40results about How to "Addressing the Impact of Detection" patented technology

The invention discloses a computer vision-based real-time detecting and tracking method for an electric power transmission circuit of an aircraft in a complicated natural environment background. The method comprises the steps of: firstly extracting a pixel point cloud of the electric power transmission circuit by using an anti-noise gradient image and a maximum between-cluster variance algorithm; then screening detected straight segments in a Hough space by utilizing a K-means algorithm; and tracking and detecting according to the straight segment information detected by previous frame of video image by using a Lalman filter. The method has the advantages that: the influence of illumination on the detection of the electric power transmission circuit is eliminated, the detection accuracy of the electric power transmission circuit is improved, the detection time is shortened, the workload of inspecting workers is relieved, the inspecting efficiency is improved, and the phenomenon of the missed detection of the electric power transmission circuit in the inspection process is avoided.

The invention discloses a method for detecting salmonellas in dehydrated garlic products by adopting the immunomagnetic separation technology. The method comprises the following steps: (1) adding garlic powder into sterilization diluent, obtaining filter residues through filtering by a film filter bag after homogenization; (2) oscillating and washing the residues by the sterilization diluent for three times, mixing washing liquid of the three times; (3) oscillating salmonella immunomagnetic bead buffer solution and the mixed washing liquid; (4) performing centrifugal separation to obtain centrifugation sediment; (5) adding buffer peptone water enrichment broth into the centrifugation sediment and culturing for 24 hours; and (6) taking the culture solution, adding selenite cystine enrichment broth for enrichment culture, and using the VIDAS system to detect the salmonellas in the dehydrated garlic products. According to the invention, the immunomagnetic separation technology is utilized to realize fast detection of the salmonellas in the dehydrated garlic products, and the technology has the advantages of high specificity and high sensitivity.

The invention provides a tank cover visual detection and positioning method which comprises the following steps: a target identification step: carrying out template matching on a tank cover image to obtain a region of interest; a preliminary positioning step: carrying out contour matching on the obtained region of interest to obtain a regular hexagonal template, and reducing a detection region; an accurate positioning step: performing threshold segmentation according to gray characteristics of the center of the tank cover, and extracting a central hole as the center of the tank cover; and a pose resolving step: resolving a two-dimensional coordinate of the center of the tank cover under a world coordinate system according to the calibrated pose relationship, and fusing the two-dimensional coordinate with data obtained by the height sensor to obtain a three-dimensional coordinate of the center of the tank cover under the world coordinate system. According to the method, system and device, the templates under different illuminance are stored in advance, so that a complex algorithm is avoided, the detection requirements under different environments can be met, the influence of illumination conditions on detection is solved, the detection range is reduced twice through two different methods of template matching and contour matching, and the center of the tank cover can be detected more accurately.

The invention discloses a chassis component which comprises a chassis and a temperature and humidity sensor. The chassis component is characterized in that the temperature and humidity sensor is mounted on the chassis instead of an evaporator in the prior art; an air vent ventilating with the outside is formed in the chassis; and the temperature and humidity sensor obtains temperature and humidity parameters of air through acquiring temperature and humidity at the air vent. A mounting position of the temperature and humidity sensor is changed, that is the temperature and humidity sensor is mounted on the chassis far from the evaporator, so that the problem that water evaporation and condensation of the evaporator affects detection is solved, and the detection accuracy is improved. The invention also discloses a dehumidifier provided with the chassis component.

The invention provides a control system applied to advanced auxiliary driving, which comprises a control module and a camera module, the camera module is used for collecting image data, and the control module is used for carrying out parallel processing on the image data, obtaining a mark point coordinate set of a lane line based on a deep learning algorithm, detects the lane line through three-item type straight line fitting, and sends out corresponding control commands according to the detected lane line and a plurality of types of ADAS application functions integrated in the control module. Different types of ADAS application functions are integrated in one control system, so that the cost of the control system can be reduced, and the control performance is enhanced. A lane line detection method is adopted, the influence of illumination is reduced, and meanwhile arrows in the middle of a lane and filtering operation of a sidewalk can be processed.

The invention discloses an ultrasonic phased array inspection method for a hot melt welding joint of a gas polyethylene pipeline. The method includes the following steps: according to the thickness ofa gas polyethylene pipeline to be inspected, selecting a phased array probe to connect a phased array ultrasonic flaw detector, and connecting the phased array probe to a water wedge block; placing the water wedge block on a reference test piece made of a polyethylene material for ultrasonic phased array calibration; smoothly placing the water wedge block on a hot melt welding joint on the polyethylene pipeline, and compressing high rebound sponge by applying pressure to ensure that the high rebound sponge matches the hot melt welding joint and the polyethylene pipeline; setting a focusing rule of an ultrasonic phased array, and slowly injecting water into the water wedge block to fill the entire water wedge block; and moving the water wedge block to obtain an inspection image and performanalysis. According to the scheme of the invention, a coupling agent between the wedge block and a workpiece is the water, high economic benefits can be realized, and moreover, the method is applicable to polyethylene pipes with a certain curvature, and can be applied in the on-site inspection of the polyethylene pipes.

The invention discloses a method for detecting sulfur stable isotope in an atmospheric sample by SO+, which comprises the following steps: filtering and collecting the atmospheric sample, carrying out ultrasonic extraction, precipitating, firing, filling in a tin cup, wrapping, and detecting the sample to be detected by using an element analyzer-stable isotope mass spectrometer. The ion source parameters are optimized, the secondary ionization effect of high-energy electron flow on SO2+ is achieved by tuning the filament and the ion source lens voltage, sulfur isotope detection is conducted in the form of SO+ ions, and therefore accurate detection of the sulfur isotope ratio of an atmospheric sample is achieved, and the method is high in result accuracy, good in repeatability, easy and convenient to operate and high in efficiency.

The invention discloses a method for detecting sulfur stable isotopes in a surface water sample in an SO+ mode, which comprises the following specific steps: filtering, acidifying, precipitating and evaporating the surface water sample to dryness, filling in a tin cup, wrapping, and detecting a sample to be detected by using an element analyzer-stable isotope mass spectrometer. According to the method, SO+ is generated by utilizing the secondary ionization effect of the ion source high-energy electron flow on SO2+, and the SO+ ion beam is separated and tuned by optimizing the voltage of the quadrupole, so that the sulfur isotope ratio of the surface water sample is efficiently and accurately analyzed, the result precision is high, the repeatability is good, and the operation is easy.

Disclosed are a method and a device for detecting the state of a battery and a battery pack. The present invention uses a simple battery model to calculate the current battery state according to historical battery parameters, and at the same time, continuously updates the battery internal resistance and battery capacitance in the battery model based on the change of the charge state, thereby solving the problem on the basis of the simple model The influence of parameters over time and battery power changes on battery power detection improves the accuracy of battery and battery pack state detection.

The invention relates to an event detection oriented multi-strategy media data stream filtering method and a device thereof. The method comprises the following steps: in an offline stage, according tothe collected media user data, a garbage user database and an application source blacklist list are constructed; in the online identification stage, media data are filtered through the trash user database and the application source blacklist list, and non-event media data are filtered through the media content and context characteristics, and the media data are online clustered to identify the event clusters, and the media data in the event clusters are purified. The invention effectively solves the influence of noise data and other non-event data in the micro-blog data stream on the micro-blog event detection. The method can clean up most non-event micro-blogs in micro-blog data stream, effectively improve the performance of micro-blog event detection, real-time, practical, is convenientfor extraction of hot topics and emergencies in time, and has an important guiding significance for new media data stream processing technology.

The invention provides an active photovoltaic string arc fault detection method and system. The method comprises steps of an active signal injection step, actively generating a high-frequency signal,and actively outputting the high-frequency signal at a photovoltaic string side; a current signal acquisition step, measuring and recording a current signal on a direct current bus on the photovoltaicstring side, and acquiring the current signal information on the direct current bus on the photovoltaic string side; and an arc fault judgment step, carrying out wavelet transformation machining according to the current signal information on the direct current bus on the side of the photovoltaic string side, analyzing signal characteristics after wavelet transformation machining, comparing the signal characteristics after wavelet transformation machining with input high-frequency signals, determining whether the photovoltaic string has an arc fault or not, and obtaining the arc fault detection result information of the active photovoltaic string. The method is advantaged in that detection is carried out on the photovoltaic string side, and influence of inverter noise and different operation conditions on detection is fundamentally eliminated.

The invention discloses a technology for detecting sulfur stable isotope of root tip meristem culture garlic in an SO+ mode, which comprises the following specific steps: drying, grinding and filtering a root tip meristem culture garlic bulb sample by using a screen, filling into a tin cup, wrapping, and detecting a sample to be detected by using an element analyzer-stable isotope mass spectrometer. According to the method, secondary ionization and efficient separation of high-energy electron flow to SO2+ are realized by utilizing parameters of the tuning ion source ion lens and the quadrupole mass analyzer, so that the requirement of rapid and accurate detection of the sulfur isotope ratio of the root apex meristem culture garlic is perfected, and the detection result is high in accuracy, good in reproducibility and easy to operate and maintain.

The invention discloses a sludge sulfur element tracing method in riverway engineering and application, and the method comprises the following specific steps: drying, grinding and filtering a sludge sample through a screen, loading the sludge sample into a tin cup and wrapping the tin cup, and detecting a to-be-detected sample by adopting an element analyzer-stable isotope mass spectrometer. According to the invention, the high-energy electron flow generates a secondary ionization effect by optimizing the ion source H plate and the cathode voltage, and sulfur isotope detection is carried out in a sulfur monoxide mode, so that efficient and accurate detection of the sulfur isotope ratio of the river engineering sludge sample is realized, the result precision is high, the reproducibility is good, and the maintenance is simple and convenient.

The invention discloses a method for generating SO+ by utilizing secondary ionization of an isotope mass spectrum ion source so as to accurately and efficiently detect sulfur stable isotopes in a cultivated landscape plant sample, which comprises the following specific steps: drying, grinding and filtering the cultivated landscape plant sample by a screen, filling a tin cup with the dried and ground cultivated landscape plant sample, and wrapping; and detecting the sample to be detected by adopting an element analyzer stable isotope mass spectrometer. High voltage of the tuning ion source and filament voltage are utilized to generate high-energy electron flow to perform secondary ionization on SO2+, SO+ is generated to perform sulfur isotope detection, and the result shows that the precision is high, the repeatability is good, and the analysis and test efficiency is high.

The invention discloses a method for detecting sulfur stable isotope of six-petal red garlic in an SO+ mode, which comprises the following specific steps: drying, grinding and filtering a six-petal red garlic bulb sample by a screen, filling the six-petal red garlic bulb sample into a tin cup, wrapping, and detecting a sample to be detected by adopting an element analyzer-stable isotope mass spectrometer. According to the method, the tuning ion source electron bombardment source generates the high-energy electron flow to perform secondary ionization on SO2+ to generate SO+, and the signal stability of the SO+ is improved by controlling the pressure intensity of the carrier gas, so that the accurate and efficient detection of the sulfur isotope ratio of the six-petal red garlic is realized, the result precision is high, the reproducibility is good, and the operation is easy.