SU731389A1 - Electro-motive force pulse meter - Google Patents

Description

tunable oscillator 3, phase detector 4, smoothing, wilting filter 5, control element 6, indicator 7.

The meter works as follows.

The input signal e (t-) frustrates the frequency of the tunable oscillator 3.

DTPG I S ,,

e (,

Uh

about

where 5ue is cool, because of the control element.

The resistance of the system begins after the end of the pulse e (t). When introducing an AFPG phase mismatch, this phase shift is fulfilled according to the law:

ДТпг (0 (2о / -ЬОо) where К is a proportionality coefficient.

.At the end, and the action of the monoi-emulsion oil channel the transient process begins. The natural frequency of this QO process may be low.

This allows the measured pulse of short duration to be converted into a decaying cosine wave with a proportional impulse area, amplitude and duration.

The transient at the output of the phase detector 4 is measured by the indicator 7.

 (0 L: -5fdDsrpge- cos (Qo -bii3o),

where a is a constant coefficient.

The indicator 7 measures the amplitude of the transient process, and due to the low frequency 2o, the indicator 7 fixes the amplitude of the transient process during one half-period of oscillation. It is also possible to measure the duration of the transient.

If it is necessary to measure a pulse of EMF having a duration of the order of 10 with different amplitudes, the frequencies of the generators 2 and 5 are chosen sufficiently high, comparable in period with the duration of the pulse t.

When measuring the input pulse is converted into phase shift

, le (t} s, dt. about

Such a phase shift with the cosilusal characteristic of the phase detector 4 provides an amplitude of the transient process, which is almost maximal, i.e., a few volts, which can be easily measured with known gauges.

If you limit the amplitude of the input signal to U const, the indicator will be proportional to the duration t. If the input signal is gated to a control element with a constant duration pulse, then the display and the indicator will be proportional to the amplitude of the input signal.

Claims (1)

Invention Formula Pulse meter EMF containing a series-connected control element, adjustable oscillator, phase deGector. And smoothing the filter, the output of which is connected to the first input of the control element, a base generator, a co-driver with one of the inputs of the phase detector, an input device, 1 indi; cator, characterized in that that, in order to improve the accuracy of measuring and expanding the functional possibilities, the output of the input device is connected to the second input of the control element, and the indicator is connected to the output of the phase detector.