SU444122A1 - Device for measuring the area of electrical impulses - Google Patents

Description

one

The invention relates to a pulse technique, in particular to measurements of the parameters of electrical pulses, performed in studies of the analytical parameters of substances by an acoustic pulse method, acoustic diagnostics of mechanisms and acoustic logging, when the results of measurements of the shape and energy of pulses contain information about the properties of substances or the processes under study. .

Known devices containing a quartz oscillator, a key, a counter and a gate driver.

However, the known devices have insufficient accuracy and measurement range.

The aim of the invention is to improve the accuracy and the expansion of the measurement range.

To do this, an amplitude discriminator, a frequency divider and an adjustable delay circuit are entered into the device, the sensor output of the pulses under study is connected to one amplitude discriminator input, the sawtooth voltage generator output is connected to another input, and the amplitude pulse discriminator output is connected to the gate pulse generating unit connected to the output of the sync pulse generator, and the output to the input of the sawtooth generator and the input of the circuit with an adjustable delay, the output of which is connected chen to the counter.

The invention is illustrated in the drawings.

FIG. 1 shows a block diagram of the device; in fig. 2 - stress diagrams.

A device for measuring the area of electrical pulses contains a crystal oscillator 1, a key 2, a counter 3, a gate driver 4, a pulse sensor 5, an amplitude discriminator 6, a saw voltage generator 7, a clock driver 8, a frequency divider 9 and an adjustable delay circuit 10 .

The device works as follows.

The studied pulses with duration t and repetition period ti (see Fig. 2, a) are received from the sensor of the pulses under study 5, to the first input of the amplitude discriminator 6 with a controlled trigger threshold and to the sync pulse generator 8, the output pulses of which (see. 2 , b) are fed to frequency divider 9 with a division factor of L.

The output signal of frequency divider 9 (Fig. 2, b) controls the operation of the saw-tooth generator 7. The period T of the saw-tooth voltage is N times the period of the pulses under study / j.

3

The maximum amplitude of the sawtooth must be equal to or greater than the amplitude of the pulses under study.

The second input of the amplitude discriminator 6 is supplied with a sawtooth voltage from the generator 7 (see Fig. 2, d), given a response of the discriminator 6. The latter produces pulses corresponding to the moments of equal (insignificant excess) of the current value of the pulses under study to the level of the saw voltage (/ п and к) - The output signal from the gate generator 4 (see. Fig. 2, d) controls the key 2, through which the reference frequency pulses from the crystal oscillator 1 (see. 2, e) go to the counter 3 making them summation over time T.

The readings of counter 3 will be proportional to the area of the electrical impulses. The control of the pulse counter by a strobe, whose temporal position can be changed by means of an adjustable delay circuit 10 (see Fig. 2 g), makes it possible to measure the pulse duration at a predetermined level.

Subject invention

A device for measuring the area of electrical pulses, containing a series-connected quartz oscillator, a key and a counter, a gating pulse shaping unit connected to the second key input, a sensor of the pulses under study, to the output of which a clock generator is connected, a sawtooth generator, characterized in that In order to improve the accuracy and expand the measurement range, an amplitude discriminator, a frequency divider and an adjustable delay circuit are introduced into it, and amplitude control output connected diskrimiiatora investigated the pulse, to the other - the output of the sawtooth generator, and the output

the amplitude discriminator is connected to the gate generating unit, the input of the frequency divider is connected to the output of the clock generator, and the output is connected to the input of the nilo voltage generator and the input of the circuit with adjustable delay, the output of which is connected to the switch.

well