SU660089A1 - Method of measuring lateral oscillation of moving electrostatic record carrier tape - Google Patents

Description

The control signal is recorded by a cathode-ray tube (CRT) 1, which is fixed to an impregnable rigidly to a fixed electrode 2 and a moving carrier 3 (Fig. 1). The deviation of the beam is driven by the submission of the amplified snigal of the control oscillator 4 through an electronic switch, controlled by the imimage generator 6, the amplifier 7, onto the deflecting coil 8 of the tube. In comparison diagram 9, emulsions are generated to the cathode potential block 10 and to the control key generation circuit 11 of the electronic key 12, through which the signal amplified by the amplifier 13 sends an amplitude-pulse modulation to the pulse-modulated modulator 14 and then to the block 15 e to us

In another case (Fig. 2), the recorded control signal on the carrier is reproduced using CRT 16. The beam is controlled by the generator 17 when the voltage is applied to the deflecting system 18. The playback takes place with a fixed carrier, which after one scan to the next is moved a stepper vibration motor 19, whose operation is controlled by generator 20. For correction of carrier movement, a correction system 21 is applied, the signal of which controls the operation of generator 20. During playback, the signal from the cat One unit 22 through the amplifier 23 is fed to a pulse-width modulation converter 24 in a code-emulsion modulation and then to a subtraction unit 25.

The vibration measurement method is carried out as follows.

The pilot signal generator 4 produces a sawtooth voltage of constant frequency and amplitude, which is fed to the electronic key 5. The electronic key is controlled by a pulse generator 6, which is strictly synchronized with the generator 4. The amplifier 7 provides amplification so that the electron beam is deflected by CRT line width 1.

In comparison circuit 9, control pulses are generated by blocks 14 and 10 to illuminate or quench the electron beam, and thereby control the recording of the control signal and control the recording of the signal about the perpendicular vibrations of the carrier to the electronic memory block 15.

Illumination pulses 26 of short duration (Fig. 3) are needed to apply the service marks required for reproduction, while longer pulses 27 characterize the length of the recorded line in the middle of the carrier. This pulse is extracted by circuit 11.

control pulses and controls the key 12.

During recording, when the carrier oscillates perpendicularly, the capacitance between the screen electrodes and the carrier changes. The charge on the carrier is transferred directly to the proportional ratio of this capacitor, which causes a change in the magnitude of the current through the counter electrode 2. The change in the amplitude depends on the perpendicular oscillations of the carrier. This signal is amplified by the amplifier 13 and through the key 12 during the recording of the control signal is transmitted to the converter 14 and further to the electronic memory block 15. Information is recorded on the carrier in the form of a latent charge, which depends on the ionorechny and perpendicular vibrations of the carrier during recording, since the beam is focused in the static position of the carrier.

Playback is performed using a second CRT 16, using the same medium with recorded checklists.

Signals and string labels. The measurement of transverse recording vibrations is carried out in the static position of the carrier at the places where labels are recorded. To determine the consistency of the writing line with labels, a correction system 21 is applied, which generates a signal, stopping the vibromotor 19 and triggering the beam control generator. The beam that passes through the line impresses the width of the control string modulated in duration by transverse vibrations and perpendicular vibrations of the carrier. The second service tag starts the vibromotor 19 until the next match. The signal goes to

the transducer 24. From the code of this signal, the stored code about perpendicular vibrations is subtracted and a signal proportional to the transverse vibrations of the carrier is obtained when recording.

Claims (2)

Invention Formula Measurement of transverse vibrations a moving electrostatic recording medium, which includes recording a control signal using a first cathode ray tube with a metal fiber screen by scanning a tube of a carrier and simultaneously removing the recorded signal from the tube’s electrodes, and converting the amplitude of this signal into a code and storing it, reproducing the signal using a second cathode ray tube with a metal fiber screen, converting the duration of the pulses of the reproduced signal into a code and you reading the stored and received code, characterized in that, in order to increase the measurement, simultaneously with the recording of the control signal, the service marks of the beginning and end of the scanning lines are placed on the carrier, and playback is performed from the fixed carrier line by line, stopping the carrier at the moments of the scanning beam with service marks. Sources of information taken in attention during exertize 1. For hell 2394921, cl. G IV 27/10, 1976, according to which the decision to issue a copyright certificate. 2. For K К ° 2457627, cl. G 11B 27/10, 1977, according to which the decision to issue a copyright certificate. rig.2. 2.e Z7 / I