Ysebaert Dairy

Dairy Division

DAS-M

The quality control from the farm up to the final product

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Automatic system of milking machine monitoring

The availability of more powerful, small and very fast data acquisition systems has been completed in the last years by the introduction on the market of a variety of small size, fully portable and battery operated Personal Computers called Notebooks.

On the other hand the automotive and the aerospace industry have created the request for a wide range o sensors o any kind, able to convert a physical parameter into electric signal: for example a pressure signal may be easily transduced in a voltage value that can be monitored on a scope, digitised and displayed on a meter or recorded.

The combination of the above mentioned electronics devices has been applied for the first time to create a test system which can perform the full mechanical test of a milking machine installation according to the ISO 6690 International Standard and that offer a solution to the growing request to test quite frequently in order to improve the way of operation and to prevent failures.

Our engineers have gathered in a single case all the measuring functions that previously were done by a series of instruments: the pulse - graph recorder, the flow - meter, the gauge, the asameter and they also created to perform all the measurements required by ISO recommendations.

Preliminary set-up

The first page of the menu is used to choose the different tasks the user wants to operate:

I . Start a new test.

2. Review the results and the curves acquired during a previous test.

3. Save the acquisition of the current test.

4. Get on the screen the operation manual of the unit.

5. Configure the system to set the right coefficients to have direct readings in engineering units and to select the best resolution for a printer.

6. Have all the simulated instruments available on the screen to calibrate them and to verify the right connection and operation.

7. Introduce the data of the plant to be tested and review the report to be printed.

8. Enter the test menu.

9. Exit the dedicated menu and return to Windows.

It is possible to see how the operator can set the specific engineering units (KiloPascal, litres/minute, etc) for all the connected sensors. It is also possible to set the threshold for the time acquisition on the pulsation curves and to choose the most appropriate resolution for the printer, according to the kind of curve or text that has to be printed.

Running the test

If TEST 1 has been chosen, for instance, the user has just to follow the prescriptions listed in the PREPARATION OF THE TEST headlines. Once they have been performed the operator is allowed to press the FIO acquisition pushbutton and to measure the data that are automatically stored in the memory and transferred to the report.

The TEST 8 is instead used to record the pulsation chambers vacuum curves. On the same display it Is also possible to compare the pulsation frequency stated by the manufacturer that can be stored by the operator and the measured frequency.

We have created a virtual high accuracy gauge using the sensor connected to the input I of the data acquisition system and displaying the measured value both in analogue and digital mode through the virtual gauge shown. In this way it is possible to combine the very high accuracy of the digital reading, the resolution is 0,0 I kPa, with the possibility to visually evaluate the increase or the decrease of the value of the pressure in a given point.

Dynamic tests

They are carried out during the milking. Dynamic tests allow knowing the milking plant duty on operative conditions. Using this option, it is possible to know on real time mean vacuum fluctuation on three different points of plant and to express a more accurate diagnosis about milkline and collector dimensions.

The innovation of DAS-M is the possibility to connect to the milking plant three sensors at least, in order to have vacuum fluctuation values at the same time and on three points (milkline, airline near the sanitary trap and collector).

Results print out

It is possible to print using a parallel printer all the reports (The stored data of the plant (including manufacturer, model, owner, type, etc.), the acquired measurements, the stored pulsation curves on the acquired measurements just connecting it through a cable to the connector PRINTER on the front panel.

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