CN112765730A - Design method of tire sidewall font graph - Google Patents

Design method of tire sidewall font graph Download PDF

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Publication number
CN112765730A
CN112765730A CN202110047397.XA CN202110047397A CN112765730A CN 112765730 A CN112765730 A CN 112765730A CN 202110047397 A CN202110047397 A CN 202110047397A CN 112765730 A CN112765730 A CN 112765730A
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character
block
characters
coordinate system
central
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CN112765730B (en
Inventor
张春生
侯丹丹
钱浩海
王昱壮
徐宁
李全胜
杨亚林
卢咪咪
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Zhongce Rubber Group Co Ltd
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Zhongce Rubber Group Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C99/00—Subject matter not provided for in other groups of this subclass
    • B60C99/006—Computer aided tyre design or simulation

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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  • Pure & Applied Mathematics (AREA)
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  • Evolutionary Computation (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Document Processing Apparatus (AREA)
  • Tyre Moulding (AREA)

Abstract

The invention relates to a method for processing a font and a graph on a tire sidewall, in particular to a method for designing the font and the graph on the tire sidewall. The method comprises the following steps of inputting: text content (n total text); block center coordinates (with tire center as polar coordinate system pole, horizontal right ray from the pole as polar axis, block center as
Figure 100004_DEST_PATH_IMAGE002
（
Figure 100004_DEST_PATH_IMAGE004
，
Figure 100004_DEST_PATH_IMAGE006
) ); a character size L; the size of the character space C; and (3) outputting: set of polar positions for n words
Figure 100004_DEST_PATH_IMAGE008
=（（
Figure 100004_DEST_PATH_IMAGE010
，
Figure 100004_DEST_PATH_IMAGE012
）|i

Description

Design method of tire sidewall font graph
Technical Field
The invention relates to a method for processing a font and a graph on a tire sidewall, in particular to a method for designing the font and the graph on the tire sidewall.
Background
The tire side font graph comprises various information such as specification, pattern name, brand, load index, speed level and the like, and is related to the appearance and the brand image of the tire. With the increase of the market demand for heavy duty tires, the new product development task of heavy duty tires is increased. Developing a new product requires designing a corresponding font drawing, and if multiple products are developed simultaneously, the workload is very heavy and the efficiency is low. When the font logo is newly added or the original font is modified, manual completion is needed, errors are easy to make in the process, and the quality is difficult to control. And the workload is very large, and the modified parameters cannot form a new database.
Disclosure of Invention
In order to solve the technical problem, the invention carries out secondary development on the AutoCAD based on the related class library of the AutoCAD to realize the function of automatically generating the picture. The invention reduces manual operation, improves working efficiency, and reduces the probability of human error through automatic generation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for designing a font drawing of a tire sidewall comprises the following steps:
the method comprises the following steps: establishing a rectangular coordinate system by taking the central point of the character block as the origin of the rectangular coordinate system, taking the horizontal direction to the left as the positive direction of the X axis of the coordinate system and the vertical direction as the square of the Y axis;
step two: calculating the distance D between the central points of adjacent charactersi,i+1(i ∈ (1, 2, …, n-1)); the distance between the central points of the characters comprises three parts, namely half the size of the front character, the interval between the two characters and half the size of the rear character, so that
Figure BDA0002897837450000011
Figure BDA0002897837450000012
Step three: calculating the central points of n characters and the central point P of a character blockmSet of distances Di,m(i ∈ (1, 2, …, n)); the distance between two adjacent words is twice the distance between the central points of adjacent words, so Di,m＝|i-m|*Di,m＝|i-m|*(C+L)；
Step four: calculating a rectangular coordinate set P of the center points of the n charactersxy(ii) a The central point of the character block is taken as the origin of a rectangular coordinate system, so that the central point coordinates of the character block are (0,0), the central point of the character is only expanded in the direction of an x axis, the y coordinates of all the central points of the character are 0, and the x coordinates are discussed in two cases;
in case one, if the number n of characters is odd, the central point of the character block is the first
Figure BDA0002897837450000013
A center point of each character;
in case two, if the number n of characters is even, the center point of the block is the first
Figure BDA0002897837450000021
A center point of each character interval; for both casesIs provided with
Figure BDA0002897837450000022
Step five: calculating polar coordinate set P of n character central pointsρθ(ii) a Converting rectangular coordinates of center points of n characters from PxyConversion to Pρθ(ii) a Firstly, moving the origin of a rectangular coordinate system to the center point of a tire, and obtaining a coordinate set P of a new rectangular coordinate system through the transformation of the rectangular coordinate systemx′yv＝((xi+ρmcosθm,yi+ρmsinθm)|(xi,yi)∈Pxy) (ii) a The new rectangular coordinate system coordinates are converted into polar coordinates,
Figure BDA0002897837450000023
will Pxy，Px′y′，PρθIs simultaneously substituted to obtain
Figure BDA0002897837450000024
Step six: calculating polar coordinate set P of n character central points after being bent into circular arcρθ(ii) a For the block, after the block is arranged, the block is bent into an arc to form a block center point PmThe angle theta of all characters is unchanged as the central point, and the arc length rho is all adjusted to be the central point P of the central point character blockmUniform arc length pm。
Due to the adoption of the technical scheme, the invention realizes the automatic generation function of the picture by carrying out secondary development on the AutoCAD based on the related class library of the AutoCAD. The invention reduces manual operation, improves working efficiency, and reduces the probability of human error through automatic generation.
Detailed Description
The following is a detailed description of specific embodiments of the invention.
The invention inputs: text content (n total text); block center point coordinates (with tire center point as polar coordinate system pole, horizontal right ray from the pole as polar axis, block center point is marked as Pm(ρm，θm) ); a character size L; the size of the character space C;
and (3) outputting: set of polar positions P of n wordsρθ＝((ρi，θi)|i∈(1，2，…,n))。
A method for designing a font drawing of a tire sidewall comprises the following steps:
the method comprises the following steps: establishing a rectangular coordinate system by taking the central point of the character block as the origin of the rectangular coordinate system, taking the horizontal direction to the left as the positive direction of the X axis of the coordinate system and the vertical direction as the square of the Y axis;
step two: calculating the distance D between the central points of adjacent charactersi，i+1(i ∈ (1, 2, …, n-1)); the distance between the central points of the characters comprises three parts, namely half the size of the front character, the interval between the two characters and half the size of the rear character, so that
Figure BDA0002897837450000031
Figure BDA0002897837450000032
Step three: calculating the central points of n characters and the central point P of a character blockmSet of distances Di，m(i ∈ (1, 2,..., n)); the distance between two adjacent words is twice the distance between the central points of adjacent words, so Di，m＝|i-m|*Di，m＝|i-m|*(C+L)；
Step four: calculating a rectangular coordinate set P of the center points of the n charactersxy(ii) a The central point of the character block is taken as the origin of a rectangular coordinate system, so that the central point coordinates of the character block are (0,0), the central point of the character is only expanded in the direction of an x axis, the y coordinates of all the central points of the character are 0, and the x coordinates are discussed in two cases;
in case one, if the number n of characters is odd, the central point of the character block is the first
Figure BDA0002897837450000033
A center point of each character;
in case two, if the number n of characters is even, the center point of the block is the first
Figure BDA0002897837450000034
A center point of each character interval; for both cases, there are
Figure BDA0002897837450000035
Step five: calculating polar coordinate set P of n character central pointsρθ(ii) a Converting rectangular coordinates of center points of n characters from PxyConversion to Pρθ(ii) a Firstly, moving the origin of a rectangular coordinate system to the center point of a tire, and obtaining a coordinate set P of a new rectangular coordinate system through the transformation of the rectangular coordinate systemx′y′＝((xi+ρmcosθm，yi+ρmsinθm)|(xi，yi)∈Pxy) (ii) a The new rectangular coordinate system coordinates are converted into polar coordinates,
Figure BDA0002897837450000036
will Pxy，Px′y′，PρθIs simultaneously substituted to obtain
Figure BDA0002897837450000037
Step six: calculating polar coordinate set P of n character central points after being bent into circular arcρθ(ii) a For the block, after the block is arranged, the block is bent into an arc to form a block center point PmThe angle theta of all characters is unchanged as the central point, and the arc length rho is all adjusted to be the central point P of the central point character blockmUniform arc length pm。
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (1)

1. A method for designing a font drawing on a tire sidewall is characterized by comprising the following steps:
the method comprises the following steps: establishing a rectangular coordinate system by taking the central point of the character block as the origin of the rectangular coordinate system, taking the horizontal direction to the left as the positive direction of the X axis of the coordinate system and the vertical direction as the square of the Y axis;
step two: calculating the distance between the central points of adjacent characters
Figure DEST_PATH_IMAGE002
（i
Figure DEST_PATH_IMAGE004
(1, 2, …, n-1)); the distance between the central points of the characters comprises three parts, namely half the size of the front character, the interval between the two characters and half the size of the rear character, so that
Figure DEST_PATH_IMAGE006
；
Step three: calculating the center points of n characters and the center points of character blocks
Figure DEST_PATH_IMAGE008
Set of distances of
Figure DEST_PATH_IMAGE010
(ii) a The distance between every two adjacent words is twice the distance between the central points of adjacent words, so
Figure DEST_PATH_IMAGE012
；
Step four: calculating rectangular coordinate set of n character central points
Figure DEST_PATH_IMAGE014
(ii) a The central point of the character block is taken as the origin of a rectangular coordinate system, so that the central point coordinates of the character block are (0,0), the central point of the character is only expanded in the direction of an x axis, the y coordinates of all the central points of the character are 0, and the x coordinates are discussed in two cases;
in case one, if the number n of characters is odd, the central point of the character block is the first
Figure DEST_PATH_IMAGE016
A center point of each character;
in case two, if the number n of characters is even, the center point of the block is the first
Figure DEST_PATH_IMAGE018
A center point of each character interval; for both cases, there are
Figure DEST_PATH_IMAGE020
；
Step five: calculating polar coordinate set of n character central points
Figure DEST_PATH_IMAGE022
(ii) a Converting rectangular coordinates of the center points of the n characters to obtain
Figure 303753DEST_PATH_IMAGE014
Is converted into
Figure 424156DEST_PATH_IMAGE022
(ii) a Firstly, moving the origin of a rectangular coordinate system to the center point of a tire, and obtaining a coordinate set of a new rectangular coordinate system through the transformation of the rectangular coordinate system
Figure DEST_PATH_IMAGE024
(ii) a The new rectangular coordinate system coordinates are converted into polar coordinates,
Figure DEST_PATH_IMAGE026
；
will be provided with
Figure DEST_PATH_IMAGE028
Is simultaneously substituted to obtain
Figure DEST_PATH_IMAGE030
Step six: calculating polar coordinate set of n character central points after being bent into circular arc
Figure 672735DEST_PATH_IMAGE022
(ii) a For the block, after the block is arranged, the block is bent into an arc to form a central point of the block
Figure 271206DEST_PATH_IMAGE008
Angle of all characters as central point
Figure DEST_PATH_IMAGE032
Constant, arc length
Figure DEST_PATH_IMAGE034
All adjusted to the center of the central block
Figure 180519DEST_PATH_IMAGE008
Same arc length
Figure DEST_PATH_IMAGE036
。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823856A (en) * 1984-12-19 1989-04-25 The Goodyear Tire & Rubber Company Serrated outline marking for a tire side wall
JPH06161422A (en) * 1992-11-17 1994-06-07 Casio Comput Co Ltd Rounded character generating device
CN105718671A (en) * 2016-01-22 2016-06-29 集美大学 CAD character position adjustment method for tire mold arc typesetting
CN111859490A (en) * 2020-07-02 2020-10-30 中策橡胶集团有限公司 Parameterization arrangement method for tire sidewall fonts
JP2023008359A (en) * 2021-07-06 2023-01-19 中央海産株式会社 Optical character recognition (ocr) method of information formed on tire sidewall part and optical character recognition device using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823856A (en) * 1984-12-19 1989-04-25 The Goodyear Tire & Rubber Company Serrated outline marking for a tire side wall
JPH06161422A (en) * 1992-11-17 1994-06-07 Casio Comput Co Ltd Rounded character generating device
CN105718671A (en) * 2016-01-22 2016-06-29 集美大学 CAD character position adjustment method for tire mold arc typesetting
CN111859490A (en) * 2020-07-02 2020-10-30 中策橡胶集团有限公司 Parameterization arrangement method for tire sidewall fonts
JP2023008359A (en) * 2021-07-06 2023-01-19 中央海産株式会社 Optical character recognition (ocr) method of information formed on tire sidewall part and optical character recognition device using the same

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