28results about How to "Guaranteed error" patented technology

The invention relates to the technical field of semiconductor critical dimension measurement, and particularly provides a device compatible with critical dimension small-angle X-ray scattering measurement and X-ray reflectivity measurement, which comprises an SAXS light source unit, an XRR light source unit, an SAXS detection unit, an XRR detection unit and a multi-degree-of-freedom sample table for bearing a sample and driving the sample to rotate, the SAXS measuring light and the XRR measuring light are perpendicular to each other in light path intersection point positions on the multi-degree-of-freedom sample table, the SAXS measuring light is transmitted and passes through a measuring point, the XRR measuring light is reflected by the measuring point, and when the multi-degree-of-freedom sample table rotates to a preset angle range, the SAXS detection unit and the XRR detection unit can synchronously perform SAXS measurement and XRR measurement on a sample, so that the SAXS measurement and the XRR measurement are synchronously performed. The consistency of data obtained by two measurement technologies in spatial positions is ensured, extra time required for transferring samples among different measurement systems is also avoided, and CD-SAXS measurement and XRR measurement of the same measurement point can be simultaneously and synchronously realized through one device.

The invention relates to a method for manufacturing a low-wavefront-error double-blazed grating for electron beam gray lithography, which comprises the following steps of: decomposing dose parameters of an electron beam into average dose and dose difference, decomposing grating parameters into grating height and grating depth, and constructing a mathematical model between the average dose and the dose difference; through differential calculation and least square fitting, the relation between the dose parameter and the height and depth of the grating is optimized, and then high-precision manufacturing of the target grating is achieved. The method comprises the following specific steps: firstly, decomposing dose and grating parameters, and establishing a first mathematical model among grating height, depth and dose parameters; and then obtaining relational data through an experiment, performing optimization calculation by using the second mathematical model, and finally obtaining a dose parameter corresponding to the target grating. And finally, manufacturing the double-blazed grating with the low wavefront error according to the target parameters. According to the method, wavefront errors can be effectively reduced, the photoetching precision is improved, and the method has relatively good manufacturing consistency and is suitable for the production requirements of high-precision gratings.

The invention provides a preset time tracking control method based on a vehicle model, and aims to improve the response rate under the condition of vehicle following, reduce the problem of'ghost vehicle 'under the condition of vehicle following, and improve the traffic efficiency. On the basis that air resistance, ramp resistance and rolling resistance borne by the following vehicle in the vehicle following process are considered, the preset time control theory and vehicle tracking control are combined, and the controller is designed to achieve tracking control over the vehicle within the safe vehicle distance. The controller needs to meet two requirements of tracking stability and position tracking error convergence, that is, in the vehicle tracking control process, it needs to be guaranteed that a stable relation exists between the motion state of a following vehicle and the motion state of a front vehicle; namely, the following vehicle should keep the speed consistent with that of the front vehicle within the preset time so as to ensure safe vehicle distance driving, meanwhile, the position tracking error of the rear vehicle is converged to a field near zero within the preset time, and it is ensured that the rear vehicle accurately follows the front vehicle.

The invention provides a ship block pose accurate measurement and calculation method, which comprises the following steps: step 1, carrying out measurement point location arrangement, including selection and arrangement of key measurement points, selection and arrangement of relative measurement points on the side surface of a block, and selection and arrangement of common reference points; 2, based on the measurement points in the step 1, block data measurement is carried out, and point position measurement is carried out based on the constructed coordinate system; step 3, carrying out coordinate transformation on the measurement data, and solving the relevance between two coordinate systems; and 4, calculating the pose of the block based on a three-point method and an improved ICP (Inductively Coupled Plasma) to obtain the pose information of the block. According to the method, the arrangement scheme of key measurement points, public reference points and an overall measurement system is designed in combination with block alignment characteristics, so that a high-precision measurement system is built; a mode of combining initial matching of a three-point method and an improved ICP algorithm is proposed to solve the pose of the total segment; quicker and more accurate matching is realized, and the iteration rate and the matching precision are respectively improved.

The invention provides a distributed steer-by-wire vehicle fault-tolerant control method. The method comprises the steps that a distributed steer-by-wire vehicle dynamics model, a two-degree-of-freedom reference model and a steering motor failure model are established; in the design of the upper fault-tolerant controller, a self-adaptive terminal sliding mode control method is adopted, the method has the characteristics of high robustness and self-adaptive parameter change, and the robustness of the system can be considered while the target tracking performance is ensured. In the design of a lower-layer torque and rotation angle optimal distribution reconstruction controller, a failure factor is introduced, two more objective functions are established on the basis of minimizing the tire load rate, and errors between longitudinal and lateral forces and expected target values and errors between yawing moment and additional yawing moment are reduced while the optimized objective functions are ensured to have solutions. According to the method, the uncertainty of the system during the steering failure is fully considered, and the robustness of the system can be considered while the target tracking performance is ensured, so that the control stability of the distributed steer-by-wire vehicle during the steering failure is improved.

The present invention relates to the technical field of gas concentration detection based on NDIR technology, and discloses a gas concentration detection method based on NDIR technology. Selecting a standard gas sample with a known concentration is the basis of the experiment to ensure data accuracy. Containers of the same volume and serial numbers help eliminate errors and facilitate operation. The constant temperature box provides a stable environment, controls temperature and humidity, and ensures consistent experimental conditions. A temperature and humidity range with a 15% floating amplitude is set to simulate different conditions, find the best compensation strategy, and improve measurement accuracy and stability. The mixed gas collection device collects samples comprehensively, multiple air inlet pipes and different height settings ensure sample representativeness, and valves and vacuum pumps control the flow rate to ensure sample stability. The monomer gas collection device collects samples at specific points in a centralized manner. The errors caused by changes in temperature and humidity are corrected by the compensation method, and the final result is more accurate.

The invention discloses an air conditioner panel control method and system for cold and heat exchange in a commercial vehicle, and relates to the technical field of automobile control. Generating at least one measurement and control operation instruction; a user adjusts and controls the temperature and the humidity on the air conditioner panel; judging whether the characteristic measurement and control operation instruction appears in a mark set or not; comparing whether the difference between the final temperature and the final humidity and the characteristic temperature and the characteristic humidity of the characteristic measurement and control operation instruction is greater than a preset value; when the characteristic measurement and control operation instruction is an unqualified instruction, obtaining a preset binary signal; and summarizing the marked feature measurement and control operation instructions into a mark set. By arranging the set setting module, the instruction generation module, the instruction judgment module, the gap comparison module, the quality marking module and the bipartite adjustment module, the calculation power can be saved, and it is ensured that the error between the adjustment of the temperature or humidity generated in different vehicle types and the required numerical value is within the allowable range.

The invention relates to the field of microbiological examination laboratory equipment, and discloses a drying and disinfecting device and method for a specimen glass slide for microbiological examination. The device comprises a machine shell, a motor and a controller, the detachable rotating shaft is in transmission connection with the driving motor; the support frame is detachably arranged on the detachable rotating shaft and forms a plurality of mounting surfaces; the glass slide mounting plate is detachably mounted on the mounting surface, and a plurality of glass slide mounting stations are arranged on the glass slide mounting plate; the drying module comprises a drying lamp; the disinfection module comprises an ultraviolet disinfection lamp; and the control module is electrically connected with the driving motor, the drying module and the disinfection module and is used for executing a drying program and a disinfection program. The problems that in an existing glass slide processing method, the drying capacity and uniformity are difficult to consider at the same time, the drying process is uncontrollable, and low efficiency and safety risks are caused by separation of the drying process and the disinfection process are effectively solved.

The invention relates to the technical field of rotor blade assembly, and discloses a C-shaped beam structure composite material rotor blade positioning and assembling method which comprises the following steps: S1, designing and using a positioning and assembling platform, and arranging a laser scanner to monitor the butt joint precision of a blade and a rotating shaft in real time; s2, preliminarily fixing the paddle and the rotating shaft through an adjusting clamp, and checking the preliminary positioning by using a laser scanner; s3, carrying out a thermocuring fixing process, namely heating the paddle to a preset temperature, fixing the paddle and the rotating shaft by adopting an adhesive after curing, and locking by using a mechanical clamp; s4, detecting the contact surface of the paddle and the rotating shaft by using a laser scanner; and S5, the connecting part of the paddle and the rotating shaft is reinforced through a bolt. The connection strength of the paddle and the rotating shaft is greater than or equal to 50MPa by adopting a thermocuring process and combining epoxy resin or a polyurethane-based adhesive, and the strength of the connection part is further improved through bolt reinforcement and enhanced curing treatment.

The invention relates to the technical field of pressure vessel detection, and discloses a special equipment detection auxiliary positioning device which comprises a workbench, a placing table is fixedly installed at the top of the workbench, a pressure vessel is placed at the top of the placing table, and clamping assemblies are arranged on the two sides of the pressure vessel. A clamping assembly is arranged on the upper portion of the pressure container, a detection instrument is arranged above the pressure container, a moving assembly is arranged outside the detection instrument, two linkage assemblies are arranged between the clamping assembly and the moving assembly, and the clamping assembly, the moving assembly and the linkage assemblies are matched with one another, so that the pressure container can rotate by 90 degrees after the detection instrument performs moving detection every time; according to the invention, the pressure container is arranged on the detection head, so that the undetected surface is just positioned below the detection instrument, the omission ratio is reduced, errors and result non-repeatability caused by relative position difference of the pressure container and the detection head are avoided, and the detection result is more accurate and reliable while comprehensive detection is ensured.

The invention belongs to the field of sensor packaging processes, particularly relates to a manufacturing method of a multi-chip coplanar splicing structure for an image sensor, and aims to solve the problem of poor flatness of the multi-chip coplanar splicing structure. According to the invention, the high-rigidity adapter plate is used as a base plane, a bonding area is optimized into a uniform plane, and coplanar positioning is carried out by using a positioning ball of the adapter plate. According to the invention, by using a one-time chip mounting mode, all chips are ensured to be uniformly stressed all the time in the processes of picking, mounting and pressurizing, the coplanarity of multi-chip coplanar splicing can be effectively improved, and errors are reduced.

The application relates to the technical field of mechanical arm trajectory tracking control and discloses a high-order integral barrier function mechanical arm trajectory tracking control system design based on an adjustment parameter, wherein the trajectory tracking control method comprises the following steps: acquiring joint state data, and calculating joint angle tracking errors; performing normalization processing on the tracking errors based on an improved preset performance function with an adjustable constant base; substituting the normalized errors into a high-order integral barrier function with an adjustment parameter, and calculating a total barrier function value; calculating a virtual control law based on the time derivative of the barrier function value; estimating unknown external forces by using a disturbance observer; and calculating control input torques by comprehensively using the above results and outputting the control input torques to joint drives. The application realizes flexible adjustment of the convergence speed of tracking errors, reduces the control complexity, and guarantees the stability of a closed-loop system under external disturbance conditions.

The utility model belongs to the technical field of vacuum self-consuming furnaces, and discloses a centering device of a vacuum self-consuming furnace, which comprises a lower furnace body flange, a crucible flange and an upper furnace body flange, the crucible flange is connected onto the lower furnace body flange, the upper furnace body flange is connected onto the crucible flange, and the lower furnace body flange, the crucible flange and the upper furnace body flange are coaxial. The outer diameter of the lower furnace body flange is larger than that of the crucible flange and that of the upper furnace body flange, the outer diameter of the crucible flange is the same as that of the upper furnace body flange, three threaded holes are evenly formed in the end face of the lower furnace body flange at intervals, the threaded holes are formed in the lower furnace body flange in a penetrating mode, through holes are formed in the upper end faces of the guide columns in a penetrating mode, and the guide columns are in threaded connection with the threaded holes through bolts. The guide column comprises the guide column upper portion and the guide column base body, the guide column is used for guiding the crucible and the lower furnace body to be centered, the problems that the product quality is affected by furnace charging deviation, the crucible is prone to being damaged and the like can be avoided, the guide column can be rotated by an angle to be continuously used after being abraded, the service life of the guide column is prolonged, and the production cost is saved.

The invention relates to the technical field of automobile pedal testing, and discloses an intelligent networked automobile pedal testing device which comprises a shell and a base, the base is arranged at the bottom of the shell, a fixing support is fixedly connected to the surface of the shell, a groove is formed in the top of the fixing support, and a supporting rod is fixedly connected to the groove in the top of the fixing support. A pedal plate is fixedly connected to the bottom end of the supporting rod, and a sensor is fixedly connected to the upper surface of the pedal plate, so that the problem that a test result is lack of objectivity due to the influence of subjective consciousness and individual differences of testers during manual testing is avoided, and the problems of fatigue, inattention and the like in the testing process are solved; according to the invention, the test result is not accurate due to the fact that the test device needs to be manually treaded for testing, manual operation and errors are reduced, the labor cost and risks are reduced, pressure can be flexibly adjusted for testing, real use conditions can be stably simulated, and the accuracy and reliability of the test result are ensured.

The invention relates to the field of wavefront measurement, in particular to a two-dimensional diffraction grating high-precision alignment method of a four-wave lateral shear interference measurement system, which realizes high-precision alignment of a two-dimensional diffraction grating in combination with an autonomously built microscopic imaging system, optimizes the design of the microscopic imaging system, and improves the accuracy of two-dimensional diffraction grating alignment. The alignment system provides degrees of freedom in the x direction, the y direction, the longitudinal direction and the rotation direction, the light path system can perform two-dimensional diffraction grating alignment through movement and rotation in the four directions, the coaxiality and parallelism errors generated by alignment of optical elements are compensated, the accuracy and convenience of two-dimensional diffraction grating alignment are remarkably improved, and the accuracy and accuracy of two-dimensional diffraction grating alignment are improved. The diffraction efficiency and various properties of the two-dimensional diffraction grating are ensured, the problems of large alignment difficulty and low alignment precision of the micron-order periodic grating are solved, and the wavefront reconstruction efficiency and precision of the four-wave lateral shear interference wavefront measuring instrument are improved.

The invention relates to a gluing path planning method based on an industrial robot. According to the method, a real component gluing process is taken as an example, a simulation model is established by applying three-dimensional software, a gluing path is generated by utilizing an automatic path function in the simulation software, and the gluing path is optimized by adjusting and optimizing point position poses, an axis parameter configuration method, collision monitoring and track operation simulation technical means to generate a motion track. Compared with a traditional method for generating a track path through industrial robot field teaching point programming, the path path generated after automatic path function optimization in virtual simulation software is adopted is better in fitting degree with the geometric body curved surface contour, the gluing thickness is more uniform, and the gluing quality and efficiency are higher.

The utility model discloses a detection tool for a microswitch of an electric energy meter. The detection tool comprises a driving mechanism, a guiding slide rail, a touch seat and at least two fixing seats. The fixing seat is provided with a fixing groove which is used for installing the microswitch. The guide sliding rails are located between every two adjacent fixing bases. The touch seat is slidably mounted on the guide sliding rail, and a touch bulge is arranged at the position, corresponding to the fixing groove, of the touch seat; the driving mechanism is used for driving the touch seat to reciprocate on the guide slide rail; according to the detection jig for the microswitches of the electric energy meter, the touch seat capable of reciprocating is arranged between the two adjacent fixed seats, and the touch test of at least two microswitches can be realized through the single reciprocating motion of the touch seat. According to the design, the detection efficiency is remarkably improved, the complexity of manual operation is reduced, and meanwhile, the accuracy and consistency of detection are ensured.

The present invention provides a method, device, computer equipment and storage medium for detecting cracks in electric equipment. The method comprises: displaying original image data collected by a camera on the detection interface, adjusting the camera according to shooting parameters, loading a calibration frame on the detection interface, generating target image data when the calibration frame overlaps with a two-dimensional code, segmenting the semantics of each element in the electric equipment in the target image data as feature image data, calculating the difference between the feature image data of this cycle and the feature image data of the previous cycle, obtaining incremental cracks, determining that the incremental cracks are newly added cracks in the electric equipment or cracks enlarged on the original cracks, filling the newly added cracks with a new color, and filling the cracks enlarged on the original cracks with a color different from the original cracks, so as to ensure the accuracy of detecting incremental cracks with a small error, so as to accurately evaluate the status of the electric equipment.

The invention discloses a self-adaptive discretization method for a segmented equal-angle cutter spiral line path, and belongs to the technical field of optical product machining. Firstly, a spiral path of a cutter is planned according to a designed curved surface; initial parameters including a bow height error range and an increment angle are set, and a discrete angle of the first segmented area is obtained; adding the discrete angle of the current segmented area to the increment angle to obtain a discrete angle of a next segmented area; the bow height error is updated based on the discrete angle of the next segmented area, and the radius value of the next segmented area is obtained by adopting the dichotomy with the bow height error range as the constraint; and finally, iteratively acquiring a discrete angle and a radius value of each segmented region by segmented regions, and discretizing the spiral path by using the discrete angle and the radius value of each segmented region. Under the constraint of the bow height error range, the discrete angle is dynamically adjusted, and the machining precision of the complex curved surface can be effectively improved.

The present invention provides a photovoltaic power source equivalent method and device suitable for medium voltage distribution network fault analysis without reactive support capability, the method comprising: step 1: determining the overcurrent coefficient k by comparing the maximum output current of the inverter with the rated output current; step 2: determining the overall equivalent relative error D1 by using the overcurrent coefficient k; step 3: determining the equivalent relative error upper limit D2 according to actual needs; step 4: comparing the size relationship between the overall equivalent relative error D1 and the equivalent relative error upper limit D2, judging whether the equivalent method adopts overall equivalence or segmented equivalence; step 5: calculating the equivalent circuit parameters of the photovoltaic power source according to the judgment result of step 4. The present invention proposes two equivalent methods, overall and segmented equivalence, for photovoltaic power sources without reactive support capability, and adopts the best consistent approximation method to obtain the best equivalent voltage and equivalent resistance parameters, with higher simulation accuracy, without the need for complex optimization methods, and ensuring the simulation effect or expected errors.

The utility model discloses a TIG (Tungsten Inert Gas) surfacing positioning device for metal valve sealing surface additive manufacturing, which comprises a clamp, the clamp is connected with a welding gun driving device, the welding gun driving device is detachably connected onto a horizontal telescopic device, a telescopic pipe is arranged above the clamp, one end of the telescopic pipe is positioned in a pipe sleeve, the other end of the telescopic pipe is movably connected with a bracket, and the bracket is connected with a welding gun. The support is connected with a laser distance measuring sensor, the laser distance measuring sensor is connected with a controller, the rotating angle of the support ranges from 90 degrees to 180 degrees, and the horizontal telescopic device is a double-acting air cylinder. The weight of moving parts is greatly reduced, so that the driving energy consumption is reduced, and when the air cylinder breaks down, only the air cylinder needs to be replaced or maintained.

The invention relates to the technical field of bird probing radar data processing, in particular to a bird probing radar data processing system and method for small target optimization, the system comprises a data acquisition module, an adaptive filtering module and a graph neural network processing module, the data acquisition module acquires radar data and expected data; the adaptive filtering module dynamically adjusts the step length and the weight based on the current error in the filtering process by setting the initial step length and the weight, and generates a radar feature vector; and the graph neural network processing module generates a target node according to the radar feature vector, defines an edge weight through an adjacent error, calculates an attention weight, and finally updates the radar feature vector of the target node, so that the precision and stability of small target signal extraction are improved, and the problems of signal noise and parameter fixation in a traditional method are solved.

This invention specifically relates to a network fault detection method based on multi-boost ensemble learning, comprising: inputting network connection records into a trained fault detection model and outputting corresponding network fault prediction values; during training, firstly, a training sample set is obtained; secondly, the training sample set is input into the convolutional neural network of the fault detection model for preliminary learning, resulting in several CNN base classifiers; then, an adaptive boosting algorithm is used to focus on training samples misclassified during the training of the CNN base classifiers, and a corresponding AB model is constructed based on the CNN base classifiers; then, corresponding sub-decision groups are constructed based on the AB model, and the outputs of each sub-decision group are weighted and summed using a multi-boost algorithm to generate corresponding network fault prediction values, thereby optimizing the fault detection model. This invention is well-suited for network fault detection and can guarantee the accuracy and generalization error of network fault detection, thus improving the effectiveness of network fault detection.

The utility model provides a lens surface shape detection tool comprising a pedestal which can be fixed on a non-contact three-dimensional optical contourgraph; the reference positioning mechanism is arranged in the center of the base, and at least one part of the reference positioning mechanism can reflect an optical signal emitted along the central axis of the non-contact three-dimensional optical contourgraph, so that the lens surface shape detection jig and the non-contact three-dimensional optical contourgraph share the same reference; the limiting mechanism is arranged on the base, the limiting mechanism is used for fixing the position of the lens so that the lens can be located in the center of the base, at least one part of the limiting mechanism makes contact with the non-effective diameter part of the lens so that the lens can be fixed in the direction perpendicular to the base, and at least the other part of the limiting mechanism makes contact with the outer periphery of the lens; and the lens is fixed in a plane parallel to the base. According to the utility model, the problem of large lens surface shape detection error in the prior art is solved.

The application discloses a double-end traveling wave fault location method based on wavelet transform and Teager-Kaiser energy operator (TKEO), which is applied to a 800V direct current hydrogen production line. In order to improve the accuracy of fault identification and the precision of fault location, firstly, wavelet transform is performed on a fault signal, a soft threshold is used for denoising and the signal is reconstructed; characteristic information of each wavelet decomposition layer is extracted and analyzed, and the fault type is determined according to the energy ratio of high-frequency and low-frequency decomposition layers; secondly, TKEO is used to extract the instantaneous energy spectrum after wavelet decomposition, and the sampling points of the first wave head reaching the two ends of the direct current line are accurately calibrated; finally, the double-end ranging method is used to accurately solve the fault distance.

The present invention relates to the technical field of bird-detecting radar data processing, and specifically to a bird-detecting radar data processing system and method optimized for small targets. The present invention includes a data acquisition module, an adaptive filtering module and a graph neural network processing module, wherein: the data acquisition module acquires radar data and expected data; the adaptive filtering module dynamically adjusts the step size and weight based on the current error during the filtering process by setting an initial step size and weight to generate a radar feature vector; the graph neural network processing module generates a target node according to the radar feature vector, defines edge weights through adjacent errors, calculates attention weights, and finally updates the radar feature vector of the target node. This scheme improves the accuracy and stability of small target signal extraction and solves the signal noise and parameter fixation problems in traditional methods.

The invention belongs to the field of intelligent manufacturing, and discloses an intelligent factory full-process automatic production system and method based on cloud collaboration, and the system comprises a physical performance sensing array, an edge calculation processing node, a cloud central scheduling server, a field production execution mechanism, and a communication network link. The sensing array collects state characteristics, and edge nodes extract performance deviation; and the cloud server constructs a dynamic scheduling model by using a neural network predictive control architecture, and dynamically adjusts the process priority according to an efficiency attenuation predicted value in combination with a minimum global cost function. According to the method, deep coupling of bottom-layer control and upper-layer scheduling is realized, hidden faults can be effectively pre-judged, errors can be compensated online, and the optimality of resource configuration and the continuity of production are ensured.