87 results about "Field detection" patented technology

This application relates to the fields of SAR signal processing and marine remote sensing applications, and provides a method and apparatus for sea surface current field inversion based on electromagnetic vortex wave radar data. The method determines the Doppler spectrum using electromagnetic vortex wave radar image data, obtains the measured frequency position of the trough feature point in the Doppler spectrum, and determines the theoretical frequency position using the position and angle of the two main lobes and the angle of the trough feature point in the radar antenna pattern. Then, the difference between the measured frequency position and the theoretical frequency position is used to obtain the anomalous frequency offset. Next, the Doppler frequency offset caused by wind and wave motion is removed from this anomalous frequency offset to obtain the target Doppler frequency offset. Finally, the radial velocity of the sea surface is calculated using the Doppler frequency offset, thus realizing sea surface current field inversion. This effectively expands the applicability of the Doppler frequency shift-based ocean current inversion method and improves the application potential of electromagnetic vortex wave radar in sea surface current field detection.

The application provides an ultrasonic field detection device and an ultrasonic emission detection system. The detection device comprises a container for containing a sound guide medium, an ultrasonic field detection unit, a rotating mechanism and a processing unit. The bottom of the container is provided with a mounting position. Each group of ultrasonic field detection units comprises a light emitting unit and a camera unit oppositely arranged on both sides of the container along an optical axis. The optical axis is orthogonal to the axis of the ultrasonic field generated by the ultrasonic generation unit. At least one group of ultrasonic field detection units is rotatable to a plurality of different stations around the axis of the ultrasonic field under the action of the rotating mechanism. The light emitting unit is used for emitting detection light at the plurality of different stations. The camera unit is used for correspondingly collecting image information of the detection light deflected through the ultrasonic field at the different stations. The processing unit generates a three-dimensional image of the ultrasonic field based on the collected image information at the plurality of different stations. Thus, the ultrasonic field emitted by the ultrasonic emitter can be detected non-destructively.

This invention belongs to the field of medicinal herb testing technology. It proposes a method and system for analyzing traditional Chinese medicine (TCM) extracts based on cross-platform spectral and feature fusion. The method involves acquiring a portable near-infrared spectrum of the TCM extract to be tested, converting it into a reference platform style spectrum using a pre-trained cross-platform spectral generation model. Subsequently, the original and generated spectra are input into two independent branches of a feature fusion module, extracting original and generated features and scoring them separately. Based on the scores, normalization is performed to obtain fusion weights, and the two types of features are weighted and fused to form a comprehensive feature. Finally, the comprehensive feature is input into a quantitative analysis modeling module to predict the content of key quality markers in the TCM extract. This method effectively combines the advantages of on-site detection with the high precision of laboratory-grade spectroscopy, significantly improving the accuracy and reliability of online quantitative analysis of TCM extracts.

The utility model discloses a pressure gauge on -the -spot detection connector relates to pressure gauge detection technical field, and its technical key points are: including main part, the fixed connection of main part top has the extension tube, and the port of extension tube is rotatably connected with the internal thread pipe through the annular bearing, and the internal thread pipe is used for with the induction end thread connection of pressure gauge, and the rotation drive assembly for driving the internal thread pipe positive and negative rotation is arranged to the main part one side internal thread pipe, and the fixed connection of main part one side has the external thread pipe, and the external thread pipe is used for with the pressurizing end thread connection of pressure gauge detector, and the through cavity is seted up between the external thread pipe and extension tube of main part, and the through channel of pressure relief is penetrated to the through cavity one side of main part, and the inner thread is arranged to the pressure relief channel inner wall, and the plug is threadedly connected to the pressure relief channel, this application can help to carry out on -the -spot detection, improve and connect or the efficiency when relieving the connection of large -scale pressure gauge.

The application relates to the technical field of semiconductor front-end detection, and discloses a dark-field detection system, specifically a detection system and a defect detection device. In the technical scheme provided by the application, the loading or unloading of an adjusting mirror group on the propagation path of an incident light beam is controlled to form oblique incident light beams and vertical incident light beams with different incident angles, the adjustment of different incident modes of the incident light beam is realized, and one main incident light beam is shared by the oblique incident light beams and the vertical incident light beams, so that the redundancy of the system is reduced. In addition, a focusing objective lens which can be synchronously controlled with the adjusting mirror group is arranged, the position change of the focusing objective lens on the optical axis of the incident light beam is controlled to realize the adjustment of the corresponding focal lengths of the oblique incident light beams and the vertical incident light beams, and the optical paths of the oblique incident light beams and the vertical incident light beams are kept consistent.

The utility model discloses a convenient receipt's highway bridge field detection is even degree measuring device, including bearing seat, the opposite corner of bearing seat bottom end all rotates and is equipped with universal wheel, the both sides of bearing seat bottom all are fixedly connected with slide rail, two the side of mutual approach of slide rail all movably equipped with mobile seat, two the side of mutual of mobile seat away all are fixedly connected with the slide strip of sliding connection in slide rail, two the side of mutual of mobile seat approach middle all are fixedly connected with support plate, and the support plate on both sides all are fixedly equipped with a plurality of slidingly penetrating support plate's test rod, and the bottom of each test rod all is fixedly connected with test wheel. The utility model discloses a gear meshing in both sides when rotating, and further makes both sides rack respectively drive mobile seat to move to the side of mutual away, to be able to change the working length of two sides mobile seat combination, makes the device can be applicable to the highway bridge of different width.

The laser detection device supporting multiple detection modes according to the above embodiment, the control unit obtains the current detection mode, in the dark field detection mode, the control unit measures the first detection information and the second detection information through the first optical path unit, the second optical path unit, the first detection unit and the second detection unit; in the fluorescence detection mode, the control unit measures the third detection information and the fourth detection information through the first optical path unit, the first detection unit and the third detection unit. The technical scheme can automatically realize two detection modes, i.e. the dark field detection mode and the fluorescence detection mode, through the control of each unit in the device. The scattering light intensity distribution can be analyzed through the first detection information and the second detection information, the fluorescence intensity distribution can be analyzed through the third detection information and the fourth detection information, so as to obtain the surface features of the object to be detected, and the purpose of detecting the surface quality of the object to be detected is achieved.

The application relates to the technical field of semiconductor front-end detection, and discloses a dark-field detection system, specifically a detection system and a defect detection device. In the technical scheme provided by the application, the loading or unloading of an adjusting mirror group on the propagation path of an incident light beam is controlled to form oblique incident light beams and vertical incident light beams with different incident angles, the adjustment of different incident modes of the incident light beam is realized, and one main incident light beam is shared by the oblique incident light beams and the vertical incident light beams, so that the redundancy of the system is reduced. In addition, a focusing objective lens which can be synchronously controlled with the adjusting mirror group is arranged, the position change of the focusing objective lens on the optical axis of the incident light beam is controlled to realize the adjustment of the corresponding focal lengths of the oblique incident light beams and the vertical incident light beams, and the optical paths of the oblique incident light beams and the vertical incident light beams are kept consistent.

This invention provides a sensor and its preparation method for detecting aflatoxin B1, belonging to the fields of analytical chemistry and food safety detection technology. The sensor includes a fluorescence quenching unit and a molecular recognition and signaling unit. The fluorescence quenching unit is an amino-functionalized zirconium-based metal-organic framework material UiO-66-NH2. The molecular recognition and signaling unit is a specific nucleic acid aptamer for aflatoxin B1, one end of which is covalently modified with a fluorescent dye. The nucleic acid aptamer binds to the surface of UiO-66-NH2 through adsorption. In the absence of aflatoxin B1, the fluorescence is quenched; in the presence of aflatoxin B1, the nucleic acid aptamer binds to the target analyte and dissociates from the UiO-66-NH2 surface, restoring fluorescence. This invention constructs a fluorescence "turn-on" sensor based on the UiO-66-NH2 / TAMRA aptamer, possessing both high sensitivity and specificity. Through visualization hydrogel technology, it achieves low-cost, rapid, and on-site detection of aflatoxin B1 in complex matrices.

The application discloses a ginseng flower and seed lightweight field detection method based on RT-DETR improvement, and belongs to the field of agricultural intelligent detection and deep learning application.The application takes RT-DETR as a baseline model, and makes targeted improvements from three aspects of backbone network, backbone-neck feature interaction and neck network downsampling in view of problems such as complex environmental interference, small target feature sparsity and difficulty in edge deployment of the model in field detection of ginseng flower, green seed and red seed.The model lightweight design is realized, the anti-interference ability and detection precision of the model to the complex field environment are improved, and the real-time detection demand of edge equipment in the field is met.The training of the improved model is completed, the model is deployed on a JetsonOrinNX edge computing platform, end-to-end real-time detection of ginseng flower, green seed and red seed in the complex field environment is realized, core visual technology support is provided for intelligent picking and field fine management of ginseng, and the application has important engineering application value for promoting the automatic and intelligent upgrading of the ginseng industry.

The application discloses a kind of time correction method and system for ensuring the validity of electric energy meter period electric quantity, comprising: judging whether electric energy meter needs to be corrected, obtains the determination result;When the determination result indicates that electric energy meter needs to be corrected, determine the time correction strategy;Based on the time correction strategy selected and the preset time interval for obtaining electric energy meter period electric quantity, electric energy meter is time corrected.Therein, the time correction strategy includes: point-to-point time correction strategy and broadcast time correction strategy.The method of the present application can realize the clock correction of gateway electric energy meter while ensuring that period electric quantity is not lost, ensure the effectiveness and uniqueness of electric energy meter period electric quantity while carrying out electric energy meter clock time, ensure the legality of electric energy metering, ensure the fairness and justice of electric power trade;The method of the present application can be applied to electric energy meter acquisition master station at all levels, and the minute-level time correction of various gateway and user electric energy meters is realized through the master station;It can also be applied to electric energy meter field inspection equipment, and the time correction of electric energy meter is realized through field detection.

This invention relates to a method for on-site detection of nitrate nitrogen, belonging to the field of water quality testing and monitoring technology. The detection method includes the following steps: collecting a test sample using a water sampler, filtering the sample, mixing the filtered sample with an indicator, and then performing a colorimetric reaction; during the colorimetric reaction, adding concentrated sulfuric acid, deionized water, and a 30-35% sodium hydroxide solution sequentially with the test sample; after the above steps are completed, measuring the absorbance value, and calculating the nitrate nitrogen concentration in the test sample using a standard linear equation. The water sampler and detection method of this invention have high precision and accuracy, and can be used for rapid on-site quantitative detection of nitrate nitrogen concentration in water.

The application provides a point-type combustible gas detector field detection device and method, and belongs to the technical field of gas detector detection. The point-type combustible gas detector field detection device and method comprise a detector body and a telescopic rod, the top of the telescopic rod is hingedly connected with a detection cylinder, the inside of the detection cylinder is provided with a state detection mechanism, the state detection mechanism comprises a top cylinder and a push-pull electromagnet, the top cylinder is fixedly arranged in the inside of the detection cylinder, and the top of the top cylinder is provided with an opening. The state detection mechanism is arranged, when the detection head normally works, the standard gas is subjected to flameless combustion under the action of a catalyst and generates a resistance step, so that the green light on the outer wall of the detection cylinder is turned on; if the standard gas does not normally combust, no resistance change is generated, the push-pull electromagnet does not work, and the red light microswitch and the red light electrically connected with the outer wall of the detection cylinder are arranged, so that the red light is turned on.

The application provides a portable film-forming amine on-site detection device, and relates to the technical field of water quality detection.The device comprises a box body, a liquid path cabin, an optical dark box cabin and a battery control cabin are formed in the box body; a sampling and pretreatment module, a reagent supply and metering module, a reaction mixing and timing module and a cleaning and waste liquid module are arranged in the liquid path cabin; an optical detection module is arranged in the optical dark box cabin; a power supply and a control interaction module are arranged in the battery control cabin.The sample introduction, reagent quantitative injection, mixing reaction, optical detection and cleaning and liquid discharge are integrated, the on-site automatic detection of the film-forming amine concentration is realized, no organic solvent is needed, the operation is simple, the detection is rapid, and timely and reliable concentration feedback can be provided for the accurate dosing of the film-forming amine.

This application discloses a method, apparatus, equipment, and storage medium for transformer risk detection. It establishes a three-dimensional finite element model corresponding to the transformer under test and solves for the electric field, flow field, and temperature field of the three-dimensional finite element model. Based on the electric field, flow field, and temperature field, it calculates the comprehensive risk value of each voxel. A risk heat map is generated based on the comprehensive risk value. High-risk voxels are selected from the risk heat map, and each high-risk voxel forms a first-risk candidate region. The first-risk candidate regions are comprehensively screened to determine each high-risk region. Risk location is then performed on the transformer under test according to each high-risk region. This application avoids the coarseness problem of single-field detection by solving for the electric field, flow field, and temperature field, and then combining these fields to calculate the comprehensive risk value of each voxel to determine each high-risk region. The high-risk regions are then used to locate risks on the transformer under test, thus improving detection accuracy.

The utility model relates to the field of field bird sample collection technology, specifically disclose a kind of sample collection device for field bird pathogen detection, including collection platform, the bottom of collection platform is equipped with support seat, rotating mechanism is equipped on support seat, the bottom of collection platform is connected with rotating mechanism, the bottom of support seat is equipped with support rod, the middle of collection platform top is equipped with feeding trough, the upper end of support seat one side is equipped with support plate, the side of collection platform is equipped with mounting rod, the bottom of mounting rod is connected with support plate, sampling mechanism is equipped on collection platform, the side of mounting rod close to collection platform is equipped with sampling scraper.

This invention discloses a safety assessment system and method for pressure-bearing components based on nonlinear ultrasound, belonging to the field of component safety assessment technology. The invention controls a robotic arm to drive an automatic probe to acquire nonlinear signals; establishes a mapping benchmark library and calibrates the background nonlinear threshold; divides the detection area of ​​the pressure-bearing component under test into a grid, and acquires the original field detection signal corresponding to each grid unit; removes nonlinear interference from each original field detection signal and calculates effective nonlinear parameters; based on the effective nonlinear parameters and the background nonlinear threshold, filters out abnormal candidate regions; for all abnormal candidate regions, inversely calculates the equivalent emission source parameters of the abnormal nonlinear signals; based on the three-dimensional spatial coordinates of the equivalent emission source parameters, determines the abnormal location region and outputs the location characteristics of the abnormal location region; trains a safety assessment model, inputs the location characteristics into the safety assessment model, and calculates the safety assessment result of the pressure-bearing component.

This invention discloses a method for visually measuring the wind speed of an airflow field. The measurement method includes six steps: placing a constant-power electric heating plate with a temperature higher than that of the airflow in the path of the airflow to be measured; using a thermal imager to photograph the airflow in front of the constant-power electric heating plate to obtain a thermal image of the temperature distribution of the constant-power electric heating plate during heat exchange; exporting the temperature values ​​from the image; using a hot-wire anemometer to detect the air speed at a specific point; fitting a correlation equation using the temperature and velocity values ​​at the specific point; exporting the temperature and coordinate values ​​of N or all pixels in the temperature distribution image of the electric heating plate, and substituting them into the correlation equation to obtain the velocity values ​​at each point in the airflow field. This allows for a direct visualization of the velocity distribution and range of the measured airflow field. This invention can accurately acquire the velocity field of the airflow, and the method is applicable to the velocity field detection of various complex airflows, and can accurately determine the diffusion range of a gas jet.

This invention provides an intelligent detection device for effective prestress in prestressed tendons and its usage method, belonging to the field of engineering testing and measurement technology. The detection device includes a load-bearing stabilization module and a stabilizing seat placed inside the lower side of the load-bearing stabilization module, as well as a prestress testing module slidably connected to the upper part of the load-bearing stabilization module. This invention can achieve automatic and accurate positioning through the linkage of the load-bearing stabilization module and the guide stabilization module. The centering module ensures stable centering of the prestressed tendons. Combined with the synchronous acquisition of force sensors and displacement sensors and the algorithm analysis of the intelligent detection host, it realizes rapid and high-precision intelligent detection of prestress values. At the same time, the anti-slip rod module provides active safety protection. The modular design of the overall device significantly improves the adaptability, safety and efficiency of on-site testing.

Systems and methods are disclosed to receive a training data set comprising a plurality of document images, wherein each document image of the plurality of document images is associated with respective metadata identifying a document field containing a variable text; generate, by processing the plurality of document images, a first heat map represented by a data structure comprising a plurality of heat map elements corresponding to a plurality of document image pixels, wherein each heat map element stores a counter of a number of document images in which the document field contains a document image pixel associated with the heat map element; receive an input document image; and identify, within the input document image, a candidate region comprising the document field, wherein the candidate region comprises a plurality of input document image pixels corresponding to heat map elements satisfying a threshold condition.

This invention relates to the field of garment fabric testing technology and discloses a garment fabric tensile strength testing device, comprising a left outer ring and a right outer ring, the bottom of which are rotatably connected. Force sensors are evenly distributed on the outer sides of the left and right outer rings. The device also includes: a central detection port located at the notch between the tops of the left and right outer rings; a power assembly located between the left and right outer rings; and a central detection structure connected to the output end of the power assembly. This invention, by using a power assembly to drive the left and right outer rings to contract and rotate outwards, not only allows for easy removal when not in use but is also portable, enabling on-site testing and improving testing efficiency. Furthermore, the central detection structure can be used independently for tension testing, enabling both tension and strength testing, greatly increasing its practicality.

The application discloses a rapid molecular detection method for a His-170-Pro mutation of a green dogtail grass ALS gene, and belongs to the technical field of gene mutation detection. First, a DNA sample of the green dogtail grass is extracted, then LAMP specific primers designed according to a resistant mutation site of the ALS gene are used for constant-temperature amplification, a fluorescent dye is added into the amplification product, the fluorescent intensity change is observed under ultraviolet light, and / or the amplification product is subjected to agarose gel electrophoresis analysis, so that the rapid molecular detection of the His-170-Pro mutation of the green dogtail grass ALS gene is realized. The application realizes rapid, efficient and visual detection of the target nucleic acid, overcomes the defects of time-consuming, laborious, high cost, high dependence on instruments and equipment, complex procedures, long detection period and accuracy easily affected by operation in the prior art ALS-resistant green dogtail grass His-170-Pro mutation identification and detection method, and can greatly improve the field detection efficiency of the resistant green dogtail grass.

The application belongs to the technical field of plant disease detection, and particularly relates to a primer, a probe, a kit, a method and application for detecting the Fusarium oxysporum f. sp. multivorum based on RPA-LFD technology, a nucleotide sequence of a forward primer in the primer group is shown as SEQ ID No. 1, a nucleotide sequence of a reverse primer is shown as SEQ ID No. 2, and a nucleotide sequence of the probe is shown as SEQ ID No. 4. The application adopts the RPA-LFD method to detect the Fusarium oxysporum f. sp. multivorum for the first time, has the characteristics of strong specificity, high sensitivity, rapidness, convenience, and independence on large-scale instruments and equipment, and can be applied to field detection of the wild Cotinus coggygria sample.

This utility model belongs to the field of ground penetrating radar technology, and particularly relates to a foldable damping shock-absorbing trolley for ground penetrating radar. The trolley of this utility model adopts a novel structural design, including a foldable frame (1), four wheels (2) installed at the bottom of the frame, and an adjustable tablet clip (7) installed at the top of the frame. The foldable frame (1) is folded by a 90° hinge structure (5), a connecting rod (11) and a folding locking screw (6), reducing storage space; the bottom of the frame is equipped with four sets of bottom shock-absorbing components (including hooks (9), damping springs (8) and height adjustment nuts (3)), which absorb vibration energy through spring deformation, avoid radar bumps affecting detection data, and can adjust the height of the ground penetrating radar from the ground to ensure the stability of field detection.