Sunday, August 13, 2017

Flir-one pro IR camera

Photo of a slot supply diffuser with two small water leaks in blue on the lower right - N. Carlson
I have been pleased with the original FLIR ONE IR cell phone camera attachment and decided to upgrade to the FLIR ONE PRO as the resolution was increased by a factor of four and the upper end of the temperature range increased to 400C.  

Notes: The Android phone adapter is a C connection which has a benefit in that the camera can be orientated front or back.  The attachment will require an adapter for older phones like the Samsung J7 or the S5. The type of adapter will depend on the type of phone.  After my first attempt at purchasing an adaptor failed, I contacted FLIR and they identified the specifications for the adaptor.  I needed an Type C OTG Adapter, USB C Female to Micro USB Male OTG (On the Go) Converter Charging Data Sync Adapter . It cost less than $10. 

Issues: The FLIR ONE app will occasionally freeze up or fail to recognize the attached camera.  This problem has become less common the more I use the camera.  The new FLIR ONE app is better than the original with some helpful videos on areas where the camera may be useful.  The variety of color pallets for viewing the image provides a way of selecting the best color temperature contrast. 

Supply air diffuser with spot temperature read out.  - N. Carlson
There will be more posts in the future as I get to know the instrument better.   

Cherry mold

Mold growth on red cherry - N.Carlson
Never pass up an opportunity to identify mold on food.  I purchased a bag of cherries a couple of days ago at a local grocery store.  The rest of the fruit I examined did not show mold growth.

I used a clear 3M red tartan Scotch tape with 85% lactic acid mixed with a small amount of lacto fuchsin stain. The photos were taken with a Samsung J7 camera using an AmScope microscope.

Growth of Alternaria spp. and Cladosporium spp. taken from a tease tape sample of the cherry - 400x - N. Carlson
This would be a fairly easy mold to identify for an introductory mold class.



Monday, June 5, 2017

Handwashing guidelines for Farms, Fairs, and Fun




Handwashing is important to minimize the spread of  germs when visiting a farm or a petting zoo this summer.  Information below is provided from UMASH and the Minnesota Department of Health. This UMASH site links to a printable pdf of the poster Don't Spread Germs - Wash Your Hands!




Handwashing video of approximately 2 and 1/2 minutes

Friday, June 2, 2017

Sunday, March 12, 2017

Water leak detection with FLIR one IR camera

IR image reveals blue areas noting water damage near bathroom water leak - N. Carlson

Infrared photo to the right of the door - N. Carlson
Part of the base cove has been removed in this photo to check for water damage.  Note that water damage is suggested by the lighter blue color in this FLIR one image in areas further to the right where the base cove has not been removed.

IR photo of same wall with a different color contrast - N. Carlson



Infrared imaging helps explain location of fungal growth on exterior wall


Flir One infrared image of exterior wall Feb 2017 - N. Carlson
The blue and purple colored areas are colder than the yellow and red areas on this infrared photo taken with a FLIR One infrared camera attached to a Samsung cellphone.


Dark areas of mold growth on an exterior sheetrock wall.
The space was used to store books and other materials.  The interior relative humidity was measured at 46%.  This allowed for condensation on the metal roof deck and for the equilibrium relative humidity on the sheetock over the metal studs to be greater than 70%. 

Energy collecting windows - U of Minnesota research


Luminescent Solar Concentrator - Steven Shimizu

Current silicon solar cells have an efficiency of 25%.  These cells are opaque (do not allow light to transmit through). Please see Standard silicon solar cell parameters (PV Education.org).

In a luminescent solar collector, the quantum silicon dots embedded or painted on transparent glass reflect light to the perimeter of the glass where solar collectors convert the light into energy.  This allows a window in a building to also work as a solar collector. Because silica is not an element in short supply, this allows for low cost and low efficiency (2.5 to 5%) solar energy collection. 
 
The U of M Brief publication article on Energy Collecting Windows now a Step Closer to Reality 
describes the process researchers used to construct the window based solar collectors. The abstract,
Highly efficient luminescent solar concentrators based on earth-abundant indirect-bandgap silicon quantum dots provides more information.  

The Clean Energy Institute lists resources and materials needed to construct a Luminescent Solar Concentrator.



Windows that collect solar energy - 2 min.