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650results about How to "Reduce false alarms" patented technology

Traffic flow statistic and violation detection method based on surveillance video processing

The invention discloses a traffic flow statistic and violation detection method based on surveillance video processing. The method comprises the steps of obtaining a video source, reading a frame of image, judging if the current frame is a first frame, utilizing difference information of corresponding pixel points of the current frame and the previous frame to update foreground and background images if the current frame is not the first frame, utilizing the foreground and background images to extract an interest area MASK of the current frame, calculating integral images and integrated square images of the current frame, detecting in the interest area MASK of the current frame if a plate number target exists according to the obtained integral images and integrated square images of the current frame and utilizing an Adaboost algorithm, storing position information of the detected plate number target in a list TmpList, judging if the temporary target list TmpList is empty, judging if a tracking target sequence Track-List is empty if the temporary target list TmpList is empty, and adding the detected target in an ObjList into the Track-List if the tracking target sequence Track-List is empty. By means of the method, crossing traffic flow can be counted precisely, and if a vehicle target breaks the rule is judged combining indication of traffic signal lamps.
Owner:HUAZHONG UNIV OF SCI & TECH

System for real-time identifying urban traffic lights based on single eye vision and GPS integrated navigation system

The invention discloses a system for real-time identifying urban traffic lights based on single eye vision and a GPS integrated navigation system. The system establishes a map of traffic lights in an off-line manner through the methods of interactive image annotation, camera calibration, 3D position recovery, etc., and provides position coordinates and semantic attributes of the traffic lights under the globally positioned GPS coordinate system. Upon online detection, with the established offline map of traffic lights as a prior, an area of interest is determined by solving the substantial scope of the traffic lights in images in combination with the pose position, and the identification of the color segmentation and shapes of the traffic lights are carried out by using form information of the traffic lights in the area of interest. The system is applicable to road conditions and scenarios of different kinds, implements stable and long-distance detection sensing of the traffic lights under various environments. Since the system adopts a low-cost and low-power consumption navigation device, an image acquisition device and a computer platform, the system can be widely applied to the fields of vision navigation of driverless vehicles, vision auxiliary driving of intelligent vehicles, etc.
Owner:XI AN JIAOTONG UNIV

Residual error posterior-based abnormal value online detection and confidence degree assessment method

The invention discloses a residual error posterior-based abnormal value online detection and confidence degree assessment method. The method comprises the steps of collecting data, establishing time series data, performing linear fitting on the time series data to obtain a linear combination formula of data at a current moment and p pieces of previous data, and predicting a data value of subsequent time; comparing the predicted data value with an actually detected data value to obtain a predicted residual error series; determining a probability density function of the predicted residual error series by adopting a KDE (Kernel Density Estimation) method; performing posterior ratio check on the predicted residual error series, and judging whether the data at the current moment is an abnormal point or not; and by taking the time series data as an input, building an SOM state model, obtaining state series and state transition probability matrixes, defining an abnormal scoring function, and outputting an abnormal score. By comparing the probability that the data is the abnormal point with the probability that the data is a normal point, the abnormal value in the pollutant discharge concentration time series data is identified online, so that the accuracy and reliability of abnormal value judgment are improved.
Owner:JIANGSU FRONTIER ELECTRIC TECH +2

Longitudinal collision avoidance reminding and automatic following integration system and method

The present invention provides a longitudinal collision avoidance reminding and automatic following integration system and a method, and belongs to the vehicle collision avoidance field. The system comprises a collision avoidance mode selection unit, a sensing unit, a central control ECU unit, a reminding unit and an execution unit. The sensing unit obtains the type and number of front barriers, the position of a target vehicle in a lane line, the relative speed and the relative distance of an own vehicle and the front barriers, sends the obtained information to the central control ECU unit, carries out the comprehensive determination of a safe state by a D-S evidence theory, and finally determines the number of the front barriers, the relative distance vrel, the relative speed srel and an acceleration a of the own vehicle and the front target vehicle, thereby reducing the false alarm situations of a vehicle-mounted radar and a vehicle-mounted camera furthest. The central control ECU unit generates an instruction, and the reminding unit and the execution unit execute the correlated actions. The system and method of the present invention enable the false alarm rate to be reduced and the response speed and the comfort level of the drivers to be improved simultaneously, at the same time, satisfy the collision avoidance demands on different road conditions.
Owner:JIANGSU UNIV

An abnormal data detection method and device

The embodiment of the invention provides an abnormal data detection method and device, and relates to the technical field of data processing, and the method comprises the steps: obtaining to-be-detected data of a target object, traversing each random binary tree in an isolated forest model based on the to-be-detected data of the target object, and determining the position of the target object on each random binary tree; determining an abnormal score of the target object according to the position of the target object on each random binary tree, and then determining an abnormal condition of thetarget object according to the abnormal score of the target object. Due to the fact that the isolated forest model is adopted to detect the abnormal condition of the target object, dependence on manpower is reduced, and the detection process is simplified. When the isolated forest model is trained, the characteristics of the training sample at least comprise the time sequence characteristics of the target object, so that when the isolated forest model detects the abnormal condition of the target object, the influence of the time sequence characteristics of the target object on the abnormal condition is considered, the accuracy of abnormal detection is improved, and false alarms are reduced.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Maritime navigation rescue system based on Beidou satellite

The invention relates to a maritime navigation rescue system based on a Beidou satellite. The system utilizes the specific short message communication function of the Beidou satellite navigation system, after a ground command and control center receives a distress message sent by a ship, the short message communication function of the Beidou satellite navigation system can be used for getting in touch with the ship in distress, the authenticity of the distress message is confirmed, and false alarms are greatly reduced. Meanwhile, a ship-mounted terminal of the system is free from restrictions of external factors of distance, weather, sea conditions and the like due to the short message communication function of the Beidou satellite navigation system, and has functions of actively sending position information of the ship in distress at any time and conducting short message communication with the ground command and control center at any time. The ship-mounted terminal is stable and effective, can accurately and timely send distress messages, and is helpful for ground staff to position and track people in distress, and thus the rescue speed is accelerated. Furthermore, compared with existing ships with mutually-independent navigation systems and rescue equipment, the ship-mounted terminal of the system has functions of navigation and rescue at the same time.
Owner:SHENZHEN UNIV

Multi-sensor fusion type fatigue monitoring device system and monitoring method thereof

The invention provides a multi-sensor fusion type fatigue monitoring device system and a monitoring method thereof. A camera collects facial features of a monitored driver, and a millimeter-wave radaris used for collecting physiological sign parameters of the monitored driver; a signal processing module judges whether the driver is in a fatigue state through combination of the current physiological sign parameters and facial features of the driver, historical storage data and medical guidance data by virtue of a machine learning algorithm, acquires a judgment result and outputs the judgment result to a warning display module; a data storage module stores identity information of a monitored object, data, collected in the past, of the monitored object and medically accepted universal indexes; and the warning display module displays whether the monitored object is in the fatigue state at present and is capable of giving an alert. The multi-sensor fusion type fatigue monitoring device system can be used for recognizing each monitored object, so that the influence caused by individual sign differences to a detection result is reduced; and by utilizing multi-information fusion detection, the accuracy of the detection result is improved, and false-alarm phenomena are reduced.
Owner:四川宇然智荟科技有限公司

Airfield runway foreign object detection system

The invention relates to an airfield runway foreign object detection system which comprises laser scanning devices, imaging devices, an alarm device, a display device, a control system, and the like, wherein multiple groups of the laser scanning devices and the imaging devices corresponding to the laser scanning devices are provided as well as arrayed and arranged at both sides of an airfield runway; and laser scanning and imaging signals are transmitted to the control system and the display device through transmission lines. In the airfield runway foreign object detection system, the characteristic of high precision of laser is utilized, thus smaller foreign objects on the airfield runway can be detected, and the physical coordinate positions of the smaller foreign objects can be determined; and the imaging devices are used for providing visual and visible image information for staff so as to be convenient for confirming and processing alarm targets for the staff. The system can be used for monitoring the airfield runway around the clock for 24 hours without being influenced by environment, thereby false alarms are reduced. Meanwhile, the system can automatically carry out detection during the period of a regular flight without influencing the normal operations of the airport.
Owner:CIVIL AVIATION UNIV OF CHINA

Home-based care system based on body feeling network and control method thereof

ActiveCN106875629AOvercoming False Positive Technical BoundariesReduce false alarmsAlarmsTotal factory controlEngineeringEmergency medicine
A home-based care system based on a body feeling network and a control method thereof belong to the intelligent household service system technology field. A household body feeling network, a server and an intelligent mobile phone are included. The household body feeling network comprises a household sensor and a household wireless network. The household sensor comprises an infrared sensor, an access control sensor, an emergent button, an IP camera and a healthy watch. The household wireless network comprises a central controller and a wireless router. In the invention, a body feeling network environment is created in a family; through a plurality of sensors, a state of a senior citizen wearing the healthy watch is analyzed so that false alarm conditions are greatly reduced; according to an individual, alarm threshold correction is performed and a false alarm technology boundary of a single sensor is overcome; and a healthy and safe informatization monitoring system is provided for the home-based senior citizen. A remote monitoring informatization platform of children is erected so that a platform used for monitoring health of the senior citizen, monitoring household safety and communicating with the senior citizen is provided for the children.
Owner:CHANGCHUN WHY E SCI & TECH

Combined alarming method for on-line monitoring system for rotary machinery

ActiveCN104880247AFlexible settingsMultiple alarm parameters are set and the combination is flexibleSubsonic/sonic/ultrasonic wave measurementMonitoring systemAcousto-optics
The invention discloses a combined alarming method for an on-line monitoring system for rotary machinery. The method includes the following steps: selecting multiple parameters from vibration parameters and rate of change parameters of the vibration parameters, making the multiple parameters serve as monitored objects, and successively setting multiple alarming parameter combinations; reading basic monitor data in a database, and obtaining monitor values of the corresponding vibration parameters and the rates of change of the vibration parameters; successively reading the alarming parameter combinations from an alarming rule list, comparing the monitor values with corresponding trigger threshold values, triggering the alarming parameter combinations if all the monitor values exceed the trigger threshold values, and calculating the alarming level and the continuous trigger frequency of the alarming parameter combinations; and giving an acousto-optic alarm if the continuous trigger frequency of one alarming parameter combination is greater than a continuous alarming threshold value. Through adoption of the method, the alarming accuracy and the alarming efficiency are improved, false alarming is minimized, people can know the danger level, and then on-site workers can conveniently cope with the danger in time.
Owner:HUAZHONG UNIV OF SCI & TECH
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