Battery-Less NFC Sensor for pH Monitoring

Optical pH Sensor Based on Quinizarin for Alkaline pH Regions

The development of an optical pH sensor based on immobilization of quinizarin (1,4-dihydroxyanthraquinone) on a triacetylcellulose membrane was described. The resulting membrane exhibited fast color change from yellow to violet, while changing the pH in alkaline region. The immobilized quinizarin showed a broader dynamic range from (pH 9.4-11.4) with respect to free form (pH 8.8-10.4). The sens...

Soil calcium and pH monitoring sensor system.

An agrarian sensorial system based on temperature, moisture, and all solid-state ion-selective potentiometric sensors was developed with the objective of monitoring the behavior of H+ and Ca2+ ions in soil and in real conditions, contributing with a new tool that tries to complement the current precision agriculture technology. The evaluation of the sensorial system to pH monitoring presented a...

Body sensor networks in fetal monitoring with NFC enabled Android devices

As many areas of the medical field are becoming more and more interested in telemedicine and outpatient care, we focused on obstetrics and the monitoring of fetal health as an area of medicine that could benefit greatly from body sensor network (BSN) technology. In this paper, we explore some of the hardware sensor interface challenges involved with condensing the fetal monitoring procedure int...

Multiband NFC for High-Throughput Wireless Computer Vision Sensor Network

With emerging machine learning algorithms [1-5], computer vision tasks such as face recognition, object detection and simultaneous localization and mapping (SLAM) are now using more and more machine learning methods. In order to achieve good results, large amount of data is required to feed into algorithm. This not only requires energy-efficient computation [6-7], but energy-efficient data tran...

Battery Monitoring System using