Walking speed and slope estimation using shank-mounted inertial measurement units

Prototype for the estimation and evaluation of walking velocity using acceleration transducers

“…DISCUSSION AND CONCLUSSION At the end of this document were achieved the main aimed goals during the different stages of the methodology of the proposed project and thus it was able to validate the produced prototype in order to leave as the legacy of this project a platform with a low cost (close to 96.88% less) of project and which also represents the certified devices of validation [26] [27] ]28], which uses an accelerometer sensor with a 100 times higher sensibility than the implemented prototype in this work [23] [30]. Even when working in real time with the validation platform, the results kept constant and this identifies the same result observed in [5]: a no relevant collecting of data in real time for this type of acquisition and mathematical processing of data.…”

“…Two of the physical magnitudes that can be monitored through the acceleration sensors and spin are the linear acceleration and the angular velocity with which is possible the calculation of velocity, linear movement and the rotation angles during the walking movement [4] [5].…”

Determination of a Patient's Speed and Stride Length Minimizing Hardware Requirements

“…Where a max and a min represent the maximum and minimum values of the acceleration within each stride, and K is a constant which depends on the individual and needs to be calibrated experimentally, but which can be approximated by 0.55, since the variation between different people is not very large (typically K ranges from 0.5 to 0.57) [10]. However, the accuracy of this approach can vary depending on the particular gait pattern.…”

“…Through literature review, we have found seven main methods leveraging accelerometers for the estimation of stride length in straight line walking [10]- [12]. Common experiments carried out for the measurements in these methods place the sensors hardware on the foot or close to the L3 vertebra, which is accepted as the center of mass of the human body [13].…”

Real time patient's gait monitoring through wireless accelerometers with the wavelet transform

“…In fact, the use of accelerometers for step counting is receiving special attention for health related applications. A remarkable research work in this sense is presented in [12], describing a pedestrian dead reckoning system which combines inertial navigation (magnetic compass and accelerometers) and sensor network technology to download compressed data to the network when the user is within range of a sensor node. For the detection of steps, they use only the vertical component of the acceleration, and since normal walking frequencies are constrained below 3 Hz, they apply a low-pass filter to smooth the acceleration signal (and consequently maximize resolution):…”