—The measurement precision of Micro Electronic Mechanical System (MEMS) accelerometer are influenced by zero drift, scale factor and installation error. In order to increase the measurement accuracy of the MEMS accelerometer, an improved calibration method is proposed on the basis of traditional six position method. The raw measurements of the MEMS accelerometer not divided by the scale factor...

Robot calibration for an environment is a tedious task that usually involves extensive, if not total, human intervention. However, robots have sensing mechanisms, in particular accelerometers, which could in principle be used to detect specific environmental states. In this paper, we contribute several approaches for robots to detect their state using accelerometer data. In particular, we use a...

An accelerometer-array calibration method is proposed in this paper by which we estimate not only the accelerometer offsets and scale factors, but also their sensitive directions and positions on a rigid body. These latter parameters are computed from the classical equations that describe the kinematics of rigid bodies, and by measuring the accelerometer-array displacements using a magnetic sen...

To solve the problem of resonance during quasi-static calibration of high-g accelerometers, we deduce the relationship between the minimum excitation pulse width and the resonant frequency of the calibrated accelerometer according to the second-order mathematical model of the accelerometer, and improve the quasi-static calibration theory. We establish a quasi-static calibration testing system, ...

[Purpose] This study aimed to determine the correlation between accelerometer-based and treadmill-based analysis systems for measuring gait parameters during comfortable walking in healthy young adults. [Subjects and Methods] Twenty-three healthy adults participated in this study. Gait parameters were measured with simultaneous use of accelerometer-based and treadmill-based gait analysis system...

OBJECTIVE Physical activity is critically important for successful aging, but its effect on adiposity markers at older ages is unclear as much of the evidence comes from self-reported data on physical activity. We assessed the associations of questionnaire-assessed and accelerometer-assessed physical activity with adiposity markers in older adults. DESIGN/SETTING/PARTICIPANTS This was a cross...

BACKGROUND Inexpensive, reliable objective methods are needed to measure physical activity (PA) in large scale trials. This study compared the number of pedometer step counts with accelerometer data in pregnant women in free-living conditions to assess agreement between these measures. METHODS Pregnant women (n = 58) with body mass index ≥25 kg/m(2) at median 13 weeks' gestation wore a GT1M A...

Monitoring the response of structures, especially tall buildings, under severe loading conditions is an important requirement for the validation of their design and construction, as well as being a maintenance concern. Traditionally such response has been measured using accelerometers. However it is impossible to measure the static or quasi-static components of movement with such sensors. An in...

In this paper design of a two-axis capacitive accelerometer is described. Variation of capacitance of the device with applied acceleration as well as sensitivity of the device is analyzed. The performance analysis of the device is done using ANSYS Multyphysics software. From the analysis results, a capacitive mems accelerometer with enhanced sensitivity has been proposed. The sensitivity of the...