CN112199795A - Joint bandage generation method and system - Google Patents

Joint bandage generation method and system Download PDF

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CN112199795A
CN112199795A CN202011101504.4A CN202011101504A CN112199795A CN 112199795 A CN112199795 A CN 112199795A CN 202011101504 A CN202011101504 A CN 202011101504A CN 112199795 A CN112199795 A CN 112199795A
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transverse
bandage
length
ratio
poisson
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CN112199795B (en
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韩亚峰
王昊天
卢继平
刘长猛
潘晨
王庭宇
赵海元
杨丁
苏鹏垒
曾心耘
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Beijing Institute of Technology BIT
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Abstract

The invention discloses a method and a system for generating a bandage at a joint. The method comprises the following steps: sequentially changing the length of the transverse gap of the first basic unit according to the structural parameters of the bandage with the gap, determining the Poisson ratio of the first basic unit under different strain conditions under each length of the transverse gap of the first basic unit, and obtaining a relation table of the length of the transverse gap and the Poisson ratio; calculating the Poisson's ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; determining the length of the transverse slot corresponding to the Poisson ratio of each second basic unit according to a relation table of the length of the transverse slot and the Poisson ratio; replacing each second base unit with a first base unit corresponding to the transverse slit length corresponding to the poisson's ratio of the second base unit, resulting in the resulting bandage structure. By adopting the method and the system, the bandage can keep high coverage rate with the joint part, and the bandage is prevented from falling off or the patient is prevented from generating tearing feeling.

Description

Joint bandage generation method and system
Technical Field
The invention relates to the technical field of modern medical treatment, in particular to a method and a system for generating a bandage at a joint.
Background
With the development of modern medical technology and human factors engineering, medical equipment pays more and more attention to the use experience of users. The bandage and similar products (such as band-aid) used in the medical institution at present adopt a structure without gaps, which can ensure that the bandage can achieve good function after the elbow is fixed, but the wound bandage can make the patient feel strong tearing feeling or the bandage fall off when the elbow or knee of the patient needs to move.
Disclosure of Invention
The invention aims to provide a method and a system for generating a bandage at a joint, which can ensure that the bandage can keep high coverage rate with the joint when the joint deforms, and avoid the bandage from falling off or the tearing of a patient.
In order to achieve the purpose, the invention provides the following scheme:
a method of bandage generation, comprising:
acquiring structural parameters of the bandage with the gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps;
sequentially changing the length of the transverse gap of the first basic unit according to the structural parameters of the bandage with the gap, determining the Poisson ratio of the first basic unit under different strain conditions under each length of the transverse gap of the first basic unit, and obtaining a relation table of the length of the transverse gap and the Poisson ratio;
acquiring the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no seam exists between every two adjacent second basic units;
calculating the Poisson's ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use;
determining the length of the transverse slot corresponding to the Poisson ratio of each second basic unit according to the relation table of the length of the transverse slot and the Poisson ratio;
replacing each of the second base units with a first base unit corresponding to a transverse slit length corresponding to the poisson's ratio of the second base unit, resulting in the resulting bandage structure.
Optionally, the sequentially changing the lengths of the transverse slits of the first base unit according to the structural parameters of the bandage with slits to determine the poisson's ratio of the first base unit under different strain conditions at each length of the transverse slit of the first base unit specifically includes:
acquiring the side length of the first basic unit;
selecting one transverse slit length in a transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length; a plurality of mutually unequal transverse gap lengths are arranged in the transverse gap length set;
for each strain situation, determining the ratio of the transverse variation to the side length as transverse strain, determining the ratio of the axial variation to the side length as axial strain, and determining the ratio of the axial strain to the transverse strain as a poisson ratio to obtain the poisson ratios of the first basic unit under different strain situations under the selected transverse gap length;
judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; if not, returning to the step of selecting one transverse slit length in the transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length.
Optionally, the calculating the poisson ratio of each second basic unit according to the structural parameter of the seamless bandage before use and the structural parameter of the seamless bandage after use specifically includes:
calculating the Poisson's ratio of the second elementary unit according to the following formula:
Figure BDA0002725513900000021
Figure BDA0002725513900000022
Figure BDA0002725513900000031
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure BDA0002725513900000032
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure BDA0002725513900000033
the transverse length of the second basic unit of the seamless bandage after use.
Optionally, after obtaining the table of the relationship between the length of the transverse slit and the poisson's ratio, the method further includes:
and storing the relation table of the length of the transverse gap and the Poisson ratio in a database.
The present invention also provides a bandage generation system comprising:
the structural parameter acquisition module of the bandage with the gap is used for acquiring the structural parameters of the bandage with the gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps;
a relation table generating module of the transverse gap length and the poisson ratio, configured to sequentially change the transverse gap length of the first base unit according to the structural parameter of the bandage with gap, determine the poisson ratio of the first base unit under different strain conditions for each transverse gap length of the first base unit, and obtain a relation table of the transverse gap length and the poisson ratio;
the structure parameter acquisition module of the seamless bandage is used for acquiring the structure parameters of the seamless bandage before use and the structure parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no seam exists between every two adjacent second basic units;
the poisson ratio calculation module of the second basic units is used for calculating the poisson ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use;
the transverse slit length determining module corresponding to the Poisson ratio of the second basic units is used for determining the transverse slit length corresponding to the Poisson ratio of each second basic unit according to the relation table of the transverse slit length and the Poisson ratio;
and the bandage generating module is used for replacing each second basic unit with a first basic unit corresponding to the transverse gap length corresponding to the Poisson ratio of the second basic unit to obtain a generated bandage structure.
Optionally, the module for generating a relationship table between the length of the transverse slit and the poisson ratio specifically includes:
a side length obtaining unit configured to obtain a side length of the first base unit;
the transverse variation and axial variation determining unit is used for selecting one transverse slit length in the transverse slit length set and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length; a plurality of mutually unequal transverse gap lengths are arranged in the transverse gap length set;
the strain and poisson ratio determining unit is used for determining the ratio of the transverse variation to the side length as transverse strain, determining the ratio of the axial variation to the side length as axial strain, and determining the ratio of the axial strain to the transverse strain as poisson ratio to obtain the poisson ratios of the first basic unit under different strain conditions under the selected transverse gap length;
the judging unit is used for judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; and if not, executing the transverse variation and axial variation determining unit.
Optionally, the poisson ratio calculating module of the second base unit specifically includes:
a poisson ratio calculating unit of the second basic unit, configured to calculate a poisson ratio of the second basic unit according to the following formula:
Figure BDA0002725513900000041
Figure BDA0002725513900000042
Figure BDA0002725513900000043
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure BDA0002725513900000044
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure BDA0002725513900000045
the transverse length of the second basic unit of the seamless bandage after use.
Optionally, the system further includes:
and the storage module is used for storing the relation table of the length of the transverse gap and the Poisson ratio in a database.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method and a system for generating a bandage at a joint, which are used for obtaining structural parameters of a bandage with a gap, sequentially changing the length of a transverse gap of a first basic unit according to the structural parameters of the bandage with the gap, determining the Poisson ratio of the first basic unit under different strain conditions under each length of the transverse gap of the first basic unit, and obtaining a relation table of the length of the transverse gap and the Poisson ratio; acquiring the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use, and calculating the Poisson ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; determining the length of the transverse slot corresponding to the Poisson ratio of each second basic unit according to a relation table of the length of the transverse slot and the Poisson ratio; replacing each second base unit with a first base unit corresponding to the transverse slit length corresponding to the poisson's ratio of the second base unit, resulting in the resulting bandage structure. The bandage is of a gap structure, and the length of the transverse gap of each basic unit of the bandage is determined, so that the bandage can keep high coverage rate with the joint part when the joint deforms, and the bandage is prevented from falling off or the patient is prevented from tearing.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a method of bandage creation at a joint in an embodiment of the invention;
FIG. 2 is a diagram of a first basic unit structure according to an embodiment of the present invention;
FIG. 3 is a block diagram of a seamless bandage in an embodiment of the present invention;
FIG. 4 is a schematic view of a bandage constructed in accordance with an embodiment of the present invention;
fig. 5 is a diagram of a bandage creation system at a joint in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method and a system for generating a bandage at a joint, which can ensure that the bandage can keep high coverage rate with the joint when the joint deforms, and avoid the bandage from falling off or the tearing of a patient.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Examples
Fig. 1 is a flowchart of a method for generating a bandage at a joint according to an embodiment of the present invention, and as shown in fig. 1, a method for generating a bandage at a joint includes:
step 101: acquiring structural parameters of the bandage with the gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps.
The first basic unit structure is shown in fig. 2, a is the length of the axial slit, l is the length of the transverse slit, c is the transverse distance of the convex part, the side length of the first basic unit is 10mm,
Figure BDA0002725513900000061
to make the poisson ratio span of the first basic unit sufficiently large, a is taken to be 4 mm.
Step 102: according to the structural parameters of the bandage with the gap, the transverse gap lengths of the first basic units are sequentially changed, the Poisson ratios of the first basic units under different strain conditions under each transverse gap length of the first basic units are determined, and a relation table of the transverse gap lengths and the Poisson ratios is obtained.
And storing the relation table of the transverse gap length and the Poisson ratio in a database.
Step 102, specifically comprising:
acquiring the side length of a first basic unit;
selecting one transverse slit length in the transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length; wherein one transverse slit in the transverse slit length set is 1mm, 1.5mm, 2mm, 2.5mm, …, 8mm in length; the strain conditions are transverse strain 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, corresponding longitudinal strain-0.00463 mm, -0.00936mm, -0.01418mm, -0.01909mm, -0.02407mm, the minus sign indicating direction.
And determining the ratio of the transverse variation to the side length as transverse strain, determining the ratio of the axial variation to the side length as axial strain, and determining the ratio of the axial strain to the transverse strain as Poisson ratio to obtain the Poisson ratio of the first basic unit under different strain conditions under the selected transverse gap length.
Judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; if not, returning to the step of selecting one transverse slit length in the transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length.
Step 103: acquiring the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no gap exists between every two adjacent second basic units.
Step 104: the poisson's ratio of each second elementary unit is calculated from the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use.
Step 104, specifically comprising:
calculating the poisson's ratio of the second elementary unit according to the following formula:
Figure BDA0002725513900000071
Figure BDA0002725513900000072
Figure BDA0002725513900000073
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure BDA0002725513900000074
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure BDA0002725513900000075
the transverse length of the second basic unit of the seamless bandage after use.
Fig. 3 shows a structure of a seamless bandage, fig. 3(a) shows a structure of a seamless bandage before use, and fig. 3(b) shows a structure of a seamless bandage after use.
Figure BDA0002725513900000076
And
Figure BDA0002725513900000077
the transverse length of the second basic unit of the seamless bandage after use is
Figure BDA0002725513900000078
And
Figure BDA0002725513900000079
when not equal, when the transverse strain is calculated by the above formula
Figure BDA00027255139000000710
Is composed of
Figure BDA00027255139000000711
And
Figure BDA00027255139000000712
is measured.
Figure BDA00027255139000000713
And
Figure BDA00027255139000000714
the axial length of the second basic unit of the seamless bandage after use
Figure BDA00027255139000000715
And
Figure BDA00027255139000000716
when not equal, when the transverse strain is calculated by the above formula
Figure BDA00027255139000000717
Is composed of
Figure BDA00027255139000000718
And
Figure BDA00027255139000000719
is measured.
Step 105: and determining the length of the transverse slot corresponding to the Poisson ratio of each second basic unit according to a relation table of the length of the transverse slot and the Poisson ratio.
Step 106: replacing each second base unit with a first base unit corresponding to the transverse slit length corresponding to the poisson's ratio of the second base unit, resulting in the resulting bandage structure.
Fig. 4 is a schematic diagram of the resulting bandage structure.
Fig. 5 is a diagram of a bandage creation system at a joint in an embodiment of the invention. As shown in fig. 5, a system for bandage generation at a joint includes:
a structural parameter acquiring module 201 of the bandage with gap, configured to acquire a structural parameter of the bandage with gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps.
The relation table generating module 202 for the transverse slit length and the poisson ratio is configured to sequentially change the transverse slit length of the first base unit according to the structural parameter of the bandage with slits, determine the poisson ratio of the first base unit under different strain conditions under each transverse slit length of the first base unit, and obtain the relation table between the transverse slit length and the poisson ratio.
And the storage module is used for storing the relation table of the length of the transverse gap and the Poisson ratio in a database.
The module 202 for generating a relationship table between the length of the transverse slot and the poisson ratio specifically includes:
a side length obtaining unit configured to obtain a side length of the first base unit;
the transverse variation and axial variation determining unit is used for selecting one transverse slit length in the transverse slit length set and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length;
and the strain and Poisson ratio determining unit is used for determining the ratio of the transverse variation to the side length as the transverse strain, determining the ratio of the axial variation to the side length as the axial strain, and determining the ratio of the axial strain to the transverse strain as the Poisson ratio to obtain the Poisson ratios of the first basic unit under different strain conditions under the selected transverse gap length.
The judging unit is used for judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; and if not, executing a transverse variation and axial variation determining unit.
The structural parameter acquisition module 203 of the seamless bandage is used for acquiring the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no gap exists between every two adjacent second basic units.
And the poisson ratio calculating module 204 of the second basic units is used for calculating the poisson ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use.
The poisson ratio calculating module 204 of the second basic unit specifically includes:
a poisson ratio calculating unit of the second basic unit, configured to calculate a poisson ratio of the second basic unit according to the following formula:
Figure BDA0002725513900000091
Figure BDA0002725513900000092
Figure BDA0002725513900000093
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure BDA0002725513900000094
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure BDA0002725513900000095
the transverse length of the second basic unit of the seamless bandage after use.
The transverse slot length determining module 205 corresponding to the poisson ratio of the second basic unit is configured to determine, according to the relationship table between the transverse slot length and the poisson ratio, a transverse slot length corresponding to the poisson ratio of each second basic unit.
A bandage generating module 206, configured to replace each second basic unit with a first basic unit corresponding to a transverse gap length corresponding to a poisson ratio of the second basic unit, so as to obtain a generated bandage structure.
For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The invention adopts the Poisson ratio unit as a unit structure for non-uniform filling, has large span of Poisson ratio range, is more suitable for the complex deformation of the skin of the joint part of the human body, and has higher customization degree compared with the traditional technical scheme. By means of the additive manufacturing technology, compared with a traditional customized production mode, the production can be put into service only by having a reasonable three-dimensional model without independently designing a process and a processing scheme, the forming speed is high, and the manufacturing period is short. By adopting a modularized design method, a complete unit structure information database is established, a bandage model of a using part is obtained, and after area division and analysis are carried out, corresponding units can be quickly matched in the established information database according to corresponding relations, and a target structure is generated and delivered for molding. The method can meet the requirement of high forming speed and realize certain personalized customization function. Compared with the prior bandage product, the bandage product can be designed according to each tiny area in the using structure, so that the product has better performance of fitting with the skin than the traditional product in the using process. Due to the structural diversity of the used parts in practical application, the heterogeneous structure of the invention has better adaptability.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.

Claims (8)

1. A method of bandage creation, comprising:
acquiring structural parameters of the bandage with the gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps;
sequentially changing the length of the transverse gap of the first basic unit according to the structural parameters of the bandage with the gap, determining the Poisson ratio of the first basic unit under different strain conditions under each length of the transverse gap of the first basic unit, and obtaining a relation table of the length of the transverse gap and the Poisson ratio;
acquiring the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no seam exists between every two adjacent second basic units;
calculating the Poisson's ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use;
determining the length of the transverse slot corresponding to the Poisson ratio of each second basic unit according to the relation table of the length of the transverse slot and the Poisson ratio;
replacing each of the second base units with a first base unit corresponding to a transverse slit length corresponding to the poisson's ratio of the second base unit, resulting in the resulting bandage structure.
2. The method for generating a bandage of claim 1, wherein the sequentially changing the transverse slit lengths of the first basic unit according to the structural parameters of the bandage with slits to determine the poisson's ratio of the first basic unit under different strains at each transverse slit length of the first basic unit comprises:
acquiring the side length of the first basic unit;
selecting one transverse slit length in a transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length; a plurality of mutually unequal transverse gap lengths are arranged in the transverse gap length set;
for each strain situation, determining the ratio of the transverse variation to the side length as transverse strain, determining the ratio of the axial variation to the side length as axial strain, and determining the ratio of the axial strain to the transverse strain as a poisson ratio to obtain the poisson ratios of the first basic unit under different strain situations under the selected transverse gap length;
judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; if not, returning to the step of selecting one transverse slit length in the transverse slit length set, and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length.
3. The bandage generation method according to claim 2, characterized in that said calculating the poisson ratio of each of said second elementary units from the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use comprises:
calculating the Poisson's ratio of the second elementary unit according to the following formula:
Figure FDA0002725513890000021
Figure FDA0002725513890000022
Figure FDA0002725513890000023
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure FDA0002725513890000024
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure FDA0002725513890000025
the transverse length of the second basic unit of the seamless bandage after use.
4. The method of claim 3, further comprising, after said obtaining a table of transverse slit length to Poisson's ratio:
and storing the relation table of the length of the transverse gap and the Poisson ratio in a database.
5. A bandage generation system, comprising:
the structural parameter acquisition module of the bandage with the gap is used for acquiring the structural parameters of the bandage with the gap; the bandage with the gap comprises a plurality of first basic units distributed in an array structure, a gap is arranged between every two adjacent first basic units, each first basic unit is provided with a transverse gap and two axial gaps, and the transverse gap is arranged between the two axial gaps;
a relation table generating module of the transverse gap length and the poisson ratio, configured to sequentially change the transverse gap length of the first base unit according to the structural parameter of the bandage with gap, determine the poisson ratio of the first base unit under different strain conditions for each transverse gap length of the first base unit, and obtain a relation table of the transverse gap length and the poisson ratio;
the structure parameter acquisition module of the seamless bandage is used for acquiring the structure parameters of the seamless bandage before use and the structure parameters of the seamless bandage after use; the seamless bandage comprises a plurality of second basic units distributed in an array structure, and no seam exists between every two adjacent second basic units;
the poisson ratio calculation module of the second basic units is used for calculating the poisson ratio of each second basic unit according to the structural parameters of the seamless bandage before use and the structural parameters of the seamless bandage after use;
the transverse slit length determining module corresponding to the Poisson ratio of the second basic units is used for determining the transverse slit length corresponding to the Poisson ratio of each second basic unit according to the relation table of the transverse slit length and the Poisson ratio;
and the bandage generating module is used for replacing each second basic unit with a first basic unit corresponding to the transverse gap length corresponding to the Poisson ratio of the second basic unit to obtain a generated bandage structure.
6. The bandage generation system of claim 5 wherein the cross-slit length to poisson's ratio relationship table generation module comprises:
a side length obtaining unit configured to obtain a side length of the first base unit;
the transverse variation and axial variation determining unit is used for selecting one transverse slit length in the transverse slit length set and determining the transverse variation and the axial variation of the first basic unit under each strain condition under the selected transverse slit length; a plurality of mutually unequal transverse gap lengths are arranged in the transverse gap length set;
the strain and poisson ratio determining unit is used for determining the ratio of the transverse variation to the side length as transverse strain, determining the ratio of the axial variation to the side length as axial strain, and determining the ratio of the axial strain to the transverse strain as poisson ratio to obtain the poisson ratios of the first basic unit under different strain conditions under the selected transverse gap length;
the judging unit is used for judging whether all the transverse gap lengths in the transverse gap length set are selected completely; if so, obtaining the Poisson's ratio of the first basic unit under each strain condition under each transverse slit length of the first basic unit; and if not, executing the transverse variation and axial variation determining unit.
7. The bandage generation system of claim 6 wherein the poisson's ratio calculation module of the second base unit specifically comprises:
a poisson ratio calculating unit of the second basic unit, configured to calculate a poisson ratio of the second basic unit according to the following formula:
Figure FDA0002725513890000041
Figure FDA0002725513890000042
Figure FDA0002725513890000043
wherein P is Poisson's ratio, epsilon1For transverse strain,. epsilon2In order to be under axial strain,
Figure FDA0002725513890000044
for the axial length of the second basic unit of the seamless bandage after use, lintFor the side length of the second base unit of the seamless bandage before use,
Figure FDA0002725513890000045
the transverse length of the second basic unit of the seamless bandage after use.
8. The bandage generation system of claim 7 further comprising:
and the storage module is used for storing the relation table of the length of the transverse gap and the Poisson ratio in a database.
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