Motion assist system and management device

1. A motion assist system comprising:

a plurality of assist devices put on a plurality of assist target persons performing an assist target operation such that the assist devices assist respective motions of assist target body parts of the assist target persons; and

a management device configured to manage the assist devices, wherein:

each of the assist devices includes

a power portion configured to generate power that assists the motion of the assist target body part,

a current measuring portion configured to measure a driving current supplied to the power portion,

a communication portion communicable with the management device, and

a control device configured to transmit motion information of the power portion based on a value of the driving current measured by the current measuring portion to the management device via the communication portion;

the management device is configured to generate overall information that unifies working states of the assist target persons based on pieces of motion information obtained from the assist devices and to present at least part of the overall information to the assist target persons or an administrator,

the management device is configured to estimate a progress status of the assist target operation by comparing a number of times that an assist target person of the plurality of assist target persons performs the assist target operation to a predetermined target operation number, the number of times that the assist target person of the plurality of assist target persons performs the assist target operation being determined based on the motion information,

the management device is configured to evaluate a working posture of the assist target person of the plurality of assist target persons by comparing a received current waveform of the driving current with a reference current waveform acquired in advance, and evaluate a level of skill of the assist target person of the plurality of assist target persons based on the evaluated working posture, and

the management device is configured to estimate a fatigue degree of the assist target person based on the number of times that the assist target person of the plurality of assist target persons performs the assist target operation.

2. The motion assist system according to claim 1 , wherein the control device is configured to count the number of times that the assist target operation is performed and to transmit, to the management device, the counted number of times that the assist target operation is performed, as the motion information.

3. The motion assist system according to claim 1 , wherein:

the management device is configured to transmit an alert signal for a warning or an instruction to the assist device; and

the assist device includes a notification portion configured to notify the assist target person that the alert signal is received, when the alert signal is received.

4. The motion assist system according to claim 1 , further comprising antennas configured to acquire positional information of the plurality of assist devices.

5. A management device for managing a plurality of assist devices put on a plurality of assist target persons performing an assist target operation, the assist devices being each configured to transmit, to the management device, motion information of a power portion configured to generate power that assists a motion of an assist target body part of a corresponding one of the assist target persons, the motion information being based on a value of a measured driving current supplied to the power portion, the management device comprising:

a processor,

wherein the processor is configured to generate overall information that unifies working states of the assist target persons based on pieces of motion information obtained from the assist devices and to present at least part of the overall information to the assist target persons or an administrator,

wherein the processor is configured to estimate a progress status of the assist target operation by comparing a number of times that an assist target person of the plurality of assist target persons performs the assist target operation to a predetermined target operation number, the number of times that the assist target person of the plurality of assist target persons performs the assist target operation being determined based on the motion information,

wherein the processor is configured to evaluate a working posture of the assist target person of the plurality of assist target persons by comparing a received current waveform of the driving current with a reference current waveform acquired in advance, and evaluate a level of skill of the assist target person of the plurality of assist target persons based on the evaluated working posture, and

the processor is configured to estimate a fatigue degree of the assist target person based on the number of times that the assist target person of the plurality of assist target persons performs the assist target operation.

6. The management device according to claim 5 , wherein the processor is configured to transmit an alert signal for a warning or an instruction to the assist devices.