SU114334A1 - Method for multi-channel magnetic recording-reproducing low-frequency physiological processes - Google Patents
Method for multi-channel magnetic recording-reproducing low-frequency physiological processesInfo
- Publication number
- SU114334A1 SU114334A1 SU588362A SU588362A SU114334A1 SU 114334 A1 SU114334 A1 SU 114334A1 SU 588362 A SU588362 A SU 588362A SU 588362 A SU588362 A SU 588362A SU 114334 A1 SU114334 A1 SU 114334A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- physiological processes
- magnetic recording
- recording
- channel magnetic
- reproducing low
- Prior art date
Links
Description
Одновременную многоканальную запись нескольких низкочастотных физиологических процессов осуществл ют способом усилени кансдого процесса отдельным каналом усилительного устройства с регистрацией процесса на общую ленту в виде многодорожечной записи. При таком способе регистрации устройство получаетс сложным и имеет место, так называема «перекрестна модул ци , внос ща искажение в запись. Описанный способ многоканальной магнитной записи - воспроизведени низкочастотных физиологических процессов свободен от указанных недостатков. Многоканальность записи обеспечиваетс тем, что дл каждого записываемого процесса подбираетс сво несуща частота в пределах 1000-3000 гц, поскольку высша частота больплинства физиологических процессов не превыщает 100-150 гц. Совокупность предварительно усиленных и модулированных сигналов, в свою очередь, усиливаетс одним общим усилителем, после чего подаетс на записывающую головку магнитофона. При воспроизведении сигнал усиливаетс общим предварительным усилителем и затем каждый процесс выдел етс узкополосным фильтром, настроенным на несущую частоту, детектируетс и подаетс на свой конечный усилитель.Simultaneous multichannel recording of several low-frequency physiological processes is carried out by a method of enhancing the process by a separate channel of an amplifying device with recording the process on a common tape as a multi-track recording. With this method of registration, the device becomes complex and there is a so-called "cross modulation, a distortion of the recording. The described method of multichannel magnetic recording — reproduction of low-frequency physiological processes is free from the indicated drawbacks. The multichannel recording is ensured by the fact that for each recorded process the carrier frequency is selected within 1000-3000 Hz, since the higher frequency of the greater part of the physiological processes does not exceed 100-150 Hz. The set of preamplified and modulated signals, in turn, is amplified by one common amplifier, after which it is fed to the recording head of the tape recorder. During playback, the signal is amplified by a common pre-amplifier, and then each process is allocated by a narrow-band filter tuned to the carrier frequency, detected and fed to its final amplifier.
На чертеже представлена блок-схема устройства дл осуществлени способа, где:The drawing shows a block diagram of an apparatus for carrying out the method, where:
/а, 2а, За-предварительные усилители;/ a, 2a, Over-pre-amplifiers;
А, Б, В - входы предварительных усилителей;A, B, C - preamplifier inputs;
16, 26, 36 - модул торы сигналов;16, 26, 36 — signal modulators;
4- общий конечный усилитель;4- common end amplifier;
5- магнитна головка магнитофона (ГЗ - записывающа , ГВ - воспроизвод ща );5- magnetic tape recorder head (GZ - recording, GW - reproducing);
6 - предварительный усилитель воспроизведени ;6 - preamp amplifier;
1в, 2в, Зв - узкополосные фильтры каналов;1v, 2v, Sv - narrowband channel filters;
1г, 2г, Зг - детекторы и конечные усилители соответствующих канаJ . ,;1d, 2d, 3g - detectors and final amplifiers of the corresponding channels. ,;
Г, Д, -выходы конечных усилителей.G, D, -outputs of the final amplifiers.
Предмет изобретени Subject invention
Способ многоканальной магнитной записи-воспроизведени низкочастотных физиологических процессов, отличающийс тем, что, с целью устранени перекрестных искажений при многоканальной записи и упрощени самой записи, последнюю производ т на магнитный носитель одной головкой -с применением различных несущих частот по каждой записи , а при воспроизведении дифференцировка процессов осуществл етс узкополосными фильтрами, настроенными на соответствующие использованные несущие частоты.A method of multichannel magnetic recording-reproduction of low-frequency physiological processes, characterized in that, in order to eliminate cross-sectional distortions during multichannel recording and simplify the recording itself, the latter is produced on a magnetic carrier with one head using different carrier frequencies for each recording, and during reproduction differentiation The processes are carried out by narrowband filters tuned to the respective used carrier frequencies.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU588362A SU114334A1 (en) | 1957-12-21 | 1957-12-21 | Method for multi-channel magnetic recording-reproducing low-frequency physiological processes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU588362A SU114334A1 (en) | 1957-12-21 | 1957-12-21 | Method for multi-channel magnetic recording-reproducing low-frequency physiological processes |
Publications (1)
Publication Number | Publication Date |
---|---|
SU114334A1 true SU114334A1 (en) | 1958-11-30 |
Family
ID=48386713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU588362A SU114334A1 (en) | 1957-12-21 | 1957-12-21 | Method for multi-channel magnetic recording-reproducing low-frequency physiological processes |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU114334A1 (en) |
-
1957
- 1957-12-21 SU SU588362A patent/SU114334A1/en active
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