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In industrial electrical drives has been traditionally employed the technique of analysis the technique of analysis of vibration to detect misalignment between the motor axes and the load. This technique requires the placements of sensors directly on the drive, which makes it difficult to apply. In some cases, it may be impossible to apply (submerged or hard access drives). Recently, as complement...
Many current home health monitoring systems are based on wearable sensors, which may compromise patient compliance and adherence due to the irritation or inconvenience of wearing, maintaining and charging such devices. In addition, most existing systems can only acquire limited relevant data and thus fall short of clinical value. In an effort to address these limitations, this paper reports the initial...
In this study, a bed-leaving detection system using piezoelectric sensors was proposed to monitor vital signs of the human body such as arterial blood pressure, breathing motion, and body movement. This study reports on the details of a fast and concise algorithm designed to detect vital signs from vibration signals that are recorded via piezoelectric sensors installed inside a pillow and under a...
In the past decade there have been significant advancements in computer technology that have reduced the hardware form factor as well as increased energy efficient computing. Using network protocols for near field communication such as Body Area Networks (BANs), smaller and lighter computing units with attached sensors have transformed into wearable devices. These devices have served a plethora of...
In this feasibility study, we present a novel, wearable prototype of tactile biofeedback to alleviate gait disturbances, such as freezing of gait in Parkinson's disease. We designed and tested a phase-dependent tactile biofeedback system that can be easily worn on the feet, with a simple switch to turn it on or off. Preliminary validation was performed in 8 subjects with Parkinson's disease who show...
The ability to monitor arterial blood pressure continuously with unobtrusive body worn sensors may provide a unique and potentially valuable assessment of a patient's cardiovascular health. Pulse wave velocity (PWV) offers an attractive method to continuously monitoring blood pressure. However, PWV technologies based on timing measurements between the ECG and a distal PPG suffer from inaccuracies...
A wearable integrated health-monitoring system is presented in this paper. The system is based on a multisensor fusion approach. It consists of a chest-worn device that embeds a controller board, an electrocardiogram (ECG) sensor, a temperature sensor, an accelerometer, a vibration motor, a colour- changing light-emitting diode (LED) and a push-button. This multi-sensor device allows for performing...
In recent years, several wearable devices have been proposed for monitoring nutrition intake, tracking energy expenditure, and performing activity recognition. Long device lifetimes are critical because frequent battery replacements increase user burden and yield poor long-term compliance rates. Though countless wearable devices have been proposed in recent years with varying sensors and applications,...
Piezoelectric sensors have played an important role both in medicine and medical research. In this application piezoelectric sensors are used to detect the respiratory patterns through the vibration caused by the expansion of the chest cavity. Currently available methods require placing the animal in direct contact with the sensor which is usually inconvenient. The main goal of this project is to...
Maintaining appropriate levels of food intake anddeveloping regularity in eating habits is crucial to weight lossand the preservation of a healthy lifestyle. Moreover, maintainingawareness of one's own eating habits is an important steptowards portion control and ultimately, weight loss. Though manysolutions have been proposed in the area of physical activitymonitoring, few works attempt to monitor...
This paper discusses the application use of our WSN platform called Sprouts to monitor the current erosion conditions and retrieval of lost shovel-teeth in the Oil Sands mining operations of Ft. McMurray, Alberta, Canada. The modular architecture design of Sprouts allows us to customize the platform to monitor the thickness of shovel teeth and localize their position upon detachment. Utilizing our...
In the article characteristics of signals recorded by 3-axis MEMS accelerometers and gyroscopes during driving a car was presented. The method of acquisition was discussed as well as the structure of Logger Box measurement system and conditions of conducting experimental research. Signal bands were assigned, typical for maneuvers, vibrations from the road pavement surface and disruptions generated...
A non-constraint cardiac vibration, respiration, and body movement monitoring system has been developed. The sensor system is designed to be easily installable under an existing bed mattress. The sensor consists of a 40-kHz ultrasound transmitter and receiver pair. The transmitted ultrasound is reflected on the mattress' undersurface, and the amplitude of the received ultrasonic wave is modulated...
Structural health monitoring is a new research focus and has being paid more and more attention in engineering. Based on the traditional NDT, SHM improve the ability of faults detection, diagnosis and prognostics. Especially in aeronautics, SHM has been applied to monitor the aircraft status and guide its maintenance, with the aim to improve its reliability, safety and reduce the cost. The faults...
As to the aircraft, structure, airborne equipments and aero-engine are of paramount importance. PHM (Prognostics and Health Management) implementation can help the aviation industry to significantly improve safety standard. The basic principles, the motivation of PHM and the key technologies involve sensing technology, fault diagnostic technology and prognostic methods are reviewed firstly in this...
We have developed a non-invasive system for monitoring cardiac vibrations, respiration and body movement of in-bed hospitalized patients and elderly people who need constant care. These physiological parameters are recorded by an infrared emitting diode and a photo transistor, which are attached between spring coils in bed mattress. The infrared emitting diode diffuses infrared light into the mattress...
In this paper we introduce a device for monitoring subjects by logging sensory data over long periods of time. The system consists of a sensory measurement unit, a memory unit and an application for data preprocessing tasks, such as converting sensory measurements to desired units or calculating averages. In order to demonstrate usage, an activity level monitoring system inspired by medical applications...
A missile during air carriage is subjected to high vibratory forces. These forces consequently impose high levels of stress on the attachment points to the aircraft. A repetitive application of stress causes fatigue. However, since the vibratory forces cannot be measured directly at the interface, an inverse method utilizing missile accelerometer data has been used to determine the forces. This paper...
The objective of this paper is to introduce Newland Harmonic wavelets and Pincus (1991) approximate entropy are applied to extract weak cycle jumps. Because some weak vibration signals contained strong noises are very important for fault forecast. Based on harmonic wavelet mesh plot of the vibration signals, we can induce contours of the mesh map with log space, then, we offer the time-frequency profile...
The real time monitoring and control of resistance spot welds is a problem of critical importance in automotive and many other manufacturing industries. However, till this date, there are no reliable, low-cost, non-destructive techniques for predicting the size and strength of the weld nuggets in real time. This paper investigates the usage of voltage, current, and force data for the above tasks....
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