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1861results about How to "Avoid false positives" patented technology

Domestic multifunctional intelligent robot

A domestic multifunctional intelligent robot comprises a processing and control system and a plurality of functional subsystems, and the functional subsystems comprise the movement system, the data collection system and the communication system. The domestic multifunctional intelligent robot is characterized in that the movement system comprises a locating module and a driving module, the locating module is used for recognizing and locating the environment where the robot is located, and the driving module is used for controlling movement of the robot; the data collection system comprises a vision module, a voice module and a data collection module, the vision module comprises a camera used for collecting video images, and the voice module comprises a pickup used for collecting audio information; the communication system comprises a wireless communication module used for achieving telecommunication of the robot; the processing and control system comprises a processing module and a control module, the processing module is used for receiving data in the functional subsystems in real time and processing the data according to a preset algorithm, and the control module is used for issuing control instructions to all the functional subsystems based on the processing result to control the movement of the robot.
Owner:CHENGDU BESTVISION TECH

Vehicle driving safety monitoring method, device and system

The invention discloses a vehicle driving safety monitoring method, a vehicle driving safety monitoring device and a vehicle driving safety monitoring system. The vehicle driving safety monitoring method comprises the steps of: determining a driving route range between a starting address and a destination address as well as a reasonable time range of arriving at the destination address by a taxi taking server according to the starting address and the destination address contained in a taxi booking request; sending an in-vehicle image acquisition command to vehicle-mounted intelligent equipment if the taxi taking server determines that vehicle position exceeds the driving route range or the vehicle driving time exceeds the reasonable time range according to driving data of a vehicle transmitted by the vehicle-mounted intelligent equipment, so that the vehicle-mounted intelligent equipment acquires in-vehicle image information and transmits the in-vehicle image information to the taxi taking server; comparing the in-vehicle image information acquired in the former period and the later period on the basis of the in-vehicle image information acquired after the vehicle-mounted intelligent equipment responds to the taxi booking request and a passenger gets on the vehicle; and sending alarm information to a safety monitoring server when determining that an unsafe index reaches a preset alarm threshold value, and notifying traffic police near the vehicle to vehicle to check or monitor the vehicle to ensure driving safety.
Owner:BEIJING QIHOO TECH CO LTD

Method and device for tracking crowds and counting pedestrian flow

The invention provides a method and a device for tracking crowds and counting pedestrian flow. The method includes acquiring real-time color images and depth images of scenes; preprocessing the images; carrying out difference operation on backgrounds of the depth images to obtain moving foreground depth images; detecting pedestrian head regions in the foreground depth images and dividing the pedestrian head regions from the foreground depth images; judging the head regions and removing non-head regions; matching and tracking pedestrian heads according to joint matching probability functions; creating head state spatial switching relational graphs to count the pedestrian heads. The method and the device have the advantages that the position of each pedestrian can be tracked and recorded by the aid of the method and the device, the speeds and the directions of the pedestrians in walking procedures can be computed, the crowds can be tracked under various conditions, and the pedestrian flow can be counted under the various conditions; the method and the device are free of influence of illumination conditions and illumination change; false alarm due to false objects can be filtered out; the device is stable in performance and high in speed, efficiency and accuracy.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Video-based airplane entry-departure parking lot automatic detection method

The invention relates to a video-based airplane entry-departure parking lot automatic detection method. A video image of a monitoring area covering an airplane shutdown parking lot area is obtained, a motion object is identified and tracked, characteristic points of an image in a detection area are extracted and tracked in a matching manner, when the number of characteristic points meeting airplane entry or departure direction requirements in a certain number of continuous frames of the video image accords with a required quantity, a judgment about official entry or departure is further made, and when displacement of a characteristic point set is smaller than certain pixels and the motion object does not enter but continuously departs from an airplane shutdown parking lot area, it is determined that an airplane officially parks in place; and when the displacement of the characteristic point set is smaller than or equal to certain pixels and the motion object does not depart from but continuously enters the airplane shutdown parking lot area, it is determined that the airplane officially departs, wherein the detection area is a set are opposite to the airplane shutdown parking lot area on the video image. The method provided by the invention can realize round-the-clock intelligent detection of accurate arrival time of airplane flight and is quite high in detection accuracy.
Owner:北京天睿空间科技股份有限公司

Long-time stable human face detection and tracking method in bank scene and long-time stable human face detection and tracking device in bank scene

The invention provides a long-time stable human face detection and tracking method in a bank scene. The method comprises the following steps that a human face detection module is adopted for detecting human faces in a certain frame of image; a moving target detection module is adopted for detecting targets moving in several continuous frames; the human face frame credibility is calculated according on the basis of the results of the human face detection results and the moving target detection results; the human face frame with higher credibility is output to a target tracking module; the target tracking module adopts an area matching method for tracking the human face frame with higher credibility; and the target tracking module adopts the area matching method for tracking the human face frame with higher credibility. The invention also provides a long-time stable human face detection and tracking device in the bank scene. Through the method and the device, the human face in any angle can be detected in a video, the specific human face can be output, the more stable and more continuous human face image output can be realized, the error detection condition of human face detection is effectively avoided, and the condition of detection missing capability of the human face detection is overcome to a certain degree.
Owner:ZHEJIANG ICARE VISION TECH

Integrated control system for road junction traffic

The invention relates to an intersection traffic comprehensive control system, wherein a statistical module is used to generate vehicle flow data of each traffic lane and each direction, a traffic light intelligent control module is used to generate vehicle stopping and queuing data of corresponding traffic lanes and directions, a vehicle speed detecting module is used to generate vehicle speed data, a snapshot control module is used to generate a snapshot control signal, a traffic light control module is used to receive each traffic light control instruction of a central processing module and to connect or disconnect a corresponding traffic light power supply circuit, the central processing module is used to receive information and data which is sent by other modules and devices and to control other modules and devices. The intersection traffic comprehensive control system has various control functions of monitoring the traffic conditions, controlling the traffic lights and shooting violation vehicles and the like, the functions of the system and the various devices which are controlled by the system are effectively exerted, the system structure is simplified, the investment is saved, and the system building and using are convenient.
Owner:AOCHENGTONGLI S&T DEV BEIJING

Partial discharge detecting system for all-fiber power transformer and detecting method thereof

The invention relates to a partial discharge detecting system for all-fiber power transformer and a detecting method thereof. The system comprises a controller, a transmission device and a detecting device. The detecting device comprises four groups of fiber bragg grating F-P ultrasonic sensors, optical fiber delayers are arranged between every two fiber bragg gratings, and the four groups of fiber bragg grating F-P ultrasonic sensors and a fluorescent probe are in serial connection on an optical fiber. The transmission device is connected with the detecting device through a through part. The controller is connected with the transmission device. In the calculation processing end, the partial discharge position can be calculated and determined through the time difference for the four groups of sensors to receive sound wave and by taking time division multiplexing time error into consideration. According to the strength of stimulated emission light signals of the fluorescent probe, the apparent discharge magnitude of the partial discharge is calculated. Through the comparison between the ultrasonic sensors and the signals of the fluorescent probe, whether the system is interfered by external environment to cause error judgment is judged. Furthermore, false alarm of the system is avoided. The partial discharge detecting system has the advantages of being simple in structure, facilitating networking, resisting to electromagnetic interference and the like.
Owner:STATE GRID CORP OF CHINA +1

Open-circuit fault detection method for three-phase inverter with phase-redundant fault-tolerant structure

InactiveCN103869208ASmall amount of calculationTolerate detection variable fluctuationsElectrical testingControl systemEngineering
The invention discloses an open-circuit fault detection method for a three-phase inverter with a phase-redundant fault-tolerant structure. The method comprises the following steps: normalizing a three-phase expected voltage to obtain a detection variable (dn) of the three-phase expected voltage; calculating to obtain a detection variable (an) according to an average value of an absolute value of the three-phase expected voltage; judging to obtain fault indications (Dn and An) through threshold values (km and kd) of the detection variable (dn) and the detection variable (an); searching and locating a switch tube having an open-circuit fault in a fault location table I according to the fault indications (Dn and An). Faults with three possibilities in the fault location table I can be further located by using a method of replacing a bridge arm, on which the switch tube determined to have the open-circuit fault is positioned, with a redundant fourth bridge arm. The method is applied to open-circuit fault detection of the three-phase inverter in a driving control system of an electric vehicle, at most 27 open-circuit faults can be detected, and an accurate basis is provided for fault-tolerant control and fault processing of the system.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Method for recognizing type of vibration source of tunnel, and vibration source positioning method

The invention discloses a method for recognizing the type of a vibration source of a tunnel, and a vibration source positioning method. The method for recognizing the type of the vibration source comprises the following steps: setting distance setting monitoring regions in the tunnel at intervals, wherein four corners of each monitoring region are respectively provided with a triaxial vibration sensor; collecting X-axis, Y-axis and Z-axis acceleration analog quantities of the triaxial vibration sensor in real time through the triaxial vibration sensor, and converting the acceleration analog quantities into digital quantities; carrying out the calculation and analysis of the monitoring data of the triaxial vibration sensor: building a vibration triggering algorithm; filtering background noises, judging the focus direction through longitudinal and lateral stationing combined analysis, and measuring the distance of a focus through a difference point of transverse and longitudinal wave propagation; and finally achieving an effect of precisely determining the focus. The method provides strong technological guarantee for the early warning and quick response of power safety production.
Owner:康威通信技术股份有限公司

Anomaly monitoring method and device based on transaction data

The invention relates to the field of e-commerce and discloses an anomaly monitoring method and device based on transaction data. The anomaly monitoring method comprises the steps that real-time transaction data of a monitored object is acquired, the real-time transaction data includes at least trading volume per second (TPS); the TPS group grade in scale grades to which the monitored object belongs to according to theTPS of the monitored object; a success ratestatisticsperiod and a transactionsuccess ratethreshold value of the monitored object are determined according to the TPS group grade of the monitored object; statistics is conducted on real-time transactionsuccess rates within the success ratestatisticsperiod of the monitored object according to real-time transaction data of the monitored object; the real-time transactionsuccess rates are compared with the transactionsuccess ratethreshold value are compared, if the real-time transactionsuccess rates are smaller than the transactionsuccess ratethreshold value, it is determined that transaction data of the monitored object is abnormal. The method aims at improving the anomaly judging accuracy and efficiency and solving the problem that abnormal situation recording fails, is false or is delayed in the prior art.
Owner:CHINA UNIONPAY

Car collision detection method and device based on three-shaft acceleration sensor

ActiveCN104021601ASolve the problem of high misjudgment rate of collision detectionImprove computing efficiencyRegistering/indicating working of vehiclesCollision detectionClassical mechanics
The invention discloses a car collision detection method and device based on a three-shaft acceleration sensor; the method is as follows: collecting three shaft acceleration values once by the three-shaft acceleration sensor in every scheduled time; reading current three shaft acceleration values of a car, performing arithmetic average processing on predetermined times of three shaft acceleration values before the current three shaft acceleration values of the car, calculating the average value of the predetermined times of three shaft acceleration values on each shaft; calculating the difference values between the current three shaft acceleration values of the car and the average value corresponding to each shaft, and judging whether the car collision happens according to the difference values and threshold. The car collision detection method and device can effectively suppress influences caused by abnormal sudden beats during sensor sampling, effectively avoid detection misjudgment caused by angle difference of equipment installation, and effectively inhibit collision detection misjudgment caused by normal acceleration and deceleration, and is high in accuracy and low in misjudgment rate.
Owner:SHENZHEN APICAL TECH CO LTD

Foreground segmentation method applied to mobile communication network transmission

The invention provides a foreground segmentation method applied to mobile communication network transmission and belongs to the field of image processing and communication network transmission. Five background templates with the shooting time intervals to be consistent with image acquisition intervals in the case of operation are pre-stored, and the former four background templates are used for fine detection in the case when a target is detected coarsely. The difference region area between the monitored image and the background image is calculated to judge whether a target enters, the image does not need to be transmitted when the target does not exist, the target region is segmented when the target exists, and the target region is only transmitted. The received target region is fused in the pre-stored background image by a server for video playing or image presentation. In a shooting mode, in order to prevent a passerby from being judged to be an obstacle, the target is set to be transmitted to the server only when the target is extracted by a third party according to the scene length, the human walking speed and the monitoring shooting frequency. Background replacement can be timely carried out after each time of segmentation cycle acquisition is finished, and interference caused by light and other environmental changes can be overcome in a slow transition way.
Owner:CHONGQING UNIV

3D machine visual forklift travelling auxiliary safety system and method

The invention discloses a 3D machine visual forklift travelling auxiliary safety system and method. The travelling state and peripheral operating environment of a forklift can be monitored in real time, and safety of personnel and assets in the forklift operation process is ensured. The system comprises an operating environment perceiving subsystem (1) formed by adopting a plurality of intelligent depth cameras as mains, a vehicle state monitoring subsystem (2) for collecting travelling states such as the speed, the posture and cornering of a vehicle, an output subsystem (3) for being connected with a vehicle power control assembly and controlling a braking control assembly, and an information processing subsystem (4) for logic control and intelligent judgment and recognition. According to the 3D machine visual forklift travelling auxiliary safety system and method, through the intelligent depth cameras and a plurality of sensors, the operating environment and the vehicle condition of the forklift are subjected to overall monitoring, obstacle detecting and warning can be provided, and through accurate recognition of personnel and objects, the functions of active personnel safety warning and controlling can be further achieved.
Owner:SHANGHAI UNIV

Method and system for monitoring oil-gas pipeline in mining subsidence area and system constructing method

InactiveCN102345793AReveal Security WarningReveal collapse featuresPipeline systemsUsing optical meansRelative displacementGas pipeline
The invention discloses a method and a system for monitoring an oil-gas pipeline in a mining subsidence area and a system constructing method. The method comprises the following steps of: monitoring axial strain of a pipe body with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring horizontal deformation of a soil body with a fiber grating sensor; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing horizontal deformation change of a soil body on the top of the pipe in the mining subsidence area, axial strain change of the pipe body and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the axial strain of the pipe body reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a horizontal deformation curve of the soil body changes suddenly, performing pipeline safety joint early-warning.
Owner:PETROCHINA CO LTD

Method and device for flexibly identifying residual current-type electrical fire on line

ActiveCN102354427AEliminate or indicate short circuit faultsAvoid Electrical Fire AccidentsFire alarm electric actuationEffective value measurementsInformation processingLow voltage
The invention relates to a method and device for flexibly identifying residual current-type electrical fire on line. The method comprises the following steps: arranging a residual current mutual inductor in a power transmission and supply circuit of a low-voltage power distribution system; obtaining an instantaneous value irz of lumped residual current in the circuit as well as waveform which areacquired by the mutual inductor through a power supply branch residual current and other signal detection unit; and according to the characteristics such as abrupt change, discontinuity and nonlinearity of a spot-heat agglomeration residual current instantaneous value ird, separating and extracting ird from irz by adopting a modern information processing technology, and calculating an effective value Ird of ird so as to identify whether potential electrical fire danger exists according to the size of Ird. The on-line identification device consists of three parts such as a residual current signal processing unit, the power supply branch residual current and other signal detection unit and an output execution unit. By adopting the residual current-type flexible on-line electrical fire identification method and device, the features of the potential electrical fire danger caused by electric arc grounding faults can be accurately extracted, normal residual current and abnormal residual current can be correctly identified, and alarm failure and false alarm can be avoided.
Owner:XIAN HIRATE NET ELECTRIC EQUIP CO LTD
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