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Energy consumption is a major concern in battery powered wireless sensor networks (WSN). For that reason there is a strong demand for the evaluation of power consumption of nodes in a wireless sensor network during its development phase. This evaluation can be done in early design stages by using simulations and models, but there is also the need for an evaluation in a real setup. This paper presents...
Asymmetric-dual-grating-gate high-electron-mobility-transistors (ADGG-HEMTs) are expected for on-chip, sensitive, room-temperature operating, high-speed THz detectors. In this paper, we experimentally verify the high-speed response of an ADGG-HEMT by measuring its response to THz pulse generated from an injection-seeded THz-wave parametric generator (is-TPG). From the pulse response waveform of the...
A 0.14 THz wireless communication system that can transmit data with bit rate of 5 Gbps in real time over more than 21 km is developed. Solid-state power amplifier and vacuum electronic amplifier are cascaded to achieve nearly watts output power. An all solid-state receiver running in room temperature with equivalent noise temperature of 1100 K is used. An experiment over 21 km is carried out with...
Thermal comfort of person living in building with radiant floor heating is not usually perfect. There is usually absence of control system based on each single room. This work proposes a simple, promising, effective and cost-effective regulation system for radiant floor heating. Designed system is based on small wireless sensors placed in every room to measure the temperature and wirelessly send it...
Internet of Things (IoT) can provide interconnection of things, which can promote the achievement of the remote human health monitoring. In this paper, a human health monitoring platform is designed and developed under the application framework of body sensor network of IoT. The platform can collect the physical information of user by constructing the human state acquisition system. And then the collected...
This paper describes the research for the design and implementation of a flexible, scalable and cost-effective medical system based on wireless sensors for remote monitoring of some vital physiological parameters. The proposed medical system has been designed to be integrated into a complex electronic system, based on assistive technologies, for assisting in the communication between the patients...
This paper describes system design issues involved in the development of a wearable wireless sensor system for continuous monitoring of skin pressure, temperature, and relative humidity. The system is intended for prevention of pressure ulcers (bedsores), and would alert a patient or caregiver to a potentially harmful level of contact pressure or adverse microclimate that could cause tissue damage...
From wearables to smart appliances, the Internet of Things (IoT) is developing at a rapid pace. The challenge is to find the best fitting solution within a range of different technologies that all may be appropriate at the first sight to realize a specific embedded device. A single tool for measuring power consumption of various wireless technologies and low power modes helps to optimize the development...
This paper presents a wireless temperature sensor for the cancer cell culture on ITO glass substrate. In order to measure the multi-point temperatures in the biochip, the sensor chip is not only a wireless temperature transmitter but also wirelessly powered. This wireless temperature sensor uses a standard TSMC 0.18 µm 1P6M CMOS technology. The measured reference voltage of bandgap voltage reference...
Implementation of precision apiculture methods into practice is highly depended on availability and cost-effectiveness of honey bee monitoring equipment. Expenses of monitoring system installation and maintenance activities also should be minimized. In order to successfully predict different bee colony states like: swarming, determine nectar collection activity and health of honey bees both in active...
Our work has developed the Internet of Things (IoT) LoRa prototype to support the remote measurement of temperature at the frequency of 915 MHz. The device is structured by a temperature sensor, memory storage, data processing and data visualization using Cloud Server on the Web Browser. The performance is evaluated by both LoS and Non-LoS field trial of 14 dBm transmit power. By using the IoT platform...
Since the effective and efficient system of water quality monitoring (WQM) are critical implementation for the issue of polluted water globally, with increasing in the development of Wireless Sensor Network (WSN) technology in the Internet of Things (IoT) environment, real time water quality monitoring is remotely monitored by means of real-time data acquisition, transmission and processing. This...
This paper presents a wireless sensing system utilizing ultrasound for wireless power transfer and data transmission. A central node transmits high-power ultrasonic waves towards the transducer of the sensor node. The sensor node performs power rectification, measures the temperature with a thermocouple, and transmits the encoded temperature back to the central node using on-off keying (OOK) modulated...
Body temperature is among most important biometric indicators that are normally checked in both domestic and hospital environments. The way to collect such parameter could be dramatically improved thanks to the Epidermal Electronics technology enabling plaster-like devices suitable to on-skin temperature sensing and capable of wireless communication with an electromagnetic reading module. The practical...
Wearable technology is an innovative creation in the embedded and biomedical field. Wearable technology have certain benefits, it saves hospital bills and reduce waiting time. The developments in embedded systems facilitate wearable techniques for patients. This paper approaches the problem of hospitals where many wards are present. There are some blind patients in one ward; also elder patients are...
In this paper, a Thermal Energy Harvesting (TEH) technique with power management circuit to condition the output power harvested from low-level heat energy sources with the intention to extend the lifetime of the wireless sensor network (WSN) node is presented. By using this approach, it can extends the WSN nodes lifespan from few days or even weeks (in a case of batteries powered) up to years or...
A real-time irrigation scheduling system (ISS) for greenhouses has been developed in compliance with the ISO/IEC/IEEE 21451 standard. The developed system is capable of displaying greenhouse and irrigation scheduling parameters. Irrigation can wirelessly be automated by the sensor node by activating irrigation based on sensor values and predefined irrigation parameters. A low power sensor node was...
Technology plays vital role in Media, Medical Healthcare Systems, Communications, Home Automation System, etc., Internet of Things is the latest trend used in healthcare monitoring system. IOT devices gather and share information directly with each other and the cloud making it possible to collect, record and analyze data streams faster and more accurately. Healthcare management is one of the most...
Design and implementation of acquisition system using radio frequency (ASK) module with personal computer (PC) and microcontrollers (PIC) is proposed in this work. The paper includes hardware and software design. The first part of the system is composed of measurement instruments such as sensors, electric furnaces, pneumatic process and wireless transmitter (TX). The second part consists of radio...
The wireless devices classification based on the transmitter imperfections is one of the promising ways to provide additional security to future wireless communication networks. Although several aspects, both theoretical and practical, have been studied recently, there are no studies investigating the degradation of such authentication due to the environmental changes, such as the device temperature...
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