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216results about How to "Reduce false alarm rate" patented technology

Vehicle collision-proof early warning device

InactiveCN102785660ARealize collision avoidance warningReduce false alarm rateMicrowave radarUltrasound
The invention discloses a vehicle collision-proof early warning device, which is mainly and technically characterized in that the vehicle collision-proof early warning device comprises an image acquisition module, an image processing module, a millimeter microwave radar speed and distance measuring device, an ultrasonic sensor, a speed sensor, a brake sensor, an accelerator sensor, a steering sensor, a single-chip microcomputer and an early warning device, wherein the image acquisition module is used for acquiring information at the front of a vehicle and transmitting the information to the image processing module, the image processing module processes the information and then transmits the information to the single-chip microcomputer, the millimeter microwave radar speed and distance measuring device simultaneously transmits measured relative distance and relative speed between an ahead vehicle and the vehicle on which the vehicle collision-proof early warning device is installed to the single-chip microcomputer, the ultrasonic sensor transmits the measured speed of the vehicle on which the vehicle collision-proof early warning device is installed, the single-chip microcomputer processes the image information and the distance and speed data and then judges whether the vehicle is in a warning critical state or not, and finally a result processed by the single-chip microcomputer is displayed through the early warning device. The vehicle collision-proof early warning device has the advantages that the false warning rate of the early warning device is effectively reduced, the accidents such as rear-end collision are reduced and the transport efficiency is improved.
Owner:毛振刚

Multi-sensor fused comprehensive car alarm system

The invention relates to a multi-sensor fused comprehensive car alarm system which comprises a multi-sensor fusion module, a central processing module, a wireless communication module, a GPS (global position system) positioning module and an alarm device, wherein the multi-sensor fusion module is connected with the central processing module; the central processing module is connected with the alarm device and the GPS positioning module, and carries out interaction with a mobile phone of a car owner by the wireless communication module; the multi-sensor fusion module adopted by the invention comprises a microwave Doppler sensor, an acceleration sensor, a pyroelectric infrared sensors and a Hall switch element, so that the multi-sensor fusion module can carry out all-round monitoring on carinformation and cope with various theft means, thereby improving the security and reliability of the system, and reducing the rate of error alarming; the alarm device comprises an antiriot spray device, so that the car owner can remotely control a thief and subdue a thief on site; the wireless communication module supports video transmission, picture transfer and short message supervisioning; andmeanwhile, the car alarm system also has the GPS positioning module, thereby facilitating the position search of a car.
Owner:DALIAN UNIV OF TECH

Method and device for dynamic threshold anomaly traffic detection of DDOS (distributed denial of service) attack

The invention discloses a method and a device for dynamic threshold anomaly traffic detection of DDOS (distributed denial of service) attack. The method includes: acquiring historical data of anomaly traffic detection, and generating a traffic threshold above a tolerable line and a traffic threshold below the tolerable line of anomaly traffic detection according to the historical data of anomaly traffic detection; comparing a traffic value obtained by detection to the traffic threshold above the tolerable line and the traffic threshold below the tolerable line of anomaly traffic detection; if the traffic value is larger than the traffic threshold above the tolerable line or smaller than the traffic threshold below the tolerable line, sending out an anomaly traffic detection alarm. By the method and the device for dynamic threshold anomaly traffic detection of the DDOS attack, the traffic threshold above the tolerable line and the traffic threshold below the tolerable line can be generated effectively by utilization of the historical data, the defect of high difficulty in threshold determination in the process of anomaly traffic detection of the DDOS attack n the prior art is made up, accuracy of DDOS anomaly traffic detection is improved significantly through a statistics-based threshold determination method, and false alarm rate of anomaly traffic detection alarm is lowered.
Owner:HANDAN BRANCH OF CHINA MOBILE GRP HEBEI COMPANYLIMITED

System and method for front vehicle collision early warning based on visual sense

The invention discloses a system and method for front vehicle collision early warning based on a visual sense. The system comprises a vehicle front scene obtaining module, an effective area calculation module, a vehicle detection module, a vehicle positioning module and a collision early warning module. The vehicle front scene obtaining module is used for recording the real-time road condition scene in the front of the vehicle; the effective area calculation module is used for calculating projection positions of detection areas a bicycle road ahead of the vehicle and a left lane and a right lane which are adjacent to the bicycle road in an image; the vehicle detection module is used for detecting vehicles inside the effective areas and determining a vehicle candidate area; the vehicle positioning module is used for obtaining the confidence coefficient of the vehicle inside the vehicle candidate area and an accurate position of the lower rim of the front vehicle; and the collision early warning module is used for publishing early warnings of different levels according to the collision times. The system and the method are applicable to various server weathers, provide vehicle collision time, set the early warning level and timely and accurately make early warning prompt.
Owner:SHANGHAI OUFEI INTELLIGNET VEHICLE INTERNET TECH CO LTD

Network inbreak event association detecting method

The invention relates to a correlative detecting method of network intrusion events, which pertains to the network security technical field. In the correlative detecting method of the invention, an intrusion detecting system reports the intrusion warning information and stores all warning informations respectively into four database tables. Beginning from the attack of the fourth database table, each warning item in the fourth database table is searched and matched previous hacker attack behavior in the third database table which stores backdoor; if the searching and matching are successful, new searching and matching are carried out; the warning items in the third database table are searched and matched in the second database table which stores promotion authority; the process is analogized until warning items in the first database table are matched, and the results concerning successful matching are stored into the event database table after being associated; beginning from the fourth database table when all warning items are finished, the searching and matching are carried out from the third database table, the process is analogized till the first database table are matched. The correlative detecting method of the invention reduces false warning rate of intrusion event detecting system and improves the accuracy rate of reporting security event.
Owner:SHANGHAI JIAO TONG UNIV

Anti-theft alarm method and device for street lamp cable with self-checking function

The invention relates to the field of burglary prevention for street lamp cables and discloses an anti-theft alarm method for a street lamp cable with a self-checking function. An anti-theft front end is arranged in a substation control cabinet; the anti-theft front end provides a weak direct current for the street lamp cable at a time interval when a street lamp is not opened and switches the weak direct current into an alternating current for supplying power to the street lamp at a time interval when the street lamp is opened; the anti-theft front end detects the weak direct current and the alternating current on the street lamp cable to judge whether voltage and current are abnormal, determine types of abnormal states of the voltage and the current and transmit abnormal information of the front end simultaneously; and an anti-theft tail end is arranged in a terminal pole of the street lamp at the tail of the cable, and the anti-theft tail end judges whether a line is abnormal by detecting whether the voltage is present on the street lamp cable, transmits abnormal information of the tail end, and determines a fault result of the street lamp cable according to the front-end abnormal information of the anti-theft front end and tail-end abnormal information of the anti-theft tail end. The invention is applicable to anti-theft alarm for the street lamp cable.
Owner:XIAMEN INGOL DIGITAL TECH
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