Peter Berx

Peter Berx

Apr 30, 2017

Group 6 Copy 76
1

Bijna klaar... Almost ready...

English text below

Kurt werkt naarstig verder en legt de laatste hand aan de aansluiting van de load cells en IR sensoren in de meetpoort. De grootste uitdaging was het kalibreren van de load cells: ze zijn zo gevoelig dat trillingen, temperatuurschommelingen en luchtverplaatsingen al een invloed kunnen hebben op de metingen. We hebben dan ook een kleine aanpassing doorgevoerd: de buitenste load cells zullen niet worden gebruikt om te wegen maar zullen fungeren als "referentie", waar de metingen van de andere acht mee zullen worden vergeleken. Op die manier hopen we de impact van externe factoren te kunnen verkleinen. Een ander fenomeen waar me mee te maken kregen was dat de load cells na een meting niet direct terug naar de "nulwaarde" terugvielen. Dat is een probleem omdat de bijen op sommige momenten erg snel achter mekaar de tunneltjes passeren en de load cells heel snel moeten reageren. Met de twee "referentie load cells" hopen we ook dit probleem te counteren. De eerste testen zijn in ieder geval bemoedigend. Zeer binnenkort kunnen we de load cells testen met levende dieren. Hiervoor worden geen bijen gebruikt: die kunnen vliegen en steken. In labo omstandigheden is het gebruik van meeltorren (Tenebrio molitor) veel gemakkelijker.

Bekabeling load cells meetpoort - Gateway load cells wiring

Load cells aangesloten - Load cells connected

Nederlandse tekst boven

Kurt is werking hard and is finishing the load cells and IR sensors connections in the gateway. The biggest challenge was the calibration of the load cells: their sensitivity to vibrations, temperature changes and small air currents can severely affect measurements. So we made an alteration to the setup: the two outer load cells will not be used for weighing but well serve as "references", to which the other eight load cells will be compared. We hope to minimize the effect of external factors that way. An other difficulty we ran into was that load cells after measurement took several minutes to go back to base value. That poses a problem since bees will pass the tunnel very close after each other and the load cells have to react very quick to be able to distinguish between individual bees. Wit the two "reference load cells" we hope to counter that effect as well. First test are encouraging. Very soon, we will be able to test the whole setup with live animals. We will not use bees in the lab because they are difficult to handle: they fly and sting. In stead, we will use adult mealworms (Tenebrio molitor).

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  • NancyPSmith
    NancyPSmith
    Really informative blog post.Really looking forward to read more. Really Cool.
    Mar 16, 2019

About This Project

Bee station & Insect Museum Lieteberg

The aim of this study is to connect foraging activity of honey bees (Apis mellifera) to incoming food supply (nectar and pollen). With the use of sensors, weight trackers and counters, we'll track foraging bees entering or exiting the hive, as well as conditions in the hive. This information will tell us more about how changes in the food supplies and quality, such as from climate change or pesticide intake, can affect foraging, colony growth and colony health.

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