JP5920724B2 - Information processing apparatus, information processing method, and information processing program - Google Patents

Description

  The technique disclosed in the present application relates to a technique for calculating the movement of a body wearing a wearing object using a computer.

  2. Description of the Related Art Conventionally, techniques for calculating the wearing state of clothes on a human body using a computer have been developed. For example, Patent Document 1 discloses a technique for calculating a displacement of three-dimensional polygon data representing a body shape based on body movement information and calculating a distribution of design support information based on the calculated displacement. Further, in Patent Document 2, a pattern model of clothing is divided into a plurality of elements, mechanical characteristics are given to each element, and the equation of motion of each element is solved using a finite element method, thereby deforming the pattern model. A technique for virtually wearing clothes on a human body model is disclosed. Patent Document 3 discloses a wearing simulation method for obtaining clothing pressure from a clothing shape model and a human body shape model. Patent Document 4 discloses a wearing state analysis method for predicting and calculating the wearing state of clothing / apparel at an arbitrary position on a human body model. Patent Document 5 discloses a clothing simulation apparatus capable of expressing wrinkles according to the force acting on the surface of the clothing model in consideration of the contact between the clothing model and the body model.

Japanese Patent No. 3831348 JP 2009-230563 A Japanese Patent Publication No. 9-34952 JP 2000-3383 A JP 2005-11027 A

  However, there is no known calculation method for investigating the influence of a worn article on muscle activity when the user moves the body while wearing the worn article such as clothes.

  Therefore, an object of this invention is to provide the technique which can calculate the influence which a wear thing has on muscle activity, when a wear thing is mounted | worn and a body is moved.

An information processing apparatus according to an embodiment of the present invention includes a body motion information input unit that inputs body time-series data indicating body movement, an external force input unit that inputs external force data indicating external force acting on the body, and body wear A wear data input unit for inputting wear data represented by surface elements indicating tensions in a plurality of directions generated along with deformation of the object, and a plurality of bones connected to each other via a joint so as to be rotatable. The musculoskeletal model includes a plurality of bone elements indicating a plurality of muscle elements that represent a plurality of muscles that exert forces between the plurality of bones by expanding and contracting, and the plurality of bone elements are represented by the external force data. In response to the external force indicated by and the force indicated by the wear data, when the body time series data moves, a mechanical information calculation unit that calculates a mechanical quantity generated by the plurality of muscle elements; Mechanical information E Bei muscle activity calculation section that calculates a value indicating the muscle elements each work contributes to the development of the calculated physical quantity by calculating unit, the wearable data generated in deformation and the surface elements of the surface element Including information indicating a relationship with tensions in a plurality of directions, wherein the mechanical information calculation unit calculates a deformation of the surface element when the bone element performs a movement indicated by the body time-series data, and the wear The force generated by the deformation of the surface element is calculated using the object data.

  By the said structure, when mounting | wearing a wearing thing and moving a body, the influence which a wearing thing has on muscle activity is computable.

FIG. 1 is a functional block diagram illustrating a configuration example of the information processing apparatus according to the first embodiment. FIG. 2 is a flowchart illustrating an operation example of the information processing apparatus. FIG. 3 is a diagram illustrating an example of a part of the musculoskeletal model. FIG. 4 is a diagram illustrating an example in which data representing a surface element is used as wearable data. FIG. 5 is a flowchart illustrating an operation example of the information processing apparatus when a surface element is used as the wearable data. FIG. 6 is a functional block diagram illustrating a configuration example of the information processing apparatus according to the second embodiment. FIG. 7 is a flowchart illustrating an operation example of the wearing article data calculation unit and the wearing article data determination unit. FIG. 8 is a functional block diagram illustrating a configuration example of the information processing apparatus according to the third embodiment. FIG. 9 is a flowchart illustrating an operation example when the muscle activity determination unit resets the wear data. FIG. 10 is a flowchart illustrating an operation example in the case where the muscle activity determination unit resets the material data of the worn article. FIG. 11 is a diagram illustrating an example of muscle activity information.

  In one embodiment of the invention of the present application, in addition to body time series data and external force data, wear data representing a force generated along with deformation of the body wear is input, and in the musculoskeletal model, In response to the external force indicated by the external force data and the force indicated by the wear data, the mechanical quantity generated by the plurality of muscle elements when the movement indicated by the body time series data is calculated. Then, a value indicating the function of the muscle element contributing to the generation of the mechanical quantity is calculated. Thereby, in addition to body movement information and external force, the force of the deformation | transformation of a wearing thing can be taken into consideration and the function of the muscular element which contributes to an exercise | movement can be calculated | required. Therefore, it becomes possible to calculate the muscle activity in consideration of the influence by the wear.

  In the information processing apparatus, using body shape data indicating the shape of the body, wear shape data indicating the shape of the wear, material data indicating the material characteristics of the wear, and body time series data indicating the movement of the body Deformation of the wearing object when the body moves as indicated by the body time system data in a state where the wearing object indicated by the wearing object shape data is attached to the body shape indicated by the body shape data It is possible to further include a wear data calculation unit for calculating the force generated along with the wear.

  The force generated in the wear that deforms in accordance with the movement of the body is calculated from the wear shape data and the material data by the wear data calculation unit. Therefore, the wear data input by the wear data input unit can be generated.

  In the information processing apparatus, the wear data is represented by a line element connecting a start point and an end point, and includes information indicating a relationship between expansion and contraction in the line direction of the line element and force, and the mechanical information calculation unit includes the line element. And determining the positional relationship between the start point and the end point of the line element and the bone element, and based on the information indicating the relationship between the positional relation and the linear expansion and contraction of the line element and the force of the line element, It can be set as the structure which calculates expansion / contraction and the force which generate | occur | produces by the said expansion / contraction.

  With the above-described configuration, it is possible to calculate the function of the muscular element in consideration of the influence of the wearing object while expressing the wearing object with a simple element in the musculoskeletal model and suppressing an increase in calculation load.

  In the information processing device, the wearable data is represented by a surface element, and includes information indicating a relationship between the deformation of the surface element and a force generated in the surface element, and the mechanical information calculation unit includes the physical time It is possible to calculate the deformation of the surface element when the bone element performs the movement indicated by the series data and calculate the force generated by the deformation of the surface element using the wearable data.

  With the configuration described above, the wearing object is represented by a surface element and used in the musculoskeletal model, whereby the movement of the wearing object can be reproduced in more detail, and calculation with higher accuracy becomes possible.

  In the information processing apparatus, based on the calculation result of the force generated along with the deformation of the wearing article by the wearing article data calculating unit, the material data indicating the material characteristics of the wearing article is reset, and the wearing article data It can be set as the structure further provided with the clothing data determination part which makes a calculation part perform recalculation.

  By the said structure, the information which shows the material characteristic of the wearable object in which the force generate | occur | produced with a deformation | transformation of a wearable object becomes a desired value or an optimal value can be obtained.

  In the information processing apparatus, a configuration further includes a muscle activity determination unit that resets the wear data based on a calculation result of the muscle activity calculation unit and causes the mechanical information calculation unit and the muscle activity calculation unit to perform processing. can do.

  By the said structure, the information which shows the force accompanying the deformation | transformation of the wear which makes the function of each muscle element the desired value or the optimal value can be obtained.

  In the information processing apparatus, the material data indicating the material characteristics of the wearing object is reset based on the calculation result of the muscle activity calculating unit, and the wearing data calculating unit, the mechanical information calculating unit, and the muscle activity calculating unit are reset. It can be set as the structure further provided with the muscle activity determination part which makes a process perform.

  By the said structure, the information which shows the material characteristic of the wear which makes the function of each muscle element the desired value or the optimal value can be obtained.

  The information processing apparatus can output the muscle activity information calculated by inputting different wear data in a comparable format.

  By the said structure, the information which shows how a muscular activity changes with the difference in a wearable thing can be output.

  An information processing method executed by the information processing apparatus (computer) having the above configuration, a program for causing a computer to function as the information processing apparatus, or a non-transitory recording media recording such a program Are included in the embodiments of the present invention.

(Embodiment 1)
FIG. 1 is a functional block diagram illustrating a configuration example of the information processing apparatus 1 according to the first embodiment. The information processing apparatus 1 shown in FIG. 1 inputs wear data, body time series data, and external force data, and the body with the wear receives external force and is shown as body time series data using a musculoskeletal model. The mechanical quantity generated by the exercise when it moves is calculated, and the muscle activity information indicating the function of the muscle that contributes to the exercise is generated and output from this mechanical quantity. Therefore, the information processing apparatus 1 includes a wear data input unit 2, a body movement information input unit 3, an external force input unit 4, a mechanical information calculation unit 5, and a muscle activity calculation unit 6.

  The body motion information input unit 3 inputs body time-series data indicating body movement. The body time series data is data representing body motion, and includes, for example, data representing absolute body motion and data representing joint angle motion. Specifically, the body time-series data can include at least one joint center displacement vector designated at the body and an angular displacement vector at the joint center.

  The external force input unit 4 inputs external force data indicating external force acting on the body. The external force data can be, for example, data representing a force received from an external body in contact with the body in addition to gravity. For example, the force received by the foot from the ground when walking, running or standing, the force received from a fluid in contact with the body such as air or water, and the like can be input as the external force. For example, it is possible to divide the body into a plurality of parts and input external force data indicating the external force acting on each divided part.

  The wearing article data input unit 2 inputs wearing article data indicating the force generated with the deformation of the body wearing article. The force generated along with the deformation of the wear includes load, moment, tension, stress, frictional force, and the like. The wear data may be data indicating a relationship between the displacement of the wear and the force generated by the displacement, for example.

  In addition, the form of the input process by the wearing article data input unit 2, the body movement information input unit 3, and the external force input unit 4 is not limited to a specific one. For example, data may be received from a user via an input device, a file in which information is recorded may be read, or data may be received by wireless or wired communication. These input units may be made accessible by the mechanical information calculation unit 5 and the muscle activity calculation unit 6 by recording the input data, for example, in the memory of the information processing apparatus 1.

  The mechanical information calculation unit 5 uses a musculoskeletal model including a plurality of bone elements and a plurality of muscle elements, and the plurality of bone elements receive an external force indicated by the external force data and a force indicated by the wear data. The mechanical quantity generated by the plurality of muscle elements when the movement indicated by the body time series data is calculated. A musculoskeletal model is a plurality of bone element data indicating a plurality of bones connected to each other through joints, and a plurality of muscles representing a plurality of muscles exerting a force between the plurality of bones by expanding and contracting. Contains muscle element data. As the mechanical quantity, for example, the rotational angular velocity, joint torque, joint power, and the like at each joint are calculated as the mechanical quantity.

  The bone element may be data representing a rigid link having a mass, for example. As an example, data representing the position of the joint center between the bone elements, the connection relationship between the bone elements, the mass, shape, moment of inertia, etc. of each bone element is included in the data of the bone elements. The muscle element may be data representing a wire that generates tension when contracted. For example, data representing the positional relationship (start point, end point, and via point) of the wire with respect to the bone element, data representing the tension generated along with expansion and contraction, and the like are included in the muscle element data. The musculoskeletal model may further include a ligament element that connects the bone elements and the bone elements and suppresses relative movement between the bone elements, and a tendon element that connects the bone elements and the muscle elements. . The ligament element and the tendon element can be data representing a wire that passively generates tension.

  For example, the mechanical information calculation unit 5 calculates the mechanical quantity generated in the motion of the bone element by inverse dynamics calculation based on the position change of the bone element when the body performs the movement indicated by the body time series data and the external force. Can be calculated. However, this mechanical quantity includes the influence of deformation of the worn article in addition to the force of the muscle element. For this reason, the mechanical information calculation unit 5 uses the mechanical quantity calculated by the inverse dynamics calculation from the position change of the bone element and the mechanical quantity based on the force generated by the deformation of the wearing object, and by the action of the muscle element. The generated mechanical quantity can be calculated.

  This mechanical quantity is kinematic information, and can be, for example, a value indicating the load of the muscle element when the bone element moves. As an example, if it is considered that the position of the bone element has changed (exercised) due to the resultant force of the external force, the force due to the wear, and the force due to the muscle element, the resultant force can be calculated from the change in the position of the bone element. it can. If the exercise is the same with and without wearing, the external force other than the force due to the wear is the same, so the force exerted by the muscles with and without the force due to the wear Will be different. Therefore, a component obtained by removing the force component due to the wear from the resultant force obtained by the inverse dynamics calculation from the change in the position of the bone element can be used as the force component due to the muscle element. Therefore, it is possible to calculate the mechanical amount of the force due to the action of the muscle element by calculating the mechanical amount of the resultant force by inverse dynamics calculation from the motion of the bone element and excluding the component of the wear from the calculated mechanical amount of the resultant force. it can. The calculation method of the mechanical quantity is not limited to this example. You may calculate in consideration of forces other than the force by a muscle element (for example, the force of a ligament etc.) other than the external force and the force of a wearing thing. Further, in some cases, the dynamic quantity can be calculated by inverse dynamics calculation not only from the position change of the bone element but also from the speed change.

  In this way, the mechanical information calculation unit 5 can calculate the kinematic information considering the influence of the wearing object in addition to the body movement information and the external force in addition to the force generated by the wearing object. become.

  The muscle activity calculation unit 6 calculates a value indicating the function of each muscle element that contributes to the generation of the mechanical quantity calculated by the mechanical information calculation unit 5. This value is a value representing the action of the muscle element on the movement of the body, and can be, for example, muscle tension, muscle contraction speed, muscle power, or the like. When there are a plurality of muscle elements that contribute to the operation of one bone element, the muscle activity calculation unit 6 calculates a plurality of patterns of combinations of values representing the functions of the plurality of muscle elements, for example, and calculates a plurality of patterns based on a predetermined criterion. The optimum pattern can be determined from the inside. In other words, the degree of activity of each muscle element that contributes to the generation of the mechanical quantity can be determined by the optimization calculation.

  Since the joint torque used by the muscle activity calculation unit 6 already reflects the influence of the worn article, the value indicating the function of the obtained muscle element is also influenced by the worn article.

  The functions of the wear data input unit 2, the body movement information input unit 3, the external force input unit 4, the mechanical information calculation unit 5 and the muscle activity calculation unit 6 of the information processing apparatus 1 are executed by a computer processor executing a predetermined program. This can be realized. Further, the information processing apparatus 1 is not necessarily configured by a single computer, and may be realized by, for example, a plurality of computers that can communicate with each other.

[Operation example]
FIG. 2 is a flowchart illustrating an operation example of the information processing apparatus 1. Here, as an example, a description will be given of a process of calculating muscle activity in an operation in which a wearing item is a swimsuit and a body wearing the swimsuit swims.

  In the example shown in FIG. 2, first, the body movement information input unit 3 inputs body time series data (S1). As the body time series data, for example, absolute body motion and joint angle motion data are input. As the absolute body motion, for example, a displacement vector in the absolute motion coordinate system of the joint center specified in the musculoskeletal model is input. As the joint angular motion data, for example, an angular displacement vector at each joint center of the musculoskeletal model is input.

  The wearing article data input unit 2 inputs wearing article data (S2). As the wear data, for example, data indicating the relationship between the tension applied to the wear and the degree of deformation can be input. The wear data includes, for example, an elastic coefficient, an ss curve (load-elongation rate curve), a function indicating the relationship between tension and displacement, or a displacement value associated with each of a plurality of tension values. can do. Further, the wear data can include data indicating the positional relationship between the wear and the bone element. For example, when the wearable is represented by a line element, the start point, the end point, and the waypoint of the line element can be specified by the points fixed to the bone element.

  The external force input unit 4 inputs external force data (S3). The external force data can be, for example, data indicating a fluid force acting on each minute region by dividing a body surface including a bone element into a plurality of minute regions. When the external force changes with time due to the movement of the body, such as fluid force, the external force can also be used as time series data in accordance with the body time series data. The fluid force includes, for example, body shape data (bone element shape, density, etc.) and motion states (position, velocity, acceleration, direction, angular velocity, angular acceleration) acquired from body absolute motion and joint angular motion. May be used to calculate.

  In S1 to S3, the body time series data, the wear data, and the external force data are set in the musculoskeletal model. Here, an example of a part of the musculoskeletal model will be described with reference to FIG. The musculoskeletal model shown in FIG. 3 is a bone element B1, B2, B3 which is a rigid link, joints K12, K23 between the bone elements, and a muscle element M1 which is a wire element connecting points fixed to the bone element. , M2. For example, the bone element B1 and the bone element B2 are connected by a joint K12. The bone elements B1 and B2 are set to be rotatable around the joint K12.

  Furthermore, line elements T1, T2, and T3 that connect a plurality of points set in the musculoskeletal model are set as elements representing the wear item. For example, the positional relationship between the bone element and the line elements T1 to T3 is determined by assigning the start point, the end point, and the waypoint of each of the line elements T1 to T3 to any of predetermined points in the musculoskeletal model. can do. Thus, by making the wearable object data into data representing line elements, the data structure can be simplified, and the calculation load on the mechanical information calculation unit 5 can be reduced.

  As an example, in the example shown in FIG. 3, the line elements T2 and T3 that extend linearly in a direction along the bone element across at least one joint, and the bone from the inside of the crotch to the outside of the knee, A line element T1 extending in a direction inclined with respect to the element is set as the wear data. The line element T1 can be set so as to be along a part formed of a material different in characteristics from the other parts in the wear, such as a joint of seam, a seam, or a doubled part. . Thus, the force by deformation | transformation of a wearable object can be reproduced more correctly by setting combining the line element along a bone element, and the line element according to the structure of the wearable object. In addition, FIG. 3 is a figure at the time of seeing a human musculoskeletal from the back side. FIG. 3 shows a part of the musculoskeletal model, but the whole body can be modeled without being limited to a part of the body.

  As an example, in the body time series data, a vector representing the displacement of the joints K12 and K23 can represent the body absolute motion, and the angular displacement vector of the joints K12 and K23 can represent the joint angular motion. Moreover, about external force data, the force which acts on the minute body segment which divided | segmented the body surface containing bone element B1, B2, B3 can be set as a fluid force. Data indicating the rate of increase in force due to the elongation of the line elements T1, T2, and T3 can be set as the wear data. Moreover, in each line element T1, T2, and T3, the length at the time of relaxation is also set, and when the line elements T1, T2, and T3 extend beyond the length at the time of relaxation, they are set so as to exert a force in the compression direction. You can also.

  Using the musculoskeletal model, the mechanical information calculation unit 5 receives the external force indicated by the external force data input at S3 and the force indicated by the wear data input at S2, using the musculoskeletal model. The mechanical quantity such as the joint torque generated when the movement indicated by the body time-series data input in step S4 is calculated (S4). For example, the mechanical information calculation unit 5 calculates the change in length of each of the line elements T1 to T3 accompanying the change in position of the bone element, and the wear data obtained by inputting the force generated by the change in length in S2. Calculate based on Further, the mechanical information calculation unit 5 calculates the moment from the product of the force generated when the wearable object is deformed by the body movement and the distance to the joint center. By adding this moment to the joint torque obtained by the inverse dynamics calculation based on the position change of the bone element, the joint torque actually exerted by the muscle group can be obtained.

  For example, when the force of the muscle element works in the same direction as the force due to the deformation of the wear, the value obtained by subtracting the magnitude of the moment from the magnitude of the joint torque obtained by the inverse dynamics calculation from the position change of the bone element is This is the magnitude of the joint torque exerted by the muscle element. On the other hand, when the force of the muscle element works in the opposite direction to the force due to the deformation of the wear, the value obtained by adding the magnitude of the moment to the magnitude of the joint torque obtained by the inverse dynamics calculation from the position change of the bone element Is the magnitude of the joint torque exerted by the muscle element.

  The muscle activity calculation unit 6 calculates a value indicating the function of each muscle element contributing to the generation of the mechanical quantity calculated in S4 (S5). It can be considered that the human body generates actual torque by generating joint torque as the muscle contracts. Therefore, the muscle tension can be estimated by calculating the joint torque and dividing by the moment arm length. However, in many cases, there are multiple muscles that cause some joint movement. Therefore, the muscle activity calculation unit 6 can distribute the joint torque to each muscle that contributes to the joint motion, for example, by an optimization calculation that maximizes or minimizes a certain objective function. As an objective function, for example, calculate the sum of exponential power of muscle stress (muscle tension divided by muscle cross-sectional area) or muscle activity (corresponding to the frequency of firing pulses of myoelectric potential) for each muscle. Optimization calculations can be performed to minimize.

  In S5, for example, values such as muscle tension, muscle contraction speed, and muscle power are calculated, and these values are output as information indicating muscle activity. For example, in addition to the values of muscle tension, muscle contraction speed, or muscle power of each muscle, an average value, a sum, etc. of these may be output, and animations and images expressing muscle activity are generated based on these values. It may be output.

  By the process shown in FIG. 2, the muscle activity when exercising with wearing clothes can be calculated. Such a calculation can contribute to the design of a wearable item such as a swimsuit that is in close contact with the body and easily affects muscle activity. The process illustrated in FIG. 2 is an example, and the operation of the information processing apparatus is not limited to this. For example, the processing order of S1 to S3 can be arbitrarily changed.

[Modification of operation]
FIG. 4 is a diagram illustrating an example in which data representing a surface element is used as wearable data. In the example shown in FIG. 4, a wearable item is represented by a plurality of surface elements S provided around the bone element B. Here, the bone element B and the muscle element (not shown in FIG. 4) can be the same as in FIG. The surface element can be represented by, for example, the coordinates of the vertices of each surface. Some of the vertices of the plurality of surface elements may be fixed to points predetermined in the musculoskeletal model. Thereby, the positional relationship between the bone element and the surface element representing the wearable item can be determined.

  Also, the wearable data can include information indicating the relationship between the deformation of the surface element and the force generated in the surface element. For example, information indicating the relationship between expansion and contraction in the direction along the surface of the surface element can be included. Furthermore, in one surface element, information indicating the relationship between expansion and contraction and force in a plurality of directions can be included. Thereby, the anisotropy of the mechanical characteristic of the material of a wearable object can be reflected in the surface element of wearable object data. The information indicating the relationship between the deformation of the surface element and the force generated in the surface element may be, for example, a function representing the relationship between the deformation and the force in addition to the elastic coefficient or the ss curve, or the degree of deformation. It may be a table format or table format data indicating the correspondence between the value indicating the force and the force value.

  FIG. 5 is a flowchart illustrating an operation example of the information processing apparatus 1 when data representing a surface element is used as the wearable data. In FIG. 5, S1 and S3 can be executed in the same manner as S1 and S3 in FIG. In S2, data representing a plurality of surface elements as described above is input as the wearable data.

  The mechanical information calculation unit 5 calculates the deformation of each surface element due to the movement indicated by the body time-series data input in S1 (S11). For example, a transformation matrix for converting the three-dimensional coordinates before deformation of the vertices constituting the surface element into the three-dimensional coordinates of the vertices after deformation can be obtained using the least square method. An example of calculation of such a transformation matrix is described in Patent Document 3, for example. The calculation of the deformation of the surface element is not limited to this. For example, the deformation of the surface element can be calculated by calculating the change in the area of each surface element or the degree of expansion / contraction in a predetermined direction.

  Based on the deformation of the surface element calculated in S11, the mechanical information calculation unit 5 calculates the force generated by this deformation using the wearing data input in S2 (S12). For example, the tension generated on the surface can be calculated from the deformation amount of the surface. Alternatively, when the wear data includes information indicating the relationship between expansion and contraction in a plurality of directions in each surface element, the force in each of the plurality of directions is determined based on the deformation amount and the deformation direction of the surface. Can be calculated.

  The mechanical information calculation unit 5 obtains a moment due to the force generated in the surface element calculated in S12 (S13). For example, the moment can be obtained from the product of the distance from the surface element to the related joint center and the force obtained in S12. Here, the relationship between the surface element and the joint center can be set in advance, or a joint center having a predetermined positional relationship with the surface element (for example, the joint center at the nearest or constant distance) ) Can also be the relevant joint center.

  The mechanical information calculation unit 5 adds the moment of each surface element obtained in S13 to the joint torque exhibited by the motion of the bone element indicated by the body time series data (S14). For example, the mechanical information calculation unit 5 may calculate joint torque by inverse dynamics calculation based on the position change of the bone element due to movement indicated by the body time series data, and add the moment obtained in S13 to the joint torque. it can. Thereby, the component by the effect | action of the force which a muscle element exhibits among the joint torque generate | occur | produced by the motion of a bone element can be calculated | required.

  The muscle activity calculation unit 6 calculates a value indicating the function of each muscle element contributing to the generation of the mechanical quantity calculated in S14 (S5). Thereby, it is possible to calculate a value indicating the muscle activity of each muscle element in consideration of the influence of force due to the deformation of the surface element. Moreover, since the influence of the force for every surface element is reflected, the more detailed structure or characteristic of a wearable thing can be reflected in a calculation result.

(Embodiment 2)
FIG. 6 is a functional block diagram illustrating a configuration example of the information processing apparatus 1a according to the second embodiment. The information processing apparatus 1a illustrated in FIG. 6 further includes a wearable object data calculation unit 7 and a wearable object data determination unit 8 in addition to the configuration illustrated in FIG.

  The wearable object data calculation unit 7 includes body shape data indicating the shape of the body, wearable object shape data indicating the shape of the wearable object, material data indicating the material characteristics of the wearable object, and body time series data indicating the movement of the body. Enter. The wearing data calculation unit 7 uses these input data, and the body is body time system data in a state in which the wearing object indicated by the wearing object shape data is attached to the body shape indicated by the body shape data. Calculate the force generated with the deformation of the wear when the indicated movement is made. The data relating to the force associated with the deformation of the wear calculated by the wear data calculation unit 7 is input by the wear data input unit 2 as the wear data.

  For example, the wearing article data calculation unit 7 generates data representing the shape of the wearing article in a state where the wearing article is worn on the body based on the body surface shape indicated by the body shape data. The shape data of the wearable object can include, for example, a plurality of elements associated with the body surface shape, and the deformation of each element caused by the movement indicated by the body time series data is calculated. The force generated by the deformation of each element can be calculated based on the calculated deformation of each element and the material characteristics of the wearing material indicated by the material data.

  The wearing article data determination unit 8 resets the material data indicating the material characteristics of the wearing article based on the calculation result of the force generated by the wearing article data calculation unit 7 along with the deformation of the wearing article. The calculation unit 7 is caused to perform recalculation. Note that the wearable object data determination unit 8 may be omitted, and the data calculated by the wearable object data calculation unit 7 may be input by the wearable object data input unit 2.

[Operation example]
FIG. 7 is a flowchart showing an example of the operation of the wearing article data calculation unit 7 and the wearing article data determination unit 8. Here, as an example, a description will be given of a process of calculating a force generated along with a deformation of a swimsuit when the wearing item is a swimsuit and the body wearing the swimsuit moves.

  In the example shown in FIG. 7, first, the wearing article data calculation unit 7 inputs body shape data (S21). The body shape data can be used as basic data for generating clothing shape data, and can be input as polygon data, for example. Polygon data is data that decomposes the surface of a modeled three-dimensional figure into a plurality of polygons such as triangles and quadrilaterals and forms a three-dimensional figure using these polygons as processing units in three-dimensional graphics. Body shape data can be configured as a three-dimensional model, and polygon data can be arranged on the surface of the three-dimensional model. For example, it can be generated based on data represented as a set of three-dimensional coordinates obtained by a body shape measuring instrument using ultrasonic waves or laser.

  The wearing article data calculation unit 7 inputs initial wearing article shape data (S22). The initial wearing object shape data can be, for example, data representing the shape of the wearing object before wearing. Here, the shape data of a wearable item such as clothes can include a data element that can be treated as a wearable item for calculation. As such a data element, for example, a string-like line element or a surface element may be used as long as a constituent element as a wearing item is satisfied at a minimum. In the case of a line element, the load at the time of calculation of the wearing data calculator 7 can be reduced. The surface element can be, for example, polygon data that approximates the shape of the actual wearing article. Since the shape data of the wearing object includes the surface element, calculation closer to reality can be performed.

  The wearing article data calculation unit 7 generates shape data of the wearing object to be designed based on the body shape data input in S21 and the initial clothing shape data input in S22 (S23). In the case where the shape data of the wearable object is a linear element, it is possible to specify by a three-dimensional coordinate which path the element passes through on the surface of the body shape polygon data. When the shape data is polygon data, it is assumed that the vertexes constituting each polygon are in contact with or correspond to the vertexes constituting the body shape polygon data in three-dimensional coordinates. it can.

  The wearing article data calculation unit 7 inputs body movement information indicating the movement of the body shape as body time series data (S24). The body motion information may be related to various body movements. In the present embodiment, as an example, a displacement vector of at least one joint center in the body and an angular displacement vector at each joint center are considered. For example, the data input in S24 can use the same data as the body time-series data input in the body motion information input unit 3, but it is not necessarily the same.

  The wearing article data calculation unit 7 calculates the displacement of the polygon data based on the polygon data representing the shape of the wearing article calculated in S23 and the body time-series data indicating the body motion input in S24 (S25). . Thereby, the deformation | transformation of a wearing thing is computable. For example, a transformation matrix for converting the three-dimensional coordinates before deformation of the vertices constituting the surface element into the three-dimensional coordinates of the vertices after deformation can be obtained using the least square method (see, for example, Patent Document 3 above). ). The calculation of the deformation of the surface element is not limited to this.

  The wearing article data calculation unit 7 inputs material data indicating the material characteristics of the wearing article (S26). The material data is data including mechanical information of the material of the wearable material, and is used, for example, to calculate a force (for example, tension) generated in the wearable element represented by the polygon from the displacement of the polygon data. It is done. For example, the elastic modulus of the wearing object, that is, the force required to stretch the cloth of the wearing object for a certain length can be used as the material data. In addition, in order to consider the anisotropy of the fabric, the following formula is given as a model formula, and the parameters of the model formula are calculated using the least square method from the results of the fabric tensile test performed at different angles. It can also be material data. Here, the elastic potential function that determines the characteristics of the anisotropic hyperelastic model to be given includes a Mooney Riblin model (see, for example, the following document (1)) representing an isotropic characteristic and a modified Itzukov model (for example, the characteristic of anisotropy) (for example, , See the following document (2)).

Reference (1) RS Rivlin and DW Saunders, "Large elastic deformation of isotropic materials. VII. Experiments on the deformation of rubber", Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 243, Issue 865 , pp. 251-288.
(2) Mitsuteru Asai, Yoshiyuki Kimura, Yoshihiro Sonoda, Yasushi Nishimoto, Yoshio Nishino, "Numerical Solution of Woven Fabric Reinforced Rubber Properties Using Anisotropic Hyperelastic Model", Applied Mechanics, Vol.11 (2008), pp. 467-474

  The wearing article data calculation unit 7 calculates a value indicating the force generated by the displacement based on the displacement of the polygon data calculated in S25 and the material data input in S26 (S27). The wearable object data calculation unit 7 can calculate the magnitude and direction distribution of tension or moment generated by the polygon, for example, by calculating the force accompanying the displacement of each polygon data. Such information can be output as design support information.

  The wearing article data determination unit 8 evaluates information based on the force caused by the deformation of the wearing article calculated in S27 (S28). For example, the wearing article data determination unit 8 can display the calculation result of S27 on a display unit such as a display and accept an input of evaluation from the user. For example, the wear data determination unit 8 displays the distribution of force or moment due to deformation of the wear, and updates the information indicating whether the design of the wear suits the original purpose or the material data of the wear from the user. Input of information can be accepted. As described above, the wearing article data determination unit 8 can determine whether or not the wearing article is suitable for the purpose based on the input from the user. Or the wearing article data determination part 8 can determine automatically using the value which shows the force calculated by S27, or the evaluation value obtained from a value.

  When it is determined that the desired result is not obtained in S28 (NO in S28), the wearing article data determination unit 8 updates the material data based on the input from the user or the calculation result of S27 (S26). Then, the wearing data calculation unit 7 is caused to execute the process of S27 again. The material data can be updated based on an input from the user, or can be automatically updated. In the case of automatically updating, for example, the value indicating the material property within a predetermined range is randomly changed, or the updated value can be determined using a predetermined evaluation function. If YES is determined in S28, the calculation result in S27 is output. Thereby, for example, the operation of changing the information input in S26, calculating and displaying the design support information again, and determining whether or not it meets the purpose can be repeated until a desired tension is obtained.

(Embodiment 3)
FIG. 8 is a functional block diagram illustrating a configuration example of the information processing apparatus 1b according to the third embodiment. The information processing apparatus 1b illustrated in FIG. 8 further includes a muscle activity determination unit 9 in addition to the configuration illustrated in FIG. The muscle activity determination unit 9 resets the wear data based on the calculation result of the muscle activity calculation unit 6 and causes the mechanical information calculation unit 5 and the muscle activity calculation unit 6 to execute processing. In addition to or instead of this configuration, the muscle activity determination unit 9 resets the material data indicating the material characteristics of the wear based on the calculation result of the muscle activity calculation unit 6, and the wear data calculation unit 7. It can also be set as the structure which makes the mechanical information calculation part 5 and the muscular activity calculation part 6 perform a process.

  FIG. 9 is a flowchart illustrating an operation example when the muscle activity determination unit 9 resets the wear data based on the calculation result of the muscle activity calculation unit 6. In FIG. 9, S1 to S5 can be executed in the same manner as S1 to S5 shown in FIG. In S6, the muscle activity determination unit 9 determines whether or not the muscle activity obtained in S4 is suitable for the initial purpose. For example, when it is determined that the desired muscle tension, muscle contraction speed, or muscle power is not obtained by the input from the user or the evaluation of the value indicating the muscle activity, the information input in S2 is changed again. The processes of S4 and S5 can be repeated. Thereby, it is possible to repeat the process of determining whether the muscle activity is suitable for the purpose (S6) until a desired muscle tension, muscle contraction speed, and muscle power are obtained. As a result, wear data for achieving a desired muscle activity is obtained.

  FIG. 10 is a flowchart illustrating an operation example in the case where the muscle activity determination unit 9 resets the material data of the wearing article based on the calculation result of the muscle activity calculation unit 6. 10, S21 to S27 can be executed in the same manner as S21 to S27 shown in FIG. 7, and S1 to S5 can be executed in the same manner as S1 to S5 shown in FIG. In S6, the muscle activity determination unit 9 determines whether or not the muscle activity obtained in S4 is suitable for the initial purpose. If it is determined that the muscle activity does not meet the original purpose, the material data input to S26 can be changed and the processes of S27 and S1 to S5 can be repeated again. As a result, material data of the wear to achieve the desired muscle activity is obtained.

  For example, determination criterion data indicating muscles and muscle movements to be supported is set in advance, and in S6, the muscle activity determination unit 9 sets a condition in which the function of the muscle element obtained in S5 is indicated by the determination criterion data. It can be determined whether or not the condition is satisfied. Alternatively, the muscle activity determination unit 9 may input muscle activity information calculated by inputting different wear data in a comparable format, and may accept input of information indicating evaluation from the user.

  FIG. 11 is a diagram illustrating an example of muscle activity information obtained in S5. As shown in FIG. 11, the results of calculating representative values (for example, average value, total value, median value, etc.) of muscle tension of muscle groups that contribute to a specific action while changing the conditions of the wear data are compared. It can be displayed in a possible form. Thereby, it becomes easy for the user to determine whether the desired muscle activity can be obtained by setting what kind of wearing condition. In the example shown in FIG. 11, the calculation result is shown for muscles of a part of the body, but the calculation result can also be shown for muscles of the whole body. In addition, for example, information for identifying which muscle has an influence of a wearing item can be displayed.

  The information processing apparatuses described in the first to third embodiments can be suitably used for obtaining, for example, design support information for wearing articles suitable for supporting a specific exercise using muscles. In addition, this invention is not limited to the said Embodiment 1-3. For example, the wearable items that can be handled in the present invention are not limited to swimwear, but can be applied to other items that are attached to the body and affect the movement of the body. For example, the present invention can be suitably used for the design of a wearable item having a function of supporting the movement of a person or an animal, such as running wear or shoes that support running motion, golf wear that supports golf swing motion, etc. .

DESCRIPTION OF SYMBOLS 1, 1a, 1b Information processing apparatus 2 Wearing thing data input part 3 Physical motion information input part 4 External force input part 5 Mechanical information calculation part 6 Muscle activity calculation part 7 Wearing object data calculation part 8 Wearing object data determination part 9 Muscle activity Judgment part

Claims (10)

A body movement information input unit for inputting body time-series data indicating body movement;
An external force input unit for inputting external force data indicating the external force acting on the body;
A wear data input unit for inputting wear data represented by surface elements indicating tensions in a plurality of directions generated along with deformation of the wear of the body;
A musculoskeletal structure including a plurality of bone elements indicating a plurality of bones rotatably connected to each other via joints, and a plurality of muscle elements representing a plurality of muscles that exert force between the plurality of bones by expanding and contracting Using the model, when the plurality of bone elements receive the external force indicated by the external force data and the force indicated by the wear data, and move by the body time series data, the plurality of muscle elements A mechanical information calculation unit for calculating a mechanical quantity generated by
E Bei muscle activity calculation section that calculates a value indicating a respective work contributes the muscle element to generation of a physical quantity calculated by the dynamic information calculation unit,
The wearing article data includes information indicating a relationship between deformation of the surface element and tension in a plurality of directions generated in the surface element,
The mechanical information calculation unit calculates a deformation of the surface element when the bone element performs a movement indicated by the body time-series data, and generates a force generated by the deformation of the surface element using the wearable data. An information processing apparatus for calculating .   Using the body shape data indicating the shape of the body, the wear shape data indicating the shape of the wear object, the material data indicating the material characteristics of the wear object, and the body time series data indicating the movement of the body, the body shape data Occurs when the body moves as indicated by the body time system data in a state in which the wear indicated by the wear shape data is attached to the shape of the body indicated by The information processing apparatus according to claim 1, further comprising a wearable data calculation unit that calculates force. The mechanical information calculation unit calculates moments of all the surface elements from a product of a tension generated along with the deformation of the surface element and a distance from the surface element to the joint center, and calculates all the surface elements. The information processing apparatus according to claim 1, wherein the mechanical quantity is calculated using a value obtained by integrating moments. The mechanical information calculation unit obtains a joint torque by inverse dynamics calculation in consideration of the external force, and calculates the mechanical quantity by adding all the moments of the integrated surface elements to the joint torque. Item 4. The information processing device according to Item 3.   Based on the calculation result of the force generated along with the deformation of the wearing article by the wearing article data calculating unit, the material data indicating the material characteristics of the wearing article is reset, and recalculated in the wearing article data calculating unit. The information processing apparatus according to claim 2, further comprising a wearing data determination unit that executes the operation.   The muscle activity determination unit according to claim 1, further comprising a muscle activity determination unit that resets the wearable data based on a calculation result of the muscle activity calculation unit and causes the mechanical information calculation unit and the muscle activity calculation unit to execute processing. The information processing apparatus according to any one of claims.   Based on the calculation result of the muscle activity calculation unit, the material data indicating the material characteristics of the worn article is reset, and the wear item data calculation unit, the mechanical information calculation unit, and the muscle activity calculation unit are caused to execute processing. The information processing apparatus according to claim 2, further comprising a muscle activity determination unit.   The information processing apparatus according to claim 1, wherein the muscle activity information calculated by inputting different wear data is output in a comparable format. An information processing method executed by a computer,
A body movement information input step for inputting body time-series data indicating body movement;
An external force input process for inputting external force data indicating the external force acting on the body;
A wear data input process for inputting wear data represented by surface elements indicating tensions in a plurality of directions generated along with deformation of the wear of the body;
A musculoskeletal structure including a plurality of bone elements indicating a plurality of bones rotatably connected to each other via joints, and a plurality of muscle elements representing a plurality of muscles that exert force between the plurality of bones by expanding and contracting Using the model, when the plurality of bone elements receive the external force indicated by the external force data and the force indicated by the wear data, and move by the body time series data, the plurality of muscle elements A mechanical information calculation step for calculating a mechanical quantity generated by
Have a muscle activity calculation step that calculates a value indicating a respective work contributes the muscle element to generation of a physical quantity calculated by the dynamic information calculating step,
The wearing article data includes information indicating a relationship between deformation of the surface element and tension in a plurality of directions generated in the surface element,
In the mechanical information calculation step, the deformation of the surface element when the bone element performs the movement indicated by the body time series data is calculated, and the force generated by the deformation of the surface element using the wearable data is calculated. Information processing method to calculate . Body movement information input processing for inputting body time-series data indicating body movement;
An external force input process for inputting external force data indicating the external force acting on the body;
Wear data input processing for inputting wear data represented by surface elements indicating tensions in a plurality of directions generated along with deformation of the wear of the body;
A musculoskeletal structure including a plurality of bone elements indicating a plurality of bones rotatably connected to each other via joints, and a plurality of muscle elements representing a plurality of muscles that exert force between the plurality of bones by expanding and contracting Using the model, when the plurality of bone elements receive the external force indicated by the external force data and the force indicated by the wear data, and move by the body time series data, the plurality of muscle elements Mechanical information calculation processing for calculating the mechanical quantity generated by
Causing the computer to execute a muscle activity calculation process for calculating a value indicating the function of each of the muscle elements that contributes to the generation of the mechanical quantity calculated in the mechanical information calculation process ,
The wearing article data includes information indicating a relationship between deformation of the surface element and tension in a plurality of directions generated in the surface element,
The mechanical information calculation process calculates a deformation of the surface element when the bone element performs a movement indicated by the body time series data, and uses the wear data to generate a force generated by the deformation of the surface element. An information processing program to calculate .

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