Technology succession support system, technology succession support method, and technology succession support program

Abstract

To provide a technology succession support system that supports a worker in succession of a skilled worker's technology through a series of predetermined work movements with less physical strain. SOLUTION: A technology transfer support system 1A of the present invention includes at least one measurement device 10 that measures acceleration and angular velocity associated with the posture and movement of a subject U while working, and an information processing device 20 that evaluates the work of the subject U based on the acceleration data and angular velocity data of the subject U acquired by the measurement device 10. The information processing device 20 includes a calculation unit 22 that calculates the jerk, angular jerk, and posture angle in three mutually orthogonal axial directions from the acceleration data and angular velocity data of the subject, and an evaluation unit 24 that compares each of the jerk, angular jerk, and posture angle calculated by the calculation unit 22 with a threshold value set based on a preset posture and movement of an expert while working, to evaluate whether each of the jerk, angular jerk, and posture angle of the subject is equal to or greater than a threshold value.

Description

[Technical field]

[0001] The present invention relates to a technology succession support system, a technology succession support method, and a technology succession support program for supporting the succession of work techniques of an expert to an unexpert. [Background technology]

[0002] For example, in industries where physical labor is required, such as the medical and welfare service industry, the transportation industry, and the construction industry, workers who are inexperienced in the work need to perform the same tasks as skilled workers. In addition, in these industries, there has been a labor shortage in recent years, and the number of inexperienced workers, such as non-regular workers, elderly workers, and foreign workers, who are engaged in the work is increasing. Inexperienced workers may work in unnatural postures and movements, which can cause injuries to the body. That is, in nursing care tasks such as transferring a care recipient from a bed to a wheelchair or from a wheelchair to a bed, assisting the care recipient in bathing, and assisting the care recipient in defecation in the toilet, there has been a problem of workers' lower backs being injured as a result of working in unnatural postures and movements when caring for the care recipient.

[0003] In order to solve such problems, it is desirable for unskilled workers to quickly acquire the work techniques of skilled workers. For example, Patent Document 1 has developed a technology transfer tracing system that can transfer the skills of a skilled worker to a unskilled worker even when the skilled worker is not present. In addition, Patent Document 2 has developed a load measurement system that can calculate a load index that indicates the degree of load on the user's body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-153717 A [Patent Document 2] JP 2020-124464 A Summary of the Invention [Problem to be solved by the invention]

[0005] The technology transfer tracing system of Patent Document 1 compares prepared motion model data relating to a prescribed task of an expert with actual motion data corresponding to the actual motion of a worker, and converts the motion model data into a format corresponding to the actual motion data.Then, the actual motion data and the converted motion model data are superimposed on a screen, and whether the prescribed task of the worker is correct is judged based on whether the amount of deviation on the screen between the actual motion data and the converted motion model data is within a predetermined threshold.

[0006] The load measurement system in Patent Document 2 is equipped with a load measurement device having acceleration sensors attached at positions above and below the waist in the extension direction of the spine, and measures physical quantities reflecting the user's posture such as the inclination and rotation of the upper body, for example, the angle of the spine with respect to the ground caused by bending the waist, etc. Then, the degree of strain on the waist is calculated based on the measured values, and compared with a predetermined standard, and a warning is issued according to the comparison result.

[0007] However, the systems of Patent Documents 1 and 2 compare the posture or movement of an unskilled person while working with the posture or movement of an expert while working, or with an ideal posture or movement, but do not evaluate the smoothness of the movement, which is an important element in work. Therefore, there is a problem that an unskilled person focuses too much on the posture or specific movement while working, and the movement between postures or the movement between specific movements is not smooth, and the unsmooth movement puts strain on the body, and still causes injury to the body.

[0008] The present invention has been made to solve the above-mentioned problems, and aims to provide a technology transfer support system, a technology transfer support method, and a technology transfer support program that assist workers in inheriting the skills of skilled workers through a series of movements for a specified task that places less strain on the body. [Means for solving the problem]

[0009] The technology transfer support system of the present invention includes at least one measuring device that measures acceleration and angular velocity in three mutually orthogonal axial directions or coordinates in three mutually orthogonal axial directions associated with the posture and movement of a subject during work, and an information processing device that evaluates the work of a subject based on the acceleration data and angular velocity data of the subject acquired by the measuring device or the coordinate data of the subject. The information processing device includes a calculation unit that calculates at least one of jerk related to up-down movement, left-right movement, and forward-backward movement, and angular jerk related to forward bending, lateral bending, and rotation, and posture angles related to forward bending, lateral bending, and rotation from the acceleration data and angular velocity data of the subject acquired by the measuring device, and an evaluation unit that compares at least one of the jerk and angular jerk calculated by the calculation unit and each posture angle with a preset threshold value to evaluate whether or not at least one of the jerk and angular jerk of the subject and each posture angle are equal to or greater than a threshold value. The threshold value is set based on at least one of the model jerk related to up-down movement, left-right movement, and front-back movement, and the model angular jerk related to forward bending, lateral bending, and rotation, and the model posture angle related to forward bending, lateral bending, and rotation, which are calculated by a calculation unit from the acceleration model data and angular velocity model data in three mutually perpendicular axial directions associated with the posture and movement of a skilled worker when performing a specified task, obtained by a measurement device, or the coordinate model data in three mutually perpendicular axial directions.

[0010] In a preferred embodiment of the technology transfer support system, the measurement device includes a first measurement device that is attached to the upper spinal column of a subject and measures acceleration and angular velocity in three mutually perpendicular axial directions.

[0011] In a further preferred embodiment of the technology transfer support system, the measurement device further includes a second measurement device attached to the pelvis of the subject and configured to measure acceleration and angular velocity in three mutually perpendicular axial directions.

[0012] In addition, the technology transfer support system of a preferred embodiment further includes a warning device that operates based on the evaluation result of the evaluation unit. The information processing device further includes a warning instruction unit that instructs the warning device to issue a warning based on the evaluation result of the evaluation unit. The warning instruction unit instructs the warning device to issue a warning when at least one of each jerk and each angular jerk of the subject and at least one of each posture angle are equal to or greater than a threshold. The warning device issues a different warning when at least one of each jerk and each angular jerk of the subject is equal to or greater than a threshold and when at least one of each posture angle of the subject is equal to or greater than a threshold.

[0013] In a further preferred embodiment of the technology transfer support system, the warning device issues an audible warning if at least one of the subject's jerk and angular jerk is above a threshold, and issues a vibration warning if at least one of the subject's posture angles is above a threshold.

[0014] In a more preferred embodiment of the technology transfer support system, the warning device issues a warning by light.

[0015] In addition, the technology transfer support method of the present invention includes a data acquisition step of acquiring acceleration data and angular velocity data in three mutually perpendicular axial directions, or coordinate data in three mutually perpendicular axial directions, associated with the posture and movements of the subject during work, measured by a measuring device; a calculation step of calculating at least one of the jerk associated with up-down movement, left-right movement, and forward-backward movement, and the angular jerk associated with forward bending, lateral bending, and rotation, and the posture angles associated with forward bending, lateral bending, and rotation from the acquired acceleration data and angular velocity data of the subject, or the coordinate data of the subject; and an evaluation step of comparing the calculated jerk and at least one of the calculated angular jerk, as well as each posture angle, with a predetermined threshold value to evaluate whether each of the subject's jerk and at least one of the angular jerk, as well as each posture angle is equal to or greater than the threshold value. The threshold value is set based on at least one of the model jerk related to up-down movement, left-right movement, and front-back movement, and the model angular jerk related to forward bending, lateral bending, and rotation, and the model posture angle related to forward bending, lateral bending, and rotation, calculated from the acceleration model data and angular velocity model data in three mutually perpendicular axial directions associated with the posture and movement of the skilled worker when performing a specified task, obtained by a measuring device, or the coordinate model data in three mutually perpendicular axial directions.

[0016] In addition, the technology transfer support program of the present invention causes a computer to execute processing including a data acquisition step of acquiring acceleration data and angular velocity data in three mutually perpendicular axial directions, or coordinate data in three mutually perpendicular axial directions, associated with the posture and movements of the subject during work, measured by a measuring device; a calculation step of calculating, from the acquired acceleration data and angular velocity data of the subject, at least one of the jerk related to up-down movement, left-right movement, and forward-backward movement, and at least one of the angular jerk related to forward bending, lateral bending, and rotation, and the posture angles related to forward bending, lateral bending, and rotation; and an evaluation step of comparing the calculated jerk and at least one of the angular jerk, as well as each posture angle, with a preset threshold value to evaluate whether each of the subject's jerk and at least one of the angular jerk, as well as each posture angle is equal to or greater than the threshold value. The threshold value is set based on at least one of the model jerk related to up-down movement, left-right movement and front-back movement and the model angular jerk related to forward bending, lateral bending and rotation, and the model posture angle related to forward bending, lateral bending and rotation, calculated from the acceleration model data and angular velocity model data in three mutually perpendicular axial directions associated with the posture and movement of the skilled worker when performing a specified task obtained by a measuring device, or the coordinate data in three mutually perpendicular axial directions. Effect of the Invention

[0017] According to the present invention, a worker can learn the skills of an expert through a series of movements for a predetermined task, which places less strain on the worker's body. [Brief description of the drawings]

[0018] [Figure 1] 1 is a block diagram showing a configuration of a technology succession support system according to a first embodiment of the present invention. [Diagram 2] 2 is a rear view showing a state in which a measuring device of the technology transfer support system of FIG. 1 is attached to a subject. [Diagram 3] 1 is a flowchart showing a method for supporting technology succession according to a first embodiment of the present invention. [Figure 4] FIG. 11 is a block diagram showing a configuration of a technology succession support system according to a second embodiment of the present invention. [Diagram 5]5 is a rear view showing a state in which a measuring device of the technology transfer support system of FIG. 4 is attached to a subject. [Figure 6] 1 is a graph showing the evaluation results of the jerk of the up and down movement of the upper spine in Example 1. [Figure 7] 1 is a graph showing the evaluation results of the jerk of the left and right movement of the upper spinal column in Example 1. [Figure 8] 1 is a graph showing the evaluation results of the jerk of the forward and backward movement of the upper spinal column in Example 1. [Figure 9] 1 is a graph showing the evaluation results of the posture angle of forward bending of the upper spine in Example 1. [Figure 10] 1 is a graph showing the evaluation results of the posture angle of lateral bending of the upper spine in Example 1. [Figure 11] 1 is a graph showing the evaluation results of the posture angle of the rotation of the upper spine in Example 1. [Figure 12] 1 is a graph showing the evaluation results of the angular jerk of forward bending of the upper spine in Example 1. [Figure 13] 1 is a graph showing the evaluation results of the angular jerk of lateral bending of the upper spine in Example 1. [Figure 14] 1 is a graph showing the evaluation results of the angular jerk of the rotational movement of the upper spine in Example 1. [Figure 15] 13 is a graph showing the evaluation results of the jerk of the up and down movement of the pelvis in Example 2. [Figure 16] 13 is a graph showing the evaluation results of the jerk of the left and right movement of the pelvis in Example 2. [Figure 17] 13 is a graph showing the evaluation results of the jerk of the forward and backward movement of the pelvis in Example 2. [Figure 18] 13 is a graph showing the evaluation results of the posture angle of forward bending of the trunk in Example 2. [Figure 19] 13 is a graph showing the evaluation results of the posture angle of lateral bending of the trunk in Example 2. [Figure 20] 13 is a graph showing the evaluation results of the posture angle of trunk rotation in Example 2. [Figure 21] 13 is a graph showing the evaluation results of the angular jerk of forward bending of the trunk in Example 2. [Figure 22]13 is a graph showing the evaluation results of the angular jerk of lateral flexion of the trunk in Example 2. [Diagram 23] 13 is a graph showing the evaluation results of the angular jerk of the trunk rotation in Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The present invention relates to a system for supporting technical succession, which is a system for evaluating the work of a person who is unfamiliar with a task by comparing the work of the person with that of an expert, in order to support the person who is unfamiliar with the task in succession of the task of an expert.

[0020] [Embodiment 1] First, a technical succession support system 1A according to a first embodiment of the present invention will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a block diagram showing the configuration of the technical succession support system 1A according to the first embodiment. Fig. 2 is a rear view showing a state in which a measuring device 10 of the technical succession support system 1A according to the first embodiment is attached to a subject U. In the following, as shown in Fig. 2, the front-rear direction, left-right direction, and up-down direction are defined based on the front-rear, left-right, up-down directions of the subject.

[0021] 1, the technology transfer support system 1A includes a measurement device 10, an information processing device 20, and a warning device 30. The technology transfer support system 1A may further include a display device 40. The measurement device 10, the information processing device 20, the warning device 30, and the display device 40 are connected directly or via a network such as the Internet, a LAN (Local Area Network), or Bluetooth (registered trademark).

[0022] The measuring device 10 is a device that measures the acceleration and angular velocity in three mutually orthogonal axial directions associated with the posture and movement of the subject U during work. As shown in FIG. 2, in the first embodiment, the measuring device 10 has a first measuring device 11 attached to the upper spinal column of the subject U on the back of the subject U. Whether the subject U is moving smoothly can be determined by grasping the movement of the subject U's trunk. Since the movement of the upper spinal column is highly correlated with the movement of the trunk, in the first embodiment, the first measuring device 11 is attached to the upper spinal column of the subject U. The first measuring device 11 is composed of an acceleration sensor capable of measuring the acceleration in the up-down direction, the left-right direction, and the front-back direction, and an angular velocity sensor capable of measuring the angular velocity around the axis in the up-down direction, the left-right direction, and the front-back direction. For example, a three-axis acceleration sensor, a three-axis gyro sensor, an inertial measurement unit (IMU), or the like is used as the first measuring device 11. The first measuring device 11 measures the acceleration and angular velocity occurring in the upper spinal column of the subject U over time along the time axis while the subject U performs a predetermined task. The first measuring device 11 transmits the measured acceleration and angular velocity to the information processing device 20 as acceleration data and angular velocity data.

[0023] Here, the prescribed work is, for example, nursing care work, such as transferring a care recipient from a bed to a wheelchair or from a wheelchair to a bed, bathing assistance work to assist a care recipient in bathing, defecation assistance work to assist a care recipient in defecation in the toilet, etc. Note that prescribed work is not limited to nursing care work, but also includes transportation work such as handling luggage and construction work at a building site.

[0024] The information processing device 20 is a device that evaluates the activity of the subject U based on the acceleration data and angular velocity data of the subject U acquired by the measurement device 10. The information processing device 20 includes an acquisition unit 21, a calculation unit 22, a threshold setting unit 23, an evaluation unit 24, a warning instruction unit 25, a storage unit 26, and a control unit 27. The information processing device 20 is a computer such as a microcomputer or a server computer.

[0025] The acquiring unit 21 acquires the acceleration in the up-down direction, the left-right direction, and the front-back direction, and the angular velocities around axes in the up-down direction, the left-right direction, and the front-back direction measured by the measuring device 10. Specifically, the acquiring unit 21 acquires the acceleration data and the angular velocity data transmitted by the measuring device 10.

[0026] The calculation unit 22 calculates the jerk associated with the up-down, left-right, and front-back movements of the subject U, the posture angle associated with the forward bending, lateral bending, and rotation of the subject U, and the angular jerk associated with the forward bending, lateral bending, and rotation of the subject U, from the acceleration data and angular velocity data of the subject U acquired by the measurement device 10. Here, the jerk and angular jerk are the position of the first measurement device 11 worn on the subject U, i.e., the jerk and angular jerk of the upper spinal column, and the posture angle is the position of the first measurement device 11 worn on the subject U, i.e., the displacement of the Euler angles per sampling time of the upper spinal column.

[0027] Specifically, the jerk is calculated by differentiating acceleration data in three mutually orthogonal axial directions measured by the first measuring device 11 to calculate the jerk related to up-down movement, left-right movement, and front-back movement. The posture angle is calculated by integrating angular velocity data in three mutually orthogonal axial directions measured by the first measuring device 11 to calculate the Euler angles related to forward bending, lateral bending, and rotation, and by determining the displacement of the Euler angles for each sampling time, the posture angle related to forward bending, lateral bending, and rotation is calculated. The angular jerk is calculated by differentiating the angular velocity data measured by the first measuring device 11 to calculate angular acceleration data related to forward bending, lateral bending, and rotation, and the angular acceleration data is further differentiated to calculate the angular jerk related to forward bending, lateral bending, and rotation.

[0028] The threshold setting unit 23 sets thresholds which are limit values ​​of each jerk, each posture angle, and each angular jerk of the subject U. The thresholds are set based on the model jerk related to the up-down movement, the left-right movement, and the front-back movement, the model posture angle related to forward bending, lateral bending, and rotation, and the model angular jerk related to forward bending, lateral bending, and rotation, which are calculated by the calculation unit 22 from the acceleration model data and the angular velocity model data in three mutually orthogonal axial directions associated with the posture and movement of the skilled worker when performing a predetermined task acquired by the measurement device 10.

[0029] Specifically, the measurement device 10 is attached to a skilled worker, and the acceleration and angular velocity associated with the posture and movement of the skilled worker when the skilled worker performs various predetermined tasks are measured in advance. The acceleration and angular velocity measured by the measurement device 10 are stored in the storage unit 26 of the information processing device 20 as acceleration model data and angular velocity model data of the skilled worker.

[0030] In this case, the acceleration model data and the angular velocity model data are stored for each of the plurality of predetermined tasks. Since postures and movements of the tasks are different depending on the location where the predetermined tasks are performed, such as a nursing home, the acceleration model data and the angular velocity model data may be stored for each nursing home, or even for each location in the nursing home where the predetermined tasks are performed. The acceleration model data and the angular velocity model data may be created from the accelerations and angular velocities associated with the postures and movements of the plurality of skilled workers for each predetermined task. In this case, the acceleration model data and the angular velocity model data are created by averaging the accelerations and angular velocities of the plurality of skilled workers at each predetermined sampling time from the start to the end of the task.

[0031] The threshold setting unit 23 reads out the acceleration model data and angular velocity model data related to the predetermined task for which the threshold is to be set, stored in the storage unit 26, and causes the calculation unit 22 to calculate each model jerk, each model posture angle, and each model angular jerk in the same manner as in the case of the subject U. Then, the threshold setting unit 23 acquires each model jerk, each model posture angle, and each model angular jerk from the calculation unit 22, and calculates the maximum value of each model jerk, each model posture angle, and each model angular jerk. Then, the threshold setting unit 23 adds a preset standard deviation to the maximum value of each model jerk, each model posture angle, and each model angular jerk, and sets the threshold value of the jerk related to the up-down movement, the left-right movement, and the forward-backward movement, the threshold value of the posture angle related to forward bending, lateral bending, and rotation, and the threshold value of the angular jerk related to forward bending, lateral bending, and rotation. The standard deviation is a value calculated from each model jerk, each model posture angle, and each model angular jerk of a plurality of skilled persons who performed the same predetermined task.

[0032] The evaluation unit 24 compares each jerk, each posture angle, and each angular jerk calculated by the calculation unit 22 with a preset threshold value to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold value. The evaluation unit 24 determines, for each sampling time while the subject U is performing a predetermined task, whether each jerk, each posture angle, and each angular jerk of the subject U exceeds the threshold value of each jerk, the threshold value of each posture angle, and the threshold value of each angular jerk corresponding to the predetermined task performed by the subject U, and evaluates the task of the subject U.

[0033] The warning instruction unit 25 instructs the warning device 30 to issue a warning based on the evaluation result of the evaluation unit 24. The warning instruction unit 25 instructs the warning device 30 to issue a warning when at least one of each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than a threshold value.

[0034] The storage unit 26 stores various information, data, programs, etc. The storage unit 26 is composed of a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit 26 stores acceleration model data and angular velocity model data of an expert for each of a plurality of predetermined tasks. The storage unit 26 also stores a technology transfer support program for evaluating the tasks of the subject U.

[0035] The control unit 27 is configured with a processor such as a CPU (Central Processing Unit). The control unit 27 controls the operations of the acquisition unit 21, the calculation unit 22, the threshold setting unit 23, the evaluation unit 24, the warning instruction unit 25, and the storage unit 26 by executing a program.

[0036] The warning device 30 operates based on the evaluation result of the evaluation unit 24. The warning device 30 issues a warning when at least one of the jerk, posture angle, and angular jerk of the subject U is equal to or greater than a threshold. Preferably, the warning device 30 issues a different warning when at least one of the jerk and angular jerk of the subject U is equal to or greater than a threshold and when at least one of the posture angles of the subject U is equal to or greater than a threshold.

[0037] In the first embodiment, the warning device 30 includes a first warning device 31 that issues a warning by sound and vibration, and an optical warning device 33 that issues a warning by light. The first warning device 31 is, for example, a small speaker and / or a vibration generating device. The first warning device 31 is provided on the back of the subject U, at the upper spine of the subject U. The optical warning device 33 is, for example, an LED warning light. The optical warning device 33 is provided at a position where the subject U performs a predetermined task and where the instructor who instructs the subject U can mainly see it while the subject U is performing the predetermined task. This allows the instructor to grasp the posture and movement of the subject U, and to easily provide instruction. The optical warning device 33 may be provided at a position where the instructor and the subject U can see it.

[0038] When at least one of the jerk and angular jerk of the subject U is equal to or greater than a threshold, the first warning device 31 issues a warning by sound, and the optical warning device 33 issues a warning by a first color. When at least one of the posture angles of the subject U is equal to or greater than a threshold, the first warning device 31 issues a warning by vibration, and the optical warning device 33 issues a warning by a second color. When at least one of the jerk and angular jerk of the subject U and at least one of the posture angles of the subject U are both equal to or greater than a threshold, the first warning device 31 issues a warning by sound and vibration, and the optical warning device 33 issues a warning by a third color.

[0039] In the first embodiment, the first measuring device 11 and the first warning device 31 are configured as an integrated small device. The first measuring device 11 and the first warning device 31 are attached to a vest or the like, and when the subject U wears the vest or the like, the first measuring device 11 and the first warning device 31 are provided on the upper spinal column of the subject U as shown in Fig. 2. The information processing device 20 is configured as a server computer, and is connected to the first measuring device 11 and the first warning device 31 via a network.

[0040] The display device 40 is a device that allows the subject U to visually check the results of evaluation of the series of predetermined tasks of the subject U by the technology transfer support system 1 after the fact. The display device 40 displays each jerk, each posture angle, and each angular jerk of the subject U in the series of predetermined tasks in comparison with each model jerk, each model posture angle, and each model angular jerk of a skilled person in the series of predetermined tasks. The display device 40 is, for example, a television monitor, a display, a mobile terminal display, etc.

[0041] Next, a method for supporting technical succession that evaluates the work of a subject U based on the technical succession support system 1A will be described with reference to Fig. 3. Fig. 3 is a flowchart showing the method for supporting technical succession according to the embodiment 1. Each process of the method for supporting technical succession is executed by a technical succession support program stored in the information processing device 20.

[0042] Below, we will explain a method of supporting skill transfer in which the measurement device 10 measures acceleration in the up-down, left-right, and front-to-back directions, as well as angular velocity around axes in the up-down, left-right, and front-to-back directions, to evaluate the work of the subject U.

[0043] First, before starting work, the subject U starts the technology transfer support system 1A, selects the predetermined work to be performed, and then starts the work. When the predetermined work is selected, the threshold setting unit 23 acquires the acceleration model data and angular velocity model data of three mutually orthogonal axial directions related to the selected predetermined work from the storage unit 26 (S10). Then, the threshold setting unit 23 transmits the acquired acceleration model data and angular velocity model data to the calculation unit 22, and causes the calculation unit 22 to calculate each model jerk, each model posture angle, and each model angular jerk.

[0044] When the calculation unit 22 receives the acquired acceleration model data and each velocity model data, it calculates model jerk for vertical movement, left and right movement, and forward and backward movement, model posture angle for forward bending, lateral bending, and rotation, and model angular jerk for forward bending, lateral bending, and rotation, and transmits them to the threshold setting unit 23. When the threshold setting unit 23 receives each model jerk, each model posture angle, and each model angular jerk, it adds a standard deviation to the maximum value of each model jerk, each model posture angle, and each model angular jerk to set a threshold value for the jerk for vertical movement, left and right movement, and forward and backward movement, a threshold value for the posture angle for forward bending, lateral bending, and rotation, and a threshold value for the angular jerk for forward bending, lateral bending, and rotation (S12). The set threshold value is transmitted to the evaluation unit 24.

[0045] On the other hand, when the subject U starts working, the first measuring device 11 measures the acceleration and angular velocity in three mutually perpendicular axial directions occurring in the upper spinal column of the subject U as the subject U works (S14). When the acceleration and angular velocity are measured by the first measuring device 11, the acquiring unit 21 executes a data acquiring step of acquiring the acceleration and angular velocity measured by the first measuring device 11 as acceleration data and angular velocity data over time for each sampling time (S16). The acquired acceleration data and angular velocity data are transmitted to the calculating unit 22.

[0046] When the calculation unit 22 receives the acceleration data and the angular velocity data, it executes a calculation step of differentiating or integrating the acceleration data and the angular velocity data to calculate the jerk related to the up-down movement, the left-right movement, and the forward-backward movement, the posture angle related to the forward bending, the lateral bending, and the rotation, and the angular jerk related to the forward bending, the lateral bending, and the rotation (S18). Each calculated jerk, each posture angle, and each angular jerk are sent to the evaluation unit 24.

[0047] When the evaluation unit 24 receives each jerk, each posture angle, each angular jerk, and the threshold, it executes an evaluation step (S20) of comparing each jerk, each posture angle, and each angular jerk with the respective threshold to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold. If at least one of the jerk, each posture angle, and each angular jerk is equal to or greater than the threshold, the evaluation unit 24 instructs the warning instruction unit 25 to issue a warning together with information on which parameter of each jerk, each posture angle, and each angular jerk is equal to or greater than the threshold.

[0048] Upon receiving an instruction to issue a warning from the evaluation unit 24, the warning instruction unit 25 executes a warning instruction step of instructing the first warning device 31 and the light warning device 33 to issue a warning (S22). Specifically, when any of the jerk and angular jerk is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 to issue a one-second sound warning and instructs the light warning device 33 to emit a first color. When any of the posture angles is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 to issue a vibration warning and instructs the light warning device 33 to emit a second color. When any of the jerk and angular jerk and any of the posture angles are both equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 to issue a one-second sound warning and a vibration warning and instructs the light warning device 33 to emit a third color. Due to the warnings from the first warning device 31 and the optical warning device 33, the subject U realizes that his / her working posture and movements are not good.

[0049] The data acquisition step, calculation step, evaluation step, and warning instruction step are executed for each sampling time of the acceleration and angular velocity measured by the first measuring device 11. The control unit 27 determines whether the subject U's work is continuing or has ended (S24), and ends the processing of the technology transfer support method when the subject U's work has ended. The end of the subject U's work is determined by a switch operated by the subject U himself at the time of ending, or by the passage of a certain amount of time, etc.

[0050] [Embodiment 2] Next, a technical succession support system 1B according to a second embodiment of the present invention will be described with reference to Fig. 4 and Fig. 5. Fig. 4 is a block diagram showing the configuration of the technical succession support system 1B according to the second embodiment. Fig. 5 is a rear view showing a state in which the measurement device 10 of the technical succession support system 1B of the second embodiment is attached to a subject U. Below, the differences between the second embodiment and the first embodiment will be described.

[0051] 4, the technology transfer support system 1B includes a measurement device 10, an information processing device 20, and a warning device 30. The technology transfer support system 1B may further include a display device 40. The measurement device 10, the information processing device 20, the warning device 30, and the display device 40 are connected directly or via a network such as the Internet, a LAN (Local Area Network), or Bluetooth (registered trademark).

[0052] As shown in FIG. 5, in the second embodiment, the measuring device 10 includes a first measuring device 11 attached to the upper spinal column of the subject U on the back of the subject U, and a second measuring device 12 attached to the pelvis of the subject U. The second measuring device 12 is composed of an acceleration sensor capable of measuring acceleration in the up-down direction, the left-right direction, and the front-back direction, and an angular velocity sensor capable of measuring angular velocity around an axis in the up-down direction, the left-right direction, and the front-back direction. For example, a three-axis acceleration sensor, a three-axis gyro sensor, an inertial measurement device, or the like is used for the second measuring device 12. The second measuring device 12 measures the acceleration and angular velocity occurring in the pelvis of the subject U over time along the time axis while the subject U performs a predetermined task. The second measuring device 12 transmits the measured acceleration and angular velocity to the information processing device 20 as acceleration data and angular velocity data.

[0053] The calculation unit 22 calculates the jerk associated with the up-down, left-right, and front-back movements of the subject U, the posture angle associated with the forward bending, lateral bending, and rotation of the subject U, and the angular jerk associated with the forward bending, lateral bending, and rotation of the subject U, from the acceleration data and angular velocity data of the subject U acquired by the measurement device 10. Here, the jerk and angular jerk are the jerk and angular jerk of the positions of the first measurement device 11 and the second measurement device 12 worn on the subject U, i.e., the upper spine and pelvis, and the posture angle is the displacement of the Euler angles per sampling time of the positions of the first measurement device 11 and the second measurement device 12 worn on the subject U, i.e., the upper spine and pelvis.

[0054] Specifically, the jerk of the upper spinal column, the posture angle of the upper spinal column, and the angular jerk of the upper spinal column are calculated from the acceleration data and the angular velocity data of the upper spinal column of the subject U acquired by the first measuring device 11 in the same manner as in the first embodiment. Furthermore, the jerk of the pelvis is calculated by differentiating the acceleration data in three mutually orthogonal axial directions measured by the second measuring device 12 to calculate the jerk related to the up-down movement, the left-right movement, and the front-back movement. The posture angle of the pelvis is calculated by integrating the angular velocity data in three mutually orthogonal axial directions measured by the second measuring device 12 to calculate the Euler angles related to forward bending, lateral bending, and rotation, and by obtaining the displacement of the Euler angles for each sampling time, the posture angle related to forward bending, lateral bending, and rotation is calculated. The angular jerk of the pelvis is calculated by differentiating the angular velocity data measured by the second measuring device 12 to calculate the angular acceleration data related to forward bending, lateral bending, and rotation, and the angular acceleration data is further differentiated to calculate the angular jerk related to forward bending, lateral bending, and rotation.

[0055] The threshold setting unit 23 sets thresholds that are limit values ​​for each jerk, each posture angle, and each angular jerk of the subject U. Specifically, the measurement device 10 is attached to the skilled person in advance, and the acceleration and angular velocity accompanying the posture and movement of the skilled person when the skilled person performs various predetermined tasks are measured. The acceleration and angular velocity measured by the measurement device 10 are then stored in the memory unit 26 of the information processing device 20 as acceleration model data and angular velocity model data of the skilled person, separated for the upper spine and the pelvis, for each predetermined task.

[0056] The threshold setting unit 23 reads out the acceleration model data and angular velocity model data related to the predetermined task for setting the thresholds stored in the memory unit 26, and causes the calculation unit 22 to calculate each model jerk, each model posture angle, and each model angular jerk of the upper spine and pelvis, in the same manner as in the case of the subject U. Then, the threshold setting unit 23 sets the thresholds for the jerk related to the up-down movement, the left-right movement, and the front-back movement, the thresholds for the posture angles related to forward bending, lateral bending, and rotation, and the thresholds for the angular jerk related to forward bending, lateral bending, and rotation, in the same manner as in the first embodiment. At this time, in embodiment 2, the calculation unit 22 calculates each jerk of the upper spinal column and pelvic region of subject U, each posture angle of the upper spinal column and pelvic region of subject U, and each angular jerk of the upper spinal column and pelvic region of subject U, so the respective threshold values ​​that are set are the threshold value of each jerk of the upper spinal region, the threshold value of each jerk of the pelvic region, the threshold value of each posture angle of the upper spinal region, the threshold value of each posture angle of the pelvic region, the threshold value of each angular jerk of the upper spinal region, and the threshold value of each angular jerk of the pelvic region.

[0057] The evaluation unit 24 compares each jerk, each posture angle, and each angular jerk calculated by the calculation unit 22 with a preset threshold value to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold value. The evaluation unit 24 determines, for each sampling time while the subject U is performing a predetermined task, whether each jerk of the upper spine, each jerk of the pelvis, each posture angle of the upper spine, each posture angle of the pelvis, each angular jerk of the upper spine, and each angular jerk of the pelvis exceed the threshold value of each jerk, the threshold value of each posture angle, and the threshold value of each angular jerk corresponding to the predetermined task performed by the subject U, thereby evaluating the task of the subject U.

[0058] The warning device 30 operates based on the evaluation result of the evaluation unit 24. The warning device 30 issues a warning when at least one of the jerk of the upper spine, the jerk of the pelvis, the posture angle of the upper spine, the posture angle of the pelvis, the angular jerk of the upper spine, and the angular jerk of the pelvis of the subject U is equal to or greater than a threshold value. In the second embodiment, the warning device 30 has a first warning device 31 that issues a warning by sound and vibration, a second warning device 32 that issues a warning by sound and vibration, and an optical warning device 33 that issues a warning by light. The first warning device 31 and the optical warning device 33 are the same as those in the first embodiment. The second warning device 32 is, for example, a small speaker and / or a vibration generating device. The second warning device 32 is provided on the pelvis of the subject U on the back of the subject U.

[0059] In the warning device 30, when at least one of the jerks of the upper spinal column of the subject U and the angular jerks of the upper spinal column are equal to or greater than a threshold value, the first warning device 31 issues a warning by sound, and the light warning device 33 issues a warning by a first color. When at least one of the jerks of the pelvic column of the subject U and the angular jerks of the pelvic column are equal to or greater than a threshold value, the second warning device 32 issues a warning by sound, and the light warning device 33 issues a warning by a first color. When at least one of the posture angles of the upper spinal column of the subject U are equal to or greater than a threshold value, the first warning device 31 issues a warning by vibration, and the light warning device 33 issues a warning by a second color. When at least one of the posture angles of the pelvic column of the subject U are equal to or greater than a threshold value, the second warning device 32 issues a warning by vibration, and the light warning device 33 issues a warning by a second color.

[0060] Furthermore, when at least one of the jerks and angular jerks of the upper spine of the subject U and at least one of the jerks and angular jerks of the pelvis of the subject U are both equal to or greater than a threshold, the first warning device 31 and the second warning device 32 issue a warning by sound, and the light warning device 33 issues a warning by a first color. When at least one of the posture angles of the upper spine of the subject U and at least one of the posture angles of the pelvis of the subject U are both equal to or greater than a threshold, the first warning device 31 and the second warning device 32 issue a warning by vibration, and the light warning device 33 issues a warning by a second color. Furthermore, when at least one of the jerk and angular jerk of the upper spine or pelvis of the subject U and at least one of the posture angles of the upper spine or pelvis of the subject U are equal to or greater than the thresholds, the first warning device 31 or the second warning device 32 issues a warning by sound and vibration, and the light warning device 33 issues a warning by a third color. Furthermore, when at least one of the jerk and angular jerk of the upper spine of the subject U, at least one of the jerk and angular jerk of the pelvis of the subject U, at least one of the posture angles of the upper spine of the subject U, and at least one of the posture angles of the pelvis of the subject U are equal to or greater than the thresholds, the first warning device 31 and the second warning device 32 issue a warning by sound and vibration, and the light warning device 33 issues a warning by a third color.

[0061] In the second embodiment, the first measuring device 11 and the first warning device 31 are configured as an integrated small device. The second measuring device 12 and the second warning device 32 are configured as another integrated small device. The first measuring device 11 and the first warning device 31, and the second measuring device 12 and the second warning device 32 are attached to a vest or the like, and when the subject U wears the vest or the like, the first measuring device 11 and the first warning device 31 are provided on the upper spinal column of the subject U, and the second measuring device 12 and the second warning device 32 are provided on the pelvis of the subject U, as shown in FIG. 5. The information processing device 20 is configured as a server computer, and is connected to the first measuring device 11, the second measuring device 12, the first warning device 31, and the second warning device 32 via a network.

[0062] Next, a method for supporting technology transfer that evaluates the work of a subject U based on the technology transfer support system 1B will be described. Since the flowchart of the technology transfer support method of embodiment 2 is the same as that of embodiment 1, the technology transfer support method will be described with reference to Fig. 3. In the following, a technology transfer support method will be described in which the measurement device 10 measures acceleration in the up-down direction, the left-right direction, and the front-back direction, and angular velocities around axes in the up-down direction, the left-right direction, and the front-back direction to evaluate the work of a subject U.

[0063] First, before starting work, the subject U starts the technology transfer support system 1B, selects a predetermined task to be performed, and then starts the work. When the predetermined task is selected, the threshold setting unit 23 acquires acceleration model data and angular velocity model data in three mutually orthogonal axial directions related to the selected predetermined task from the storage unit 26 (S10). Then, similarly to the first embodiment, the thresholds of the jerk related to the up-down, left-right, and front-back movements of the upper spine, the thresholds of the jerk related to the up-down, left-right, and front-back movements of the pelvis, the thresholds of the posture angles related to the forward bending, lateral bending, and rotation of the upper spine, the thresholds of the posture angles related to the forward bending, lateral bending, and rotation of the pelvis, the thresholds of the angular jerk related to the forward bending, lateral bending, and rotation of the upper spine, and the thresholds of the angular jerk related to the forward bending, lateral bending, and rotation of the pelvis (S12). The set thresholds are transmitted to the evaluation unit 24.

[0064] On the other hand, when the subject U starts working, the first measuring device 11 measures the acceleration and angular velocity in three mutually perpendicular axial directions occurring in the upper spinal column of the subject U as the subject U works, and the second measuring device 12 measures the acceleration and angular velocity in three mutually perpendicular axial directions occurring in the pelvis of the subject U as the subject U works (S14). When the acceleration and angular velocity are measured by the first measuring device 11 and the second measuring device 12, the acquiring unit 21 executes a data acquiring step of acquiring the acceleration and angular velocity measured by the first measuring device 11 and the second measuring device 12 as acceleration data and angular velocity data over time for each sampling time (S16). The acquired acceleration data and angular velocity data are transmitted to the calculating unit 22.

[0065] When the calculation unit 22 receives the acceleration data and the angular velocity data, the calculation unit 22 executes a calculation step of differentiating or integrating the acceleration data and the angular velocity data of the upper spine and the pelvis to calculate the jerk related to the up-down, left-right and front-back movement of the upper spine and the pelvis, the posture angle related to the forward bending, the lateral bending and the rotation of the upper spine and the pelvis, and the angular jerk related to the forward bending, the lateral bending and the rotation of the upper spine and the pelvis (S18). Each calculated jerk, each posture angle and each angular jerk are sent to the evaluation unit 24.

[0066] When the evaluation unit 24 receives each jerk, each posture angle, each angular jerk, and the threshold, it executes an evaluation step (S20) of comparing each jerk, each posture angle, and each angular jerk with the respective threshold to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold. If at least one of the jerk, each posture angle, and each angular jerk is equal to or greater than the threshold, the evaluation unit 24 instructs the warning instruction unit 25 to issue a warning together with information on which parameter of each jerk, each posture angle, and each angular jerk is equal to or greater than the threshold.

[0067] When receiving an instruction to issue a warning from the evaluation unit 24, the warning instruction unit 25 executes a warning instruction step of instructing the first warning device 31, the second warning device 32, and the light warning device 33 to issue a warning (S22). Specifically, when any of the jerk and angular jerk of the upper spine is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 to issue a one-second sound warning and instructs the light warning device 33 to emit light in a first color. Also, when any of the jerk and angular jerk of the pelvis is equal to or greater than a threshold, the warning instruction unit 25 instructs the second warning device 32 to issue a one-second sound warning and instructs the light warning device 33 to emit light in a first color. Also, when any of the posture angles of the upper spine is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 to issue a vibration warning and instructs the light warning device 33 to emit light in a second color. Furthermore, when any of the posture angles of the pelvis are equal to or greater than the thresholds, the warning instruction unit 25 instructs the second warning device 32 to issue a warning by vibration and instructs the light warning device 33 to emit a second color. Furthermore, when any of the jerk and angular jerk of the upper spine and / or pelvis and any of the posture angles are equal to or greater than the thresholds, the warning instruction unit 25 instructs the first warning device 31 and / or the second warning device 32 to issue a one-second sound warning and a vibration warning, and instructs the light warning device 33 to emit a third color. Due to the warnings from the first warning device 31, the second warning device 32, and the light warning device 33, the subject U recognizes that his / her working posture and movement are not good.

[0068] The data acquisition step, calculation step, evaluation step, and warning instruction step are executed for each sampling time of the acceleration and angular velocity measured by the first measuring device 11 and the second warning device 12. The control unit 27 determines whether the subject U's work is continuing or has ended (S24) in the same manner as in the first embodiment, and ends the processing of the technology transfer support method when the subject U's work has ended.

[0069] [Embodiment 3] Next, a technology succession support system 1B according to a third embodiment of the present invention will be described with reference to Fig. 4 and Fig. 5. The following describes the third embodiment in terms of differences from the first and second embodiments.

[0070] The technical succession support system 1B of the embodiment 3 has a similar configuration to that of the technical succession support system 1B of the embodiment 2. As in the embodiment 2, the measurement device 10 also has a first measurement device 11 attached to the upper spinal column of the subject U on the back of the subject U, and a second measurement device 12 attached to the pelvis of the subject U.

[0071] The calculation unit 22 calculates the jerk related to the vertical movement, left and right movement, and front and rear movement of the subject U, the posture angle related to the forward bending, lateral bending, and rotation of the subject U, and the angular jerk related to the forward bending, lateral bending, and rotation of the subject U from the acceleration data and angular velocity data of the subject U acquired by the measurement device 10. In the third embodiment, the calculation unit 22 calculates each posture angle and each angular jerk of the trunk, which allows the quality of the posture and movement of the subject U during work to be evaluated more accurately. Note that the trunk is a relative angle calculated by the first measurement device 11 attached to the upper spine and the second measurement device 12 attached to the pelvis, so each jerk of the trunk cannot be calculated. Therefore, each jerk of the pelvis is used.

[0072] Specifically, Euler angles are calculated for each sampling time from the angular velocity data of the upper spine of the subject U acquired by the first measuring device 11 and the angular velocity data of the pelvis of the subject U acquired by the second measuring device 12. Then, the angle between the perpendicular line drawn vertically from the first measuring device 11 and the perpendicular line drawn vertically from the second measuring device 12 is calculated. At this time, the displacement due to the circular motion when viewed from either the left or right direction around the axis extending in the left-right direction is calculated as the posture angle of forward bending, the displacement due to the circular motion when viewed from the front around the axis extending in the front-back direction is calculated as the posture angle of side bending, and the displacement due to the circular motion when viewed from directly above around the axis extending in the up-down direction is calculated as the posture angle of rotation. The posture angles of forward bending, side bending, and rotation are differentiated three times to calculate the angular jerk of forward bending, side bending, and rotation. As in the second embodiment, the jerk is calculated from the acceleration data of the pelvis of the subject U acquired by the second measuring device 12, and is related to the up-down, left-right and front-back movement of the pelvis.

[0073] The threshold setting unit 23 sets thresholds that are limit values ​​of each jerk, each posture angle, and each angular jerk of the subject U. Specifically, the threshold setting unit 23 reads out acceleration model data and angular velocity model data related to the predetermined task for setting the thresholds stored in the storage unit 26, and causes the calculation unit 22 to calculate each model jerk, each model posture angle, and each model angular jerk in the same manner as in the case of the subject U. Then, the threshold setting unit 23 sets the thresholds for the jerk related to the up-down movement, the left-right movement, and the forward-backward movement, the thresholds for the posture angles related to forward bending, lateral bending, and rotation, and the thresholds for the angular jerk related to forward bending, lateral bending, and rotation, in the same manner as in the first embodiment. At this time, in the third embodiment, since the calculation unit 22 calculates each jerk of the pelvis of the subject U, each posture angle of the trunk of the subject U, and each angular jerk of the trunk of the subject U, the thresholds that are set are the thresholds for each jerk of the pelvis, the thresholds for each posture angle of the trunk, and the thresholds for each angular jerk of the trunk.

[0074] The evaluation unit 24 compares each jerk, each posture angle, and each angular jerk calculated by the calculation unit 22 with a preset threshold value to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold value. The evaluation unit 24 determines, for each sampling time while the subject U is performing a predetermined task, whether each jerk of the pelvis, each posture angle, and each angular jerk of the trunk of the subject U exceeds the threshold value of each jerk, each posture angle, and each angular jerk corresponding to the predetermined task performed by the subject U, thereby evaluating the task of the subject U.

[0075] The warning device 30 operates based on the evaluation result of the evaluation unit 24. The warning device 30 issues a warning when at least one of each jerk of the pelvis, each posture angle of the trunk, and each angular jerk of the trunk of the subject U becomes equal to or greater than a threshold value. In the third embodiment, the warning device 30 has a first warning device 31 that issues a warning by sound and vibration, a second warning device 32 that issues a warning by sound and vibration, and an optical warning device 33 that issues a warning by light. The first warning device 31, the second warning device 32, and the optical warning device 33 are the same as those in the second embodiment. In the third embodiment, the warning device 30 can be configured to include either the first warning device 31 or the second warning device 32. In the following description, the first warning device 31 and the second warning device 32 are included, but when only one of the first warning device 31 or the second warning device 32 is included, the included warning device 31, 32 issues a warning.

[0076] When at least one of the jerk and angular jerk of the subject U is equal to or greater than a threshold, the first warning device 31 and / or the second warning device 32 issue a warning by sound, and the optical warning device 33 issues a warning by a first color. When at least one of the posture angles of the subject U is equal to or greater than a threshold, the first warning device 31 and / or the second warning device 32 issue a warning by vibration, and the optical warning device 33 issues a warning by a second color. When at least one of the jerk and angular jerk of the subject U and at least one of the posture angles of the subject U are both equal to or greater than a threshold, the first warning device 31 and / or the second warning device 32 issue a warning by sound and vibration, and the optical warning device 33 issues a warning by a third color.

[0077] In the third embodiment, the first measuring device 11 and the first warning device 31 are configured as an integrated small device. The second measuring device 12 and the second warning device 32 are configured as another integrated small device. The first measuring device 11 and the first warning device 31, and the second measuring device 12 and the second warning device 32 are attached to a vest or the like, and when the subject U wears the vest or the like, the first measuring device 11 and the first warning device 31 are provided at the upper spinal column of the subject U, and the second measuring device 12 and the second warning device 32 are provided at the pelvic region of the subject U, as shown in FIG. 5. In addition, when the first warning device 31 is not provided, the first measuring device 11 is configured as an integrated small device, and the second measuring device 12 and the second warning device 32 are configured as another integrated small device. In addition, when the second warning device 31 is not provided, the first measuring device 11 and the first warning device 31 are configured as an integrated small device, and the second measuring device 12 is configured as another integrated small device. The information processing device 20 is configured as a server computer, and is connected to the first measuring device 11, the second measuring device 12, the first warning device 31, and the second warning device 32 via a network.

[0078] Next, a method for supporting technology transfer that evaluates the work of a subject U based on the technology transfer support system 1B will be described. Since the flowchart of the technology transfer support method of embodiment 3 is the same as that of embodiment 1, the technology transfer support method will be described with reference to Fig. 3. In the following, a technology transfer support method will be described in which the measurement device 10 measures acceleration in the up-down direction, the left-right direction, and the front-back direction, and angular velocities around axes in the up-down direction, the left-right direction, and the front-back direction to evaluate the work of a subject U.

[0079] First, before starting work, the subject U starts the technology transfer support system 1B, selects the predetermined work to be performed, and then starts the work. When the predetermined work is selected, the threshold setting unit 23 acquires the acceleration model data and the angular velocity model data of three mutually orthogonal axial directions related to the selected predetermined work from the storage unit 26 (S10). Then, as in the first embodiment, the thresholds of the jerk related to the up-down movement, the left-right movement, and the front-back movement of the pelvis, the thresholds of the posture angles related to the forward bending, the lateral bending, and the rotation of the trunk, and the thresholds of the angular jerk related to the forward bending, the lateral bending, and the rotation of the trunk are set (S12). The set thresholds are transmitted to the evaluation unit 24.

[0080] On the other hand, when the subject U starts working, the first measuring device 11 measures the acceleration and angular velocity in three mutually orthogonal axial directions occurring in the upper spinal column of the subject U as the subject U works, and the second measuring device 12 measures the acceleration and angular velocity in three mutually orthogonal axial directions occurring in the pelvic region of the subject U as the subject U works (S14). When the acceleration and angular velocity are measured by the first measuring device 11 and the second measuring device 12, the acquiring unit 21 executes a data acquiring step of acquiring the acceleration and angular velocity measured by the first measuring device 11 and the second measuring device 12 as acceleration data and angular velocity data over time for each sampling time (S16). The acquired acceleration data and angular velocity data are transmitted to the calculating unit 22.

[0081] When the calculation unit 22 receives the acceleration data and the angular velocity data, it executes a calculation step of differentiating the acceleration data of the pelvis to calculate the jerk related to the up-down, left-right, and front-back movement of the pelvis, and calculating the posture angle related to the forward bending, lateral bending, and rotation of the trunk, and the angular jerk related to the forward bending, lateral bending, and rotation of the trunk from the angular velocity data of the upper spine and the pelvis (S18). Each calculated jerk, posture angle, and angular jerk are sent to the evaluation unit 24.

[0082] When the evaluation unit 24 receives each jerk, each posture angle, each angular jerk, and the threshold, it executes an evaluation step (S20) of comparing each jerk, each posture angle, and each angular jerk with the respective threshold to evaluate whether each jerk, each posture angle, and each angular jerk of the subject U is equal to or greater than the threshold. If at least one of the jerk, each posture angle, and each angular jerk is equal to or greater than the threshold, the evaluation unit 24 instructs the warning instruction unit 25 to issue a warning together with information on which parameter of each jerk, each posture angle, and each angular jerk is equal to or greater than the threshold.

[0083] Upon receiving an instruction to issue a warning from the evaluation unit 24, the warning instruction unit 25 executes a warning instruction step of instructing the first warning device 31, the second warning device 32, and the optical warning device 33 to issue a warning (S22). Specifically, when any of the jerk and angular jerk is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 and / or the second warning device 32 to issue a one-second sound warning and instructs the optical warning device 33 to emit light in the first color. In addition, when any of the posture angles is equal to or greater than a threshold, the warning instruction unit 25 instructs the first warning device 31 and / or the second warning device 32 to issue a vibration warning and instructs the optical warning device 33 to emit light in the second color. Furthermore, when any one of the jerk and angular jerk and any one of the posture angles are both equal to or greater than the threshold, the warning instruction unit 25 instructs the first warning device 31 and / or the second warning device 32 to issue a one-second sound warning and a vibration warning, and instructs the optical warning device 33 to emit a third color. Due to the warnings from the first warning device 31, the second warning device 32, and the optical warning device 33, the subject U recognizes that his or her working posture and movement are not good.

[0084] The data acquisition step, calculation step, evaluation step, and warning instruction step are executed for each sampling time of the acceleration and angular velocity measured by the first measuring device 11 and the second warning device 12. The control unit 27 determines whether the subject U's work is continuing or has ended (S24) in the same manner as in the first embodiment, and ends the processing of the technology transfer support method when the subject U's work has ended.

[0085] Next, a modified example of the technical succession support system 1B of the embodiment 3 will be described. The technical succession support system 1B of the modified example of the embodiment 3 has the same configuration as the technical succession support system 1B of the embodiment 3. The technical succession support system 1B of the modified example of the embodiment 3 is different from the technical succession support system 1B of the embodiment 3 in that each jerk of the upper spine and each jerk of the pelvis are used when evaluating the work of the subject U.

[0086] That is, as shown in the above-mentioned embodiment 3, the calculation unit 22 calculates each posture angle of the trunk and each angular jerk of the trunk from the angular velocity data of the upper spine and the angular velocity data of the pelvis of the subject U acquired by the first measuring device 11 and the second measuring device 12. In addition, the calculation unit 22 calculates the jerk related to the up-down movement, left-right movement, and front-back movement of the upper spine from the acceleration data of the subject U acquired by the first measuring device 11, and calculates the jerk related to the up-down movement, left-right movement, and front-back movement of the pelvis from the acceleration data of the subject U acquired by the second measuring device 12.

[0087] The threshold setting unit 23 sets a threshold for each jerk of the upper spine, a threshold for each jerk of the pelvis, a threshold for each posture angle of the trunk, and a threshold for each angular jerk of the trunk of the subject U, in the same manner as in the second and third embodiments. Then, the evaluation unit 24 judges whether each jerk of the upper spine, each jerk of the pelvis, each posture angle of the trunk, and each angular jerk of the trunk of the subject U exceed the threshold for each jerk, each posture angle, and each angular jerk corresponding to a predetermined task performed by the subject U, and evaluates the task of the subject U.

[0088] When the warning device 30 includes the first warning device 31 and the second warning device 32, as in the second embodiment, when at least one of the jerks of the upper spine of the subject U becomes equal to or above a threshold, the first warning device 31 issues a warning by sound, and when at least one of the jerks of the pelvis of the subject U becomes equal to or above a threshold, the second warning device 32 issues a warning by sound. Also, when at least one of the jerks of the upper spine of the subject U and at least one of the jerks of the pelvis of the subject U both become equal to or above a threshold, the first warning device 31 and the second warning device 32 issue a warning by sound. With this configuration, the subject U can be made aware of whether the upper spine or the pelvis is equal to or above a threshold.

[0089] Furthermore, when the warning device 30 is equipped with either the first warning device 31 or the second warning device 32, the warning device 30 issues a warning by sound when at least one of the jerk of the upper spine and the jerk of the pelvis of the subject U becomes equal to or greater than a threshold. Similarly, the warning device 30 issues a warning by sound when at least one of the jerk of the upper spine and at least one of the jerk of the pelvis of the subject U both become equal to or greater than a threshold. Other operations of the warning device 30 for issuing a warning are the same as those in the third embodiment. EXAMPLES

[0090] Next, the technology succession support system 1A, 1B according to the first or third embodiment will be specifically described with reference to examples.

[0091] <Example 1> In Example 1, it is confirmed how a predetermined task performed by a subject U who is unfamiliar with the task is evaluated using the technology transfer support system 1A of the embodiment 1. In Example 1, the evaluation of the task of assisting with undressing in a toilet is confirmed.

[0092] The experts have 10 years or more of work experience. The average values ​​of the three experts performing the work are used as the acceleration model data and angular velocity model data of the experts. Subjects 1 to 3 are beginners with no work experience at all.

[0093] The subjects 1 to 3 wear the measuring device 10 of the technology transfer support system 1A and perform a predetermined task. While performing the predetermined task, the respective jerks, respective posture angles, and respective angular jerks are calculated as shown in the above-mentioned embodiment 1. The calculation results of the respective jerks, respective posture angles, and respective angular jerks are shown in Figs. 6 to 14. Fig. 6 is a graph showing the evaluation result of the jerk of the up-down movement of the upper spine in Example 1. Fig. 7 is a graph showing the evaluation result of the jerk of the left-right movement of the upper spine in Example 1. Fig. 8 is a graph showing the evaluation result of the jerk of the forward-backward movement of the upper spine in Example 1. Fig. 9 is a graph showing the evaluation result of the posture angle of the forward bending of the upper spine in Example 1. Fig. 10 is a graph showing the evaluation result of the posture angle of the lateral bending of the upper spine in Example 1. Fig. 11 is a graph showing the evaluation result of the posture angle of the rotation of the upper spine in Example 1. Fig. 12 is a graph showing the evaluation result of the angular jerk of the forward bending movement of the upper spine in Example 1. FIG. 13 is a graph showing the evaluation results of the angular jerk of the lateral bending movement of the upper spine in Example 1. FIG. 14 is a graph showing the evaluation results of the angular jerk of the rotational movement of the upper spine in Example 1. In FIG. 6 to FIG. 14, the threshold is shown by a horizontally extending dashed line. In FIG. 6 to FIG. 8 and FIG. 12 to FIG. 14, the data of each subject and the expert is shown by a black solid line or dashed line, and the area obtained by adding / subtracting the standard deviation from the average of the expert's data is shown by a gray area on the expert's graph. In FIG. 9 to FIG. 11, the data of each subject is shown by a black solid line, the data of the expert is shown by a gray dashed line, and the area obtained by adding / subtracting the standard deviation from the average of the expert's data is shown by a gray area.

[0094] 6 to 14, it can be seen that there are times when the threshold value is exceeded for each jerk and each angular jerk during the series of tasks, and that there are times when the subjects 1 to 3 do not move smoothly compared to the skilled worker. In addition, it can be seen that the threshold value is exceeded for each posture angle for most of the time during the series of tasks, and that the subjects 1 to 3 take unnatural postures compared to the skilled worker. In this way, since it can be evaluated that the movements are not smooth and that the subjects take unnatural postures, a warning is issued at the time of the unsmooth movements and the time of the unnatural postures, so that the subjects 1 to 3 can recognize at which point in the work they are taking unnatural postures and distorted movements. Then, the subjects 1 to 3 can review their own work techniques and bring their work techniques closer to those of the skilled worker.

[0095] <Example 2> In Example 2, using the technology transfer support system 1B of the third embodiment, it is confirmed how a predetermined task performed by a subject U who is unfamiliar with the task is evaluated. In Example 2, the evaluation when the subject U performs the task of assisting with undressing in a toilet is also confirmed. The skilled person and subjects 1 to 3 are the same as in Example 1.

[0096] The subjects 1 to 3 wear the measuring device 10 of the technology transfer support system 1B and perform a predetermined task. While performing the predetermined task, the respective jerks, respective posture angles, and respective angular jerks are calculated as shown in the above-mentioned embodiment 3. The calculation results of the respective jerks, respective posture angles, and respective angular jerks are shown in Figs. 15 to 23. Fig. 15 is a graph showing the evaluation result of the jerk of the vertical movement of the pelvis in Example 2. Fig. 16 is a graph showing the evaluation result of the jerk of the left-right movement of the pelvis in Example 2. Fig. 17 is a graph showing the evaluation result of the jerk of the forward-backward movement of the pelvis in Example 2. Fig. 18 is a graph showing the evaluation result of the posture angle of the forward bending of the trunk in Example 2. Fig. 19 is a graph showing the evaluation result of the posture angle of the lateral bending of the trunk in Example 2. Fig. 20 is a graph showing the evaluation result of the posture angle of the rotation of the trunk in Example 2. Fig. 21 is a graph showing the evaluation result of the angular jerk of the forward bending movement of the trunk in Example 2. FIG. 22 is a graph showing the evaluation results of the angular jerk of the lateral flexion of the trunk in Example 2. FIG. 23 is a graph showing the evaluation results of the angular jerk of the rotational movement of the trunk in Example 2. In FIG. 15 to FIG. 23, the threshold is shown by a horizontally extending dashed line. In FIG. 15 to FIG. 17 and FIG. 21 to FIG. 23, the data of each subject and the expert is shown by a black solid line or dashed line, and the area obtained by adding / subtracting the standard deviation from the average of the expert data is shown by a gray area on the graph of the expert. In FIG. 18 to FIG. 20, the data of each subject is shown by a black solid line, the data of the expert is shown by a gray dashed line, and the area obtained by adding / subtracting the standard deviation from the average of the expert data is shown by a gray area.

[0097] 15 to 23, it can be seen that there are times when the threshold value is exceeded for each jerk and each angular jerk during the series of tasks, and that there are times when subjects 1 to 3 do not move smoothly compared to the skilled worker. In addition, it can be seen that the threshold value is exceeded for each posture angle for most of the time during the series of tasks, and that subjects 1 to 3 take unnatural postures compared to the skilled worker. In this way, since it can be evaluated that the movements are not smooth and that they take unnatural postures, a warning is issued at the time of the unsmooth movements and the time of the unnatural postures, so that subjects 1 to 3 can recognize at which point in the work they are taking unnatural postures and distorted movements. Then, subjects 1 to 3 can review their own work techniques and bring their work techniques closer to those of the skilled worker.

[0098] Furthermore, comparing Example 1 in which the evaluation is performed using each jerk of the upper spine with Example 2 in which the evaluation is performed using each jerk of the pelvis, as can be seen from Figs. 6 to 8 showing each jerk of the upper spine and Figs. 15 to 18 showing each jerk of the pelvis, it can be confirmed that the jerk of the pelvis of Subjects 1 to 3 is significantly different from that of an expert. From this, it can be seen that by using each jerk of the pelvis, it is possible to evaluate an unsmooth movement with higher accuracy. In this way, the acceleration data and angular velocity data of the upper spine also reflect the posture and movement of the trunk, but the acceleration data and angular velocity data of the pelvis can more accurately evaluate the trunk, which is more directly affected by the posture and movement of the limbs and the lower back, so that it is possible to more quickly improve the movement of an unskilled person who is the focus of attention in a work accident and provide appropriate guidance. From these points of view, it can be said that the embodiments 2 and 3 equipped with the first measuring device 11 and the second measuring device 12 have higher accuracy and are more desirable embodiments in evaluating the work of the subject U than the embodiment 1 equipped with only the first measuring device 11.

[0099] As described above, in the technology transfer support system 1A, 1B of the present invention, the jerk, posture angle, and angular jerk in three mutually orthogonal axial directions are calculated from the measured acceleration and angular velocity, and the work of the worker (subject U) is evaluated by comparing them with the jerk, posture angle, and angular jerk in three mutually orthogonal axial directions of the expert. By evaluating the jerk and angular jerk, the smoothness of the movement can be judged, and the burden on the worker's body can be reduced by smoothly performing a series of movements of a predetermined work. At the same time, by evaluating the posture angle, it can be judged whether an unreasonable posture is taken, and the burden on the worker's body can be reduced by preventing the worker from taking an unreasonable posture during the predetermined work. These evaluations are performed in comparison with thresholds based on the work skills of the expert, so that the worker's body is prevented from being injured and the worker can learn the work skills of the expert that are less burdensome to the body.

[0100] In addition, in the technology transfer support system 1A, 1B of the present invention, a warning is issued when at least one of each jerk, each posture angle, and each angular jerk exceeds a threshold value. This allows the worker to easily recognize which part of his or her work is different from that of an expert and is putting a strain on the body.

[0101] Moreover, in the technology transfer support system 1B of the second and third embodiments, the second measuring device 12 is provided not only in the upper spine but also in the pelvis. In this way, by measuring the posture and movement of the subject U during work using the measuring devices 10 provided in two places, the amount of acceleration data and angular velocity data that can be acquired is increased, and the subject U's work can be evaluated with higher accuracy than the technology transfer support system 1A of the first embodiment in which the measuring device 10 is provided in one place in the upper spine. In particular, in the technology transfer support system 1B of the third embodiment, the subject U's work is evaluated based on the posture and movement of the subject U's trunk, so that the subject U's work can be evaluated with even higher accuracy.

[0102] In addition, in the technology transfer support system 1B of the third embodiment, there is a method of evaluation using each jerk of the pelvis shown in the third embodiment, and a method of evaluation using each jerk of the upper spine and the pelvis shown in the modified example. The upper spine and the pelvis move in tandem but move separately, so by using each jerk of both the upper spine and the pelvis, the subject U's work can be accurately evaluated. On the other hand, from the viewpoint of the subject U correcting his / her posture and movement, it is easier for the subject U to recognize the evaluation of only the pelvis. Also, from the viewpoint of the trunk evaluation, the evaluation using each jerk of the pelvis is more in line with the trunk evaluation than the evaluation using each jerk of the upper spine. From these points of view, the technology transfer support system 1B can be obtained by using only each jerk of the pelvis, which can highly accurately evaluate the work of the subject U, while also allowing the subject U to easily review his / her posture and movement.

[0103] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0104] For example, in the above embodiment, the calculation unit 22 calculates each jerk, each posture angle, and each angular jerk of the subject U, but the present invention does not necessarily have to be configured in this way. In other words, since each jerk and each angular jerk are used as an index indicating the smoothness of a movement, the calculation unit 22 may be configured to calculate either a jerk related to the up-down movement, left-right movement, and front-back movement of the subject U, or an angular jerk related to the forward bending movement, lateral bending movement, and rotational movement of the subject U. At this time, the evaluation unit 24 compares each jerk or each angular jerk of the subject U and each posture angle of the subject U with the respective threshold values ​​to evaluate the work of the subject U.

[0105] In the above embodiment, the information processing device 20 includes the threshold setting unit 23, but the present invention does not necessarily have to have this configuration. For example, the information processing device 20 does not need to include the threshold setting unit 23 as long as the thresholds of each jerk, each posture angle, and each angular jerk for each predetermined task are stored in the memory unit 26. In this case, the evaluation unit 24 does not acquire the threshold from the threshold setting unit 23, but rather reads out and acquires the threshold for the predetermined task from the memory unit 26 when the subject U sets the predetermined task.

[0106] Furthermore, in the above embodiment, the warning device 30 has the optical warning device 33, but the present invention does not necessarily have to have this configuration. For example, the warning device 30 does not have to have the optical warning device 33. If the optical warning device 33 is not provided, there is no need for space to install the optical warning device 33, and the technology transfer support systems 1A, 1B can be used even when working in a small space.

[0107] In the above embodiment, the information processing device 20 is configured as a server computer and is connected to the measuring device 10 and the warning device 30 via a network, but the present invention does not necessarily have to be configured in this way. For example, the information processing device 20 may be configured as a small device integrated with the measuring device 10 and the warning device 30. That is, in the above embodiment 1, the first measuring device 11, the information processing device 20, and the first warning device 31 are configured as an integrated small device. In addition, in the above embodiments 2 and 3, the first measuring device 11, the information processing device 20, and the first warning device 31 are configured as an integrated small device, or the second measuring device 12, the information processing device 20, and the second warning device 32 are configured as an integrated small device. At this time, the measuring device 10 and the warning device 30 that are not configured as an integrated small device with the information processing device 20 are connected to the information processing device 20 via a network.

[0108] In the above embodiment, the measuring device 10 has the first measuring device 11 and the second measuring device 12 each composed of an acceleration sensor and an angular velocity sensor, but the present invention does not necessarily have to have this configuration. For example, the measuring device 10 may be composed of an imaging device capable of photographing the upper body of the subject. In this case, the coordinates of three mutually orthogonal axial directions associated with the posture and movement of the subject during work are measured by analyzing the image captured by the imaging device. That is, the measuring device 10 only needs to be able to measure values ​​(acceleration and angular velocity, or coordinates) indicating the posture of the subject U associated with the posture and movement of the subject U during work, and values ​​indicating the movement of the subject U.

[0109] When the measuring device 10 is configured by an imaging device as described above, the coordinates of the subject U measured by the measuring device 10 are transmitted to the information processing device 20 as coordinate data. The information processing device 20 evaluates the work of the subject U based on the coordinate data of the subject U. Specifically, the calculation unit 22 calculates the acceleration and angular velocity from the displacement of the coordinate data at each sampling time, and calculates the jerk and angular jerk as in the above embodiment. The posture angle is calculated based on the relative positional relationship from the coordinate data. At this time, the threshold is set based on the coordinate model data of the skilled person in three mutually orthogonal axis directions.

[0110] Furthermore, the transfer of skills involving physical movements can only be achieved by improving the movements in an environment in which the skills are actually provided. Therefore, it is important to measure the model data of the skilled worker in the actual situation and space in which the unskilled worker needs instruction. For example, in the case of nursing care work, the work space differs from one business to another, and even in the same business, the space of the toilet and the position of the toilet bowl differ. Therefore, it is necessary to obtain the model data of the skilled worker under the conditions of the space in which the unskilled worker is engaged in the work, or the space in which the practical training or training is performed, and to evaluate the work of the unskilled worker based on the model data of the skilled worker. Therefore, it is necessary to identify which predetermined work the subject U will perform. Here, in the above embodiment, the subject U selects which predetermined work to perform before starting the work, but the present invention does not necessarily have to be configured in this way. For example, the technology transfer support system 1A, 1B may be equipped with a small camera, which grasps the environment around the subject U, and automatically selects the predetermined work by using image recognition or AI to determine what work the subject U will perform next.

[0111] In the above embodiment, when the threshold setting unit 23 sets the thresholds for each jerk, each posture angle, and each angular jerk, the threshold setting unit 23 sets the thresholds by adding a standard deviation to the maximum value of each model jerk, each model posture angle, and each model angular jerk of a series of work by an expert, but the present invention does not necessarily have to be configured in this way. For example, in the case of work in which the time course and work content are somewhat common even if different workers are used, the thresholds may be set by adding a standard deviation to each model jerk, each model posture angle, and each model angular jerk of an expert for each sampling time. At this time, the evaluation unit 24 compares the thresholds set differently for each sampling time with each jerk, each posture angle, and each angular jerk of the subject U at the same sampling time to evaluate the work of the subject U. [Explanation of symbols]

[0112] 1A,1B Technology succession support system 10. Measurement Equipment 11 First measuring device 12 Second measurement device 20 Information processing device 22 Calculation section 24 Evaluation Section 25 Warning instruction section 30 Warning device U Target Audience

Claims

1. At least one measuring device that measures acceleration and angular velocity in three mutually orthogonal axial directions or coordinates in three mutually orthogonal axial directions associated with the posture and movement of the subject during work; and an information processing device that evaluates the subject's work based on the acceleration data and angular velocity data of the subject or the subject's coordinate data acquired by the measurement device, The information processing device has a calculation unit that calculates at least one of a jerk related to up-down movement, left-right movement, and forward-backward movement, and an angular jerk related to forward bending, lateral bending, and rotation, and a posture angle related to forward bending, lateral bending, and rotation from the acceleration data and angular velocity data of the subject acquired by the measurement device, or the coordinate data of the subject, and an evaluation unit that compares at least one of the jerk and angular jerk, and each posture angle calculated by the calculation unit with a preset threshold value, and evaluates whether or not at least one of the jerk and angular jerk of the subject, and each posture angle is equal to or greater than the threshold value, A technology transfer support system in which the threshold value is set based on at least one of the model jerk related to up-down movement, left-right movement, and forward-back movement, and the model angular jerk related to forward bending, lateral bending, and rotational movement, and the model posture angle related to forward bending, lateral bending, and rotational movement, which are calculated by the calculation unit from the acceleration model data and angular velocity model data in three mutually perpendicular axial directions associated with the posture and movement of the skilled worker when performing a specified task, obtained by the measuring device, or the coordinate model data in three mutually perpendicular axial directions.

2. 2. The technology transfer support system according to claim 1, wherein the measurement device includes a first measurement device attached to an upper spinal column of the subject and configured to measure acceleration and angular velocity in three mutually perpendicular axial directions.

3. 3. The technology transfer support system according to claim 2, wherein the measurement device further comprises a second measurement device attached to a pelvis of the subject and configured to measure acceleration and angular velocity in three mutually perpendicular axial directions.

4. a warning device that operates based on the evaluation result of the evaluation unit, the information processing device further includes a warning instruction unit that instructs the warning device to issue a warning based on an evaluation result of the evaluation unit; The warning instruction unit instructs to issue a warning when at least one of each jerk and each angular jerk of the subject and at least one of each posture angle are equal to or greater than the threshold value; The technical transfer support system of claim 1, wherein the warning device issues different warnings when at least one of the subject's jerks and angular jerks is above the threshold and when at least one of the subject's posture angles is above the threshold.

5. The technical transfer support system of claim 4, wherein the warning device issues an audible warning when at least one of the subject's jerk and angular jerk is above the threshold, and issues a vibration warning when at least one of the subject's posture angles is above the threshold.

6. 6. The technology transfer system according to claim 5, wherein the warning device issues a warning by light.

7. a data acquisition step of acquiring acceleration data and angular velocity data in three mutually orthogonal axial directions or coordinate data in three mutually orthogonal axial directions associated with the posture and movement of the subject during work, the data being measured by a measurement device; a calculation step of calculating at least one of the jerk related to the vertical movement, the lateral movement, and the forward / backward movement, and the angular jerk related to the forward bending, the lateral bending, and the rotation, and the posture angle related to the forward bending, the lateral bending, and the rotation from the acquired acceleration data and angular velocity data of the subject, or the coordinate data of the subject; and an evaluation step of comparing at least one of the calculated jerks and angular jerks, and at least one of the calculated posture angles with a preset threshold value to evaluate whether or not at least one of the jerks and angular jerks, and at least one of the calculated posture angles of the subject are equal to or greater than the threshold value; A method for supporting skill transfer, in which the threshold value is set based on at least one of model jerk related to up-down movement, left-right movement, and front-back movement, and model angular jerk related to forward bending, lateral bending, and rotation, and model posture angles related to forward bending, lateral bending, and rotation, calculated from acceleration model data and angular velocity model data in three mutually perpendicular axial directions, or coordinate model data in three mutually perpendicular axial directions, associated with the posture and movement of a skilled worker when performing a specified task, obtained by the measuring device.

8. a data acquisition step of acquiring acceleration data and angular velocity data in three mutually orthogonal axial directions or coordinate data in three mutually orthogonal axial directions associated with the posture and movement of the subject during work, the data being measured by a measurement device; a calculation step of calculating at least one of the jerk related to the vertical movement, the lateral movement, and the forward / backward movement, and the angular jerk related to the forward bending, the lateral bending, and the rotation, and the posture angle related to the forward bending, the lateral bending, and the rotation from the acquired acceleration data and angular velocity data of the subject, or the coordinate data of the subject; an evaluation step of comparing at least one of the calculated jerks and angular jerks, and at least one of the calculated posture angles with a preset threshold value to evaluate whether or not at least one of the jerks and angular jerks, and at least one of the posture angles of the subject are equal to or greater than the threshold value; A skill transfer support program in which the threshold value is set based on at least one of the model jerk related to up-down movement, left-right movement, and forward-back movement, and the model angular jerk related to forward bending, lateral bending, and rotation, and the model posture angle related to forward bending, lateral bending, and rotation, calculated from the acceleration model data and angular velocity model data in three mutually perpendicular axial directions associated with the posture and movement of the skilled worker when performing a specified task obtained by the measuring device, or the coordinate model data in three mutually perpendicular axial directions.

Images