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925results about How to "Timely detection" patented technology

An operator on duty violation behavior detection method and system

The invention relates to an on-duty person violation behavior detection method and system, belongs to the technical field of intelligent video analysis, and solves the problems of low efficiency, highcost and low recognition accuracy of an existing detection method. The method comprises the following steps: constructing a target detection network model, and training by using a data set; acquiringmultiple paths of videos at different angles in the same scene in real time, carrying out multi-target detection and tracking by utilizing a trained target detection network model and a target tracking algorithm, acquiring personnel information in each path of videos, carrying out integration processing, and judging whether behaviors of personnel on duty are abnormal or not. According to the invention, an environment camera video is used as an input video source for intelligent video analysis; the system supports multi-channel video source input and fusion analysis, greatly improves the recognition accuracy of illegal behaviors through deep learning and data modeling means, and achieves the real-time and accurate monitoring of the duty behaviors of personnel on duty in scenes such as a monitoring center, a duty room, a command center and the like.
Owner:XINGTANG TELECOMM TECH CO LTD +2

Method and client device for detecting phishing websites

The invention provides a method and a client device for detecting phishing websites and aims at solving the problem that existing detecting methods cannot detect newly-emerging phishing websites due to the delay. The method for detecting the phishing websites comprises obtaining the URL (uniform resource locator) of a target website and obtaining the page information of the target website according to the URL; extracting key area characteristics from the page information of the target website and subjecting the key area characteristics to the interface image similarity matching with key area characteristics in a real key area characteristic library; and if the matching degree of the interface image similarity matches with a second preset condition, determining the target website to be a phishing website, if not, determining the target website to be a normal website. The method for detecting the phishing websites completely utilizes local characteristics as the detection marks without image cutting or distance matching, thereby being applicable to the blurring mapping of images and effectively identifying the phishing websites even though the images of the phishing websites are deformed or warped.
Owner:ALIBABA GRP HLDG LTD

Device and method for detecting amount of bottom thread of sewing machine

The invention provides a device for detecting the amount of bottom thread of a sewing machine. The sewing machine comprises a bottom plate, a rotating shuttle and an electronic control module, wherein the rotating shuttle comprises a shuttle shell and a shuttle core; the shuttle core comprises a winding post and two flanges; at least one flange in the two flanges is provided with a first surface part and a second surface part on the outer surface; a light hole is formed on the outer wall of the shuttle shell; the first surface part or the second surface part is exposed outside from the light hole; the sewing machine also comprises a sensor fixed in the bottom plate; the sensor comprises a transmitter used for transmitting light, and a receiver used for receiving light; the receiver and the transmitter of the sensor just face to the first surface part or the second surface part exposed outside from the light hole, and the light reflection capabilities of the first surface part and the second surface part are different from each other; the sensor is connected with a signal processing module; the signal processing module is connected with the electronic control module. The device for detecting the amount of the bottom thread of the sewing machine is capable of timely detecting whether the bottom thread is used up or not in real time.
Owner:JACK SEWING MASCH CO LTD

Web page wooden horse detecting method based on behavior characteristic

This invention uses browser to check Troy virus wed belonging to computer safety field, which realizes rapid and accurate checking on web Troy web through system process adjusting and memory change. This invention basic principle must generate one new process browser when checking hidden Troy virus through rapid checking on the web through system monitoring to solve the virus web to provide user with safe net environment.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Temperature detection circuit and mobile communication equipment

The invention discloses a temperature detection circuit and a mobile communication equipment, comprising a divider circuit consisting of a thermal resistor and a fixed resistor connected together, wherein, the dividing point of the divider circuit is connected with a voltage detection unit; when detecting that the voltage value at the dividing point reaches the preset temperature alarm voltage valve, the voltage detection unit outputs an alarm signal to an application processor to close part of or the whole circuit in the system by the application processor in order to reduce the temperature of the whole machine. With a simple structure, the temperature detection circuit of the invention realizes timely detection of the whole system temperature and guarantees security of equipment using process, particularly applicable to the mobile communication equipment, such as the mobile phone and the PDA, with characteristics of high electricity consumption and concentrated heating when the system is in operation.
Owner:QINGDAO HISENSE MOBILE COMM TECH CO LTD

Fault detection method and system of non-Gaussian industrial process

The invention relates to the field of industrial process monitoring and fault diagnosis, and discloses a fault detection method and system of a non-Gaussian industrial process in order to online detect the non-Gaussian industrial process conveniently and practically. The method includes: step 1, selecting a certain quantity of normal historical data sets, performing mean value preprocessing on the data sets, and establishing a residual generator by employing a canonical correlation analysis method; step 2, determining a corresponding threshold of the corresponding residual generator by employing a Monte Carlo method; and step 3, performing real-time online detection on industrial process data according to the determined threshold of the corresponding residual generator.
Owner:CENT SOUTH UNIV

Forest fire detection system based on unmanned aerial vehicle flight platform

The invention provides a forest fire laser radar detection system based on an unmanned aerial vehicle. The system comprises an unmanned aerial vehicle system and a forest fire detection system. The system is mainly characterized in that forest inspection can be performed and the forest fire combustion point and the range of combustion can be timely discovered. Laser radar emits laser to detect the forest through a laser transmitter. The laser is absorbed and reflected through the combustion area. An optical receiver receives the reflected light. A signal converter converts light signals into electric signals. A microprocessor processes the electric signals. The advantages of the system are that the device is convenient to carry and can remotely detect the forest fire in a wide range of area and accurately measure the place and the range of fire. The change of the forest temperature can also be detected by the forest fire laser radar detection system based on the unmanned aerial vehicle so as to achieve the objective of forest fire inspection.
Owner:NANCHANG HANGKONG UNIVERSITY

Systems and Arrangements for Clock and Data Recovery in Communications

ActiveUS20080137789A1Improve data sampling and waveform sampling processImprove accuracyAmplitude demodulationPulse duration/width modulationTime changesDigital data
A sampling clock signal controller for receivers of digital data is disclosed. Specific bit patterns of a data waveform can be identified, and stored time samples of the waveform that correspond to the specific bit patterns can be analyzed to improve the timing of a sampling clock signal. These “time-amplitude” samples on known bit patterns can be utilized to determine if a sample on the data waveform should be taken before the center of the eye pattern, at the center of the eye pattern, or after the center of the eye pattern and by what time change. Accordingly, a single low power clock can be utilized to adjust the timing of the sample clock such that improved communication scan be achieved. Such a single clock system has reduced power requirements and increased accuracy.
Owner:GLOBALFOUNDRIES US INC

Method for roughly trimming diamond grinding wheel

The invention provides a method for roughly trimming a diamond grinding wheel. The method includes steps of A, scanning the surface of the diamond grinding wheel, acquiring the highest point of the surface of the grinding wheel and determining the position of the highest point in radial, axial and generating line directions; B, emitting a focused pulse laser beam along the inner normal direction of the surface of the grinding wheel and enabling the position of a focal spot of the focused pulse laser beam to be coincided with the position of the highest point of the grinding wheel in the radial, axial and generating line directions; C, erecting a silicon carbide roller at a position opposite to a generating line of the grinding wheel and setting the cutting depth as 0.005mm; and D, repeating the steps once after the grinding wheel is trimmed for 3 to 5 minutes until a circle run-out error of the grinding wheel is not larger than 20 micrometers. The method has the advantages that diamond grains are ablated and directly removed by the focused pulse laser beam, remaining diamond grains are removed by the silicon carbide roller, deteriorative layers of surfaces of the grains which are ablated by laser, grains without holding force and the like are mechanically peeled off, and the method is applicable to efficiently roughly trimming diamond grinding wheels with large grains.
Owner:HUNAN UNIV

Full-automatic camshaft assembling machine

The invention relates to a full-automatic camshaft assembling machine. The full-automatic camshaft assembling machine comprises a rack and a power distribution control cabinet arranged in the rack; arotating disk device is arranged on the middle portion above the rack; and a shaft feeding device, a cam vibrating feeding disk, a cam feeding device, a press-fitting device, a floating shaft pressingdevice, a laser welding device, a flaw detecting device and a discharging device in butt joint with carrier assemblies are sequentially arranged above the rack in the rotating direction of a rotatingdisk. According to the full-automatic camshaft assembling machine, by means of the shaft feeding device, a shaft is placed in the carrier assembly on the rotating disk device, and the carrier assembly rotates clockwise along the rotating disk and sequentially rotates onto the cam feeding device to perform cam feeding, onto the press-fitting device so as to press a cam into a matching groove of the shaft, onto the floating shaft pressing device to push down the shaft to be clamped with the matching groove, onto the laser welding device to perform laser welding on the matched portion of the shaft and the cam, onto the flaw detecting device to detect bruised damage and scratches, and onto the discharging device to perform discharging; and the assembling process of the cam and the shaft is completed, the positioning precision is high, and defective products are detected in time.
Owner:DONGGUAN RONGGONG AUTOMATION TECH CO LTD

Phase-locked loop applicable to power grid voltage unbalance and distortion states

The invention discloses a phase-locked loop applicable to power grid voltage unbalance and distortion states, and belongs to the related technical fields of power grid voltage phase signal detection and power grid load harmonic current extraction. The phase-locked loop provided by the invention aims to solve the problem as follows: the conventional synchronous rotating reference frame based three-phase digital phase-locked loop cannot accurately detect the phase value of the three-phase voltage fundamental wave positive-sequence component under power grid voltage unbalance and distortion states; consequently, the precision of a related harmonic current extraction algorithm is lowered, and the compensation effect of a harmonic compensation apparatus is weakened. The phase-locked loop provided by the invention improves the conventional three-phase digital phase-locked loop, and a repetition controller is introduced; the repetition controller is connected with a proportional integral controller in parallel to form a new controller, so that the excellent steady-state performance of the repetition controller is combined with the excellent dynamic performance of the proportional integral controller; and therefore, the phase-locked loop has the advantages of high dynamic response, high detection precision and the like. The phase-locked loop is mainly applied to voltage phase detection under power grid voltage unbalance and distortion states.
Owner:DALIAN UNIV OF TECH

Traffic video visibility detecting method based on road surface brightness and least square approach

The invention discloses a traffic video visibility detecting method based on the road surface brightness and the least square approach, and belongs to the technical fields of video image processing and visibility detecting. The detecting method comprises the following steps: 1) acquiring road traffic video images; 2) calibrating the acquired images by a Pan/Tilt/Zoom camera to extract a road surface region of interest (ROI); 3) extracting a road surface region formed by pixel points with the same brightness in the ROI and calculating the value of the road surface brightness; 4) by virtue of combination with the Koschmieder theory and the least square principle, building a squared brightness difference objective function to obtain the optimal solution of an extinction coefficient k; 5) transforming the optimal solution of the extinction coefficient k into image visibility distance Vmet; 6) drawing a curve of visibility changing along with time, observing the visibility condition and performing prejudgment. Proven by experiments, the method is compatible with an existing common traffic condition monitoring system, high in calculation accuracy, high in speed, excellent in robustness to noise, and wide in application prospect.
Owner:南京汇川图像视觉技术有限公司

Line inspection robot

The invention discloses a line inspection robot, comprising a line inspection robot system and shooting systems. The line inspection robot is characterized in that the line inspection robot system comprises a line hanging device, a high voltage power transmission line position detection device and a line inspection robot main body; the shooting systems are fixedly installed on two ends of the line inspection robot main body; the line inspection robot main body is in mechanical fixed connection with the line hanging device and the high voltage power transmission line position detection device; the whole line inspection robot system is connected to the power transmission line through the line hanging device; the line hanging device can realize motions like driven crawling, safe self-locking, off-line obstacle crossing, etc, of the line inspection robot system; the high voltage power transmission line position detection device enables the line inspection robot system to accurately position the power transmission line and realizes obstacle detection; the line inspection robot main body can realize the fact that the line inspection robot system performs swinging in a 3D space; and the shooting system can realize real time collection and transmission of an image.
Owner:北京动力京工科技有限公司 +1

OPC UA multi-server aggregation method supporting cache management

ActiveCN108199897ATimely detectionSolve problems with high complexityData switching networksData informationIntensive management
The invention relates to an OPC UA multi-server aggregation method supporting cache management, and belongs to the technical field of industrial network. Aiming at an industrial control network whichadopts an OPC UA protocol, a multi-server aggregation method capable of integrating original server node information of a field layer is realized through design of an intermediate layer between a bottom-layer device and an upper-layer system. The method is composed of multiple components such as communication interface processing, aggregated data processing, management configuration and safety configuration, can perform intensive management on the information transmitted by the bottom-layer device and can provide seamless forwarding of data information upwards for OPC UA client through a formof an interface, so that the connection number of the client and the bottom-layer server is reduced to a certain extent, and convenience is brought to network deployment and maintenance. Meanwhile, the invention also provides a cache management method aiming at data aggregation; through an efficient server caching mechanism and a corresponding algorithm, the actual communication frequency of the upper-layer client and the lower-layer server is reduced, the communication efficiency is increased, and the communication expense is reduced.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Intelligent sensing network system for detecting outdoor sound of calling for help

The invention relates to an intelligent sensing network system for detecting outdoor sound of calling for help. The intelligent sensing network system comprises a plurality of detecting nodes for calling for help. The detecting nodes for calling for help collect sound information in scenes with the detecting nodes and analyze and process the collected sound information. When the sound information comprises sound of calling for help, the detecting nodes for calling for help transmit the sound information to a monitoring center. The detecting nodes for calling for help can collect the sound information in the scenes and can analyze if the sound information comprises information of calling for help, and when the information of calling for help is included, the detecting nodes transmit the sound information and position locating information of the detecting nodes for calling for help to the monitoring center, and sound-light alarm can be conducted through an alarming device. The intelligent sensing network system is compact in structure, can detect information of calling for help in dangerous scenes and is wide in application range, low in use cost, safe and reliable.
Owner:JIANGSU CAS JUNSHINE TECH

Method for synthesizing biodiesel by two-step catalysis of lipid via Yarrowia lipolytica lipase, and biodiesel obtained thereby

The present invention provides a crude lipase enzyme solution of Yarrowia lipolytica microzyme CGMCC No.2707 and a method for synthesizing biological diesel oil by catalyzing the hydrolization and esterification reaction of waste animal and vegetable fat by the immobilized lipase of the crude lipase enzyme solution. A method for preparing the lipase crude enzyme solution and the immobilized enzyme is also provided. The method uses hydrolization and esterification reactions of the oil and fat use lipase as catalysts, but does not use strong acid and strong base. The method has the advantages of mild reaction condition and small pollution. Organic solvent is not used during the entire production process of the fatty acid methyl ester / ethyl ester. The reaction is safe and the efficiency is high.
Owner:领先生物农业股份有限公司

Method for repairing solar cell module

The invention discloses a method for repairing a solar cell module, relating the technical field of solar cell modules. The method comprises the following steps of (1) removing a module frame; (2) heating the module by a repair heating stage; (3) uncovering a back plate; (4) testing the module by an electroluminescent tester; (5) removing broken cell pieces; (6) cutting EVA (Ethylene-Vinyl Acetate); (7) replacing the broken cell pieces; (8) repairing glue pits; (9) testing the module by the electroluminescent tester; (10) laminating the repaired module; (11) testing the module by the electroluminescent tester; and (12) framing the tested and qualified module. According to the method, the broken cell pieces can be quickly and accurately repaired, and the quality and the using performance of the solar cell module can be ensured.
Owner:HENGSHUI YINGLI NEW ENERGY
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