JPH03280819A - Method for completion treatment of milking - Google Patents

Abstract

PURPOSE:To carry out proper completion treatment of milking according to bovine body characteristics by releasing teat cup liners when the rate of decrease exceeds the reference rate in decreasing the flow rate of milk in milking and raising an alarm when the rate of decrease is below the reference rate. CONSTITUTION:A milk pipe 51 is connected through a controller 20 to a milk craw 54 and then through teat cup liners (Ca), (Cb), (Cc) and (Cd) to a vacuum pipe 52. The flow rate value of milk in milking is obtained with a flow rate detecting circuit. The teat cup liners are released with a cylinder 56 when the rate of decrease in decreasing the flow rate exceeds the reference rate. When the rate of decrease is below the reference rate, an alarm is raised.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for finishing milking when milking is performed using a milking machine.

[Conventional technology]

When milking using a milking machine, it is necessary to determine the end of milking at an appropriate time. Over-milking leaves the internal tissue of the cow's udder in a vacuum, increasing the risk of mastitis and increasing the number of somatic cells in the milk. Therefore, accurately and reliably executing the milking end determination is an extremely important issue in milking.

On the other hand, recently, in order to automatically remove the teat cup liner in a milking machine from a dairy cow, a flow sensor has been used to determine the end of milking (see Japanese Patent Laid-Open No. 125827/1982).

Judgment using a flow rate sensor is made by measuring the flow rate of milk with a flow rate sensor, and determining whether the actual flow rate value at the end of milking is equal to a preset reference flow rate value (for example, 0.2 to 0.8 (kg/m i
If the milking temperature has decreased below (n), it is determined that milking has finished. In addition, as a further improvement, a milking end detection device is known that integrates the time during which the measured flow rate value has fallen below the reference flow rate value, and ends milking when this integrated value exceeds a certain value. (Refer to Japanese Utility Model Application Publication No. 63-68758) [Problem to be Solved by the Invention] By the way, in order to finish milking, the lactation hormone oxytocin acts due to physiological reasons.
This must be done within 5 minutes.

However, the conventional determination method ends when the flow rate decreases to a certain level (or at the cumulative point) regardless of the lactation time, so in the case of dairy cows with slow lactation rates, the teat cup liner may not be used even if the flow rate has exceeded 1°. may not leave. In this state, milking of the first or second of the four breasts is often completed, and the breast that is finished first is exposed to over-milking. In the end, this not only damages the breast tissue and increases the risk of mastitis, but also makes it impossible to achieve the original labor-saving benefits of automation, and is also extremely disadvantageous in terms of work efficiency.

In order to deal with such situations, an automatic/manual switching function is usually provided, but this switching needs to be done in accordance with individual biological characteristics (how milk comes out, presence or absence of leftover milk, etc.). However, when there are a large number of cows, there is a limit and it is easy to make mistakes in judgment.

The object of the present invention is to provide a milking completion processing method that solves the problems existing in the conventional techniques.

[Means to solve the problem]

The milking completion processing method according to the present invention measures the flow rate of milk during milking, when automatically removing the teat cup liners Ca, Cb, CC, etc. from the dairy cow at the end of milking, and when the flow rate decreases, The rate of decrease E of the flow rate at the detection point set by the value or relative value is determined. Only when the reduction rate E exceeds a preset standard rate S, the teat cup liner Ca... is automatically removed, and when it is below the standard rate S, an alarm is generated. Note that the magnitude of the standard rate S can be changed.

[For production]

According to the milking completion processing method according to the present invention, first, the reduction rate E of the flow rate that decreases near the end of milking is determined from the flow rate measured during milking. Based on the magnitude of this reduction rate E, it is determined whether the cow has a slow lactation rate by comparing it with the standard rate S.

・If the reduction rate E exceeds the standard rate S, the flow rate is rapidly decreasing, so the teat cup liner Ca is automatically
... to leave. On the other hand, if the reduction rate E is less than or equal to the reference rate S, the flow rate is in a gradual decrease state, so in this case an alarm is generated so that appropriate measures can be taken.

〔Example〕

Next, preferred embodiments of the present invention will be described in detail based on the drawings.

First, the overall configuration of a milking machine that can carry out the milking termination processing method according to the present invention will be described with reference to FIGS. 3 and 4.

FIG. 4 shows the external configuration of the milking machine A. In the same figure, 5
1 is a milk pipe, 52 is a vacuum pipe, and the milk vibe 51 is connected to the milk claw 54 via the control device 20. Four teat cup liners Ca, Cb, Cc, and Cd to be attached to the udder of a dairy cow are connected to the milk claw 54, and each teat cup liner Ca... is connected to the vacuum pipe 52. Further, 56 is a vacuum cylinder for automatic detachment, and a piston 56p is connected to the milk claw 54 via a connecting member 56s. Note that the vacuum cylinder 56 is connected to the vacuum pipe 52 via the control device 20.
Connect to. Therefore, when the teat cup liners Ca...- attached to the dairy cow are automatically detached, the vacuum state for the teat cup liners Ca-...- is released and the connecting member 56s is further driven by driving the vacuum cylinder 56.
The milk claw 54 is pulled up through.

On the other hand, the control device 20 is configured as shown in FIG.

21 is a control circuit. The control circuit 21 includes an operation circuit 22.
Start switch 23, stop switch 24 via
, the mode changeover switch 25, and the power switch 26.

Further, 27 is a flow rate detection circuit, and a pair of electrodes 28a and 28b are connected to the circuit 27. Each electrode 28a, 28
b is attached to the milking line and measures the electrical resistance value of milk by passing a current between the picture electrodes 28a and 28b (
For example, see Japanese Patent Application Laid-open No. 169428/1983). Note that this electrical resistance value changes in inverse proportion to the flow rate of milk.
The measured flow rate value M is obtained from the flow rate detection circuit 27.

Furthermore, H is a milking end detection system, which functions as follows. First, the measured flow rate value M obtained from the flow rate detection circuit 27 is supplied to the flow rate value comparison circuit 29 .

The flow rate value comparison circuit 29 has a preset reference flow rate value P(
2) is given from the control circuit 21, and the measured flow rate value M and the reference flow rate value P are compared. As a result, the actual measured flow rate M
becomes smaller than the reference flow rate value P, the end timer 30 is activated, this time is integrated, and the end timer 30 is activated.
If 0 times up, it is determined that milking has ended. Then, the milking termination process is performed according to the milking termination process method according to the present invention. Note that a reference flow rate value is set as a detection point to prevent a temporary decrease in milk yield due to external stimulation such as noise from being mistakenly determined to be the end of milking. Further, the cumulative time, milking time, etc. are displayed on the display section 34 via the display circuit 33.

Next, a milking termination processing method according to the present invention will be explained with reference to FIGS. 1 and 2.

First, the measured flow rate value M obtained from the electrodes 28&, 28b and the flow rate detection circuit 27 during milking is provided to the control circuit 21.

The control circuit 21 inputs the actual measured flow rate value M during the whole milking period.
Flow rate value data is obtained by sampling at a constant sampling time Tr. Then, the detection value D ms having a correlation with the total milk amount in a certain sampling period Ts (Ts>Tr), that is, the sum or average value of n pieces of flow rate value data based on the sampling time Tr included in the same period Ts. Find the detection value DN using etc. With such a detection method, it is possible to absorb variations in actually measured flow rate values within a short period of time. The fixed sampling period Ts is set sequentially at fixed time intervals during all or a part of the milking period, and the detected values are continuously obtained and stored in the memory.

Next, this processing method will be explained along the flowchart of FIG.

First, at the start of milking, an actual flow rate value is measured (step 1). Then, when the measured flow rate value reaches the set value (Fig. 2 P), sampling is performed at the sampling time Tr to continuously detect the detected value, etc. (step 2.3). On the other hand, the flow rate decreases near the end of milking. At this time, if the detected value reaches Da, the timer is activated at this point to measure time (step 4.5). Then, when the detected value reaches Db, the timer is stopped and the elapsed time Tc at this time is detected (step 6.7.8).

Next, from the obtained flow rates Da, Db and time Tc, the reduction rate E = dD / dt = (Da - Db
) / T c (step 9), and this reduction rate E
and a preset standard rate S (step 10).

At this time, when the reduction rate E exceeds the standard rate S, that is, when E>S, the flow rate decreases rapidly as shown in the milking characteristic Px shown in Fig. 2, so the teat cup liner C
a... is automatically removed (step 11). on the other hand,
When the reduction rate E is less than the standard rate S, that is, E≦S, the flow rate decreases gradually as shown in the milking characteristic py shown in Fig. 2, so it is difficult for the operator to check and manually operate. desirable. For this reason, the teat cup liner Ca... is placed in the installed state, and an alarm is generated from the speaker 32 or the like via the audio output circuit 31 (step 12).

Alarms include buzzers, lamps, and combinations of these.
Any means can be used. In this case, the operator checks the milking state, takes appropriate measures, finishes the milking, and manually removes the teat cup liner Ca (step 13).

Note that the standard rate S can be arbitrarily changed as necessary. In addition, the inspection point (D a,
D b ) can also be changed arbitrarily; in this case, Da, Db
may be set as an absolute value, or a peak value of the detected value may be stored and a ratio to this peak value may be set as a relative value. In addition, the detailed structure, method, etc. may be arbitrarily changed without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, in the milking completion processing method according to the present invention, when automatically removing the teat cup liner from the dairy cow at the end of milking, the milk flow rate during milking is measured, and when the flow rate decreases, an absolute value or a relative value is determined in advance. The rate of decrease in flow rate at the set detection point is calculated based on the value, and when the rate of decrease exceeds a preset standard rate, the teat cup liner is automatically removed, and an alarm is generated when the rate is below the standard rate. , has the following remarkable effects.

■ Since it is possible to automatically distinguish between automatic withdrawal and manual removal, it is possible to eliminate human errors in the determination and to perform milking efficiently.

■ When a dairy cow or the like has a slow lactation rate, an alarm can be generated to notify the operator, so that appropriate measures can be taken and harmful effects such as injury to living organisms can be prevented.

[Brief explanation of drawings]

Fig. 1.2 A flowchart showing the procedure of the milking completion processing method according to the present invention. Fig. 2: Characteristic diagram showing milking time versus flow rate. Fig. 3: Block diagram of a milking machine that can carry out the milking completion processing method. Figure 4: External perspective view of the milking machine. In the drawing, Ca, CblCclCd: Teat cup liner Fig. 3 Milking time Fig. 3 Fig.

Claims (1)

[Scope of Claims] [1] When the teat cup liner is automatically removed from the dairy cow at the end of milking, the flow rate of milk during milking is measured, and when the flow rate decreases, detection is set in advance using an absolute value or relative value. A milking completion processing method characterized in that the reduction rate of the flow rate at a point is determined, and the milking is automatically removed only when the reduction rate exceeds a preset reference rate. [2] The milking completion processing method according to claim 1, wherein the magnitude of the reference rate is changeable. [3] When the teat cup liner is automatically removed from the dairy cow at the end of milking, the flow rate of milk during milking is measured, and when the flow rate decreases, the rate of decrease in the flow rate is determined at a detection point set in advance using an absolute value or relative value. A milking completion processing method characterized in that when the reduction rate exceeds a preset standard rate, the teat cut liner is automatically removed, and when it is below the standard rate, an alarm is generated. [4] The milking completion processing method according to claim 3, wherein the magnitude of the reference rate is changeable.