SU1257536A1 - Method of recirculation measuring of amplitudes of short single pulses - Google Patents

Abstract

This invention relates to a measurement technique. The aim of the invention is to improve the measurement accuracy. To achieve this goal, the method provides for a change from period to period by K times the reference value of voltage, where K is the transfer coefficient of the circulation loop. In this case, changing the reference value of the voltage and counting the pulse of the sequence is carried out as long as the condition Uxn К x X is satisfied and, where Ujf is the amplitude value of the corresponding pulse of the sequence, | в is the sequence number of this pulse, and voltage value. A device that implements the method contains an adder 1, a subtract- 2, a delay unit 3, a comparator 4, a pulse counter 5, a source 6 of tunable reference voltage. 1 il.

Description

The invention relates to electrical measuring equipment.

The purpose of the invention is to improve the measurement accuracy.

The proposed method is as follows.

The measured single pulse U is represented as uniformly regressing from period to period by an exemplary value of voltage and a sequence of pulses circulating in the circuit. In this case, the pulses of the resulting sequence are counted. The reference voltage varies from period to period by K times, where K is the transfer coefficient of the circulation loop. The variation of the reference voltage and pulse counting of the sequence are carried out as long as the condition

- Ux;) ,,,

where - x is the amplitude value of the corresponding .pulse sequence;

fJ is the sequence number of the pulses of the sequence (circulation number) The resulting number of pulses is proportional to the sought amplitude of the measured pulse.

The drawing shows a block diagram of a device for implementing the method being predicted.

The device contains an adder 1, the first input of which is the input of the device, and the output is connected to the first input of the subtractor 2, whose output through the delay unit 3 is connected to the second input of the adder 1, and also connected to the first input of the paraparameter 4, the output of which A pulse counter 5 is connected to the control inputs of the source 6 of a tunable reference voltage, the output of which is connected to the second inputs of the driver 2, and the comparator 4. The outputs of the counter 5 are the outputs of the device.

The device works as follows.

When fed into the circulation circuit formed by adder 1, subtractor 2 and block 3 delay, pulse, amplitude value U ,; which is to be measured, a uniformly regressing (uniformly) decay 11 occurs; a) a recycling process with a period t (tea delay time of the block 3 delays, and moreover, is necessary.

575362

so that tan t ,, e is the maximum value of the duration of the pulses, the amplitudes of which are subjected to a measurement).

5 Before the first circulation, the source 6 of the tunable reference voltage generates a voltage with the value U (U, is the meter quantization step, chosen based on

o required measurement accuracy). As a result, at the outlet of the circulation circuit, i.e. at the output of the subtractor 2, a pulse is generated, the amplitude value of which is U, Uy - Q ,. With

15 Ujf U. operates the comparator 4 and in the counter 5 it is fixed by the first compass 1.1, and the source 6 generates a voltage with the value KU. As a result of the second circulator at the exit of the circulation circuit, a pulse is generated, the amplitude value of which

Uxj Ki, - Ki ,, K (U) t - and,) - -. ,

25 At Uy 5- KU,:,. F, in the counter 5, the second circulation is fixed, and the source 6 generates a voltage, -.

The specified process continues.

30 until Their r K 1,, where the sequence number of the pulses of the sequence at the output of the circulation circuit {L 1,2,3,.,., P. At the same time, the number recorded in the counter 5,

3J will be a 1.frame measurement result.

Note that as the pulse counter is filled, the source 6 sequentially produces exemplary voltages with values respectively: before the first circulation - U., before the second - Ki, the third - RC .., the fourth -, .-, and t .d., to the nth ().

 - The conversion function of this measurement method has VHC

, - nu ,,) ,,.

Considering that the ideal mode conversion function appears as

and - nU

9T

 ,

determine its relative measurement error

(y,) ()

and, - nu7 i.e. relative error due to the coefficient of transmission)

3

The recirculator is completely eliminated by the proposed method.

In the general case, the transfer ratio of the recirculator is determined by the inflow

To Kj,. K - Kg,,

where KC, KP, B are the transfer coefficients respectively of adder 1, you are reader 2 and block 3 are delays. In the considered case, it is assumed that K, - K t, i.e. K K, ..

Claims (1)

Invention Formula A method of recirculating measurement of the amplitudes of short single pulses, which consists in representing the measured pulse as uniformly regressing from period to period to an exemplary value of the voltage U of a sequence Editor M.Petrova Order 4912/42 Tehred L.Oleynik Proofreader Circulation 728 Subscription VNIIPN USSR State Committee for inventions and discoveries 113035, Moscow ,. Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, Projecto st., 4 575364 pulses circulating in the circuit and pulse counting, according to the number of pulses obtained by counting, the amplitude of the measured pulse, judged by the fact that, in order to increase the measurement accuracy, the reference value of the voltage varies from period to the period to K times, where K is the transfer coefficient of the circulation loop, and the change in the reference voltage value and the pulse counting of the sequence are carried out until t5 while the condition is met . five ," where Uy is the amplitude value of the corresponding pulse of the sequence-, 0 / pulse sequence number sequences. Compiled by S.Rybin Tehred L.Oleynik Proofreader M.-Samborska