SU505960A1 - Method of measuring fluctuations in the speed of movement of a magnetic tape - Google Patents
Method of measuring fluctuations in the speed of movement of a magnetic tapeInfo
- Publication number
- SU505960A1 SU505960A1 SU2030362A SU2030362A SU505960A1 SU 505960 A1 SU505960 A1 SU 505960A1 SU 2030362 A SU2030362 A SU 2030362A SU 2030362 A SU2030362 A SU 2030362A SU 505960 A1 SU505960 A1 SU 505960A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- magnetic tape
- movement
- speed
- measuring fluctuations
- noise signals
- Prior art date
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Description
1one
Изобретение относитс к измерительной технике, а именно к способам измерени колебаний скорости движени магнитной ленты,The invention relates to a measurement technique, in particular to methods for measuring fluctuations in the speed of movement of a magnetic tape,
Извест-ен способ измерени колебанийKnown method of measuring oscillations
скорости движени магнитной ленты путем воспроизведени сигналов шума в двух точках вдоль направлени движени магнитной ленты. При известном способе колебани скорости движени магнитной ленты опреде- л ют путем воспроизведени записанных на ней сигналов. Однако известный способ вносит значительные искажени в результат измерени , возникающие в процессе записи этих сигналов.magnetic tape speeds by reproducing noise signals at two points along the direction of the magnetic tape movement. With the known method, the fluctuations in the speed of movement of the magnetic tape are determined by reproducing the signals recorded on it. However, the known method introduces significant distortions in the measurement result arising in the process of recording these signals.
По предлагаемому способу с целью уменьшени погрешности измерени магнитную ленту намагничивают посто нным магниным полем и производ т измерение переменной составл ющей коэффициента автокоррел ции между воспроизведенными сигналами щума в двух точках вдоль направлени ее движени .In the proposed method, in order to reduce the measurement error, the magnetic tape is magnetized by a constant magnet field and the variable component of the autocorrelation coefficient between the reproduced schum signals at two points along its direction of motion is measured.
Измерение колебаний скорости движени магнитной ленты производ т следующим образом . Магнитную ленту намагничивают по всей ее длине посто нным магнитным попем . После этого производ т воспроизведение сигналов шума в двух точках вдоль направлени движени магнитной, ленты. Сигнал шума в каждой точке представл ет собой нормальный стационарный случайный процесс с равномерным спектром частот в некоторой полосе частот. Сигналы шума в обеих точках идентичны и сдвинуты на врем , равное времени перемещени элемента магнитной ленты из одной точки в другую. По результату измерени переменной состал ющей коэффициента автокоррел ции между воспроизведенными сигналами шума в двух точках определ ют колебани скорости движени магнитной ленты.The measurement of the oscillation of the speed of the magnetic tape is carried out as follows. The magnetic tape is magnetized along its entire length by a constant magnetic field. Thereafter, the noise signals are reproduced at two points along the direction of movement of the magnetic tape. The noise signal at each point is a normal stationary random process with a uniform frequency spectrum in a certain frequency band. The noise signals at both points are identical and shifted by a time equal to the time that a tape element moves from one point to another. The measurement of the variable component of the autocorrelation coefficient between the reproduced noise signals at two points determines the fluctuations in the speed of movement of the magnetic tape.
Предлагаемый способ позвол ет не только уменьшить погрешность измерени , но и упростить сам процесс измерени .The proposed method allows not only to reduce the measurement error, but also to simplify the measurement process itself.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2030362A SU505960A1 (en) | 1974-06-07 | 1974-06-07 | Method of measuring fluctuations in the speed of movement of a magnetic tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2030362A SU505960A1 (en) | 1974-06-07 | 1974-06-07 | Method of measuring fluctuations in the speed of movement of a magnetic tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU505960A1 true SU505960A1 (en) | 1976-03-05 |
Family
ID=20586582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2030362A SU505960A1 (en) | 1974-06-07 | 1974-06-07 | Method of measuring fluctuations in the speed of movement of a magnetic tape |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU505960A1 (en) |
-
1974
- 1974-06-07 SU SU2030362A patent/SU505960A1/en active
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