RU2727597C1 - Method of measuring areas of body waistcoats - Google Patents

Abstract

FIELD: measurement.SUBSTANCE: invention relates to measurement of dimensional features of special items on human figure. Essence of the proposed method consists in implementation of two stages - first (measuring), where photographic images are obtained in contactless in five projections (frontal, dorsal, two lateral, upper) with transmission of information to a PC with subsequent shaping of a three-dimensional surface of a specific section in a three-dimensional computer-aided design (CAD system of STAPRIM type), and second stage (design), consisting in determination of total actual area, calculation of matrix of combinations of standard sizes with growth groups with indication of probability of given combination, scaling coefficients, relative ratio of folded areas of protection of specific items taking into account probability of approach means of destruction, comparison of actual and standard results by areas, determination of measurement error.EFFECT: method provides non-contact measurement of actual areas of special items taking into account probability of approach of weapons and comparative evaluation with requirements.1 cl, 1 dwg, 7 tbl

Description

The invention relates to the field of measuring the dimensional characteristics of special. products on a human figure.

The known method of non-contact measurement of straight linear dimensional features of a human figure includes marking anthropometric points on the human body and obtaining photographic images from the side, back and front of the human figure [1]. To photograph a person from the side, the heel point of the feet is oriented along a predetermined line parallel to the optical axis of the lens and located on the platform for taking a figure; for photographing a person in front and behind, the heel point of the feet is oriented along a predetermined line perpendicular to the optical axis of the lens and located on the platform for photographing the figure. After obtaining photographic images of a human figure, their picture coordinates are measured as the distance from each point to both coordinate axes passing through the center of the photographic image, the three-dimensional coordinates of these points are calculated using the measured values of their picture coordinates in the views of photographic images from the side, front and back of the figure. The disadvantages of this method are that the definition of the unfolding of the measurement surface and the determination of the area of the volumetric figure is not performed, the system of three-dimensional computer-aided design is not used.

A known method of obtaining a scan of a tight-fitting product [2]. Its essence lies in the fact that on the surface of the figure or dummy base points are marked, their coordinates are taken, along which a linear frame is built, including horizontal sections at the main anthropometric levels, the frontal and profile projection of the dummy or figure is built, and the coordinates of the base points are transferred to the plane and their increments. On the frontal and profile projections, longitudinal dividing lines are applied, which determine the shape of the product parts, the intersection points of these longitudinal lines with horizontal planes drawn through the main anthropometric points are found, and the intersection points are transferred to the horizontal sections of the figure or dummy. The disadvantages of this method are that contactless measurements of linear dimensions and determination of the area of a three-dimensional figure are not technically envisaged, and a three-dimensional computer-aided design system is not used.

The closest solution to the technical essence and the achieved result of the proposed technical solution is a method of designing clothes based on non-contact anthropometry [3]. The method includes measuring the surface of the consumer's body using computer vision systems by simultaneously photographing the consumer from different angles. Then the measurement data is transferred to the computer. They are formed from stereopair images. Each stereopair is decoded with the construction of the surface corresponding to the part of the body being measured. Form the surface of the virtual mannequin. Transfer data to CAD of clothing. A three-dimensional structure is deployed on a plane, taking into account the properties of materials. The disadvantages of this method is that the upper projection is not used for measurements, the actual area of the spec is not determined. products and no comparative assessment is made with the specified requirements.

The task of the proposed method is the non-contact measurement of the actual areas of special. products taking into account the likelihood of the approach of means of destruction and a comparative assessment with the specified requirements according to the algorithm.

FIG. 1 shows an anthropometric dummy for body armor used in the first stage. It is a measuring system of direct linear dimensional characteristics of special. products (body armor). The system includes: 1 - special. product (body armor) on a typical mounting dummy, 2 - left side video camera, 3 - frontal video camera, 4 - right side video camera, 5 - dorsal video camera, 6 - upper video camera, 7 - computer with special software (CAD type STAPRIM).

This solution is based on the concept of complex composite solutions for specials. products, which is based on the selection and use of software products that provide three-dimensional design of the original model structures of special. products, their gradation in accordance with a given scale of standard sizes.

The essence of the proposed method consists in the implementation of two stages - the first (measuring), where contactless photographic images are obtained in five projections (frontal, dorsal, two lateral, upper) with the transfer of information to a PC with the subsequent shaping of the three-dimensional surface of the special. products in a three-dimensional computer-aided design system (CAD type STAPRIM) and the second stage (calculated), consisting in determining the total actual area, calculating a matrix of combinations of standard sizes with growth groups indicating the probability of this combination, scale factors, the relative share of rolled-up values of special protection areas. products, taking into account the likelihood of the approach of means of destruction, comparing actual and standard results by area, determining the measurement error.

At the first stage, non-contact measurement of direct linear dimensional characteristics of special. products (body armor) by obtaining photographic images in five projections (frontal, dorsal, two lateral, upper) with the transfer of information to a PC, where the shaping of a three-dimensional surface is special. products are implemented in a three-dimensional computer-aided design system (CAD type STAPRIM). Special design products in the STAPRIM system are based on a linear frame of the torso (mannequin) of the figure, built using projection measurements and a system of frontal, sagittal and horizontal sections, obtained by contactless methods and by automatically transforming the frame of a typical figure close in parameters. Traditional linear measurements of dimensional characteristics are used as control ones after setting the volumetric image of the torso on the monitor screen. The three-dimensional characteristic of typical figures is entered into the system database (by standard sizes). Thus, due to the conscious choice of the values of the above parameters of the three-dimensional image of the special model. products, it turns out the possibility of purposeful synthesis of geometric models of functional units of special. products and a visual assessment of the rationality of their shape and size. Next, an automatic construction of unfolding of special parts is performed. products. The unfolding algorithm provides automatic laying of the projected volumetric surface. The development of model structures in the presence of initial geometric objects is not particularly difficult and is implemented in any of the well-known CAD systems based on traditional plane design algorithms (Grazia, Comtensse, Investronica, etc.), after importing unfolded details of silhouette structures into their environment. When programming the model, special. of products, libraries of structural modules are used.

At the second stage, the coordinates of the outlines of special fragments are determined. products, their position on the fixed dummy, the total actual area, the calculation of the matrix of combinations of standard sizes with growth groups, indicating the probability of this combination, scale factors, the relative proportion of rolled-up values of the special protection areas. products, taking into account the likelihood of the approach of means of destruction, comparing actual and standard results by area, determining the measurement error.

The results of determining the actual area of protection of special. products are entered in table 1.

Reference information on symbols:

, дм² - площадь ЗК в проекции

для i-ой части тела, j-ой ЗК, р - полностью, Т_m - m-ый типоразмер СИБ, Н_n - n-ая группа роста;Indexing projective area of the protection fragment

, dm ² - ZK area in projection

for the i-th part of the body, j-th ZK, p - completely, T _m - m-th standard size of NIB, H _n - n-th growth group;

- индекс основной проекции: 1 - фронтальная, 2 - боковая, 3 - дорсальная, 4 - верхняя;

- index of the main projection: 1 - frontal, 2 - lateral, 3 - dorsal, 4 - upper;

- индекс части тела: 1 - голова, 2 - грудь, 3 - живот, 4 - руки, 5 - ноги;

- body part index: 1 - head, 2 - chest, 3 - abdomen, 4 - arms, 5 - legs;

- индекс варианта ЗК: 1 - самая слабая, далее по мере усиления качества защиты до 8;

- ZK option index: 1 - the weakest, then as the quality of protection increases to 8;

p, g - index of the ZK coverage: p - covers the entire area of the fragment, g - also covers the LHO;

- индекс типоразмера СИБ: 1 - самый малый, 2, 3… - промежуточные, m -самый большой;

- NIB standard size index: 1 - the smallest, 2, 3 ... - intermediate, m - the largest;

- индекс ростовой группы: 1 - малый рост, 2 и т.д. - средние, n - самый большой.

- growth group index: 1 - small growth, 2, etc. - medium, n is the largest.

Reference Information:

In the presence of several standard sizes, BZ compose a matrix of combinations of standard sizes with growth groups, indicating the probability of this combination. The type of such a matrix of combinations for two or three standard sizes of BZ is represented by matrices

.where m is the number of the standard size (starting with the smallest one) and n is the number of the growth group, N is the number of non-empty cells,

...

Collapsing areas by standard sizes and growth groups.

The results of determining the scale factors and are entered in table 3.

Reference Information:

The scale factor is the growth similarity factor determined by the formula:

, см - средний рост для данного типоразмера.Where

, cm - average height for a given standard size.

Calculation of bilinear form

, в %.Determination of the relative shares of rolled-up area values (table 3),

, in %.

Reference Information:

The relative importance of the collapsed area estimate:

,

,

- свернутая оценка;Where:

- collapsed estimate;

- площадь защиты, заданная в исходных данных; (v) - символ заданности.

- protection area specified in the initial data; (v) - the symbol of the given.

Comparison of normative and actual results (table 6).

Area estimates, divided by damaging elements (table 7),

, %.

,%.

List of sources used:

1. RF patent for invention No. 2264768 dated November 27, 2005.

2. RF patent for invention No. 2318417 dated 10.03.2008.

3. RF patent for invention №2358628 dated 20.06.2009.

Claims (1)

A method for measuring the areas of protection of body armor, according to which, when implementing two stages (measuring and calculated), non-contact measurement of direct linear dimensional characteristics of body armor is made by obtaining photographic images in five projections (frontal, dorsal, two side, top) with information transfer to a PC, where the shaping the three-dimensional surface of the bulletproof vest is implemented in a CAD system of the STAPRIM type, followed by automatic construction of sweeps of the bulletproof vest parts to further determine the coordinates of the outline of the bulletproof vest fragments, their position on the fixed dummy and the total actual area, calculate the matrix of combinations of standard sizes with growth groups indicating the probability of this combination, scale factors, the relative share of the reduced values of the protection areas of the special item, taking into account the likelihood of the approach of the means of destruction, comparing the actual and standard results by area, determining the measurement error.

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