SU814340A1 - Device for diagnosis of cow mastitis - Google Patents

Description

I

The invention relates to veterinary medicine, namely to devices (devices) for diagnosing mastitis in cows during milking in a milking installation in the milking parlor of the dairy complex.

A portable device for determining mastitch in cows is known, which contains an electrical conductivity sensor included in one of the arms of the resistance bridge, c. one diagonal, which includes a source of alternating voltage, and the other includes a pointer device 11.

Portable instruments for the diagnosis of mastitis Lactoglandosonometer and OSM-70 are also known, containing a sensor for determining the electrical conductivity of a milk sample, a bridge circuit or a resonant circuit, and a dial gauge 2 1,

The disadvantages of these devices is the need for manual sampling of milk and the determination of mastitis, which leads to high labor costs and does not allow for automation. The process of mastitis determination during the milking machine.

Closest to the present invention is a device for determining

mastitis containing teat cups, a collector, a milk conduit, an electrical conductivity sensor connected directly to the milk conduit between the collector and the milk collector, a trigger circuit connected to the sensor and an indicator device 13.

A disadvantage of the known device is that the electrical conductivity sensor of the device is included in the milk line at the exit of the milking unit's collector, thereby determining the magnitude of the electrical conductivity of milk from all four udder parts of a cow. In this case, if one dam of the udder is affected by mastitis, which is most often observed in practice, then when mastitis milk is displaced from the affected lobe and milk from 3 healthy udder lobes, the conductivity of the packaged milk will change slightly. As a result, the definition of mastitis, especially subclinical,

will be difficult. It does not determine which specific udder percentage is affected by mastitis. Since the mastitis of all 4 lobes of the udder occurs simultaneously

Very rarely (1-3% of all cases of disease) and the increase in electrical conductivity of milk from 4 is mainly due to other factors (feed ration, lactation, physiological state), then the device that registers the increase in electric conductivity of milk from all four healthy the proportion of the udder of the cow, gives a false signal of mastitis. Therefore, the known devices have low accuracy.

The purpose of the invention is to improve the accuracy of diagnosis of mastitis.

The goal is achieved by the fact that in a known device for the diagnosis of mastitis, containing teat cups connected to a collector, a milk conduit, which includes electroconductivity sensors, a trigger connected to the sensor, and an indicator device, conductivity sensors are connected between each teat Cup and collector, and A prohibition element is connected to the electrical conductivity sensors via a trigger; the output of the milking unit number and the udder fraction number with indicator devices are connected to the output. you.

FIG. 1 shows a block diagram of a device for diagnosing mastitis in cows} in FIG. 2 - functional electrical circuit device.

In order to simplify the diagram shows the connection of the sensors of two milking machines. In practice, the circuit allows the connection of any number of milking machines with sensors installed on them.

A device for diagnosing mastitis in cows contains sensors 1 of electrical conductivity (for simplicity, only the placement of sensors from one milking machine is shown), which are included in the milk line 2 between each teat cup 3 and collector 4, from which milk from 4 parts of the udder flows into milk collector (not shown).

The conductivity sensors 1 of all milking machines are electrically connected to the measuring unit 5, the output of which is connected to the indicator devices 6 and 7, on which the number of the milking machine and the numbers affected by the udder are displayed.

The functional electrical circuit of the device contains conductivity sensors connected to the outputs of the resolution circuits 8, to one input of which one of the outputs of the distributor 9 pulses are connected (for example, 1st channel), and to the second input-generator 10 (alternating voltage source). The pulse distributor 9 and resolution circuits 8 are an electronic switch.

Depending on the number of milking machines connected to the device, the circuit of the electronic switch contains from 2 to n-channels of interrogation of sensors. The outputs of the sensors 1 of the conductivity of all milking machines are connected to the trigger device 11, which is connected to the prohibition circuit 12. The output of the circuit 12 of the ban is connected to one of the inputs of the shapers of the number of milking machines 13, the number of which is equal to the number of connected milking machines. To the second input of the drivers of the number of milking machines 13 are connected the outputs of certain channels of the distributor 9 pulses, corresponding to the numbers of the connected milking machines. The outputs of the shaper units of the milking machines 13 of each measurement channel are connected to the indicator devices 14, on which the number of the corresponding milking machine is displayed.

Each of the 4 outputs of the trigger device 11 is connected with the corresponding input of the formers 15 of the udder share affected by mastitis.

The second inputs of the formers 15 are connected to the output of the formers 13. An indicator device 16 is connected to each of the formers 15. An audible alarm 17 of the mastitis is connected to the output of the prohibition circuit 12 ..

Device for the diagnosis of mastitis works as follows.

In the process of milking cows in a milking machine, an alternate survey of the state of the electrical conductivity sensors Ij installed on each milking machine is carried out.

Sensors 1 are polled using resolution circuits 8, which, when a particular channel receives polling pulses from a distributor 9 on one of their inputs, supply voltage from generator 10 to sensors 1.

If one or two or three lobes of the udder are affected with mastitis, the increase in the electrical conductivity of milk is recorded by sensors 1 and signals about an increase in the electrical conductivity of milk above a certain threshold corresponding to normal milk are sent to the trigger device 11, changing its state. The signals on the change in the state of the trigger device 11 are sent to the prohibition circuit 12, which generates signals on the presence of mastitis.

60 These signals are sent to one of the inputs of the shapers of the milking machine number 15. To the second input of the drivers 13, the polling signals of the distributor are alternately received.

65 9 pulses.

The allocation of the signal corresponding to a certain number of the milking machine, which is used for milking a cow affected by mastitis, occurs when two signals are present at the inputs of the drivers 13: a circuit, 12 prohibitions and a certain channel of the distributor 9 pulses. The output signal of the drivers 13 includes an indicator device 14 on which the number of the milking machine is displayed.

In addition, information of the udder portions supported by mastitis from the outputs of the triggering device 11 is fed to one of the inputs of the formers 15 of the number of affected portions. The second inputs of the formers 15 receive a signal from the output of the formers 13. When both signals for the formers 15 are simultaneously present from the corresponding outputs of the trigger device 11 and the formers 13, the numbers of affected shares are displayed on the indicator devices 16.

With an increase in the electrical conductivity of milk at the same time on all 4 udder lobes, due to the measurement of the feed ration, physiological state, lactation period and for other reasons, all inputs of the prohibition scheme 12 receive signals about exceeding the threshold values of the electrical conductivity of milk. In this case, the output of the scheme 12 prohibition of mastitis will be absent. Thus, the output of the device for the diagnosis of mastitis does not pass a false signal about the disease of the cow mastitis.

The proposed device for the diagnosis of mastitis makes it possible to automate the diagnosis of mastitis and detect mastitis in all simultaneously treated cows in the milking machine.

The proposed device for the diagnosis of mastitis makes it possible to increase the productivity of labor compared to electronic devices of the portable type, almost 100 times.

The estimated economic effect from the introduction of a device for diagnosing mastitis in cows in only one dairy complex per 1000 cows will be 10,000 rubles. per year, and in the whole country about 50 ml, rub. annually.

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Claims (3)

1.Kartashov L.P. Control during machine milking. M., Rosselkhozizdat, 1977, p. 34-36. 2. Veterinarian, -formacoprofilac40 tick, pharmacotherapy and biopharmacy Riga. Zvoigzne, 1974, p. 34-40. 3. US patent 3884187, cl. 11914. 14, 1978. J 3 3 h AND db