Experiment

Časová dotace: 10 min.

Monitor kvality vnitřního klimatu

Popis experimentu

Ze stavebnice HARDWARIO TOWER si postavíme monitor kvality vnitřního klimatu. Zařízení nám umožní měřit koncentraci oxidu uhličitého (CO2), koncentraci organických těkavých látek (VOC), teplotu a relativní vlhkost. Komunikace bude probíhat bezdrátově do Radio Dongle zasunutého do USB portu počítače. Naměřená data budeme zobrazovat v aplikaci HARDWARIO Playground, resp. v dashboardu vložené aplikace Node-RED.

V rámci experimentu pochopíme:

že teplý vzduch stoupá vzhůru a proč
co to je relativní vlhkost, rosný bod a TH index
že standardní koncentrace CO2 ve venkovním prostředí je 400 ppm, tzn. 0,04% a že v nevětrané místnosti se bude zvyšovat a že při vyšších koncentracích negativně ovlivní naši výkonnost
že CO2 je těžší než vzduch
že VOC jsou organické těkavé látky, měří se v ppb a akceptovatelná koncentrace TVOC (VOC celkově) je 500 ppb (0.00005%)

Kroky experimentu

Postavení monitorovací jednotky
Instalace aplikace Playground
Připojení jednotky k Playgroundu
Nastavení funkcí monitoringu a zobrazení dat

Měření teploty, vlhkosti, CO2 a VOC

Postavení monitorovací jednotky

Moduly v sestavě:

Core Module
Battery Module
CO2 Module
Display Module
Temperature Tag
Humidity Tag
VOC-LP Tag

Instalace aplikace Playground

Připojení jednotky do Playgroundu

Zasuňte do USB portu svého počítače Radio Dongle
Otevřete aplikaci Playground a běžte na záložku Devices
Vyberte z listu USB zařízení váš Radio Dongle a klikněte na Connect
Klikněte na Start pairing
Vložte do jednotky baterie

Nastavení funkcí monitoringu a zobrazení dat

Přepněte se na záložku Functions
Proveďte import flow

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Přepněte se na záložku Messages, pokud vše proběhlo správně, tak byste měli vidět příchozí zprávy z jednotky
Přepněte se na záložku Dashboard, pokud vše proběhlo správně, tak byste měli vidět budíky s aktuálními naměřenými hodnotami teploty, vlhkosti, CO2 a VOC. Pozn.: 1. Pro urychlení odeslání dat na jednotku dýchněte 2. Jednotka měří teplotu, vlhkost a VOC každých 5 sekund, CO2 pak každých 15 sekund 3. Jednotka odesílá data každých 15 min. 4. Jednotka odešle data ihned, pokud dojde mezi dvěma měřeními k nárustu vyššímu než 0,2 °C u teploty, 5 % u relativní vlhkosti, 50 ppm u CO2 a 5 ppb u TVOC.

Měření teploty, vlhkosti, CO2 a VOC

Zasoutěžte si v týmech kdo vlastním dechem vygeneruje nejvyšší teplotu Otázka pro tým s nejnižší teplotou Proč teplý vzduch stoupá vzhůru?
Porovnejte si mezi týmy naměřenou vlhkost Otázka pro všechny týmy Naměřená vlhkost je relativní vlhkostí. Vysvětlete pojmy relativní vlhkost a rosný bod.
Porovnejte si mezi týmy naměřené koncentrace CO2 a VOC Otázka pro všechny týmy Čím vysvětlíte rozdíly v naměřených hodnotách?

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