CN114088439A - Grading evaluation method for shaping efficacy of waist and back splint - Google Patents
Grading evaluation method for shaping efficacy of waist and back splint Download PDFInfo
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- 238000007493 shaping process Methods 0.000 title claims abstract description 45
- 238000011156 evaluation Methods 0.000 title claims abstract description 29
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 18
- 238000013507 mapping Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 17
- 210000001015 abdomen Anatomy 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 9
- 230000003187 abdominal effect Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
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- 238000011158 quantitative evaluation Methods 0.000 claims description 3
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- 238000001514 detection method Methods 0.000 abstract description 2
- 210000000038 chest Anatomy 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 210000004705 lumbosacral region Anatomy 0.000 description 3
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- 210000000988 bone and bone Anatomy 0.000 description 1
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Abstract
The invention relates to a grading evaluation method for the shaping efficacy of a waist-back splint, which takes the change rate of the circumference, the body width and the precursor thickness of each circumference before and after wearing various waist-back splints as the shaping efficacy and establishes a regression model of the pressure-shaping efficacy of each circumference of the waist-back splint; establishing a comprehensive pressure evaluation system of each girth of the waist-back clamp, and determining a pressure weight coefficient of each pressure measurement point; and establishing a mapping relation between the comprehensive pressure value or the average pressure value and the shaping efficacy value, and representing the shaping efficacy grade of the waist-back clamp by using the pressure index. Aiming at the problem that no evaluation method exists at present for the shaping efficacy of the waist and back splint product, the provided grading model for the shaping efficacy of the waist and back splint is practical and feasible, and provides basis for product detection and selection of consumers.
Description
Technical Field
The invention relates to a body shaping clothes quality monitoring technology, in particular to a grading evaluation method for waist and back clamp shaping efficacy.
Background
According to the subdivision of the body shaping clothes products, the waist and back clamps are taken as a type of adjustable body shaping clothes and mainly act on the waist, the abdomen and the back of the upper trunk of a human body. At present, a plurality of scholars at home and abroad have little research on waist and back clip products for adjusting the upper trunk of a human body, and focus on two aspects: the method comprises the steps of firstly, exploring a pressure threshold value based on objective experiments; secondly, a prediction model which takes the shaping effect as main output is established based on subjective evaluation. The research conclusion is that the pressure comfort or the shaping effect of a certain index is evaluated singly, the function evaluation of the body shaping clothes product in an actual scene is difficult to apply, and the practical application value is lacked.
At present, the standards relating to waist and back clip products are: FZ/T73019.2-2013 knitted body-shaping underwear adjustment type and FZ/T73019.1-2017 knitted body-shaping underwear elastic type. The two standards require the internal quality and the appearance quality of the body-shaping underwear including a waist back splint product, and the internal quality specifically comprises 6 items of dyeing fastness, seam strength, fiber content, stretching elastic recovery rate, formaldehyde content, PH value and the like; the appearance quality includes 3 items of specification size difference, self size difference, surface flaw and the like. These criteria do not relate to a graded evaluation of the shaping efficacy of the lumbar clips. The efficiency grading evaluation is carried out on the waist-back splint, so that the production and quality control of enterprises on the waist-back splint products can be guided, and the market sale of the waist-back splint is standardized; the consumer may also be instructed to select the lumbar spine clamp product correctly.
Disclosure of Invention
Aiming at the problem of functional evaluation of a waist and back splint product, a grading evaluation method for the shaping efficacy of the waist and back splint is provided.
The technical scheme of the invention is as follows: a grading evaluation method for shaping efficacy of a waist and back splint specifically comprises the following steps:
1) selecting various styles to test the waist-back clamp and the testees with various body types and body states;
2) testing and recording static parameters of a testee before and after wearing the waist-back clip, wherein the static parameters comprise lower chest circumference height, waist circumference height and abdominal circumference height;
3) testing and recording three-dimensional human body scanning data of a subject: the method comprises the following steps that a subject carries out three-dimensional human body scanning respectively in the state of wearing various test waist clamps randomly without wearing the waist clamps, and each state is tested for a plurality of times to obtain body surface point cloud data;
4) calculating the shaping work value of the waist and back clamp: processing the three-dimensional scanning result obtained in the step 3) on the basis of the static parameters obtained in the step 2), obtaining a horizontal section curve of the human body, extracting quantitative evaluation index values, and calculating the change rate of the girth, the body width and the thickness of the front body of each girth before and after wearing various waist-back clamps;
5) measuring the contact pressure value: the testee wears different types of waist back clamps, and a pressure testing system is adopted to test the pressure value of the pressure testing point on each circumference after wearing the waist back clamps;
6) establishing a regression model of the waist and back clamps with various circumference pressure-shaping effects;
7) establishing a comprehensive pressure evaluation system of each girth of the waist-back clamp, and determining a pressure weight coefficient of each pressure measurement point;
8) and (3) evaluating the molding efficacy grade of the waist back splint, namely establishing a mapping relation between a comprehensive pressure value or an average pressure value and the molding efficacy value, and representing the molding efficacy grade of the waist back splint by using a pressure index.
Further, the shaping effective value of the waist-back splint in the step 4) refers to the perimeter change Δ P, the body width change Δ W and the front body thickness change Δ T of each circumference, on the horizontal section of each circumference, the perimeter is the perimeter of the closed curve of the horizontal section, the body width refers to the thickness of the human body in the frontal axis direction, and the body thickness refers to the width of the human body in the sagittal axis direction.
Further, the pressure test points in the step 5) comprise steel skeleton structure points and fabric contact points.
Further, the step 7) is implemented by the following steps: establishing a pressure-efficacy regression model of three circumferences of a chest circumference, a waist circumference and an abdomen circumference under the waist-back clamp; comprehensively sequencing and evaluating the pressure values of the pressure measurement points of the chest circumference, the waist circumference and the abdomen circumference under the waist and back clips by using a fuzzy opinion centralized decision-making method; and (4) solving the weight value of each pressure measurement point by using a mean square difference method and establishing a linear model of the comprehensive pressure.
The invention has the beneficial effects that: the grading evaluation method for the shaping efficacy of the waist and back splint is practical and feasible aiming at the problem that the existing evaluation method for the shaping efficacy of the waist and back splint product is unavailable, and provides a basis for product detection and selection of consumers.
Drawings
FIG. 1 is a front pressure measurement point distribution diagram of a lumbar spine clamp product of the present invention;
fig. 2 is a distribution diagram of the back pressure measurement points of the lumbar spine clamp product of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A grading evaluation method for molding efficacy of a waist and back splint comprises the following steps:
(1) and selecting and testing the waist and back clamps and the subjects. Testing X types of waist and back clips, and Y types of test subjects;
(2) the static parameters of the subjects before and after wearing the waist-back clip were tested and recorded. The static parameters comprise the height of the underbust, the height of the waist and the height of the abdomen, which are measured by a Martin body measuring instrument;
(3) and testing and recording three-dimensional human body scanning data of the testee. The subject respectively carries out three-dimensional human body scanning under the states of not wearing the waist clip and randomly wearing various test waist clips, each state is tested for 3 times, and body surface point cloud data are obtained;
(4) and calculating the shaping work effect value of the waist and back clamp. Processing a three-dimensional scanning result on the basis of static parameters to obtain a horizontal section curve of a human body, extracting quantitative evaluation index values, and calculating the change rate of the circumference, the body width and the thickness of the front body of each girth before and after wearing various waist-back clamps, wherein the unit is;
(5) the contact pressure value is measured. The testee wears different types of waist-back clamps, and a pressure test system is adopted to test the pressure value of the pressure test point on each circumference after wearing the waist-back clamps, wherein the unit is kPa;
(6) establishing a regression model of the waist and back clamps with various circumference pressure-shaping effects;
(7) establishing a comprehensive pressure evaluation system of each girth of the waist-back clamp, and determining a pressure weight coefficient of each pressure measurement point;
(8) and evaluating the molding efficacy grade of the waist and back splint. Establishing a mapping relation between the comprehensive pressure value (or the average pressure value) and the shaping efficacy value, and representing the shaping efficacy grade of the waist-back clamp by using the pressure index.
In the step (1), the testee should select women with similar age, similar height, different fat and thin bodies and healthy body, so that the accuracy of evaluation is improved.
In the step (4), the shaping parts of the waist and back clip acting on the upper trunk of the human body are mainly lower chest circumference, waist circumference and abdominal circumference, and 3 indexes of perimeter change delta P (Perimeter), body width change delta W (width) and precursor thickness change delta T (Thick) of all circumferences are extracted to represent the shaping effect of the waist and back clip. On the horizontal section of each circumference, the circumference, i.e., the circumference of the closed curve of the horizontal section, refers to the thickness of the human body in the frontal axis (frontal axis, also called coronal axis, which is a horizontal line in the left-right direction and an axis perpendicular to the vertical axis and the sagittal axis) direction, and the body thickness refers to the width of the human body in the sagittal axis (sagittal axis is a horizontal line in the front-back direction and an axis perpendicular to the vertical axis and the frontal axis) direction. Because the three-dimensional scanning can only extract the body surface points, and after the waist clip is worn, the middle part of the back of the human body is greatly influenced by the thicknesses of the fabric and the steel ribs of the waist clip, only the thickness of the front side of the body, namely the thickness of the front body, is extracted. The girth, body width and precursor thickness of the bare body Undressed # are P0、W0、T0In the attached state is Pn、Wn、Tn. Since the size of the human body is reduced after wearing the waist-back clip (i.e., P)0>Pn) Δ P/Δ W/Δ T is described as the rate of change of circumference/body width/precursor thickness reduction expressed in percentage, and calculated as shown in equations (1) to (3).
The pressure measurement points in the step (5) comprise steel skeleton structure points and fabric contact points, and are distributed as shown in the pressure measurement point distribution diagrams of fig. 1 and 2.
Step (7), establishing a pressure-efficacy regression model of three circumferences of the chest circumference, the waist circumference and the abdomen circumference under the waist and back clamps based on a multivariate regression method; comprehensively sequencing and evaluating the pressure values of the pressure measurement points of the chest circumference, the waist circumference and the abdomen circumference under the waist and back clips by using a fuzzy opinion centralized decision-making method; and (3) solving the weight value of each pressure measurement point by using a mean square difference method and establishing a linear model of the comprehensive pressure: CP ═ c1*P1+c2*P2+...+cn*PnWherein, C ═ { C ═ C1,c2,c3,...,cnIs a set of weights for pressure values at each pressure measurement point, PnThe pressure value of each pressure test point is obtained. Defining 3 efficacy levels as I, II and III levels respectively, and obtaining a final efficacy grading model of the waist and back splint based on the comprehensive pressure values, wherein the efficacy grading model of the waist and back splint is shown in a table 1;
TABLE 1
Step (8), compared with the calculation of the comprehensive pressure value, the method for evaluating by using the average pressure value in the actual production is more common and has stronger operability. And (3) calculating the average pressure values of the underbust circumference, the waist circumference and the abdominal circumference, and establishing a waist and back splint efficacy grading model based on the comprehensive pressure values, such as the efficacy grading optimization model of the waist and back splint shown in table 2.
TABLE 2
The following examples are intended to illustrate the use of the invention, but are not intended to limit the scope of the invention.
The implementation steps of the grading evaluation method for the shaping effect of the waist and back splint are as follows:
(1) selecting a test subject and testing a waist-back clip. Selecting 9 subjects, and selecting 3 test waist-back clips;
(2) the static parameters of the subjects before and after wearing the waist-back clip were tested and recorded. Static parameters including underbust height, waist height, abdominal height were tested for 9 subjects. The human body static parameters are defined in table 3;
TABLE 3
| Parameter(s) | Definition of |
| High underbust | The vertical distance from the lower edge of the breast to the ground, in units of "cm". |
| High waist circumference | The vertical distance from the line between the upper end of the crotch bone and the lower edge of the ribs to the ground is in cm. |
| Height of abdominal girth | Most convex point of abdomen to groundThe vertical distance of the faces, in units of "cm". |
(3) And testing and recording three-dimensional human body scanning data of the testee. The 9 subjects respectively do three-dimensional human body scanning without wearing the waist-back clamp and randomly wearing 3-pattern test waist-back clamps, and each pattern is tested for 3 times;
(4) and calculating the shaping work effect value of the waist and back clamp. Processing the three-dimensional scanning result by using tools such as Imageware and Matlab, and calculating the change values of the circumference, the body width and the precursor thickness of each circumference of 9 subjects before and after wearing 3 waist-back clamps, wherein the change values are shown in the shaping effective value (%) of the waist-back clamp shown in Table 4;
TABLE 4
(5) The contact pressure is measured and the mean pressure value for each circumference is calculated. The pressure values of 20 pressure test points after the waist-back clamp is worn are tested by adopting an air bag type pressure test system, and the average pressure values of the lower chest circumference, the waist circumference and the abdomen circumference are calculated, wherein the average pressure values (kPa) of the circumference are shown in the table 5:
TABLE 5
(6) Based on a multiple regression method, as shown in pressure test point distribution diagrams of fig. 1 and 2, a pressure-efficacy regression model (VP pressure-circumference variation, VW pressure-body width variation, VT pressure-precursor thickness variation) of three circumferences of the chest, waist and abdomen under the waist-back splint is established as follows:
VPlower chest circumference＝-3.035+0.441*W1+0.585*W2+0.464*W3+0.485*W4+0.52*S1+0.498*S2
VWLower chest circumference＝-6.531+0.884*W1+0.885*W2+0.924*W3+0.952*W4+0.952*S1+1.008*S2
VTLower chest circumference＝-9.02+1.138*W1+1.535*W2+1.313*W3+0.824*W4+1.28*S1+1.349*S2
VPWaist circumference＝-3.294+0.448*W5+0.528*W6+0.605*W7+0.479*W8+0.63*S3+0.456*S4+0.454*S5
VWWaist circumference＝-5.437+1.128*W6+1.445*W7+1.588*W8+0.955*S3+1.057*S4+0.97*S5
VTWaist circumference＝-9.066+1.417*W5+1.559*W6+0.927*W7+1.329*W8+1.43*S3+1.314*S4+0.954*S5
VPWaist circumference＝-4.904+0.433*W10+0.608*W11+0.712*W12+0.707*S6+0.45*S7+0.534*S8
VWWaist circumference＝-5.08+0.449*W9+0.595*W10+0.475*W11+0.643*W12+0.71*S6+0.537*S7+0.534*S8
VTWaist circumference＝-10.155+1.165*W9+1.157*W10+1.048*W11+1.177*W12+1*S6+1.102*S7+0.82*S8
(7) The pressure values of the measurement points of the chest circumference, the waist circumference and the abdomen circumference under the waist and back clips are comprehensively sequenced and evaluated by using a fuzzy opinion centralized decision-making method, and the main process comprises 3 steps: and constructing an evaluation system, distributing weights, calculating final weighted arrival numbers and sequencing. Of the lower bustThe evaluation indexes comprise 6 pressure measurement points of W1, W2, W3, W4, S1 and S2; the evaluation index of waist circumference includes 7 pressure measurement points of W5, W6, W7, W8, S3, S4, S5; evaluation indexes of abdominal girth include W9, W10, W11, W12, S6, S7, and S8. Establishing a linear model CP ═ c of the integrated pressure1Pressure points 1+ c2Pressure point 2+. + cnPressure points n. Wherein, C ═ { C ═ C1,c2,c3,...,cnAnd the weight set of the pressure value of each measuring point is used as the weight.
The weight value C of each pressure measurement point obtained by using the mean square error method has the following result:
Clower chest circumference＝[0.15 0.12 0.12 0.11 0.31 0.19]，
CWaist circumference＝[0.12 0.09 0.10 0.12 0.13 0.25 0.19]，
CWaist circumference＝[0.11 0.06 0.15 0.12 0.12 0.25 0.18]。
(8) And evaluating the molding efficacy grade of the waist and back splint. And establishing a mapping relation between the comprehensive pressure value and the shaping efficacy value by adopting an indirect grading method, and representing the shaping efficacy grade of the waist-back splint by using the comprehensive pressure index. The pressure ranges when the subject is wearing a2 are: 1.6kPa to 2.1kPa, the shaping efficacy ranges of the circumference, the body width and the precursor thickness of the lower chest circumference are respectively 1.5 to 3.1 percent, 2.2 to 5.0 percent and 2.5 to 6.3 percent, the shaping efficacy ranges of the circumference, the body width and the precursor thickness of the waist circumference are respectively 2.1 to 4.3 percent, 5.9 to 8.9 percent and 5.0 to 9.0 percent, the shaping efficacy ranges of the circumference, the body width and the precursor thickness of the abdomen circumference are respectively 1.2 to 3.4 percent, 1.2 to 3.1 percent and 1.4 to 5.3 percent, and the shaping efficacy can be evaluated to be II grade.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. A grading evaluation method for the shaping efficacy of a waist and back splint is characterized by comprising the following steps:
1) selecting various styles to test the waist-back clamp and the testees with various body types and body states;
2) testing and recording static parameters of a testee before and after wearing the waist-back clip, wherein the static parameters comprise lower chest circumference height, waist circumference height and abdominal circumference height;
3) testing and recording three-dimensional human body scanning data of a subject: the method comprises the following steps that a subject carries out three-dimensional human body scanning respectively in the state of wearing various test waist clamps randomly without wearing the waist clamps, and each state is tested for a plurality of times to obtain body surface point cloud data;
4) calculating the shaping work value of the waist and back clamp: processing the three-dimensional scanning result obtained in the step 3) on the basis of the static parameters obtained in the step 2), obtaining a horizontal section curve of the human body, extracting quantitative evaluation index values, and calculating the change rate of the girth, the body width and the thickness of the front body of each girth before and after wearing various waist-back clamps;
5) measuring the contact pressure value: the testee wears different types of waist back clamps, and a pressure testing system is adopted to test the pressure value of the pressure testing point on each circumference after wearing the waist back clamps;
6) establishing a regression model of the waist and back clamps with various circumference pressure-shaping effects;
7) establishing a comprehensive pressure evaluation system of each girth of the waist-back clamp, and determining a pressure weight coefficient of each pressure measurement point;
8) and (3) evaluating the molding efficacy grade of the waist back splint, namely establishing a mapping relation between a comprehensive pressure value or an average pressure value and the molding efficacy value, and representing the molding efficacy grade of the waist back splint by using a pressure index.
2. The grading evaluation method for the molding efficacy of the waist and back splint according to claim 1, wherein the molding efficacy values of the waist and back splint in step 4) refer to the perimeter change Δ P, the body width change Δ W and the front body thickness change Δ T of each circumference, and on the horizontal section of each circumference, the perimeter is the perimeter of the closed curve of the horizontal section, the body width refers to the thickness of the human body in the frontal axis direction, and the body thickness refers to the width of the human body in the sagittal axis direction.
3. The grading evaluation method for the molding efficacy of the waist back splint according to claim 1, wherein the pressure test points in the step 5) comprise steel skeleton structure points and fabric contact points.
4. The grading evaluation method for the molding efficacy of the waist and back splint according to claim 1, wherein the step 7) is implemented by the following steps: establishing a pressure-efficacy regression model of three circumferences of a chest circumference, a waist circumference and an abdomen circumference under the waist-back clamp; comprehensively sequencing and evaluating the pressure values of the pressure measurement points of the chest circumference, the waist circumference and the abdomen circumference under the waist and back clips by using a fuzzy opinion centralized decision-making method; and (4) solving the weight value of each pressure measurement point by using a mean square difference method and establishing a linear model of the comprehensive pressure.
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