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685results about How to "Improve real-time performance" patented technology

Visual localization and obstacle avoidance method and system for unmanned plane

The invention provides a visual localization and obstacle avoidance method and a visual localization and obstacle avoidance system for an unmanned plane. The method comprises the following steps that an unmanned plane-mounted camera acquires visual sensing information of the unmanned plane, and acquires inertial navigation data by an inertia measuring unit of the unmanned plane; a remote control system receives visual sensing information and inertial navigation data, and obtains obstacle information in a flight environment where the unmanned plane is positioned according to the visual sensing information; an external camera performs visual localization on the unmanned plane to obtain the position information of the unmanned plane; the remote control system plans the flight path of the unmanned plane according to the obstacle information and the position information of the unmanned plane, and generates a flight control command according to the inertial navigation data and the flight path; and the unmanned plane receives the flight control command to control the unmanned plane to avoid obstacles. According to the embodiment of the invention, the problems of visual localization and obstacle avoidance of the unmanned plane are solved, and the unmanned plane has the capability of completing visual obstacle avoidance by using the plane-mounted camera and a positioning camera.
Owner:TSINGHUA UNIV

Six-camera around looking-based cylindrical panoramic generation device and method

The invention provides a six-camera around looking-based cylindrical panoramic generation device and method. The device comprises a regular hexagonal prism enclosure; six cameras are horizontally and outwardly arranged at the centers of the six side surfaces of the regular hexagonal prism; and the six cameras are focus-fixed fisheye cameras with 90-degree horizontal view angles. The method comprises the following steps: capturing images of the six cameras simultaneously; carrying out distortion correction on the six images by using a reverse division model; carrying out cylindrical projection on the six corrected images; carrying out feature detection and matching on the adjacent images with superposed areas by using an SIFT feature point detection algorithm; calculating the image translation splicing parameters and determining the sizes of the superposed areas through the optimum matching point; carrying out image splicing and fusion simultaneously; and carrying out smooth transition on the public area by using a slow-in slow-out fusion method so as to finally obtain the naturally transitioned cylindrical panoramic images. According to the device and method, the natural panoramic images of 360-degree view can be efficiently generated, so that the device and method are suitable for panoramic monitoring.
Owner:NORTHEASTERN UNIV

Unmanned gyroplane moving target autonomous tracking device and control method thereof

The invention relates to the technical field of unmanned gyroplane autonomous tracking, in particular to an unmanned gyroplane moving target autonomous tracking device based on a pan-tilt camera and an airborne sensor. The unmanned gyroplane moving target autonomous tracking device comprises an aircraft and a ground station. The aircraft comprises an aircraft controller, an aircraft propeller motor connected with the aircraft controller, and a pan-tilt motor. The pan-tilt motor is connected with the pan-tilt camera. A wireless image transmission module and a wireless data transmission module are arranged between the aircraft and the ground station. The aircraft and the ground station are connected through the wireless image transmission module and the wireless data transmission module. Images obtained by the airborne pan-tilt camera serve as input of a system, coordinates of a target in the images are obtained on the ground station through a Struck algorithm, modeling is conducted on the coordinates of the target through a uniformly accelerated motion (CA) model, the control quantity of a pan-tilt is designed according to the coordinates, estimated through modeling, of the target, and accordingly tracking instantaneity and smoothness of the pan-tilt camera are guaranteed.
Owner:SUN YAT SEN UNIV

A convolutional neural network accelerator based on calculation optimization of an FPGA

The invention discloses a convolutional neural network accelerator based on calculation optimization of an FPGA. The convolutional neural network accelerator comprises an AXI4 bus interface, a data cache region, a pre-fetched data region, a result cache region, a state controller and a PE array. The data cache region is used for caching feature map data, convolution kernel data and index values read from an external memory DDR through an AXI4 bus interface; The pre-fetched data area is used for pre-fetching feature map data needing to be input into the PE array in parallel from the feature mapsub-cache area; The result cache region is used for caching a calculation result of each row of PE; The state controller is used for controlling the working state of the accelerator to realize conversion between the working states; And the PE array is used for reading the data in the pre-fetched data area and the convolution kernel sub-cache area to carry out convolution operation. The accelerator utilizes the characteristics of parameter sparsity, repeated weight data and an activation function Relu to end redundant calculation in advance, so that the calculation amount is reduced, and the energy consumption is reduced by reducing the access memory frequency.
Owner:SOUTHEAST UNIV +2

Aerial shooting traffic video frequency vehicle rapid checking method

An aerial photography transport video vehicle rapid detection method comprises the steps that: step 100, the space-based coding part adopts the global motion estimation to determine the global motion vector of a background; step 200, the residual difference value is calculated according to the global motion vector to divide background regions and motion regions; step 300, whether the regions are the background regions or not is judged, an image of which the regions are all the background regions is changed to the next frame, and the step 200 is executed; otherwise, the motion regions of the image execute the step 400; step 400, the ground part firstly determines a self-adaptive gradient threshold which is lower and can correctly divide various objects to carry out the primary marker extraction; then two parameters of an area and a water collection depth are introduced for further screening of the extracted marker, thus determining a final marker point; then the marker point is taken as the region minimum value for carrying out the VS watershed division; finally, the regions are merged according to the texture information of the regions; step 500, the shadow is detected in an HSV color space, thus filtering out phony targets and finally detecting vehicles. The method of the invention solves the problems that the calculation amount during the decompression of the aerial photography image and the detection of motion targets is greater, and the real-time property and the robustness requirement are difficult to be satisfied at the same time.
Owner:BEIHANG UNIV

Linear test machine of capacitance touch screen

The invention relates to a linear test machine of a capacitance touch screen, which comprises a working platform, a movable touch and scratch device and a control system, wherein the capacitance touch screen to be measured can be placed at the top surface of the working platform, and the control system is connected with the movable touch and scratch device by a data line and can receive the output of the capacitance touch screen to be measured by a serial port. The linear test machine of the capacitance touch screen is characterized in that the movable touch and scratch device comprises an X-direction movement device, a Y-direction movement device, a Z-direction movement device and an induction pen device, wherein the Y-direction movement device is arranged on the working platform and can carry out linear back-and-forth movement in a Y direction on the working platform; the X-direction movement device is arranged on the Y-direction movement device and can carry out linear back-and-forth movement in an X direction; the Z-direction movement device is arranged on the X-direction movement device and can vertically slide up and down; and the induction pen device is arranged at the X-direction movement device and can touch and scratch the capacitance touch screen to be measured. The invention has high test accuracy and real-time property, simple structure and convenient use and can carry out accurate and comprehensive linear test on the capacitance touch screen.
Owner:EELY ECW TECH

System for realtime and accurate observation and analysis of table tennis rotating and system operating method

ActiveCN103019024AImprove real-time performanceHigh precisionImage analysisHigh-speed photographySpatial movementKalman filter
The invention discloses a visual system for realtime and accurate observation and analysis of table tennis rotating and a system operating method, wherein the system is composed of the following modules: an image acquisition and table tennis target identification and location module, a table tennis space motion KALMAN filter module, a pan-tilt motion plan and control module, a table tennis mark recognition and three-dimensional reconstruction module, a table tennis rotating motion particle filter module and a three-dimensional virtual scene reproduction module. The biggest characteristic of the system for the realtime and accurate observation and analysis of the table tennis rotating disclosed by the invention is that the system can observe and analyze the rotating information of the table tennis in real time, to obtain a rotating state of the table tennis on the basis of the space motion of the table tennis, so that abundant and complete table tennis track information is obtained; and the system is still quite high in realtime performance, to provide abundant and accurate information for athlete training and teaching, game realtime judgment and live broadcast, and timely response of an online decision-making automatic system. By introduction of observation and analysis on internal motion of the target, the accuracy of the target motion state estimation and predication is improved, so that the system can be popularized in other operation projects, civil, military and other similar scenes in a relatively scientific manner.
Owner:ZHEJIANG UNIV

Co-phasing control device and control method for spliced telescope

The invention relates to a co-phasing control device and control method for a spliced telescope.The device comprises a spliced telescope body, a first beam splitter, a wavefront detector, a second beam splitter, a translation error detector and a wavefront controller, wherein the first beam splitter receives emergent rays and generates first divided beams and second divided beams; the wavefront detector detects the first divided beams and obtains system aberration data and wavefront distortion aberration data of transmission paths of all spliced sub mirrors; the second beam splitter receives the second divided beams and generates third divided beams and fourth divided beams; the translation error detector detects the third divided beams and collects dispersion interference fringes between each pair of spliced sub mirrors; the wavefront controller is connected with the wavefront detector, the translation error detector and a driver of a secondary separating deformable mirror.By means of the co-phasing control device and control method for the spliced telescope, real-time detection and compensation and correction of translation, inclination and higher order aberration can be effectively achieved, and compared with the technology in a current similar system, better accuracy and instantaneity are achieved.
Owner:SHANGHAI ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI

Trolley capable of automatically following mobile terminal to walk

The invention discloses a trolley capable of automatically following a mobile terminal to walk. The trolley comprises a master control chip, an electronic compass module used for measuring azimuth information of the trolley, a bluetooth module used for transmitting azimuth information of the mobile terminal to the master control chip, an ultrasonic ranging sensor used for measuring distance difference between the trolley and the mobile terminal, a DC deceleration motor used for controlling the trolley to move forward or backward according to the distance difference and a steering engine used for controlling the steering angle of the trolley, wherein the electronic compass module, the bluetooth module, the ultrasonic ranging sensor, the DC deceleration motor and the steering engine are respectively connected with the master control chip. The steering angle of the trolley is calculated by the master control chip according to the difference value of the azimuth information of the trolley and the mobile terminal, and the calculation result is outputted to the driving circuit of the steering engine. Speed of the trolley is controlled by the DC deceleration motor after ultrasonic ranging, the azimuth information difference between the trolley and the mobile terminal is calculated after the electronic compass module acquires the azimuth information and finally the steering angle of the trolley is controlled by the steering engine so that the trolley has advantages of being high in real-time performance, easy to realize and low in cost.
Owner:广州三合置地有限公司

Remote and safe intelligent household monitoring method and device based on visual analysis

The invention discloses a remote and safe intelligent household monitoring method and a device based on visual analysis. The method comprises steps: an indoor video image is acquired; one frame in the video image is extracted at an interval for household equipment recognition, and the operation state is judged; according to the acquired video image, whether a moving object exists is analyzed, in the case of existence, the moving object is tracked and photographed, and a high-definition picture of the object is acquired; the acquired high-definition picture is actively sent to a remote terminal, the high-definition picture is analyzed locally and the type of the moving target is recognized; the type is judged, if the moving object is a human being, and whether the human being is the resident is judged through face recognition; and according to the judgment result, a danger level is judged and corresponding information or alarm information is sent to the remote terminal. The device comprises a camera, an image processor, a controller, a data transmitting and receiving device and the remote intelligent terminal, wherein the remote terminal is connected with an information transmission device via Internet. The method and the device have the advantages of high real-time performance, wide application range, and easy mounting and maintenance.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Sulfur hexafluoride gas-filled type current transformer insulation state on-line monitoring system and method

The invention discloses a sulfur hexafluoride gas-filled type current transformer insulation state on-line monitoring system and method. A first switch solenoid valve of the current transformer is connected to a pressure stabilizing valve. An output terminal of the stabilizing pressure valve is connected to an infrared sensor and an electrochemical sensor. The electrochemical sensor is connected to a pressure pump through a second switch solenoid valve. The pressure pump is connected to a pressure regulating valve. The pressure regulating valve can communicate with a gas supplementing port of the transformer. The first switch solenoid valve can communicate with the gas supplementing port of the transformer. The method comprises steps that: a first hand-operated valve and a second hand-operated valve are opened, and the first switch solenoid valve is opened; when the pressure in the pressure stabilizing valve reaches one time the atmospheric pressure, the first switch solenoid valve is closed; SF6 purity and SO2 content in a gas sample are measured; the second switch solenoid valve is opened; the pressure pump is opened; the pressure regulating valve is opened, and the gas is delivered back to the current transformer; the second switch solenoid valve is closed; and the pressure pump is closed. With the monitoring system and the method provided by the invention, on-line monitoring is realized with good real-time performance. Tested gas sample is delivered back to the gas-filled type current transformer, such that gas loss and atmosphere pollution are reduced.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1

On-board data management system self fault-tolerance method

The invention relates to an on-board data management system self fault-tolerance method. A on-board data management system self fault-tolerance mechanism is divided into three levels: data fault tolerance, part level fault tolerance and system level fault tolerance, and the operations are sequentially carried out during the fault tolerance. The data fault tolerance comprises three aspects: data protocol verification, 1553B bus interface fault tolerance and RS422 bus fault tolerance. The part level fault tolerance comprises three aspects: random-access memory (RAM) chip fault tolerance, software watchdog fault tolerance and signal clock fault tolerance. The system level fault tolerance comprises two aspects: data management computer self switching fault tolerance and remote placing unit self switching fault tolerance. The method provided by the invention provides the fault tolerance at the data level, the part level and the system level, and the fault tolerance processing can be carried out on the data, the main function module and the single machine equipment. Through the layered fault tolerance processing, the respective fault tolerance on faults at different harm degrees can be realized. Through the layered fault tolerance processing, the cost caused by faults at a low harm degree can be reduced, and the reliability is also improved because corresponding fault tolerance measures are respectively adopted for various faults.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

Human body action real-time identification method based on infrared image

The invention discloses a human body action real-time identification method based on an infrared image, and relates to the technical field of human body action recognition, and the method comprises the following steps: constructing an infrared image human body posture extraction network and an action recognition network based on skeleton features; acquiring an infrared pedestrian image data set and preprocessing the infrared pedestrian image data set, training an infrared image human body posture extraction network based on the preprocessed infrared pedestrian image data set, and obtaining a human body dynamic skeleton feature image; segmenting a region-of-interest sequence of the human body dynamic skeleton feature image, and training an action recognition network by utilizing a segmentation result; and acquiring a to-be-recognized infrared image, and performing action classification and prediction on the preprocessed to-be-recognized infrared image based on the infrared image human body posture extraction network and the action recognition network. According to the invention, the problems of poor real-time performance and low recognition rate of an existing behavior recognition method generally aiming at a visible light environment and performing human body behavior action recognition through an infrared image in a dark environment at night or in a severe weather environmentare solved.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
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