DISTRIBUTION
are protected against impacts, allow better cleaning of the surfaces in front of them and contribute to better aesthetics due to their invisibility.
As radar works with electromagnetic waves, the sensors are not sensitive to sunlight and are therefore reliable in their functionality. Radar sensor technology at 60 GHz, for example, is a non-contact and highly accurate measurement solution. Distance measurements or people counting applications can be carried out with a distance, angle and condition detection sensor using radar waves in the 60 GHz band.
At the same time, their sensitivity is so high that movements in the sub-millimetre range can be detected, allowing particularly intuitive contactless interaction. The key to safe human-machine cooperation is the detection, tracking and segmentation of human presence, which radar sensors deliver in combination with extremely high accuracy in the detection of micro and macro movements. However, this does not use actual photo images, which is a real advantage for privacy.
PAS method for precise CO2 sensing Sensors based on MEMS technology, for example, provide precise CO2 measurement (see Figure 4). They combine a photoacoustic
Figure 3: Photoacoustic spectroscopy to determine the CO2 concentration
transducer including detector, an infrared source and an optical fi lter, a microcontroller for signal processing and algorithms as well as a MOSFET chip for operating the infrared source on a printed circuit board. The integrated microcontroller performs ppm calculations as well as advanced compensation and confi guration algorithms. The result is the real CO2 content and not just a correlation. Various confi guration options and interfaces are also available.
Figure 4: The RAB2 adapter board from Rutronik System Solutions offers a unique approach for the use of CO2 sensors, in which two state-of-the-art sensors from Infi neon and Sensirion can be com- pared with each other.
Figure 5: In the pre-development phase, inter- ested customers receive expert support from Rutronik in the selection of optimally suitable components - in the form of technical know-how and self-developed proof-of-concepts, which are made available to customers with a complete BOM, among other things.
The smallest components for maximum protection in public facilities
The consistent monitoring of air quality using sensor technology may sound complex to implement, but it has measurable positive effects in terms of patients’ health, the health of staff, prevention of hospital-acquired infections, comfort & well-being and an effective medical care. Overall, clean air is an essential part of high-quality environment also in further public buildings and institutions.
JUNE 2024 | ELECTRONICS FOR ENGINEERS 19
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