385results about How to "Acquisition stable" patented technology

A method for processing received radio signals that are subject to unwanted change during propagation through the atmosphere, from a transmitter to a receiver array. The multiple signals are received as cochannel signals at the antenna array, and are processed to eliminate the effects of modification of the signals during propagation, wherein the processing step includes cumulant-based signal recovery without regard for the geometrical properties of the antenna array. In the invention as disclosed, two different information signals having two different polarization states are transmitted, and at least one of the transmitted signals is subjected to an unwanted change of its polarization state. The received signals are processed to separate and recover the two information signals without regard to their polarization states.

The invention is a network-based multimedia synchronous teaching system in the field of network technique, comprising: audio/video collecting tool, electronic document collecting tool, synchronous teaching support platform, and synchronous courseware browsing tool, where the audio/video collecting tool takes charge of collecting and compressing audio/video signals in the schoolteaching field and transmitting the compressed audio/video signals to the synchronous teaching support platform; the electronic document collecting tool takes charge of real-time collecting on-screen schoolteaching data of a teacher and compresses them into web pictures and transmitting the web picture to the synchronous teaching support platform; the synchronous teaching support platform receives the compressed and packet audio/video schoolteaching field data and receives the on-screen schoolteaching data, and synchronously organizes audio data, video data and on-screen data and after fluidizing, provides living broadcast service for the synchronous courseware browsing tool and provides programme ordering service. The invention achieves the characters of powerful functions, high efficiency and short cut, simple and convenient operation, friendly man-machine interface, etc.

The utility model discloses a robot navigation system and a navigation method. The robot navigation system comprises a navigation network which is formed by a plurality of wireless access points, a wireless communication module which is used for transferring data and collecting the intensity sequence communicated with the wireless access points, a sensor which is used for checking that the robot meets barriers or not, and a position server which is used for storing the referenced intensity sequence and running the intricate position arithmetic, and is characterized in that the position server is connected with the wireless communication module and interacts with the navigation network. The navigation method is characterized in that the robot judges the next target position until reaches the destination by comparing the intensity sequence collected in real time with stored reference intensity sequence of the position points; when the robot meets barriers, the robot records and demarcates the intensity sequence of the position in order to avoid entering the position again, therefore achieving intellectual learning; the robot can upload the correlative information to the position server and achieve the assistant navigation position by the help of the database of the position server and the position arithmetic. The utility model is not likely to be affected by the environment and also has the advantages of low cost of maintenance.

The invention discloses a roadside parking management method, device and system based on cameras. Based on the stable visual angle, the focal length, and the high-speed continuous stable image acquisition of array cameras, the method, device and system, by dividing, detecting, recognizing and tracking roadside parking monitoring area images photographed by the array camera, determine vehicles entering and exiting respective image areas at the same time to determine the information for each parking event. When a single camera misses the capture of an image indicative of the entrance and exit ofthe vehicle, the method performs detecting, recognizing and tracking to obtain a result by using images captured by other array cameras, and supplements the missing parking event information to improve the accuracy of obtaining parking event information. Compared to a method of using a dome camera to capture and manage the parking events, the method, device and system provided by the present invention can improve the management efficiency of the roadside parking events without consideration of the influence of the response time of the dome camera.

The invention discloses a distributed real-time news information acquisition system, and the architecture of the system comprises a central server, a plurality of sub-acquisition nodes and a database server, wherein each sub-acquisition node is responsible for acquiring a news page, communicating with the central server through TCP/IP (transmission control protocol/Internet protocol) and transmitting the acquired news page to the central server, and the central server is used for storing all the downloaded news pages into the databse server. The system can overcome the defects of the prior art and is mainly used for performing high-efficient and stable acquisition against the characteristics of a large amount of news data, fast updating speed and high repeatability; furthermore, the cost is low, and the deployment is easy.

There are provided a face image pickup device and a face image pickup method which can stably acquire a face image by appropriate illumination, and a program thereof. The face image pickup device comprises a camera which picks up an image of a face of a target person, an illumination light source which illuminates the face of the target person with near-infrared light having an arbitrary light amount, and a computer. The computer detects an area including an eye from the face image of the target person picked up by the camera. The computer measures a brightness distribution in the detected area. Thereafter, the computer controls the illumination light source so as to change the amount of near-infrared light based on the measured brightness distribution.

The invention relates to a railway locomotive running attitude measuring method comprising the following steps: a high-speed camera is fixedly arranged on at least three non-colinear points of the railway locomotive under measurement by taking surfaces of rails as the measuring datum; along with the running of the railway locomotive under measurement, the high-speed camera shoots the running imagesequence of an counterpart camera arranged on the top surface of the rails; the running image sequence of the counterpart camera is processed and analyzed, and the offset of each point relative to the rails is obtained; the special attitude and the offset of the railway locomotive under measurement relative to the two rails are determined according to the offset of three measuring points, and accordingly the dynamic offset of any point which is fixedly connected with the railway locomotive under measurement is obtained; the dynamic envelop curve of the railway locomotive under measurement isobtained according to the dynamic offset of the key point on the profile of the railway locomotive under measurement; the dynamic envelop curve is compared with the building profile, and the ultralimit early warning and alarming is carried out if a monitoring point is close to or exceeds the building clearance. The invention ensures the railway locomotive running attitude measuring precision whenthe dynamic displacement of the railway locomotive is measured on line in real time.

A sub-pixel edge of an ellipse target positioning method mainly relates to a image processing and machine vision such as calculation of accurate parameters and calibration and matching of a pick-up camera of the ellipse target and the like, the method is mainly divided into three main steps: the first step includes noise elimination of images, edge detection by Sobel operators and extraction of edge points of the ellipse target; the second step includes calculation of geometric parameters of the ellipse target; and the third step includes position of the sub-pixel edge, wherein, the position of the sub-pixel edge can be divided into four parts of calculating target grayness and background grayness of the edge model, calculating edge angles, calculating the distance between edge points and real edge points and calculating accurate position of sub-pixel edge points. The sub-pixel edge of positioning method comprehensively utilizes geometric parameters of the ellipse target, distribution characteristics of grayness of the ellipse target and two-dimensional edge models. The method not only effectively improves the accuracy and the robustness of the edge positioning, but also greatly reduces arithmetic quantity so as to enhance the rapidity.

The invention relates to an apparatus and method for measuring elastic turbulence characteristics of a viscoelastic polymer in a porous medium, wherein a side connector of a fluorescent microscope of the apparatus is connected to a CCD (couple charged device) camera, a saline container, a polymer solution container and a synthetic oil container that are connected with an oil/water container are parallelly connected between an inlet of a micro metering pump and an inlet of a two-dimensional mesh microscopic simulation model, the two-dimensional mesh microscopic simulation model is provided with an inlet pressure sensor and an outlet pressure sensor, and a light guide arm of a micro field particle image speed-measuring system is positioned right above the two-dimensional mesh microscopic simulation model; all the micro field particle image speed-measuring system, the fluorescent microscope, the inlet pressure sensor and the outlet pressure sensor are connected to a data graphic data station. The apparatus and method are capable of effectively recognizing elastic turbulence of viscoelastic polymer solution in porous medium seepage, and providing qualitative and quantitative description for elastic turbulence characteristics.

The invention discloses high-precision vegetable and fruit quick intelligent selecting equipment. The high-precision vegetable and fruit quick intelligent selecting equipment comprises a feeding conveying device, a horizontal conveying device and a pneumatic mechanism, wherein a horizontal conveyer belt comprising rollers is arranged on the horizontal conveying device; one or more groups of screening and discharging mechanisms which are opposite to the pneumatic mechanism in an up and down manner are arranged above the horizontal conveying belt; each screening and discharging mechanism comprises a discharging platform which is fixedly arranged above the horizontal conveying device; anti-falling baffles are respectively arranged on the front side and the rear side of each discharging platform; a rotational flow cover is arranged on each discharging platform; the side edge of each rotational flow cover is arc-shaped; a substandard product blowing-out opening is formed by two side edges of each rotational flow cover and two side edges of the corresponding discharging platform; each substandard product blowing-out opening is in up-and-down correspondence with air jet holes of the pneumatic mechanism. According to the high-precision vegetable and fruit quick intelligent selecting equipment disclosed by the invention, the screening and discharging mechanisms adopting special structures, a feeding and conveying device and rollers in the horizontal conveying device are arranged, the effects of positioning and precise photographing of vegetables and fruits are increased in an omnidirectional manner, and the screening efficiency is also greatly improved.

The invention relates to a gateway measurement acquisition and operation maintenance management system and application thereof. The gateway measurement acquisition and operation maintenance management system comprises a data integration module, a fault analysis module, a fault processing module, a fault feedback module, a quality evaluation module and a database for storing related data. The fault operation maintenance closed-loop process is formed by the fault analysis module, the fault processing module, the fault feedback module and the quality evaluation module and a fault analysis algorithm is corrected by the fault feedback module and the quality evaluation module. Data of each safety area is synchronized by data integration; the fault analysis can rapidly determine a fault type so as to carry out fault processing in a targeted manner; aiming at a new fault generated by the fault analysis module, fault processing arranges a processing manner after the system is tasked; the quality evaluation functional module is used for carrying out quality evaluation and establishing a fault processing experience base and correcting the fault analysis algorithm so as to ensure timely, correct and stable acquisition on gateway data.

The invention discloses an acquisition system and an acquisition method for a stereoscopic video. The system comprises acquisition equipment, a microcontroller, an acquisition server and stereoscopic display equipment, wherein the acquisition equipment comprises a plurality of two-dimensional (2D) cameras and a plurality of altitude regulation devices; a 2D camera is opposite to each altitude regulation device; the 2D cameras are linearly arranged, and are used for shooting planar video images; the microcontroller is connected with the acquisition equipment through a general purpose input and output port of each 2D camera, and is used for transmitting a pulse signal to the 2D cameras to control the 2D cameras to synchronously shoot the planar video images with preset frame frequency; the acquisition server is connected with the acquisition equipment through a data port of each 2D camera, and is used for acquiring the planar video images shot by the 2D cameras, geometrically calibrating the 2D cameras, and performing real-time geometrical correction and stereoscopic image synthesis on the planar video images shot by the 2D cameras; and the stereoscopic display equipment is used for receiving and stereoscopically displaying a stereoscopic image synthesized by the acquisition server. The system has real-time data acquisition capability, high flexibility and good stereoscopic perception effects.

The invention discloses a wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique comprises a visible channel and an infrared channel, wherein a light beam within the view field of the visible channel enters an optical system and then is reflected by an off-axis three-mirror primary mirror and an off-axis three-mirror secondary mirror to reach a third mirror in the visible channel, and after the exit pupil of the visible channel is filled with the reflected light beam, an image is formed at the position of the focus plane of the visible channel; a light beam within the view field of the infrared channel enters a third mirror in the infrared channel after being reflected by the off-axis three-mirror primary mirror and the off-axis three-mirror secondary mirror, the light beam reaches an intermediate-wave-and-long-wave color separation filter, a light beam in the intermediate wave view field is reflected through the front surface of the color separation filter, and an image is formed on the focus plane of an intermediate wave after the reflected light beam penetrates through an intermediate wave combined optical filter; a light beam in the long wave view field perpetrates through the intermediate-wave-and-long-wave color separation filter and then penetrates through a long wave combined optical filter, and then an image is formed on the focus plane of a long wave. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique has the advantages of being simple in structural mode, compact in structure, small in size, low in weight, large in number of spectrums, wide in spectrum section range, and capable of achieving wide-range, all-weather and high resolution dynamic monitoring.

The invention relates to a soil three diameter measuring method, which is as follows: the water content and electrical conductivity of the soil are calculated by measuring high frequency signals and an alternating voltage formed by the superposition of reflected signals formed on a probe; the soil temperature information is obtained by a temperature pickup arranged in the probe; the obtained electrical conductivity is calibrated; therefore, the measurement of the soil three diameter is finished. The soil three diameter measuring system comprises a signal generation unit, a transmission unit, the probe, a signal processing unit, and a control unit; wherein, the signal generation unit is used for transmitting high frequency signals of fixed frequencies. The probe is used for forming the reflected signals after receiving the high frequency signals and is provided with the temperature pickup. The signal processing unit is used for processing and treating voltage signals. The control unit is used for calculating the water content and electrical conductivity of the soil according to an embedded formula and calibrating the electrical conductivity according to the soil temperature information. The method and the system of the invention have fast measuring speed, high precision, strong anti-soil type and salt content influent capability, wide application range and low production cost.

The invention discloses a carbon carrying capacity detection method, equipment, a storage medium and a device. The actual pressure difference value of an inlet and an outlet of a gasoline engine particulate filter GPF and the current exhaust flow of an engine are firstly acquired, the model pressure difference value is calculated according to the current exhaust flow, pressure drop of the GPF is obtained according to the actual pressure difference value and the model pressure difference value, the pressure difference index is obtained according to the pressure drop and a preset pressure drop and pressure difference index model, pressure difference conversion and calibration are carried out according to the pressure difference index, and the carbon carrying capacity of the GPF is obtained.A carbon carrying capacity model cannot accurately and stably acquire the carbon carrying capacity in the prior art, by means of the method, the pressure difference index is obtained through the pressure drop relation of the actual pressure difference value and the model pressure difference value, the carbon carrying capacity of the GPF is further obtained, and therefore a GPF carbon carrying capacity estimation and calculation model can accurately and stably acquire the carbon carrying capacity in the GPF.

A high resolution stereo mapping and reconnaissance integrated camera optical system comprises a high resolution stereo detection branch and a laser ranging branch, wherein the high resolution stereo detection branch and the laser ranging branch adopt a shared primary mirror and a shared secondary mirror, adopt independent subsequent optical paths and independent optical elements, and form two independent optical branches. The two branches are different in field angles of incident light rays, a field out of an axis is utilized by the high resolution stereo detection branch, a field on the axis is utilized by the laser ranging branch, the light rays in the field of the two branches simultaneously reach the primary mirror and the secondary mirror, a light beam of the high resolution stereo detection branch passes though four aspheric surface reflecting mirrors and then reach a high resolution stereo detection focal plane to be imaged, and a light beam of the laser ranging branch passes through the primary mirror and the secondary mirror, then passes through an optical filter and laser relay lens set and then is converged on a laser focal plane. The high resolution stereo mapping and reconnaissance integrated camera optical system has the advantages that resolution is high, distortion is zero, an optical-mechanical structure is high in integration level, the size is small and the weight is light. The high resolution stereo mapping and reconnaissance integrated camera optical system achieves high resolution, high precision detection and stereo ranging mapping functions for large-range surface features.

The invention discloses a spatial light beam compression multichannel imaging optical system with a large field of view. The system comprises an off-axis three-mirror light beam compression afocal telescopic system, a second replicating mirror (5), a first color separation filter (6), a second color separation filter (7), a visible and near infrared relay lens group (8), a visible and near infrared focal plane device (9), a short wave relay lens group (10), a short wave focal plane device (11), a long wave relay lens group (12) and a long wave focal plane device (13), wherein the afocal off-axis three-mirror light beam compression optical system comprises a primary mirror (1), a secondary mirror (2), a first replicating mirror (3) and a third mirror (4). A target radiating light beam is compressed by the afocal off-axis three-mirror light beam compression optical system, emergent parallel light beams pass through the color separation filters and enter following visible and near infrared channel, medium wave channel and long wave infrared channel, and images are formed on focal planes of the channels by the relay lens groups of the channels. The optical system has the advantages that the optical system is large in field of view and relative aperture, wide in spectral range and easy to machine, assemble and adjust, and the like.

The invention discloses a carotid artery three-dimensional image building device. The carotid artery three-dimensional image building device comprises a handheld scanning auxiliary device, an ultrasonic probe, an image frame capture module and a processing system. The ultrasonic probe is fixed to the handheld scanning auxiliary device; the handheld scanning auxiliary device drives the ultrasonic probe to move to enable the ultrasonic probe to be capable of continuously and stably collecting carotid artery two-dimensional slice images at different positions at a first speed; the ultrasonic probe is connected with the image frame capture module through a first data connecting line; the image frame capture module collects the carotid artery two-dimensional slice images transmitted by the ultrasonic probe at a second speed and transmits the collected carotid artery two-dimensional slice images to the processing system through a second data connecting line; the processing system extracts the carotid artery two-dimensional slice images collected by the image frame capture module at a third speed; and the carotid artery two-dimensional slice images are built into carotid artery three-dimensional images. By means of the carotid artery three-dimensional image building device, the carotid artery three-dimensional images used for auxiliary diagnosis can be accurately built.

Circuits and methods for recovering a periodic signal from a data signal. One circuit generally includes (1) a recovery circuit configured to produce a reference signal from the data signal, (2) a frequency detector circuit configured to produce a detector output in response to the reference signal and a recovered periodic signal, (3) a decision circuit configured to produce a decision output in response to the detector output and the recovered periodic signal (or a periodic derivative of that signal), and (4) a charge pump configured to produce a pump output, where the level of the pump output corresponds to a value of the decision output. The circuits and methods generally include those that embody one or more of the inventive concepts disclosed herein. The present invention advantageously provides smooth signal acquisition without use of an external clock.

The invention discloses a handheld scanning device. The handheld scanning device comprises an auxiliary handheld scanning device, an ultrasonic probe and a drive control device. The auxiliary handheld scanning device comprises an H-shaped hollow shell, a scanning transmission mechanism fixed to the hollow shell, and an ultrasonic probe support in transmission connection with the scanning transmission mechanism. The ultrasonic probe is fixed to the ultrasonic probe support. The drive control device comprises a drive motor, a motor control box and an external master controller. The external master controller carries out driving control on the drive motor through the motor control box. The drive motor drives the scanning transmission mechanism to drive the ultrasonic probe support to move in a linear mode so that the ultrasonic probe can continuously and stably collect two-dimensional carotid artery section images at different positions. The handheld scanning device can continuously, accurately and stably collect the two-dimensional ultrasonic images.

The invention discloses a movable emergency monitoring system which comprises a movable terminal and a hospital system terminal. The movable terminal is provided with a medical clinical facility, a collecting facility and a movable digital terminal. The system terminal comprises a server and a client terminal. The collecting facility mainly collects medical clinical information produced by the medical clinical facility and the information is connected with internet through mobile technology, and then the collected data of a patient is transferred to the server terminal and is transmitted to the client terminal. The mobile data terminal reads the existing data in the system terminal server through a wireless network. The mobile emergency monitoring system of the invention which has interactivity and real-time property can collect patient data at the mobile terminal in real time and can obtain the existing data of the patient at the hospital system terminal simultaneously in time, achieving dynamic monitoring the changeable state of the illness of the patient being salved, improving salving efficiency and winning time for salving.

The invention relates to an on-line acquisition method for plasticity coefficient of a rolled piece during rolling of a medium plate, and belongs to the technical field of rolling. The method comprises the following steps: (1) determining the inlet thickness of the rolled piece; (2) acquiring the actual outlet thickness of the rolled piece; (3) solving key points on a plastic curve; (4) fitting the plastic curve; (5) calculating the tangent slope at the actual pressing measurement point to obtain the plasticity coefficient; (6) applying the solved plasticity coefficient to an AGC control model on line; and (7) triggering next period, turning to step (1) and reacquiring the plasticity coefficient according to the acquired data. The method has the advantages that the method does not depend on the investment of process computers and is not influenced by complex factors in a production field; the result has no jump phenomenon; and the acquisition process is stable, can be directly embedded into basic automation to be applied, and continuously correct the plasticity coefficient along with the rolling process according to the change of a roll force and the change of a roll gap so as to improve the thickness compensation precision of an AGC system and apply to high-precision AGC control.

The invention discloses a multi-point statistical three-dimensional geological model automatic reconstruction method based on a local search strategy. The method is characterized by directly using a two-dimensional transverse and longitudinal geological section to reconstruct a three-dimensional geological model, and according to the spatial cross relation of a known section, dividing a three-dimensional modeling space into several subareas, wherein each subarea is surrounded by N (the N is greater than or equal to 1 and is less than or equal to 6) subsections; for a unknown attribute positiondistributed in each subarea, firstly, according to the position, acquiring the N surrounding subsections, and then, according to a set neighborhood parameter and a known data point, customizing dataevents at X, Y and Z directions, using the corresponding data event to scan the subsection at the corresponding direction, and acquiring N condition probability density function; and then, using a reasonable probability fusion strategy to acquire joint probability density distribution, and finally acquiring the attribute value of the position. The method can be popularized and applied in various kinds of three-dimensional geological information systems, geographic information systems and geologic modeling and simulation systems.

The invention discloses a testing fire and smoke grain high-speed sampling method and device, which is provided with a fuel gas interface on a drop burning platform connected with the fuel gas supplying pipeline. The fuel gas interface on the burning platform can be connected with nozzles of different models and an electricity heating zone is arranged at the surrounding zone around the fuel gas interface; or a liquid burning instrument is arranged on the burning platform, which achieves liquid burning fire of different scale through changing the side of a liquid burning container to conduct the corresponding burning study; at the surrounding zone of the heating zone, a ring-shaped filtering net is arranged to realize the stable controlling to burning; at one side of the heating zone or flame zone, a collecting piece is extended into the flame zone, and the collecting piece extends into the heating zone or the different heights or zones above the flame zone. By recording the position parameter of the collecting piece, the invention is beneficial for conducting regulated and repeatable burning experiment study.