86results about How to "Non-destructive measurement" patented technology

A method for nondestructively detecting residual stress on micro region includes utilizing XRD2 device to measure sample with residual stress to be tested to obtain XRD2 surface exploring atlas, then processing obtained atlas for obtaining a set of diffraction angle data varied in flowing Debye field angle variation at diffraction peak, obtaining relevant straight by using linear function to adapt data and obtaining relation of straight line slope to residual stress by adapting so as to calculate out residual stress of micro-region on measured sample.

The invention discloses a method for measuring the content of different state water in coal. The method comprises the steps of performing low field nuclear magnetic resonance measurement on a saturated coal sample to obtain a transverse relaxation time T2 spectrum of the saturated coal sample, calculating integral areas of the T2 spectrum of each spectral unit volume saturated coal sample; and conversing the integral areas of the T2 spectrum of each spectral unit volume saturated coal sample to the volume percent of the different state water according to obtained conversion modes established by preset standard samples. The method solves the problem that how to measure the content of different state water in the coal.

The invention discloses a method for quickly measuring circuit power consumption, wherein a power supply circuit in a circuit to be measured is designed by adopting a voltage stabilizer and the insideof the voltage stabilizer realizes voltage-stabilizing output by a negative feedback principle; and a path of voltage-stabilizing source is added at a voltage output end of the voltage stabilizer, the output voltage Vext of the voltage-stabilizing source is higher than the practical output voltage Vout of the voltage stabilizer, the output current Iext of the voltage-stabilizing source is read and the circuit power consumption is calculated by substituting the Vext and the Iext in a formula P=Vext*Iext. Under the conditions that wire jumping phenomenon does not occur and any devices on a circuit board are not taken off, the method for measuring circuit power consumption can quickly, accurately and non-destructively measure the current consumption conditions of a plurality of power domains, thereby calculating the power consumption of various paths of submodules to be measured or subsystems to realize quick positioning and confirmation of abnormal power consumption problem and furtheraccelerating the research and development and maintenance speed of electric appliances.

The invention provides a method for measuring angle of a rice flag leaf. The method includes the steps of acquiring an image of the base of the rice flag leaf and preprocessing the image, subjecting the preprocessed image to foreground extraction to acquire images of the rice flag leaf and the stem, subjecting the foreground image to binaryzation and morphological process, refining the images after the morphological process, performing linear detection to the refined images and cluster analysis to linear inclination detected, and calculating the angle of the flag leaf according to the angle value of the cluster center obtained by cluster analysis, and accordingly, can realize measuring angle of the rice flag leaf rapidly, accurately and nondestructively. The invention further provides a device for measuring angle of the rice flag leaf. The device comprises a background panel, a support, a clamping unit and an image acquisition and processing unit and is used for acquiring and processing the image of the base of the rice flag leaf.

The invention relates to crop growth detecting technology and discloses a detecting device and a detecting method for crop biomass. The detecting device comprises a bearing container, a power module, a plant height gathering module, a stem diameter gathering module, a clamping module and a data acquisition and analysis module, wherein the power module, the plant height gathering module, the stem diameter gathering module, the clamping module and the data acquisition and analysis module are respectively arranged on the bearing container. The power module supplies power for the whole device, the clamping module is used for clamping a sample to be detected, and the stem diameter gathering module and the plant height gathering module are respectively used for collecting stem diameter information and plant height information of the clamped sample to be detected and transmitting the information to the data acquisition and analysis module which conducts data processing and analysis and then building a theoretical and biomass prediction model. The plant height gathering module adopts a laser distance measuring sensor, and the stem diameter gathering module adopts a displacement sensor. The detecting device is flexible and portable, and can conduct rapid, free-damage and accurate measurement on crops such as naturally-grown wheat and rice with a plurality of stem on a single stem.

A lossless method for quantitatively detecting blood glucose by utilizing the Raman spectrum comprises the following steps that laser emitted by a semi-conductor diode transmits through skin by the adoption of a lens, the laser focuses into a blood vessel to obtain the Raman spectrum of blood, the characteristic peak of glucose and the characteristic peak intensity of hemoglobin which are obtained through the Raman spectrum are divided to obtain the relative intensity of the characteristic peak of the glucose, specific values of different blood glucose concentrations to the relative intensity of the characteristic peak of the glucose are calculated to obtain a relative intensity-concentration relation curve, and the curve serves as the basis of quantitative measurement of the blood glucose concentration; the relative intensity of the characteristic peak of the glucose in the Raman spectrum of the blood with unknown concentration is compared with the relative intensity-concentration relation curve to obtain the glucose concentration in the blood.

The invention provides a method and a system for measuring oilseed rape laminae and the forms of sclerotium scabs synchronously. The method includes the following steps of: acquiring images of the oilseed rape laminae infected with sclerotiniose; segmenting the acquired image to acquire background gridding images, and calculating pixel counts occupied by unit gridding and pixel counts occupied by unit length; extracting the images of the oilseed rape laminae, and calculating the areas, lengths and widths of the oilseed rape laminae; extracting the images of the sclerotium scabs, and calculating the areas, lengths and widths of the sclerotium scabs; and calculating the proportion of the sclerotium scabs to the integral oilseed rape laminae. The system comprises a gridding background plate, a tectorial membrane, a support, a clamping unit and an image acquisition and processing unit. By the method and the system, the synchronous, quick, accurate and nondestructive measurement of the oilseed rape laminae and the forms of the sclerotium scabs can be realized.

The present invention relates to a method for the determination of the stresses occurring in wood when drying or being dried. With the method in accordance with the invention, electrodes are used to generate an electric field in drying wood in order to measure the electric complex spectrum using the impedance spectroscopy method while at the same time employing sensors k to measure acoustic emissions from drying wood and using the results for calculating the parameters required for determining the stress state existing in the wood and for monitoring and / or controlling the drying process.

The invention provides a non-contact material hardness measuring method based on ultrasonic waves. The method comprises the steps of: acquiring an ultrasonic echo signal and a backscattering signal bydetecting the workpiece to be detected by an ultrasonic longitudinal wave echo method, thereby obtaining ultrasonic characteristic parameters; calculating the average grain size of the workpiece to be detected according to the obtained ultrasonic characteristic parameters; and obtaining the hardness value of the workpiece to be detected based on the obtained average grain size and a correlation fitting function between the workpiece hardness value and the workpiece grain size. According to the non-contact material hardness measuring method based on ultrasonic waves, it is not necessary to directly contact the workpiece to be detected, and thus does not cause damage to the workpiece. Moreover, several characteristic parameters fed back by the ultrasonic wave detection of the workpiece arecomprehensively considered to ensure that the hardness value of the workpiece obtained by detection has high accuracy. At the same time, the time required for the detection is short, and the hardnessvalue of a large number of workpieces can be measured quickly and non-destructively.

The invention discloses a method and a system for measuring a single fruit tree yield. Three-dimensional point cloud data of a fruit tree are obtained and are pre-processed to obtain a three-dimensional point cloud data set of the fruit tree; the three-dimensional point cloud data set of the fruit tree is divided to obtain a fruit three-dimensional point cloud data set which only comprises fruit information; statistics is carried on the fruit three-dimensional point cloud data set to obtain N fruit three-dimensional point cloud data subsets and the number of fruits N; the fruit radius of each corresponding fruit is calculated according to the fruit three-dimensional point cloud data subsets to obtain a fruit radius digit group; fruit weight corresponding to each fruit radius in the fruit radius digit group is calculated one by one according to basic parameters of a relation model of fruit radius and fruit weight, and the yield of the whole fruit tree is calculated through accumulation. The method and the system for measuring the single fruit tree yield are capable of measuring the single fruit tree yield accurately, quickly and harmlessly.

The invention relates to a spectrum rapid nondestructive testing method for testing the content of vitamin C in fruit and vegetable, which relates to a rapid nondestructive testing method for testing the content of vitamin C in fruit and vegetable through utilizing visible light and a near infrared diffuse reflectance spectroscopy analytic technique. The testing method which is adopted at present has the disadvantages of destructive test, slow testing speed, low efficiency and high production cost. The technical proposal which is provided by the spectrum rapid nondestructive testing method specifically comprises gathering samples, gathering and selecting modeling samples, gathering the spectrum of modeling samples, measuring the reference chemical value of modeling samples, correcting mathematical model building, correcting mathematical model proof, and predicting unknown samples. The spectrum rapid nondestructive testing method is mainly used to rapidly and efficiently achieve the nondestructive inspection of the content of vitamin C in various fruit and vegetable. The invention has the advantages of fast testing speed, high testing precision, little artificial error and low detecting cost, which does not need chemical agent, and does not pollute environment.

The invention discloses a quantum key distribution network system and method based on orbital angular momentum multiplexing. The system comprises an Alice control side, an orbital angular momentum mode division multiplexing unit and a Bob user side. The Alice control side comprises a signal modulation unit and an orbital angular momentum multiplexing unit. The orbital angular momentum mode division multiplexing unit comprises a Galileo telescope assembly and an orbital angular momentum separation device. The Bob user side comprises N Bob users. Each Bob user comprises a polarization controllerand a detection device. A light signal generated by the signal modulation unit enters the orbital angular momentum multiplexing unit, the Galileo telescope assembly and the orbital angular momentum separation device in sequence, then is transmitted to the polarization controller of the corresponding Bob user side and finally enters the detection device for detection. According to the system and method, one-to-many communication of quantum network communication is realized, each user is relatively independent, the number of the users can be increased as the orbital angular momentum multiplexing is increased, and the system and the method have high expandability and relatively high practicability.

The invention provides a corncob moisture content measurement device and method. A measurement circuit comprises a high-frequency signal oscillating source, a transmission line, a measurement electrode, a first detection circuit, a second detection circuit and a calculation circuit; the high-frequency signal oscillating source, the transmission line and the measurement electrode are connected in sequence; one end of the first detection circuit and one end of the second detection circuit are connected to two ends of the transmission line respectively; the other ends of the first detection circuit and the first detection circuit are connected with input of the calculation circuit respectively; the measurement electrode is in contact with surfaces of corncobs and is used for outputting corresponding output resistance according to the moisture content of the corncobs, and generating a reflection signal when a high-frequency sine wave signal which is generated and transmitted by the high-frequency signal oscillating source is received and the resistance of the transmission line is not matched with the output resistance of the measurement electrode; forward and backward signals generate moving standing waves on the transmission line; alternating-current signals at two ends of the transmission line, which are detected by the two detection circuits, are converted into direct-current signals, and voltage values corresponding to the signals are transmitted to the calculation circuit; the calculation circuit is used for calculating pressure difference value output according to the voltage values. The corncob moisture content measurement device and method can realize rapid, lossless and accurate measurement.

The invention relates to a detection method of a leaf area index. The method comprises: (1), n zenith angles are selected and light intensities of the n zenith angles are measured at the top and bottom of a plant; (2), according to a transmissivity, an average contact frequency is calculated; and (3), a leaf area index is calculated. With the method, the leaf area index and correlated parameters of the crop at the area can be obtained by analyses and statistics based on light energy changes. The method has characteristics of precise, rapid, and nondestructive measurement. Compared with the direct measurement method, the leaf area index can be obtained rapidly and automatically at the large area, so that the workload can be reduced substantially.

The invention discloses an unsaturated roadbed soil freeze-thaw cycle model test system, relates to a freeze-thaw cycle test device, and aims to solve the problem that an existing freeze-thaw cycle test device cannot truly and accurately reflect the comprehensive influence of temperature, moisture and load in the actual freeze-thaw cycle process, wherein the device comprises a test bin, a controlsystem and a data acquisition system, and the test bin comprises a sleeve, a heat preservation body and a water permeable part; a test piece is loaded in the sleeve, the side wall is hermetically wrapped with a thermal insulator, and the water permeable part is arranged at the bottom; the control system comprises a temperature control system, a moisture control system and a load control system; the temperature control system comprises a temperature control chamber, an upper temperature control disc and a lower temperature control disc; the temperature control chamber covers the test bin; the upper temperature control disc and the lower temperature control disc are respectively arranged at the top and the bottom of the sleeve; the moisture control system is communicated with the bottom of the test piece through a water supplementing pipe; the load control system is arranged at the top of the sleeve; the data acquisition system comprises a temperature acquisition system, a moisture acquisition system and a displacement acquisition system.

The invention discloses a device for detecting thickness of photoresist on a curved surface and a method for detecting thickness of photoresist on the curved surface point by point. The device comprises a laser transmitter, a guide, a beam splitter prism, a first optical power meter, a second optical power meter and a lens, wherein the beam splitter prism is arranged on the guide; the light rays transmitted by the laser transmitter irradiate the beam splitter prism; the transmitted light rays passing through the beam splitter prism irradiate the first optical power meter; the reflected light rays passing through the beam splitter prism irradiate the lens; the light rays passing through the lens enter along the direction of the center of sphere of the curved surface on a photoresist layer of a detected sample, return along an entrance light path after being reflected by the detected curved surface on the photoresist layer and irradiate the second optical power meter after passing through the lens and the beam splitter prism in turn. The invention can realize point-by-point measurement of the thickness and distribution of the photoresist on the substrate of the curved surface without destruction.

The invention provides a plastic optical fiber transmission loss nondestructive detection method which comprises the following steps that light signal injection and light signal extraction are respectively realized by a light injection module and a light extraction module at any one section of proper length of two optical fiber nodes on a production line, wherein the light injection module and the light extraction module are respectively and mainly formed by a refractive index matching block, refractive index matching liquid and an optical fiber bending clamper; optical fiber transmission loss coefficients are obtained through treating detected optical power information; and further, the real-time measurement of the transmission loss coefficients on the production line is realized, and the all-weather online monitoring production process is realized. Meanwhile, the method has the beneficial effects that optical fibers does not need to be cut off, and no any damage can be generated to the optical fibers in the processes of light injection and light extraction, so that the nondestructive measurement can also be realized.

The invention discloses a magneto-optic photoluminescence photo reflectance and light modulated transmission spectrum joint testing system. The system comprises a broadband infrared source and Fouriertransform component, a low-temperature high-intensity magnetic field system, a reflecting / transmitting light path sub-module, a pump / modulation dual-purpose AC output laser and a guide light path thereof, a computer controlled multifunctional spectrum test switching component, a spectral signal detection and demodulation module and a computer, wherein the low-temperature high-intensity magnetic field system comprises an infrared optical window; the reflecting / transmitting light path sub-module is used for broadband light incidence and collection; the computer controls the system operation. The system disclosed by the invention can realize combined measurement of magneto-optic photoluminescence, photoreflectance and light modulation transmission aiming at the same specific light spot position of a semiconductor material, and reliable contrast of different magnetic field spectrum characteristics of materials is formed. The system disclosed by the invention has the advantages of being comprehensive, nondestructive and high in sensitivity, and is very applicable to spectroscopic detection of the optical property of the semiconductor, electronic structure and magnetic effect characteristics.

The invention provides a method for measuring the length and width of an irregular object. The method is characterized by comprising the following steps of: step 1, acquiring a to-be-measured object picture, and converting the picture into a grayscale matrix graph; step 2, performing median filtering and de-noising processing on the grayscale matrix graph; step 3, performing threshold segmentation on the denoised grayscale image; step 4, performing edge extraction on the segmented image; step 5, calculating the slope rate of a tobacco stem; and step 6, calculating the length and width of the stem. The method for measuring the length and width of the irregular object is capable of rapidly and non-destructively measuring the length and width of the tobacco stem.

The invention discloses a curved surface bondline thickness full-field detection device and a detection method thereof. The detection device comprises a tunable laser, a lens, a dispersion prism, a lens and a photodetector array CCD, wherein emergent light of the tunable laser passes through the lens and the dispersion prism and then is reflected to the lens, the light is reflected on a surface to be detected after passing through the lens; and the light reflected on the surface to be detected is returned in an original path, passes through the lens and the dispersion prism and illuminates on the photodetector array CCD. The bondline thickness distribution is calculated according to a reflected light energy ratio variation obtained on the photodetector array CCD 5; and a bondline reflectivity is solved according to a measuring principle so as to calculate the bondline thickness distribution. The device and the method can losslessly detect photoresist full-field thickness distribution on a curved substrate, are suitable for photoresist thickness detection when a microstructure of the curved substrate is process by a photoetching method, and are also suitable for film thickness measurement of other curved substrates.

The invention relates to a leaf area index instrument based on the radiation measurement principle. The leaf area index instrument comprises a detector and a data processing device for processing light intensity information collected by the detector. The detector comprises a fish-eye lens, a light filter, a convex lens and a processing circuit which are arranged coaxially. The fish-eye lens is used for collecting full-field incident light. When a horizontal instrument displays the horizontal position, the optical axis of the fish-eye lens is perpendicularly upward. The instrument can obtain leaf area indexes and relative parameters of crops of the region through analytic statistic on the basis of light energy changes, and the leaf area index instrument has the advantage of being capable of precisely and rapidly measuring with no damage. Compared with a direct measurement method, the leaf area indexes can be obtained automatically and more rapidly in a larger range, and workloads are greatly lowered.

The invention discloses a product parameter ultrasonic on-line measuring method in co-injection, comprising: (1) in a direction perpendicular to plastic melt flow, emitting ultrasonic wave to a product in a molding process, and collecting the reflection echo LB and reflection echo LS of the ultrasonic wave of a same time: the reflection echo LB is generated by the ultrasonic wave on a molding interface; and the reflection echo LS is generated by the ultrasonic wave on a plastic mold interface; (2) calculating the time interval delta t between the LB and the LS, and obtaining the surface wall thickness h of a plastic product; and (3) calculating the core layer length of a plastic product according to the surface wall thickness h. According to the invention, the method can measure the wall thickness and length of each layer of a plastic product without damaging the product, and has the advantage of nondestructive measurement; the method can obtain the wall thickness and length of each layer through ultrasonic wave signals, does not need off-line operation after preparation of a product, can perform real-time on-line lossless measurement, and has the characteristics of simple operation and high precision.

The invention discloses a method for nuclear magnetic resonance measurement of a coal core average pore compression coefficient. The method comprises 1, carrying out low magnetic field nuclear magnetic resonance measurement on a saturated water coal core under different confining pressures to obtain transverse relaxation time T2 spectrums and spectrum peak areas of the saturated water coal core under the different confining pressures, and 2, calculating an average pore compression coefficient by the spectrum peak areas of the T2 spectrums according to a pore compression coefficient reduction formula. The method realizes fast, lossless and refined measurement of the coal core pore compression coefficient and can be operated simply.

The invention belongs to the technical field of detection of physical characteristics of a material and relates to a method for measuring a Young modulus of an inlaid thin film. The method comprises the following steps of: (1) establishing a simulation model of the inlaid thin film and a silicon substrate; (2) determining parameters of the inlaid thin film and the silicon substrate; (3) determining boundary conditions of the inlaid thin film and the silicon substrate; (4) drawing a theoretical frequency dispersion curve by using a finite element method when a series of inlaid thin film substrates have different Young modulus; (5) measuring an actual frequency dispersion curve of the inlaid thin film of a sample to be detected; and (6) matching the measured actual frequency dispersion curve of the inlaid thin film of the sample to be detected with the theoretical frequency dispersion curve to obtain the Young modulus of the inlaid thin film. With the adoption of the method provided by the invention, the Young modulus of a dielectric medium material can be rapidly and accurately measured without losses, thereby solving the problem that the traditional method cannot measure the Youngmodulus of the dielectric medium material in an inlaid structure thin film.

The invention relates to a particle granularity measuring method based on a two-dimensional Raman spectrum. The method includes the steps that all sets of particle matter with the known particle granularity are selected for a certain kind of particle matter, each set of particle matter has the same particle granularity, and the two-dimensional Raman spectrum of all the sets of particle matter with the known particle granularity is acquired; a feature Raman spectrum peak of each set of particle matter is truncated; a mathematical expression of the feature Raman spectrum peaks is acquired through a two-dimensional data fitting method; the half-peak widths W of the feature Raman spectrum peaks are extracted; the relational expression between the particle granularity P of the particle matter and the half-peak widths W is fit; the two-dimensional Raman spectrum of the particle matter with the to-be-measured particle granularity is acquired, the half-peak widths W of the spectrum are obtained according to the step of two-dimensional data fitting analysis, and then the particle granularity P is measured according to the relational expression between the particle granularity P of the particle matter and the half-peak widths W. The particle granularity of the matter can be simply, rapidly and losslessly measured.

The invention relates to an algorithm for rapidly detecting the triaxial sizes of coarse cereal crop grains. The algorithm comprises the following steps: flatly placing a plurality of coarse cereal crop grains to be detected and a coin with the standard size, placing under a red LED backlight source, and acquiring projection images of the coarse cereal crop grains to be detected and the coin with the standard size; converting the projection images into grayscale images, and then converting the grayscale images to binary images and negatives thereof; drawing the minimal circumscribed rectangles of all the coarse cereal crop grains to be detected so as to obtain the length size values and the width size values of the minimal circumscribed rectangles under the projection images; linearly placing the plurality of coarse cereal crop grains to be detected and the coin with the standard size, placing under the red LED backlight source, acquiring side view images of the coarse cereal crop grains to be detected and the coin with the standard size, and then obtaining the vertical size values, namely the height size values, of the minimal circumscribed rectangles under the side view images. Through the technical scheme adopted by the invention, the problems of large measurement error and low efficiency caused by manual measurement in the conventional technology for measuring the triaxial sizes of the coarse cereal crop grains can be solved.

The invention relates to a filter stick measuring table, a nondestructive measurement device and a method for the length of segmented rods of a filter stick. The nondestructive measurement device comprises the filter stick measuring table, an imaging device and a controller. The filter stick measuring table comprises a bearing device and a light sealing outer shell. The bearing device comprises a bearing groove for enabling filter stick to be placed horizontally. A light guide groove is arranged below the bearing groove. A strong-light linear light source is arranged at the bottom of the light guide groove along the length direction of the light guide groove. The strong-light linear light source is welded on a printed circuit board (PCB). According to the nondestructive measurement device, a light transmission method is mainly adopted, a highlight light source is utilized to irradiate the filter stick. Due to the fact that the absorption strength of different filter stick segments to light rays, an imaging method is used for catching the light intensity weakened through transmission. The image gray values corresponding to the different filter stick segments are different. The length of the gray segments can be measured though an image, and then the length of each filter stick segment of the filter stick can be obtained. Consequently, the nondestructive measurement of the length of each filter stick segment of the filter stick is achieved.

The invention discloses a laser ultrasonic system and method for detecting the thermal diffusivity of a nano-film in a non-contact mode. The system comprises an exciting light emitting module, a detection light emitting module, a dichroscope, a phase mask plate, a dimmer, a first achromatic lens, a phase regulator, a second achromatic lens, a movable sample table and a signal receiving module. According to the invention, the thermal diffusivity of the nano-film is further obtained by analyzing the heterodyne signal carrying the micro-vibration information detected by the detector.

The present invention discloses a method and a system for nondestructive measurement of the density of a wood, and belongs to the technical field of measurement. The method comprises: obtaining a microwave band adapted to the density of an attribute-known wood to be measured; measuring the wood to be measured by using the microwave in the microwave band; calculating the dielectric constant of the wood to be measured according to the reflected microwave signal returned from the wood to be measured; and calculating the density of the wood to be measured according to the model of the relationship between the wood density and the dielectric constant of the wood and the model parameter corresponding to the attribute. The system comprises a probe, a microwave signal transmitting and receiving module, a data processing module, a man-machine interface and a control module. With the system and the method of the present invention, the advantages of nondestructive measurement of wood density, wide measurement range, rapid measurement, manpower saving, material resource saving and measurement accuracy improving can be provided.