CA2680781A1 - A device for measuring an electrical parameter in milk and a milking apparatus including such a device - Google Patents
A device for measuring an electrical parameter in milk and a milking apparatus including such a device Download PDFInfo
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- CA2680781A1 CA2680781A1 CA002680781A CA2680781A CA2680781A1 CA 2680781 A1 CA2680781 A1 CA 2680781A1 CA 002680781 A CA002680781 A CA 002680781A CA 2680781 A CA2680781 A CA 2680781A CA 2680781 A1 CA2680781 A1 CA 2680781A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/04—Dairy products
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J5/00—Milking machines or devices
- A01J5/013—On-site detection of mastitis in milk
- A01J5/0133—On-site detection of mastitis in milk by using electricity, e.g. conductivity or capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/08—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid which is flowing continuously
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- Medicinal Chemistry (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Measuring Volume Flow (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
A device for measuring of an electrical parameter in milk, arranged in a substantially vertical milk flow conduit of a milking apparatus, which device comprises a measuring chamber (9, 19) having at least two electrodes (2, 12). Milk is intended to flow in an upward direction in the conduit, and the measuring chamber is closed in an upward direction and has a downwardly directed opening for entry and exit of milk, and will thus be filled with milk when milk flows through the device, and will instantly empty when the milk ceases to flow. The invention also relates to a milking apparatus for milking of an animal, which comprises such a device.
Description
A device for measuring an electrical parameter in milk and a milking apparatus including such a device.
Technical field The present invention relates to a device for measuring an electrical parameter in milk. The device is indented for arrangement in a substantially vertical conduit of a milking apparatus, and comprises a measuring chamber having electrodes. The in-vention also relates to a milking apparatus comprising such a device.
Background of the invention The measurement of an electrical parameter, such as electrical conductivity, is of importance in the field of milking, since it can be used as a means for detecting in-fections such as mastitis in dairy animals. When milk is affected because of mastitis or milk fever, the electrical conductivity of the milk is changed. Mastitis infections in dairy animals can thus be diagnosed based upon the altered pattern in the electri-cal conductivity of the milk which, in the case of a mastitis infection is substantially increased in a characteristic way. The electrical conductivity can be measured, for example, by means of electrodes between which an A.C. or D.C. voltage prevails. In order to obtain comparable conductivity values between different measuring occa-sions, the measurement of the conductivity should be performed on a known vol-ume. The measuring electrodes should thus preferably be arranged such that the measuring volume is substantially the same in each measuring occasion, so that comparable values of the electrical conductivity can be obtained.
Various arrangements for measuring of conductivity in milk are known in the art.
Electrodes for measuring the conductivity are typically mounted in a sample cham-ber, in which a milk sample can be received. For continuous in-line measuring, the sample chamber is normally arranged in the milking apparatus in a position between the teat cups and the milk line, and is filled with milk when a milk flow passes by.
Technical field The present invention relates to a device for measuring an electrical parameter in milk. The device is indented for arrangement in a substantially vertical conduit of a milking apparatus, and comprises a measuring chamber having electrodes. The in-vention also relates to a milking apparatus comprising such a device.
Background of the invention The measurement of an electrical parameter, such as electrical conductivity, is of importance in the field of milking, since it can be used as a means for detecting in-fections such as mastitis in dairy animals. When milk is affected because of mastitis or milk fever, the electrical conductivity of the milk is changed. Mastitis infections in dairy animals can thus be diagnosed based upon the altered pattern in the electri-cal conductivity of the milk which, in the case of a mastitis infection is substantially increased in a characteristic way. The electrical conductivity can be measured, for example, by means of electrodes between which an A.C. or D.C. voltage prevails. In order to obtain comparable conductivity values between different measuring occa-sions, the measurement of the conductivity should be performed on a known vol-ume. The measuring electrodes should thus preferably be arranged such that the measuring volume is substantially the same in each measuring occasion, so that comparable values of the electrical conductivity can be obtained.
Various arrangements for measuring of conductivity in milk are known in the art.
Electrodes for measuring the conductivity are typically mounted in a sample cham-ber, in which a milk sample can be received. For continuous in-line measuring, the sample chamber is normally arranged in the milking apparatus in a position between the teat cups and the milk line, and is filled with milk when a milk flow passes by.
Examples of such devices are shown in WO 95/22888 and W099/18774, in which sample chambers are located in a milk claw. Milk enters the chambers from above and slowly drains away via a small opening provided in the bottom of the sample chamber. Another known device is shown in EP 0397274 A1, in which a sample chamber is provided, which is closed at the bottom, and the milk both enters and ex-its the sample chamber through an upper opening.
These and other hitherto known devices for measuring electrical conductivity in milk suffer from difficulties in drainage of the milk. In a sample chamber of the type shown in WO 95/22888 or W099/18774, the drainage opening must be small enough to retain a milk sample in the chamber. However, such a small opening eas-ily becomes clogged by fat agglomerations or dirt particles in the milk. In the type shown in EP 0397274 A1 a small amount of milk remains, also when the milk has ceased to flow through the device. The impeded milk drainage in the sample cham-ber is an obstacle in cleaning of the equipment and might also adversely affect the reliability of the measuring result.
Summary of the invention The present invention aims at providing an improved device for measuring of an electrical parameter for use in a milking apparatus, which does not suffer from the above disadvantages, but allows a reliable measurement and can easily be cleaned.
This is achieved according to the present invention by means of a device as set out in claim 1. This device is arranged in a substantially vertical milk flow conduit of a milking apparatus and comprises a measuring chamber having at least two elec-trodes. Milk is intended to flow in an upward direction in the milk flow conduit, and the measuring chamber is closed in an upward direction and has a downwardly di-rected opening for entry and exit of milk. The chamber will thus be filled when milk flows upwards through the device, and instantly empties through the opening, due to gravity, when the milk ceases to flow. When the measuring chamber is filled with milk, a signal can be obtained from the measuring chamber via the electrodes.
The signal can be used for evaluation of whether the animal suffers from a disease such as mastitis, by comparing the maximum value of the conductivity at different milk-ing occasions. The presence of a signal also reliably indicates the presence of a milk flow through the device. A signal will be given continuously during the passage of a milk slug through the device and will cease when the milk slug has passed since any small remaining amount of milk will directly drain from the measuring chamber.
The time period needed for the milk slug to pass through the device is thus easily detected, which together with the known volume of the milk conduit allows the milk flow volume to be calculated. Because the device is adapted to be arranged in a sub-stantially vertical milk conduit in which the milk flows upwardly, it is particularly useful in high-line milking applications, where the milk anyway must be must trans-ferred upwards to the milk line.
The measuring chamber is preferably arranged in the device such that when milk flows through the device the milk flow direction is changed. When the milk flow deviates from its original direction any air trapped in the measuring chamber will be dragged along with the milk flowing by and the chamber will accordingly be com-pletely filled with milk and no air is trapped in the chamber, and thus a reliable value of the electrical parameter is obtained. The device comprises a lower inlet passage, and an upper outlet passage for the milk flow. The measuring chamber is positioned such that its opening is positioned directly above the lower milk flow inlet passage, so that a milk flow entering the device is directed straight into the measuring chamber, which is delimited between an outer wall of the device and a protruding element that extends from the outer wall.
The device may further comprise a diaphragm valve, and the measuring chamber is then arranged prior to the diaphragm in the flow direction. The valve comprises a fluid chamber, which has a fluid inlet opening and a fluid outlet opening, which is directed towards the diaphragm, at the end of the milk flow outlet passage which ex-tends into the fluid chamber. The measuring chamber is positioned in the fluid chamber opposite to the diaphragm and underneath the outlet passage. This makes the device compact and effective, and several purposes can be fulfilled by means of a single piece of equipment, particularly when the end portion of the outlet passage, extending into the fluid chamber, is used as the protruding element confining the measuring chamber. The electrodes are preferably arranged in, and extend substan-tially horizontally through the outer wall, for easy mounting and access.
The invention also relates to a milking apparatus for milking of an animal, compris-ing a milking member 30 intended to be applied to the teats of said animal, a milk conduit 31 for transportation of milk from the milking member 30 to a milk line 32 that is located higher than the milking member, in which a device as described above is arranged in the milk conduit, such that the opening of the measuring cham-ber is directed towards the milking member 30.
Short description of the drawings In the following, embodiments of the present invention will be described, by way of example, with reference to the appended drawings, wherein Fig. 1 shows a cross-sectional view of a first preferred embodiment of the invention;
Fig. 2 shows a front view of a second preferred embodiment of the device, in which a diaphragm is not shown;
Fig. 3 shows a cross-sectional view taken on the line A-A in Fig. 2, in which the diaphragm is shown;
Fig. 4 shows a rear view of the device in Fig. 2;
Fig. 5 shows a perspective front view of the device in Fig. 2; and Fig. 6 shows a perspective rear view of the device in Fig. 2;
Fig. 7, shows schematically a milking apparatus comprising the device shown in Figures 1-6.
Detailed description of the invention The overall idea of the present invention is to provide in a milk conduit, a measuring chamber that is closed at the upper end and open at the lower end, whereby the inte-rior space of the chamber is easily accessed by upwardly flowing milk, and no risk of clogging exists and the chamber is very easy to clean.
The measuring chamber of the invention may be arranged in a milking apparatus, in practically any location between the teat cups of the milking member and the milk line, as long as it is arranged in a milk conduit in which the milk flows upwards in a substantially vertical direction. Throughout the following description the spatial ori-entation of the device is presupposed to be the same as when arranged in the sub-stantially vertical milk conduit. Accordingly a lower or bottom element of the device will be located closer to the milking member than an upper or top element.
In a first embodiment of the invention, shown in Fig. 1, the device 1 comprises a tu-bular portion inside which a measuring chamber 9 is arranged, which comprises two electrodes 2. The measuring chamber is delimited by a protruding element 3 extend-ing from the wal14 of the tubular portion. Milk enters the device from below through an inlet passage 5 and is directed straight into the measuring chamber 9.
The protruding element 3 is located in the flow direction of the milk and thus hin-ders the milk flow to continue in its original direction, and instead forces the milk flow to deviate and flow through the gap left in the tubular element beside the measuring chamber 9. The milk then leaves the device through an upper outlet pas-sage 6.
The measuring chamber 9 is closed in the upward direction by means of the protrud-ing element 3 and is open in the downward direction for entry and exit of milk. The protruding element 3 preferably includes a plurality of substantially vertical wall members 7 defining the side walls of the measuring chamber 9, and an upper wall member 8 defining the upper wall of the measuring chamber. In a particularly ad-vantageous alternative the upper wall member 8 is inclined such that is slopes, pref-erably along a parabolic curve, from the point on the wall from which it extends (at the back end of the measuring chamber) downwards to the opening of the measuring chamber. The measuring chamber 9 is thus upwardly tapered and is narrower at the upper back end, than at the opening, such that it is deeper in the area closest to the wall 4, and is rather shallow in the area near the lower portion of the upper wall member 8. This will enhance the efficiency of the milk flow into and out of the measuring chamber, as well as the removal of any trapped air inside the measuring chamber.
Figures 2-6 show a second embodiment of the invention, in which a vacuum regula-tion diaphragm valve (shut-off valve) is incorporated in the device 10. The valve in-cludes a fluid chamber 11 which encompasses a somewhat cup-shaped element 27 and a diaphragm 26. The diaphragm is shown only in Fig 3. The fluid chamber I
comprises a milk inlet opening 20 at its bottom, and a substantially tubular milk inlet passage 15 is attached to the inlet opening below the fluid chamber. A milk outlet passage 16 is arranged at the upper end of the fluid chamber. The outlet passage 16 is comprised of an upper substantially tubular portion mainly located outside the fluid chamber 11 and a lower extending portion 18, 21 located inside the fluid chamber. A milk outlet opening 22 from the fluid chamber I 1 is located at the end of the extending portion 18, 21, and the edge rim 23 surrounding the outlet opening 22 forms a sealing surface against which the diaphragm 26 can seal, such that the size of a passage through the outlet opening can be controlled by means of move-ments of the diaphragm 26. It is also possible to completely close the outlet opening 22 by means of the diaphragm 26. The milk exits through the outlet opening 22 in a substantially horizontal direction and then turns upwards in a substantially vertical direction through the outlet passage 16.
In this embodiment the measuring chamber 19 is positioned inside the fluid chamber 11 and is located beneath and partially behind the lower extending portion 18 of the outlet passage 16, as seen from the diaphragm point of view. The measuring cham-ber may be formed as a groove that is delimited by a protruding element 13, which is a part of the lower extending portion 18, 21 of the outlet passage; and substan-tially vertical side wall surfaces 17. The interior shape of the measuring chamber may be the same as described above for the first embodiment, i.e. being narrower at the upper back end than at the opening.
The device is preferably moulded from a plastics material one piece integrally com-prising the fluid chamber 11, the inlet passage 15, the measuring chamber 19 and the outlet passage 16. Two electrodes 12 are arranged in the measuring chamber 19, extending substantially horizontally through openings in the rear wall 14. The elec-trode connection is protected by protective walls 24 arranged around the openings 25.
In use the milk flows upwards through the device similarly as described for the first embodiment. After having changed direction in the area of the measuring chamber 19 the milk flow leaves the fluid chamber 11 through the outlet passage, via the out-let opening 22 of the fluid chamber.
A milking apparatus for milking of an animal compri sing a device as described above is shown in Fig. 7. The apparatus comprises a milking member 30 intended to be applied to the teats of an animal, a milk conduit 31 for transportation of milk from the milking member 30 to a milk line 32 that is located higher than the milking member. The device 1; 10 as described above is arranged in the milk conduit, such that the opening of the measuring chamber is directed towards the milking member 30.
Many changes and modifications in the above embodiments may, of course, be car-ried out without departing from the scope of the invention. Accordingly, that scope is intended to be limited only by the appended claims.
These and other hitherto known devices for measuring electrical conductivity in milk suffer from difficulties in drainage of the milk. In a sample chamber of the type shown in WO 95/22888 or W099/18774, the drainage opening must be small enough to retain a milk sample in the chamber. However, such a small opening eas-ily becomes clogged by fat agglomerations or dirt particles in the milk. In the type shown in EP 0397274 A1 a small amount of milk remains, also when the milk has ceased to flow through the device. The impeded milk drainage in the sample cham-ber is an obstacle in cleaning of the equipment and might also adversely affect the reliability of the measuring result.
Summary of the invention The present invention aims at providing an improved device for measuring of an electrical parameter for use in a milking apparatus, which does not suffer from the above disadvantages, but allows a reliable measurement and can easily be cleaned.
This is achieved according to the present invention by means of a device as set out in claim 1. This device is arranged in a substantially vertical milk flow conduit of a milking apparatus and comprises a measuring chamber having at least two elec-trodes. Milk is intended to flow in an upward direction in the milk flow conduit, and the measuring chamber is closed in an upward direction and has a downwardly di-rected opening for entry and exit of milk. The chamber will thus be filled when milk flows upwards through the device, and instantly empties through the opening, due to gravity, when the milk ceases to flow. When the measuring chamber is filled with milk, a signal can be obtained from the measuring chamber via the electrodes.
The signal can be used for evaluation of whether the animal suffers from a disease such as mastitis, by comparing the maximum value of the conductivity at different milk-ing occasions. The presence of a signal also reliably indicates the presence of a milk flow through the device. A signal will be given continuously during the passage of a milk slug through the device and will cease when the milk slug has passed since any small remaining amount of milk will directly drain from the measuring chamber.
The time period needed for the milk slug to pass through the device is thus easily detected, which together with the known volume of the milk conduit allows the milk flow volume to be calculated. Because the device is adapted to be arranged in a sub-stantially vertical milk conduit in which the milk flows upwardly, it is particularly useful in high-line milking applications, where the milk anyway must be must trans-ferred upwards to the milk line.
The measuring chamber is preferably arranged in the device such that when milk flows through the device the milk flow direction is changed. When the milk flow deviates from its original direction any air trapped in the measuring chamber will be dragged along with the milk flowing by and the chamber will accordingly be com-pletely filled with milk and no air is trapped in the chamber, and thus a reliable value of the electrical parameter is obtained. The device comprises a lower inlet passage, and an upper outlet passage for the milk flow. The measuring chamber is positioned such that its opening is positioned directly above the lower milk flow inlet passage, so that a milk flow entering the device is directed straight into the measuring chamber, which is delimited between an outer wall of the device and a protruding element that extends from the outer wall.
The device may further comprise a diaphragm valve, and the measuring chamber is then arranged prior to the diaphragm in the flow direction. The valve comprises a fluid chamber, which has a fluid inlet opening and a fluid outlet opening, which is directed towards the diaphragm, at the end of the milk flow outlet passage which ex-tends into the fluid chamber. The measuring chamber is positioned in the fluid chamber opposite to the diaphragm and underneath the outlet passage. This makes the device compact and effective, and several purposes can be fulfilled by means of a single piece of equipment, particularly when the end portion of the outlet passage, extending into the fluid chamber, is used as the protruding element confining the measuring chamber. The electrodes are preferably arranged in, and extend substan-tially horizontally through the outer wall, for easy mounting and access.
The invention also relates to a milking apparatus for milking of an animal, compris-ing a milking member 30 intended to be applied to the teats of said animal, a milk conduit 31 for transportation of milk from the milking member 30 to a milk line 32 that is located higher than the milking member, in which a device as described above is arranged in the milk conduit, such that the opening of the measuring cham-ber is directed towards the milking member 30.
Short description of the drawings In the following, embodiments of the present invention will be described, by way of example, with reference to the appended drawings, wherein Fig. 1 shows a cross-sectional view of a first preferred embodiment of the invention;
Fig. 2 shows a front view of a second preferred embodiment of the device, in which a diaphragm is not shown;
Fig. 3 shows a cross-sectional view taken on the line A-A in Fig. 2, in which the diaphragm is shown;
Fig. 4 shows a rear view of the device in Fig. 2;
Fig. 5 shows a perspective front view of the device in Fig. 2; and Fig. 6 shows a perspective rear view of the device in Fig. 2;
Fig. 7, shows schematically a milking apparatus comprising the device shown in Figures 1-6.
Detailed description of the invention The overall idea of the present invention is to provide in a milk conduit, a measuring chamber that is closed at the upper end and open at the lower end, whereby the inte-rior space of the chamber is easily accessed by upwardly flowing milk, and no risk of clogging exists and the chamber is very easy to clean.
The measuring chamber of the invention may be arranged in a milking apparatus, in practically any location between the teat cups of the milking member and the milk line, as long as it is arranged in a milk conduit in which the milk flows upwards in a substantially vertical direction. Throughout the following description the spatial ori-entation of the device is presupposed to be the same as when arranged in the sub-stantially vertical milk conduit. Accordingly a lower or bottom element of the device will be located closer to the milking member than an upper or top element.
In a first embodiment of the invention, shown in Fig. 1, the device 1 comprises a tu-bular portion inside which a measuring chamber 9 is arranged, which comprises two electrodes 2. The measuring chamber is delimited by a protruding element 3 extend-ing from the wal14 of the tubular portion. Milk enters the device from below through an inlet passage 5 and is directed straight into the measuring chamber 9.
The protruding element 3 is located in the flow direction of the milk and thus hin-ders the milk flow to continue in its original direction, and instead forces the milk flow to deviate and flow through the gap left in the tubular element beside the measuring chamber 9. The milk then leaves the device through an upper outlet pas-sage 6.
The measuring chamber 9 is closed in the upward direction by means of the protrud-ing element 3 and is open in the downward direction for entry and exit of milk. The protruding element 3 preferably includes a plurality of substantially vertical wall members 7 defining the side walls of the measuring chamber 9, and an upper wall member 8 defining the upper wall of the measuring chamber. In a particularly ad-vantageous alternative the upper wall member 8 is inclined such that is slopes, pref-erably along a parabolic curve, from the point on the wall from which it extends (at the back end of the measuring chamber) downwards to the opening of the measuring chamber. The measuring chamber 9 is thus upwardly tapered and is narrower at the upper back end, than at the opening, such that it is deeper in the area closest to the wall 4, and is rather shallow in the area near the lower portion of the upper wall member 8. This will enhance the efficiency of the milk flow into and out of the measuring chamber, as well as the removal of any trapped air inside the measuring chamber.
Figures 2-6 show a second embodiment of the invention, in which a vacuum regula-tion diaphragm valve (shut-off valve) is incorporated in the device 10. The valve in-cludes a fluid chamber 11 which encompasses a somewhat cup-shaped element 27 and a diaphragm 26. The diaphragm is shown only in Fig 3. The fluid chamber I
comprises a milk inlet opening 20 at its bottom, and a substantially tubular milk inlet passage 15 is attached to the inlet opening below the fluid chamber. A milk outlet passage 16 is arranged at the upper end of the fluid chamber. The outlet passage 16 is comprised of an upper substantially tubular portion mainly located outside the fluid chamber 11 and a lower extending portion 18, 21 located inside the fluid chamber. A milk outlet opening 22 from the fluid chamber I 1 is located at the end of the extending portion 18, 21, and the edge rim 23 surrounding the outlet opening 22 forms a sealing surface against which the diaphragm 26 can seal, such that the size of a passage through the outlet opening can be controlled by means of move-ments of the diaphragm 26. It is also possible to completely close the outlet opening 22 by means of the diaphragm 26. The milk exits through the outlet opening 22 in a substantially horizontal direction and then turns upwards in a substantially vertical direction through the outlet passage 16.
In this embodiment the measuring chamber 19 is positioned inside the fluid chamber 11 and is located beneath and partially behind the lower extending portion 18 of the outlet passage 16, as seen from the diaphragm point of view. The measuring cham-ber may be formed as a groove that is delimited by a protruding element 13, which is a part of the lower extending portion 18, 21 of the outlet passage; and substan-tially vertical side wall surfaces 17. The interior shape of the measuring chamber may be the same as described above for the first embodiment, i.e. being narrower at the upper back end than at the opening.
The device is preferably moulded from a plastics material one piece integrally com-prising the fluid chamber 11, the inlet passage 15, the measuring chamber 19 and the outlet passage 16. Two electrodes 12 are arranged in the measuring chamber 19, extending substantially horizontally through openings in the rear wall 14. The elec-trode connection is protected by protective walls 24 arranged around the openings 25.
In use the milk flows upwards through the device similarly as described for the first embodiment. After having changed direction in the area of the measuring chamber 19 the milk flow leaves the fluid chamber 11 through the outlet passage, via the out-let opening 22 of the fluid chamber.
A milking apparatus for milking of an animal compri sing a device as described above is shown in Fig. 7. The apparatus comprises a milking member 30 intended to be applied to the teats of an animal, a milk conduit 31 for transportation of milk from the milking member 30 to a milk line 32 that is located higher than the milking member. The device 1; 10 as described above is arranged in the milk conduit, such that the opening of the measuring chamber is directed towards the milking member 30.
Many changes and modifications in the above embodiments may, of course, be car-ried out without departing from the scope of the invention. Accordingly, that scope is intended to be limited only by the appended claims.
Claims (12)
1. A milking apparatus comprising a substantially vertical milk flow conduit arranged for milk to flow in an upward direction through the conduit, and a measuring device (1; 10) arranged in the conduit and including at least two electrodes (2; 12), characterised in that the electrodes are disposed in a measuring chamber (9;19) arranged in the conduit, the measuring chamber being closed in said upward direction and having a downwardly directed opening through, which milk flowing upwardly through the conduit can enter to fill the measuring chamber, and through which opening milk can drain from the measuring chamber back towards the conduit on the upstream side of the measuring chamber so that measuring chamber instantly empties when the milk ceases to flow.
2. A milking apparatus according to claim 1, wherein the measuring chamber (9; 19) is arranged such that the flow direction of milk flowing through the conduit is altered in the area of the measuring chamber, for the chamber to be filled with milk and have no air trapped therein when milk flows through the conduit.
3. A milking apparatus according to claim 1 or 2, wherein the measuring is included in a device/ comprising a lower milk flow inlet passage (5; 15) and an upper milk flow outlet passage (6; 16), and the measuring chamber (9; 19) is posi-tioned such that its opening is positioned directly above the lower milk flow inlet passage.
4. A milking apparatus according to any one of claims 1-3, wherein the measuring chamber is delimited by an outer wall (4; 14) and a protruding element (3; 13) extending from said outer wall.
5. A milking apparatus according to any of one of claims 1-4, further comprising a valve having a diphragm (26), wherein the measuring chamber (9;
19) is arranged prior to the diaphragm in the flow direction.
19) is arranged prior to the diaphragm in the flow direction.
6. A milking apparatus according to claim 3, further comprising a dia-phragm valve with a fluid chamber (11) having a fluid inlet opening (20), wherein the milk flow outlet passage (16) extends into the fluid chamber (11) and has a fluid outlet opening (22) at its end, which opening is directed towards the diaphragm (26), and wherein the measuring chamber (19) is positioned in the fluid chamber opposite to the diaphragm and underneath the milk flow outlet passage (16).
7. A milking apparatus according to claim 6, wherein a protruding ele-ment (13) confining the measuring chamber (19) is a part of the milk flow outlet passage (16) extending into the fluid chamber (11).
8. A milking apparatus according to any one of claims 1 to 7, wherein the electrodes (2;12) are arranged in, and extend substantially horizontally through an outer wall portion (4; 14) of the measuring chamber.
9 A milking apparatus according to any one of claims 1-8, wherein the electrical conductivity of the milk is measured by means of the electrodes,
10. A milking apparatus according to any one of claims 1-9, wherein the milk flow is measured by means of registration of the length of a time period within which a signal is given from the electrodes.
11. A milking apparatus according to any one of claims 1 to 10, wherein the milk flow conduit connects a milking member (30) intended to be applied to the teats of an animal, a milk line (32) that is located higher than the milking member, the opening of the measuring chamber being directed towards the milking member.
12. A measuring device (1;10) arranged to be disposed in a substantially vertical milk flow conduit of a milking apparatus, through which conduit milk flows in an upward direction, the measuring device including milk inlet and outlet passages (5, 6; 15; 16), and at least two electrodes (2; 12) disposed in a measuring chamber (9; 19) located between the inlet and outlet passages, characterised in that the inlet and outlet passages (5, 6; 15, 16) are below and above the measuring chamber, respectively, that the measuring chamber (9; 19) is closed in the upward direction towards the outlet passage (6; 16), and that the measuring chamber has a downwardly directed opening facing the inlet passage, through which opening milk flowing upwardly through the inlet passage (5; 15) can enter to fill the measuring chamber, and through which opening milk can drain from the measuring chamber back towards the inlet passage so that the chamber instantly empties when the milk flow through the device ceases.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0700728 | 2007-03-23 | ||
| SE0700728-9 | 2007-03-23 | ||
| PCT/SE2008/000174 WO2008118056A1 (en) | 2007-03-23 | 2008-03-04 | A device for measuring an electrical parameter in milk and a milking apparatus including such a device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2680781A1 true CA2680781A1 (en) | 2008-10-02 |
| CA2680781C CA2680781C (en) | 2015-10-20 |
Family
ID=39788724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2680781A Expired - Fee Related CA2680781C (en) | 2007-03-23 | 2008-03-04 | A device for measuring an electrical parameter in milk and a milking apparatus including such a device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5427612B2 (en) |
| CA (1) | CA2680781C (en) |
| WO (1) | WO2008118056A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES1075767Y (en) * | 2011-06-08 | 2012-02-29 | Univ Miguel Hernandez De Elche | ELECTRICAL CONDUCTIVITY MEASUREMENT DEVICE IN FLOWS OF SMALL FLOW |
| JP5728715B2 (en) * | 2011-08-11 | 2015-06-03 | オリオン機械株式会社 | Milk meter |
| JP6240905B2 (en) * | 2013-12-27 | 2017-12-06 | オリオン機械株式会社 | How to clean pipeline milkers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1451215A (en) * | 1972-11-09 | 1976-09-29 | Harman La | Milking machinery control apparatus |
| US3884187A (en) * | 1973-09-21 | 1975-05-20 | Chalton Electronic Services | Mastitis detector |
| JPS5935574B2 (en) * | 1980-12-24 | 1984-08-29 | エーザイ株式会社 | Milk crawler equipped with a quarter milk inspection device |
| DE3101302A1 (en) * | 1981-01-16 | 1982-08-05 | Bio-Melktechnik Swiss Hoefelmayr & Co, 9052 Niederteufen, Aargau | "MILK FLOW METER" |
| JPS6070021A (en) * | 1983-09-26 | 1985-04-20 | 東亜電波工業株式会社 | Milking device |
| NZ210240A (en) * | 1984-11-19 | 1989-04-26 | Allflex Int | Milk flow measure and teat cup removal |
| GB2182534B (en) * | 1985-11-12 | 1989-10-04 | Ambic Equip Ltd | Improvements in or relating to automatic milking apparatus and methods |
| NL8901165A (en) * | 1989-05-10 | 1990-12-03 | Nedap Nv | MASTITIS SENSOR. |
| DE4110146A1 (en) * | 1991-03-27 | 1992-10-01 | Hoefelmayr Bio Melktech | METHOD AND DEVICE FOR MEASURING A VALUE CORRESPONDING TO THE MASS OF A MILK PLUG AND THE CORRESPONDING MILK FLOW |
| JPH08136535A (en) * | 1994-11-11 | 1996-05-31 | Fuji Denki Techno Eng Kk | Mastitis detector for milk |
| SE508458C2 (en) * | 1996-04-24 | 1998-10-05 | Alfa Laval Agri Ab | Apparatus for measuring an electrical quantity of milk |
| NL1007140C2 (en) * | 1997-09-26 | 1999-03-29 | Idento Electronics Bv | Milking installation. |
| WO1999018774A1 (en) * | 1997-10-13 | 1999-04-22 | N.V. Nederlandsche Apparatenfabriek Nedap | Intelligent claw |
| CA2229354C (en) * | 1998-02-13 | 2005-02-08 | Agricultural Instruments Canada Ltd. | Somatic cell analyser |
| US6741942B2 (en) * | 2002-01-07 | 2004-05-25 | S.A.E. Afikim | Free-flow fluid measurement meter |
-
2008
- 2008-03-04 JP JP2009554479A patent/JP5427612B2/en not_active Expired - Fee Related
- 2008-03-04 WO PCT/SE2008/000174 patent/WO2008118056A1/en active Application Filing
- 2008-03-04 CA CA2680781A patent/CA2680781C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008118056A1 (en) | 2008-10-02 |
| CA2680781C (en) | 2015-10-20 |
| JP5427612B2 (en) | 2014-02-26 |
| JP2010522324A (en) | 2010-07-01 |
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