Sensors for Building Automation:

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1 Sensors for Building Automation: Some Aspects from Fire Safety

2 Example: Particle pollution Air quality monitoring using smoke sensors PM10 concentration [µg/m3] Offical PM source: Aspirating Smoke Detector with IR blue light sources RECEIVER CELL IRIS BLUE PROJECTOR Source: M. Fischer, S. Künzli, Siemens page 2/9 < < < < < < < < < < < < < < < < < < < < < < < < scattered light SMOKE PARTICLE IRED PROJECTOR

3 Sensors in spot type fire detectors Single-Sensor Detectors Multicriteria/Multi-Sensor Detectors Ionization electric (CO) page 3/9 Ionization CO 2 CO RH Radiation n? Video

4 Development path of spot type fire detectors Single-Sensor Detectors Multicriteria/Multi-Sensor Detectors Ionization electric (CO) Nuisance Alarms page 4/9 Ionization CO 2 CO RH Radiation n? Video Sensitivity to fires

5 A Multi-Sensor Fire Detector Temperature sensor Receiver (photoelectric (photodiode) cell) Light IR light source (backward) CO sensor (monitored) Light IR light source (forward) Temperature sensor Signals available for other systems: - Obscuration [%/ft] - Temperature [ F] - CO concentration [ppm] Multicriteria Fire Detection CO life safety ON/OFF control signal for T and CO page 5/9

6 Sensor integration: Fire-gas detection Research platform for fire gas detection Integrated gas sensors 1... n Temperature C Processing Alarming Tx/Rx Rel. Humidity % D. Gutmacher et al.,siemens AG, sensor technologies for fire detection, Sens. Actuators B: Chem. (2011), doi: /j.snb Single chip page 6/9

7 Fire safety sensors Data Sharing with other Building Systems Data (signal) availability and reuse: fire sensors other systems HVAC, security, and other sensors fire sensing Connectivity Reliability and information validity (Alarm suppression?, Control signals?) Sensor positioning Special applications (data centers, industrial plants, ) Standardization page 7/9

8 A lot of work (to be) done in standardization Sensor characterization in multi-sensor detectors Research in detection of different fire phenomena EN fire tests: Limits for ALL sensed phenomena Test End Criteria for Obs, T and CO Existing: Obs vs. Time Exisitng: Obs vs. MIC Real-world fires vs. fire tests Changing materials Standard UL268: Multicriteria smoke detectors New PU foam fire tests New EN-Standards: EN54-29 (OT), -31(OTC)-> formal vote New: Carbon-monoxide vs. time page 8/9

9 Conclusions Integration of sensors already takes place, both on: Physical level (HW) Information (signal) level Fundamental topics require systematic approach: Research in detection of different fire phenomena Information availability and reuse Connectivity Sensor- and Information Reliability Companies offering broad building automation portfolios predestined to be key drivers in the sensor integration in automated buildings, both in: technology and standardization page 9/9

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