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104results about How to "Accurate judgment basis" patented technology

Method and system for recognizing lightning strike fault and lightning strike fault type of power transmission line

The invention discloses a method for recognizing the lightning strike fault and the lightning strike fault type of a power transmission line. The method comprises the steps of immediately judging the polarities of ABC three-phase current traveling waves after the power transmission line is subjected to single-phase fault tripping; judging that the power transmission line is subjected to the lightning strike fault and the fault type is counterstrike if the polarities are totally the same; executing a next step if the polarities are not totally the same; determining a current change rate R of a fault phase, and judging that the power transmission line is subjected to the lightning strike fault and the fault type is shielding failure if R is greater than a threshold value; judging that the power transmission line is subjected to a single-phase ground fault if R is not greater than the threshold value. The invention also discloses a system for recognizing the lightning strike fault and the lightning strike fault type of the power transmission line. The system comprises at least one group of fault detection devices, a wireless communication system and a remote monitoring station, wherein the fault detection devices, the wireless communication system and the remote monitoring station are sequentially connected, and the remote monitoring station adopts the method for judging the fault type of the power transmission line.
Owner:STATE GRID CORP OF CHINA +2

Neural network-based manually annotated white blood cell error calibration method and device

The present invention discloses a neural network-based manually annotated white blood cell error calibration method and device. The calibration method comprises the steps of S1 obtaining an original image; S2 pre-processing the image; S3 segmenting the white blood cells and extracting the edge pixel point coordinates of the cells; S4 selecting the cells having the obvious characteristics as the training data and using the other cells as the test data to train a network; S5 using a softmax classifier to score the test cells, and dividing the test cells into the concrete categories and the sub-categories according to the scores; S6 carrying out the polar coordinate data enhancement on the training cells and the sub-category cells; S7 retaining the enhanced training images, using the sub-category images to test and scoring; S8 according the scores, rejecting the cells that are not within the appointed categories and dividing the other cells into the concrete categories. According to thepresent invention, during the classification process, the interference cells that are meaningless to the classification can be rejected, and the peripheral blood white blood cells can be classified into a plurality of small categories, thereby increasing the cell classification accuracy substantially.
Owner:NANJING UNIV

Distribution transformer heavy overload identification early warning method based on neural network and terminal equipment

The invention relates to a distribution transformer heavy overload identification early warning method based on a neural network and terminal equipment, and the method is used for identifying and early warning a heavy overload event of a distribution transformer in a certain day, and comprises the following steps: 1) obtaining basic data of the distribution transformer in each transformer area tobe identified, and carrying out the preprocessing of the basic data; 2) based on the preprocessed basic data, carrying out coarse prediction classification on each transformer area distribution transformer, wherein the category of the coarse prediction classification comprises first-level safety, second-level safety and second-level attention; and 3) judging whether a transformer area distributiontransformer belonging to second-level attention exists or not, if so, performing fine prediction on the transformer area distribution transformer belonging to the second-level attention by adopting the trained GRU type neural network, outputting distribution transformer early warning information based on a fine prediction result, and if not, outputting distribution transformer normal information.Compared with the prior art, the method has the advantages that the state of dynamic monitoring at any time can be kept, the computing power can be saved, and the accurate prediction effect is achieved.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Wheel diameter correction method, device, apparatus, and readable storage medium

The invention discloses a wheel diameter correction method, which comprises the following steps: collecting speed signals of a plurality of wheel pairs in a preset period; Judging whether the speed signal of each wheel pair exceeds a preset threshold value; If not, the collected maximum speed signal is determined as the target signal, the ratio of the collected speed signal of each wheel pair to the target signal is determined as the correction coefficient of each wheel pair, and the speed correction value of each wheel pair is calculated according to the correction coefficient of each wheel pair. According to the collected speed signals of each wheel pair, The correction coefficients of each wheel pair are determined, and the speed correction values of each wheel pair are calculated according to the correction coefficients, so that the speeds of each wheel pair can be under the same datum condition, the accurate judgement basis for the anti-skid system is provided, the performance andreliability of the anti-skid system are improved, and the running safety of the locomotive is ensured. Accordingly, the invention discloses a wheel diameter correction device, a device and a readablestorage medium, which also have the technical effects mentioned above.
Owner:QINGDAO SRI TECH CO LTD

Concrete test piece and device for testing and evaluating self-curing capacity for water seepage of crack, and test and evaluation method

The invention discloses a concrete test piece and a device for testing and evaluating the self-curing capacity for water seepage of a crack, and a test and evaluation method. The concrete test piece comprises a test piece body and a crack ejecting device, wherein the test piece body is cylindrical; the crack ejecting device comprises a wedge-shaped body arranged at the top end of the test piece body; the pointed end of the wedge-shaped body is embedded into the test piece body, to form a top pressing end; the upper end of the wedge-shaped body is exposed out of the test piece body, to form a pressure applying end; the test and evaluation device comprises a water pressure container, a pressure test pipe and a water blocking tank; the water pressure container is cylindrically barrel-shaped; the pressure test pipe is communicated with the water pressure container and the water storage tank respectively. The concrete test piece and the device are simple in structure, convenient to manufacture, easy and feasible, and can be conveniently used for testing and evaluating the self-curing capacity for water seepage of the concrete crack. The test and evaluation method is simple in process and high in practicability, and can provide an accurate evaluation and judgment basis for the anti-seepage effect of a self-curing anti-seepage additive.
Owner:WEIFANG BAIHUITE NEW BUILDING MATERIAL CO LTD

Detector for three-dimensional deformation precision of intelligent driving type measuring instrument and detection method

The invention discloses a detector for the three-dimensional deformation precision of an intelligent driving type measuring instrument and a detection method. The detector comprises a platform, a guide rail system, a driving system connected with the guide rail system, a control system used for controlling the driving system and a detection platform which is arranged on the guide rail system and used for installing a measuring instrument. The detection method comprises the steps of first, acquiring initial actual measurement coordinates and resetting initial display coordinates to zero; second, adjusting the three-dimensional deformation precision detector; third, acquiring nth actual measurement coordinates and nth display coordinates; fourth, calculating a current actual measurement coordinate variation, a current display coordinate variation and a current difference; fifth, performing data storage; sixth, repeating the step two to the step five for n times; and seventh, calculating the precision of the measuring instrument. The detector is simple in structure and reasonable in design, the coordinate displacement of the measuring instrument in a three-dimensional space is adjusted by adopting an intelligent control driving device, and the reliability and the accuracy of the measurement precision of the measuring instrument while three-dimensional deformation monitoring is performed are detected.
Owner:CHANGAN UNIV

Method and system for recognizing lightning strike failure and lightning strike failure type of power transmission line

The invention discloses a method for recognizing the lightning strike fault and the lightning strike fault type of a power transmission line. The method comprises the steps of immediately judging the polarities of ABC three-phase current traveling waves after the power transmission line is subjected to single-phase fault tripping; judging that the power transmission line is subjected to the lightning strike fault and the fault type is counterstrike if the polarities are totally the same; executing a next step if the polarities are not totally the same; determining a current change rate R of a fault phase, and judging that the power transmission line is subjected to the lightning strike fault and the fault type is shielding failure if R is greater than a threshold value; judging that the power transmission line is subjected to a single-phase ground fault if R is not greater than the threshold value. The invention also discloses a system for recognizing the lightning strike fault and the lightning strike fault type of the power transmission line. The system comprises at least one group of fault detection devices, a wireless communication system and a remote monitoring station, wherein the fault detection devices, the wireless communication system and the remote monitoring station are sequentially connected, and the remote monitoring station adopts the method for judging the fault type of the power transmission line.
Owner:STATE GRID CORP OF CHINA +2

Snoring sound identification method and anti-snoring device

The invention discloses a snoring sound identification method. The snoring sound identification method comprises the following steps: continuously acquiring n sound samples, recording duration times of all of the sound samples as T1, T2...Tn, and recording internal times between adjacent sound samples as t1, t2...tn-1, wherein n is larger than 1 and smaller than 100; judging whether the duration times T1, T2...Tn are in a first threshold range or not, and if yes, performing the next step; judging whether the interval times t1, t2...tn-1 are in a second threshold range or not, and if yes, performing the next step; judging whether the maximum value in the difference values of every two of T1, T2...Tn is smaller than N%*T1 or not, wherein N is larger than 1 and smaller than 200, and if yes, performing the next step; judging whether the maximum value in the difference values of every two of t1, t2...tn-1 is smaller than N%*t1 or not, and if yes, determining that the n sound samples are snoring sounds. The invention further relates to an anti-snoring device. Through the adoption of the method and the device, the snoring sound can be effectively determined, environmental noise can be effectively filtered, and accordingly, the anti-snoring purpose can be realized effectively.
Owner:XIAMEN TUWAN INTELLIGENT TECH CO LTD

Intelligent integrated testing device and method of low-temperature insulated gas cylinder valve

The invention discloses an intelligent integrated testing device and method of a low-temperature insulated gas cylinder valve. The intelligent integrated testing device comprises an industrial control computer (1), wherein the industrial control computer is connected with a PLC control system (2) through an RS232 serial communication interface, the input end of the PLC control system is connected with automatic/manual switching button and limit switch signals of a stop valve service life test unit (3), a shell pressure-resisting test unit (4) and a valve action performance test unit (5), the output end of the PLC control system is connected with control solenoid valve coils of the stop valve service life test unit, the shell pressure-resisting test unit and the valve action performance test unit through a contactless relay (6), and pressure sensor signals of the stop valve service life test unit, the shell pressure-resisting test unit and the valve action performance test unit are connected with the PLC control system through an A/D module (7). The intelligent integrated testing device integrates various testing devices of the valve and achieves automatic testing control through the industrial control computer and the PLC control system.
Owner:江南工业集团有限公司
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