Ultraviolet solar radiation is involved in many biochemical processes, in the case of human beings in the production of vitamin D and melanin, but overexposure may result in highly harmful effects such as erythema, sunburn and even skin cancer. For this reason Libelium has recently integrated an Ultraviolet sensor in the Waspmote platform to control the UV Index which may be harmful for humans.
Read more here.
From Embedded.com, an interesting series on Designing intelligent sensors for use in an “Internet of Things”. Part 1 is about the basics of sensor design.
The article is available here.
The newly updated study, “WTRS Wireless Sensor Network Technology Trends, Q2 2010″, reviews and analyzes the available and proposed technology solutions competing for dominance in the wireless sensor network segment.
“Bluetooth Low Energy will be a significant contributor to the overall Wireless Sensor Network market, representing nearly half of all shipments in 2015″, said Kirsten West, Principal Analyst with WTRS. “Bluetooth Low Energy is designed to compete with protocols like ZigBee in applications which require infrequent and short bursts of data communication. The advantage to this new protocol is that it is totally optimized for low power battery operation.”
The WTRS Wireless Sensor Network Technology Trends Report analyzes and forecasts the market for wireless sensor networks. The report includes a thorough evaluation of emerging Wireless Sensor Network technologies and associated software including ZigBee, Bluetooth Low Energy, Wavenis, IEEE 802.15.4, Low Power WiFi, EnOcean, and others.
More info here.
The internet of things – or IoT for short – is all about bringing the analogue (physical) world into the digital (virtual) sphere so that physical objects can be identified, tracked, located and even controlled online, in real-time.
And what does the IoT mean? Lots and lots more lovely data.
Tell me more… here.
Perpetuum and Dust Networks have recently demonstrated that energy harvesting-powered wireless sensor networks are a practical reality even in the most demanding applications. Industrial condition monitoring systems can have high volume data transmission requirements and the consequent impact on power budgets is significant. However, the combination of Dust Networks’ low power SmartMesh WSN products with High Power Vibration Energy Harvesters from Perpetuum, delivers an effective solution to meet market needs, as demonstrated at the Sensors Expo conference in Chicago, Illinois.
See press article here (pdf)
Dr Abd Jamil Zakaria is no ordinary farmer. After years spent searching for ways to improve farming, he tells IZWAN ISMAIL that precision agriculture is the way to go. DR Abd Jamil Zakaria knows the challenges and pains of being a farmer. The principal researcher at Mardi grows crops such as tomato and melon at the research centre’s green houses in Serdang, Selangor.
Although what he grows are for research purposes, the valuable information he has gathered can be used to improve farming. He regularly meets up with farmers around the country to listen to their problems.
Precision agriculture technology is made up of components such as the micro-electro-mechanical system (MEMS) sensors, GSM network, agriculture management systems and green houses for the close environment farming. Abd Jamil says he has been using the MEMS sensors for a while.
These sensors allow farmers to collect in-field data, including temperature, humidity, soil moisture, pH level and macronutrients.
“So far the sensors have been delivering the much-needed information and we’ve managed to give crops the nutrients required in the correct amount,” says Abd Jamil. With non-automated sensors, farmers have to go to the field and collect the data at the sensor, which is still labour intensive.
“But automated sensors allow the farmers to sit at home or in the office and retrieve the information using computers, laptops or mobile phones.
More info here.
As battery technologies do not evolve fast enough to cope with our current vision and energy needs for WSN applications, we move toward energy harvesting, lower power devices and printed electronics. A recent IDTechEx post revisits the evolution of ad-hoc radio networking and some of the latest progresses in enabling technologies for WSN.
Full text available here.