting final fusion positioning information. Based on the method, the invention further provides a fusion positioning system for the dynamic well mining environment. According to the invention, the influence of dynamic obstacles in the environment on positioning in a long corridor environment is eliminated, and the accuracy and robustness of positioning are improved.

The invention provides a fitting position detection method and system, a storage medium and electronic equipment, and relates to the field of size detection.The method comprises the steps that an area picture at any vertex angle of a to-be-detected piece is obtained, and two adjacent display screen outer contour straight lines and two adjacent glass outer contour straight lines on the to-be-detected piece are determined according to the area picture; respectively extending the display screen outer contour straight line and the glass outer contour straight line to determine a display screen right angle and a glass right angle, and determining a display screen angular bisector and a glass angular bisector; a display screen outer contour arc line and a glass outer contour arc line are determined through a preset method, intersection points of angular bisectors and the corresponding outer contour arc lines are determined respectively, the distance between the two intersection points is determined as a verification distance, and the included angle between the two angular bisectors is determined as a verification included angle. According to the verification distance, the verification included angle and the verification data, whether the fitting position of the to-be-detected piece is qualified or not is judged. According to the invention, the problem that the prior art lacks a fitting position detection method with high detection efficiency and precision is solved.

The invention discloses a tunnel central axis rapid extraction method based on point cloud data, and belongs to the technical field of tunnel engineering. According to the method, technologies such as global principal component analysis, local segmentation processing, RANSAC robust fitting and spline interpolation are innovatively combined, comprehensive analysis of the overall structure and local details of the tunnel is achieved, an efficient local splicing strategy is innovatively provided, the data processing amount is effectively reduced, the algorithm efficiency is improved, and the method is suitable for large-scale popularization and application. Segmentation processing and elliptic cylindrical surface model fitting are innovatively adopted, and adaptability to complex tunnel shapes is improved. According to the method, many limitations in the prior art are overcome, local features and global features are concerned at the same time, and a more efficient, more accurate and more reliable solution is provided for extraction of the central axis in tunnel engineering.

The invention relates to the technical field of semiconductor chip production, and particularly discloses semiconductor chip production and processing equipment which comprises a machine body, a workbench and a supporting plate, the workbench and the supporting plate are fixedly installed on the inner wall of the machine body, a placing table used for placing a wafer is fixedly installed at the top of the workbench, the supporting plate is located above the workbench, and an air cylinder is fixedly installed at the top of the workbench. The output end of the air cylinder penetrates through the supporting plate in a sliding mode and is fixedly provided with a driving plate, the bottom of the driving plate is provided with a rotary dispatching mechanism, a rail stripping mechanism and an annular cutting mechanism, and a follow-up ejection mechanism is arranged between the placing table and the driving plate. The whole process is completed in a full-automatic manner and is realized by utilizing the intermittent period of scheduling movement of the laser head, and the cutting time is not occupied, so that the stripping efficiency and the stripping quality are greatly improved, and the wafer production period does not need to be prolonged at the same time.

The present disclosure provides a shale reservoir fracture and brittleness prediction method based on Bayesian inversion, including: obtaining azimuth partial angle stacking seismic data, azimuth seismic wavelet and model parameter low-frequency model; obtaining prediction results based on the obtained azimuth partial angle stacking seismic data, azimuth seismic wavelet and model parameter low-frequency model, and a preset shale reservoir fracture and brittleness prediction model; wherein, the shale reservoir fracture and brittleness prediction model is established in the following process: deriving an approximate equation of the HTI medium longitudinal wave azimuth reflection coefficient containing a new brittleness indicator factor and fracture density; and establishing a shale reservoir fracture and brittleness prediction model based on the above relationship and the Bayesian AVAZ inversion method. The present disclosure effectively avoids the cumulative error in the indirect parameter conversion process and improves the accuracy of shale reservoir fracture and brittleness prediction.

The invention relates to a signal probability calculation method for reducing correlation errors of digital circuit signals, which comprises the following steps of: acquiring a circuit netlist file, and analyzing and extracting circuit topological structure information; constructing a directed acyclic graph of a circuit structure according to the circuit topological structure information, performing hierarchical division on the circuit structure, and searching fan-out nodes; calculating an initial signal probability result of each node of each level by utilizing a directed acyclic graph and combining a signal probability calculation basic formula; calculating a signal probability result of each node when different signal probabilities are set at the fan-out node, and performing weighted calculation to obtain a weighted signal probability result of each node; calculating an initial correction signal probability result of each node of each level; counting an initial signal probability result, a weighted signal probability result and an initial correction signal probability result, and calculating a final signal probability result of each node of the circuit in combination with an inference rule and a statistical result. According to the method, the accurate signal probability result of each unit of the circuit can be calculated.

The application discloses a kind of based on spot image moment feature telescope primary and secondary mirror calibration method, belong to telescope computer-aided alignment field.The specific steps of the calibration method are as follows, first, randomly give the free degree misadjustment of telescope system secondary mirror, utilize unbiased finite impulse response moment to extract the spot image feature of multiple field of view within reasonable range under the misadjustment state of telescope;Then utilize fully connected neural network to construct the model between the free degree misadjustment of secondary mirror and the multiple field of view spot image feature matrix;In actual use, after the multiple field of view spot image collected by CCD camera is extracted into feature matrix using unbiased finite impulse response, it is input into the trained neural network model to solve the misadjustment of secondary mirror, to guide the alignment of telescope system.This method aims to wavefront sensor as the image quality evaluation benchmark of telescope without, and without multiple iterations, to improve the efficiency of system primary and secondary mirror alignment and the imaging quality of system.

This invention belongs to the field of robot joint technology, specifically relating to a rope-driven, decoupled, dual-parallel five-DOF bionic shoulder joint, including a scapulothoracic joint mechanism, a glenohumeral joint mechanism, a drive base device, and drive ropes. The scapulothoracic joint mechanism and the glenohumeral joint mechanism are internally rotatably connected. The drive base device is used to fix the scapulothoracic joint mechanism and to provide drive ropes for both mechanisms. The scapulothoracic joint mechanism is constrained by a first constraint branch, a second constraint branch, and a decoupling through-line branch, satisfying the pure rolling two-DOF rotation requirement, driven by two sets of antagonistic drive ropes. The glenohumeral joint mechanism is driven by four independent drive ropes to achieve three-DOF rotational motion. The decoupling through-line branches distribute the drive ropes of the glenohumeral joint mechanism, achieving physical decoupling and ensuring that the drives of the two mechanisms do not interfere with each other. Through rope-driven and dual-parallel passive mechanisms, a larger range of motion can be achieved, improving the stiffness and load-bearing capacity of the mechanism.

This utility model discloses a portable positioning and calibration device for photovoltaic array construction, including a laser positioning instrument. An adjustment mechanism is provided on the back of the laser positioning instrument; the adjustment mechanism includes a slide rail, a slider, a clamping plate, and an adjustment rod; the slide rail is located on the back of the laser positioning instrument, and a slider is slidably connected to the inner wall of the slide rail. This utility model relates to the field of photovoltaic installation technology. This portable positioning and calibration device for photovoltaic array construction enables the adjustment of the position of the laser emitter, ensuring that the "reference point" for positioning and calibration completely coincides with the "design origin" of the photovoltaic system. This ensures the reliability of the laser line from the source, avoiding cumulative errors caused by eccentricity, simplifying the calibration logic during construction, and allowing subsequent component installation to "meet the standard by aligning with the line," ultimately improving the installation accuracy and construction efficiency of the photovoltaic array, while providing a unified reference for later system operation and maintenance.

The present disclosure provides an image processing method, device, equipment, storage medium and program product, relating to the technical field of computer. The method comprises: acquiring a to-be-processed image collected by a source device and color processing parameters under a plurality of environment color temperatures associated with the source device; wherein the color processing parameters are determined based on a reference initial color card image collected by a reference device, a source initial color card image collected by the source device and a gray block weight matrix; performing interpolation processing on the plurality of color processing parameters to obtain a target parameter according to the collection color temperature of the to-be-processed image; and performing white balance calibration processing and color restoration processing on the to-be-processed image according to the target parameter to obtain a target image. The method can integrate the parameters for white balance calibration and the parameters for color restoration, ensure the synergy of the calibration and restoration steps, and can also regulate the neutral color through the gray block weight matrix to eliminate the white balance deviation and realize high-fidelity restoration of the full-screen color.

The application discloses a single-knife digital three-side cutting paper cutting machine and belongs to the technical field of paper cutting machines. The paper cutting machine comprises a rack, a first conveying belt, a second conveying belt, a clamping assembly and a cutting assembly. The cutting assembly, the first conveying belt and the second conveying belt are arranged in the same direction and in a three-side half-enclosed layout, and a horizontal moving channel is formed in the middle. The clamping assembly is arranged in the horizontal moving channel and comprises a material taking sliding rail, a material taking screw rod, a sliding seat, a rotating mechanism and a material taking mechanism. The material taking mechanism can move along the horizontal moving channel and clamp materials. The rotating mechanism drives the material taking mechanism to rotate the materials by 90 degrees. The cutting assembly is used for sequentially completing three-edge cutting. The application solves the problems of poor positioning precision, low efficiency of manual rotation of the existing single-knife paper cutting machine, high cost and poor adaptability of traditional three-side cutting knives, realizes sequential cutting of books in a three-edge full-automatic, high-precision and high-quality mode, and has compact structure and is suitable for multi-variety batch production.

The utility model discloses a sand box structure is used in foundry processing of casting, including pit, lower box and upper box, be provided with lower box in pit, be provided with upper box at the top of lower box, be provided with the axle pole eye at the center of upper box, be provided with lower part cavity in lower box, be provided with inner core in lower part cavity, be provided with the locating plate at the top surface of inner core, be provided with the locating hole in the center of locating plate, and the locating hole is concentric with axle pole eye, pit. The utility model discloses adopt the mode of locating plate and axle pole eye intercoordination to carry out the closing of box, has guaranteed the alignment accuracy of upper and lower box higher, avoided the cumulative error in traditional cross line method, can realize the closing of box of higher accuracy, has greatly shortened the closing of box time, thereby has promoted the overall quality of casting.

The invention provides a carbon fiber prepreg paving real-time positioning calibration method and system. The method comprises the following steps: acquiring paving process parameters which influence the optical characteristics of the surface of a prepreg strip; collecting visual information of the edge of the prepreg strip, and extracting visual characteristics reflecting the optical characteristics of the surface of the prepreg strip from the visual information; presetting an association relationship between the paving process parameters and the visual features; receiving a visual measurement result indicating that the paving position of the prepreg strip has deviation; according to the paving process parameters, the visual features and the incidence relation, the source of paving position deviation is judged; and executing calibration or compensation operation according to the judgment result of the deviation source. According to the invention, invalid calibration or accumulative errors caused by misjudgment can be avoided.

The invention discloses a mechanical arm adjuvant therapy system and an actuator switching method. The mechanical arm adjuvant therapy system comprises a fixed ultrasonic reference system module, a replaceable execution end module, a mechanical arm and a control system. The fixed ultrasonic reference system module comprises an ultrasonic probe and a rigid connecting mechanism, the ultrasonic probe is connected with the mechanical arm through the rigid connecting mechanism, and a force sensor is arranged between the ultrasonic probe and the tail end of the mechanical arm; the replaceable execution end module comprises an electric clamping device, an actuator recognition sensor and a fine adjustment mechanism. The electric clamping device is provided with a mechanical interface and a force sensor used for detecting clamping force. The actuator recognition sensor is used for recognizing the category of the actuator; the fine adjustment mechanism is used for realizing fine adjustment of the position of the actuator after the replaceable execution end module switches the actuator; the replaceable execution end module is connected with the fixed ultrasonic reference system module through an electric clamping device, so that a mechanical arm can carry an ultrasonic probe and an actuator to move; the control system is used for controlling the mechanical arm to carry the ultrasonic probe and the actuator to complete treatment.

This utility model relates to the field of actuator technology, and in particular to a centrally positioned pneumatic actuator, comprising a cylinder body and a main shaft disposed inside the cylinder body. A piston is fitted on each side of the main shaft, and the piston drives the main shaft to rotate. The actuator also includes a positioning block, a first adjusting screw, and a second adjusting screw. A hexagonal post is disposed on the main shaft, passing through and connecting to the positioning block. The main shaft drives the positioning block to rotate coaxially via the hexagonal post. The first and second adjusting screws are threaded through the side wall of the cylinder body, and each end of the first and second adjusting screws inside the cylinder body has a first limiting end and a second limiting end, respectively. The first and second limiting ends are used to limit the contact with both ends of the positioning block. This utility model, with its centrally positioned limiting structure, allows for real-time adjustment of the actuator's stroke range.

The present invention provides a photovoltaic cleaning robot, a control method of the photovoltaic cleaning robot and an electronic device, and relates to the technical field of robot posture control. The photovoltaic cleaning robot includes an electrically connected controller, a drive motor, a first drive wheel, a second drive wheel and a plurality of stress sensors capable of generating voltage signals when subjected to force. When each stress sensor generates a voltage signal, the controller is used to obtain the current force condition of the photovoltaic cleaning robot through the voltage signal generated by each stress sensor, and determine the current posture of the photovoltaic cleaning robot according to the current force condition, and select a target control strategy corresponding to the current posture from a preset strategy set, and control the drive motor according to the target control strategy to adjust the current posture, thereby reducing the judgment error of the current posture and facilitating timely adjustment of the current posture.

The invention discloses a four-door two-cover flexible trimming die switching system, and relates to the technical field of automobile manufacturing equipment.The four-door two-cover flexible trimming die switching system comprises a lightweight trimming die unit and a switching mounting base, and the lightweight trimming die unit is detachably mounted on the switching mounting base through a robot grabbing device; the bottom of the light-weight edge rolling die unit is provided with a gun changing disc butt joint part, and the switching installation base is provided with an electric quick-plug device and a positioning locking device which are matched with the gun changing disc butt joint part. According to the invention, a split type framework of the lightweight trimming die unit and the switching mounting base is adopted, and a full-automatic die switching system is constructed through a robot automatic grabbing and gun changing disc rapid butt joint technology. A gun replacing disc butt joint part arranged at the bottom of the die body, an electric quick-plug device of the base and a positioning locking device form a standard interface, and a robot is matched for accurate grabbing and positioning, so that the die replacing process is optimized from traditional manual hoisting calibration to machine autonomous recognition butt joint.

The invention relates to the technical field of suspension bridge main cables, in particular to a method for erecting a continuous type suspension bridge main cable reference strand with an anti-sliding shear key, the reference strand is made of full-high-precision standard wires, and a continuous full-length type cable manufacturing mode is adopted. Comprising the following steps that S1, starting point mark points and terminal point mark points of all standard wires of a reference cable strand are aligned; s2, shear keys are fixedly installed at the span points of the reference cable strand, and the shear keys are matched with reserved notches of the cable saddle; s3, temporary fixing is conducted on the base line length marking position of the reference cable strand, and the reference cable strand is wound with a wrapping tape; and S4, temporary fixation is removed, the steel wires in the strands freely slide, and after the cable strands are stressed, the standard cable strands are erected with the average length naturally formed after standard wire length self-adaption as the length of the standard cable strands. According to the erecting method, the intra-strand error is effectively reduced, high-precision erecting can be achieved only by aligning the shear keys with the notches on site, sag adjustment is not needed, and the construction efficiency is improved.

The invention relates to the technical field of numerical control machine tools, and discloses a numerical control milling machine with a multi-hole-site synchronous machining function, which comprises a machine body, a workpiece mounting table, a first lifting driving mechanism, a lifting table, at least two distance adjusting tables and a control system. The workpiece mounting table is mounted on the machine body; the first lifting driving mechanism is mounted on the machine body; the output part of the first lifting driving mechanism is in driving connection with the lifting table; the lifting platform is provided with a first horizontal driving mechanism; the output part of the first horizontal driving mechanism is in driving connection with at least one distance adjusting table, so that the horizontal distance between the two distance adjusting tables is adjustable; the two distance adjusting tables are each provided with at least one second horizontal driving mechanism, each distance adjusting table is provided with at least two main shaft units, and the output portion of each second horizontal driving mechanism is in driving connection with at least one of the two main shaft units arranged on the same distance adjusting table. Therefore, the horizontal distance between the two main shaft units arranged on the same distance adjusting table can be adjusted. The hole distance between multiple spindles can be adjusted.

The utility model discloses a kind of fine adjustment positioning device of ballastless turnout laying turnout tie, belong to railway construction technical field, including first distance regulator and second distance regulator, its bottom is equipped with the first positioning hole matched with turnout tie bolt head, top is equipped with the first positioning mark corresponding bolt center, second distance regulator includes positioning component and clamping component, positioning component bottom is equipped with second positioning hole and second positioning mark and can be fastened to bolt head by lateral bolt, clamping component is composed of support, nut and clamping bolt.The utility model device is accurately matched by positioning hole and bolt head and top mark, ensure that measuring reference point is consistent, clamping component fixed measuring scale avoids its skew and tensioning force deficiency, effectively solve the problems, such as big accumulated error, operation is complicated in the measuring process of measuring scale, significantly improve measuring efficiency and consistency.

The invention provides a game score recording method and device, electronic equipment, a computer program product and a computer readable storage medium. The method comprises the steps that a first recording interface for games is displayed, a mode selection control is displayed on the first recording interface, each game comprises multiple rounds of games, the interaction score of each game is obtained by accumulating scores of all players in the multiple rounds of games, and the scores of all players in each round of games are determined and obtained based on the games result; in response to a mode selection instruction triggered based on the mode selection control, displaying a selected mode, in the selected mode, in response to a recording start instruction, displaying an initial score of each game party and a recording control corresponding to the selected mode, the recording control being used for recording the score by taking the initial score as a starting point of the score recording; and recording the score of the game partner in each round of game in the game. According to the method and the device, the score recording efficiency is improved, and the accuracy of the recorded score can be ensured.

This invention provides an obstacle segmentation method, apparatus, electronic device, and storage medium, relating to the field of target recognition technology. The method includes: acquiring translational and rotational extrinsic parameters of multiple sensing devices in a device coordinate system, wherein the multiple sensing devices are positioned on a device under test corresponding to the device coordinate system; the translational extrinsic parameters are determined based on the spatial position parameters of each sensing device in the device coordinate system, and the rotational extrinsic parameters are determined based on the attitude tilt angle parameters of each sensing device in the device coordinate system; calculating a global point cloud based on the translational and rotational extrinsic parameters, wherein the global point cloud is a stitched result of the point clouds of multiple sensing devices in the device coordinate system; performing ground segmentation on the global point cloud, removing the ground point cloud to obtain an obstacle point cloud; projecting the obstacle point cloud into a two-dimensional grid map, and determining the obstacles corresponding to the obstacle point cloud based on the two-dimensional grid map. This application can meet the stable perception requirements of autonomous driving systems in complex environments.

This invention discloses an integrated ranging and velocity measurement method based on single-photon lidar, belonging to the field of high-precision laser detection technology. The method includes: obtaining the absolute detection time sequence of the photon response in the echo signal by referring to the absolute time of the zero point at the receiver; calculating the fundamental frequency f' of the echo signal and obtaining the pulse period t of the echo signal. r '=1 / f'; based on t r 'With the pulse period t of the transmitted signal r The Doppler equation is used to obtain an estimate of the target's radial velocity, calculate the relative detection time after motion compensation, and obtain an initial estimate of the initial photon flight time. Substituting these values ​​into the maximum likelihood estimation function, gradient optimization is performed to obtain its local optimum, thus achieving integrated measurement of the target's range and radial velocity. This invention enables the simultaneous acquisition of range and radial velocity in the same physical process.

The utility model discloses a tungsten steel step type inner hole drill bit, including drill handle, drill body and setting cutting portion in front of drill body, the drill handle is used for with lathe main shaft connection, the drill body is the main body support structure of drill bit, its inside is equipped with cooling channel, the cutting portion includes fixed cutting tool bit and movable cutting tool bit, the fixed cutting tool bit fixed mounting is in the top of drill body, the movable cutting tool bit movable mounting is in the inside of drill body, the inside of drill body is provided with movable slot for installing movable cutting tool bit, is connected with tool bit removal control subassembly on movable cutting tool bit, tool bit removal control subassembly drives movable cutting tool bit and moves in movable slot radial movable to adjust cutting diameter. The utility model has realized to the one -time processing of step type inner hole, need not multiple replacement different specifications' tool, has greatly simplified the operation process, has improved processing efficiency.

The application discloses a kind of remote sensing time series data analysis method and system considering the spatio-temporal correlation of geographical object, belong to data analysis technical field.The method includes: obtaining multi-source multi-temporal remote sensing image and auxiliary data and pre-processing, generate consistent time series data stack;In three-dimensional space-time domain, image is divided into voxel and is adjacent tracking, identify geographical process object with evolution behavior and record its attribute;Determine the spatio-temporal topological relationship between geographical process object, generate unified spatio-temporal relationship table by composite reasoning;With geographical process object as node, spatio-temporal relationship as edge constructs geographical process object spatio-temporal graph model, extracts and standardizes the attribute characteristics of node and edge;Importance index of each node is calculated by using graph convolution network and topological dynamic mechanism joint modeling.The application realizes closed-loop analysis from data processing, relationship modeling, importance evaluation to decision support, improves the interpretability and decision effectiveness of remote sensing time series change detection.

The invention belongs to the field of electric power, and discloses a high-voltage cable grounding system induced current vector synthesis analysis method and device, and the method comprises the steps: synchronously collecting grounding current signals of a three-phase metal sheath of a high-voltage cable and synthesis current signals of each phase wire core through double Rogowski coils with consistent linearity, the synthesized current signal is a superposition value of the running current and the circulating current component; carrying out point-by-point subtraction on the synthetic current sampling value and the grounding current sampling value which are in the same phase so as to counteract a ring current component in the synthetic current signal; absolute values of the difference signals are obtained and summed, and a summed value is converted into a real operation current value through a preset segmented calibration curve; respectively carrying out discrete Fourier transform on the grounding current signal and the difference signal, representing by complex numbers of the two signals under power frequency, and calculating a quotient represented by the complex numbers to obtain a phase difference between the grounding current signal and the difference signal; and determining the system state of the high-voltage cable grounding system based on the operation current value and the phase difference.

The application relates to a non-motor vehicle trajectory prediction method, which comprises the following steps: calculating a feasible domain of a terminal point of a non-motor vehicle to be detected based on to-be-predicted scene information, and obtaining a feasible terminal point set through discrete sampling; adopting a deep learning model which is constructed and trained in advance, and generating an alternative trajectory set of the non-motor vehicle to be detected according to the to-be-predicted scene information and the feasible terminal point set; adopting a behavior analysis model of the non-motor vehicle which is constructed in advance, evaluating the alternative trajectory set, and selecting a maximum utility trajectory; and the behavior analysis model is used for calculating trajectory utility, and the trajectory utility is quantified as a sum of expected trajectory risk and trajectory efficiency heterogeneity. Compared with the prior art, the application can adapt to the flexible and changeable behavior characteristics of the non-motor vehicle, has certain advantages in eliminating cumulative errors in iterative prediction and trajectory prediction for sudden behaviors of the non-motor vehicle, and greatly improves the accuracy and reliability of the non-motor vehicle trajectory prediction.

The invention relates to the technical field of liquefied gas storage, and provides a corner corrugated plate forming device and method.The device comprises a pre-pressing mechanism and a forming mechanism, the pre-pressing mechanism comprises a lower edge pressing block capable of moving up and down and a pre-pressing female die above the lower edge pressing block, and the lower edge pressing block is provided with a V-shaped notch and used for pre-bending a metal plate; the forming mechanism comprises a forming female die and a forming upper die part matched with the forming female die; the forming female die comprises two positioning parts used for bearing and positioning a metal plate and a concave part located between the two positioning parts. The upper forming die part comprises an elastic edge pressing assembly and a forming male die. In the forming process, the elastic edge pressing assembly is firstly pressed and located, then the elastic edge pressing assembly is compressed, the forming male die enters the concave part, and final forming is completed, so that accumulative errors caused by repeated clamping and manual intervention in a traditional multi-process technology are effectively avoided, and the quality requirements of the corner corrugated plate for the corrugation shape consistency and the size stability are met; and the production efficiency is also improved.

This application relates to a feeding mechanism and feeding system, comprising: a frame; a first drive assembly including a first lead screw rotatably mounted on the frame about its own axis; a clamping assembly including two clamping mechanisms spaced apart along a second direction, the two clamping mechanisms being used to clamp the two sides of the workpiece respectively; the first lead screw being configured to drive the clamping assembly to move back and forth along a first direction; and a second drive assembly, tractively connected to the clamping assembly, to drive the two clamping mechanisms to move closer or further apart along the second direction; wherein the first direction is perpendicular to the second direction. The feeding mechanism and feeding system of this application have the advantage of high conveying accuracy.

This utility model relates to the field of automotive exhaust manifold technology, specifically a multi-angle positioning milling fixture for exhaust manifolds. It includes a drive component, with columns symmetrically mounted on the top of the drive component. A lifting component is vertically slidably mounted on the column, and a clamping component is mounted on the lifting component. A sleeve is vertically provided on one side of the lifting component, which slides vertically with the column and can rotate on the column to adjust the angle, and is locked in place by a locking bolt. In this multi-angle positioning milling fixture for exhaust manifolds, the vertical sliding and rotational engagement of the sleeve of the lifting component with the column allows for angle adjustment, and the locking bolt enables quick fixation, meeting the multi-faceted and multi-directional milling requirements of the exhaust manifold. It avoids the cumulative errors caused by multiple clamping operations, significantly improving the machining accuracy of each port and mounting surface, effectively ensuring the power performance and exhaust emission standards after engine assembly.