36results about How to "Realization error" patented technology

The invention discloses a movement capturing method based on multiple binocular stereo vision. A movement video collecting device is constructed, and human movement video sequences from different orientations are collected by the movement video collecting device. Multiocular movement video sequences shot by a plurality of cameras are calibrated. Marked points matching and tracking of each binocular tracker is finished. Data fusion of three-dimensional tracking result of multiple binocular trackers is completed. The three-dimensional movement information of the marked points acquired by a multiocular fusion device is fed back to the binocular tracker to consummate binocular tracking. On the basis of binocular three-dimensional tracking realized by binocular vision, the invention fuses multiple groups of binocular three-dimensional movement data, resolves parameter acquiring problem of three-dimensional position, tracking, track fusion and the like for a plurality of marked points, increases number of traceable market points and enables the tracking effect to be comparable with three-dimensional movement acquiring device employing multi-infrared cameras for collecting.

The invention discloses a self-adaption profile modification blade abrasive belt polishing machine tool, comprising a machine tool body, an X-axis carriage, an X-axis carriage, a C-axis rotary table, a Y-axis sliding block, an abrasive belt polishing head component, an air cylinder, and the like, wherein a pressure compensation element is in series connection between the abrasive belt polishing head component and the air cylinder to cooperate with the air cylinder to form a polishing contact pressure. During machining, the polishing machine tool performs interpolation feed according to an ideal polishing track; due to the existence of a blade profile error (or waveness), the polishing contact point deviates from the ideal polishing track in a pressure shaft direction, and the acting pressure of the pressure compensation element changes along with the deviation, so as to realize the polishing contact pressure compensation; the pressure compensation element can utilize a constant-pressure type gas bearing with oppositely arranged air cushions, and realizes the polishing contact pressure compensation effect by utilizing a pressure balance function to the oppositely arranged air cushions. The self-adaption profile modification blade abrasive belt polishing machine tool has the advantages that the response speed of pressure compensation is increased, the self-adaption modification on the profile error (or waveness) during blade polishing machining is realized, and the profile precision is improved.

The invention relates to the field of electric energy metering, and discloses a method for collecting electric energy errors of an electric energy meter and a device thereof. In the invention, in a reactive load environment, the electric energy meter is collected by using high-accuracy and universal power values; and compared with the traditional pulse correction method, the correction requirements are reduced, the calibration process is simplified, the advantages of quickness, accuracy and convenience are highlighted, and an effect of carrying out single-point correction on the errors of the electric energy meter is achieved. If a phase angle is too big or too small, a situation that the value of a sine or cosine thereof is too big or too small is caused, therefore, the calculation accuracy can not be ensured. Through taking power values as data sources rather than direct and low-accuracy angles or derived parameters (such as power factors and the like) as data sources, a situation that the principle error of correction is low enough can be ensured. Through verification, the accuracy of correction on the electric energy meter can be further ensured. The testing time is only one third of the original testing time, thereby greatly saving the total collection time.

The invention discloses a method for identifying sampling points of a biological chip on the basis of the edge detection. The method comprises the following steps of: firstly, determining a real area of the sampling points by edge extraction, edge connection and area filling; then meshing by adopting a scanning method and automatically obtaining the row number, the column number and the total number; and finally corresponding area positions of the sampling points in each determined mesh to an original drawing, carrying out automatic searching to obtain the area and the mean value of gray scale of the sampling points in the original drawing, and comparing the area and the value of gray scale of the sampling points in the original drawing with corresponding parameters of the sampling pointsin the standard chip to obtain an automatic identification result of the sampling points. The method has high positioning accuracy. Software of the method is simpler to implement. The method has short time of an algorithm, is convenient and rapid to operate and makes full automation and intellectualization of information extraction of the biological chip possible.

The invention relates to a detection apparatus and method for the swing frequency error and swing zeroing error of a rotary table, belonging to the technical field of testing of inertial devices. According to the invention, magnetic steel is fixedly mounted on a detected rotation frame or side end face of the rotary table; a Hall sensor and a processing circuit are fixedly arranged on an immovable foundation; once the magnetic steel faces an induction surface of the Hall sensor, a TTL level induction signal is generated; a rotary-table calibrating device acquires TTL level induction signals and calculates the cycle length of adjacent TTL level induction signals so as to obtain the error of the swing frequency of the rotary table; a digital level meter is arranged on the reference surface of the detected frame of the rotary table; a photoelectric autocollimator collimates the center of a reflective mirror on the rotary table; and the digital level meter and the photoelectric autocollimator test the states of the rotary table before and after swing test and then data processing is carried out so as to obtain the swing zeroing error. The detection apparatus and method provided by the invention can detect the swing frequency errors and swing zeroing errors of rotary tables of different types, and has the characteristics of good applicability, high accuracy, convenience and rapidness.

The invention relates to a multi-shaft high-speed numerically controlled lathe. The multi-shaft high-speed numerically controlled lathe comprises a slant bed lathe body which is provided with a main machine and a slant bed body assembly. A four-station electric tool carrier and a lathe spindle are mounted on the slant bed body assembly, wherein an additional machining shaft system assembly which is arranged perpendicular to the lathe spindle is further mounted on a spindle box; a second fixed seat is arranged on the lateral side of the slant bed body assembly on the main machine; and an auxiliary centering assembly opposite to the lathe spindle is mounted above the second fixed seat. According to the multi-shaft high-speed numerically controlled lathe provided by the invention, a machining shaft is additionally arranged; on the basis of the original machining shaft which machines an excircle, the additionally arranged machining shaft can perform operations such as chamfering and groove milling simultaneously, so that the production efficiency and the machining precision are greatly improved; the auxiliary centering assembly is a three-finger pneumatic finger, and a guide rail and sliding tables are arranged at the bottom of the three-finger pneumatic finger, so that a cantilever of the centering assembly can be prevented from being overlong, and the stability of the centering assembly is greatly improved.

The invention provides a multi-type high-precision planetary roller lead screw pair precision detection device which comprises a grating ruler, a reading head, a slider, a linear guide rail, a nut sleeve, a punch molding device, a display screen and the like. The two-way positioning handle of the punch molding device is connected with a three-jaw chuck through a rotating shaft, and the three-jaw chuck clamps a lead screw for synchronous rotary motion. One end of a nut sleeve guide rod is fixedly connected with a connection plate, and the other end is fixedly connected with the nut sleeve. Both ends of the connection plate are fixedly connected with the slider and the reading head. The reading head horizontally slides on the grating ruler. The slider slides horizontally on the linear guide rail. The nut position information acquired by the reading head is displayed on the display screen during the straight nut movement. The device provided by the invention can test the return error, the two-way lead precision and the like of a planetary roller lead screw pair, has the advantages of high test precision and simple operation, and is suitable for the test of multiple types of planetary roller lead screw pairs. A reliable method is provided for the precision test of the planetary roller lead screw pair.

The present invention relates to a single-phase power transformer, which belongs to the technical field of an electric energy measurement and a mutual inductor. The device comprises an once terminal, a high pressure sensing head module, an insulator and a basal seat; wherein, the high pressure sensing head module is connected with a high pressure generatrix through the once terminal; optical fibers are buried in the inductor; the optical fibers in the inductor and the optical fibers in the basal seat are connected with a optical cable through an optical fiber terminal; the high pressure sensing head module is fixed on the top end of the insulator; the output end of the insulator is connected with the optical fiber in the insulator. The present invention can increase the accuracy of an electric energy measuring system to the most extent.

The invention relates to a method used for paper chart correction. The method is characterized in that the method comprises the following steps that excursions and rotation errors generated during the placement of a chart are corrected by two calibrated points; deformation errors of the paper chat are corrected by three calibrated points. According to the method, a distortional paper chart coordinate system or a coordinate system out of position in placing can form mapping with a coordinate system of actual placement, and when plotting a position coordinate of a plotting light dot or a paper chart pick point, through mapping transformation, the light dot plotting indication precision and the coordinate pick precision can be improved; through the selection of two position points, two sets of theoretical position coordinates and actual position coordinates are obtained, and the rotation errors and moving errors generated by placing the paper chart are achieved; through the selection of three position points, three sets of theoretical position coordinates and actual position coordinates are obtained, and the rotation errors, the moving errors and the deformation errors of the paper chart are completed.

The invention relates to the technical field of cable cutting, in particular to cable cutting equipment. The equipment comprises a control device, two sets of material reeling devices and a cutting device arranged between the two sets of material reeling devices; the control device is electrically connected with the material reeling devices and the cutting device; each material reeling device comprises a reel receiving and discharging mechanism for rotary discharging or receiving of reeled materials, a reeled material positioning mechanism for placing the reeled materials and facilitating thereel receiving and discharging mechanism, and a Y-axis moving component for driving the reel receiving and discharging mechanism and the reeled material positioning mechanism to move in the Y-axis direction; each reel receiving and discharging mechanism comprises a Z-axis moving component and a reeled material rotating component which can move in the Z-axis direction through the Z-axis moving component; the Z-axis moving components are mounted on the Y-axis moving components and can move in the Y-axis direction; each reeled material positioning mechanism comprises two sets of reel positioningcomponents; and the two sets of reel positioning components are connected with the Y-axis moving components correspondingly. Cables can be cut conveniently through the equipment, and the cutting precision and efficiency are improved.

The invention relates to an oil field steam injection boiler steam dryness measurement method and its system. The measurement method employs a process 1 and a process 2 alternately. The process 1 includes: measuring a conductivity value a by a first conductivity sensor (6), then conducting commutation, measuring a conductivity value b by the first conductivity sensor (6), and calculating a dryness value by a programmable logic controller (8). The process 2 includes: measuring a conductivity value c by a second conductivity sensor (7), then conducting commutation, measuring a conductivity value d by the second conductivity sensor (7), and calculating the dryness value by the programmable logic controller (8). The oil field steam injection boiler steam dryness measurement method and its system provided in the invention improve the accuracy and stability of oil field steam injection boiler steam dryness measurement, and reduce the use cost.

The invention relates to an on-orbit correction and deformation evaluation method for a phased-array antenna. The method comprises the following steps: firstly, carrying out ground structure and amplitude-phase measurement on an integrated link of a beacon, an array plane and a channel of the active phased-array antenna; then obtaining on-orbit compensation phases of all channels through calculation on the basis of ground amplitude-phase measurement data, and on-orbit correction of the electrical performance of the phased-array antenna is completed; secondly, according to the phase change value of each channel, obtaining the physical deformation length from the array antenna beacon to the position of each array plane unit; comparing and calculating with the measured data of the ground structure of the array antenna, and predicting the possible position coordinates of each unit of the array plane after in-orbit deformation; and finally, attributing the array surface deformation on-orbit evaluation to the optimization problem of the array surface unit position, constructing a deformation optimization model and optimization constraint conditions to update the array element position, solving the final array element position coordinate on the basis of multiple iterative optimization, and realizing the on-orbit profile change evaluation.

A cold quantity distribution system and method based on flow temperature difference proportion relates to a cold quantity distribution system and method, solving the defects of a current cold quantity metering method and having advantages of accurate and reliable metering result. The method comprises the following steps: a balance valve with a flow measuring function is arranged at front of each tail-end fan coil unit and is used for system hydraulic power balancing regulation and measuring flow through the fan coil unit; a cold quantity meter is arranged at a cold source outlet or an overall main branch; and supply/return water temperature sensors are respectively arranged on user-tail end inlet/outlet pipes and used for transmitting supply/return water temperature and system overall cold supply quantity to a calculator or a data center in a wired or wireless manner for completing cold quantity calculation and distribution operation. The system and the method, provided by the invention, are suitable for an air-conditioning system capable of regulating tail-end speed through make-and-break regulation, three-gear variable-speed regulation and infinitely variable speed regulation, and also suitable for an air-conditioning system capable of regulating the tail-end wind speed through the combination of make-and-break regulation and stepless speed regulation.

The invention discloses a porous medium adsorption and diffusion dynamic self-test experiment system and method. The system comprises a diffusion gas constant-temperature storage system, a data high-frequency automatic acquisition system, a pressure difference automatic leveling system and a gas constant-temperature adsorption system. The liquid level of the water storage column and the liquid level of the gas collection column are flush through the differential pressure automatic leveling system, and systematic errors caused by gas pressure changes are avoided; and a diffusion gas constant-temperature storage system and a gas constant-temperature adsorption system are utilized to solve systematic errors caused by gas temperature changes. The data high-frequency automatic acquisition system acquires data information through ultrasonic reflection, and high-frequency and high-accuracy reading can be achieved. And the total volume of gas diffusion and the gas adsorption capacity of the porous medium are calculated through computer programming, and dynamic visual display of experimental data is realized, so that the working efficiency of scientific research is improved. The whole experiment system is high in automation degree, errors caused by manual operation are reduced to a great extent, and meanwhile a large amount of time is saved for researchers.

The invention provides a power distribution line high-frequency transient characteristic signal generation device and a control method thereof, and the method comprises the steps: a multifunctional mutual inductor collection verification measurement and control communication device converts a received fault characteristic signal file into a current fault simulation signal and a voltage fault simulation signal; a gear control instruction is sent to the program control load box assembly according to the load requirement of a built-in mutual inductor of the tested equipment; an integrated high-voltage voltage and current generation assembly generates a current primary signal and a voltage primary signal according to the current fault simulation signal and the voltage fault simulation signal; and a program-controlled load box assembly adjusts the working gear of the program-controlled load box assembly according to the gear control instruction, so that the program-controlled load box assembly provides an external load for the secondary output of the tested equipment. The high-frequency transient characteristic signal output by the scheme can meet the requirement of power distribution automation equipment for carrying out a small-current grounding fault identification function test.

The invention discloses a fabricated electronic plant side span structure and a construction method thereof. The fabricated electronic plant side span structure comprises a plurality of first prefabricated PC columns, a plurality of second prefabricated PC columns, longitudinal prefabricated rectangular PC beams, transverse prefabricated rectangular PC beams, first prefabricated Z-shaped PC beamsand second prefabricated Z-shaped PC beams. The construction method comprises the steps that first, the longitudinal prefabricated rectangular PC beams are hoisted; second, the first prefabricated PCcolumns and the second prefabricated PC columns are hoisted; third, the transverse prefabricated rectangular PC beams are hoisted; fourth, the first prefabricated Z-shaped PC beams and the second prefabricated Z-shaped PC beams are hoisted; fifth, prefabricated laminated boards are laid; sixth, first prefabricated H-shaped PC beams and second prefabricated H-shaped PC beams are hoisted; seventh, prefabricated lattice beams are hoisted; and eighth, first connection joints and second connection joints are constructed. According to the construction method, the stability of the fabricated electronic plant side span structure is improved, the construction quality of the fabricated electronic plant side span structure is ensured, and the plant construction speed of a fabricated electronic plantis increased.

The invention discloses a self-adaptive transmission link intelligent joint equalization device, and belongs to the technical field of self-adaptive code modulation, transmission link equalization andthe like. The system comprises a demodulation module, a first-stage intelligent equalization module and a second-stage intelligent equalization module, each of the first-stage intelligent equalization module and the second-stage intelligent equalization module comprises a feedforward filter and a feedback filter, wherein the demodulation module is used for carrying out clock and carrier recoveryon a high-order modulation signal inserted with a prior pilot frequency; the first-stage intelligent equalization module and the second-stage intelligent equalization module adaptively update tap coefficients of the feed-forward filter and the feedback filter in the modules respectively; and finally, the second-stage intelligent equalization module filters the demodulated data frame output by thedemodulation module according to the equalized tap coefficient to obtain filtered payload part data. According to the invention, the tap coefficient of the filter can be adaptively adjusted, and rapidand effective equalization of data is realized.

The invention provides an automatic suburb village ternary structure extraction method based on a DMSP night light image. The method comprises the following steps: acquiring first noctilucent lamp data, water body data and fire point data; performing grid multiplication and mask erasing on the first noctilucent lamp data to obtain second noctilucent lamp data; cutting the second noctilucent lamp data to obtain first target area noctilucent lamp data; obtaining a quantile curve according to the first target area noctilucent lamp data, and respectively calculating first, second and third gradingthresholds according to the maximum value of the distance from the quantile curve to the reference line; and respectively carrying out grid re-classification on the first, second and third target areas by utilizing the first, second and third grading thresholds to classify the first, second and third target areas into cities, suburbs, villages and others. According to the method, automatic quantile curve analysis is carried out on the basis of the DMSP night light image, extraction of a suburb village ternary internal fine structure can be achieved, the threshold value is automatically selected from DMSP night light brightness distribution, and errors caused by introduction of auxiliary data and subjective factors are avoided.

The invention discloses a method for detecting the flatness of a 3D printed powder laying surface, and belongs to the technical field of 3D printing. The method is used for solving the problems that initial precision of the flatness of the powder laying surface of 3D printing equipment is low in adjusting efficiency and inaccurate. The method comprises the steps of selecting a to-be-printed product, setting a printing path, setting a data acquisition point path, collecting data, processing the data, judging the flatness of the powder laying surface and the like. Through the method, the production preparation time is greatly shortened; the adjusting precision of the powder laying flatness can be controlled within the range of 0.05 mm, and the precision is improved by dozens of times compared with manual adjustment, so that precise printing of the product and high precision of the equipment are achieved; and the production efficiency is improved, and the production cost is reduced.