SU996938A1 - Device for measuring textile material extension or shrinking - Google Patents

Description

one

The invention relates to the textile industry, more specifically to devices for measuring the stretch or shrinkage of textile materials.

A device for measuring the drawing or shrinking of textile materials is known, which contains two tachogenerators, each of which is kinematically connected with a corresponding toner shaft, and a measuring unit whose input is connected with a common point of series-connected tachogenerators 1.

A disadvantage of the known device is the low measurement accuracy, due to the fact that it does not take into account the variability of the radius of zero shafts caused, for example, by eccentricity.

The purpose of the invention is to improve the measurement accuracy.

The goal is achieved due to the fact that a device containing two tachogenerators, each of which is kinematically connected with a corresponding shaft, and a measuring unit, the input of which is associated with a common point.

tachogenerators, has two multiplication units, and each zero shaft has a radius sensor i, the axis of the sensitive element of which is located perpendicular to the direction of material movement, and the output of the tacho generator and sensor of the radius of each shaft is connected to the second and the third inputs of the measurement unit.

The drawing shows a block diagram of the device.

A device for measuring drawdown or shrinkage contains sensors of 1 and 2 radii with sensitive elements 3 and 4 ,. tachogenerators 5 and 6, having a mechanical

Claims (2)

15 is connected with pulling shafts 7 and 8, multiplication blocks 9 and 10, measuring unit 11, built on the basis of a self-recording electronic automatic potentiometer with an amplifier 12, a reversible motor 13 and a reohord 14. Tachogenerators 5 and 6 are connected in series. The output of the tachogenerator 5 is connected to the first input of the multiplication unit 9. The second input unit 9, 399 is connected to the output of the sensor 1 of the radius. Similarly, the output of the tachogenerator 6 is connected to the first input of the multiplication unit 10, and the second input of the unit 10 is connected to the output of the sensor 2. The outputs of blocks 9 and 10 of the battery compartments are connected to the measuring unit 11. The device operates as follows. The voltage from the tachogenerator 5 is proportional to the angular velocity. U) is the load shaft 7 multiplied in block 9 by the voltage from the output of sensor 1- proportional to the radius RI of shaft 7. The output voltage of block 9 corresponds, therefore, to the linear velocity of the material in the place where the sensor element 3 is installed I. Similarly, the voltage at the output of the block 10 corresponds to the linear speed of the alternation of the material at the location of the sensing element 4 of the sensor 2 of the radius of the low shaft 8. The output voltages of the multiplication blocks 9 and 10 are fed into the block II. The error signal from the output unit 11 is amplified by amplifier 12 to a value sufficient to drive the engine 13. The rotation of the shaft of the engine 13 is converted into a straight-line movement of the slider and the pointer of the rail 14. The movement of the slider and pointer of the rail leads until the ratio of the resistances in the arms of the measuring unit becomes equal the ratio of the voltages from the outputs of the blocks is too much. Each value of the relationship of stresses, i.e., each value of the extraction or shrinkage of the material, corresponds to a certain position of the slider and pointer of the reichord. . The technical and economic effect of using the proposed device is determined by its high accuracy. . Apparatus of the Invention A device for measuring the stretch or shrinkage of textile materials, comprising two tachogenerators, each of which is kinematically associated with a corresponding thin shaft, and a measuring unit, the input of which is associated with a common point of sequentially connected tachogenerators, characterized in that measurement accuracy, it has two multiplication units, and each tube shaft has a radius sensor, the axis of the sensitive element of which is located perpendicular to the direction of movement of the material, Thereby, the outputs of the tachogenerator and the sensor of the radius of each m of the zero shaft are connected to the BTOpbiM and to the third inputs of the measuring unit through the appropriate multiplication unit, respectively. Sources of information taken into account during the examination 1. USSR author's certificate N 101778, cl. G 01 N 33/36, 1962.