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A sensorless mechanism for shearing force measurement.

Development of shearing force measurement and feedback mechanism by using a linear actuator.
-The automation of nursing care sites

User:Igarashi Laboratory in Tokyo Denki University


Kubota laboratry HP :http://www.crl.epi.dendai.ac.jp/
Outline of this research :Click here



Excerpts from the outline of the research

The onset of low back pain in long-term care workers is remarkable, and 55.6% of the nursing care workers who have symptoms develop low back pain within 2 years after the long-term care work.
These factors include moving assistance and repositioning for care-receiver.
In actual long-term care, it is said that it is necessary to change the position for care-deceiver once every four hours using pressure-dispersing bedding.
However, it is difficult to give nursing and judge the risk of pressure ulcer propery unless the person is a nurse, care manager, or other knowledgeable person.
It is possible to measure the force according to each person with this mechanism, so it becomes possible to prevent pressure ulcers by changing the position.
Ultimately, we believe that by providing feedback while measuring shear force and pressure, we can expect automation of nursing care that requires specialized knowledge.

Main adopted motor

  Model name Product name Remarks
1

MDH-7018-648KE

Small-sized hollow direct drive motor

Outer diameter φ70mm、Hollow diameter φ25mm

Resolution 2,592,000C/R
Max torque 3Nm

By using a μDD motor, force measurement is possible without a force sensor.