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221results about How to "Reduce the difficulty of identification" patented technology

Method for detecting faults caused by foreign body pollution between electrified railway insulator plates based on affine invariant moment

The invention relates to a method for faults caused by foreign body pollution between electrified railway insulator plates based on affine invariant moment, which aims at solvating the problems of a complicated background of insulator problem detection and the like caused by much original image content. The method can be used quickly and accurately identifying and positioning insulators through overall image classification and by virtue of the affine invariant moment, and then can be used for carrying out fault detection on the insulators. The method comprises the following steps of: detecting, identifying and classifying shafts by virtue of a Hough transformation segment, thus obtaining an insulator type after setting the classified shafts as a background; then applying the affine invariant moment to extract the insulators in the insulator type; in order to solve the problem of different change of the angles of the insulators, carrying out straight-line fitting on the boundary curves of the insulators to obtain the rotation angles of the insulators; in order to avoid the loss of foreign body characteristics, amplifying the characteristics of the insulators by virtue of morphological dilation operation; in order to improve the local contrast of insulator images, dividing each piece of the image into a block to carry out local contrast control on each block; and then carrying out grey level value statistic on each row of the blocks, and finally identifying and positioning the faults through the width of each strip in a grey level statistical chart. The method based on prior classification disclosed by the invention simplifies the background of the insulators, efficiently improves the speed and accuracy of insulator identification and positioning, reduces the difficulty of fault detection, and provides an advisable reference for the insulating property detection of an electrified railway.
Owner:SOUTHWEST JIAOTONG UNIV

Method and device for identifying relationship between transformer area phase sequence and line households

The invention relates to a method for identifying a relationship between a transformer area phase sequence and line households. The method comprises the steps of: acquiring an active current value ofa low-voltage outlet line of each phase of the target transformer area, an active current value data and voltage time sequence data of each electric meter, and voltage time sequence data of a three-phase bus at a distribution transformer low-voltage side; classifying types of the electric meters according to the voltage time sequence data, and acquiring electric meter sets; determining the electric meter set to which the low-voltage outlet line of each phase is to be assigned according to the active current value of the low-voltage outlet line of each phase, the active current values and the voltage time sequence data of the electric meters, the voltage time sequence data of the three-phase bus at the distribution transformer low-voltage side and the electric meter set; and combining arbitrary electric meter sets in electric meter sets of each type, and matching the combined electric meter set to be an electric meter classification set Gamma of a phase low-voltage outgoing line i if asum of the active current values after combination and an active current value of the phase low-voltage outgoing line i satisfy a first preset condition. The method and the device have the advantagesof low identification difficulty, high precision, no need of additionally arranging other terminal equipment, high operability and small operation and maintenance pressure.
Owner:GUANGZHOU POWER ELECTRICAL TECH CO LTD

Method for estimating remaining power of electric vehicle power battery

The invention discloses a method for estimating the remaining power of an electric vehicle power battery. The method comprises steps that based on the volume Kalman algorithm, a model for estimating the remaining power of the power battery is established; polarization internal resistance Rp(k), polarization capacitance Cp(k), equivalent ohmic internal resistance R0(k), the remaining power SOC (k)and an end voltage Ut(k) of the power battery at the time k are obtained; an open circuit voltage UOC(k) of the power battery at the time k is calculated; a state estimation error delta e(k) and a noise error V(k) are calculated; the BP neural network based on width learning is constructed, the delta e(k) and the V(k) are inputted into the BP neural network, and a variance compensation value deltaQk of process noise distribution at the time k and a variance compensation value delta Rk of observed noise distribution are outputted by the BP neural network; the delta Qk and the delta Rk are utilized to compensate Qk-1 and Rk-1 at the time k-1, and Qk and Rk at the time k are generated; a value of x(k+1) of the model for estimating the remaining power of the power battery is calculated through the volume Kalman algorithm, and the remaining power SOC (k+1) at the final (k+1) time is obtained. The method is advantaged in that the remaining power of the power battery can be rapidly and accurately estimated.
Owner:HANGZHOU ZHONGHENG ELECTRIC CO LTD

Color identification and contour extraction-based object dynamic locating method

The invention belongs to the field of object locating methods and discloses a color identification and contour extraction-based object dynamic locating method. The method comprises the following steps of 1) performing object marking: applying a tag to the surface of each object needed to be identified; 2) performing data obtaining: collecting images of all tags in real time and transmitting the images to a computer; 3) performing color identification: converting the obtained images to an HSV space from an RGB space, and extracting a pixel pattern of each single-color interval; 4) performing contour extraction: performing the contour extraction, and reserving contours with areas in a screening range; and 5) performing object locating: performing fitting on the contours obtained by screening to obtain a minimum fitting periphery, obtaining central point coordinates of the objects, and then obtaining the positions of the objects. According to the method, the to-be-identified objects are subjected to specific color and shape marking, so that the identification difficulty is lowered; and the RGB space is converted to the HSV space, and the specific color intervals are set, so that accurate color distinguishing and accurate object locating can be realized.
Owner:HUAZHONG UNIV OF SCI & TECH

Dangerous article intelligent identification method and system and dangerous article security inspection system

The invention relates to a dangerous article intelligent identification method and system and a dangerous article security inspection system, belongs to the technical field of security inspection, andsolves the problem that the existing security inspection process can realize dangerous article intelligent identification only by upgrading and transforming equipment. The dangerous article intelligent identification method comprises the following steps that a dangerous article intelligent identification system receives and stores line data corresponding to a measured object, and sequentially displays scanned images obtained after the line data are processed in a real-time and sequential rolling mode, and the line data are source data of the measured object scanned by a security inspection machine system; a certain amount of line data is extracted to generate a to-be-identified image; whether the to-be-identified image comprises a suspected dangerous article or not is judged, and if yes,related information of the suspected dangerous article is generated; and the related information of the suspected dangerous article is superposed on the scanned image displayed in a rolling manner. The intelligent identification function of the dangerous goods is independent of a security inspection machine system, and intelligent identification of the dangerous goods and rolling display of related information can be realized without changing the working process and personnel configuration of security inspection.
Owner:BEIJING HANGXING MACHINERY MFG CO LTD

Antenna controller for advanced broadcasting system-satellite (ABS-S) satellite signal mobile-satellite

The invention provides an antenna controller for an advanced broadcasting system-satellite (ABS-S) satellite signal mobile-satellite, and belongs to the technical field of antenna control of the mobile-satellite. The antenna controller solves the problems that the antenna controller cannot accurately identify an ABS-S standard satellite, is inconvenient for system upgrading, and complex in control and operation and the like in the prior art. The antenna controller is independent of a mobile-satellite antenna, is connected with the mobile-satellite antenna and a satellite receiver respectively, and comprises a main control circuit, a power supply management circuit, and a liquid crystal display (LCD) liquid crystal screen and a key circuit which are connected with the main control circuit respectively, wherein the power supply management circuit is connected with the main control circuit, supplies power to the main control circuit, and can convert input direct current voltage into required voltage; and the main control circuit can distinguish the voltage of the satellite receiver, and simultaneously the main control circuit normally communicates with the mobile satellite antenna and controls the mobile satellite antenna until a target satellite is locked. The antenna controller can accurately identify the ABS-S standard satellite, and is convenient for system upgrading and simple and convenient for control and operation.
Owner:ZHEJIANG CHINASTAR ELECTRONICS SCI & TECH

Method for estimating open-circuit voltage of battery based on gas-liquid dynamic model and device

The invention provides a method for estimating the open-circuit voltage of a battery based on a gas-liquid dynamic model and a device. The method for estimating the open-circuit voltage of the batterybased on the gas-liquid dynamic model comprises the following steps that 1, an undetermined open-circuit voltage estimation equation is deduced according to the gas-liquid dynamic model; 2, equationparameters are identified and estimated according to experimental data; and 3, an open-circuit voltage estimation method is designed according to the complete open-circuit voltage estimation equation,and calculating is carried out to obtain an open-circuit voltage estimation value. The open-circuit voltage estimation equation comprises the battery temperature, does not need to be coupled with thebattery temperature again, and simplifies the open-circuit voltage estimation process. The principle of gas dissolution / precipitation in the estimation equation is equivalent to the polarization effect of the battery, the phenomenon that the open-circuit voltage lags the terminal voltage of the battery cab be better fitted. An estimation result of the estimation equation does not depend on the precision of an input initial value, and excellent estimation robustness is achieved. According to the method and device for estimating the open-circuit voltage of the battery based on the gas-liquid dynamic model, the non-linear process of battery charging and discharging can be more accurately depicted, a simple analytical formula, easy parameter identification and small calculation amount are achieved, the influence of battery temperature characteristics on the open-circuit voltage is reflected, and the method and device for estimating the open-circuit voltage of the battery based on the gas-liquid dynamic model is convenient to realize in engineering.
Owner:承德神奥新能源科技有限公司

Bridge stay cable force online detection method and system based on fiber sensing

The invention provides a bridge stay cable force online detection method and system based on fiber sensing. The system comprises a fiber grating vibration sensor group, a fiber grating vibration demodulation instrument and a stay cable vibration signal processing unit. The fiber grating vibration sensor group comprises a plurality of fiber grating vibration sensors connected in series with the same fiber, each fiber grating vibration sensor is designed based on a cantilever structure and a double-raster coupling method, and chirp rasters are used to replace Bragg rasters, such that the detection scope of the sensors is enlarged, the stability and the anti-interference capability of the sensors are improved, and at the same time, the manufacturing difficulty of the sensors is reduced. The fiber grating vibration demodulation instrument is based on an edge filtering demodulation principle and employs a wavelength division multiplexing technology to realize distributed measurement of a stay cable force, and multiple fiber grating vibration sensors can be multiplexed in one fiber signal, such that the detection capability of the system is improved, the distributed measurement of the stay cable force is made possible, and a more reliable technical means is provided for online detection of a wide-span bridge stay cable.
Owner:WUHAN UNIV OF TECH

Internet-of-things terminal intelligent configuration method and system based on appearance information recognition

The invention discloses an internet-of-things terminal intelligent configuration method and system based on appearance information recognition. The method comprises the following steps of: carrying out photographing on controlled equipment by a camera and obtaining appearance information of the controlled equipment; transferring the appearance information of the controlled equipment to a home control center by an internet of things; and carrying out matched processing on the appearance information of the controlled equipment and internal digital codes of the same controlled equipment as complete identification information of a controlled object, and returning a remote controller for operation of the controlled equipment. According to the invention, due to adoption of matching of the appearance information of the controlled equipment and the internal digital codes of the same controlled equipment as the complete identification information of the controlled object, the external characteristics of different household appliances are different completely, so that the recognition difficulty for different household appliances is greatly reduced, the recognition accuracy is improved, further recognition software can be optimized and used hardware equipment also can be simplified.
Owner:KONKA GROUP

Vehicle identification method based on fusion of radar and vision information

The invention discloses a vehicle identification method based on fusion of radar and vision information. The vehicle identification method based on fusion of radar and vision information includes thefollowing steps: S100, entering all the information of a vehicle to be identified; S200, acquiring the current positional information and the motion state information of the vehicle; S300, acquiring the appearance information of the vehicle to be identified; S400, comparing the acquired appearance information of the vehicle to be identified with the entered vehicle information; and S500, recordingand uploading the information of the illegal vehicle and the vehicle driver. The vehicle identification method based on fusion of radar and vision information monitors the vehicles on the road in real time through the method of integrating the radar with vision information, determines the best position of shooting through the radar, can capture the clear image of the vehicle to be identified, canobtain the information of the vehicle to be identified through vision information processing, can determine whether the driver has illegal behavior through information comparison, and can greatly improve the accuracy and efficiency of vehicle identification through the method of combining the radar and the vision information.
Owner:WUHU HANGFEI SCI & TECH

Method for simplifying electric power system synthetic load model and identifying model parameters

The invention relates to a method for simplifying an electric power system synthetic load model and identifying model parameters, and belongs to the technical field of electric power system load stability monitoring. According to the method, the internal relationship between parameters of an induction motor is deeply analyzed, and on this basis, by converting the input-output relationship of the model, a simplified electric power system synthetic load model is provided. According to the simplified electric power system synthetic load model, possible steady-state operation states of multiple sets of simplified electric power system synthetic load models are preset, parameter identification is carried out through the least square method on the basis of a state equation of the part of the induction motor of the simplified electric power system synthetic load model, corresponding indexes are provided to reflect identification precision, and the set model with the highest precision is selected from all preset steady state conditions, and an identification result corresponding to the set of model is used as the final identification result. The method has high generalization performance and feasibility, and can accurately and quickly identify the parameters of the electric power system synthetic load model.
Owner:TSINGHUA UNIV
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