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874results about How to "Accurate detection" patented technology

Self-adaptive intelligent traffic light and control method thereof

The invention provides a self-adaptive control method of an intelligent traffic light, which operates according to the following principle: extracting a situation of vehicles on lanes and pedestrians on pedestrian crossings through computer vision technology, and automatically controlling a traffic light according to the extracted situation. The intelligent traffic light comprises an image sampling module, an image processing and interpreting module, an arbitration control module and a warning light display module. The control method comprises the following steps: obtaining collected images of current vehicle areas and pedestrian areas through the image sampling module; obtaining foreground parts of current vehicles and pedestrians through background subtraction, extracting vehicle parts according to extraction edge features and pedestrian parts according to faces and shape features of the pedestrians, and calculating the density of vehicles and pedestrians in the corresponding area. If the vehicle density in the vehicle waiting area is higher than a threshold at a time, the traffic light allows pedestrians to pass; and if the pedestrian density in the pedestrian waiting area is higher than a threshold at a time, the traffic light allows vehicles to pass. If the vehicle density and the pedestrian density are both lower than another corresponding threshold at a time, warming light signals are changed according to the interval for the general situation. The invention is particularly applicable to crowd control during the peak period.
Owner:BEIHANG UNIV

Automated Measurement of Brain Injury Indices Using Brain CT Images, Injury Data, and Machine Learning

A decision-support system and computer implemented method automatically measures tee midline shift in a patient's brain using Computed Tomography (CT) images. The decision-support system and computer implemented method applies machine learning methods to features extracted from multiple sources, including midline shift, blood amount, texture pattern and other injury data, to provide a physician an estimate of intracranial pressure (ICP) levels. A hierarchical segmentation method, based on Gaussian Mixture Mode! (GMM), is used. In this approach, first an Magnetic Resonance Image (MRI) ventricle template, as prior knowledge, is used to estimate the region for each ventricle. Then, by matching the ventricle shape it) CT images to fee MRI ventricle template set, the corresponding MRI slice is selected. From the shape matching result, the feature points for midline estimation in CT slices, such as the center edge points of the lateral ventricles, are detected. The amount of shift, along with other information such as brain tissue texture features, volume of blood accumulated in the brain, patient demographics, injury information, and features extracted from physiological signals, are used to train a machine learning method to predict a variety of important clinical factors, such as intracranial pressure (ICP), likelihood of success a particular treatment, and the need and/or dosage of particular drugs.
Owner:VIRGINIA COMMONWEALTH UNIV

Sensor and Disturbance Measurement Method Using the Same

The present invention relates to a sensor or the like having a structure that enables accurate temperature measurement in a wide temperature range including a low-temperature region and is suitable for independently and accurately determining temperature variations and strains appearing in an object to be measured. The sensor comprises a laser light source, a sensor section that has a plurality of waveguides transmitting a laser light from the laser light source therethrough, a detecting section, and an analyzing section. The detecting section detects a plurality of Brillouin spectra obtained from the sensor section. The analyzing section determines at least one measurement value of a temperature in the sensor section and a strain generated in the sensor section, based on fluctuations of parameters defining the respective detected Brillouin spectra. In particular, the sensor section has a structure such that the variation of the Brillouin spectrum in response to a disturbance differs between the waveguides. Thus, by simultaneously monitoring the Brillouin spectra that varying a different manner in a plurality of waveguides, it is possible not only to measure accurately the temperature in a wide temperature range including a low-temperature region, but also to make distinction between the strain and temperature.
Owner:SUMITOMO ELECTRIC IND LTD

Vehicle-mounted sterilization system

The invention provides a vehicle-mounted sterilization system, belongs to the technical field of vehicle sterilization, and solves the problems that the traditional vehicle sterilization mode is time and labour-consuming has high sterilization cost. The vehicle-mounted sterilization system comprises a central processing unit, a power supply, an inching switch, a sterilizing lamp, a passenger detection device and a vehicle door state inductive switch, wherein the sterilizing lamp is connected with the central processing unit; the power supply supplies power to the sterilizing lamp and the central processing unit; the passenger detection device and the vehicle door state inductive switch are connected with the central processing unit; the passenger detection device is used for detecting whether no passenger is in the vehicle or not and inputting the corresponding signal to the central processing unit; the vehicle door state inductive switch is used for feeding back a vehicle door state to the central processing unit; and when the passenger detection device detects that no passenger is in the vehicle and the vehicle door state inductive switch senses that the vehicle door is closed, the central processing unit controls the sterilizing lamp to start sterilizing. The vehicle-mounted sterilization system of the invention has the advantages of safe and convenient use, good sterilization effect and the like.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

Earth borrowing device used for project supervision and earth borrowing method

The invention discloses an earth borrowing device used for project supervision and an earth borrowing method. The earth borrowing device and the earth borrowing method comprise a supporting frame and an earth borrowing tube, wherein a drill bit is arranged at the lower end of the earth borrowing tube; a driving device used for driving the earth borrowing tube to rotate and a lifting device used for driving earth borrowing tube to move up and down are arranged on the supporting frame; the earth borrowing tube is hollow, and a plurality of partition plates for isolating the interior of the earth borrowing tube into a plurality of holding cavities are sequentially arranged in the earth borrowing tube in the height direction of the earth borrowing tube; an earth borrowing hole is formed in the outer wall of each of the holding cavities; an earth borrowing door is articulated with each of the earth borrowing holes; each of the earth borrowing doors overturns in the rotation direction of the earth borrowing tube relatively to the earth borrowing tube; a driving mechanism used for driving the earth borrowing doors to open and close is also arranged in the earth borrowing tube. The earth borrowing device and the earth borrowing method have the advantage that the earth quality is detected more accurately by separating soil with different depths.
Owner:无锡建设监理咨询有限公司

Semi-vehicle mass simulation state based bogie hanging natural vibration characteristic test bed

InactiveCN102004041AAccurate detectionShorten the R&D cycleResonant frequencyRailway vehicle testingAir springElectro hydraulic
The invention relates to a railway vehicle bogie hanging natural vibration characteristic detection equipment, in particular to a semi-vehicle mass simulation state based bogie hanging natural vibration characteristic test bed. The test bed is mainly composed of a test bed positioning and auxiliary supporting device, a test bed excitation loading device and a semi-vehicle mass simulation loading device; wherein the test bed positioning and auxiliary supporting device is fixedly connected onto a test bed concrete foundation, the test bed excitation loading device is fixedly connected with a construction member on the test bed positioning and auxiliary supporting device, the semi-vehicle mass simulation loading device is connected with the swing bolster or air spring of a bogie to be tested and is fixedly connected with the construction member on the test bed positioning and auxiliary supporting device, the test bed can utilize a mass block to load the bogie, so as to achieve the aim of simulating semi-vehicle mass; and an electro-hydraulic servo system cooperatively controls actuators in different directions, so as to excite the bogie to be tested, thus meeting the requirement of natural vibration frequency test in bogie frame transverse, yawing, nodding and side rolling vibration modes.
Owner:JILIN UNIV

Special automatic fire extinguishing device for battery box

The invention discloses a special automatic fire extinguishing device for a battery box. The special automatic fire extinguishing device comprises a plurality of air suction type fire disaster detectors, at least two fire extinguishing agent containers, and a controller, wherein the air suction type fire disaster detectors are used for detecting whether the interior of each battery box catches a fire or not; the fire extinguishing agent output opening of each fire extinguishing agent container is connected with a fire extinguishing agent conveying pipe network; each fire extinguishing agent conveying pipe network comprises a main pipeline and a plurality of branch pipelines which are connected with the main pipeline; each battery box of a coach is connected with at least one branch pipeline; a first valve is mounted at the fire extinguishing agent output opening of each main pipeline or each fire extinguishing agent container; a second valve is mounted on each branch pipeline; the controller is connected with the air suction type fire disaster detectors, the first valves and the second valves, and controls whether each of the first valves and the second valves is opened or closed according to detecting results of the air suction type fire disaster detectors. According to the special automatic fire extinguishing device for the battery box, each battery box of the coach can be effectively protected one by one; the personal and property safety of passengers on the coach caused by fire spreading because a new energy coach catches a fire can be prevented.
Owner:CNBCC AUTOMOBILE SPARE PART XIAMEN

Method and device for detecting and assessing deposit in metal pipe

The invention provides a method for detecting and evaluating deposits in a metal tube and a device thereof. The method comprises the steps: 1) knocking the exciting part of the metal tube through an exciting device to excite acoustic waves capable of reflecting the pulse response characteristics of the structural body; 2) sending and acquiring the excited acoustic wave signals through a microphone and a data acquisition card; 3) recording sounds through an acquisition software and storing the sounds in a computer; 4) carrying out wavelet packet analysis, time domain analysis and/or spectrum analysis on the signals, computing characteristic parameters such as energy value of each spectrum, duration of time domain signal and/or maximum resonance frequency amplitude of spectrogram of the wavelet packet analysis; and 5) inputting the characteristic parameters into a neural network expert diagnosis system for identification, determining whether the deposits exist in the tube or not and quantifying the deposits, and evaluating the plugging degree in the tube according to the quantification result. The device comprises an exciting device, a microphone, and a computer having a data acquisition card, wherein the microphone is fixed at the metal tube, and the microphone and the data acquisition card are connected with the computer host respectively.
Owner:WUHAN UNIV
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