SU1013842A1 - Cotton fibre ripeness determination method - Google Patents

Abstract

A METHOD FOR DETERMINING 3 COTTON FIBER GROWNS, which consists in subjecting a sample of cotton fibers to a compressive load, sounding it, measuring the amplitude of the oscillations and taking it into account when calculating the maturity of cotton fibers, distinguished by the fact that, in order to improve the accuracy , preliminarily remove the dependence of the elastic component of the cotton fibers ала realaxation on the magnitude of the compressive load, load the sample perpendicular to the direction of sound, the load value is chosen corresponding to The elastic value of the re-axation is removed, the load is removed, the sample is additionally sounded and the average maturity is calculated by the Formula: 11 i and & where Up and Ui are the amplitudes of the received stake (LB, respectively, with and without load action. 00 00 4ik BO

Description

The invention relates to non-destructive testing and can be used to determine the maturity of cotton fibers serving as raw materials for making cotton yarn.

A known method for determining the maturity of cotton fibers is that the loosened mass of fibers is placed in a closed cylindrical volume, from one end of the cylinder-. compressed air is supplied, the pressure of the air flow passing through the fiber is measured at the other end. The maturity of the fibers is judged by the pressure drop of the air jet at the inlet and outlet of the cylindrical chamber. The low level of control given by this technical solution is low bulk density of pulp from active. exposure to passing air.

The closest in technical terms to the invention is a method for determining the maturity of cotton fibers, which consists in subjecting a sample of cotton fibers to a compressive load, sounding it, measuring the amplitude of the last oscillations, and taking into account its calculation of the maturity of cotton fibers. A load is applied along the direction of the sound, and the maturity of the fibers is determined from the ratio of the radiated and received acoustic signals (2.

The disadvantage of this method is that, different average

fiber length and linear density,;

caused by the difference in climatic and biological-soil conditions, causes low control accuracy.

The aim of the invention is to improve the accuracy.

This goal is achieved by the fact that according to the method of determining the maturity of cotton fibers, which consist in subjecting a sample of cotton fibers to a compressive load, sound it, measure the amplitude of the oscillations and take it into account when calculating the maturity of cotton fibers, preliminarily remove the dependence the elastic component of the realaxation of cotton fibers from the magnitude of the compressive load, load the sample perpendicular to

the direction of the sound, the load value is chosen corresponding to the maximum value of the elastic component of the re-axation, the load is removed, the sample is additionally sounded, and the average maturity is calculated by the formula.

where Un and and are the amplitudes of the received oscillations, respectively, under the action of the load and without it.

FIG. 1 shows a diagram of a device that implements the proposed method of FIG. 2 shows the dependence of the elastic component of cotton fiber re-axking in percent of volume on the magnitude of the compressive force.

A device for determining the maturity of cotton fibers contains a master oscillator 1, the output of which is connected to the radiator input 2 acoustic oscillations, chamber 3 for accommodating a cotton sample, / receiver C acoustic oscillations, a compressing mechanism made in the form of a platform 5 of spring 6 with a latch 7 and a recorder . eight.

The method is as follows.

The cotton sample of a given CAN is based on the dimensions of the acoustic sensors of the camera, on the order of 20 g) is uniformly laid into the chamber 3, on the walls of which is perpendicular to the direction of the compressive force, the transmitter 2 and the receiver t of acoustic oscillations are fixed coaxially and opposite to each other. With the help of the pad 5 of the spring 6 with the latch 7, the fiber is squeezed. After this, the oscillator 2 from the generator 1 serves electrical oscillations that are converted into mechanical (acoustic). Acoustic oscillations, having passed through the pulp, hit the receiver k, are transformed into electrical oscillations, amplified and displayed on the recorder 8. Then, using a latch 7, they release the compressive spring 6, allowing the fibrous sample to be straightened, and compress the readings on the recorder 8 again and average maturity calculated by the formula named U2-Ul

Z gi

3-10138 24

The choice of the magnitude of the load, its dramatically increase the languor, the control, and the additional sounding of maturity.

curl.

FIG. 2

Claims (1)

METHOD FOR DETERMINING MATURITY OF COTTON FIBERS, which consists in subjecting a sample of cotton fibers to a compressive load, sounding it, measuring the amplitude of past vibrations and taking it into account when calculating the maturity of cotton fibers, characterized in that, in order to increase the accuracy, preliminarily remove the dependence the elastic component ^{1 of the} cotton fiber implementation from the magnitude of the compressive load, load the sample perpendicular to the direction of sounding, the magnitude of the load is selected corresponding to the maximum the value of the elastic component of the relaxation, remove the load, additionally sound the sample, and the average where U ₂ and maturity are calculated according to the Formula: - the amplitude of the received oscillations, respectively, under the action of the load and without it. SU, 1013842 'Figure 1 1013.842