JPWO2014108948A1 - Measuring device, footwear and information processing device - Google Patents

Abstract

A measuring device for evaluating the walking of a subject includes a foot pressure distribution detection sensor unit in which a plurality of pressure sensitive elements are arranged, and a triaxial acceleration sensor unit that detects the movement of the subject's foot in three axial directions. The foot pressure distribution calculation data obtained by the measurement by the foot pressure distribution detection sensor unit, and the triaxial acceleration data obtained by the measurement by the triaxial acceleration sensor. A communication unit that transmits to the outside in association with the elapsed time from the start of measurement by the three-axis acceleration sensor.

Description

  The present invention relates to a measuring device, footwear, and an information processing device for evaluating the walking of a subject.

  In the past, motor function recovery training has been performed under the guidance and monitoring of a physical therapist or the like for a patient who has developed a cranial nervous system disease such as stroke and whose right or left hemiplegia is paralyzed. Generally, in order to live an independent life, recovery of lower limb function is indispensable, and it is important for physical therapists to accurately determine the recovery status of the patient's lower limb function during training. . For this reason, in the exercise training for recovery of motor function, it is desirable to measure the patient's foot pressure distribution or the like and quantitatively evaluate the recovery state of the lower limb function.

  On the other hand, as a system for measuring and visualizing the foot pressure distribution of a subject, conventionally, a sensor part such as a pressure sensitive element is arranged on the insole portion of the shoe to measure the foot pressure distribution during walking of the subject. A system has been proposed (for example, see Patent Documents 1 and 2 below).

JP 2011-234818 A JP 2009-106545 A

  By simply analyzing the foot pressure distribution during walking, the relationship between the foot pressure distribution and the walking behavior of the entire foot is unknown, so it is possible to quantitatively grasp the cause of abnormal foot pressure distribution, for example, bias in foot pressure distribution Difficult to do.

  For this reason, in the exercise training for recovery of motor function, when quantitatively evaluating the recovery state of lower limb function, the foot pressure distribution during walking can be accurately measured, and abnormal foot pressure distribution can be measured. It is desirable to have a configuration that can quantitatively grasp the cause.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an advantageous technique for accurately and quantitatively grasping a subject's walking state.

  One aspect of the present invention relates to a measurement device for evaluating the walking of a subject, and the measurement device includes a foot pressure distribution detection sensor unit including a plurality of pressure-sensitive elements, and the foot of the subject. A three-axis acceleration sensor that detects the movement in the three-axis direction, foot pressure distribution calculation data obtained by measurement by the foot pressure distribution detection sensor, and three axes obtained by measurement by the three-axis acceleration sensor A communication unit that transmits acceleration data in association with an elapsed time from the start of measurement by the foot pressure distribution detection sensor unit and the three-axis acceleration sensor.

  ADVANTAGE OF THE INVENTION According to this invention, the technique advantageous in order to grasp | ascertain the state in which a subject is walking correctly and quantitatively is provided.

It is a figure showing appearance composition of a foot pressure distribution measuring system provided with footwear (rehabilitation shoes) concerning a 1st embodiment of the present invention. It is a figure which shows the external appearance structure and sensor arrangement | positioning of an insole of rehabilitation shoes. It is a figure which shows the external appearance structure and sensor arrangement | positioning of an insole of rehabilitation shoes. It is a figure which shows the function structure of a foot pressure distribution measurement system. It is a figure which shows the displacement of a Z-axis direction at the time of seeing the motion of the leg | foot during a test subject's walk from the side. It is a figure which shows the displacement of a Y-axis direction at the time of seeing the motion of the leg | foot during a test subject's walk from the side. It is a figure which shows the displacement of a X-axis direction at the time of seeing the motion of the leg | foot while a subject walks from the top. It is a flowchart which shows the flow of the walking movement analysis process in a foot pressure distribution measurement system. It is a figure which shows the list of the data list recorded in the foot pressure distribution measurement system. It is a figure which shows an example of the walking movement analysis result displayed in the foot pressure distribution measurement system. It is a figure which shows an example of the walking movement analysis result displayed in the foot pressure distribution measurement system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

[First Embodiment]
<1. Appearance structure of foot pressure distribution measurement system>
FIG. 1 is a diagram illustrating an example of an external configuration of a foot pressure distribution measurement system 100 including rehabilitation shoes (footwear) 110R and 110L according to the first embodiment of the present invention. The rehabilitation shoes (footwear) 110R and 110L incorporate a measuring device for evaluating the walking of the subject. The measurement device includes a foot pressure distribution detection sensor unit, a triaxial acceleration sensor unit, and a communication unit.

  In FIG. 1, 110L and 110R are rehabilitation shoes (footwear) provided with a foot pressure distribution detection sensor unit including an array of a plurality of pressure sensitive elements. The plurality of pressure-sensitive elements can be disposed on the insole of the rehabilitation shoe so that the sole of the subject contacts directly or via a sock, for example. 110L is a rehabilitation shoe for the left foot, and 110R is a rehabilitation shoe for the right foot. In addition, the rehabilitation shoes 110R and 110L are respectively provided with communication units 112R and 112L for performing wireless communication with the information processing apparatus, and triaxial acceleration sensor units 111R and 111L for measuring accelerations in the triaxial directions of the respective feet. It has been. The communication unit 112R, the foot pressure distribution detection sensor unit, and the three-axis acceleration sensor unit 111R can be connected via a cable. Similarly, the communication unit 112L, the foot pressure distribution detection sensor unit, and the three-axis acceleration sensor unit 111L can be connected via a cable. The communication unit 112R and the three-axis acceleration sensor unit 111R can be integrally attached to a band-shaped member that is wound around the subject's ankle. Similarly, the communication unit 112L and the three-axis acceleration sensor unit 111L can be integrally attached to a band-shaped member that is wound around the subject's ankle.

  Reference numeral 120 denotes an information processing device, which includes foot pressure distribution calculation data measured by a foot pressure distribution detection sensor unit (not shown) of the rehabilitation shoe 110L for the left foot and the rehabilitation shoe 110R for the right foot, and a triaxial acceleration sensor unit. The triaxial acceleration data measured by 111R and 111L (that is, data from the measuring device) are acquired. Here, the triaxial acceleration data includes acceleration data in the X axis direction (lateral direction; pitch axis direction), acceleration data in the Y axis direction (traveling direction when the subject walks; roll axis direction), Acceleration data in the Z-axis direction (height direction; yaw axis direction) can be included.

  The information processing device 120 calculates the position coordinates of each foot of the subject while walking and the motion trajectory of each foot of the subject while walking by analyzing the triaxial acceleration data, along with the foot pressure distribution data indicate. The position coordinates can be calculated with reference to the position of each foot of the subject at the start of the walking motion analysis process, for example. By calculating the motion trajectory, the landing position of the foot of the subject who is walking can be determined.

  Details of the walking motion analysis process from acquiring and analyzing the foot pressure distribution calculation data and the triaxial acceleration data to visualizing the walking state of the subject will be described later.

<2. Detailed configuration of rehabilitation shoes>
Next, a detailed configuration of the rehabilitation shoes will be described. 2A and 2B are diagrams for explaining a detailed configuration of the rehabilitation shoes. Here, as an example, a rehabilitation shoe 110R for the right foot is shown. 2A is a side external view, and FIG. 2B is a plan view of the insole.

  As shown in FIG. 2A, a plurality of pressure-sensitive elements 202R are embedded in the midsole of the rehabilitation shoe 110R. In this embodiment, the midsole is a foot pressure for measuring foot pressure distribution detection data. It functions as the distribution detection sensor unit 201R. In the state where the subject wears the rehabilitation shoe 110R, the sole of the subject contacts the inner bottom of the rehabilitation shoe 110R directly or via a sock.

  A power supply unit 203R for supplying power to the pressure sensitive element 202R, the triaxial acceleration sensor unit 111R, and the communication unit 112R is disposed on the sole of the rehabilitation shoe 110R.

  Hereinafter, data measured in each of the plurality of pressure sensitive elements 202R constituting the foot pressure distribution detection sensor unit 201R will be referred to as “foot pressure data”, and a number of foot pressure data groups corresponding to the number of pressure sensitive elements 202R. This is referred to as “foot pressure distribution calculation data”. Further, data for displaying the foot pressure distribution calculated using the foot pressure distribution calculation data will be referred to as “foot pressure distribution data”.

<3. Functional configuration of information processing device constituting load distribution measurement system>
FIG. 3 is a diagram illustrating a functional configuration of the information processing apparatus 120 that configures the foot pressure distribution measurement system 100. As illustrated in FIG. 3, the information processing apparatus 120 includes a control unit (computer) 321, a memory unit 322, a storage unit 323, a display unit 324, an input unit 325, and an external device I / F unit 326. Each part is connected to each other via a bus 327.

  The storage unit 323 configured by a hard disk or the like stores programs that function as a foot pressure distribution calculation unit 331, a walking motion analysis unit 332, and a triaxial motion analysis unit 333, respectively, by being executed by the control unit 321. ing. The program is appropriately read into a memory unit 322 (for example, a RAM) functioning as a work area under the control of the control unit 321, and executed by the control unit 321, thereby realizing each function. Note that data acquired by executing the program by the control unit 321 is recorded in the storage unit 323 as foot pressure distribution calculation data 334 and triaxial acceleration data 335.

  The display unit 324 displays a user interface for causing the control unit 321 to execute the program, or displays a walking motion analysis result. The input unit 325 inputs an instruction for executing the program, and includes a keyboard and a pointing device (such as a mouse). The external device I / F unit 326 is measured by the foot pressure distribution detection sensor units 201L and 201R and transmitted via the communication units 112L and 112R, and the triaxial acceleration sensor units 111L and 111R. This is an I / F (interface) for taking the triaxial acceleration data measured and transmitted via the communication units 112L and 112R into the information processing apparatus 120. In the present embodiment, the external device I / F unit 326 is realized by a wireless interface such as a wireless LAN or Bluetooth. In the case of realizing by wired communication, the external device I / F unit 326 is realized by a wired interface such as USB or IEEE1394, for example.

<4. Description of analysis contents of triaxial acceleration data measured by triaxial acceleration sensor unit>
Next, the analysis content of the triaxial acceleration data measured by the triaxial acceleration sensor units 111L and 111R will be described.

(1) Displacement in Z-axis direction First, displacement in the Z-axis direction (height direction) calculated by analyzing acceleration data in the Z-axis direction will be described. FIG. 4 is a diagram illustrating the displacement in the Z-axis direction when the movement of the right foot while the subject is walking is viewed from the side. As shown in FIG. 4, the right foot that has landed (state 401) starts to walk and moves upward by kicking the ground (state 402), and is positioned substantially parallel to the ground. After moving in the advancing direction while maintaining (states 403 and 404), landing again (state 405).

  At this time, the position in the Z-axis direction of the 3-axis acceleration sensor unit 111R in the state 401 is set as the reference position 410, and the acceleration data in the Z-axis direction measured by the 3-axis acceleration sensor unit 111R is integrated twice, thereby A displacement 412 from the position 410 can be calculated. Similarly, by calculating the displacements 413 and 414 in the states 403 and 404, the displacement in the Z-axis direction at each elapsed time after the start of the walking motion in the walking motion for one step of the right foot can be obtained.

  By detecting the time when the position of the three-axis acceleration sensor unit 111R in the Z-axis direction reaches the reference position 410 again after the start of the walking motion, it can be determined as the landing timing of the first step of the subject's right foot. .

(2) Displacement in Y-axis direction Next, displacement in the Y-axis direction (traveling direction) will be described. FIG. 5 is a diagram illustrating the displacement in the Z-axis direction when the movement of the right foot while the subject is walking is viewed from the side. As shown in FIG. 5, the right foot that has landed (state 401) moves upward in the traveling direction by starting a walking motion and kicking the ground (state 402), and is positioned substantially parallel to the ground. After moving in the advancing direction while maintaining (states 403 and 404), landing again (state 405).

  At this time, the position in the Y-axis direction of the three-axis acceleration sensor unit 111R in the state 401 is set as the reference position 510, and the acceleration data in the Y-axis direction measured by the three-axis acceleration sensor unit 111R is integrated twice, thereby A displacement 512 from the position 510 can be calculated. Similarly, by calculating each displacement 513, 514, 515 in each state 403, 404, the displacement in the Y-axis direction at each elapsed time after the start of the walking motion in the walking motion for one step of the right foot can be obtained. .

(3) Displacement in X-axis direction Next, displacement in the X-axis direction (turning direction) will be described. FIG. 6 is a diagram illustrating displacement in the X-axis direction when the motion of the right foot while the subject is walking is viewed from above. As shown in FIG. 6, the right foot that has landed (state 401) starts walking, moves in the direction of travel by kicking the ground (state 402 to 404), and then landes again (state 405). .

  At this time, depending on the subject, the leg in the swing leg period may be displaced in the X-axis direction (turns outward or inward) with respect to the landing position. Therefore, a line connecting the position in the X-axis direction in the state 401 and the position in the X-axis direction in the state 405 with a straight line is taken as a reference position 610, and acceleration data in the X-axis direction measured by the three-axis acceleration sensor unit 111R. Is integrated twice, and displacements 612 to 614 from the reference position 610 can be calculated. That is, the displacement in the X-axis direction at each elapsed time after the start of the walking motion in the walking motion for one step of the right foot can be obtained.

  Combining the displacement in the Z-axis direction and the displacement in the Y-axis direction at each elapsed time from the start of the walking motion, the movement of the subject's foot while walking is viewed from the side (that is, Y− The trajectory of the displacement (in the Z-axis plane) can be calculated.

  Similarly, by combining the displacement in the X-axis direction and the displacement in the Y-axis direction at each elapsed time from the start of the walking motion, when the motion of the subject's foot during walking is viewed from above (that is, , In the XY axis plane), the displacement trajectory can be calculated.

<5. Explanation of walking motion analysis processing>
Next, walking motion analysis processing in the information processing apparatus 120 will be described. FIG. 7 is a flowchart showing the flow of walking motion analysis processing in the information processing apparatus 120. In step S701, the walking motion analysis unit 332 transmits a measurement start instruction to the rehabilitation shoe 110L for the left foot and the rehabilitation shoe 110R for the right foot. In response to receiving the measurement start instruction from the walking motion analysis unit 332, in the rehabilitation shoe 110L for the left foot and the rehabilitation shoe 110R for the right foot, the foot pressure distribution detection sensor units 201R and 201L include the foot pressure distribution calculation data. Start measurement. In response to receiving a measurement start instruction from the walking motion analysis unit 332, the triaxial acceleration sensor units 111R and 111L start measuring triaxial acceleration data. Further, the rehabilitation shoe 110L for the left foot and the rehabilitation shoe 110R for the right foot transmit the measured foot pressure distribution calculation data and the triaxial acceleration data to the information processing device 120 in association with the elapsed time from the measurement start time. To start.

  In step S702, the walking motion analysis unit 332 starts receiving foot pressure distribution calculation data and triaxial acceleration data transmitted from the rehabilitation shoe 110L for the left foot and the rehabilitation shoe 110R for the right foot.

  In step S703, the walking motion analysis unit 332 starts recording the foot pressure distribution calculation data and the triaxial acceleration data received in step S702 in the storage unit 323.

  FIG. 8 is a diagram illustrating an example of foot pressure distribution calculation data and triaxial acceleration data recorded in the storage unit 323. As shown in FIG. 8, the foot pressure distribution calculation data 334 and the triaxial acceleration data 335 respectively transmitted from the left foot rehabilitation shoe 110L and the right foot rehabilitation shoe 110R are associated with the elapsed time from the measurement start time. Recorded.

  In this embodiment, the triaxial acceleration data 335 is composed of acceleration data groups in the X axis direction, the Y axis direction, and the Z axis direction, and the foot pressure distribution calculation data 334 is foot pressure data from N pressure sensitive elements. It consists of a group. In the example of FIG. 8, the sampling interval of the triaxial acceleration data 335 and the foot pressure distribution calculation data 334 is 100 mmsec, but the present invention is not limited to this.

  Returning to FIG. In step S704, the triaxial motion analysis unit 333 uses the acceleration data recorded in the storage unit 323 in the X axis direction and the Y axis direction to see the motion of the subject's foot while walking from above. The locus of displacement in the case (that is, in the XY axis plane) is calculated.

  In step S705, the triaxial motion analysis unit 333 uses the acceleration data in the Z axis direction and the Y axis direction recorded in the storage unit 323 to see the motion of the foot while the subject is walking from the side. The locus of displacement in the case (that is, in the YZ axis plane) is calculated.

  In step S <b> 706, the foot pressure distribution calculation unit 331 calculates the foot pressure distribution data at each elapsed time based on the foot pressure distribution calculation data 334 recorded in the storage unit 323. Specifically, a color scheme corresponding to the value of each foot pressure data is added to a position corresponding to the arrangement of each pressure sensitive element. When calculating the foot pressure distribution data, the position coordinates of the foot pressure distribution data on the XY axis plane are also calculated using the corresponding acceleration data in the X-axis direction and the Y-axis direction.

  In step S707, the walking motion analysis unit 332 determines whether or not a measurement end instruction has been input. If it is determined that a measurement end instruction has not been input, the process returns to step S704 to continue the process. On the other hand, if it is determined in step S707 that a measurement end instruction has been input, the process proceeds to step S708.

  In step S708, the stride of each foot of the subject is calculated based on the displacement locus on the Y-Z axis plane calculated in step S705. Specifically, in the displacement locus on the YZ axis plane calculated in step S705, a time point having a height position that matches the height position at the measurement start time point is extracted, and the XY axis at each time point is extracted. The position coordinates of the plane are calculated. Then, these processes are performed for each of the right foot and the left foot, and the distance between adjacent position coordinates is calculated to obtain the stride of the subject.

  In step S709, the displacement trajectory in the XY axis plane calculated in step S704, the displacement trajectory in the YZ axis plane calculated in step S705, the foot pressure distribution data calculated in step S706, and in step S708 The calculated stride is displayed as a walking motion analysis result.

  FIG. 9 is a diagram illustrating an example of the walking motion analysis result displayed in step S709. In FIG. 9, reference numeral 901 indicates the locus of the left foot of the subject among the displacement locus on the XY axis plane calculated in step S704. Reference numeral 902 denotes a trajectory of the subject's right foot among the displacement trajectories in the XY axis plane calculated in step S704.

  Reference numeral 911 denotes a locus of the left foot of the subject among the displacement locus on the YZ axis plane calculated in step S705. Reference numeral 912 denotes the trajectory of the subject's right foot among the displacement trajectories on the YZ axis plane calculated in step S705.

  Reference numeral 921 denotes the foot pressure distribution data of the left foot at a predetermined elapsed time among the foot pressure distribution data calculated in step S706. Similarly, 922 indicates foot pressure distribution data of the right foot at a predetermined elapsed time among the foot pressure distribution data calculated in step S706.

  931 determines the position and orientation of the foot type (predetermined foot type) of the subject's left foot based on the foot pressure distribution data while the left foot is landing, and superimposes it on the foot pressure distribution data 921 It is a foot type displayed together. Similarly, 932 determines the position and orientation of the foot shape (predetermined foot shape) of the subject's right foot based on the foot pressure distribution data while the right foot is landing, and foot pressure distribution data This is a foot pattern superimposed on 922.

  Reference numerals 941 and 942 denote the stride calculated in step S708. In order to clearly indicate the stride, it is assumed that the past footprints are displayed as they are regardless of the elapsed time.

  In the foot pressure distribution measurement system according to the present embodiment, a triaxial acceleration sensor unit is attached to each foot of the subject, and the triaxial acceleration data together with the foot pressure distribution calculation data corresponds to the elapsed time from the start of measurement. It was set as the structure which attaches and records. Further, by processing the triaxial acceleration data, the trajectory on the XY axis plane, the trajectory on the YZ axis plane, the stride of the subject's foot during walking is calculated, and the foot pressure distribution at each elapsed time is calculated. It was set as the structure which calculates the position coordinate in the XY-axis plane of data.

  Further, the calculated trajectory and stride are displayed, and the foot pressure distribution data is displayed based on the position coordinates of the calculated foot pressure distribution data on the XY axis plane.

  As a result, it is possible to display the motion of the entire foot during walking together with the foot pressure distribution data, and to quantitatively grasp the relationship between the foot pressure distribution and the walking motion of the entire foot.

  That is, it is possible to accurately and quantitatively grasp the state of the subject during walking.

[Second Embodiment]
In the first embodiment, only the foot pressure distribution data at a predetermined elapsed time is displayed. However, the present invention is not limited to this. For example, the foot pressure distribution data at each landing timing during walking may be displayed simultaneously on the same plane.

  FIG. 10 is a diagram illustrating an example of a walking motion analysis result. Among the display contents shown in FIG. 10, the same display contents as the display contents shown in FIG. 9 are assigned the same reference numerals, and the description thereof is omitted here.

  A difference from FIG. 9 is foot pressure distribution data 1021 to 1023. In the case of FIG. 9, only the foot pressure distribution data at a predetermined elapsed time is displayed. However, in this embodiment, the foot pressure distribution data at each timing when each foot is landing during walking is landed. It is the point which is simultaneously displayed at each position.

  Thus, by simultaneously displaying the foot pressure distribution data at different elapsed times on the same screen, it is possible to list the foot pressure distribution data at each number of steps.

[Third Embodiment]
In the first and second embodiments, the displacement in the X-axis direction, the Y-axis direction, and the Z-axis direction is calculated based on the triaxial acceleration data, and the trajectory of each foot during walking on the XY-axis plane and Although the trajectory of each foot during walking on the YZ axis plane is displayed, the present invention is not limited to this.

  By integrating the triaxial acceleration data once, the motion speed of each foot at each elapsed time can be calculated. Therefore, the motion speed may be displayed together. Note that the operation speed display method may be, for example, a numerical value or a vector having a length proportional to the operation speed.

  In addition to the trajectory of each foot during walking in the XY axis plane and the trajectory of each foot during walking in the YZ axis plane, the turning angle of each foot during walking in the XY axis plane and YZ The angle of raising each foot during walking on the axial plane may be calculated and displayed together.

  In the first and second embodiments, when calculating the stride, paying attention to acceleration data in the Z-axis direction, the timing at which each foot has landed is the timing at which the height of each foot has reached the reference position. The stride is calculated based on the position coordinates of each foot at the timing, but the present invention is not limited to this. For example, referring to the foot pressure distribution data, the timing at which the contact area is maximized is determined to be the timing at which each foot has landed, and the stride is calculated using the position coordinates of each foot at that timing. It may be configured.

  In the first and second embodiments, the communication units 112R and 112L and the triaxial acceleration sensor units 111R and 111L of each foot are attached to the band-shaped member. However, the present invention is not limited to this. It is good also as a structure attached in rehabilitation shoes 110R, 110L.

  Moreover, in the said 1st and 2nd embodiment, although it was set as the structure which embeds a pressure sensitive element directly in the bottom of rehabilitation shoes, this invention is not limited to this. For example, in the case where a locking member is provided on the insole of the rehabilitation shoe and the insole portion is locked to eliminate the displacement of the insole portion during walking, the pressure sensitive element is embedded in the insole portion. It may be.

  In the first and second embodiments, the three-axis acceleration sensor is arranged and the trajectory of the foot motion is calculated based on the three-axis acceleration data. However, the present invention is not limited to this. A gyro sensor or the like may be used.

  In the first and second embodiments, the stride of the subject is calculated based on the triaxial acceleration data from the triaxial acceleration sensor. However, the present invention is not limited to this, and the GPS is not limited to this. A position sensor such as the above may be used.

  This application claims priority based on Japanese Patent Application No. 2013-004031 filed on Jan. 11, 2013, the entire contents of which are incorporated herein by reference.

100: Foot pressure distribution measurement system, 110R: Rehabilitation shoes for right foot, 110L: Rehabilitation shoes for left foot, 111R: 3-axis acceleration sensor unit, 111L: 3-axis acceleration sensor unit, 112R: Communication unit, 112L: Communication unit, 120: Information processing device, 201R: Foot pressure distribution detection sensor unit, 202R: Pressure sensitive element, 203R: Power supply unit

Claims (8)

A measuring device for evaluating the walking of a subject,
A foot pressure distribution detection sensor unit comprising a plurality of pressure sensitive elements;
A triaxial acceleration sensor unit that detects movements of the subject's legs in three axial directions;
The foot pressure distribution calculation data obtained by measurement by the foot pressure distribution detection sensor unit and the triaxial acceleration data obtained by measurement by the triaxial acceleration sensor are converted into the foot pressure distribution detection sensor unit and the three axes. A communication device comprising: a communication unit that transmits to the outside in association with an elapsed time from the start of measurement by the acceleration sensor. A footwear comprising the measuring device according to claim 1,
The footwear distribution detecting sensor unit is disposed on an insole portion of the footwear or an insole portion of the footwear. An information processing apparatus that receives and processes foot pressure distribution calculation data and triaxial acceleration data transmitted from the measurement apparatus according to claim 1,
Based on the three-axis acceleration data, the trajectory of the subject's foot when the subject's walking motion is viewed from the side, and the walking motion of the subject when viewed from above. First calculating means for calculating a trajectory of the movement of the subject's foot;
Each elapsed time from the start of measurement when obtaining foot pressure distribution data colored based on the foot pressure distribution calculation data and using the position of the three-axis acceleration sensor unit at the start of measurement as a reference Second calculating means for calculating position coordinates of the foot pressure distribution data in
And a display means for displaying the trajectory calculated by the first calculating means and displaying the foot pressure distribution data obtained by the second calculating means at the calculated position coordinates. Information processing apparatus.   The apparatus further comprises third calculation means for calculating the stride of the subject by calculating the landing position of each foot in the walking motion of the subject based on the triaxial acceleration data. The information processing apparatus according to claim 3.   The display means further displays a foot shape indicating a shape of a sole of the subject on the foot pressure distribution data based on the foot pressure distribution data at the landing position. Item 5. The information processing apparatus according to Item 4.   The information processing apparatus according to claim 5, wherein the display unit displays foot pressure distribution data at a predetermined elapsed time among the elapsed times from the measurement start time.   The information processing apparatus according to claim 5, wherein the display unit simultaneously displays the foot pressure distribution data at different elapsed times among the elapsed times from the measurement start time. An information processing apparatus that receives and processes foot pressure distribution calculation data and triaxial acceleration data transmitted from the measurement apparatus according to claim 1,
Based on the three-axis acceleration data, the trajectory of the subject's foot when the subject's walking motion is viewed from the side, and the walking motion of the subject when viewed from above. First calculating means for calculating a trajectory of the movement of the subject's foot;
Each elapsed time from the start of measurement when obtaining foot pressure distribution data colored based on the foot pressure distribution calculation data and using the position of the three-axis acceleration sensor unit at the start of measurement as a reference Second calculating means for calculating position coordinates of the foot pressure distribution data in
The trajectory calculated by the first calculation means is displayed, and the foot pressure distribution data obtained by the second calculation means is displayed as a display means for displaying the calculated position coordinates. Program to do.