| A pneumatic bladder array for measuring dynamic interface pressure between seated users and their wheelchairs. | |
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MedLine Citation:
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PMID: 2065148 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An understanding of the dynamic pressure distribution changes that take place on the sitting surface of a wheelchair while one propels oneself on a level surface may influence the design of wheelchair seat cushions engineered to minimize pressure sores in wheelchair users. A pneumatic pressure transducer array and associated multiplexer were developed to permit measurement of dynamic interfacial pressure changes on the seated wheelchair user during short bursts of locomotion on a level surface. The system design, calibration and interface to an IBM PC computer are described. Each transducer element consists of a 0.7" thick x 1.25" diameter bladder innervated by a miniature piezoresistive pressure transducer. Fifty elements make up the array covering a 7.5" x 15" area. The 50 differential outputs were multiplexed with six 16 to one CMOS analog switches and one 4-channel differential CMOS analog switch. A Keithley 570 data acquisition system was utilized. Frequency response, effect of normal loading and effect of shear loading on a single transducer element are discussed. |
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Authors:
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K M Eckrich |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biomedical sciences instrumentation Volume: 27 ISSN: 0067-8856 ISO Abbreviation: Biomed Sci Instrum Publication Date: 1991 |
Date Detail:
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Created Date: 1991-08-09 Completed Date: 1991-08-09 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0140524 Medline TA: Biomed Sci Instrum Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 135-40 Citation Subset: IM |
Affiliation:
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Biomedical Engineering Dept., Iowa State University, Ames 50011. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analog-Digital Conversion Calibration Equipment Design Humans Manometry* Microcomputers Pressure Ulcer / prevention & control* Transducers Wheelchairs* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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