CN107204022B - Method for acquiring machining path according to machining curve - Google Patents
Method for acquiring machining path according to machining curve Download PDFInfo
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- CN107204022B CN107204022B CN201710399940.6A CN201710399940A CN107204022B CN 107204022 B CN107204022 B CN 107204022B CN 201710399940 A CN201710399940 A CN 201710399940A CN 107204022 B CN107204022 B CN 107204022B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
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Abstract
The invention provides a method for acquiring a processing path according to a processing curve, which comprises the following steps: firstly, obtaining a curve: acquiring a curve path to be processed from an incoming parameter in a function calling mode from a system; curve decoding: projecting a curve path to be processed into a plane coordinate system, and decoding the curve path into a coordinate point set of the plane coordinate system in sequence; ③ segmenting the curve: dividing the set of coordinate points into a plurality of coordinate subsets based on differences between adjacent coordinate points; fourthly, generating section by section: performing linear fitting on each coordinate subset to obtain a plurality of fitting curves; synthesizing the path. The invention provides sufficient premise for the technical realization of automatically generating the operation codes before the machining starts by a mode of obtaining the machining path by section-by-section processing, so that the technical realization of automatically generating the operation codes before the machining starts becomes possible.
Description
Technical Field
The invention relates to a method for acquiring a machining path according to a machining curve.
Background
For the design of the self-designed cinnabar artware, after the design is generally finished, the cinnabar artware can only be processed step by referring to a drawing by a special technician, and an operation code for automatic processing cannot be directly generated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for acquiring a processing path according to a processing curve, which acquires the processing path by processing segment by segment, provides sufficient premise for the technical realization of automatically generating an operation code before the processing starts, and enables the technical realization of automatically generating the operation code before the processing starts.
The invention is realized by the following technical scheme.
The invention provides a method for acquiring a processing path according to a processing curve, which comprises the following steps:
firstly, obtaining a curve: acquiring a curve path to be processed from an incoming parameter in a function calling mode from a system;
curve decoding: projecting a curve path to be processed into a plane coordinate system, and decoding the curve path into a coordinate point set of the plane coordinate system in sequence;
③ segmenting the curve: dividing the set of coordinate points into a plurality of coordinate subsets based on differences between adjacent coordinate points;
fourthly, generating section by section: performing linear fitting on each coordinate subset to obtain a plurality of fitting curves;
synthesizing path: and arranging the fitted curves into a processing curve path set in sequence, and returning data by taking the processing curve path set as a function.
The curve path to be processed obtained in the first step is an RGB pixel map;
in the second step, during decoding, for each unit pixel point, the coordinate of the center position of the image-taking pixel point is the coordinate of the unit pixel point.
The third step includes the following steps:
3.1: reading a difference value set value from the parameter table, and setting a first coordinate point as a current coordinate point;
3.2: calculating a coordinate difference value between the current coordinate point and the next coordinate point until no next coordinate point exists in the coordinate point set;
3.3: calculating the difference between each coordinate difference value and the next coordinate difference value, and if the calculated difference value is greater than a difference value set value, marking the current coordinate point corresponding to the coordinate difference value as a breakpoint;
3.4: taking the next coordinate point as the current coordinate point, returning to the step 3.2, and entering the next step if the next coordinate point does not exist in the coordinate point set;
3.5: and taking the first coordinate point as a starting point and the breakpoint as an ending point, adding all coordinate points between the starting point and the ending point into a first coordinate subset, then taking the next coordinate point of each breakpoint as the starting point, taking the breakpoint or the last coordinate point as the ending point, and respectively adding all coordinate points between the starting point and the ending point of each segment into the coordinate subset in sequence.
In the fourth step, linear fitting adopts a quadratic equation of one element as a linear model.
And packaging the first step to the fifth step into a C language function library.
In the second step, the first point in the order of the coordinate point set is the first point from the bottom to the top on the leftmost side.
The invention has the beneficial effects that: the mode of obtaining the processing path by section processing provides sufficient premise for the technical realization of automatically generating the operation codes before the processing starts, so that the technical realization of automatically generating the operation codes before the processing starts becomes possible.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
A method for obtaining a machining path according to a machining curve as shown in fig. 1 includes the following steps:
firstly, obtaining a curve: acquiring a curve path to be processed from an incoming parameter in a function calling mode from a system;
curve decoding: projecting a curve path to be processed into a plane coordinate system, and decoding the curve path into a coordinate point set of the plane coordinate system in sequence;
③ segmenting the curve: dividing the set of coordinate points into a plurality of coordinate subsets based on differences between adjacent coordinate points;
fourthly, generating section by section: performing linear fitting on each coordinate subset to obtain a plurality of fitting curves;
synthesizing path: and arranging the fitted curves into a processing curve path set in sequence, and returning data by taking the processing curve path set as a function.
The curve path to be processed obtained in the first step is an RGB pixel map;
in the second step, during decoding, for each unit pixel point, the coordinate of the center position of the image-taking pixel point is the coordinate of the unit pixel point.
The third step includes the following steps:
3.1: reading a difference value set value from the parameter table, and setting a first coordinate point as a current coordinate point;
3.2: calculating a coordinate difference value between the current coordinate point and the next coordinate point until no next coordinate point exists in the coordinate point set;
3.3: calculating the difference between each coordinate difference value and the next coordinate difference value, and if the calculated difference value is greater than a difference value set value, marking the current coordinate point corresponding to the coordinate difference value as a breakpoint;
3.4: taking the next coordinate point as the current coordinate point, returning to the step 3.2, and entering the next step if the next coordinate point does not exist in the coordinate point set;
3.5: and taking the first coordinate point as a starting point and the breakpoint as an ending point, adding all coordinate points between the starting point and the ending point into a first coordinate subset, then taking the next coordinate point of each breakpoint as the starting point, taking the breakpoint or the last coordinate point as the ending point, and respectively adding all coordinate points between the starting point and the ending point of each segment into the coordinate subset in sequence.
In the fourth step, linear fitting adopts a quadratic equation of one element as a linear model.
And packaging the first step to the fifth step into a C language function library.
In the second step, the first point in the order of the coordinate point set is the first point from the bottom to the top on the leftmost side.
In practice, even if the accuracy is higher in the previous image recognition process, only a graph is obtained, and a regular curve which is not operable by the processing equipment is obtained, so that in order to realize automatic code generation, the curve of the image must be firstly processed into a processing path, namely, a regular curve.
On the other hand, in order to ensure the original concept of the highly reduced artwork processing highly reduced designer, high-precision image acquisition is required during image recognition, but the computing capability of the processing equipment is limited, and the computing efficiency is seriously affected due to too many pixel points in the high-precision image, so that the high-precision graph needs to be converted into a processing path with lower computing requirement, namely a regular curve.
The steps adopted by the invention can well solve the problem of processing the curve of the image into a regular curve.
Claims (5)
1. A method of obtaining a machining path from a machining curve, comprising: the method comprises the following steps:
firstly, obtaining a curve: acquiring a curve path to be processed from an incoming parameter in a function calling mode from a system;
curve decoding: projecting a curve path to be processed into a plane coordinate system, and decoding the curve path into a coordinate point set of the plane coordinate system in sequence; during decoding, for each unit pixel point, the coordinate of the central position of the image-taking pixel point is the coordinate of the unit pixel point;
③ segmenting the curve: dividing the set of coordinate points into a plurality of coordinate subsets based on differences between adjacent coordinate points;
fourthly, generating section by section: performing linear fitting on each coordinate subset to obtain a plurality of fitting curves;
synthesizing path: arranging the fitted curves into a processing curve path set in sequence, and taking the processing curve path set as a function to return data;
the third step includes the following steps:
3.1: reading a difference value set value from the parameter table, and setting a first coordinate point as a current coordinate point;
3.2: calculating a coordinate difference value between the current coordinate point and the next coordinate point until no next coordinate point exists in the coordinate point set;
3.3: calculating the difference between each coordinate difference value and the next coordinate difference value, and if the calculated difference value is greater than a difference value set value, marking the current coordinate point corresponding to the coordinate difference value as a breakpoint;
3.4: taking the next coordinate point as the current coordinate point, returning to the step 3.2, and entering the next step if the next coordinate point does not exist in the coordinate point set;
3.5: and taking the first coordinate point as a starting point and the breakpoint as an ending point, adding all coordinate points between the starting point and the ending point into a first coordinate subset, then taking the next coordinate point of each breakpoint as the starting point, taking the breakpoint or the last coordinate point as the ending point, and respectively adding all coordinate points between the starting point and the ending point of each segment into the coordinate subset in sequence.
2. The method of claim 1 for obtaining a machining path from a machining curve, comprising: the curve path to be processed obtained in the step (i) is an RGB pixel map.
3. The method of claim 1 for obtaining a machining path from a machining curve, comprising: in the fourth step, linear fitting adopts a quadratic equation of one element as a linear model.
4. The method of claim 1 for obtaining a machining path from a machining curve, comprising: and packaging the first step to the fifth step into a C language function library.
5. The method of claim 1 for obtaining a machining path from a machining curve, comprising: in the second step, the first point in the order of the coordinate point set is the first point from the bottom to the top on the leftmost side.
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| CN106133628A (en) * | 2014-03-26 | 2016-11-16 | 三菱电机株式会社 | For determining the method and system in the path of the cutter of processing groove shapes |
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| US7881556B2 (en) * | 2007-10-10 | 2011-02-01 | Himax Technologies Limited | Method of image processing and device thereof |
| CN101957609B (en) * | 2010-08-11 | 2012-12-19 | 北京数码大方科技有限公司 | C-axis code generation method and device for multiple-section characteristic processing |
| CN104714477B (en) * | 2015-03-13 | 2017-06-20 | 江俊逢 | A kind of generation method of processed file planning system and processed file |
| CN105446269B (en) * | 2016-01-15 | 2018-11-02 | 广东工业大学 | Contour curve numerical control code generating method based on genetic algorithm and its numerically-controlled machine tool |
| CN106020120A (en) * | 2016-07-29 | 2016-10-12 | 芜湖哈特机器人产业技术研究院有限公司 | Method for generating G code by using image based on ios system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106133628A (en) * | 2014-03-26 | 2016-11-16 | 三菱电机株式会社 | For determining the method and system in the path of the cutter of processing groove shapes |
| CN105652800A (en) * | 2014-11-28 | 2016-06-08 | 发那科株式会社 | Tool path curve generation method and tool path curve generation apparatus |
Non-Patent Citations (1)
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| 应用Auto CAD实现数控加工曲线拟合的研究;张国栋 等;《全国第十四届计算机科学及其在仪器仪表中的应用学术交流会论文集》;20011201;64-67 * |
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