1994
DOI: 10.1007/bf02512539
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New portable instrument for long-term ambulatory monitoring of posture change using miniature electro-magnetic inclinometers

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Cited by 25 publications
(13 citation statements)
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“…In order to correct the accelerometer output for the gravitational component, information about the orientation of the sensor within the field of gravity should be available throughout the measurement period. This requires the synchronous recording of the orientation, for example with goniometers or inclinometers (SMEATHERS, 1989;TANAKA et al, 1994), or with film and video (LAFORTUNE and HENNIG, 1991).…”
Section: Introductionmentioning
confidence: 99%
“…In order to correct the accelerometer output for the gravitational component, information about the orientation of the sensor within the field of gravity should be available throughout the measurement period. This requires the synchronous recording of the orientation, for example with goniometers or inclinometers (SMEATHERS, 1989;TANAKA et al, 1994), or with film and video (LAFORTUNE and HENNIG, 1991).…”
Section: Introductionmentioning
confidence: 99%
“…Besides these innovative approaches described here, we have also continued developing ambulatory monitoring systems suitable for both clinical and home use, focusing particularly on the acquisition of data for the evaluation of cardiovascular hemodynamics and human activity. Following our earlier developments of ambulatory cardiovascular hemodynamic (20)(21)(22)(23)(24) and activity monitoring systems, (25)(26)(27)(28) we have recently improved these two systems for more practical use. (7,8) Detailed operational performance, accuracy, and reliability of the two have already been successfully demonstrated and reported in the literature.…”
Section: Ambulatory Cardiovascular Hemodynamic and Activity Monitoringmentioning
confidence: 99%
“…(7,8) Detailed operational performance, accuracy, and reliability of the two have already been successfully demonstrated and reported in the literature. (7,8,(20)(21)(22)(23)(24)(25)(26)(27)(28) Brief descriptions of each system are therefore given below.…”
Section: Ambulatory Cardiovascular Hemodynamic and Activity Monitoringmentioning
confidence: 99%
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“…On the other hand, we developed a portable device measuring the trunk, thigh and calf angle to the gravitational direction to improve of quality of life for the elderly persons [9]. At the beginning of development, we used miniature electromagnetic inclinometers to measure angles, but had problems with limited measurement range and inertial artifacts of the weight built in the sensor.…”
Section: Introductionmentioning
confidence: 99%