SU1720026A1 - Method of generator monitoring by generalized parameters of periodic pulses train - Google Patents

Abstract

The invention relates to the technique of electrical measurements and can be used to control generators according to the generalized parameters of a periodic pulse sequence, mainly in the presence of a bias voltage. The purpose of the invention, the reduction of hardware costs, is achieved by reducing the range of directly measured parameters, namely eliminating the measurement of the effective voltage of the variable component of the signal. The method includes the following operations: changing the initial pulse frequency, measuring the mean voltage of a variable component of a signal at this frequency, changing the frequency of a pulse following, measuring a changed pulse frequency, measuring the average voltage of a variable component of a signal at this frequency, calculating the generalized pulse parameters according to the appropriate formulas. 1 il. with C

Description

The invention relates to the technique of electrical measurements and can be used to control generators according to the generalized parameters of a periodic pulse sequence, mainly in the presence of a bias voltage.

The purpose of the invention is to reduce hardware costs by reducing the range of directly measured parameters.

The method is carried out as follows.

The part Ft (period) of the pulse following is measured, the mean voltage Ui of the variable component of the pulses of the original periodic sequence. Further, the pulse frequency changes to a certain fixed value F2, convenient for the operator, the frequency (period) of the pulse pulse, the average wired voltage U2 of the variable component of the pulses at the changed frequency is measured. Next, the sought-for generalized signal parameters are calculated: 00 — generalized pulse duty cycle; G0 - the generalized pulse duration; U0 - the generalized amplitude according to the formulas

  U Q0U,

2 –I ° Fi-Q0 2 (K-1)

U K

-one

.y ui. to FI: u2

Xi

GO

oh oh

Yu

Os

- - to

i. YY 1h14

 2 (K-1) where U is the average value of the initial unbiased pulse sequence.

The drawing shows timing diagrams explaining the method, where 1a is the initial periodic sequence of pulses; 1 b - variable is the component of the voltage of this sequence (the point shows the level of the average voltage of the variable component of the signal); 1 v - the same periodic sequence with an altered repetition rate; 1 g - variable signal component).

The pulse shape is shown rectangular for consistency. In this case, Dm Uo, tn to. The symbols Ui and U2 denote the mean values of the voltages of the unbiased signals at the frequency FI and Fa.

Claims (1)

Invention Formula The method of controlling the generator according to the generalized parameters of a periodic pulse sequence, including measuring the initial pulse frequency FI, changing the initial pulse frequency, measuring the changed pulse frequency F2, measuring the average measured voltage and №с at a varying pulse frequency, which is also distinguished by the fact that, in order to reduce hardware costs, the average voltage Ui is measured by the variable component of the signal at the initial pulse frequency FI and the desired values of the generalized Qo, the generalized amplitude Uo and the generalized duration t0 of pulses by the formulas Y 2 (K-1) where U is the average voltage value of the original unbiased pulse sequence. Tft-tt 0