RU2732586C1 - Device for measuring individual milk yield - Google Patents

Abstract

FIELD: agriculture.SUBSTANCE: invention relates to agriculture, namely, to devices for measurement of quarter milking and total milk yield during milking. Proposed device comprises alternating-current pulse generator. Milk flow presence detector is made in the form of four pairs of electrodes, which in pairs form four measuring channels of a quarter milk yield. In each channel there is a comparator, an integral time counter, a unit of correction factor and an indicator of the quarter milk yield. Total yield from all quarters is displayed on total milk yield indicator.EFFECT: use of the invention will make it possible to increase the period of productive use of animals, as well as to increase the quantity and quality of downed milk.1 cl, 1 dwg

Description

The invention relates to agriculture, in particular to devices for measuring the individual milk yield, mainly when milking cows.

Known device for measuring milk yield, containing a measuring chamber with electrodes, means for separating air, leakage and indicator of milk yield [1]. The device is designed to measure the flow of milk from all quarters of the udder mixed with air. It is located at the outlet of the milk hose, which significantly increases the hydraulic resistance of the outflow tract.

Known device for measuring individual milk yield, containing a bucket counter and an electronic control unit [2]. The main disadvantage of this device is the complication of the transport path, in which a bucket meter is additionally installed to account for the total volume of milk from all quarters.

It is also known a device for accounting for milk [3], containing a flow transducer, electrodes and a computing mechanism. This device records milk in milk pipelines with random feed flows and is intended exclusively for group milk accounting when milking into a milk pipe.

The closest in technical essence is a device for implementing a method for measuring individual milk yield [4], containing an alternating current pulse generator, an electrode flow sensor and a time counter.

The disadvantage of this device is the installation of a flow sensor at the end of the technological path of its transportation, i.e. the measurement is carried out by the converted flow, moreover, it is impossible to use this device with the lower location of the milk line. Moreover, to eliminate multiple counting of milk portions at low milk intensity, it is necessary to install a check valve or a controlled shut-off valve, which structurally complicates the milk transportation path and increases its hydraulic resistance.

The aim of the invention is to develop a device for measuring individual milk yield, capable of determining the quarter and total milk yield without interfering with the process of extracting milk from the teat of a cow's udder and with the technology of transporting it into the milk pipeline.

This goal is achieved by the fact that in a device for measuring individual milk yield, containing an alternating current pulse generator, an electrode flow sensor and a time counter. An electrode flow sensor is installed in the milk chamber of the milking machine manifold. It is made in the form of four pairs of electrodes, and the electrodes in pairs in a plane passing through their longitudinal axes are installed at an acute angle to each other in the direction of the corresponding milk pipe. The device contains four comparators, four time counters, which are integral, four blocks of constant coefficient, four quarter-yield indicators, an adder and an indicator of total milk yield. Each pair of electrodes forming one of the four measuring channels is connected in parallel with one electrode to an alternating current pulse generator, and the other electrode is connected to an adder through a comparator, an integral time counter, a constant coefficient unit and a quarter-milk indicator, connected in series. The total milk yield indicator is connected to the adder output.

It is technically difficult to measure the transit time of a portion of milk directly at the exit from the teat of the udder of a cow without significant constructive intervention in the design of the teat cup. The installation in the milk chamber of the milking machine collector of an electrode flow sensor made in the form of four pairs of electrodes, which are installed in pairs in a plane passing through their longitudinal axes, are installed at an acute angle to each other in the direction of the corresponding milk pipe, makes it possible to bring four measuring channels of presence milk to the teat of the udder, without interfering with the process of extracting milk from the teat of the cow's udder and the technology of transporting it into the milk pipe. Since the distance from each teat of the udder to the electrode sensor for the presence of milk installed in the milk chamber is relatively small, there is an uninterrupted movement of the milk flow within the distance inside the teat liner and the duration of each sucking stroke:

Q = Q _to ,

where Q and Q _to - respectively, the flow rate of milk at the exit from the udder teat and at the entrance to the collector (design section), m ³ / s.

Installation of each pair of electrodes in a plane passing through their longitudinal axes, at an acute angle to each other in the direction of the corresponding milk branch pipe and making conical electrodes also in the direction of the milk branch pipe provide a decrease in the distance between the electrodes as they approach the milk branch pipe and, conversely, increase as you move away. The convergence guarantees the closure of the electrodes at a low intensity of milk supply, and the divergence prevents a drop of milk from hanging between them at a low intensity and thereby a false closure of the electrodes.

The presence of comparators in each measuring channel makes it possible to clearly control the switching on and off of integral time counters, i.e. exclude from the time of each sucking stroke the period of time during which milk is not removed from the teat of the animal's udder.

The implementation of integral time counters provides an integral (cumulative total) accounting of the time of passage of milk from a given quarter during milking. The installation in each of the four measuring channels after the integral time counter of a block of a constant coefficient and an indicator of a quarter milk yield, connected in series, makes it possible to additionally control the milk yield of each quarter and more accurately determine the total milk yield in the future, since each channel is equipped with a correction coefficient unit determined experimentally.

The block of the correction factor enters the scale of the milk yield for each quarter when recalculating the integral duration of milk intake in the quarter milk yield, taking into account the correction factor. The totalizer provides the summation of the quarter milk yields from all four udder lobes. The total milk yield indicator displays the total milk yield.

Thus, the set of essential features is new, meets the criterion of "inventive step" and ensures the achievement of a technical result: measurement of the total milk yield, based on the measurement of quarter milk yield separately from each share of the udder without interfering with the process of extracting milk from the teat of the cow's udder and the technology of transporting it into the milk pipe.

This invention is illustrated by a drawing.

FIG. 1 shows a block diagram of a device for determining the individual milk yield.

The device for determining the individual milk yield contains an alternating current pulse generator 1, an electrode sensor for the presence of milk, made in the form of four pairs of electrodes 2. Electrodes 2 of the sensor for the presence of milk in pairs in a plane passing through their longitudinal axes are installed in the milk chamber of the milking machine collector under the sharp at an angle to each other in the direction of the corresponding milk branch pipe below and opposite each of the milk branch pipes of the milking machine manifold (the milking machine manifold is not shown in the figures of the graphic material). Each pair of electrodes 2, forming one of the four measuring channels, is connected in parallel with one electrode to the alternating current pulse generator 1, and with the other electrode through a comparator 3, an integral time counter 4, a correction factor unit 6 and a quarter-milk yield indicator 8, connected in series, is connected to totalizer 5. The total milk yield indicator 7 is connected to the totalizer output.

A device for measuring individual milk yield works as follows.

During the sucking stroke, milk from each teat of the cow's udder through the milk tube of the teat liner enters the milking machine manifold and closes the pair of electrodes 2 corresponding to the measuring channel. The pulse from the alternating current pulse generator 1 reaches the comparator 3 and is compared with the threshold value. When the threshold value is exceeded, the comparator 3 sends a signal to the integral time counter 4, which turns on and measures the transit time of a dose of milk from the teat of the udder of a cow per sucking stroke of the working cycle of the milking machine. Comparator 3, when the milk intensity drops below the critical one, turns off the integral counter of the time until the next portion of milk of the next brewing cycle with an intensity higher than the critical one. From the integral time counter 4, each measuring channel, the integral time intervals for the presence of milk on the electrodes of the sensor 2 are fed to the correction factor block 6, in which they are multiplied by the scale of the milk yield and the correction factor, and then in each measuring channel they are fed to the indicators of the quarterly milk yield 8. Then milk yield from each of the four channels of a quarter is fed to the adder 5 and summed up. The total milk yield from all quarters is displayed on the total milk yield indicator 7.

The use of the proposed device for determining the individual milk yield will allow in real time to control and determine the current and final values of the quarter and total milk yield without interfering with the process of extracting milk from the teat of a cow's udder and into the technological line of its transportation into the milk pipeline.

Literature

1. Pat. 2400973 RF, IPC А01J 5/00. Milk flow measuring device / T.K. Lyndholst; X. Poulsen (DC). - No. 2008104818/12: Declared 10.07.2006: Published 10.10.2010.

2. Pat. 2044472 RF, IPC А01J 7/00. Method of individual milk accounting with automatic correction of the error in determining milk yield and a device for its implementation / Yu.A. Choi; A.I. Zelentsov; V.V. Kirsanov; A.A. Gerasenkov (RF). - No. 5046954/15: Stated 04/09/1992: Published 09/27/1995.

3. Pat. No. 2444182 RF, IPC А01J 7/00 Device for accounting of milk in milk pipelines of livestock farms / F.G. Maryakhin; A.I. Uchevatkin; B.P. Korshunov; A.B. Korshunov; B.C. Koptev; A.V. Vlasov (RF). No 2010123688/13: Declared 06/10/2010: Published 03/10/2012.

4. Pat. 2093982 RF, IPC А01J 7/00. Method for measuring milk consumption and a device for its implementation / Tillman Hefelmayr; Jacob Mayer Yun (DE). - No. 5011377/02: Declared 03/26/1992: Published on 10/27/1997.

Claims (1)

A device for determining the individual milk yield, containing an alternating current pulse generator, an electrode sensor for the presence of milk flow and a time counter, characterized in that the device contains four comparators, four integral time counters, four blocks of the correction factor, four quarter-yield indicators, an adder and an indicator of total milk yield, and the electrode sensor for the presence of milk flow, mounted in the milk chamber of the milking machine manifold, is made in the form of four pairs of electrodes, which are installed in pairs in a plane passing through their longitudinal axes at an acute angle to each other in the direction of the corresponding milk pipe , wherein each pair of electrodes forming one of the four measuring channels is connected in parallel with one electrode to an alternating current pulse generator, and the other electrode is connected through a comparator, a time counter, a correction factor unit and a quarter-milk yield indicator , connected in series, to the adder, to the output of which the total milk yield indicator is connected.

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