17results about How to "Drawn precisely" patented technology

The invention belongs to the technical field of underwater topographic survey, and particularly relates to an underwater topographic survey device with a diving camera, which comprises a base, a supporting arm is fixedly connected to the upper end surface of the base, a rotating roller is rotatably arranged on the right side of the supporting arm, and a supporting roller is rotatably arranged on the left side of the supporting arm. A rope is wound on the rotating roller, and a surrounding scraping mechanism for preventing aquatic plants from shielding the diving camera main body is also arranged on the shell. The surrounding scraping mechanism is utilized, when a worker finds that a picture shot by the diving camera body is covered by aquatic plants, the two scraping rings can be driven to descend at the same time, the aquatic plants attached to the surface of the diving camera body are scraped off through the scraping rings, and the aquatic plants are made to be away from the diving camera body; therefore, the situation that normal shooting of the diving camera main body is affected due to the fact that aquatic plants are wound or hung on the surface of the diving camera main body is avoided.

The invention provides an underground garage electronic map drawing method and device based on the Internet of Vehicles, and relates to the technical field of the Internet of Vehicles. The method comprises the following steps: detecting the position of a vehicle in response to receiving an underground garage drawing task sent by map maintenance equipment; after it is detected that the vehicle enters the underground garage, first certification information is sent to map maintenance equipment, so that after the map maintenance equipment verifies the first certification information, a data collection instruction is sent to the vehicle-mounted terminal; in response to the received data acquisition instruction, collecting and storing monitoring data obtained by monitoring the vehicle by a steering sensor, a speed sensor and a gyroscope; and after it is detected that the vehicle leaves the underground garage, second proof information and the monitoring data are sent to the map maintenance equipment, so that after the map maintenance equipment verifies the second proof information, an electronic map of the underground garage is drawn according to the monitoring data. In this way, the electronic map of the underground garage can be accurately drawn.

The invention belongs to the technical field of electronics, and provides a graphical method for solving a critical working point and an output range of an amplifying circuit. The method comprises the following steps: firstly, dividing three parameters of a working point into connotation and extension, designing connotation and extension of the working point, designing a concept of an alternating-current load line angular template, designing a key point that the angular template is suitable for passing through an intersection point of a direct-current load line and a current coordinate axis, and designing an intercept concept of the angular template on a voltage coordinate axis and an intercept calculation method; the angle template translates rightwards to line segments on two sides of an intersection point of the angle template and the direct current load line or a position when two projections on a coordinate axis are equal in length is a judgment rule of a critical working point; when the alternating-current load line angular template translates rightwards to a critical position, the collector-emitter critical bias voltage is equal to or converted to be equal to the output range of the amplification circuit, and during implementation, the scheme that the voltage serves as the abscissa axis and the current serves as the ordinate axis or the scheme that the current serves as the abscissa axis and the voltage serves as the ordinate axis can be adopted. The method is suitable for all three-configuration BJT or FET amplification circuits.

The utility model discloses a land planning area measuring device which comprises a base, armrest frames are installed on two sides of one end above the base, inclined supporting frames are installed on two sides of the other end of the base, the inclined supporting frames are fixedly connected with the armrest frames, and the land planning area measuring device further comprises a storage battery box installed on one side of the center of the upper surface of the base; the front wheels are arranged on two sides of the front end below the base; the distance measuring mechanism is arranged above the base; and the rotation angle measuring mechanism is arranged at the rear end of the base. According to the utility model, the distance measuring mechanism is utilized to measure the moving distance of the device through the data of the rotation angle, the rotation speed ratio and the perimeter of the rear wheel, and the rotation angle measuring mechanism is utilized to amplify and measure the rotation angle of the device so as to measure the topographic contour and record the data, so that the topographic area can be conveniently calculated; and the use of workers is effectively facilitated, and the working efficiency is improved.

The present invention discloses a ruler drawing method, device, equipment and storage medium for an ultrasonic panoramic image, the method comprising: obtaining coordinate position information of an ultrasonic panoramic image; extracting outer edge information of the ultrasonic panoramic image, and determining outer edge data of the ultrasonic panoramic image according to the outer edge information; and drawing a ruler for the ultrasonic panoramic image according to the outer edge data and coordinate position information. Compared with the prior art which only performs image registration and splicing but does not involve ruler processing of the ultrasonic panoramic image, the present invention draws a ruler for the ultrasonic panoramic image according to the outer edge data and coordinate position information of the ultrasonic panoramic image, thereby accurately drawing the ruler of the ultrasonic panoramic image, and enabling the user to clearly view the length of the lesion area.

The invention discloses a lightning sound source positioning and lightning channel reconstruction method based on a three-dimensional sound sensor array, and the method comprises the steps: designing and manufacturing a six-element sound sensor array and a data processing system, and carrying out the reconstruction of a three-dimensional structure of a lightning channel in cooperation with a picture of a high-speed camera; in the data processing system, sound source points are determined according to the data of the array, the fitting condition is judged according to the picture of the high-speed camera, and then the three-dimensional structure of the lightning channel is drawn according to each point; the method has the advantages that errors caused by the ToA method, the equipment sampling rate and the like can be reduced, the specific position where thunder and lightning are formed can be located more accurately, and a more accurate three-dimensional lightning channel structure can be described. According to the invention, the TGFs, the cloud layer electrification mechanism and the lightning formation reason can be better researched, and the design and research of the lightning protection system can be facilitated.

The utility model discloses a multifunctional ruler, which relates to the technical field of school supplies, and comprises a ruler body, the ruler body is provided with a plurality of pattern grooves, the ruler body is also provided with two coordinate line grooves, the two coordinate line grooves are arranged in a vertically crossed manner, and the coordinate line grooves are provided with a plurality of coordinate point positions. By means of the graph groove and the coordinate line groove in the ruler, students can draw various graphs and coordinate lines more accurately, drawing errors can be reduced, normalization and accuracy of the graphs are improved, and reliable basis is provided for follow-up mathematics learning and analysis.

A distributed battery pack monitoring method, device, and storage medium include: a battery monitoring sensor group uploading multi-frequency internal resistance, voltage, and temperature data to a main control unit via a daisy-chain communication unit; the main control unit sending real-time battery parameters to an LCD display for direct display; the main control unit processing and plotting the multi-frequency internal resistance using intelligent algorithms to obtain the battery's internal resistance spectrum; the main control unit sending the internal resistance spectrum to a battery capacity assessment host or battery monitoring software platform to estimate capacity and provide real-time temperature feedback; a storage unit storing the monitoring data; and a switch output unit outputting fault status to peripheral devices. This invention comprehensively monitors the real-time operating status of the battery by collecting multiple key parameters. The daisy-chain communication structure enables efficient aggregation and uploading of multi-point data. The intelligent algorithm analyzes and processes the internal resistance data to accurately plot the battery's internal resistance spectrum.

The invention discloses a railway line diagram generation method and device, equipment and a medium. The method comprises the steps that to-be-displayed railway line information on a screen is obtained, the railway line information comprises at least one to-be-drawn line and station information of each to-be-drawn line, and the station information comprises the station distance and the azimuth angle of each station; screening out an initial line from the lines to be drawn; according to the station information of the initial line and the size of the screen, station coordinates of all stations in the initial line are sequentially determined in the initial line; for at least one remaining line except the initial line, station coordinates of all stations in all the remaining lines are determined according to station coordinates of the same stations existing between the target line and the remaining lines, and the target line is the line where the station coordinates of all the stations are determined; and according to the station coordinates of the stations in the to-be-drawn lines, displaying the to-be-drawn lines on a screen. According to the embodiment of the invention, the efficiency and accuracy of drawing the railway line diagram can be improved.

The invention mainly relates to the technical field of Qt platform graph drawing. The invention provides a method for drawing a rounded rectangle at any angle on a Qt platform. The method comprises the following steps: automatically outputting the center of a circular arc, the length, the width and the left upper corner coordinates of a circumscribed rectangle in a circular arc circumscribed rectangle calculation process; the arc start-stop position calculation process is used for outputting the start position and the end position of the arc according to the circle center position and the fillet radius of the arc, the arc start angle calculation process is used for calculating the arc start angle according to the determined arc start position, and the start angle is the included angle between the arc start point and the horizontal direction; the Qt platform calls a DrawArc method to respectively draw four rounded corners of a rounded rectangle based on the calculated length and width of the external rectangle of the arc, the coordinates of the upper left corner, the starting point position, the ending point position and the starting angle of the arc, and then calls a LineTo method to connect the four drawn rounded corners to obtain the rounded rectangle; and the drawing efficiency and the application range of the rounded rectangle in the Qt platform can be effectively improved.

The invention relates to a Bode diagram signal processing method and device in the starting process of a nuclear turbine and a medium. The method comprises the following steps: acquiring a vibration signal and a key phase signal in a steam turbine starting process; determining a key phase starting moment according to the key phase signal, and calculating a rotating speed frequency based on the key phase starting moment; performing full-period interception processing and zero-phase band-pass filtering processing on the vibration signal in sequence, and determining the position of a local maximum point of the filtered vibration signal; calculating an absolute phase according to the key phase starting moment and the position of the local maximum point of the filtered vibration signal; fourier transform is carried out on the vibration signal after the whole-period interception processing so as to obtain a corresponding frequency domain signal and a frequency spectrum signal; calculating an index correction value according to the rotating speed frequency and the spectrum signal; performing amplitude correction on the frequency domain signal based on the index correction value to obtain a corrected amplitude; and drawing and displaying a corresponding Bode diagram according to the absolute phase and the corrected amplitude.

The drawing board assembly comprises a drawing board, a set square and a T-square, the T-square comprises a ruler head and a ruler body, the ruler body is transversely arranged on the front face of the drawing board, the ruler head is arranged at one end of the ruler body, a longitudinal sliding groove corresponding to the ruler head is formed in the drawing board in an inward concave mode, and the ruler head is arranged at the other end of the ruler body. The ruler head is arranged in the longitudinal sliding groove in a sliding mode, a transverse sliding groove is formed in the top of the ruler body in an inward concave mode, and the bottom of the set square is arranged in the transverse sliding groove in a transverse moving mode. By means of the mode, according to the convenient drawing board assembly for drawing, the ruler head can slide in the longitudinal sliding groove, the set square can slide in the transverse sliding groove, the horizontal line and the plumb line can be drawn rapidly, efficiently and accurately, portability is good, and safety is higher.

This utility model discloses a drawing board for engineering cost estimation, relating to the technical field of engineering cost estimation tools. It includes a first drawing board body, a rotating shaft rotatably connected to one side of the first drawing board body, and a second drawing board body fixedly connected to the other side of the rotating shaft. Assembly blocks are symmetrically fixedly connected to one side of the first drawing board body, and fixing components are installed inside the assembly blocks. L-shaped plates are symmetrically slidably connected to one side of both the first and second drawing board bodies, and clamping components are installed on one side of the L-shaped plates. Merging components are installed on both sides of the first drawing board body. This utility model, using the above structure, folds the originally large board surface into a compact form, easily placing it under a desk, in a closet gap, or in a corner of a vehicle, greatly freeing up office and living space. Moreover, the folded drawing board significantly reduces the difficulty of carrying it; whether going out to survey sites or going to construction sites to coordinate drawings, it can be easily packed into a backpack or handbag, meeting the frequent movement needs of engineering cost estimators.

The invention discloses an immune escape research method of a new coronavirus neutralizing antibody, and relates to the technical field of virology. Comprising the following steps: S1, constructing a random mutation library: introducing a degenerate basic group on a DNA sequence of a coded SARS-CoV-2 spike protein receptor binding domain by using a PCR-based technology, and generating a mutation library covering all possible amino acid replacement; and the comprehensiveness and diversity of random mutation are ensured through three rounds of mutation PCR circulation. By introducing a degenerate base NNS, all possible single amino acid mutation types of RBD are successfully covered, and comprehensiveness and diversity of random mutation are ensured; the method comprises the following steps: marking plasmids by using barcode sequence, and combining PacBio long sequencing and Illumina detection, so as to realize the accurate association of an RBD base sequence and a mutation sequence.

The invention discloses a method for accurately acquiring an unsaturated permeability coefficient of a soil-rock mixture, and relates to the technical field of material analysis. The method comprises the following steps: firstly, obtaining a soil-water characteristic curve of a soil-rock mixture in a full suction range through an experiment; then fitting a soil-water characteristic curve by using a VG model to accurately obtain fitting parameters; the saturated permeability coefficient of the soil-rock aggregate is obtained through a constant head permeability test, and finally, based on the fitting parameters and the saturated permeability coefficient, the accurate unsaturated permeability coefficient of the soil-rock aggregate is obtained through calculation by using a Gardner model. According to the method, the unsaturated permeability coefficient of the soil-rock aggregate is obtained through an indirect calculation method, the influence of various uncertain factors possibly existing in direct measurement through experiments is avoided, meanwhile, the accurate unsaturated permeability coefficient of the soil-rock aggregate can be obtained in the experiment times as few as possible, the cost is low, the time is short, and the method is suitable for large-scale popularization and application. The method is suitable for rapidly acquiring the unsaturated permeability coefficient of the soil-rock mixture on a large scale.

The utility model discloses a dot painting device convenient for diamond painting operation, which comprises a mounting base, a mounting cavity for placing a decorative painting board is arranged on the mounting base, a fixing mechanism is arranged on the mounting cavity, and the decorative painting board is fixed in the mounting cavity through the fixing mechanism; the transmission mechanism is mounted on the mounting base and is arranged in a space coordinate system so as to adapt to diamond dot drawings at different positions; and the dot painting device is mounted at the output end of the transmission mechanism and corresponds to the decorative painting board in position. According to the utility model, through the accurate transmission mechanism and the dot painting device, the function of rapidly and accurately drawing exquisite patterns is realized; through simple operation of the control panel, an operator can easily control the movement and operation process of the whole device, and the working efficiency and convenience are improved.