EnOcean® energy harvesting wireless sensor technology collects energy out of air. The energy existing in our environment, for example kinetic motion, pressure, light, differences in temperature, is converted into energy for wireless communication. Combining miniaturized energy harvesters and ultra-low power wireless technology creates maintenance-free sensor solutions.
ENERGY FROM MOTION
This principle uses the power of motion to generate energy for wireless signals. When pressing a switch, for example, an electro-mechanical energy converter is activated and uses this movement to generate energy for a telegram. This telegram can turn on/off household appliances or a light. The same functionality can be used for a kinetic window contact, which registers if a window is open or closed.
ENERGY FROM LIGHT
Wherever there is light, even at low level of 200 lux or less, tiny solar cells can harvest this source of energy for a broad range of battery-less sensors. This includes temperature sensors, CO2 sensors, occupancy sensors, solar-powered window contacts or humidity sensors.
ENERGY FROM TEMPERATURE
A temperature difference of already 2 °C delivers enough energy for electronic devices, enabled by the combination of a DC/DC converter and a Peltier element. This harvesting technology operates self-powered heating valves, for example, which use the difference in temperature between the heating radiator and the environment to provide energy for changes in stroke as well as for wireless communication with a solar-powered room controller.
ULTRA LOW ENERGY CONSUMPTION
EnOcean® modules combine micro-energy converters with ultra-low power electronics and reliable wireless communications. The radio trans-mission used has very low energy demand while simultaneously offering a large range. Outdoors, this range is about 300 meters, in buildings it lies at up to 30 meters. One reason for the low energy consumption is the short transmission period which is only 1 millisecond (ms). Two repeat-telegrams are sent within 30 ms in order to prevent erroneous transmissions.
EnOcean® wireless technology is necessary to a flexible and efficient building automation at minimized installation time and system costs. It is suitable for retrofits and also for new buildings. The system is expandable at any time according to a client needs.
The security is ensured by sending of two very short asynchronously consecutive telegrams. As a permanently self changing security mechanism, every telegram is created with a rolling code. The data is encrypted by each transmitter individually and then de-crypted by the respective receiver.
An investigation by the independent ECOLOG institute has shown that the high frequency fields produced by batteryless wireless technology are a hundred times less powerful than classical, wired solutions. Additionally, the devices, in contrast to other wireless standards such as WiFi, only transmit for a few milliseconds, and only when an activity is necessary. As a result, even radio-sensitive people can use building radio systems without a problem. Furthermore, the products don't create any low-frequency electro-magnetic emissions.