A variable drawing scale drawing car that supports hand-drawing and svg file import
A technology that supports hands and carts. It is used in manipulators, image data processing, and 2D image generation. It can solve the problems of cumbersomeness, inability to draw large-size graphics, and expensive large-scale plotters. Secondary development, the effect of meeting the drawing needs
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Embodiment 1
[0062] In this embodiment, a composition structure and workflow of a drawing car supporting a custom drawing scale imported by hand-drawing and SVG files of the present invention are provided, such as figure 1 shown.
[0063] from figure 1 It can be seen that the drawing car in this embodiment includes two parts, the client and the car, both rely on their respective wireless transmission modules for communication, and the medium can be WiFi; from figure 1 It can also be seen that the car end includes a main control module, a wireless transmission module, a motion control module, a pen raising and lowering module, a power module and a buzzer reminder device; the functions of the client mainly include curve fitting, SVG interpreter and drawing-related operations ;
[0064] Among them, the main control module is the control core of the car, and its main function is to send control signals to the motion control module, the pen-up and down module and the buzzer reminder device to...
Embodiment 2
[0079] This embodiment mainly describes each module of the trolley end in the present invention and its working principle.
[0080] The hardware layout (overlooking) of each part of the car is as follows: figure 2 As shown, the square is the body of the acrylic board, and the other parts are fixed on the body by screws. The dotted line part represents the bottom of the body, and the solid line part represents the top of the body. There is a hole in the middle of the body, the pen can move up and down vertically, and the steering gear controls the pen's lifting through the connection structure. Stepper motors are connected to omnidirectional wheels, and there are four groups in total, distributed at the four corners of the vehicle body. The main control module, motor driver board and buzzer etc. are fixed on the vehicle body, and the TV module is fixed under the vehicle body. The motion control module, pen lift and pen down module, buzzer reminder device and battery module o...
Embodiment 3
[0091] This embodiment mainly describes various functions and working principles of the client in the present invention.
[0092] The client can be an Android APP. The client mainly has functions such as drawing board setting, curve fitting, SVG interpreter and setting drawing scale. Artboard settings include new and saved artboards, brush width setting, clearing and undoing, anchor point size setting and drawing, etc. Curve fitting, the SVG interpreter, and setting the drawing scale are detailed below.
[0093] 1. Curve fitting
[0094] For graphics input by hand, it is necessary to decompose the curve into several short line segments. Such as Image 6 As shown, the dotted line is the recording point left by the finger touching the screen, the solid line is the polyline after fitting according to the scatter points, and the car actually draws the polyline. The method of fitting a straight line is the method of least squares. The points marked with English letters on the...
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