SU1597916A1 - Vibrated tape transport device - Google Patents

Abstract

The invention relates to a vibration technique and can be used in a tape mechanism for highly stable stepping tape. The invention makes it possible to increase the stability of the repetition of the step movements of the tape. The device contains a cylindrical rack 1, to which an annular piezoceramic element 2 is attached, which is frictionally coupled to a tape 3. Its single electrode is divided into segments 4.5, which are connected to a power and control device made in view of the main generator 6. The output of the latter is connected to the input of the binary counter 7, the input of the zero setting of which is connected to the output of the additional generator 8, and the output is connected in series with the code converter 9, the code-amplitude converter 10 and the power amplifier 11. The output of the amplifier is connected via a switch 12 to one segment, for example 4, directly, and to segment 5 via a capacitor 13. 2 sludge.

Description

Phii.1

The invention relates to the field of instrumentation, in particular to magnetic recording, and can be used in tape-making mechanisms for special purposes.

The aim of the invention is to increase the stability of the repetition of the tape's walking movements.

FIG. 1 shows the device, a general view; in fig. 2 - voltage waveforms at its characteristic points.

The device contains a cylindrical rack 1, to the cylindrical surface of which an annular piezoceramic element 2 is attached, whose outer cylindrical surface is frictionally coupled to leite 3, one electrode of which is divided into segments 4 and 5, and the other undivided electrode is grounded (not shown). The output of the main generator 6 is connected to the counting input of the binary counter 7, and the output of the additional generator 8 is connected to the input of the zero setting of the binary counter. Its bit outputs are connected to inputs of a code converter 9 and through a code converter 10, the amplitude is connected to the input of an output amplifier by one of the segments, for example, 4, directly, and the other segment 5 is connected to the output of power amplifier 11 through a capacitor 13.

The device works as follows.

In the initial state, the binary counter 7 is inhibited, the voltage on the piezoceramic element is not supplied and the tape 3 is inhibited. When a square-wave signal is applied from the additional generator 8 (FIG. 2), the counting of pulses starts at the counting input from the main generator 6 (FIG. 2a). At the outputs of the counter bits (a three-bit counter), pulses appear (Fig. 28, d, e). To form a sinusoidal signal, a converter circuit 9 is used, by means of which the voltage coming from a binary counter is converted into a coded voltage, the form of which is shown in the oscillogram (Fig. 2d, g, g). The subsequent voltage processing with the help of a 10-code-to-transducer generates a rectangular step voltage (Fig. 2m), the envelope of which is close to the sinusoidal form (Fig. 2k). A multistage, close to sinusoidal form, the voltage is amplified by a power amplifier and fed through a switch 12 to one segment, for example, 4, directly, and to segment 5 -

Through a capacitor 13, which shifts the voltage phase by 90 ° (Fig. 2a), under the action of these voltages, running mechanical oscillations occur in the annular piezoceramic element, the duration of which corresponds to the duration of the control pulse. Under the action of this impulse, the running mechanical oscillations on the surface of the belt lastly carry out a stepwise displacement, for example, from left to right. To change the direction of movement of the belt, the switch 12 is set to the opposite position, in the piezoceramic ring, the running mechanical oscillations change their direction of propagation and the belt performs a stepwise movement in the opposite direction. Due to the introduction of tight synchronization, the initial phase of excitation of the piezoceramic element does not depend on the moment of arrival. control signal and occurs with a constant initial phase, which significantly increases the stability of the step movements of the tape.

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Claims (1)

Invention Formula A vibration tape device containing a main generator, a power amplifier, a switch, a cylindrical rack to which an annular piezoceramic element is attached, the outer cylindrical surface of which is frictionally coupled to the tape, and one of the electrodes consists of three segments, one of which is connected to the first electrode the switch directly and through the phase-shifting circuit with another segment and the second electrode of the switch, with the common electrode of the switch connected to the amplifier output Power, and the second electrode of the ring piezoelectric element connected to a common bus, characterized in that, in order to increase the stability of the repetition of stepping movements of the tape, a binary counter, a code converter, a code-amplitude converter, an additional generator, the output of the main generator connected to the counting input of the binary counter, and bit outputs are entered into it which is connected to the inputs of the code converter, the output of the additional generator is connected to the input of setting the zero of the binary counter, and the output of the code converter through the code converter is the amplitude of the connection chen to the input of the power amplifier. Q l1l tgi1G111l llp11p 5 in d de 3 g -ppo s l P h 2