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Compact mobile photoanalyzer of milk quality, which determines the amount of fat and crude protein.

What it does

Compact mobile photoanalyzer of milk quality, which determines the amount of fat and crude protein.

Your inspiration

Milk is a product of prime necessity, which is the basis of children's and adult food. Production and sale of low-quality and fake products affects the people’s health. This means that the control of milk quality is a major term of healthy eating problems. Often milk analyzers are the overall and expensive machines that are only available for large factories. Therefore, our aim was to develop a low-cost compact analyzer.

How it works

Scanomilk is a plastic cylindrical box, which consists of 2 parts, and its height is 10 cm and diameter is 8 cm. Outside of the upper part there is located a power button and a touch screen and inside of the upper part there is a 13 MPX camera. Inside of lower part there is Petri dish with a diameter of 4 cm, under the Petri dish there is located a two-color LED with 2 emission wavelengths - 550 nm and 620 nm. After software starts, we can specify the color of the LED light at the lower part of the box and take a series of images with a camera on upper part of the box. How it works? 1) 7.5 ml of homogenized milk is added in a Petri dish. 2) One after another, series of images are taken from each of the LEDs. 3) Images are analyzed and compared with the standard from the memory by the software. 4) The screen displays the result. The diameter of red and green spots indicate the fat or crude protein concentrations.

Design process

This project is a solution for the problem of the International Natural Sciences Tournament (Russia, Saint Petersburg). While analyzing the literature, we have seen a few notes on the analysis of milk by light of different wavelengths and have conducted a series of experiments. We mounted the camera on a tripod, set the Petri dish under the lens, and the light guide, which was connected to a box with red and green LEDs under the Petri dish. After taking a series of images of different samples of milk with the red and green LEDs, we noticed that the diameter and brightness of colored circles was different. The calibration became our next step. We took the series of images using the «GOST» milk with fat content of 3.2%. 5 images was obtained from each of the light source with exposure times of 1, 1/2, 1/4, 1/8 and 1/16 s. Then we have checked other samples with a fat content of 3.2% in the same conditions. After transferring it into the format 1024 x 1024 there were received intensity distribution histograms for all images, which were analyzed by the method of concentric rings. The experiments have shown the efficacy of this method and the prospect of creating a compact analyzer.

How it is different

The unique features of the proposed project are the compact size of the analyzer, low cost, simple method of analysis. According to preliminary calculations, the cost of one analyzer will be about $100, which in hundreds of times cheaper than used analyzers.

Future plans

We are planning to move from laboratory studies to the creation of the first prototype, which determines the content of fat and crude protein. In case of success, we will present it to potential buyers. We also want to continue the research and determine what other wavelengths define the components of milk. These studies are necessary to improve the selection and increase the accuracy of the analysis.


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