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AssigneeBio-Melktechnik Hoefelmayer & Co.
InventorTilman Hoefelmayr
Estimating the term…
A method and a device are presented with which an analysis sample of less than 50 ml can be extracted from a milk flow having an amount which is proportional, even for cows having an expected total milk amount of up to 30 kg as well as an expected maximum milk flow of 12 kg per minute. The method is characterized in that by using a valve controlled in cycles, whereby each cycle comprises a valve opening time and a valve closing time, for extracting simply an analysis sample held below a predetermined maximum amount of 50 ml from the expected value of the total milk amount to be milked from the particular cow gained from experience, a cycle time and a valve opening time are determined, whereby the cycle time and the valve opening time are respectively chosen in such a way that they lie within a predetermined range of values, that the valve opening time or the cycle time is controlled in dependence of the milk flow, and that to avoid the values of the valve opening time or the cycle time lying outwith the range of values as a result of a change in the milk flow, the valve opening time and the cycle time are changed in the same proportions to the values lying within the range. The device with which such a milk sample extraction can be carried out with, comprises a milk flow measuring device, a processor unit and a milk sample extracting device which substantially comprises an electrically controllable magnet coil with which a sealing body is moveable to a first position closing the through flow opening for the sample separating stream and a second position releasing this opening.
A device for extracting an analysis sample amount of milk from the milk flow milked from a cow, the analysis sample amount being proportional to the amount of milk which has been milked from the cow, whereby sample partial amounts are extracted from the milk flow dependent on the milk flow, comprising a fluid duct for transporting milk, a valve within said fluid duct, and a means for controlling said valve in cycles, each cycle including a valve opening time and a valve closing time, said valve opening time extracting said partial analysis sample amount, said controlling means having a means for storing a predetermined maximum of said analysis sample, a means for determining an expected total amount of milk to be milked from the particular cow based upon prior total amounts milked from the particular cow, and means for determining said valve opening time, said valve closing time, and a cycle time defined by said valve opening time and valve closing time, said cycle time and said valve opening time being determined to lie within a specified range of values, said controlling means determining one of said valve opening time and said cycle time dependent on the milk flow within said milk duct, and said determining means changing said valve opening time and cycle time in a ratio equal to values lying within said specified range.
A milk sample extracting device for extracting a milk sample from milk flow milked from a cow, comprising a milk duct for transporting milk, a hollow housing connected in said milk duct, a milk flow measuring device positioned in said milk duct, a sample flow opening in said hollow housing, a valve assembly for selectively blocking and releasing said opening, an analysis sample container connected to said valve assembly for receiving the milk sample through said opening, and a processor means for controlling said valve assembly, said milk flow measuring device electrically communicating with said processor means, said valve assembly including an electrically controllable magnetic coil and a sealing body within said hollow housing moveable between a first position blocking said flow opening and a second position releasing said flow opening in response to an operation of said coil, and said processor means including a means for controlling a valve open time with said sealing body being in said second position and a cycle time of said sealing body dependent upon a measured value of milk flow from said milk flow rate measuring device, said controlling means keeping said valve open time and said cycle time within a range of values and changing said valve open time and said cycle time in a ratio equal to values within said range.
Dependencies are inferred from the claim text.