SU864177A1 - Follow-up phase-to-code converter - Google Patents

Description

The invention relates to a measuring technique — phaeometry and can — be used in devices and systems for various purposes, where it is necessary to * * _{(it is} necessary to monitor the phase angle in a wide range of angle changes. A phase converter is known - a code containing input shapers, frequency dividers, reversing - | counter, control unit and logic elements (1).

The disadvantage of the converter is the inability to track the phase angle and obtain information about the rate of change of the phase angle 1, the great complexity, reducing the reliability of the work.

A known phase converter is a code containing a driver, 2 flip-flops, AND elements, pulse generators, a counter, a unit for comparing CRTs and a forming unit [2].

The disadvantage of the converter is its small measurement range, 2 which does not exceed 360 °, as well as low reliability due to complexity.

The purpose of the invention is the expansion of the operating range and increase reliability. 3

The aim of the invention is achieved by the fact that the tracking Converter, containing a pulse generator, a frequency divider and a reversible counter, is equipped with a phase discriminator and a correction unit, and the output of the pulse generator is connected to one of the inputs of the phase discriminator and the first input of the correction unit, the second and third inputs of which are connected respectively to the first and second outputs of the phase discriminator, connected respectively to the first and second inputs of the reverse counter, the output of the correction unit through the divider you are connected to a second input of the phase diskrimintatora.

The correction unit is equipped with an OR element, the first and second inputs of which are connected respectively to the outputs of the FORBID element and the delay line, the output is the output of the correction unit, and the first, second and third inputs are the first and second inputs of the FORBID element and the input of the delay line.

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

Tracking phase-converter - the code contains a pulse generator 1, phase discriminator 2, correction block 3, frequency divider 4, a reverse counter 5. The correction block includes an OR 6 element, a power line 7 and a BANNER element 8. ’

The converter operates as follows.

The pulses of the generator 1 through ele-. COP 8 is PROHIBITED and the element OR 6 is BLO. 3 corrections are fed to the input ~ of the 4 frequency divider. At the output of the divider, rectangular pulses are formed, the frequency of which is equal to the frequency of the voltage under study. Phase discriminator 2 with paraffin outputs 15 converts the phase shift of the voltage under study relative to the reference to the corresponding time intervals, one of which corresponds to the positive and negative to the angle of shift-ed • That phase, as soon as the duration of the time interval becomes equal to or longer than the period following the generator pulses, at one of the outputs of the phase discriminator, depending on the sign of the angle of phase shift, a correction pulse appears. If an impulse appears at the positive output of the phase discriminator, it arrives at element 8 of the FORBID block 3 of correction and prevents the passage of one pulse through it. As a result, the time of the formation of the reference voltage by the frequency divider 4 increases by one period of the pulse of the generator 1 and the reference voltage monitors the test. When a pulse appears on the negative output of the phase discriminator, it passes through the delay line 7 and the OR element b of the correction unit 3 to the input of the divider 4. The time of the formation of the reference voltage by the frequency divider decreases by the period the generator pulses follow, and the reference voltage monitors the test. Reverse counter 5 sums the correction pulses taking into account their sign and generates the value of the phase angle. The range of phase angle change is determined by the capacity of the reversible counter. The frequency of the correcting pulses is proportional to the rate of change of the phase angle.

The phase converter is a code, providing ayu’s tracking of the phase angle in any direction and a wide range, as well as providing information on the rate of change of the phase angle, thanks to a simple and reliable circuit, has advantages compared to known devices. Its circuit allows the manufacture of a converter in the form of a large integrated circuit.

Claims (2)

The invention relates to an electronic technology - phaeometry and can be applied in devices and systems for various purposes, where it is necessary to monitor the phase angle in a wide range of angle variations. The known phase converter is a code containing input shapers, frequency dividers, a reversible counter, a control unit and logic elements 1. The lack of a converter is the inability to monitor the phase angle and obtain information about the rate of change of the phase angle, more complexity, reducing the reliability . A known phase converter is a code containing a driver, a trigger, AND elements, pulse generators, a counter, a crc comparison unit and a forming unit 2. The disadvantage of the converter is its small measuring range which does not exceed 360 °, and the reliability is low . The purpose of the invention is to expand the operating range and increase reliability. The purpose of the invention is achieved by the fact that a servo converter comprising a pulse generator, a frequency divider and a reversible counter, is equipped with a phase discriminator and a correction unit, the output of the pulse generator is connected to one of the phase discriminator inputs and the first input of the correction unit, the second and third inputs which are connected respectively to the first and second outputs of the phase discriminator, connected respectively to the first point and the second inputs of the reversible counter, the output of the correction unit through a divider frequency is connected to the second input of the FE of the discriminator. The correction unit is provided with an OR element, the first and second inputs of which are connected respectively to the W: 9th loop and the Delay line, the output is the output of the correction unit, and the first, second and third inputs are the first and second bars and the input, respectively. delay lines. The drawing shows a diagram of the transducer phase - code. The following phase converter - the code contains a generator of 1 pulses, a phase discriminator 2, a correction block 3, a frequency divider 4 and a reverse counter 5. A corrector includes the element OR 6, a delay line 7 and the blocking element 8, the converter works as follows. Generator 1 pulses through ele. Step 8 BAN and the OR element 6 of the correction unit 3 is fed to the 4 frequency divider. At the output of the divider, square-wave pulses are formed, the frequency of which is equal to the frequency of the voltage under study. The phase discriminator 2 with paraphase outputs converts the phase shift of the test voltage relative to the reference one in the corresponding 11–1 time intervals, one of which corresponds to positive and the other to negative angle of phase. As soon as the duration of the time interval becomes equal to or equal to 4 or more than the period of the generator pulse, a correction impulse appears on one of the outputs of the phase discriminator, depending on the sign of the shift angle of the gazhase. If a pulse appears at the positive output of the phase discriminator, then it arrives at the element 8 of the BANNER of the correction unit and prohibits the passage of a single pulse through it. As a result, the formation time of the reference voltage divider 4 frequencies increases by one pulse period of the generator 1 and the reference voltage tracks the test. When a pulse appears at the negative output of the phase discriminator, it is through the delay line 7 and the OR element b of the correction unit 3 is fed to the input of the divider 4. The time of the formation of the reference voltage by the frequency divider is reduced by the period of the generator pulses, and the reference voltage monitors the studied voltage. The up / down counter 5 sums the correction pulses according to their sign and forms the value of the phase angle. The range of variation of the phase angle is determined by the capacity of the reversible counter. The frequency of the corrective pulses is proportional to the rate of change of the phase angle. Phase converter - a code that provides shares tracking of the angle of shift in any direction and wide range, as well as providing information on the rate of change of the angle of phase shift, thanks to a simple and reliable scheme, has advantages over the known devices. Its circuit makes it possible to manufacture a converter in the form of a large integrated circuit. Claim 1. Phase-to-next converter is a code containing a pulse generator, a frequency divider and a reversible counter, characterized in that in order to expand {Working range and increase reliability, it is equipped with a phase discriminator and a correction unit, and the output of the pulse generator is connected with one of the inputs of the phase discriminator and the first input of the correction unit, the second and third inputs of which are connected respectively to the first and second output. phase discriminator connected respectively to the first and second inputs of the reversible counter, the output of the correction unit through the frequency divider is connected to the second input of the phase discriminator. 2. The converter according to claim 1, characterized in that the correction unit is equipped with an OR element, the first and second inputs of which are connected respectively to the BANNER element and the delay line, the output is the output of the correction unit, and the first, second and third inputs are respectively the first and second inputs of the BAN element and the input of the delay line. Sources of information taken into account in the examination 1.Gapakhova OP , Kolbin E.D. and Kravchenko S.A. Basics of phase metering. L., Energie, 1976, p. 156-163. 2.Certificate of the USSR 1 601287, cl. G 01 R 25/00, 1976. Vx (t}