SU773460A1

SU773460A1 - Apparatus for measuring magnetic tape tension

Info

Publication number: SU773460A1
Application number: SU792733965A
Authority: SU
Inventors: Рамунас Ромунальдо Балкявичюс; Пятрас-Бенито Пятро Гудавичюс; Леонас Витауто Каваляускас; Аполинарас Казио Куртинайтис
Original assignee: Каунасский Политехнический Институт Им. Антанаса Снечкуса
Priority date: 1979-03-11
Filing date: 1979-03-11
Publication date: 1980-10-23

Description

1one

Изобретение относитс к измерительной технике, а именно к устройствам дл измерени нат жени магнитной ленты.The invention relates to a measurement technique, namely, devices for measuring the tension of a magnetic tape.

Известно устройство дл измерени нат жени магнитной ленты, содержащее чувствительный элемент, соединенный с блоком Е)егистрациИг имеющий возможность контактировани с магнит-10 ной лентой l3 . Это устройство имеет относительно простую конструкцию.A device for measuring the tension of a magnetic tape is known, comprising a sensitive element connected to the unit E) Registration and having the possibility of contacting the magnet 10 l3. This device has a relatively simple design.

Недостаток известного устройства состоит в значительной сложности процесса измерени нат жени магнитной- |5 ленты.A disadvantage of the known device is the considerable complexity of the process of measuring the tension of the magnetic tape.

Известно также устройство дл измерени нат жени магнитной ленты, содержащее сумматор, выход которого 20 соединен через частотомер со входом блока вычислени , микрокомпрессор, соединенный с воздухопроводом, усилители и инвертор И. Это устройство обеспечивает относительную -простоту 25 процесса измерени нат жени магнитной ленты. Недостаток подобного устройства состоит из значительной погрешности результата измерени нат жени магнитной ленты.It is also known a device for measuring the tension of a magnetic tape, containing an adder, the output of which 20 is connected through a frequency meter to the input of the calculator, a microcompressor connected to the air duct, amplifiers and inverter I. This device provides a relative ease of measuring the tension of the magnetic tape. The disadvantage of such a device consists of a significant error in the result of measuring the tension of a magnetic tape.

Цель изобретени - уменьшение погрешности результата измерени нат жени магнитной ленты.The purpose of the invention is to reduce the error in the result of measuring the tension of a magnetic tape.

Указанна цель достигаетс за счет того,что в устройство дл измерени нат жени магнитной ленты введены датчики емкости, укрепленные с противоположных сторон воздухопровода с возможностью размещени с противопопожных сторон магнитной ленты и соединенные со входами усилителей, один из которых подключен к cyf iaTOpy напр жений непосредственно, а другой - через инвертор.This goal is achieved due to the fact that capacitance sensors are inserted into the device for measuring the tension of the magnetic tape, fastened on opposite sides of the air duct with the possibility of placing magnetic tape on the opposite sides and connected to the inputs of amplifiers, one of which is directly connected to the cyf iaTOpy voltage and the other through an inverter.

На чертеже показано устройство дл измерени нат жени магнитной ленты.The drawing shows a device for measuring the tension of a magnetic tape.

Claims

The proposed device contains capacitance sensors 1, mounted on opposite sides of the air duct 2 connected to the microcompressor 3. The capacitance sensors 1 are mounted to be placed on opposite sides of the magnetic tape 4 and connected to the inputs of amplifiers 5. One of the amplifiers 5 is connected to an adder 6 for example life directly. of course, and the other amplifier 5 through an inverter 7. The output of the voltage adder b is connected via a frequency meter 8 to the calculation block 9. In the proposed device, in the process of measuring, a stream of air coming from the air duct 2 excites transverse oscillations of magnetic tape 4. These oscillations excite signals of the same frequency in capacitance sensors 1, which are amplified by amplifiers 5. One of these signals is fed to adder 6 voltage directly, and the other after inverting. The use of the invention will significantly reduce the error of the measurement result on the magnetic tape. Claims An apparatus for measuring the tension of a magnetic tape, comprising a voltage adder, the output of which is connected via a frequency meter to the input of a calculating unit, a microcompressor connected by a Q duct, amplifiers and invitor, characterized in that capacitance sensors, mounted on opposite sides of the duct with the possibility of placing on opposite sides of the magnetic tape and connected to the inputs of amplifiers, one of which is connected to the bag Ator voltage directly, and the other - through an inverter. Sources of information taken into account during the examination 1. USSR author's certificate 389843, cl. G 01 L 1/10, 1972.

2. US patent 3394587, cl. 73-143, 1968 (prototype).