beehive_iteration_2015
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beehive_iteration_2015 [2015/03/23 14:53] – [BEEHIVE ITERATION-2015] ami | beehive_iteration_2015 [2015/04/27 12:19] – [Sensors for Vibrations] ami | ||
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=====BEEHIVE ITERATION-2015===== | =====BEEHIVE ITERATION-2015===== | ||
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- | The Urban BeeLab group is a collaboration between an artist, computer engineers, electronical engineers and a biologist. | + | The Urban BeeLab group is a collaboration between an artist, computer engineers, electronical engineers, a beekeeper |
Our group is currently working on fabricating a new iteration of a supersensory beehive. The interface for monitoring consists of an IR camera, IR led lights, a grid of temperature sensors and contact microphones. | Our group is currently working on fabricating a new iteration of a supersensory beehive. The interface for monitoring consists of an IR camera, IR led lights, a grid of temperature sensors and contact microphones. | ||
We presume that the sensor data collected through our interface will allow us to decipher the capacities of the bee colonies in urban environments. | We presume that the sensor data collected through our interface will allow us to decipher the capacities of the bee colonies in urban environments. | ||
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+ | =====Hive 2015 - phase#3: BeeMedia===== | ||
+ | - asus | ||
+ | - Rasp Pi problems alimentation - solved | ||
+ | - chrome problems | ||
+ | - 8 temp. sensors connected | ||
+ | - audio on top | ||
+ | - piezo' | ||
+ | - accellero ready | ||
+ | - IR cam lens 3.6mm | ||
+ | - Led lights in windowframe | ||
- | =====Sensors for Sound & Vibrations===== | + | => temp. sensors visualising in opensensordata + identification (1->8) and calculations |
- | via bee knees/ | + | => accelerometer, |
+ | {{gallery>:: | ||
+ | |||
+ | \\ | ||
+ | =====Sound===== | ||
+ | After analysis (by Guy De Bièvre) of the recorded soundfiles (2014 project), the conclusion is that there is a bad electrical hum (50Hz and the first harmonic 100Hz) dominating. This probably caused by a power supply somewhere along the line (can be in the hive, but could also be inside near the mixing desk). Best would be to get rid of it physically (finding the guilty source and moving it away from the microphone cables). Another solution (even better if you can combine it with removing the source of the problem) is to shorten the microphone cables by adding a preamp near/in the hive and to start from there on line level, preferably symmetric...simplest way to do that is to get a small mixing desk and set it up near/in the hive and leave from there with a balanced output (a balanced/ | ||
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+ | If you cannot solve this issue physically you should add a 50Hz comb filter patch to the software setup (a 50Hz comb filter will radically/ | ||
+ | I will add screen dumps (to the upload) of the spectrum analyzer, before and after filtering...the hum are those continuous equidistant lines. I ran the the 4 files you gave me through a FFT 50Hz removal (most software has 50Hz removal presets, because it is such a common issue, though US software will have a, for us useless, 60Hz filter), getting rid of most of the hum and a hi-pass reducing everything below 70Hz, to get rid of the " | ||
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+ | {{: | ||
+ | // | ||
+ | |||
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+ | \\ | ||
+ | |||
+ | =====Sensors for Vibrations===== | ||
+ | via bee knees/ | ||
* install phidgets.com - USB sensing and control http:// | * install phidgets.com - USB sensing and control http:// | ||
* electret microphones should be installed at the entry of the hive, as well as on other strategic spots in the hive | * electret microphones should be installed at the entry of the hive, as well as on other strategic spots in the hive | ||
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* environmental sensordata have to be send once per minute to the server (now every 15') | * environmental sensordata have to be send once per minute to the server (now every 15') | ||
* check that we can put the IR and motion detection camera' | * check that we can put the IR and motion detection camera' | ||
- | \\ | + | |
+ | phidget logging info: | ||
+ | * Alle drie de assen van de sensor | ||
+ | * Sampling frequentie 1000Hz (de sensor is toch niet gevoelig voor hogere frequenties). Dat spaart een hoop data. | ||
+ | * Sampling resolutie: maximaal wat de sensor aankan. | ||
+ | * Indien er een keuze is voor verschillende ranges van g-waarden: de gevoeligste (het gaat ons immers om kleine trillingen). | ||
+ | Later kunnen we op die rauwe data wel filters loslaten. | ||
=====Cleansing Flights, early spring===== | =====Cleansing Flights, early spring===== | ||
{{gallery>:: | {{gallery>:: | ||
beehive_iteration_2015.txt · Last modified: 2016/01/13 17:48 by 127.0.0.1