74results about How to "Extended Tracking" patented technology

The invention provides a physical education teaching auxiliary system based on a motion identification technology and an implementation method of the physical education teaching auxiliary system. The system is applicable to a personal computer (PC) or an embedded host. The system comprises a movement data collection module, a movement data acquisition module, an identification and training module and a virtual teaching environment module. The device is characterized in that: a micro-inertia measurement unit and an inertia parameter extraction unit are arranged in the movement data collection module; and a movement information resolving unit transmits data which is output by the inertia parameter extraction unit to a multi-sensor data fusion unit for resolving. The movement situation of a target is reflected comprehensively in an inertia tracking mode and an optical tracking mode, so a tracking range is effectively expanded, measurement accuracy is improved, and the problems that the integral information of the target cannot be acquired in the inertia tracking mode, complicated movement identification cannot be performed and sensitivity is poor are solved. A brand new teaching mode is provided for physical education teaching, and a physical education teaching method is digitalized, multi-media and scientifically standardized.

The invention discloses a multi-laser-radar-based pedestrian target tracking method. The multi-laser-radar-based pedestrian target tracking method comprises the following steps that: a sensor network consisting of a plurality of single-line laser radars monitors a whole scene; at every sampling moment, the radars output footstep point distance data of pedestrians, and the data among different radars are unified at a coordinate system through system calibration; a footstep movement model of the pedestrians is built and pedestrian movement states are tracked through Kalman filtering so as to finally acquire a stable target trace and relevant statistical information. In the method, the laser radars are used as sensors, so that the defects of influence of illumination variance on an image sensor in the tracking method can be overcome and reliability is enhanced greatly; furthermore, the tracking range is wide, the algorithm speed is high, the number of tracked pedestrians is large, all movement modes of the pedestrians are compatible, such as standing, walking and jogging, and positions of the pedestrians can be detected effectively and movement traces of the pedestrians can be tracked in real time. The multi-laser-radar-based pedestrian target tracking method is applicable to occasions in which main movement targets are pedestrians.

The present invention relates to one kind of six-freedom visual tracking method and system based on microcomputerized parallel processing structure. The tracking process includes the following operation steps: 1) installing artificial marker onto the tracked target, 2) performing view field acquisition of the scene with the artificial marker with several video cameras to obtain the original image, 3) processing the obtained image in computer, and 4) completing the 3D reconstruction of the spatial position and direction of the artificial marker and outputting the reconstructed result via network communication equipment to various man-computer interaction system. The tracking system includes N microcomputers, N image acquiring systems, N network communication cards and one network exchanger. The method and system of the present invention can realize the precise location and tracking of spatial target and has less influence of electromagnetic interference and other advantages.

The invention provides an automatic monitoring method and system for open source component vulnerabilities. The automatic monitoring method comprises the following steps: scheduling crawlers to searchand capture data newly published by bug disclosure platforms at home and abroad; recording the grabbed data and updating the grabbed data to a local open source component vulnerability library; scheduling an open source component used by the fingerprint scanner detection system and service, recording a scanning result and updating the scanning result to an open source component database; matchingthe grabbed data with information in an open source component database to screen components with risks at present; and performing early warning on related responsible persons by a scheduling component vulnerability feedback recording mechanism. The automatic monitoring method can realize Automatic vulnerability early warning tracking and security construction, so that security personnel only needto pay attention to screened vulnerabilities related to products and companies. Therefore, the extra-large workload is saved, and the security vulnerability discovery and tracking efficiency is improved; the vulnerability tracking range is expanded; and the latest burst vulnerability can be responded within 24 hours, so that the company network security response timeliness is improved.

The invention provides a pressure wave signal generator and a real-time tracking and positioning method for a detector in a pipe. The pressure wave signal generator is arranged on a flange of the detector in the pipe, and the pressure wave signal generator generates signals when the pressure wave signal generator advances in the pipe along with the detector in the pipe; and the pressure wave signal generator comprises a power take-off gear, a supporting arm, a swinging arm, a first gear, a releaser, a spring, a movement pair, a screw rod, a reducer and a second gear. The method comprises the following steps that real-time pressure signals of the head end of the pipe and the tail end of the pipe are collected, and phase-space reconstruction is conducted; a pressure wave chaos state prediction model is constructed and trained, and a pressure wave chaos state real-time model and a pressure wave chaos state synchronous model are synchronously constructed; the arrival time of the pressure wave signals generated by the pressure wave signal generator to the head end of the pipe and the arrival time of the pressure wave signals generated by the pressure wave signal generator to the tail end of the pipe are detected; and the distance between the detector in the pipe and the tail end of the pipe is calculated. According to the pressure wave signal generator and the real-time tracking and positioning method for the detector in the pipe, real-time tracking and blockage positioning of the detector in the pipe are achieved, the tracking range is large, and the pressure wave signal generator and the real-time tracking and positioning method for the detector in the pipe are not limited by the buried depth of the pipe and the thickness of the pipe wall.

The present invention discloses a servo/manual control mixing-type three-degree-of-freedom light-small unmanned aerial vehicle remote sensing holder system. The system comprises two work modes of servo stabilization and manual control. The system comprises a structure system, a power system and a control system. The pedestal of the structure system is connected with an airplane through a vibration damper to isolated from the vibration of an aircraft wire; an orientation framework is supported by the pedestal to realize revolution in the range of +_130 degrees; a roll framework is supported by the orientation framework to realize revolution in the range of +_30 degrees; and a pitching framework is supported by the roll framework to realize revolution in the range of -90 to 30 degrees. The control system generates an instruction according to framework angular position and angular rate information provided by an attitude reference system, and the power system is configured to perform compensation of attitude errors and rate disturbance to realize stabilization of an imaging load visual axis and real-time tracking of an object; when a tracking angle is large, the manual remote operation is employed to realize large-angle rapid tracking; and the system is small in size, light in weight, fast in response and wide in tracking range, and can be suitable for systems with light and small unmanned aerial vehicle remote control, target tracking and monitoring, etc.

An apparatus and a method for achieving lock-in of a phase-locked loop (PLL) are disclosed. The PLL receives a reference clock and generates an output clock according to the reference clock. The method comprises: adjusting an oscillation frequency of a controlled oscillator of the PLL close to a desired frequency by counting the number of rising edges of a first clock in a number of a second clock cycles; aligning a rising edge of a third clock and a rising edge of a fourth clock by temporarily changing the oscillation frequency of the digitally controlled oscillator; and locking the phases of the third and fourth clocks by a phase detector of the PLL, wherein the first and the third clocks correspond to the output clock and the second and fourth clocks correspond to the reference clock.

An imaging device, an imaging method and a nonvolatile recording medium are provided. The imaging device includes an imaging unit having a pixel group two-dimensionally arranged vertically and horizontally, and configured to read pixel signals associated with generation of a frame image in units of lines by a rolling shutter system, and a drive unit configured to periodically switch, when a plurality of frame images are consecutively read from the imaging unit with a predetermined frame period in video recording, positions of a plurality of lines each of which is made a read object in each of the frame images in units of frames.

The invention relates to a tracking method and apparatus. The method comprises the steps of obtaining point cloud data of multiple moving points of a current frame; determining at least one moving target based on a clustering algorithm according to the point cloud data of the plurality of moving points of the current frame; associating the point cloud data of a plurality of moving points of the current frame with the moving target based on an adaptive association gate and a nearest neighbor data algorithm to obtain associated data; and obtaining a moving track of the moving target according tothe associated data, thereby realizing tracking of the moving target. On the basis of obtaining the point cloud data of the moving target through radar signal processing, the tracking range is expanded, the moving target is detected and tracked, and the trajectory information of the moving target is obtained, so that the accuracy of the tracking algorithm is improved.

The invention discloses an ultrasonic handle tuning method for a cataract ultrasonic emulsification instrument. In the tuning method, an ultrasonic handle in a cataract ultrasonic emulsification instrument is tuned through the amplitude frequency characteristics of a resonant network; the resonant network is composed of a first switching tube, a second switching tube, a not gate, an output transformer, a matching inductor and the ultrasonic handle; a CPU (Central Processing Unit) outputs a frequency signal to carry out frequency sweeping on the resonant network, the direct current power supply at both ends of the resonant network is monitored by an A/D (Analog to Digital) converter, and the frequency corresponding to the minimum voltage value of the direct current power supply is the initial resonant frequency output by the CPU; and in the working process of the ultrasonic handle, the minimum voltage value of the direct current power supply is tracked so as to track the resonant frequency of the ultrasonic handle. The invention also discloses a process for tracking the resonant frequency of the ultrasonic handle. The invention has the advantages of high anti-jamming capability, large tracking range and easy implementation.

The invention relates to a self-adaptive tracking probe applied to ultrasonic scanning detection on materials and structures. The probe comprises a guide plate, a fixing bolt, a guide plate fixing base, a guide sliding plate, a lower baffle, a fixing plate, a rotating seat fixing support plate, a tracking contact, an elastic pad, a spherical rotating seat, a rotating seat fixing base, a spherical rotating head, an energy converter connecting sleeve, an ultrasonic energy converter, a guide protecting sleeve and a rotating shaft. According to the self-adaptive tracking method, the probe is connected with an external scanning mechanism; the sound wave coupling contact of a front end of the ultrasonic energy converter with the lower end surface of the tracking contact is formed at the surface of a detected part; the probe is moved; and the tracking probe drives the ultrasonic energy converter and the surface of the detected part to be in the shape surface and position contact, so as to realize the self-adaptive tracking scanning of the ultrasonic energy converter to the shape surface of the detected part. By utilizing the self-adaptive tracking probe, the self-adaptive tracking capability and flexibility of the ultrasonic energy converter to a curved surface part of which the chord height of each meter is larger than 100mm can be greatly improved, and the tracking range of the ultrasonic energy converter is greatly enlarged.

The present invention provides a synchronous scanning circuit system based on PLL and DDS, which comprises trigger laser and a lens. The trigger laser is divided into two paths by the lens, wherein the optical path of one path of trigger laser is provided with a synchronous scanning strip camera, and the optical path of the other path of trigger laser is provided with a photoelectric converter and a synchronous scanning circuit. A trigger signal is converted to an electric pulse signal through the photoelectric converter and enters the triggering input end of the synchronous scanning circuit. The synchronous scanning circuit based on the PLL and DDS according to the invention mainly settles the following problems in an analog oscillating circuit: complicated structure, low integration degree and narrow synchronous tracking range.