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MEMS (Micro-Electro-Mechanical Systems) inertial motion sensors have greatly improved the intelligence of wearable devices, sports fitness equipment, and consumer electronics. To avoid the disadvantages of each discrete inertial sensor, the tendency is to combine and fuse several different types of inertial motion sensors; thus, consumer-grade inertial motion sensors even have the same performance...
Although robot calibration has maturational fundamental theories, its practical application is still in the primary phase. In fact, most users are hard to manipulate an industrial robot with high absolute positioning accuracy. Thus, this study intends to measure the dynamic path accuracy of a six-axis industrial robot based on an optical tracker, instead of an expensive laser tracker. The motion tracking...
The position and orientation of an object embedding with a permanent magnet can be acquired in real time via a magnetic tracking system. However, one characteristic of the magnetic tracking technique is its varied tracking accuracy along with the tracking distance. Hence, this paper tends to investigate the relationship between the tracking accuracy and the distance from the magnet to the sensor array...
Bradykinesia is one of the primary characteristic symptoms of Parkinson's disease (PD). Ten-second whole-hand-grasps action was chosen to assess bradykinesia severity in this study. A quantification assessment system based on a self-developed wearable device was proposed to assess the severity of the parkinsonian bradykinesia. The proposed assessment method used an attitude-estimation algorithm to...
Orientations and positions of a permanent magnet can be acquired via a three-axis magnetic sensor array system. Thus, the position and orientation of an object embedded with the permanent magnet can be tracked in real-time. This magnet tracking system can be adapted to medical and industrial applications. How to detect the weak magnetic signal and the sensor fusion algorithm are vitally important...
The aim of this study is to propose a three-dimensional visual localization method based on binocular cameras. This method would improve the system localization precision in infrared ray (IR) environment, including modified calibration method, a quick and exact distortion adjustment technique and geometric reconstruction method combining feedback compensation. A system has been established and verified...
Effective home energy management system (HEMS) at the consumer level is a crucial part of the future smart home, particularly for electrical power load balancing. In this paper, a feasible and lightweight HEMS is proposed, with a smart socket that is capable of appliance recognition. The smart socket based on appliance recognition could calculate appliance's power consumption and shut off the electrical...
Rigidity is one of the primary motor symptoms of Parkinson's disease. In order to quantitatively assess parkinsonian rigidity, an examiner repeatedly extends and flexes the patient's joint and the applied force on the both side need to be recorded with a force sensor-based wearable device. However, choosing of the force sensors is the key factor for a wearable rigidity assessment system. In this study,...
Because of the rapidly increasing of elderly people and acute shortage of nurses in present aging society, the nursing care of older people become a significant issue. In this study, we present the concept of a wireless sensor network, which include a series of wearable watches and smart cups, for motion tracking and drinking recording. Based on the motion sensors, pressure sensors, and additional...
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