SU410321A1 - - Google Patents

Description

I

This invention relates to a radiation measuring technique.

A stroboscopic oscilloscope is known that contains a strobe-pulse shift converter, an adjustable attenuator, a vertical channel amplifier, an electron-beam tube, a sweep generator, two comparison circuits, a counting pulse generator, a counter, a decoding matrix, a trigger, a differential price, a key and a reset generator.

The disadvantage of the known oscilloscope is low speed.

The aim of the invention is to reduce the time for automatically establishing a given vertical image scale. This is achieved by the fact that in the proposed stroboscopic oscilloscope, a selector is connected between the comparison circuit and the counting impulse generator, which is connected to a pulsed oscillator.

The drawing shows a block diagram of a strobosconnect oscilloscope.

It contains a stroboscopic transducer 1 with a strobe pulse shear circuit, a stabilizer attenuator 2, a vertical deflection amplifier 3, a cathode ray tube (CRT) 4, a comparison circuit 5, a counting generator 6, a counter 7, a decoding matrix 8, a comparison circuit 9, differentiating circuit 10, trigger 11, key 12, generator 13, reset, selector 14, pulse oscillator 15, synchronizer 16 and generator 17 sweep.

The signal under investigation in the stroboscopic converter is transmitted through an electrically adjustable attenuator and an amplifier of the vertical channel on a CRT. Electrically controlled output

Attenuator is connected to Comparison 5, the threshold of which is chosen so that when the amplitude of the signal at the attenuator output is close to it, the scale of the image but the vertical on the CRT screen would be convenient for observation at a given screen diameter.

When the amplitude of the signal converted at the output of the attenuator,

is an input signal, extended in duration and approximated by a stepped line, greater than or equal to UQI, the comparison circuit works, and its output pulse, but duration equal to the duration of the converted signal at the UQ level, opens the selector. Then the impulses from the oscillator come to the input of the generator of counting pulses, the frequency of which is much higher than the frequency of the strobe pulses and

more oscilloscope scan frequency. The output pulses of the counting pulse generator are fed to the input of the counter.

The counter switches the decoding matrix, the output voltage of which, determining the amount of attenuation of the electrically controlled attenuator, increases with the number of pulses counted by the counter. In the initial state, when the meter indicator shows zero, the output voltage of the decoding matrix and attenuation of the attenuator are zero. With each pulse counted in the counter, the amplitude of the attenuator output is reduced by an amount Afy.

The adjustment process will last until the amplitude of the signal on the attenuator output becomes less than the trigger threshold of the comparison circuit 5. The vertical scale on the CRT screen will then be equal to a pre-selected value, and the indicator reading (not penalized) of the counter will characterize the true value amplitudes of the signal at the output of the device. If, after the setting mode, the amplitude of the signal at the input of the oscilloscope decreases, then both the amplitude of the transformed signal and the image span vertically on the CRT screen will decrease. A circuit consisting of a comparison circuit 9, a differentiating circuit 10, a trigger 11, a key 12, and a generator 13 of reset pulses is intended to restore the normalized image. The trigger threshold of comparison circuit 9 is determined from the condition UQI-

where f / oi is the threshold of the comparison circuit 5; AU is the step of regulating pulses in amplitude, is the error in normalizing the size of the image.

From the output of the differentiating circuit connected to the output of the sweep generator, a pulse synchronous with the start of the sweep is removed, which, at the input of the trigger, overturns it to the position that opens the key.

The trigger input is supplied with pulses from the output of the comparison circuit 9, to the input of which a signal is output from the attenuator output. If the amplitude of the signal at the output of the attenuator is greater than or equal, then the comparison circuit 9 generates a pulse arriving at the trigger. In doing so, the trigger is tilted to the position locking the key. The output impulse differential 11, yruyn1, e11, the center synchronized with the end of the sweep, will not pass through the key. If a

the amplitude of the signal at the output of the attenuator is less than the level Y, o2, then the comparison circuit 9 does not work. The output pulse, synchronized with the start of the sweep, arrives at the trigger and overturns it, and the key opens. With

This output pulse, synchronous with the end of the sweep, will pass through the public key and reset the reset generator, which resets the meter readings, with the result that the attenuation of the electrically controlled attenuator will be zero. If the amplitude of the signal at the output of the attenuator is equal to or greater than .Uo, then the adjustment process will start again and continue until the amplitude of the signal

the output of the attenuator will become less than t / oi, but more than Uo2, the synchronizer performs the functions known in the stroboscopic oscilloscope.

Subject invention

A stroboscopic oscilloscope containing a stroboscopic transducer with a pulse shear circuit controlled by

attenuator, vertical channel amplifier, cathode ray tube, sweep generator, two comparison circuits, counting pulse generator, counter, decoding matrix, trigger, differentiating circuit, key

and a reset generator, characterized in that, in order to reduce the time for automatically establishing a predetermined vertical scale of the image, a selector is connected between the comparison circuit and the counting pulse generator, which is connected to a pulsed self-oscillator.