SU1739256A1 - Device for evaluation of sphincter tonus and udder tissue elasticity - Google Patents

Abstract

Use: obtain information about the size of the sphincter tone and elasticity of the animal's udder tissue. SUMMARY OF THE INVENTION: The device comprises an indenter 1, a force driver 2, a force converter 3 and displacement 5, a reversible 4 and a totalizer 6 pulse counters, a master oscillator 7, comparators 8 and 9 numerical equivalents, an indicator 10 of reading the measured parameter and a control unit 11. The inputs of the comparators 8 and 9 are connected to the outputs of the transducers 3 and 5 of force and displacement of the indenter 1 via reversing 4 and summing 6 pulse counters, the first inputs of which are connected to the corresponding outputs of the master oscillator 7, and the outputs of the comparators 8 and 9 are connected to control unit 11 information digital display 10. The outputs of the control unit 11 are connected to the locking inputs of counters 4 and 6, to the first and second inputs of the force generator 2, the third and fourth inputs of the reversible and summing counter . 1 il. ef yo

Description

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The invention relates to agriculture and is intended, in particular, for the investigation and analysis of the properties of udder tissue of farm animals.

A device for recording the tonus and motor activity of the mammary gland nipple sphincter is known, consisting of a tensometric sensor and a recording device, the connection between which is carried out via a sphincter tone channel on the basis of a DC amplifier and high-pass filter. and through the rhythmic process measurement channel based on the dc amplifier and low pass filter. The sensor includes a housing, a spring, a strain gauge, pins, a latex coating film. The installation allows the motor function of the nipple sphincter to be studied at various stages of the milk reflux reflex in cows, goats and other animals during mechanical milking. However, to measure the sphincter tone and frequency of rhythmic processes, the sensor must be inserted into the nipple canal, which causes concern to the animal and reflects on the accuracy of determining these indicators.

The purpose of the invention is to improve the accuracy of measuring the sphincter tone and elasticity of the tissues of the udder of the animal.

The goal is achieved by the fact that in the device, which includes an indenter connected to the displacement transducer, mounted on a force driver, which is associated with a transducer and indicator, the peculiarity is that it is equipped with a master oscillator, reversible and summing counters, two comparators and the control unit, while the master oscillator is connected to the first inputs of the reversible and summing counters, the second inputs of which are connected respectively to the outputs of the force transducers and indentation, and the output of the reversible counter through the first comparator is connected to the first input of the control unit, the second input of which through the second comparator is connected to the output of the summing counter and the first input of the indicator, the first and second inputs of the forcing force of the indenter, the third and the fourth inputs of the reversing and summing counters are connected to the corresponding outputs of the control unit, and the blocking inputs of the indicator, reversing and summing counters are connected to each other and to the corresponding you control unit stroke.

The drawing shows a block diagram of the device.

The device contains an indenter 1 (a rod with a spherical tip), which, under the action of the force former 2, is pressed into the test portion of the tissues of the nipple and the udder of the animal for a calibrated depth with a fixed force. The magnitude of the force is proportional to the compression of the spring of the force driver 2, the force converter 3 is converted into an electrical signal, which is transmitted to the input of the reversible counter 4, which has blocking inputs on the summing and subtracting inputs, as well as the installation input zero. A displacement transducer 5 converts the current displacement values of the indenter 1 into an electrical signal and transmits to a summing counter 6 having counting inputs and interlocking and zero setting outputs. The master oscillator 7 with a controlled frequency divider has two outputs that are connected to the inputs of counters 4 and 6. The output signals of the master oscillator 7 differ in frequency by the value of the numerical equivalent of the constant N (C). At its control input, the constant is equal to the product of the calibrated displacement h of the indenter 1 by the radius of its rounding (C 2hR). The comparator 8 is designed to compare the output signals of the reversible counter 4 and the numerical equivalent of N (the initial force applied to the indenter .1, Comparator 9 is used to compare the output signals of the summing counter 6 and the numerical equivalent N (rt) of the calibrated displacement hj of the indenter 1. Information input the indicator 10 is connected to the output of the totalizer 6. The outputs of the comparators 8 and 9 are connected to the inputs of the control unit 11. The inputs of the control unit 11 are connected to the inputs of the force generator 2, the third and the fourth th inputs of the reversible counter 4, the second input of the indicator 10, the blocking inputs of the subtracting and counting inputs of the reversing and summing counters 4 and 6 and the third and fourth inputs of the summing counter 6.

The device works as follows.

Before you start, press the Start button. In accordance with this command, the control unit 11, through the corresponding outputs, sets the initial (Ex) position of the formation of 2 forces and resets to zero the counters 4 and 6.

Further operation of the device consists of two cycles. After executing the command Ex. At the output of control unit 11, a Start signal appears, which, respectively, includes a driver 2

effort. Shaper 2 effort affects the indenter 1 and sets it in motion. The force P and the movement of the indenter h under the influence of this force by converters 3 and 5 are converted into electrical signals that arrive at the counting inputs of counters 4 and 6, which form the numerical equivalents M (P) and N (h) proportional, respectively, to force P and displacement indenter h. During the movement, the indenter 1 contacts the surface of the nipple or udder tissue, the tone of which is to be measured, and a T elasticity reaction occurs that prevents the indenter from moving 1. The moment of contact between the tip of the indenter 1 s the measured surface of the nipples or the udder mirror is determined in the device by the change in the numerical equivalent of M (P) generated by the reversible counter 4 using a comparator 8.

Comparator 8 compares the current value of N (P) with the initial N (P0) corresponding to the force P at the moment when the tip of the indenter 1 contacts the surface of the tissue being measured. If M (P) and N (P0) are equal, a signal is output to the corresponding input of the control unit 11. In accordance with this signal, the control unit 11 resets the counter 6 to the zero position and removes the blocking from its input in order to pass the signal from the output of the converter 5.

From this moment on, counter 6 is formed with a numerical equivalent N (h) proportional to the displacement of the indenter 1. The current value of N (h) is compared in the comparator 9 with the set (reference value M (r) h) and at the moment of their equality at its output, a signal on which the control unit 11 issues a ban on the inputs of the locks to the counter 4 and 6 for passing signals from the outputs of the converters 3 and 5 and removes the control signal from the Start input of the force driver 2. In this case, in the counters 4 and b, the numerical equivalents N (P) are fixed, respectively, minus N (P0), corresponding to the displacement of indenter 1 by the value of pe, in the direction of the recess according to the elasticity of the measured tissue, and the value of N (h) N (h3). On this the first cycle of the device is over.

In the second cycle, with the corresponding signals of the control unit 11, the information of counter 6 is reset to zero and both counters 4 and 6 are transferred to the new mode of operation.

The blocking is removed from the subtracting input of counter 4 and from the first counting input of counter 6 to pass the signals of the master oscillator 7. Thereafter, in the counter

4, the contents will be reset with the frequency FI N (C) - Re, and in the counter 6 the formation of the numerical equivalent N (T) is the value of the tone T of the measured tissue. The operation time of the device in this cycle is determined by the expression

N (P) N (P) 1 p

1 prt c5 pGE 9

and the value of M (T), formed by the counter 6, the expression

N (PU-F9 mtch

N (T)

The time t is determined by the comparator 8, when the counter 4 has the current value N (P) and the set M (P0), according to the signal of which the control unit 11 closes the inputs of counters 4 and 6 for passing signals from the master oscillator 7 and opens the indicator information input 10 visual control, the information inputs of the indicator 10 are connected with the output of the counter 6 and the value of the measured tone T will be displayed in kilopascals (kPa).

The measurement range of the sphincter tone of the mammary gland of cows is 4-70 kPa, and the elasticity of the tissues is 1-3 kPa.

Claims (1)

0 claims A device for measuring the sphincter tone and elasticity of the animal's udder tissue, containing an indenter connected to the displacement transducer. mounted on a force driver, which is associated with a force converter, and an indicator, characterized in that, in order to improve the measurement accuracy, it is equipped with a master oscillator, reversible 0 and summing counters, two comparators and a control unit, while the master oscillator is connected to the first inputs of the reversing and summing counters, the second inputs of which are connected 5, respectively, with the outputs of the force and displacement transducers, the indenter, and the output of the reversible counter through the first comparator is connected to the first input of the control unit, the second input of which is connected through the second comparator to the output of the summing counter and the first input of the indicator , third and fourth reversing inputs 5 and the summing meters are connected to the corresponding outputs of the control unit, and the inputs for blocking the indicator, the reversing and summing meters are connected to each other and to the corresponding output of the control unit.