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Introducing disturbances to a chopped PIR sensor when investigating the performance in an office environment
KTH, School of Industrial Engineering and Management (ITM).
KTH, School of Industrial Engineering and Management (ITM).
2023 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Introduktion av störningar till en chopped PIR-sensor vid undersökning av dess prestanda i en kontorsmiljö (Swedish)
Abstract [en]

This master's thesis, conducted in collaboration with Knowit Connectivity, aims to develop a booking device for meeting rooms. The focus of the project is to identify and mitigate disturbances in the C-PIR sensor introduced by Haili Liu et al. The C-PIR is a modified version of a regular motion sensor that allows for both motion and stationary detection. The project's scope involves identifying disturbances to the C-PIR sensor from an office environment and calculating energy consumption savings in scenarios where the booking device is connected to surrounding electronics.

The results of this study indicate that other infrared radiating objects (such as computers, phones or hot cups) are a significant source of disturbance to the sensor in an unoccupied scenario, while non-infrared radiating objects (such as tables or chairs) are the primary source of disturbance in an occupied scenario. Additionally, the study found that the energy consumption savings for an average-sized meeting room were 0.23 kWh for a one-hour meeting.

Overall, this research provides valuable insights into the use of C-PIR sensors for meeting room booking devices, and the results have important implications for designing more efficient and accurate meeting room booking systems.

Abstract [sv]

Detta masterarbete, som genomförs i samarbete med Knowit Connectivity, syftar till att utveckla en bokningsenhet för mötesrum. Projektets fokus är att identifiera och minska störningar i C-PIR-sensorer som introducerats av Haili Liu et al. C-PIR-sensorn är en modifierad version av en vanlig rörelsesensor som möjliggör både rörelse- och stillasittande detektering. Projektets omfattning innefattar att identifiera störningar i C-PIR-sensorn från en kontorsmiljö samt att beräkna energibesparingsmöjligheter i scenarier där bokningsenheten är ansluten till omgivande elektronik.

Resultaten av denna studie visar att andra objekt som utstrålar IR (såsom datorer, surfplattor och varma koppar) är en betydande källa till störningar för sensorn i en upptagen situation, medan objekt som inte utstrålar IR (såsom bord och stolar) är den primära källan till störningar i en ockuperad situation. Dessutom visar studien att energibesparingarna för ett genomsnittligt stort mötesrum var 0.23 kWh för ett en timmes möte.

Sammanfattningsvis ger denna forskning värdefulla insikter om användningen av C-PIR sensorerför bokningsenheter för mötesrum och resultaten har viktiga implikationer för utformningen av mer effektiva och exakta bokningssystem för mötesrum.

Place, publisher, year, edition, pages
2023. , p. 94
Series
TRITA-ITM-EX ; 2023:460
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-333194OAI: oai:DiVA.org:kth-333194DiVA, id: diva2:1784557
External cooperation
Knowit Connectivity
Educational program
Master of Science in Engineering - Design and Product Realisation
Supervisors
Examiners
Available from: 2023-07-27 Created: 2023-07-27 Last updated: 2023-07-27Bibliographically approved

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CiteExportLink to record
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