DEVELOPMENT OF A METHOD FOR MEASURING DIELECTRIC CIRCUITS PULING SPEED
On the basis of the unipolar corona discharge, a method has been developed for contactless and continuous measurement of the pulling speed of thin and ultrathin dielectric filaments and optical fibers (10-125 microns) in the process of their manufacture. The measurement method differs from the known high accuracy and reliability of measurement and has noise immunity to changes in the electrical characteristics of the discharge gap and the state of the ambient atmospheric air. The main purpose of developing a device for measuring the speed of drawing dielectric threads is to ensure high accuracy and reliability of measurement when the indications of results are independent of changes in the electrical characteristics of the discharge gaps, the state of atmospheric air and the values of the geometric parameters of the dielectric filaments. The measurement of the speed of drawing dielectric threads is based on the principles of measuring velocities by the method of marks, which are preliminarily applied to moving objects, and then the speeds of their passage through various measuring instruments are determined [5]. However, there are significant technical difficulties with marking when measuring the speed of movement of micro-objects, such as a dielectric thread or a micro wire with enamel coating (10 - 100 microns). The proposed device for applying labels to a dielectric thread uses an outer corona discharge region that occurs when a sufficiently high voltage is applied between the corona wire and the outer plane-parallel electrode. In the outer corona discharge region, unipolar ions are usually present, which charge the surface of the dielectric filament. One of the best ways to get a clear picture of electronic labels on the surface of a dielectric filament is to supply the discharge chamber with additional clock pulses of sufficient magnitude with a certain duration and frequency. In this case, the dielectric filament is located parallel to the corona wire and in the middle of the discharge gap between the wire and the flat electrode. Next, a dielectric filament with electronic marks passes through a second measuring electrode, located some distance from the first electrode. When the filament passes through the measuring electrode, there are processes of discharge of the filament and accordingly, electric signals with a clock frequency appear on the electrode load. Now, choosing the duration of the reference signals, in other words, choosing the counting time of the clock pulses during this time, the number of pulses determines the speed of thread pulling.