87results about How to "Fewer measurement steps" patented technology

The present invention discloses a composition method of a gantry four-dimensional automatic measurement platform for detecting photochromic performance of display screens and a gantry four-dimensional automatic measurement platform using the method. The present invention relates to the automatic measuring technology of the photochromic performance of display screens, and comprises a platform base, a gantry frame, an X-axis moving mechanism, a Y-axis moving mechanism, a Z-axis lifting mechanism, and a display screen-carrying rotating platform. By moving the mechanisms to control the circuit, the four-dimensional automatic measurement platform for detecting photochromic performance of display screens is flexibly controlled to accomplish the three-dimensional move of the photochromic measuring instrument and the accurate one-dimensional rotation of the display screen to be measured, the present invention is characterized in stable movement of the photochromic measuring instrument, small rotation radium of the display screen, novel structure, small driving power needed, small size, light weight, low cost, rapid measuring speed, high reliability and so on. The present invention can be widely applied to the photochromic automatic detecting system of LCD or LED television screen, display screen, or mobile phone screen and so on, and the present invention can precisely adjust the coordinate position of the test points and the angle of the display screen intelligently according to the detecting requirement of photochromic performance of the display screens under the computer management, and rapidly accomplish the detection of photochromic performance.

The invention provides a simulation method for residual stress prediction of micro-milling nickel-based superalloy, belongs to the field of finite element simulation cutting, and relates to a finite element simulation method for residual stress prediction analysis in the cutting processing process of difficult-to-process materials of the nickel-based superalloy. According to the simulation method, the finite element simulation method is used; the elastic-plastic constitutive relationship of materials is considered; and a Johnson-Cook fracture failure criterion is used for judging the failure, so that residual stress prediction values under different cutting parameters can be obtained. A micro-milling cutter for experiments is shot into a picture through a scanning electron microscope; the picture is drawn into a micro-milling cutter solid model through software; a three-dimensional processed workpiece model is built; and the model is subjected to lattice division. The method has the advantages that the surface residual stress can be measured, and the residual stress in the depth direction can also be measured, so that the problem of measurement difficulty of the residual stress in the depth direction in the measurement process is solved. The cost is reduced, and the labor is saved. In a prediction model, the cutting parameters are variable; and the prediction on the surface residual stress of the difficult-to-process materials is effectively realized.

The invention discloses a crystal grain size ultrasonic non-destructive evaluation method without thickness measurement. The method comprises the following steps: carrying out data acquisition on a reference test block and carrying out pretreatment by adopting a signal averaging technology; constructing and calculating a decaying speed coefficient and an average decaying speed coefficient; establishing crystal grain size ultrasonic evaluation models with different thickness measured values; and carrying out crystal grain size evaluation on the test block with unknown crystal grain size. According to the method, the thickness does not need to be measured so that inconvenience on the thickness measurement of a tested object and the influence on the subsequent average crystal grain size, caused by inaccurate measurement, are avoided; the anti-interference capability of the method is effectively improved by a pretreatment means; the evaluation results of two tested test blocks with the average crystal grain sizes being 87.7 microns and 103.5 microns respectively, measured by a metallographic method, are 84.9 microns and 98.9 microns respectively; and errors can be controlled to be +/-5%. Visibly, the method disclosed by the invention provides a means that is not influenced by the thickness and can be used for effectively evaluating the crystal grain size of metal materials.

The invention discloses a rapid in-plane deformation measurement system and a measurement method based on space phase shift. The measurement system is characterized by consisting of a laser, a beam splitter prism group, a convex lens, a reflector, a beam expander, a carrier optical fiber fine tuning device, a lens imaging device and a CCD (Charge Couple Device) camera collecting device. According to the rapid in-plane deformation measurement system and the measurement method based on space phase shift, the oblique angle of an optical fiber irradiating a CCD array is changed and the space directions are different, the separation of a low frequency carrier and a high frequency speckle is realized, a low frequency item is extracted by Fourier transformation, inverse Fourier transformation is performed on the low frequency item, the phase distribution of an interference wave face representing the object in-plane deformation is obtained, and the real in-plane deformation of an object to be measured is obtained by the subtraction of phase position images before and after loading. The aim of rapid phase position detection is realized by only using a single image in a speckle interference material, the system is simplified, the cost is reduced, and the dynamic high-speed nondestructive measurement of the in-plane deformation is realized.

The invention discloses a fiber-optic gyroscope based angular displacement measuring device and method. The fiber-optic gyroscope based angular displacement measuring device comprises a fiber-optic gyroscope and an operation processing unit which are connected with each other. The fiber-optic gyroscope based angular displacement measuring method comprises the following steps of: (1) fixing the fiber-optic gyroscope on a rotary device to be measured, and enabling a measuring axis of the fiber-optic gyroscope to be parallel to a rotation axis of the rotary device to be measured; (2) enabling the operation processing unit to receive output values of the fiber-optic gyroscope and calculate the mean value of output values within test time when the rotary device to be measured is on the static state; (3) enabling the rotary device to be measured to rotate an angle, wherein output values of the fiber-optic gyroscope are continuously recorded by the operation processing unit in the rotation process; and (4) obtaining the angular displacement of the rotary device to be measured, which is caused by rotation, through the calculation carried out by the operation processing unit according to the scale factor of the fiber-optic gyroscope, the mean value of the output values obtained in the step (2), and various output values of the fiber-optic gyroscope obtained in the step (3). The device and the method, which are disclosed by the invention, have the advantages of strong test adaptability, simple structure and high measurement precision.

The invention discloses multi-modality imaging equipment combining opto-acoustic imaging and laser speckle imaging. The multi-modality imaging equipment combining opto-acoustic imaging and laser speckle imaging comprises a 532nm pulse laser source, a 632.8nm He-Ne laser source, an opto-acoustic modulating light path, a laser speckle modulating light path, a reflector group, an opto-acoustic signalacquiring system, a laser speckle blood flow acquiring system and an upper computer. The multi-modality imaging equipment combining opto-acoustic imaging and laser speckle imaging disclosed by the invention can detect haemodynamics parameters including cellular structures in blood vessels, blood flow and the like continuously and simultaneously in a real-time same-view-field manner, and effectively and accurately transmit the acquired multi-modality parameters to the upper computer for processing; and besides, the composition of the multi-modality imaging equipment can be simplified, and high-distinguishability opto-acoustic imaging and laser speckle blood flow imaging are effectively combined, so that the measuring steps and the measuring time of different parameters are greatly reduced,and strong support is provided for clinical diagnosis and treatment of vascular diseases in future.

The invention discloses a single image rapid phase displacement system and method based on deflection angles. The system and method are characterized in that object light emitted by a laser device irradiates an object surface to be detected to form laser speckle interference, and return object light from the object surface to be detected irradiates a target surface array of a CCD camera; reference light emitted by the laser device irradiates the target surface array of the CCD camera at an angle alpha through a collimation component and a reflector, and generates a laser interference phenomenon on the target surface array of the CCD camera together with return object light, the angle alpha is adjusted, a 120-degree optical path difference exists between reference light of two adjacent pixel points, and the phase value of the laser interference phenomenon is calculated according to the numerical values of three adjacent pixel points in information recorded by the CCD camera. By means of the single image rapid phase displacement system and method, only a single image is used in speckle interference so that rapid phase detection can be achieved, and a PZT displacement micro-movement system required by the time phase displacement method does not need to be used.

The invention discloses a silt underwater repose angle measurement method. The silt underwater repose angle measurement method comprises the steps of adding silt on a circular truncated cone in a detection container through a funnel and forming a sand pile underwater, wherein the radius of the circular truncated cone is measured in advance. The silt underwater repose angle measurement method is characterized in that according to the theory of communicating vessels, height measurement is converted into water level measurement, that is, the liquid level is controlled to gradually drop to be flush with the top of the sand pile by controlling a water injection container communicated with the bottom of the detection container, the height of the sand pile is obtained by detecting the height of the water level from above the water surface, and then calculation is conducted to obtain a silt underwater repose angle. The method has the advantages that the adopted devices are simple in structure, the measurement accuracy is high, the fault tolerance is good, operation is easy and convenient, and control is convenient.

The invention provides a one-time splicing measurement device of a large-aperture optical element profile, relating to a measurement device of an optical element profile. The one-time splicing measurement device is provided with a Y-axis linear motor, Y-axis linear guide rails, a base, a movement controller, a stand column, a cross beam, a measurement sensor, a linear motion lead screw nut pair, a coupling, a measuring head movement driving motor, Z-axis linear guide rails, a Z-axis linear motor, a measuring head connecting base, a Z-axis workbench, an X-axis workbench, X-axis linear guide rails, an X-axis linear motor, a workpiece, a workpiece rotary table, a connecting base, a rotary motor, a Y-axis workbench and a computer. The one-time splicing measurement device can realize one-time splicing measurement; particularly specific to a large-aperture workpiece, measurement steps are reduced by adopting the measurement device; the one-time splicing measurement device is simple in measurement process, high in measurement efficiency, simple and compact in structure and convenient to operate.

The invention discloses a device for detecting powder amount of a campaign bomb. The device comprises a measuring device and a waste removing device, wherein the measuring device comprises a linear displacement sensor and a powder detecting punch which is connected with the linear displacement sensor and can move up and down; the linear displacement sensor is in communication connection with a controller; the waste removing device comprises a waste removing punch connected with a push-pop arm of a campaign bomb production machine tool, a direct-acting electromagnet in communication connection with the controller, a waste removing siding plate connected with the direct-acting electromagnet, a waste removing plate which is arranged below the waste removing sliding plate and corresponds to the waste removing sliding plate in position; the direct-driving electromagnet can drive the waste removing sliding plate to perform a reciprocating motion; the waste removing plate is provided with a hole through which a cartridge case can fall. Through the technical scheme, according to the device for detecting the powder amount of the campaign bomb provided by the invention, a measured depth signal of the powder amount is fed back to the controller through measurement of the linear displacement sensor, so that the measuring step of an electric gauge in the prior art is eliminated, the detection time of the powder amount is shortened to a certain extent, and the production efficiency is improved.

The invention provides a method for detecting an imaging position error of laser direct imaging equipment. The method comprises the following steps: inputting a stitching error detection graph into the laser direct imaging equipment; carrying out imaging on a substrate covered with a photosensitive dry film through a spatial light modulator; respectively grabbing center coordinates at two sides of the graph stitching position through a charge coupled device (CCD) image processing system of the laser direct imaging equipment; and calculating the error between the coordinates at two sides in X and Y directions, wherein the error is the stitching error. According to the method, the chemical development and microscope measurement steps are omitted; and the detection efficiency and accuracy are greatly improved.

The invention discloses a system and method for measuring a soil moisture characteristic curve by using a centrifuge method. The system includes a centrifuge, a centrifuge tube, a catchment cylinder, a magnetostriction ruler, a balance cylinder and a baffle. The centrifuge is used for centrifuging drainage on a soil sample at a set speed; the centrifuge tube is used for containing the soil sample to be tested; the catchment cylinder is arranged at the bottom of the centrifuge tube, and is a closed hollow structure used to collect water in the soil sample; the magnetostriction ruler is in installed on the cover of the centrifuge tube, and is used for measuring the expansion and contraction quantity of the soil sample; and the balance cylinder is used to ensure the balance of the centrifuge disc. According to the centrifugal speed, compression of the soil sample and displacement, the characteristic curve of the soil sample can be calculated; and after each measurement, water does not need to be poured, weighed or balanced again, so as to greatly save the workload and procedures of measurement. At the same time, the unit weight is calculated according to the compression amount of the soil sample, and the moisture content of soil sample is amended; therefore, the results are more accurate.

The invention relates to a mounting clearance measuring device of a reactor coolant pump thrust plate. An upper pressure plate (3) is mounted on a tool shaft (4); a bolt (1) is assembled with a threaded hole formed below the tool shaft (4) through a lower pressure plate (2); and a thrust plate (7.2) is installed between the upper pressure plate (3) and the lower pressure plate (2). An axial clearance plate (5) is installed above the tool shaft (4) by hexagon head screws (6). A lifting lug is installed in the threaded hole above the tool shaft (4). A dial indicator is mounted on the plane of the axial clearance plate (5). Therefore, the clearance between the thrust plate and the main thrust tile can be measured quickly and accurately. The time spent in the whole process is reduced; the controllability is high; the manpower is reduced; the operation becomes simple; and the device is convenient to mount or dismount. The device is manufactured conveniently; and the cost is saved.

The invention discloses a high-temperature air disturbance filtering method based on structural light projection and digital image correlation. A high-temperature air disturbance detection system based on structured light projection and digital image correlation, in each stage of measurement, performs structured light projection and monochromatic light projection on an object to be measured by using a structured light projector, acquires grayscale images, performs Fourier analysis on two grayscale image sequences, determines whether the low-frequency term in the Fourier spectrum of the planarstructure light grayscale image is a heat flow disturbance confidence probability and filters out the same, obtains morphologic information and out-of-plane deformation information by Fourier profile profilometry; filters out the heat flow disturbance of the spectrum of the monochromatic light illumination image by using the confidence probability, and then performs inverse Fourier transform anddigital image correlation operation to obtain in-plane deformation information with the heat flow disturbance filtered out. The method can meet the requirements of modern metering for high temperature, high speed and high precision, and reduce the influence of air disturbance under high-temperature measurement environment.

The invention provides a detection method of figure splicing errors of a laser direct imaging device. The method includes the following steps that: splicing detection figures are inputted to the laser direct imaging device; a substrate is installed and commissioned; exposure imaging is performed on the substrate; a CCD image processing system captures the coordinates of the center of the circle at the left side; the CCD image processing system captures the coordinates of the center of the circle at the right side; and a splicing error value can be obtained. According to the detection method of the invention, a spatial light modulator directly images a laser beam on the substrate coated with a light sensing dry film; the CCD image processing system of the laser direct imaging device is utilized to capture the coordinates of the centers of the circles at two sides of a figure splicing position; and the error of the coordinates at the two sides in an X direction and a Y direction is calculated, and the error is a splicing error. According to the method, a chemical development step and a microscopic measurement step are omitted, and therefore, detection efficiency and accuracy can be greatly improved.

The invention relates to the field of radiation protection, and provides an animal organ radiation dose evaluation method for a particle external irradiation experiment. The method comprises the steps of obtaining an organ dose conversion factor by utilizing an experimental animal digital model and particle transportation simulation calculation, and then measuring air kerma kinetic energy to perform organ radiation dose evaluation. The problem that the organ dose is difficult to directly measure is solved, and the technical effect of improving organ dose evaluation convenience and accuracy is achieved.

The invention discloses a method and a device for determining acetic acid content in acetate cuprammonia. The determining method comprises the following steps: 1) adding sulfuric acid solution in a distillation container filled with diluted acetate cuprammonia; 2) heating and distilling the distillation container to obtain distillation solution; 3) adding a phenolphthalein indicator in the distillation container, and using sodium hydroxide standard solution for titration until the color of the distillation solution is pink; and 4) calculating the acetic acid content. The determining device comprises a heating unit used for heating the distillation container, the distillation container, a condenser pipe and a receiver, wherein the distillation container is communicated with the condenser pipe through a bend pipe, and the lower end of the condenser pipe stretches into the receiver. According to the acetic acid determining method, the operation steps are simple, and the determining result is accurate. According to the determining device, only one heating device is needed, the operation steps are reduced, and the determining cost is lowered.

The invention discloses an accurate shearing device used for hotel furniture machining. The accurate shearing device used for hotel furniture machining comprises a graduated scale, wherein the graduated scale is sleeved with a moving sleeve and a location sleeve; first limit blocks are arranged at the two ends of the graduated scale; a slide rod is arranged at one side of the graduated scale; thegraduated scale and the slide rod are arranged in parallel; the slide rod is sleeved with a slide sleeve; second limit blocks are arranged at the two ends of the slide rod; the second limit blocks arefixedly connected with the first limit blocks; one side of the slide sleeve is connected with the moving sleeve through a connection block, and a connection rod is arranged at the other side of the slide sleeve; shears are arranged at one end away from the slide sleeve, of the connection rod; and a rotary shaft on the shears is fixedly connected with the connection rod. According to the accurateshearing device, the graduated scale is arranged at one side of the shears, excessive shearing of the shears is prevented, the shearing accuracy is improved, the steps of leather and fabric measurement can be reduced, and practical functions are achieved.