SU146995A1 - The method of recording the amplitudes of the pulses on a magnetic drum - Google Patents

Description

A significant disadvantage of the known methods for recording the amplitudes of pulses on a magnetic carrier is the need for high stability of the linear velocity of the carrier, since when the linear velocity changes during the recording process, the recording of the amplitudes of the pulses is incorrect.

The proposed method is free from this disadvantage.

Elimination of the motion instability of the carrier on the recording accuracy is achieved by using as a reference line-step voltage the following are obtained: from the magnetic head reproducing the marker pulses recorded on a separate drum track. The essence of the proposed method is shown in the diagram shown in Letters denote: a is a single pulse reproduced from the first marker track; b - a series of pulses reproduced from the second marker track; s-linear step speed; g is the pulse at the output of the comparison unit; d pulse recording.

On the magnetic drum, marker pulses are recorded on two tracks. One pulse is recorded on the first marker track, n pulses on the second.

On the remaining work paths, the amplitudes of the pulses from some sensors are recorded, and on each such working path, the amplitudes of the pulses from one sensor are recorded.

How many working tracks are there, from as many sensors information can be recorded.

The pulse on the first marker track is positioned in front of a series of n marker pulses recorded on the second track and is intended to set the circuits in the zero state.

No. 146995-2. The band n is selected depending on the required accuracy of the measurement of the amplitudes of the pulses.

Usually, any sensor converts those or other processes into pulse amplitudes with a certain accuracy. Depending on this accuracy, the entire amplitude range of the measured pulses is divided into n discrete equal values.

The pulses from the marker tracks are reproduced all the time and are fed to the linear-step voltage generator. This generator generates periodic linear-step voltage signals (indicated in diagram c), the period of which is determined by the number of drum revolutions, and each step in time is determined by one of the marker pulses reproduced from the second track.

The magnitudes of the steps in the amplitude of the linear-step voltage are the same.

The input pulses from the sensor charge the capacitance to an amplitude value and the potential per eton of the capacitance is compared with a linear step voltage.

At the moment of their equality, a pulse is created at the output of the comparison circuit (indicated in diagram d), which allows the circuit to exit at the output of the circuit to the first After the comparison moment, the marker pulse of the second track (indicated in diagram e). This impulse is recorded on a track corresponding to the sensor from which the input pulse has arrived. The amplitudes of the input pulses located in the range of this step are recorded at the same place of the drum. If it is necessary to fill in more information about the number of pulses of a given amplitude, then each gap is divided between adjacent marker pulses recorded on the second track, on Q. parts and the number of pulses of a given amplitude (in binary) is stored at these places.

The described method greatly simplifies the device for recording the amplitudes of pulse signals on the drum and makes it more reliable and accurate. In addition, the method allows the recording of the amplitudes of the pulses during the continuous rotation of the drum.

The method of recording pulse amplitudes on a magnetic drum, in which the recorded pulses are compared with the reference voltage, and at the time when the amplitudes of the compared stresses are equal, a pulse is recorded on the working track, characterized in that linear-step voltage received from a magnetic head reproducing marker pulses recorded on a separate drum track is used as a reference voltage.