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How New Sensor Technology is Opening up Smarter Presence Detection

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By Anders Jansson, CTO, JonDeTech Sensors AB N

ew sensor technology can bring about new and more efficient presence detection in, for example, the construction and real estate sectors. The solution is a small, inexpensive, battery-powered and IoT-caged sensor

that is also be able to be connected very quickly with the help of upcoming 5G networks. Rapid technological development within the Internet of Things (IoT)

means that more and more things in our everyday life will be connected. The connection is made with the help of a gateway or a hub, which can collect data from a large number of sensors, which it then sends to the cloud, for example, by 5G. IoT and sensors will be each other’s preconditions in a variety of tech-

Rapid technological development within the

Internet of Things (IoT) is connecting a huge amount of everyday devices. This connection is made with

the help of a gateway, or hub, which can collect data from a large number of sensors, which it then sends to the cloud.

nical solution areas. One such area is smart homes and buildings. Here, the development is very fast — from older sensors that control a relay that con- trols a lightning system to a whole new generation of sensors that can send data to just one gateway.

Pyro Electric Sensors Most of today’s sensors for presence detection are built with pyro electric

sensors. But, the technology’s properties are limited and can only sense changes in temperature, making it less suitable for areas where the user is ex- pected to stay, for example, in a room or in front of a computer. New sensors, on the other hand, have the ability to detect human presence by detecting the heat radiation. In this way, they are much better at detecting im- mobile people in a room, office space or in front of a unit, like a computer or a tablet. This new generation of pres-

ence detection is equipped with a so-called thermopile, which is manufactured using nanotechnol- ogy. Thermopiles are a series of connected thermocouples that can convert thermal energy into elec- trical energy. They can be used to measure absolute or relative tem- perature and heat flow. This can be used in turn to detect, for ex- ample, movement or presence. Moreover, they are passive and do not consume any energy when not measuring.

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New Application Areas Common areas of use include

June, 2019

Billed as the world’s thinnest IR sensor, JonDeTech's new thermopiles generate direct,

proportional voltage response when subjected to infrared radiation.

smoke and gas detection, movement, absolute temperature measurements, heat measurement and control of heat-sensitive parts and plumbing. Other areas of use include smart offices or public spaces such as libraries, e.g., to see if a place is vacant or not. By using the sensor to wake a device only when someone is present, it is

possible to reduce the energy consumption and extend the battery life. These new types of sensors can potentially also be used to activate biometric authen- tication systems, such as fingerprint scanning or facial and iris recognition, which consume a lot of energy when active.

Nanotechnology The sensor itself is based on nanotechnology, which offers many advan-

tages. It measures only 0.007 in. (0.17 mm) in thickness and is almost entire- ly made of plastic. The plastic piece is very robust and can be used without the metal housing, or protective cover, which is often used on conventional sen- sors. In addition to being thin and robust, the sensor is also very flexible, but also cost-effective to produce in large volumes. It makes it suitable for all types of applications that require small sensors where temperature or heat

flow should be measured. Contact: JonDeTech Sensors AB, Grev Turegaten 10 A,

114 46 Stockholm, Sweden % 556951-8532 E-mail: Web: r

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