548 results about "Distance parameter" patented technology

A technique for managing the display of content on a display of an electronic device may be based on a distance of the user to the display. The distance may be estimated by analyzing video data to detect a face of the user and establish a distance parameter based on a relationship between facial features. Based on this information, the displayed content may be adjusted to facilitate easy viewing of the displayed content, such as by changing the size of the displayed content, the layout of the displayed content, or the number of visual elements that make up the displayed content.

The invention discloses a computer capable of adjusting a screen display element. The computer comprises a display screen, a distance measuring module, an adjustment processing module and a adjustment executing module, wherein the distance measuring module is used for acquiring first distance information related to the distance between a user and the display screen; the adjustment processing module is used for receiving and processing the first distance information to acquire a first distance parameter, acquiring a first screen display parameter corresponding to the first distance parameter according to the corresponding relationship between a preset distance parameter and the screen display parameter, and generating a first screen display parameter adjusting instruction at least when the first screen display parameter is different from the current screen display parameter; and the adjustment executing module is used for receiving the first screen display parameter adjusting instruction, and adjusting the display screen to be displayed according to the first screen display parameter. The invention also discloses a method for adjusting the screen display element, which automatically adjusts a resolution or a displayed font for a user to the resolution value or the font size which is suitable for the user to view or operate according to the distance between the user and display screen, and is convenient and easy.

The invention discloses an air-conditioner and a method and a device for controlling the air supply mode of the air-conditioner. The method for controlling the air supply mode of the air conditioner comprises the following steps that: the air-conditioner acquires the distance parameter between a tested person and the air-conditioner and the human body parameter of the tested person; the air-conditioner calculates the air deflecting angle of an air deflector according to the distance parameter and the human body parameter; and the air conditioner controls the air deflector to supply air according to the air deflecting angle. The method and the device can enable the air supply mode of the air conditioners to be more humanized.

The invention provides a vehicle line walking method and system based on machine vision. The line walking method comprises the following steps: an image acquisition module acquires an RGB color image of a road surface; an image processing module converts the RGB color image into a grayscale image; a binarization module obtains a binarization image to separate a lane line; an edge detection module obtains an edge image containing an inner edge and an outer edge of the lane line; a processor acquires parameters of the lane line to establish a lane line model, acquires lane position data of a vehicle in a world coordinate system through inversely perspective conversion, and determines a driving mode of the vehicle according to road surface image information; parameter adjustment of a steering engine and a motor can be realized by using acquired vehicle corner parameters and distance parameters, adopting the driving mode of the vehicle, and utilizing a sectional adaptive control strategy so as to realize real-time control of driving directions and driving speed of the vehicle. According to the method and system, provided by the invention, the line walking speed in the driving process of the vehicle can be increased, the line walking can be completed within the time of 10 milliseconds, and the stability in the driving process of the vehicle is strong.

The invention discloses a vehicle ranging method based on monocular vision, and belongs to the field of target detection and ranging. The method comprises the steps of installing a monocular camera on a vehicle, measuring the height and the pitching angle of the camera, and determining focal distance parameters of the camera; acquiring a video image in an expressway environment; performing preliminary de-noising and filtration on the video image by adopting Gaussian filtration; performing interest region segmentation preprocessing before detection of a target vehicle on the video image; performing vehicle detection in a segmented video image region, wherein an Haar feature for increasing a wheel feature and a tail feature is adopted in the target vehicle detection, so as to effectively improve the accuracy of target vehicle identification; and measuring the distance of the target vehicle, wherein a ranging method based on pin-hole imaging is adopted within a short-distance range, while a ranging method of data fitting is adopted within a long-distance range, so that the error rate is reduced, and a real-time ranging effect can be achieved. The method has the advantages of high detection speed, high accuracy, strong real-time property and low cost.

The invention discloses a multi-behavior combining auto-navigation method for a mobile robot in an unknown environment. The method is characterized in that the method comprises the following steps that (1) current azimuth angle is obtained in real time according to the relative positions of an object and the mobile robot, and a plurality of distance parameters are obtained in real time according to the status of obstacles around the mobile robot; (2) a multi-output support vector machine fuzzy controller outputs a corner value Theta i and a velocity value vi according to the obtained azimuth angle and distance parameters, wherein i is equal to 1, 2 or 3; (3) a multi-output support vector machine environmental-identification controller inputs signals and outputs weight parameters wi of three subbehaviors according to input signals of the azimuth angle and the distance parameters, wherein i is equal to 1, 2 or 3; and (4) current corner value Theta i and velocity value vi of the mobile robot used for navigation are calculated according to the formula. The multi-behavior combining auto-navigation method adopts intelligent control strategy, and has the advantages of strong self adaptation, high navigation reliability and excellent effect.

The invention discloses a method, equipment and a system for diagnosing a failure of a passive optical network (PON). The method comprises the steps of: pre-obtaining identification information of each ONU (Optical Network Unit) in the PON, optical fiber link physical distance and the corresponding peak information of the ONU when the PON is normal; establishing a correspondence table of the identification information and the corresponding peak information of each ONU according to the obtained identification information and the physical distance parameter information of each ONU and the optical fiber link physical distance and the corresponding peak information of the ONU; obtaining corresponding peak information of optical fiber links of all current ONUs in the PON according to the preset failure diagnosis measure; matching the corresponding peak information of the current optical fiber link with the pre-stored leak information, and if corresponding peak position and/or amplitude changes, obtaining the identification information of the ONU corresponding to the changed peak according to the correspondence table; and if not, executing the equipment failure diagnosis. By applying the invention, the failure position can be immediately found and positioned, the failure maintenance time is shortened and the failure detection efficiency is improved.

A man-machine collaboration shared control remote welding method relates to a remote welding method. The invention aims to solve the problems in the prior remote welding that the direct control operation can not be continuously carried out and particularly can not work under the situation of time delay, and an autonomous tracking weld seam can not be welded under the situations of complicated welding environment and irregular groove outline dimension of a weld seam. The remote welding method comprises the following steps: firstly, a macroscopic zooming camera acquires a two-dimensional video image, and the visual field of an operator is adjusted in a central monitoring man-machine interface; secondly, a robot guides a welding gun to reach the upper part of the weld seam; thirdly, the operator tracks the weld seam; fourthly, a workpiece is fixed on a working platform to form the welding environment at the remote end; fifthly, the robot moves towards an initial point of the weld seam; sixthly, the welding gun ensures that arc-length distance parameters of the workpiece are set by the central monitoring man-machine interface; and seventhly, the operator sets a shared control algorithm through the central monitoring man-machine interface.

The invention discloses a monocular video based real-time posture estimation and distance measurement method for a three-dimensional rigid body object, comprising the following steps: collecting the observation video of the object through an optical observation device; feeding the image sequence obtained from collection into an object segmentation module to obtain an two-value segmentation image and an contour image of the object; extracting the characteristic vectors of contour points of the target to generate a multiple-characteristic drive distance image; establishing the tentative homonymic characteristic correspondence between an input two-dimensional image sequence and the objective three-dimensional model; inverting the three-dimensional posture and distance parameters of the object in the image; feeding back the three-dimensional posture and distance parameters of the object obtained from inversion; and correcting and updating the tentative homonymic characteristic correspondence between the two-dimensional image sequence and the objective three-dimensional model until the correspondence meets the iteration stop condition. The method does not need three-dimensional imaging devices, and has the advantages of no damage to observed objects, good concealment, low cost and high degree of automation.

The invention relates to an industrial robot positioning precision calibration method used for improving robot absolute positioning precision. The method comprises the steps that: a robot kinetics model is established; a rotary joint equation is established by using a circumferential method; joint torsion angle parameter values are calculated; the actual pose of a robot end is measured accurately by utilizing a laser tracker; D-H algorithm inversion kinetics equation is improved to obtain geometrical structural parameters; calibration of joint distance parameter values and calibration of joint offset are realized, and thereby first calibration is completed. Error correction is carried out on D-H parameters based on first calibration results, and if positioning precision can not meet requirements, second calibration can be carried out by substituting parameter correction values, instead of theoretical parameter values, into the kinetics equation. Absolute positioning precision of the robot is improved with the calibration method, which is proved in experiments. According to the invention, the calibration method is advantaged in that the method is simple and practical and introduces small external errors.

The invention provides a coiling method of a hot continuous rolled medium plate with high strength which is applied to the production of the hot continuous rolled medium plate that has the characteristics of hard material, thick specification, high strength, etc. The invention aims at eliminating unstable factors of the medium plate during the rolling and lowering surface defects of the plate. The coiling method carries out the arrangement and the regulation of parameter control according to a hot continuous rolled coiling machine group, comprising setting the speed of a G roller, selecting proper leading rate and lag rate of the roller, selecting pressure coefficients, regulating laterally guided pressure coefficients and calibrating pressure coefficients of pinch rolls; controlling currents and negative currents of up and lower pinch rolls and setting the clearance between wrapper rolls and opening distance parameters; ensuring the tension added value of a drum and the current ratio.

The present invention is directed to a solution for measuring geometric parameters in the eye which are required for calculating the refractive power of intraocular lenses. The device according to the invention for axial length measurement which acquires axial length, anterior corneal radii, anterior chamber depth, and other parameters in the anterior eye segment includes a control unit, a first measuring device for determining axial length, and an additional measuring device which acquires a plurality of structures in the anterior segment (such as the cornea, anterior chamber, and lens) and which has at least one illumination unit and at least one image recording unit. By determining additional partial-distance parameters of the anterior eye segments, the IOL can be calculated with high precision even after refractive surgery in which the natural relationship between the radii of the anterior and posterior corneal surfaces is extensively altered by corneal surgery.

The invention discloses a laser radar two-step calibration method based on a calibration field. The method comprises steps of establishing a calibration field; carrying out calibration; preparing angle calibration; networking a theodolite; scanning a laser radar; measuring the theodolite; establishing an angle correction equation; calculating an angle correction coefficient; establishing a base line field; measuring the laser radar; measuring the theodolite; establishing a distance correction equation; and calculating a distance correction coefficient. According to the invention, rapid calibration of the laser radar is achieved without taking a precisely designed and processed calibration device as a calibration standard; a problem of too high requirements on a test place, the calibration field and the calibration device in the normal method is solved; through cooperation of a rotation bench, the whole test process is achieved, the test difficulty level is reduced and a difficulty in ensuring precision of full field-of-view angle correction in the normal method is solved; and through the test of the calibration field and the base line field step by step, effects of correcting separation distances in a calibration model are achieved and disadvantages in mutual coupling of distance parameters and angle parameters in the normal method are overcome.

The invention provides a method for designing a loop-optimization-based emission beam matrix in a FDA-MIMO radar. The method is characterized in that the feature that when a small frequency increment is added to a frequency control matrix through adjacent matrix elements, emission beams with angles and distance dependence can be produced, and possibility is provided for the angle and distance parameter combined positioning of a target is utilized to combine with the frequency control matrix and an MIMO radar, and combined estimation of the distances and angles of multiple targets is achieved by optimally designing the emission beam matrix. The method specifically includes: determining emission carrier waves, the frequency increment and emission receiving antenna number according to actual needs and the features of a frequency control matrix MIMO radar system, and building a frequency control matrix MIMO radar system model; using a loop optimization method to design the emission beam matrix of the radar; verifying the performance of estimated distances, angles and amplitudes on the basis of the emission beam matrix. The method is essentially a method minimizing the mutual coherence principle of a perception matrix in a thinning model to increase distance and angle-dimension resolution.

An SAR deception jamming method with jammers and receivers jointly networked includes the following steps that the multiple jammers and the multiple receivers are arranged for networking, radar signals are intercepted through the jammers and the receivers, and SAR signal parameters are analyzed; through the intercepted radar time domain signals, the instant slope distance difference from all the receivers to the jammers is calculated; the instant position distance parameters corresponding to all the receivers are calculated; a coefficient matrix is constructed, and the inverse of the coefficient matrix is calculated; according to the coefficient matrix and the instant position distance parameters, modulation parameters are calculated; the instant slope distance difference of points in jamming scenes relative to the jammers is calculated; jamming modulation is performed on the signals intercepted by the jammers to generate jamming signals; the deception jamming signals are forwarded, and an opposite-side radar obtains deception jamming signals with real-scene radar signals and the false-scene deception jamming signals overlapped. The method avoids influences of approximate errors on SAR deception jamming effect, vivid jamming images can be obtained, good jamming effect is achieved, and the method has the advantages of being simple, efficient and accurate.

The invention relates to a laser range finder and a working method thereof. According to the invention, a laser light source that is capable of moving along a circular trace is utilized and pictures are taken regularly to record a trace of a reflection spot; on the basis of the trace of the spot and combination of a structure of an optical system, a to-be-measured distance parameter is obtained by image processing and calculation. Beneficial effects of the invention are as follows: an optical path system is constructed by employing a principle of optics, thereby obtaining a high quality imageand improving a resolution of the system; meanwhile, an image processing method is utilized for cooperation, so that interferences of external factors like temperature and noise on a measuring process can be effectively eliminated as well as rapid, reliable, convenient and accurate measurement on a distance can be realized.

The invention relates to an automatic motorcycle type identification system and method based on high-speed pulse laser scanning, belonging to the technical field of intelligent traffic management devices and methods. The automatic motorcycle type identification system comprises a high-frequency laser ranging module, a motorcycle outline drawing module and a motorcycle type identification module, the high-frequency laser ranging module and the motorcycle outline drawing module are vertically arranged above a lane. By using the method provided by the invention, the high-frequency laser ranging module is used for carrying out real-time pulse laser ranging and sending a distance value to the motorcycle outline drawing module, the motorcycle outline drawing module is used for drawing a distance parameter scanning graph in real time and sending the distance parameter scanning graph to the motorcycle type identification module, and the motorcycle type identification module is used for identifying a motorcycle type according to motorcycle outline information on the distance parameter scanning graph. Therefore, the invention effectively overcomes the defect of the prior art, and provides the automatic motorcycle type identification system and method with the advantages of simpleness in setting and maintaining, low cost, higher motorcycle identification rate and wide application range.

A binaural object-oriented audio decoder comprising decoding means for decoding and rendering at least one audio object based on head-related transfer function parameters is proposed. Said decoding means are being arranged for positioning an audio object in a virtual three-dimensional space. Said head-related transfer function parameters are being based on an elevation parameter, an azimuth parameter, and a distance parameter. Said parameters are corresponding to the position of the audio object in the virtual three-dimensional space. The binaural object-oriented audio decoder is configured for receiving the head-related transfer function parameters, whereby said received head-related transfer function parameters are varying for the elevation parameter and the azimuth parameter only. Said binaural object-oriented audio decoder is characterized by distance processing means for modifying the received head-related transfer function parameters according to a received desired distance parameter. Said modified head-related transfer function parameters are being used to position the audio object in the three-dimensions at the desired distance. Said modification of the head-related transfer function parameters is based on a predetermined distance parameter for said received head-related function parameters.

The invention provides a saw-tooth wave distance measuring and speed measuring method based on a 77GHz millimeter wave radar. The saw-tooth wave distance measuring and speed measuring method comprisesthe following steps: a. transmitting same frequency modulation continuous saw-tooth wave transmitting signals by Nt transmitting antennas in sequence and forming a virtual array; b. receiving echo signals of the transmitting signals by Nt receiving antennas and forming a virtual array YV which belongs to CNtNr*Ns*Nsa1, wherein Ns is equal to fsT and Nsa1 is a transmitting period; c. carrying outwindowing FFT (Fast Fourier Transform) on each transmitting period and a receiving signal of each antenna to obtain YVF which belongs to CNtNr*NqFFT*Nsa1, wherein NqFFT is a rapid time dimension FFT point number; d. carrying out slow time dimension FFT on receiving signals of different distance units of each receiving antenna to obtain YVFF which belongs to CNtNr*NqFFT*NsFFT, wherein NsFFT is a slow time dimension FFT point number; e. carrying out phase compensation on each distance-speed unit of the YVFF to obtain YVFFC which belongs to CNtNr*NqFFT*NsFFT; f. carrying out beam forming on all the distance-speed units to obtain Z which belongs to CNqFFT*NsFFT; g. carrying out constant false alarm CFAR detection on data obtained by the beam forming to obtain a constant false alarm detection result; h. substituting the constant false alarm detection result into an equation to obtain a speed v and a distance parameter r.

The invention discloses a method for supplementing light and an image collecting device for solving the following technical problem: an image collecting device in the prior art cannot adjust an intensity of light supplementing, with respect to different photographed objects, such that there is a poor effect of supplementing light for the photographed object. The method for supplementing light is applied to the image collecting device which is connected to a light supplementing device. The method includes obtaining a first distance parameter between the photographed object in a first area and the image collecting device when the image collecting device collects a first image of the first area; determining a first driving current value in accordance with the first distance parameter based on a correspondence between the distance parameter and the driving current value of the light supplementing device; and driving the light supplementing device by the first driving current to supplement light to the photographed object.

The invention discloses a mobile terminal, which comprises a memory, a processor and a screen display adjusting method which is stored on the memory and can be operated on the processor, and comprisesthe following steps of: obtaining first distance information between a user and a screen of the mobile terminal; judging whether a distance parameter of the first distance information is smaller thana preset first safety distance threshold value or not; if the distance parameter of the first distance information is smaller than the first safe distance threshold value, judging whether the distance parameter of the first distance information is smaller than a preset second safe distance threshold value or not; if the distance parameter of the first distance information is smaller than a secondsafety distance threshold value, the screen displays first distance reminding information; the human-computer interaction is enhanced, the user experience is improved, the bad reading habit of the user can be improved, and the health of the user is benefited.

The invention discloses a data collection synchronous method of an electrical railway distance measurement device, which is characterized in that: synchronous data collection is realized through special optical fibers, a distance measurement device of a traction substation is adopted as a main machine, a distance measurement device of AT transformer station and a sectioning station is adopted as an auxiliary machine, and all distance measurement devices are connected with one another through one optical fiber; the length of an optical fiber channel is estimated through the inputted parameter of a distance between every two AT transformer stations, data transmission delay between the devices of the AT transformer stations or between the devices of the AT transformer station and the sectioning station is further calculated according to the length of the optical fiber and the optical speed, a sampling interruption interval time of the auxiliary machines is instantly adjusted according to the calculated fixed data transmission delay, the desynchronizing influence caused by errors such as clock crystal oscillation can be eliminated, and the sampling interruption between the main machine and the auxiliary machine as well as between the auxiliary machine and the auxiliary machine is maintained relatively synchronous.