59results about How to "Detection time is short" patented technology

The invention provides a phase detection regulation and control system for an ultra-narrow-band Ku-band signal, and the system comprises a PL end which is used for carrying out the preprocessing of a plurality of paths of input Ku-band signals; the PS end is used for detecting the phases of the multiple paths of final baseband signals obtained through preprocessing to obtain a phase detection result and sending the phase detection result to the upper computer; the upper computer is used for generating a phase regulation and control instruction according to the phase detection result; and the phase shift control module adjusts the phase of the Ku wave band signal of the corresponding path. According to the method, multiple paths of narrowband signals can be synchronously extracted, phases of the narrowband signals can be analyzed, microsecond-level detection efficiency can be achieved, the LMS algorithm is introduced in the PL end processing process to extract narrowband target signals, a self-adaptive step length adjusting filter is introduced in the LMS algorithm, and detection precision is improved. The method has higher flexibility and adaptability, can effectively meet the processing requirements of different signal types in a complex environment, and improves the universality and applicability of a signal detection system.

The invention discloses a tab redundancy detection method and system, the system comprises a ray source, a ray detector, a tray used for containing a battery cell and a processor, the processor is connected with the ray source, the ray detector and the tray, the tray is located between the ray source and the ray detector, and the tray is provided with a rotating mechanism; the ray source is used for emitting rays to the battery cells on the tray; the tray is used for rotating through the rotating mechanism, so that the battery cell is inclined by a preset angle, and the preset angle is used for preventing an imaging path of a cathode tab in the battery cell from being interfered by an anode tab; the ray detector is used for collecting a tab perspective view in the battery cell after the battery cell is inclined, and the tab perspective view comprises the complete morphology of the cathode tab; and the processor is used for judging whether the battery cell has a tab redundancy phenomenon or not according to the tab perspective. As the cathode tab can be imaged only at one angle, the ray detector can synthesize the final tab perspective drawing only in several seconds, the detection efficiency is high, and the batch detection requirement of a production line can be met.

The invention discloses a single three-phase series-parallel micro-grid group island detection method based on improved Adaboost, and the method comprises the following steps: collecting sample data of different electrical characteristic quantities in a single three-phase series-parallel micro-grid group, which are measured at a point of common coupling (PCC); based on partial least squares (PLS), correlation analysis is carried out on various electrical characteristic quantities measured at a common coupling point, strong correlation electrical characteristic quantities are screened out, and a training set and a test set are formed; according to the method, an Adaboost learning device is improved on the basis of a mucus optimization algorithm (SMA) and a GSN weight learning mode, so that the classification capability is improved, the disturbance influence is weakened, and the detection time consumption is shortened. And constructing an island detection model of the microgrid group based on the improved Adaboost learner, and outputting an island detection result according to the real-time test set data at the PCC. According to the method, accurate island detection can be carried out without being affected by disturbance signals and the three-phase unbalance degree of the system, and the method has high anti-interference performance, accuracy and generalization ability.

The invention discloses a building electrical casing pipe blocking accurate point positioning device and positioning method. The method comprises the following steps: S1; firstly, a sliding assembly with a lifting rope is put into the electrical sleeve; s2; a detection assembly and an air blowing pump are sequentially screwed at the end part of the electrical sleeve; (S3); starting an air blowing pump, recording the rotating speed of the detection rotating wheel within a certain time, and recording; (S4); the movement distance of the sliding assembly is equal to the rotating speed of the detection rotating wheel in unit time. The positioning device comprises an electrical sleeve, the opening end of the electrical sleeve is sequentially connected with a detection assembly through threads, and a sliding assembly is movably arranged in the electrical sleeve. The air blowing pump is adopted to ventilate the interior of the electrical sleeve, the sliding assembly moves in the electrical sleeve by means of wind power, the movement distance of the sliding assembly is calculated by recording the product of the rotation duration of the detection rotating wheel and the rotation speed of the detection rotating wheel, then the blocking position of the electrical sleeve is accurately known, detection time is short, and detection efficiency is high. And the construction efficiency is effectively improved.

Embodiments of the present application relate to the technical field of human-computer interaction, and disclose a method and device for determining an interactive gesture and an electronic device. The method comprises the following steps: first, target component detection is performed; then, gesture detection and recognition are performed in a local area (around a boundary box) near the target component. In addition, for N gesture detection boxes (multiple users) in a current video frame, M target gesture detection boxes are selected therefrom to perform hand component positioning and gesture recognition processing, which can reduce detection time consumption and improve real-time performance. On this basis, the interactive gesture is determined according to the gesture detection result of the current video frame and the gesture detection results of a plurality of historical video frames, that is, gesture recognition is selectively performed on the user in each frame in a plurality of continuous video frames to determine the interactive gesture, which can reduce the computing power, reduce the time consumption, improve the real-time performance, and improve the accuracy and stability of the interactive gesture. That is, in the multi-user human-computer interaction scene, the interactive gesture can be accurately and timely determined.

The utility model relates to detection instrument technical field, concretely is detection kit for multiple immunosuppressants, including reagent box body, detachable multi -hole detection board and sample adding shunt cover, the array type detection card groove is equipped in multi -hole detection board, can freely plug in or plug out the micro -size detection chip of preloading different antibodies, sample adding shunt cover adopts the funnel type feed hole to connect multichannel transmission channel, through the sample is synchronously shunted to each array type detection card groove through the liquid distribution board, the medical silica gel buffer layer is arranged at the bottom of liquid distribution board and realizes dynamic seal, and the electric connection of cooperation chip bottom electrode contact and integrated bottom plate is completed electrochemical signal acquisition. This reagent box supports the user to select the detection item according to the need, and can complete multiple index synchronous detection in single sample adding, and the efficiency is improved obviously and the pollution risk is reduced.

The invention discloses a biosensor based on an ultraviolet light triggered bio-barcode release technology (OBCA) and construction and application of the biosensor. The biosensor comprises nucleic acid functionalized silver nanoparticles, nucleic acid functionalized magnetic beads and a CRISPR (clustered regularly interspaced short palindromic repeats) / Cas12a detection system, the DNA bar code modified on the surface of the silver nanoparticle contains a light cleavable linker, a CRISPR / Cas12a activation sequence and a target capture sequence I, and a DNA capture probe containing a target capture sequence II is fixed on the surface of the magnetic bead through biotin-streptavidin action. During detection, target miRNA mediates two capture sequences to form a sandwich compound, after magnetic separation and thermal denaturation elution, 365nm ultraviolet radiation releases DNA bar code fragments, and the Cas12a trans-cleavage fluorescence quenching reporter probe is activated to generate a signal. According to the method, nucleic acid amplification and reverse transcription are not needed, the detection limits of miR-21, miR-155 and mi-210 respectively reach 158.94 aM, 763.56 aM and 197.82 aM, single-base mismatch and precursor miRNA can be distinguished, the serum sample detection result is highly consistent with that of RT-PCR, and the method is suitable for high-sensitivity quantitative detection of miRNA.

This invention discloses a method and system for simultaneous analysis of multiple lipid indicators in fingertip capillary blood, relating to the field of chemical analysis. The method includes S1: micro-sample pretreatment of fingertip blood; S1.5: sample matrix interference pretreatment; S2: multi-channel parallel specific reaction; S3: multi-band spectral synchronous detection; S4: machine learning intelligent calibration and analysis; and S5: result output and quality control verification. This method and system achieves simultaneous detection of five core lipid indicators in fingertip blood samples in a short time, with low deviation and cross-interference rates between the detection results and venous blood biochemical detection, and high matrix interference inhibition rate. It also possesses advantages of portability, speed, and accuracy, solving the problems of low detection efficiency, limited applicability, and matrix interference affecting accuracy in existing technologies.

The present invention relates to the field of biotechnology, and in particular to the use of biotinidase in the preparation of reagents for detecting heart failure with preserved ejection fraction in diabetic patients. The present invention has found through research that biotinidase has high sensitivity and high specificity for predicting the occurrence of heart failure with preserved ejection fraction in diabetic patients, and preliminary cell experiments have shown that biotinidase has a significant protective effect on diabetes combined with heart failure with preserved ejection fraction. Therefore, the present invention applies biotinidase to the preparation of reagents for detecting heart failure with preserved ejection fraction in diabetic patients. When the reagent is used for the detection of heart failure with preserved ejection fraction in diabetic patients, it is simple to operate, can simplify the detection process, and help reduce the workload of medical staff; and the detection time is shortened and the cost is low; at the same time, it can also predict multiple subjects at one time, and can be used for large-scale population screening.

The utility model discloses a kind of detection devices for coal mine electromechanical equipment maintenance, belong to coal mine machinery detection equipment technical field, including base, rotatably connected with rotating table on the base, for carrying the coal mine electromechanical equipment to be detected;Detection mechanism, the detection mechanism includes liftablely connected on the base sliding frame, the sliding frame interval is located at the outside of rotating table, fixedly connected with vertical frame on the sliding frame, vertical frame is installed with vertical shift component, first paint surface thickness detector is installed in vertical shift component output end;Rotatably connected with connecting frame on the sliding frame.The utility model in, for camber detection, through rotating motor drive crossbeam does circular arc motion around rotating shaft, simultaneously in combination with the guidance limit of arc groove body and arc block, make second detector along camber radian form arc detection track, to meet the overall detection demand of multiple types of surface in coal mine electromechanical equipment maintenance.

The invention discloses a method and a system for detecting spinal cord injury degree based on terahertz spectrum, which specifically carry out analysis based on terahertz frequency domain spectrum, reasonably design a data analysis method to strengthen spectral characteristics, calculate refractive index, and utilize the relationship between the refractive index and absorption coefficient and blood fat content to realize effective detection of blood fat concentration of a sample. Finally, the targets of effective detection and long-term monitoring of spinal cord injury are achieved. Compared with traditional detection technologies such as biochemical detection, imaging examination and electrophysiological examination, the method has the advantages that the detection time is short, the cost is low, harmful ionization reaction cannot be caused to biological tissues, and the safety and the detection efficiency are higher.

This utility model relates to the technical field of pipeline inspection equipment, and in particular to a material inspection device for pipelines downstream of high-pressure bypass regulating valves. It features strong adaptability, high fit, and excellent automation, enabling efficient and accurate material inspection of pipelines downstream of high-pressure bypass regulating valves of different specifications and shapes, while reducing inspection costs and operational complexity. The device includes a main inspection unit, an adjustable probe assembly, an adaptive clamping mechanism, and a control module. The main inspection unit is electrically connected to both the adjustable probe assembly and the control module. The adjustable probe assembly is mounted on the adaptive clamping mechanism, and the control module is signal-connected to the adaptive clamping mechanism. The main inspection unit receives and analyzes the pipeline material inspection signals collected by the adjustable probe assembly, while the control module controls the movement of the adaptive clamping mechanism and the inspection parameters of the adjustable probe assembly.

This invention belongs to the field of sound-generating device technology, specifically a directional sound-generating device and its manufacturing process. It includes a folding mechanism, a height adjustment mechanism located below the folding mechanism, a rotating mechanism located at the top of the folding mechanism, an angle adjustment mechanism located at the top of the rotating mechanism, and a mounting mechanism located above the angle adjustment mechanism. A directional sound-generating body is fixed above the angle adjustment mechanism via the mounting mechanism. The rotating mechanism includes a fixed base, with a second motor fixedly connected to the left side of the top of the fixed base. A first gear is fixedly connected to the output end of the second motor, and a second gear is meshed with the right side of the first gear. This invention achieves lateral adjustment of the sound-generating device by controlling the rotation of the first gear with the second motor, which in turn drives the second gear to rotate the rotating frame. Vertical adjustment of the sound-generating device is achieved by controlling the up-and-down movement of the mounting frame with a telescopic rod. This solves the problem of traditional sound-generating devices requiring manual adjustment to change the direction of the sound source output, which is labor-intensive.

The invention discloses a laminated plate debonding defect nondestructive testing method based on non-simple harmonic excitation, which comprises the following steps: sweep frequency excitation is performed on a laminated plate to be tested, a speckle interference image of the laminated plate to be tested is acquired through a speckle interferometer, and non-simple harmonic waves such as square waves, triangular waves or pulses are adopted as sweep frequency excitation signals; before detection, a camera of the speckle interferometer is adjusted to be in a real-time subtraction mode; during frequency sweeping, observing a real-time subtraction picture, and when an annular stripe is detected, marking the stripe as the debonding position of the laminated plate; continuously increasing the excitation frequency and observing whether a new position of the real-time subtraction picture has an annular stripe, and if so, continuously marking; and continuously sweeping the frequency and detecting the stripes until the stripes do not appear, storing the picture marked with the defect position, and ending the detection. According to the method, non-simple harmonic excitation is adopted, so that the debonding defect detection of the laminated plate is short in time consumption and high in efficiency, missing detection can be reduced, and the effect is more obvious especially when multiple defects exist.

The invention provides a detection method of cooking-free premixed flour and a rapid ductility detection instrument of the cooking-free premixed flour. The method comprises the following steps: detecting an insoluble index, dissolving boiling-free premixed powder in water, centrifuging in a centrifuge tube with scales, and recording the volume of an obtained precipitate; ductility detection: mixing the cooking-free premixed powder with water in proportion to form a sample, kneading the sample into a ball after starch in the sample is completely gelatinized, and putting the ball into a beaker for later use; quantitatively taking the mixed sample by using a glass rod, and adhering the mixed sample between the two opposite sheets; the two sheets are attached to each other and stand for a period of time, and the thickness of the flattened sample and the diameter of the flattened sample are recorded; separating the two sheets by using uniform tensile force until the sample is snapped, and recording the tensile force peak value at the moment and the distance when the sample is snapped; and calculating to obtain a ductility parameter. The method is used for detecting the cooking-free premixed flour, whether the cooking-free premixed flour meets the detection standard or not is judged, operation is easy and convenient, and use is rapid.

The application discloses an artificial intelligence-based food colony detection analysis method and system, which comprises the following steps: performing gradient elution-layered filtration pretreatment on a food sample to be detected to generate a de-impurity colony sample; simultaneously performing colony microscopic image acquisition and near-infrared spectrum data acquisition on the de-impurity colony sample to generate initial multi-modal data; performing space-time calibration processing on the initial multi-modal data to generate space-time calibrated multi-modal data; performing multi-dimensional colony feature extraction and screening processing on the space-time calibrated multi-modal data to generate a strong correlation feature subset; performing AI double-branch attention fusion analysis processing on the strong correlation feature subset to generate a colony classification result and a colony concentration estimated value; and performing multi-reference system correction processing on the colony classification result and the colony concentration estimated value to generate a corrected detection result. The timeliness and reliability of the detection result are improved.

The application discloses a bridge influence surface identification method and device based on a new driving strategy of a mobile vehicle, a computer and a storage medium, and relates to the field of bridge structure safety detection.The application solves the problems of low calculation efficiency and low accuracy of existing identification technology without considering the efficiency and accuracy of loading on various bridges.The method comprises the following steps: setting a driving path of a vehicle, and obtaining a plurality of influence lines with a lateral distance of a vehicle width; collecting a bridge dynamic response; constructing an influence surface identification model according to the bridge dynamic response and the plurality of influence lines with the lateral distance of the vehicle width; obtaining a plurality of longitudinal influence lines of the bridge according to the influence surface identification model with singular value decomposition; and obtaining a fitted bridge influence surface by using a modified Hermite interpolation to process the plurality of longitudinal influence lines of the bridge.The application is applied to the field of bridge health monitoring.

The embodiment of the application provides a kind of based on dynamic feedback's organic electroluminescence uniformity detection method and system, belong to organic electroluminescence uniformity detection field;The method comprises after initializing detection system, and calibrating reference baseline, acquisition standard plate reference image;Design first sparse sampling template;First sampling is carried out using first sparse sampling template and reconstruction algorithm, and the reconstruction full-width image of organic electroluminescence device under each waveband is obtained, and first light emitting uniformity evaluation is carried out;Mark abnormal light emitting area, dynamically adjust sampling strategy, using second sparse sampling template carries out second sampling, updates the reconstruction full-width image under each waveband, and carries out second light emitting uniformity evaluation, and exports organic electroluminescence uniformity detection report.The application is improved by intelligent sparse sampling and closed-loop feedback technology Organic electroluminescence uniformity detection efficiency and accurately locate defect area, provide efficient solution for production quality control.

The touch panel detection device comprises a metal probe, a detection circuit, an indicator light and a USB interface, the metal probe is used for collecting a self-sweep frequency signal of a touch panel, the detection circuit is connected with the metal probe, receives the self-sweep frequency signal and carries out amplification and low-frequency filtering on the self-sweep frequency signal, and the indicator light is connected with the detection circuit. The detection circuit receives the amplified and low-frequency filtered signal to drive the indicator light to be turned on or turned off, and a ground wire and a power line of the USB interface are connected with the detection circuit; wherein when the USB interface is connected with electronic equipment with a touch panel, the electronic equipment supplies power to the detection device.

The invention discloses a method for quickly detecting the formaldehyde content in tilapia and its application, comprising the following steps: S1. crushing the tilapia to be tested, adding potassium hydrogen phthalate solution and acetonitrile aqueous solution, and vortexing; S2. performing a derivatization reaction; S3. preparing a liquid to be tested; S4. performing liquid chromatography-triple quadrupole / linear ion trap composite mass spectrometer detection, obtaining the peak area of ​​formaldehyde, and calculating the content of formaldehyde in the tilapia to be tested according to the standard curve of formaldehyde. The method of the present invention is simple to operate, short in detection time, high in detection efficiency, and can accurately detect the formaldehyde content in tilapia, with a detection limit of 0.00109mg / kg, a spiked recovery rate of 91.4%-103%, a precision of less than 3.96%, a high precision and a low detection limit, so the detection method of the present invention is suitable for accurate and rapid qualitative and quantitative detection of formaldehyde contained in tilapia.

The utility model discloses a kind of detection tool of air conditioner compressor valve sheet, it is related to compressor valve sheet technical field, including detection table, the vertical fixed round bar of detection table top center place, round bar and the center hole of air conditioner compressor valve sheet are matched, detachable auxiliary plate is installed on the upper end of round bar, square slot is opened in the upper end of round bar, clamping block is fixed in the bottom of auxiliary plate, clamping block and square slot are matched, plug-in structure for dropping tube to drop refrigerating machine oil to the surface of air conditioner compressor valve sheet is slidably installed on auxiliary plate.The utility model is guided to the drop tube by the guiding effect of jack and the sliding adjustment of sliding block and sliding slot, oil drop point position deviation is very small, the oiliness detection of different positions on the surface of air conditioner compressor valve sheet can be realized, and oil drop height is consistent, eliminate oil drop initial kinetic energy difference, transparent round plate and scale concentric circle can directly read oil drop diffusion diameter, without additional measuring tool, single piece detection time consumption is shortened, and detection efficiency is improved.

The invention belongs to the technical field of high-throughput detection, and particularly relates to a high-throughput detection method for a respiratory syncytial virus vaccine serum neutralizing antibody, which comprises the following steps: carrying out neutralization reaction on a diluted monoclonal D25 antibody and a respiratory syncytial virus diluent, adding the neutralized monoclonal D25 antibody into cultured cells for adsorption, discarding an adsorption liquid, washing, and drying to obtain the high-throughput detection method for the respiratory syncytial virus vaccine serum neutralizing antibody. A virus culture solution is added, cultured cells are fixed, a diluted monoclonal 101 antibody is added for reaction, then a diluted FITC fluorescent secondary antibody is added, photographing, analysis and counting are performed, software is used for data processing and result judgment, reading is performed through an instrument in the whole process, manual subjective judgment is few, result calculation is more scientific and reliable, and the method is suitable for large-scale popularization and application. The method has good correlation with a gold standard method.

The invention discloses a vehicle mobile phone volume change track detection method, device and equipment and a storage medium. According to the method, a Python automation script is used for controlling terminal equipment to execute a sound detection process, a target sound source is automatically triggered, a volume gear is adjusted, a sound scene is switched, and an operation environment is provided for sound data collection; according to an operation environment, a browser sound collection interface is synchronously called to capture physical parameters of loudspeaker sound of terminal equipment in real time, original collection data are obtained, the original collection data are calibrated and filtered, standardized sound data are generated, and the standardized sound data are displayed in real time through a visual interface. And after the detection is completed, the full-amount detection data is automatically packaged and stored according to the preset format, so that the full-automatic operation of the volume change track detection of the vehicle-mounted terminal and the mobile phone can be realized, the detection efficiency is remarkably improved, the subjective error of manual operation is eliminated, the environmental noise interference is effectively overcome, and the objectivity and accuracy of the detection data are ensured.

This invention relates to the field of airport operation management technology, specifically to a method, apparatus, and equipment for real-time detection of aircraft stand conflicts. It constructs a mutual exclusion bitmap matrix based on a pre-acquired list of mutually exclusive edges and bit mapping relationships between stand positions; encodes the current occupancy status of all stand positions into a binary integer occupancy bitmap; traverses the occupancy bitmap from low to high bits, and for each occupied stand i, performs a bitwise AND operation between the mutual exclusion bitmap and the occupancy bitmap to obtain a set of stands mutually exclusive with and occupied by stand i; extracts stand positions with stand numbers greater than i from this set to obtain conflict pairs of stand i, and integrates them into the stand conflict detection result. This solution achieves O(1) time complexity conflict detection by encoding stand occupancy status into a binary bitmap and combining it with a pre-constructed mutual exclusion bitmap matrix. It boasts high detection accuracy and significantly reduced detection time, meeting the requirements of high-concurrency scenarios.

This invention provides an automatic defect detection device for internal defects in a honeycomb ceramic carrier, mainly comprising: a main frame; high-transparency optical glass, which is disposed on the upper surface of the main frame as a carrier support platform; a high-brightness light source, which is disposed below the high-transparency optical glass; a vision camera, which is an industrial area array camera capable of uniform, high-precision reciprocating scanning motion along the length of the carrier controlled by a servo module; a lens, which is disposed below the vision camera; a control unit configured to control the movement of the vision camera and acquire continuous transmission images of the entire length of the carrier with high overlap; and an image processing unit configured to perform defect analysis on the acquired images and output the analysis results. This device, through a special optical imaging system and image processing algorithm, achieves non-contact, high-precision, and automated detection of internal defects such as blockages and cracks in honeycomb ceramic carriers.

The invention discloses a meat freshness rapid detection device, and belongs to the technical field of food nondestructive detection. The device aims at solving the problems that existing detection equipment is poor in portability and difficult to use on site, the detection range is limited due to single excitation wavelength, and the detection process depends on manual operation and is insufficient in intelligence. According to the technical scheme, the device is characterized by comprising a sample placement area, an annular multi-wavelength excitation light source module, a spectrum acquisition module, a single-chip microcomputer module, a Bluetooth module and a power supply and discharge module which are integrated in a device shell; the external intelligent terminal is provided with detection analysis software, and the software controls the excitation of the LED lamp beads with specific wavelengths through the Bluetooth module, automatically identifies the type of the freshness indication label based on the collected spectral characteristics, and calls a corresponding prediction model to calculate the freshness index. The device is mainly used for carrying out rapid and portable on-site detection on meat samples with freshness indication labels.

The invention discloses seamless splicing intelligent interactive screen appearance detection equipment and a detection method, and relates to the field of interactive screen detection, the seamless splicing intelligent interactive screen appearance detection equipment comprises a fixed table and a CCD detection assembly installed on the top of the fixed table; electric push rods are fixedly installed on the periphery of the bottom of the fixing table, the output ends of the electric push rods are fixed to the side wall of the shielding part, a fixing rack is fixed to one side of the shielding part, the output end of a fixing motor is connected with a driving gear, and the outer side of the driving gear is connected with a rotating gear in an engaged mode; the lifting part is used for adjusting the angle of the seamless splicing intelligent interaction screen adsorbed by the top of the negative pressure suction cup. According to the seamless splicing intelligent interaction screen appearance detection equipment and detection method, the electric push rod drives the shielding part to be closed, and the situation that a traditional clamp shields a detection area is avoided; the elastic air cushion is extruded in the closing process of the shielding part; the shielding part is closed to extrude the elastic air bag, the light supplementing plate is driven by the adjusting mechanism to rotate within the range of 0-40 degrees, and precise detection is achieved in cooperation with the CCD detection assembly.

The invention provides a hyper-branched DNA rolling circle amplification-based virus detection sensor and a test method, the hyper-branched DNA rolling circle amplification-based virus detection sensor comprises a carbon-based field effect transistor biosensor, the carbon-based field effect transistor biosensor is a P-type device and sequentially comprises a substrate S I layer, an S < 2 > layer, a CNT channel layer and an HfO2 dielectric layer from bottom to top, and a source electrode and a drain electrode are symmetrically arranged on the S < 2 > layer; wherein the surface of the CNT channel layer is modified and fixed with a primer, and the primer is used for carrying out HRCA reaction on the interface of the channel layer to cause the current rise of the device; the biosensor based on the carbon-based field effect transistor is used for detecting viruses, the device reaches the micron level, batch production is easy, cost is low, carrying is convenient, the ultrasensitivity of the carbon-based field effect transistor to surface charges is utilized, a large number of negatively charged DNA molecules can be generated through the HRCA reaction, the detection process is short in time consumption, and the detection efficiency is high. And the defect of long detection time caused by low concentration of DNA of a virus sample in the existing detection technology is overcome.

The present invention provides specific primers and a visual detection method for rapid detection of chestnut blight pathogen based on RAA-CRISPR / Cas12a, wherein the specific primers include gRNA primers and RAA primers for specific detection of chestnut blight pathogen. The visual detection method for detecting chestnut blight pathogen of the present invention has the characteristics of simple operation, rapid detection, low cost, high sensitivity, strong specificity and visualization. The RAA amplification method is combined with the CRISPR / Cas12a detection method to detect chestnut blight pathogen, and visual detection is achieved through an ultraviolet gel imager and a Cas12 / 13 special nucleic acid detection test strip, which can realize on-site rapid detection of chestnut blight pathogen, provide an effective method for rapid detection and early diagnosis of chestnut blight pathogen, and provide guidance for monitoring, early warning and precise prevention and control of chestnut blight.

The invention relates to gap measurement of an aviation product body structure and a positioning tool, in particular to a digital detection method for a gap between an aircraft fuel tank bearing beam and a tool, and belongs to the technical field of aircraft assembly detection. The method has the advantages that the detection time is short, the detection efficiency is high, factors such as human subjective judgment and operation methods are avoided, intelligent measurement of the fuel tank bearing beam and positioning tool butt joint area gap can be achieved, and the corresponding process measurement requirements are met. According to the detection method, a matched measurement device is designed, high-precision detection equipment such as a pressure sensor and an angle sensor is adopted, electronic control executing mechanisms such as a servo sliding table, an electric telescopic rod and a stepping motor are applied, and all-directional measurement of the folding and overlapping area is achieved after a programmed algorithm is carried out.