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Communication and data transfer demands are growing fast in last few decades. In order to obtain higher data transfer, it is necessary to determine proper antenna placement in a wireless system. In this paper, we research propagation in tropical environment and L-Band frequency by conducting distance and high variation measurement at frequency 1.8 GHz and 2.4 GHz. The received power level decreases...
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...
We report on experimental demonstration of a wireless temperature sensor node (WTSN) powered by a piezoelectric resonant energy harvesting system. The energy harvesting circuit stores the energy generated by a piezoelectric resonant transducer into a capacitor, and uses the stored energy to power the temperature sensor and its associated signal processing circuits for wireless signal transmission...
Passive RFID transponder applications, requiring integrated sensors, can greatly benefit from unconventional sensing strategies. Especially in situations where there is the need to continuously monitor environmental properties, but without having access to an energy source or an omnipresent reader station in communication range. Since in many cases the violation of a threshold value is of interest,...
We present analytical and experimental thermal characteristics of a battery-less, fully-passive wireless backscattering microsystem for recording of neuropotentials. A major challenge for cortically implantable microsystems involves minimizing the heat dissipated by on-chip circuitry, which can lead to permanent brain damage. Therefore, knowledge of temperature changes induced by implantable microsystems...
In order to protect cultural relics in the museum, a micro-environment is designed to monitor the humidity, temperature, gaseous pollutants. With the wireless communication module, all the micro-environment monitors in the museum can make up a wireless network system, which monitors the preservation condition of the cultural relics in real time. The micro-environment monitor consists of AMCs(airborne...
Structural Health Monitoring (SHM) systems have been used with many important structures to enhance the public safety and to reduce the economical losses. Wireless Sensor Networks (WSN) is an emerging technology which can be deployed with SHM applications. However, some system requirements have been overlooked in the current WSN designs for SHM applications. Therefore a complete analysis in system...
A new multi-parameter monitoring system based on wireless sensor network is introduced in the paper. The system synthetically applies the technology of modern sensor, circle system and wireless data transmission. Multi-parameter collection, transmission and display of the water environment, such as salinity, temperature, are realized by the system, and the fast and accurate transmission of the data...
Several measurement campaigns have shown that numerous spectrum bands are vacant although licenses have been issued by the regulatory agencies. Dynamic spectrum access (DSA) has been proposed in order to alleviate this problem and increase the spectral utilization. In this paper we present our spectrum measurement setup and discuss lessons learned during our measurement activities. We compare measurement...
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