SU601630A1 - Phase-code converter - Google Patents

Description

(54) PHASE CODE CONVERTER

The invention relates to the field of measurement technology and is intended to measure the phase angle of multiple assembly phase shifters in a wide dialazone. It can be used as a measurer of movements of various objects, for example, in software control systems.

Phase-to-code converters are known, made on similar logic elements and providing measurement of phase shift angle 1.

These devices are quite complex and do not provide transformations in a wide range.

A phase-to-code converter is known that contains (input drivers, a pulse generator, and an I1 reversible counter 2. This converter does not allow determining the rate of change of the phase angle, has a low speed and a limited conversion range.

In order to monitor the phase shift angle in a wide dialzone, improve speed and obtain information about the rate of change of the phase shift angle into the proposed phase-code converter containing input drivers, a pulse generator, a counter and a reversible counter, an additional element is introduced

"2I-2NEY-2 OR. Multiple delay line and the element" I. At the same time, the element 2I-2IEI-2 OR is connected in parallel to the output of the input drivers, the multi-link LIN1S delay is connected to the output of the element 2I-2PEP-2 OR, the element AND connects the inverse outputs of the counter. The counter input of the counter is connected to the output of the 2I-2IEII-2 OR element and the filling pulse generator; The counting input of the reversible counter is connected to the output of the “AND” element and the first branch of the back-up line, and the inputs and subtractions are connected to the output of the “2I-2NEE-2 11I” element and the outputs of the last digit of the counter.

The drawing shows a diagram of a phase-code converter.

The converter contains input shapers /, 2, the element 2I-2NEI-2 OR 3, the reversing counter 4, the multi-link delay line 5, the counter 6, the generator 7 of filling pulses, the element And 5.

Pr 1-square pulses from the input shapers 1 and 2 are fed to the inputs of the element 3, which forms the pulses of the presence or absence of input strains. In the absence of a signal at the output of electric & 5, the number of pulses, proportional to the phase shift angle, enters counter 6 from generator 7. Thus, in one period of the stresses under study, the required number of pulses is entered twice into the chuck 6. The maximum number of input pulses corresponds to a phase angle of 180 °.

Further, in the converter, an entry is made in the counter 6 of the code of the corresponding bits of the roar, pcI | B, of the counter 4, imulses received on the counting input of the counter 6, the code written in it is described; if the code is not fully described, one is subtracted from the reversible counter 4; if the remainder in the counter is zero, changing the state of the reversible counter is not required; the frequency and the sign of the corrections introduced into the reversible counter are estimated 4 and the direction and rate of change of the angle of the phase is determined.

Antagonized operations are implemented as follows. The signal from the output of element 3 stops the description of the code received in the counter 1K 6, and in the reversible counter 4, depending on the state of the most significant bit of the counter, the sign of a possible amendment is established. An indication of the need for a correction is the absence of signals on the And 8 element (the remainder of the counter code description is not zero). Introducement allowance (Corrections to the reversible counter come from the first retraction of the delay line 5. The signal from the second retraction of the delay line reverses the counter, and the signal from its exit to the counter 6 carries information from the corresponding reversible counter bits. .

As a result, in each period of the investigated voltages, the counter code (the code of the current value of the phase angle) is compared twice with the kodo (M corresponding bits, reversible counter wires (the result of the previous measurement) and the corresponding correction is made, i.e., the phase shift tracking mode The input logic of the reversible counter provides information about the direction and rate of change of the phase angle.

Claims (2)

1. USSR author's certificate No. 402819, cl. G 01 R25 / 00, dated 07.03.72. 2. The copyright certificate №473120, cl. G 01 R 25/00, from. 07/17/73