49 results about "Destructive sampling" patented technology

The invention relates to the technical field of quality detection, in particular to a gas atomization powder sphericity degree multi-dimensional online analysis system and a method thereof.The gas atomization powder sphericity degree multi-dimensional online analysis system comprises a dynamic dual-mode imaging module, a transverse wind field auxiliary detection unit and a multi-dimensional feature fusion analysis module; the transverse wind field auxiliary detection unit is used for applying controllable transverse wind power through an airflow nozzle orthogonal to the powder falling direction and measuring the deflection track of gas atomization powder ball particles in combination with a laser displacement sensor. The online calibration module is used for spraying standardized spherical particles to the powder flow according to a preset period; the traditional density detection depends on destructive sampling and off-line measurement, the efficiency is low, and the whole production line particles cannot be covered; through an orthogonal wind field trajectory inversion technology, a density value and an internal defect mark are synchronously output through non-contact dynamic measurement, 100% lossless online full inspection of a production line is realized, and sampling limitation and aging bottleneck of a traditional means are broken through.

The invention discloses an intelligent quality inspection system for medicinal empty capsules, particularly relates to the field of intelligent detection, and comprises a multi-dimensional optical characteristic acquisition module, a dynamic thermodynamic response analysis module, a near infrared spectrum component inversion module, a multi-source data fusion decision module and a self-adaptive feedback optimization module. Omnibearing nondestructive detection of the capsule is realized through non-contact multispectral imaging and vibration response analysis, traditional destructive sampling loss is thoroughly avoided, and the multisource data fusion module integrates optical texture features, mechanical frequency domain energy density and near infrared spectrum inversion values based on the D-S evidence theory, so that the detection accuracy is improved. And the self-adaptive optimization module dynamically adjusts an optical wavelength weight, a mechanical sweep frequency range and a spectrum modeling parameter by applying reinforcement learning, is self-adaptive to fluctuation of different batches of gelatin materials and environmental interference, remarkably reduces a misjudgment rate and ensures continuous and stable operation of a production line.

The invention relates to an intelligent control method and system for high-pressure atomization irrigation and a storage medium of the intelligent control method and system, and aims to solve the problem that the quality is inconsistent due to the fact that traditional water and fertilizer management of high-value crops is difficult to sense the internal physiological state of the crops in real time. Randomly selecting a plurality of offering samples in each management partition for destructive sampling, and obtaining crop truth value data through physiological and biochemical detection; then, an irrigation rule base is established and dynamically updated based on the truth value data, and then variable control instructions are generated for the management partitions in combination with the real-time environment data; the invention further provides a system for implementing the method and a storage medium, accurate regulation and control starting from real demands of crop bodies are achieved, the consistency of crop quality and the resource utilization efficiency are effectively improved, and self-learning and predictive prevention and control capabilities are achieved.

The invention discloses a method for detecting the water absorption rate of silicone rubber by combining near infrared spectroscopy with CPO-SVM, and belongs to the technical field of detection of high- The invention aims to solve the problems of destructive sampling, complex operation, sensitivity interference, strong subjectivity of indirect evaluation and the like in the traditional detection method. The method comprises the following steps: firstly, obtaining a composite insulator silicone rubber sample, and collecting near infrared spectrum data of the composite insulator silicone rubber sample; then, carrying out standard normal variable transformation pretreatment on the spectroscopic data to eliminate interference caused by physical property difference on the surface of the sample; then, accurately extracting a key wavelength from the high-dimensional spectral data by using a competitive self-adaptive reweighting algorithm; and finally, establishing a support vector machine model optimized by a crown porcupine optimization algorithm, and carrying out quantitative analysis on the water absorption rate of the silicone rubber. According to the method, rapid, accurate and nondestructive detection of the water absorption rate of the silicone rubber is realized, real-time and reliable data support is provided for operation and maintenance of a high-voltage insulating material, safe and stable operation of a power grid is effectively guaranteed, and the method has a wide application prospect.

The application relates to an intelligent control method and system of high-pressure atomization irrigation and a storage medium thereof, and aims to solve the problem that traditional water and fertilizer management of high-value crops cannot realize real-time sensing of internal physiological states of crops, leading to inconsistent quality. The intelligent control method divides an irrigation area into multiple management partitions, randomly selects a plurality of sacrifice samples in each management partition, destructively samples the sacrifice samples, obtains true value data of crops through physiological and biochemical detection, establishes and dynamically updates an irrigation rule library based on the true value data, generates variable control instructions for each management partition in combination with real-time environmental data, and finally controls a high-pressure atomization sprinkler irrigation system to accurately execute. The application also provides a system and a storage medium for realizing the method, realizes accurate regulation and control starting from the real demand of crops, effectively improves the consistency of crop quality and the resource utilization efficiency, and has self-learning and predictive prevention and control capabilities.

This invention provides an Indel molecular marker closely related to the soluble sugar content of pepper fruit and its application, belonging to the technical field of nucleic acid-based assay methods. The nucleotide sequence of the Indel molecular marker is shown in SEQ ID NO.1 of the sequence listing; the Indel molecular marker is located at positions 5274716-5274727 of the full-length sequence of chromosome 3 of the pepper reference genome. Primers for amplifying the Indel molecular marker include a forward primer and a reverse primer. The nucleotide sequence of the forward primer is shown in SEQ ID NO.2 of the sequence listing, and the nucleotide sequence of the reverse primer is shown in SEQ ID NO.3 of the sequence listing. This molecular marker can be directly applied in early generations of breeding, avoiding the destructive sampling of chemical detection, significantly reducing breeding costs, effectively shortening the breeding cycle, and greatly improving the selection efficiency of molecular marker-assisted breeding in peppers.

This disclosure provides automated, high-throughput methods and systems for generating microspore-derived doubled haploid structures, plantlets, and crop plants, and progeny thereof. Methods of integrating computer vision and artificial intelligence into a variety of steps including microspore selection, culture, sorting, and genotyping are disclosed. Multiplexed genome-editing of microspores through cargo delivery, non-destructive sampling, and genotyping are also described.

The present application belongs to the field of ham processing, and mainly relates to a ham segmentation temperature and humidity control curing method. In view of the problem that the existing ham curing process excessively relies on manual experience for grouping, sampling inspection and stage switching judgment, resulting in insufficient automation, lagging internal state recognition and difficulty in matching the environment regulation and individual state, a ham curing state recognition mechanism and a segmentation switching judgment mechanism are established to evaluate the mass transfer state of different hams in the curing process, and the curing environment parameters are dynamically corrected in combination with the hanging position disturbance, so as to continuously generate control parameters suitable for the current state. The method can recognize the internal mass transfer state of the ham without relying on destructive sampling inspection, realize the dynamic switching of the curing stage and the rolling adjustment of the temperature and humidity control parameters, so as to improve the automation degree and stability of the ham curing process.

This invention discloses a non-destructive sampling method for studying the interaction between AM fungi and mycelial bacteria. Step 1: Sterilized culture medium is filled into the root chamber and the mycelial growth chamber, and the outer end of the mycelial growth chamber is sealed; the inner end of the mycelial growth chamber is connected to the root chamber. Step 2: Corn seeds are planted in the culture medium in the root chamber, and AM fungal spores are added to the root chamber while simultaneously cultivating them using nutrient solution and water. Step 3: Collection is performed, consisting of collecting pure mycelia and collecting fresh soil affected by pure AM fungal mycelia. This invention uses non-destructive sampling under pot conditions to collect pure, uncontaminated AM fungal mycelia and mycelial soil affected by AM fungi for scientific research on mycelial interactions.

The invention provides a biosensor for detecting nitrate content as well as a preparation method and application thereof, and relates to the technical field of biology. The biosensor disclosed by the invention comprises a luciferase amino terminal fragment, a luciferase carboxyl terminal fragment and NasR protein, the luciferase amino terminal fragment and the luciferase carboxyl terminal fragment are two fragments of the same luciferase. The biosensor provided by the invention has high selectivity on nitrate, can specifically, stably, continuously and online observe the nitrate content in the whole plant for a long time, and overcomes the key problems of destructive sampling, limited spatial resolution, insufficient detection sensitivity and the like in the traditional method; and a real-time dynamic detection platform capable of monitoring the whole plant living body is provided for plant nitrogen metabolism research.

The invention discloses a method for measuring carbon reserve of celery more accurately and simply, and belongs to the technical field of agricultural ecological carbon sink measurement. The method comprises the following steps: firstly, collecting a celery sample in a quadrat, measuring plant height, stem diameter and relative chlorophyll content (SPAD value), then obtaining the fresh weight of an overground part through destructive sampling, and constructing a three-parameter fresh weight prediction model containing H, Dand SPAD by utilizing multiple regression; secondly, performing non-destructive field measurement in a to-be-measured area to obtain plant heights, stem diameters and SPAD values of a large number of samples, and substituting the plant heights, the stem diameters and the SPAD values into the model to calculate the predicted fresh weight of a single plant; and finally, combining the planting density and the carbon content conversion coefficient to calculate the carbon reserve of the celery in unit area. According to the method, the defects that a traditional drying method is high in destructiveness and long in period are overcome, the model prediction precision is remarkably improved by introducing SPAD physiological indexes, rapid, in-situ and low-cost measurement of the celery carbon reserves is achieved, the relative error can be controlled within 5%, and the method is suitable for accurate accounting of farmland carbon sequestration.

The invention provides a method for determining fracture toughness of a metal material by calculating an energy release rate based on a micro sample, and relates to the technical field of performance detection of in-service pressure containers and pipeline parts. According to the method, a small punching test is combined with an energy release rate formula, finite element simulation is avoided, two small wafer samples with different notch lengths are prepared, test loads and punch displacement data are collected, small punching energy is calculated, and then the fracture toughness is obtained. Three-point bending test results are accurately associated, and the reliability of the method is verified. Approximate lossless sampling is achieved, operation is simple, cost is low, and reliable data support is provided for safety assessment of in-service equipment.

The invention discloses a dynamic nondestructive testing device and method for the thermal expansion coefficient of a diamond wafer, and solves the problems of single expansion measurement direction, sampling destruction, high cost, even inapplicability and the like in the traditional thermal expansion coefficient test. The testing device comprises an axial laser displacement sensor, a radial laser displacement sensor and a heating bin, a heating mechanism and a rotating mechanism are arranged in the heating bin, the rotating mechanism is provided with a supporting platform used for bearing a diamond wafer to be tested, the upper portion of the heating bin is provided with a thickness direction observation window, and the side portion of the heating bin is provided with a lateral observation window. The axial laser displacement sensor corresponds to the thickness direction observation window, the radial laser displacement sensor corresponds to the lateral observation window, and the heating bin is further connected with a gas protection mechanism. According to the invention, thermal expansion coefficients in different directions can be tested separately; the thermal expansion coefficient of the diamond wafers of different sizes and specifications can be measured in a lossless and low-cost mode, and meanwhile the problems that the measurement expansion direction is single, and the size has special requirements are solved.

The invention discloses a nondestructive testing method for the solid solution state of 18Cr-8Ni series austenitic stainless steel bent pipes. The nondestructive testing method comprises the steps that S1, the 18Cr-8Ni series austenitic stainless steel bent pipes with the bending angle being theta are selected; s2, setting relative permeability detector parameters; s3, uniformly selecting a plurality of detection angles alpha in a range of 0-theta; s4, respectively testing the relative permeability of the detection points corresponding to different detection angles alpha of the 18Cr-8Ni series austenitic stainless steel elbow pipe, and simultaneously testing the relative permeability of the 18Cr-8Ni series austenitic stainless steel elbow pipe at the maximum deformation quantity theta / 2; and S5, according to the relative permeability, measured in the step S4, of the 18Cr-8Ni series austenitic stainless steel bent pipe, judging whether the bent pipe is subjected to solid solution or not. According to the nondestructive testing method for the solid solution state of the 18Cr-8Ni series austenitic stainless steel bent pipe, the problem that the austenitic stainless steel bent pipe needs to be subjected to destructive sampling in an existing detection technology is solved.

This invention discloses a sampling and observation device and operating method for preliminary judgment of the natural resin formation of agarwood, relating to the field of guiding mechanism technology. It includes a main body, a sampling structure at one end of the main body, a pushing component at the end of the sampling structure away from the main body, and a sampling channel at the axis of the sampling structure. One end of the sampling channel is connected to the main body. The sampling structure includes a sampling component and a gripping part for sampling agarwood. The pushing component includes a pushing part, the outer diameter of which is the same as the inner diameter of the sampling channel. The sampling component allows for minimally invasive sampling of the agarwood tree, avoiding destructive sampling methods such as cutting down trees or drilling holes. Only a small incision needs to be made in the tree to obtain samples from inside the trunk. Furthermore, because agarwood is relatively viscous, the pushing part can push the sample inside the sampling channel into the main body, preventing the agarwood from clogging the sampling channel.

The invention discloses a pressure-resistant corrugated carton detection device and a detection method, and belongs to the technical field of nondestructive detection of packaging materials. The device comprises a conveying platform, and a deformation sensing module, a dynamic excitation module and a control module which are arranged in a detection part of the conveying platform. The core of the deformation sensing module is a flexible pressure distribution sensing liner which can be placed in the carton, and the deformation sensing module is used for acquiring two-dimensional pressure distribution image data of the side wall in real time; and the dynamic excitation module is used for applying programmable mechanical excitation to the carton. And the control module comprehensively judges the structural rigidity and bonding quality of the corrugated carton and positions defects by analyzing the uniformity, symmetry, pressure gradient and dynamic change characteristics of the pressure distribution image in the excitation state. According to the invention, rapid, comprehensive and nondestructive testing of the compression resistance of the corrugated carton is realized, the defects of traditional destructive sampling inspection are overcome, and the quality control efficiency and reliability of a production line are remarkably improved.

The application provides a crop water requirement dynamic calculation method and an intelligent irrigation system, and relates to the technical field of agricultural irrigation.The crop water requirement dynamic calculation method adopts a quantum dot fluorescence probe array to accurately obtain soil water activity with a 0.1mm spatial resolution, and the accuracy is improved by 3-5 times compared with that of a traditional sensor; terahertz spectrum technology is used to analyze leaf cell sap osmotic pressure, so that nondestructive detection of crop physiological water requirement signals is realized, destructive sampling is avoided, a multi-modal fusion model is used in combination with transfer learning and a quantum correction factor, the water requirement calculation error is less than or equal to 3%, the dynamic response speed is improved to the hour level, the blockchain technology ensures data authenticity, the flow control accuracy of a magneto-rheological actuator reaches + / - 2% FS, and the water saving rate is more than 30%.

The application discloses a kind of geotechnical survey system and porosity measurement method and saturation measurement method, and geotechnical survey system includes: at least one heating structure, first position is installed at inside of geotechnical sample;First temperature measuring structure, first position is installed at inside of the geotechnical sample or second position is installed at inside of the geotechnical sample;Data processing device, with the heating structure and the first temperature measuring structure electric connection can be according to the heating time and heating power of the heating structure and the temperature change analysis and processing of the installation place of the first temperature measuring structure obtain the parameter to be measured of the geotechnical sample.The application is analyzed and processed according to the thermal response characteristics of geotechnical sample, and the porosity and saturation of geotechnical sample can be obtained, and formation can be directly measured in field or downhole, without destructive sampling or coring, so that artificial disturbance and error possibly introduced in sample preparation process can be avoided.

The present invention discloses a non-destructive fish sampling and measurement device and method based on machine vision, relating to the field of fish sampling technology. The measurement device includes a collection chamber, an induction component, and a camera. A support frame is installed at the inlet of the collection chamber, and the outlet of the collection chamber is connected to a large measurement chamber. The side walls of the collection chamber are connected to the inlets of small and medium-sized measurement chambers. The collection chamber and the small to large measurement chambers are all equipped with an induction component, a camera, and a proximity switch, and an LED fill light matrix light is provided at the outlet. The camera, proximity switch, and LED fill light matrix light are all electrically connected to a computer on the water surface. The measurement method includes attracting, classifying and guiding, controlling the number, measuring, operating an image acquisition device, outputting images, and processing images. The present invention utilizes the phototaxis of fish to achieve fish attracting, guides fish by dissolved oxygen concentration, flow direction, and successively increasing light intensity, and achieves non-destructive fish sampling and measurement through machine vision.

The utility model belongs to the technical field of non-standard detection devices, and provides a steel ball detection mechanism, which comprises a fixed part, a fixed part and a detection mechanism, the detection rod is movably arranged at one end of the fixing piece in the axis direction of the detection rod, one end of the detection rod is movably inserted into the fixing piece in a penetrating mode, and the installation position, used for installing the steel ball, on the workpiece is located on the moving path of the detection rod. Compared with the prior art, by arranging the fixing piece with the feeding state and the fixing state and the detection rod capable of moving in the axial direction and combining the design of the two moving states of the detection rod, whether pressure leakage happens to the steel ball or not and whether the binding force between the steel ball and an installation position reaches the standard or not can be automatically judged; compared with a traditional mode depending on manual visual inspection and destructive sampling inspection, the scheme has the advantages that the detection efficiency and the detection precision are remarkably improved, meanwhile, non-destructive full-number detection is realized, and the product quality control level is improved.

The present invention discloses a non-destructive sampling device, comprising: a sampling assembly, which includes a sampling tube, a connecting sleeve, a hollow shaft, a central shaft and a sampling piston, wherein the hollow shaft is provided with a plurality of exhaust holes and a rubber ring; a driving assembly, which includes a lower sealing sleeve, a pressure cylinder, a penetration piston slidingly arranged in the pressure cylinder, an upper sealing sleeve sealed and fixed at the upper end of the pressure cylinder, a high-pressure water pipe connected to the pressure cylinder, a drainage part and a water inlet part; a sleeve assembly, wherein a limiting sleeve is arranged on the outside of the sampling assembly; a positioning assembly, which includes a fixed part and a sliding part, and when the sliding part abuts against the fixed part, the pressure cylinder is positioned in the sleeve assembly; and a suspension assembly fixed to the sliding part. The soil layer samples extracted by this device have a small degree of damage and high construction efficiency, meeting the survey requirements of the first-class offshore engineering level. A non-destructive sampling method is disclosed, which is based on the non-destructive sampling device of the present invention for sampling, and has the beneficial effects of small sample damage and high sampling efficiency.

The invention discloses an indoor soil culture experiment stratified sampling device, and relates to the field of agricultural soil culture devices.The indoor soil culture experiment stratified sampling device comprises a foundation pot and separation pots, the top of the foundation pot is detachably connected with the multiple separation pots, the interiors of the foundation pot and the separation pots are used for being filled with soil, and separation blade assemblies and probes are arranged in the separation pots; the partition blade assembly moves to realize communication or closing between the adjacent partition basins and between the partition basins and the basic basin; and the probe can radially stretch out and draw back in the soil body so as to collect the soil parameters of the target soil layer in situ in real time one by one. Under the condition that other soil layers are not damaged, sampling operation such as soil sampling or monitoring can be conducted on a certain soil layer independently, vertical disturbance of soil layering is avoided, the integrity of the soil structure is ensured, and meanwhile it is not needed to arrange multiple sets of repetitions due to destructive sampling.

The invention discloses a universal automatic sampling device and method for chromatographic detection of an in-situ reaction system, and the device comprises a valve group module, a valve pump automatic control module and a channel selection module, the valve group module comprises a sampling valve pump unit and at least one channel valve pump unit, the sample injection valve pump unit comprises a sample injection port six-way valve, a vacuum pump four-way valve, a vacuum pump and a quantitative ring which are connected in series; each channel valve pump unit comprises a channel six-way valve, a channel four-way valve and a channel circulating pump which are connected in series; the valve pump automatic control module comprises a programmable action controller and a pressure switch; the channel selection module switches a static sampling mode or a dynamic sampling mode by controlling the valve switching state of a four-way valve of each channel, and lossless sampling of sample gas is realized through suction of a vacuum quantitative ring; the in-situ reaction system sampling device not only can realize lossless automatic sampling of an in-situ reaction system, but also can be universally used in multi-channel and static or dynamic reaction systems, and is high in universality.

The application discloses a layered sampling monitoring device and method for freeze-thaw cycle test, which comprises a freeze-thaw cycle box, a layered soil sample culture unit, an in-situ monitoring unit and a non-destructive sampling unit. The application provides a layered sampling monitoring device and test method for freeze-thaw cycle test, which has a reasonable structure design and is convenient to operate. The device can realize non-destructive or slightly destructive extraction of target soil samples after different freeze-thaw cycles without damaging the continuity of the whole test, and can realize real-time monitoring of the moisture content and temperature changes of the soil samples in the freezing and thawing process, thereby providing accurate and continuous test data for in-depth study of the evolution law of the freeze-thaw cycle on the soil properties. The device and method of the application significantly improve the continuity and accuracy of the data, and provide a powerful tool for revealing the effect of freeze-thaw on the soil erosion mechanism.

This invention provides an effective evaluation method for the dynamic repair effect of microbial self-healing concrete, relating to the field of intelligent building material performance monitoring technology. An effective evaluation system for the dynamic repair effect of microbial self-healing concrete includes a monitoring unit, a time-series image acquisition unit, a data acquisition and transmission unit, and a dynamic repair analysis platform. The monitoring unit is a multimodal sensor array embedded inside the concrete specimen. The sensor array components include distributed fiber optic strain sensors, embedded micro-stress sensors, temperature and humidity sensors, pH sensors, and electrochemical impedance spectroscopy probes. Through non-destructive, automated dynamic time-series monitoring of concrete, and by integrating multi-source parameters to construct a multi-dimensional evaluation system, this method avoids the shortcomings of traditional static testing, destructive sampling, single evaluation methods, and human error. It accurately quantifies the repair performance of microbial concrete, resulting in highly reliable evaluation results.

The invention discloses a special inspection device for turbonator rotor forgings and a use method thereof, and relates to the technical field of turbonator rotor forgings machining.The special inspection device comprises a transverse plate, a fixing block is fixedly connected to the center of the bottom of the transverse plate, a vertical plate is fixedly connected to the bottom of the fixing block, and a through groove is formed in the position, close to the bottom, of an inner cavity of the vertical plate; by means of mutual cooperation of the transverse plate, the eddy current detector, the motor, the pump machine and other structures, the device can not only conduct destructive sampling on the rotor forge piece, but also conduct non-destructive sampling on the rotor forge piece, and during non-destructive sampling, the sampling efficiency is greatly improved. The non-flannelette is placed in the second cavity in the fixing block, the second valve is rotated, the industrial alcohol in the first cavity in the fixing block enters the first cavity and wets the non-flannelette in the first cavity, and after the non-flannelette is wetted, the second valve is closed.

The invention discloses a method for judging the percentage elongation after fracture of TP347H austenitic heat-resistant steel based on magnetic detection. The method comprises the following steps: establishing a corresponding relation between saturation magnetization Ms detection of the austenitic heat-resistant steel and the content of a precipitated phase; respectively preprocessing the service pipe and the new pipe, and then detecting the relative permeability; establishing a corresponding relation between the relative permeability and the saturation magnetization Ms; and calculating the percentage elongation after fracture based on the relative permeability, and judging the service standard of the steel pipe according to the relative permeability. According to the method, the relative permeability of the austenitic heat-resistant steel after service is detected, and whether the elongation of the austenitic heat-resistant steel after fracture meets the standard or not can be judged according to the numerical distribution characteristics and the numerical value of the detection result. The method does not need destructive sampling or surface treatment on the sample, can keep the integrity of the austenitic heat-resistant steel, has the characteristics of low cost, simplicity and rapidness in operation and high precision, and can obviously improve the detection efficiency.

This application discloses a molecular marker linked to pepper pericarp thickness and its application. The molecular marker comprises a nucleotide sequence formed by an InDel mutation at nucleotide position 30027941 on chromosome 4 of the pepper genome. This molecular marker effectively addresses the shortcomings of conventional breeding methods, including the need for destructive sampling to determine pericarp thickness at fruit maturity, the significant variability in measurement results due to the influence of planting and management factors on pericarp thickness, and the inability to effectively distinguish between heterozygous and homozygous states at the target locus. This molecular marker effectively solves these problems, allowing for accurate and efficient prediction of pericarp thickness during the pepper seedling stage. This reduces the planting scale of breeding materials, lessens the workload of later phenotypic identification, facilitates rapid screening for superior target plants, accelerates the breeding process, and significantly improves breeding efficiency.

The invention provides a method for judging selenium-enriched shiitake mushrooms by using a micro-area X-ray fluorescence spectrum, belongs to the technical field of food nutritional ingredient detection and identification, and aims to solve the technical problems of destructive sampling and non-visualized element space distribution in the existing selenium-enriched shiitake mushroom detection technology. The method comprises the following steps: freeze-drying shiitake mushrooms to fix element distribution; selecting a plurality of detection points on the freeze-dried lentinus edodes slices, performing single-point detection by adopting a micro-area X-ray fluorescence analyzer, and preliminarily judging that the lentinus edodes are selenium-rich lentinus edodes according to the condition that Se Kalpha signals of the selected detection points obviously exceed a background value; and carrying out element surface scanning on the surface of the preliminarily judged selenium-rich mushroom by adopting a micro-area X-ray fluorescence spectrum analyzer, and finally judging whether the mushroom is the selenium-rich mushroom or not according to the condition that delta capp of the whole pileus area (containing gill) is greater than or equal to 4counts and delta stipe of the stipe area is greater than or equal to 3counts. According to the method, a'rapid identification-comprehensive characterization 'dual-mode discrimination model is innovatively established, the selenium-rich shiitake mushrooms and common shiitake mushrooms can be effectively distinguished, and a visual and multi-dimensional basis is provided for quality evaluation of the selenium-rich shiitake mushrooms.

The invention provides an arabidopsis thaliana root system alternating current impedance detection system and method based on a micro-fluidic chip, and relates to the technical field of alternating current impedance measurement. The system comprises a micro-fluidic chip, an AD5933 detection module, a single chip microcomputer and an upper computer. The micro-fluidic chip is formed by bonding a PDMS layer and a glass substrate, a channel for growth of an arabidopsis thaliana root system is arranged in the micro-fluidic chip, and a detection electrode is integrated on the substrate. Arabidopsis thaliana seeds are cultured in a chip channel, after root systems of the seeds grow to cover electrodes, an AD5933 module is used for applying small-amplitude alternating current signals and measuring root system impedance, and data are uploaded to an upper computer through a single-chip microcomputer to be processed. The method realizes in-situ, non-destructive and low-cost electrical property detection of the living arabidopsis thaliana root system, overcomes the limitation of traditional destructive sampling, can be combined with an optical microscope for synchronous morphological observation, and provides an efficient technical means for plant physiology research.