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This paper presents a load position estimation methodology of a linear motor driven table system using a MEMS accelerometer. The system is composed of a table and a load connected via an elastic beam attached on the table. In order to improve the performance of the load positioning, the load position measurement would be important. However it might be difficult to place position sensors on the load...
The need to extend battery life in IoT devices, self-powered sensors and autonomous nodes increasingly highlights the necessity to reduce energy consumption as much as possible. One of the main issues to resolve is therefore the reduction of power consumption of electrical appliances while in "standby" that represents a significant amount of the total power dissipation. Today, despite the...
We present a new intuitive and rational model of parametric resonance. In parametric resonators one of the system parameters, usually stiffness, is modulated in time. Due to this time modulation the system may develop a periodic response. It is well known that when this modulation is sufficiently strong and at an appropriate frequency, the periodic response may be unbounded — even though the system...
Movement and social life of wheelchair users are constrained by their disability and suitability of paths they can move on. Modern electric wheelchairs offer them assisted drive, making their movement easier and longer. They, however, do not prevent accidents, injuries, and inconveniences caused by path roughness and ramp slopes. Providing information about suitability and accessibility of paths and...
An initial feasibility study is conducted through subscale testing in order to assess several sensing techniques for their ability to detect corrosion damage and lubrication failure in propulsion ball bearings. Conventional vibroacoustic methods are compared and a thermography technique is examined in brief. Initial results indicate that for small, distributed corrosion pitting damage, PZT acoustic...
Real-time monitoring of tool wear in microdrilling is a key factor in improving the performance of micro-machining operations. This study presents the basis to design a real-time monitoring system for microdrilling operations. The experimental research has the objective of determining both the minimum type of necessary information and the axial positioning of the sensors that provide information on...
Increasing incomes and awards of games leads to better manage games for referees to prevent decision errors. Besides investments made by authorities to better train referees, it is becoming more and more necessary to automatize the game arbitration processes. For amateur games with no referee, there is also a need for an automation system to replace the referee. One of the popular games is table tennis...
This paper demonstrates a high accurate split mode tuning fork gyroscope with sub-degree per hour stability. The gyroscope sensing element is fabricated in an 80µm-thick SOI process and sealed in a wafer level vacuum package. Interfaced with an ultra low noise CMOS readout circuit, this gyroscope achieves 0.006 deg/√h angle random walk (ARW) and 0.18 deg/h bias instability. Its corresponding zero...
In the recent years music therapy is becoming popular even though it is known from ages that music has an impact on our physical and physiological conditions. Soothing and rhythmic music has an impact on physical and physiological conditions of living organisms plants, animals, especially human plays his flute with melodies, all are drawn towards the music as a magnetic attraction. Especially Secret...
In this work, a self-generated power capacitance measurement circuit for wireless health monitoring system is proposed. Hybrid energy from thermal and solar energy is expected to be used to supply the energy harvester. The present results has shown using low cost, off-the-shelf components, the capacitance measurement circuit is able to sense a linear capacitance range of 9.8 – 10.35 pF over 1.478...
Fiber Bragg Grating (FBG) sensors have become one of the most widely used sensors in the recent times for a variety of applications in the fields of aerospace, civil, automotive, etc. It has been recently realized that FBG based accelerometer's performance meets and/or exceeds that of traditional sensors. The present work is about the development of a novel, real-time, dynamic two dimensional Accelerometer...
In its effort to develop unmanned autonomous systems research capabilities, the college of engineering is adding a rotary wing UAV to its research activities. This paper demonstrates the use of Maxi Joker 3 commercial-off-the-shelf (COTS) electric RC helicopter as a platform and implementing it with COTS autopilot system to serve as a benchmark for future AUS rotary wing in-house autopilot development...
Tactile sensing is paramount important in motor rehabilitation; several techniques are exiting for a tactile sensing. The successful interface of tactile and haptic devices achieves aim of human machine interface system. In the process of rehabilitation sensing and perception correctly is the important aspect of subject progress towards right diagnoses. This paper discusses about all recent trends...
Sensors are often mounted on cylindrical shells for searching underwater objects. The sensors are contanminated by the noise generated by vibrations of the shell and their radiation. This paper investigates the noise of sensors induced by the vibrations and their radiation. The vibrations taken into account the fluid-loading effect are analysed using Waveguide Finite Element and Boundary Element Method...
In the last few decades, the use of mobile phones have increased rapidly. Safety experts have considered dependency on mobile phones as a threat to the pedestrian safety. In this paper, a wearable smart-cap has been proposed to detect an obstacle in the path of a pedestrian mobile user. The vision of the proposed system is to provide a user-friendly, cost effective and a quick way to avoid pedestrian...
This paper introduces the development and evaluation of an affordable device which complements the workings of a white cane. The attachable device is bolstered with environmental sensing sonars, allowing the visually impaired to navigate around safely and efficiently. With the usage of ultrasonic sensors, hanging objects, incoming step-down and walls can be detected. Users are cautioned of potential...
A performance estimation method for resonant viscosity and density sensors is described. The ultimate sensor precision and the separability of density and viscosity from measured frequency spectra are estimated. The approach relies on using recently introduced models which are flexible enough to describe a large class of sensors. It is therefore not required to develop a specific sensor model and...
This paper reports the preliminary results of a new designed harvester system called as the contactless piezoelectric wind energy harvester (CPWEH). It consists of three piezoelectric layers attached with the non-magnetic bars in different lengths in order to produce maximal power for a wide wind wide speed regime. Preliminary magnetic design has proven that three layers can be excited by the magnetic...
High-performance electro-static gyroscopes require expensive vacuum-packaging, to maintain the high-Q of the MEMS, and may require high actuation voltages. Piezo sensors, on the other hand, do not suffer from these shortcomings. In this work, the architecture and the measurements results of a high-performance quartz gyro are presented. The architecture of the gyroscope interface ASIC adopts a mostly-digital...
A Micro-electromechanical systems (MEMS) sensor with the variable cross-section micro-cantilever was designed to measure the fluid viscosity. Due to the quality factor of micro-cantilever under the torsional resonance is much higher than that under the first order flexural resonance, the fluid viscosity measuring accuracy under the torsional resonance is much higher. Then an exciting method named...
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