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A bidirectional load applicator for the investigation of skin response to mechanical stress
- Source :
- IEEE Transactions on Biomedical Engineering. 44:290-296
- Publication Year :
- 1997
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 1997.
-
Abstract
- Instrumentation was developed to apply controlled biaxial (normal and shear) forces to the skin of a human or animal subject. The instrument mimicked any reference waveform within the constraints of a bandwidth of 15 Hz, a maximum force of 20 N, and displacement ranges of 15 mm for the normal direction and 18 mm for the shear direction. Two shaker motors, positioned with their axes parallel, were used with a low effective mass linkage and small-angle rotational joints to deliver the force. A digital feedback controller independently controlled the instantaneous normal and shear forces and recorded the resultant displacements. Evaluations on human and animal (pig) subjects demonstrated mean absolute errors between the applied and reference waveforms of less than 1.2% full-scale output for both the normal and shear directions. No degradation in performance was apparent over the course of a 1-h loading session. The instrument is to be used for the investigation of skin adaptation to mechanical stress, information that could be used to design new therapeutic methods to encourage skin load-tolerance.
- Subjects :
- Materials science
Normal force
Swine
business.industry
Transducers
Shear force
Biomedical Engineering
Biaxial tensile test
Structural engineering
Wrist
Elasticity
Weight-Bearing
Stress (mechanics)
Forearm
Transducer
Reference Values
Skin Physiological Phenomena
Animals
Humans
Waveform
Stress, Mechanical
Shaker
business
Normal
Analog-Digital Conversion
Subjects
Details
- ISSN :
- 00189294
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Biomedical Engineering
- Accession number :
- edsair.doi.dedup.....6761a1893da89d8d260df97c71ff36a6