SU909707A1

SU909707A1 - Method of measuring tape medium motion speed non-uniformity

Info

Publication number: SU909707A1
Application number: SU802876549A
Authority: SU
Inventors: Вадим Евгеньевич Лялин; Евгений Андреевич Лялин; Казимерас Миколо Рагульскис; Анатолий Иванович Нистюк
Original assignee: Предприятие П/Я В-2769
Priority date: 1980-02-01
Filing date: 1980-02-01
Publication date: 1982-02-28

Description

II

Изобретение относитс к измерительной техни ке, а именно к способам измерени параметров движени носителей информации.The invention relates to a measurement technique, in particular, to methods for measuring motion parameters of information carriers.

Известен способ измерени неравномерности скорости движени ленточного носител путем записи на носитель импульсного контрольного сигнала, воспроизведени сигнала и получени разностного сигнала, пропорционального изменению скорости носител 1.There is a known method for measuring the uneven speed of movement of a tape carrier by recording on a carrier a pulsed pilot signal, reproducing a signal and obtaining a difference signal proportional to the change in speed of carrier 1.

Наиболее близкий по технической сущности и дости1-аемому эффекту к предлагаемому способ измерени неравномерности скорости носител , при котором на носитель затшсывают контрольный сигнал в виде пр мых эквипотенциальных линий, а затем считывают его и определ ют неравномерность скорости носител по разности времени двух последовательно считанных сигналов (2.The closest to the technical essence and achievable effect to the proposed method of measuring the unevenness of carrier speed, in which a control signal is transmitted to the carrier in the form of direct equipotential lines, and then it is read and the unevenness of the carrier speed is determined by the time difference of two successively read signals ( 2

Недостатком известнь1Х способов вл етс снижение точности измерени , обусловленное деформацией носител Е зоне головки воспроизведени .A disadvantage of known methods is a decrease in measurement accuracy due to the deformation of the carrier E in the area of the reproduction head.

Цель изобретени - упрощение точности измерени .The purpose of the invention is to simplify measurement accuracy.

Указа|ша цель достигаетс тем, что в способе каждую пару записанных пр мых эквипотенциальных линий счить1вак т многократно путем многократного сканирювани записи в направлении , прот(1воположном направлению движени носител .This goal is achieved in that in the method each pair of recorded direct equipotential lines is counted several times by repeatedly scanning the recording in the direction opposite to (1 opposite to the direction of movement of the carrier.

На чертеже изображена блок-схема устройства, реализующего предлагаемый способ.The drawing shows a block diagram of a device that implements the proposed method.

Контрольный сигнал в виде пр мых эквипотенциальных линий 1 записывают из неподвижный The control signal in the form of direct equipotential lines 1 is recorded from the fixed

Claims

10 carrier 2. When the tape carrier 2 is moving, the latter is scanned by the beam of the cathode ray tube 3 in the direction opposite to the carrier movement. For scanning the beam, a sweep current from generator 4 is supplied to the deflecting system of tube 3, and to modulate the beam, a backlight signal from source S. Electrostatic power from carrier 2 flows along a circuit: carrier 2 - electrode 6 - a resistor 7. When the scanning beam of each pair of equipotential lines 1 repeatedly crosses the resistor 7, two pulses are generated, which are amplified in the amplifier 8 and fed to the final trigger input 9. The pulses from the trigger output § 39 () through the selector 10 are sent to the AND block, where convert; 1 tots to code that is about It is processed in block 12. The measured value in the form of a code is recorded in block 13. The proposed method, by eliminating errors during repeated scanning of marks in the direction opposite to the carrier movement, makes it possible to increase the measurement accuracy. The method of measuring the unevenness of the speed of movement of a tape carrier, in which a control signal is written to the carrier in h of direct equipotential lines, and the head reads it and determines the velocity of the carrier according to the time difference between two successively read signals, about i that, in order to improve the measurement accuracy, each pair of recorded straight equipotential lines is read many times by each repeated scanning in the opposite direction to the two carrier voltage. Sources of information taken into account in the examination 1. USSR author's certificate number 527845. cl. G 11 B 27/18, 1976.

2. USSR author's certificate N 568077, l. G 11 B 27/10, 1976 (prototype).