SU1290524A1 - Shaft turn angle-to-time interval converter - Google Patents

Abstract

The invention relates to the field of automation and computing and can be used to connect analog information sources with a digital computing device. In order to expand the range of operation, an amplifier-suppressor, a key, a first integrator, a frequency divider, a second integrator, a comparator, a trigger, and an initial conditions bus are introduced into the converter containing the pulse generator, three-phase voltage driver, phase shifter and filter. At the output of the filter, a harmonic signal is produced, which is phase-shifted relative to the signals of the three-phase voltage driver to an angle proportional to the angular position of the shaft of the phase shifter. During transients at the beginning of the converter operation, the temporal position of the output pulse of the comparator is shifted in phase within the period of the sustaining voltage until the cutoff of the output pulse of the amplifier-limiter corresponds to the middle of the output pulse of the comparator. Subsequently, the output pulse of the comparator is shifted in phase, tracking the phase shift of the output signals of the filter and the limiter when the angle noj of the gate of the phase shifter changes within a few pole divisions. A time interval is formed at the output of the trigger. 1 il. with S WITH

Description

The invention relates to automation and computing and can be used to connect analog information sources with a digital computing device.

The purpose of the invention is to expand the range of operation of the converter to several revolutions of the shaft.

The drawing shows a block diagram of the converter.

The converter contains generator 1, three-phase voltage driver 2, phase shifter 3, filter 4, amplifier-limiter 5, Key 6, first integrator 7, frequency divider 8, second integrator 9, comparator 10, trigger 11 and initial bus 12.

The Converter operates as follows.

The shaper 2 generates square-wave square-wave pulses from the pulses of the phase 1 relative to each other by 120 .. At the output of the phase shifter 3, a signal is generated that is shifted in the main harmonic phase by an angle proportional to the angle of rotation of the phase shifter inside the pole division. Filter 4 extracts the main harmonic signal, from which the limiting amplifier produces positive and negative polarity pulses in accordance with the sign of the harmonic signal at the output of filter 4. The division factor of divider 8 is set equal to the number of periods of time interval change. during the measurement cycle. The bus 12 of the initial conditions of the integrator 7 induces a voltage corresponding to a change in the voltage of the integrator 7 at its information input in the range of movement of the shaft of the phase shifter 3 by half the pole division.

By the output pulse of the divider 8, the trigger 11 is set to one state. The voltage at the output of the integrator 9 begins to increase. At the moment of equality of the output voltages of the integrators 7 and 9, a pulse of a certain duration is generated at the output of the comparator 10, which sets the trigger 11 to O and closes the key 6. The output voltage of the amplifier-limiter 5 during the effects of this impulse:

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five

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integrator 7 and changes its output voltage by the value of iSruU, depending on the polarity of the output voltage of amplifier-limiter 5. When the next output pulse of divider 8 arrives, the process repeats. At the output of the trigger 11, a pulse is formed, the duration of which at a constant angle of rotation of the phase shifter 3 increases or decreases until the cut of the output pulse of the amplifier-limiter 5 corresponds to the middle of the output pulse of the comparator 10. At this, the transient process associated with its inclusion ends. The duration of the output pulse of the trigger 11 is set proportional to the initial position of the shaft of the phase shifter 3. When the angular position of the shaft of the phase rotator 3 is changed, the output pulse of the amplifier-limiter 5 is shifted relative to the center of the output pulse of the comparator 10, which leads to a change in the output signal of the integrator 7 relative to the set value In comparator 10 shifts in time the moment of equality of the input voltages. The duration of the output pulse of the trigger 11 changes to a stable equilibrium position between the temporal position of the composite pulse 10 and the output pulse of the amplifier-limiting 5. As a result, the duration of the output pulses of the trigger 11 is proportional to the angular position of the shaft of the phase shifter 3 when it moves within several pole divisions set by the divider 8 frequency.

Claims (1)

Invention Formula A shaft rotation angle converter in a time interval containing a series-connected generator, a three-phase voltage driver, a phase shifter and a filter, characterized in that, in order to expand the converter's range, a frequency divider, a trigger, a limiting amplifier, a comparator, the first and second integrators and a key, the output of the filter through the limiting amplifier is connected to the information input of the key whose output is connected to the first the input of the first integrator, whose second input is connected to the initial conditions bus, and the output is connected to one input of the comparator, one of the outputs of the three-phase voltage driver is connected via a frequency divider to the C input of the trigger, the D input Editor L. Pcholinska Compiled by A. Smirnov Tehred-I.Popovich Proofreader E.Sirohman 7916/57 Tyr; : 922 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5 Production and printing company, Uzhgorod, st. Design, And which is connected to the unit potential bus, and the output is connected to the input of the second integrator, the output of the second integrator is connected to another input of the comparator, the output of which is connected to the R input of the trigger and the control input of the switch. "