This paper presents the performance evaluation of our wireless miniature Inertial Measurement Unit (IMU) WB-4 by compared with the Vicon motion capture system. In particular, a magnetic field calibration method is introduced to improve the sensor orientation estimate accuracy. The WB-4 IMU primarily contains a motherboard for motion sensing, a Bluetooth module for wireless data transmission wit...

In this paper, we propose a novel solution for the low-cost indoor localization and tracking problem using radio signal strength indicator, Inertial Measurement Unit (IMU), and magnetometer sensors available in smart handheld devices such as smartphones. The proposed algorithm does not require any sensor calibration and performs real-time. We develop a novel probabilistic IMU motion model as th...

The mitigation of NLOS (non-line-of-sight) propagation conditions is one of main challenges in wireless signals based indoor localization. When RFID localization technology is applied in applications, RSS fluctuates frequently due to the shade and multipath effect of RF signal, which could result in localization inaccuracy. In particularly, when tags carriers are walking in LOS (line-of-sight) ...

The use of walking aids is prevalent among older people and people with mobility impairment. Rollators are designed to support outdoor mobility and require the user to negotiate curbs and slopes in the urban environment. Despite the prevalence of rollators, analysis of their use outside of controlled environments has received relatively little attention. This Letter reports on an initial study ...

In this research, a new Map/INS/Wi-Fi integrated system for indoor location-based service (LBS) applications based on a cascaded Particle/Kalman filter framework structure is proposed. Two-dimension indoor map information, together with measurements from an inertial measurement unit (IMU) and Received Signal Strength Indicator (RSSI) value, are integrated for estimating positioning information....

Dual-frequency Global Positioning System (GPS) Real-time Kinematics (RTK) has been proven in the past few years to be a reliable and efficient technique to obtain high accuracy positioning. However, there are still challenges for GPS single-frequency RTK, such as low reliability and ambiguity resolution (AR) success rate, especially in kinematic environments. Recently, multi-Global Navigation S...

We present an approach to wearable sensor-based assessment of functional ability (FA) of individuals post stroke. We make use of one on-body inertial measurement unit (IMU) to automate the FA scoring of the Wolf Motor Function Test (WMFT). WMFT is an assessment instrument used to determine the functional capabilities of individuals post stroke. It comprises of 17 tasks15 of which are rated acco...

We present an application of a microelectromechanical systems (MEMS)-based inertial measurement unit (IMU) to thigh angle estimation for the control of a semi-active knee prosthesis. By using inertial based measurement devices, we can move all of our sensors to one location inside the prosthetic leg. These sensors are challenging to use, however, because error in their measurements will accumul...