磁気式限流器の開発と実装法に関する研究

取得学位：博士(工学)，学位授与番号：博乙第206号，学位授与年月日：平成12年3月22日,学位授与年：200

Reduced graphene oxide for the development of wearable mechanical energy-harvesters: A review

The unique characteristics of graphene have generated a lot of interest in the research community. A concept of utilizing graphene and its derivatives in the development of energy harvesters has just appeared in recent decades. This paper focuses on the application of reduced graphene oxide (rGO), a graphene derivative, in the development of wearable mechanical energy-harvesters to enable self-powered wearable sensing systems. Harvesting of energy has been a state-of-the-art phenomenon due to the ever-increasing requirement of power to run the sensing systems. Flexible systems that used rGO to gather energy with intensities ranging from a few microwatts to a few hundreds of microwatts have been used. Some examples are presented, focusing on the class of piezoelectric and triboelectric-based energy harvesters, with descriptions of their material composition, manufacturing methods, operating principle, and performance. Finally, the challenges and drawbacks of rGO-based energy harvesters are discussed, along with some of the potential solutions

Development of planar electromagnetic sensors for measurement and monitoring of environmental parameters

Novel planar electromagnetic sensors designed, fabricated and tested for environmental monitoring are reported in this paper. Intensive modelling of the sensors is also discussed. Experiments were conducted to obtain the impedance characterization for each sensor and the results were compared with the simulation results. The sensors have been tested to detect nitrate contamination in distilled water from two sets of experiments. First, two nitrate forms, namely sodium nitrate (NaNO3) and ammonium nitrate (NH 4NO3), each of different concentration between 5 and 20 mg dissolved in 1 litre of distilled water, were used to observe the sensor response. Second, NaNO3 and NH4NO3 were mixed in several different ratios in 1 litre of distilled water and the responses of the sensors were observed. The best sensor has been determined based on the interpretation from both nitrates' experimental results. Preliminary results show that the best sensor can very well detect the presence of nitrate added in distilled water and can distinguish the concentration level. The work and improvement for future consideration are also discussed in this paper

Intelligent sensing, instrumentation and measurements

  “Intelligent Sensing, Instrumentation and Measurements” addresses issues towards the development of sensor nodes for wireless Sensor Networks. The fundamentals of sensors, interfacing, power supplies, configuration of sensor node, and GUI development are covered. The book will be useful for engineers and researchers in the field ,especially for higher undergraduate and postgraduate students as well as practitioners working on the development of Wireless Sensor Networks or Smart Sensors

A Wifi based smart wireless sensor network for monitoring an agricultural environment

This paper reports the design and development of a smart wireless sensor network (WSN) for an agricultural environment. Monitoring agricultural environments for various factors such as temperature and humidity along with other factors can be of significance. The ability to document and detail changes in parameters of interest has become increasingly valuable. Investigations were performed for a remote monitoring system using WiFi, where the wireless sensor nodes are based on WSN802G modules. These nodes send data wirelessly to a central server, which collects the data, stores it and allows it to be analyzed and displayed as needed

Smart home : recognition of activities of elderly for 24/7; coverage issues

A smart home has been designed and developed to monitor elderly people who lives alone and needs assistance to perform their daily living activities. The system monitors different activities of the elderly and determine the wellness of the person. It is a challenge to recognize different activities of the elderly over 24 hours for the seven days a week. The coverage issues in terms of monitoring the elderly are discussed in the paper.10 page(s