377results about How to "Simplify the measurement steps" patented technology

The invention discloses a method and device for quickly detecting the area of a leaf blade based on a mobile phone. The method comprises the following steps of: selecting a pure-color opaque flat plate of which the color of a front face is different from that of the leaf blade under test as a background plate, wherein the area of the background plate is greater than that of the leaf blade; fixing a reference object with an area of SR on the front face of the background plate, wherein the color of the reference object is different from those of the background plate and the leaf blade under test; placing the leaf blade under test on the front face of the background plate and acquiring a digital picture through image pickup of the mobile phone; performing graying, filtration, geometrical correction, binarization and region connected label processing on the picture to divide the picture into three regions, namely a background region, a reference object region and a region of the leaf blade under test; traversing picture data to obtain total number of pixels of the background plate, the reference object and the leaf blade under test; and finally, automatically calculating the area of the leaf blade under test by the mobile phone according to a formula through the total number of the pixels of the reference object and the leaf blade under test and the area of the reference object given by a user. Through the method and the device, the measuring steps are simplified, the detection time is shortened, and the measurement accuracy is improved.

The invention discloses a method for detecting micro deformation of a transformer winding, which comprises the following steps: a pulse signal with a frequency higher than 1KHz is input into a transformer and the signals of an input terminal and an output terminal of the transformer are acquired by a sensor, after the signals acquired are processed, the transmission functions of the output terminal and the input terminal are computed, a correlation coefficient is computed by utilizing the transmission functions computed and a transmission function prior to the initial use of the transformer, if the correlation coefficient is judged to be smaller than the threshold value, an alarm signal of winding deformation is sent; and if the correlation coefficient is judged to be bigger than or equal to the threshold value, the acquired signals are processed and then saved into a database. The method for detecting micro deformation of transformer winding has simple measuring procedure, is easy to realize, can adjust measure precision on transformer deformation by adjusting the threshold value of the correlation coefficient and overcome the technology difficulty of deformation detection of the transformer for long time, and is easy to popularize.

The invention discloses a mechanical type multipoint extensometer, which comprises an orifice reading machine, an orifice reference plate, an indium wire, and an anchoring head for point measurement inside a pore. The orifice reference plate is fixed on the pore wall with an expansion bolt, a pilot pin at the bottom plate of the orifice reading machine is inserted into the locating hole in the orifice reference plate, the orifice reading machine is fixed in the orifice reference plate, one end of the indium wire is fixed on a fastening bolt of anchoring head for point measurement inside a pore, the other end of the indium wire is fixed passed through a center hole of the orifice reference plate and fixed on a conical clip with point measurement marks, and the conical clip with point measurement marks is connected with a conical hanger of the orifice reading machine. The invention has the advantages of simple structure, large measurement range, easy operation, rapid anchoring, and reliable performance; and is suitable for point measurement in a pore with different bore sizes.

The invention provides a wheel distance measuring method based on stereo vision and laser, which uses a stereo vision laser measuring system to obtain relative measuring parameters. The method uses a digit camera to shoot laser pattern projected on the tyre crown, uses image processing method to extract laser pattern target, uses stereo match algorism and three-dimension rebuild algorism to obtain laser pattern stereo point. And the invention projects the laser pattern stereo point on a simulated plane of the laser pattern, uses the projected point to generate a two-dimension curvature, to calculate out an extreme point of the two-dimension curvature, while the extreme point is relative to the tangential point of the tyre crown. And the invention uses one tangential point at inner tyre crown and at least three tangential points at outer tyre crown to simulate a tangential plane to calculate out the central plane of tyre. And the invention calculates out the distance between the cross lines of the central planes of left and right tyres on one shaft and the wheel support plane to obtain the vehicle wheel distance.

The invention discloses an ion beam automatic measuring system and method. Measurement probes for four parameters (beam intensity, emittance, energy divergence and monatomic ion ratio) of an ion beam are organically integrated in a vacuum chamber and are used for measuring beam intensity, emittance, energy divergence and monatomic ion ratio. The measurement probes for the four parameters are movable and are driven by a step motor, the operation of the step motor, and the acquisition and processing of measurement data are controlled by a computer. The invention has the advantages that all parameters of the ion beam can be measured under the state that an ion source stably operates without halting, assembly and disassembly procedures of all parameter measurement devices are reduced, damage to the ion source and the parameter measurement devices is reduced, and the convenience and the rapidness are achieved in a measurement process, and the influence of an environment factor is lowered, and the precision of parameter measurement is improved.

The invention provides a method for realizing a variable free lighting pupil based on a micro-reflector array. The method comprises the steps of measuring a light spot position, optimizing the light spot position, correcting the light spot position and the like, and specifically comprises the steps of measuring a position parameter of a reflected light spot through a CCD (charge coupled device) camera when each micro-reflector unit is static; substituting the parameters into a grid search ant colony algorithm for optimization to obtain a micro-reflector array rotation angle matrix for generating the shape of the required pupil; measuring a light spot position difference between the light intensity distribution and the required light intensity distribution on a target surface loaded with the rotation angle matrix, and correcting a micro-reflector array rotation angle obtained by optimization by taking the light spot position difference as a feedback to enable a result to finally meet a lighting requirement on the target surface. The method can realize various lighting modes including the non-circumferential symmetric complicated lighting pupil, is high in optimization speed, high in convergence and high in accuracy, and has high practicability.

The invention provides a method for measuring relay contact settling time and a device thereof, which can simultaneously measure six groups of changeover contacts and has a measurement resolution of 1mu s. The device comprises a relay under test, a load unit, a signal conditioning unit, a data acquisition unit, a bus, a main control unit, an FPGA logical time sequence unit, a human-computer interaction unit and a coil drive unit; wherein the relay under test is connected with the load unit; the load unit is connected with the signal conditioning unit which is connected with the data acquisition unit; the data acquisition unit is connected with the bus which is connected with the main control unit and the FPGA logical time sequence unit; the main control unit is respectively connected with the human-computer interaction unit, the FPGA logical time sequence unit and the coil drive unit; and the coil drive unit is connected with the relay under test. The invention has the advantages of high accuracy of measurement, automatic measurement process, simple measurement procedures, easy operation, small size and light weight of measuring devices, and the like.

A method for detecting isotropic material surface Young modulus by using surface acoustic wave technology. The method is as below: exciting broadband surface acoustic wave in an isotropic specimen surface to obtain a dispersion curve on a surface acoustic wave propagation direction; fitting the actual phase velocity data to obtain a closest truth-value phase velocity and a phase velocity fluctuation section; establishing a Cartesian coordinate geometry model to obtain a surface wave basic propagation equation containing unknown medium Young modulus, Poisson ratio, direction cosine of the propagation direction, amplitude attenuation coefficient given according to experience value, wave number and wave velocity; calculating assumption corresponding relation between wave velocity and wave number in the Cartesian coordinate geometry model and simultaneous theoretical relationship, to obtain mutual relationship of velocity, frequency and Young modulus under ideal conditions; and conducting reverse calculation to obtain the Young modulus in medium according to the mutual relationship of velocity, frequency and Young modulus under ideal conditions and the dispersion curve under actual conditions. The invention realizes effective measurement of isotropic material surface young modulus.

The invention relates to a pose measuring method based on coaxial circle characteristics of a target and belongs to the technical field of computer vision measurement. The pose measuring method is characterized in that the target is provided with coaxial circle characteristics, curve extraction and ellipse fitting technologies are combined to obtain two coaxial circular projection equations in an image, and circular point projection coordinates and vanishing line equation of a target plane are obtained by means of relation of absolute conic, vanishing line and circular points in projection geometry of the circle characteristics; by means of the polar line-pole theorem, circular center projection coordinates of two coaxial circles are obtained by the vanishing line equation of the plane, and pose and position information of the target is solved by taking the actual distance of the coaxial circles as prior condition and combining the projection of the circular points and the projection coordinates of the circular centers. The pose measuring method based on the coaxial circle characteristics of the target has the advantages that measuring of target pose is completed by means of a single target image of coaxial circle characteristics, so that the pose measuring method is simple to operate and applicable to measurement in real time. Meanwhile, without manual intervention, high-precision measurement is realized.

The invention discloses a method for measuring a gradient of a wind generating set tower, which comprises the following steps of firstly arranging a base on the lower part of a wind generating set tower drum, arranging a longitudinal shaft with an equivalent plane being parallel to the wind generating set tower drum on the base, determining the orientation of a laser beam which is vertical to the longitudinal shaft of the wind generating set tower drum by utilizing a right-angled plate and an inclined indicating instrument, arranging a theodolite in the direction pointed by the laser beam to observe the top and the bottom of the wind generating set drum, recording a corresponding direct telescope angle and a corresponding inverted telescope angle, to conveniently calculate the gradient of the wind generating set tower drum. Due to the adoption of the method, the error of the measured gradient value of the wind generating set tower drum is further reduced, the traditional method for measuring the gradient of a building by utilizing the theodolite is changed, and the gradient measurement steps are simplified.

The invention belongs to the technical field of intelligent automobile environmental perception and particularly relates to a calibration device based on laser radar and camera fusion as well as a calibration method thereof. The calibration device comprises a rack, a base plate, a turnplate, a calibration long rod, a calibration short rod, a screw, a gear shaft, a gear bearing, a gear, a bottom plate, a bottom plate steel ball, a limiting spring, a limiting steel ball, a turnplate shaft, a turnplate bearing and a spring locking mechanism. According to the calibration device based on laser radar and camera fusion as well as the calibration method thereof, which are provided by the invention, the calibration device is simple in structure, can be operated manually, can move and rotate in a two-dimensional plane and can calibrate the three-dimensional coordinates of a scanning point. The defect that the single sensor cannot acquire environmental information accurately and integrally is overcome, and a series of difficulties that the position of the scanning points is difficult to determine, the calibration process is tedious and the scanning points are discrete and discontinuous are overcome.

The invention provides a measuring device for the transverse spin relaxation time of alkali metal atoms, wherein the device includes a pumping optical path device, a detecting optical path device, anatomic gas chamber, a three-dimensional Helmholtz coil, a polarizing surface detection device and a signal processing system; the atomic gas chamber is filled with alkali metal atoms and buffer gas; the pumping optical path device includes a first laser, a first beam expanding collimating unit and a circular polarized light conversion device arranged in series successively; the detecting optical path device includes a second laser, a second beam expanding collimating unit and a first linear polarizer. The invention also discloses a measuring method for the transverse spin relaxation time of the alkali metal atoms. With application of the device and the method, the device and the method have the effects that the overall structure is simple; the rotating magnetic fields with different directions are used for accurate measurement of the transverse spin relaxation time of the alkali metal atoms having ground state with different superfine energy levels, and the device and the method can beapplied to study of optical pumping and spin relaxation, and evaluation of properties of atomic magnetometers, atomic spin gyroscopes and the like.

The invention relates to a measuring method of left and right eye brightness crosstalk values of a stereoscopic display device. The method comprises the following steps that: step 1, a test chart is displayed on a stereoscopic television or a stereoscopic display and is divided into two parts: a left image and a right image, wherein corresponding test units are respectively arranged in the left image and the right image as well as first areas and second areas are arranged in the test units; step two, a crosstalked image is used as a right image and a crosstalking image is used as a left image, so that a brightness crosstalk value from a left eye to a right eye is obtained; and step three, an input signal is changed as well as the crosstalked image is used as a left image and the crosstalking image is used as a right image, so that a brightness crosstalk value from a right eye to a left eye is obtained. According to the invention, beneficial effects are as follows: the measuring steps are simple; there is no need to change an input signal frequently; and because a brightness difference deduction method is employed, same interference factors can be counteracted during the calculation process, so that the requirement on the measuring environment during the measuring process is not strict.

The invention provides a pulse modulation signal phase noise measuring device. The pulse modulation signal phase noise measuring device comprises a down conversion and orthogonal phase discrimination arithmetic unit, wherein the down conversion and orthogonal phase discrimination arithmetic unit comprises a down conversion unit, an orthogonal phase discrimination unit and a sampling arithmetic unit, which are sequentially arranged from an input end to an output end, the down conversion unit comprises a local oscillator, a frequency mixer, a tunable band pass filter and a primary low noise amplification unit, the orthogonal phase discrimination unit comprises a phase discriminator, a low pass filter, a secondary low noise amplification unit, a loop filter and a reference source, the sampling arithmetic unit comprises an A / D (analog to digital) sampling unit and an analysis and arithmetic unit, and a phase noise measuring result is obtained after an output signal of the orthogonal phase discrimination unit passes through the A / D sampling unit and the analysis and arithmetic unit. The pulse modulation signal phase noise measuring device decreases numbers of needed test instruments and electric cables, simplifies measurement steps, and reduces test difficulty.

The invention provides a cell membrane specific capacitance detection system comprising a pair of intersect channels, wherein the first channel of the intersect channels is in the first direction, and the second channel is in the second direction intersecting with the first direction; when a cell is driven by a driver and travels a cell travel compressed channel through a cell inflow path, an impedance measuring module records the impedance changes between electrodes, and a cell electricity equivalent model can calculate so as to obtain the cell membrane specific capacitance. In addition, the invention also provides a cell membrane specific capacitance detection method; the detection system can effectively improve the cell membrane specific capacitance detection flux without using optics detection and image analysis, thus effectively reducing cost, simplifying operations, easily carrying out parallelization expansion, and further improving flux on the single channel basis.

The invention belongs to the technical field of measuring instrument production and measurement, in particular a complex revolving body contour measuring method and device capable of eliminating part positioning error. The device comprises a vertical guide rail system consisting of a first measuring head and a second measuring head including an emitter capable of emitting parallel lights and a receiver formed by a high-accuracy linear array CCD, a revolving workbench, a base, a vertical guide rail and a floating frame. A revolving body workpiece to be measured is arranged on the revolving workbench, the first measuring head and the second measuring head can move up and down along with the floating frame along the vertical guide rail and are symmetrically and radially distributed at both sides of the revolving body workpiece to be measured, and the measuring range of the measuring heads is larger than the radius variable of the revolving body component to be measured. When a complex revolving body is measured by the method and the device, the influence of the part positioning error can be effectively and automatically eliminated, and the contour size and error of the complex revolving body can be fast measured.

The invention discloses a system and a method for in-situ measurement of the wall thickness of a large thin-walled component. The system includes a numerical control machine tool, a tracer fixture, a measuring head bracket, a binocular structured light measurement device, an industrial computer, and a high-speed communication unit. The method is based on a binocular structured light measurement technology. Point cloud information is acquired according to the requirement on in-site detection of the overall 3D shape and wall thickness distribution of a thin-walled component in the machining process and based on a structured light precision measurement technology. The wall thickness at a corresponding position is acquired by selecting a measurement datum plane and performing differential operation gradually. Finally, the point cloud data measured at multiple positions is compared with a CAD model of the component and merged, and thus, in-situ detection of the large thin-walled component is completed, and accurate wall thickness data at each position is acquired. Precision measurement of a large thin-wall component is realized without contact. The system and the method can provide shape data for machining quality evaluation, and also can guide the machining process.

The invention relates to a method for measuring the attitude of a target space with parallel line features. Existing measuring methods have the problems of arrangement of cooperative marking points ona straight line, complicated measuring steps, complex measuring instrument and expensive device. The method comprises the following steps: 1) establishing a measurement system; 2) calibrating a linelaser plane equation; 3) calculating the spatial direction vector of a straight line of the line laser irradiated onto the surface of an object to be measured; 4) calculating the expression of a target space of the parallel line features pointing in a camera coordinate system; and 5) solving the attitude angle and the azimuth angle by the rotation transformation of the coordinate system. The method can directly use the parallel line features of the surface of the measured target object without arranging the cooperative marking points on the target, and allows the three-dimensional attitude information of the measured target object in the space to be obtained without an expensive three-dimensional coordinate measuring instrument, so the method has the advantages of convenience in arranginga measuring system, low cost, and simple measuring steps.

The invention relates to a device and method for monitoring physiological parameters, in particular to a non-medical wrist type physiological parameter monitoring device and a monitoring method thereof. The non-medical wrist type physiological parameter monitoring device comprises a power supply, a photoelectric detection module, a patch type temperature sensor, a signal amplification module, a signal filter module, an A / D (analog to digital) conversion module, a single-chip microcomputer, a display and a data storage. The non-medical wrist type physiological parameter monitoring device has the advantages that physiological parameters can be displayed non-invasively, comfortably and in real time, multiple physiological parameters can be measured on one device, measuring procedures are simplified greatly, measuring time is reduced, uncomfortableness of a user being measured is eliminated, no harm is caused to human bodies during monitoring, and accordingly the monitoring device can be used for long-term monitoring of physiological parameters. In addition, the monitoring device is small in size, portable, and provided with functions of alarming and data storage.

The invention discloses a measuring method of carbon, hydrogen and nitrogen contents in biomass fuel. The measuring method comprises the following steps of burning a sample to be measured, collecting mixed gas generated by burning, measuring and calculating full carbon, full hydrogen and full nitrogen percentage contents of the sample to be measured, and calculating the carbon, hydrogen and nitrogen contents in the biomass fuel to be measured. The method has the advantages that the measuring accuracy of the method is higher than that of an infrared-thermal conductance method of a coal sample, the measuring efficiency of the method is higher than the combined measuring efficiency of standard measuring methods, namely a semimicro Kelvin method and a three-section furnace method, and the method is applicable to quickly and efficiently measuring the carbon, hydrogen and nitrogen contents in the biomass fuel, can achieve high accuracy of measuring results and is low in implementation cost.

The invention relates to a measuring method for the dust fall quantity of a plant canopy leaf surface. The measuring method comprises the following steps: (1) selecting a well-grown plant, and picking 15-20 leaves from the upper, middle and lower parts of a plant canopy; (2) placing the healthy leaves picked from each plant in numbered envelopes, taking the envelopes to a lab, shearing the petioles of the leaves, and drying the leaves without the petioles in a drying box under the temperature being 105 DEG C; (3) weighing the leaves in the step (2) to obtain W1; (4) soaking the leaves after the weighing in the step (3) in distilled water for 20-30 minutes, so as to enable falling dust on the front surface of the leaves to be cleaned, after washing of the leaves by the distilled water, drying the washed leaves till the weight is constant, and weighing for the second time to obtain W2; (5) wetting the leaves in the step (4), and measuring the total leaf area S of each plant by a leaf area measuring instrument, wherein a computational formula of the dust fall quantity is as follows: FDC (g.m<-2>)=(W1-W2) / S*10000. The method is simple, easy to operate, and can be used for providing new indexes for air quality monitoring; by using the method, the breakthrough and the progress of research on influence of leaf surface dust fall on the plant can be realized.

The invention discloses a detection method for parallelism and coaxiality of flanges at two ends of a pylon, which comprises the following steps: the flange parallelism measuring function of a laser planometer is adopted to measure the parallelism; the parallelism between faces are switched to the parallelism between lines; the parallelism at horizontal positions of mutually perpendicular diameters of to-be-measured faces respectively; therefore, the coaxiality of the parallelism of two faces is obtained. The detection method is relatively simple, does not need to adjust the level, does not need to manufacture massive horizontal moulding beds so as to greatly save materials, does not need to occupy massive field specially for a special measuring field so as to greatly relieve the problem of the turnover of the field, allows the production process to be smoother, and improves the production efficiency.

The invention discloses an optical heterogeneity measurement device and method based on a dual wavelength fizeau interferometer. With the dual wavelength fizeau interferometer, interferograms of a reference light wave and a light wave reflected by the front surface of a to-be-tested flat mirror are sequentially collected, and wavefront aberration data [delta]W11(x,y) and [delta]W21(x,y) corresponding to wavelengths [Lambda]1 and [Lambda]2 are obtained by first phase shift measurement; interferograms of the reference light wave and a light wave passing through the to-be-tested flat mirror and reflected by the rear surface of the to-be-tested flat mirror are collected, and wavefront aberration data [delta]W12(x,y) and [delta]W22(x,y) corresponding to the wavelengths [Lambda]1 and [Lambda]2 are obtained by phase shift measurement; and a difference value is calculated by the wavefront aberration data corresponding to the wavelengths obtained by two-stepped measurement, and the optical heterogeneity of the to-be-tested flat mirror is obtained. The invention does not require a standard reflector, and completely eliminates influences of the surface shape of the standard reflector on measurement results. The measurement steps are simple, and the defects that the traditional absolute measurement method has tedious steps and is vulnerable to air disturbance are tackled.

The invention relates to a chemical test method for earth and crop nutrient. It includes the following steps: earth sample gathering and processing, rapid testing earth alkali-hydrolyzable nitrogen, rapidly available phosphorus, and rapidly available potassium, gaining the tested liquid of earth or crop and dropping into the two holes in dropping board, comparing the standard color gradation and calculating rapid test value by regression equation. The advantages of the invention are easy to operate, rapid, certain accuracy, and convenient to carry, etc.

The present invention relates to a probe observation device and a surface property measurement device. The probe observation device and surface characteristic measurement device include: a camera (230) for photographing the probe (210), an image processing unit (330) for image processing the image data obtained by the camera (230), (330) A monitor (400) for displaying image data subjected to image processing, and a mouse (500) for commanding input of image processing contents by manual operation. The image processing unit (330) includes an image data processing unit (350) that processes image data according to a command input from a mouse. The camera (230) has a low magnification lens system, and is set in a state where the relative position of the probe (210) is fixed when the probe (210) enters the field of view.

An optical acoustic thunder and lightning detecting process and a detector. The method comprises following steps: setting an optical acoustic thunder and lightning detector to make a lens of an image collector of the optical acoustic thunder and lightning detector face to the sky and the lens light axis of the image collector vertical to the horizontal plane; collecting the image with thunder and lightning image with the image collector, displaying on the image collector; detecting the azimuth of the thunder and lightning from the image based on the position of the thunder and lightning in the image. The detector can detect the distance and orientation of the thunder and lightning in the detecting visual range, acquire the image of the thunder and lightning and acquire the thundering sound by the sound collector with high detecting and positioning accuracy. The detecting steps are simple, detecting result is accurate and the thunder and lightning positioning problem is solves with low costs.

The invention provides a fine-particle sediment underwater repose angle measuring device and a measuring method of the fine-particle sediment underwater repose angle measuring device. The fine-particle sediment underwater repose angle measuring device comprises a glass water tank, a floating plate, a funnel, a transparent testing circular platform and a plastic rod. Leveling knobs are installed on the outer side of the bottom of the glass water tank, rulers are engraved on the portions, with the same height, of four side walls, and two water pipes are symmetrically installed in the middles of the bottoms of a pair of side walls respectively; the floating plate is arranged in the glass water tank, a hole is formed in the middle of the floating plate, the funnel is fixedly arranged in the hole, and the floating plate and the funnel are combined into a whole; flat-pressing holes are symmetrically formed in the wall of the portion, below the floating plate, of the funnel; the transparent testing circular platform is fixed to the middle of the bottom of the glass water tank and is used for bearing a sediment sample leaking from the funnel; a leveling bubble is arranged in the center of the interior of the transparent testing circular platform, and the leveling bubble, the transparent testing circular platform and the funnel are coaxial; the plastic rod is arranged inside the funnel and is used for opening or closing an opening of the funnel. The fine-particle sediment underwater repose angle measuring device and the measuring method of the fine-particle sediment underwater repose angle measuring device overcome the defects that an existing method is complex in step and interference factors are multiple, operating steps can be effectively simplified, sediment cone forming stability is improved, and therefore the measuring speed is increased, and measuring accuracy and measuring reproducibility are improved.

The invention discloses an analog measuring device and method for the surface potential of an insulator in a GIL. The analog measuring device comprises a closed cavity, the insulator, an electrostaticprobe and a high-voltage electrode guide rod. Air inlet and outlet are formed in the cavity wall surface of the closed cavity. A guide rail is installed in the closed cavity, and a first shielding cylinder and the insulator are arranged at one end of the guide rail. The insulator is rotatably disposed in the first shielding cylinder through a high-voltage electrode support rod. A second shieldingcylinder is arranged at the other end of the guide rail, and the second shielding cylinder is internally provided with the high-voltage electrode guide rod. The first shielding cylinder and the second shielding cylinder are both grounded. The electrostatic probe is movably disposed in the closed cavity, and the electrostatic probe can measure the surface potential of the insulator. The analog measuring device can complete the analog measurement of the surface potential of the insulator in the high-pressure closed cavity, and can simulate the working environment of the insulator of the GIL inreality, the measurement result is high in credibility, and theoretical guidance can be provided for actual production.

The invention is applied to the technical field of detection, and particularly relates to a method and device for detecting the linearity and perpendicularity of equipment. The method comprises the following steps of fitting and generating a mark point straight line of an X axis according to pixel coordinates of mark points in M1 acquired images, and generating a linearity testing result of the X axis of the equipment; fitting and generating a mark point straight line of a Y axis according to the pixel coordinates of the mark points in the M1 acquired images, and generating a linearity testing result of the Y axis of the equipment; generating an included angle Thetaxy between the X axis and the Y axis according to Thetax and Thetay, and generating a perpendicularity testing result of the X axis and the Y axis of the equipment. According to the method and the device, the existing problems of low equipment linearity and perpendicularity detection efficiency and high cost are solved, the application range of equipment linearity and perpendicularity detection is widened, and the equipment linearity and perpendicularity detection efficiency is improved.

The invention discloses a method for determining the stress of a sapphire single crystal material by using an X-ray diffraction method, relates to a method for determining the stress of a sapphire single crystal material and aims at solving the problem of poor measurement precision and accuracy of an existing residual stress measurement method for the sapphire single crystal material. The method comprises the steps of (1) selecting a sapphire crystal rod material, cutting the sapphire crystal rod material into a sapphire single crystal substrate and carrying out polishing treatment on the sapphire single crystal substrate; (2) determining azimuth angles phi and psi; (3) establishing a relationship coordinate system, carrying out single crystal orientation and giving a sample coordinate system S, a laboratory reference coordinate system L and a crystal coordinate system X, wherein the origins of the three coordinate systems overlap; (4) obtaining a stress-strain relationship of a singlecrystal hexagonal system material; and (5) determining the stress of the sapphire single crystal material, thereby determining sigma11, sigma12 and sigma22. The method has relatively high measurementprecision and reliability and can be popularized into a method for determining the single crystal stress of a hexagonal system sample. The method is used for determining the stress of a hexagonal crystal material.