SU409268A1 - ANGLE CONVERTER - PHASE - CODE - Google Patents

Description

one

The invention relates to the field of automation and computer technology and can be used to input angular information in a digital computer.

Angle-phase-code transducers are known, containing induction bipolar and multi-pole phase shifters used in a rotating or pulsating magnetic field mode and used to linearly convert the rotation angle to an output voltage phase, a high-frequency crystal oscillator, the output of which is connected to a frequency divider producing low frequency pulses. The frequency divider is connected to the input of a sinusoidal voltage shaping unit, which forms two-phase voltage from the pulse signals, to the output of the sinusoidal voltage shaping unit - power amplifiers, and to the latter - an induction multi-pole phase shifter. A pulse shaper is connected to the output winding of the induction phase shifter, forming a short pulse and the moment of sinusoidal voltage transition through zero, to the pulse shaper - a control device, at which simultaneously low frequency pulses are transmitted from the frequency divider. The control unit is connected to an arithmetic unit, from the output of which a number proportional to the angle of rotation of the phase shifter arrives at the information consumer.

The known converter does not provide a high conversion accuracy. The accuracy of the angle-phase-code converter, when using two-pole induction phase shifters, is achieved with a single-counting conversion system of the order of 30 coal. min

The use of multipolar phase shifters with electrical reduction significantly reduces the error of the angle-phase-code conversion, since the Dfr transducer error determined by elements of the Afe converter (pulse generator, sinusoid generator, power amplifiers, etc.), Dfd resolution, interference with Afpom decreases in i times, where g is the induction electrical reduction factor

multipolar phase shifter

ATPR Asrf, + - + +.

However, even with the coefficient of electrical reduction of the phase shifter 1 64, it allowed us to reduce the error of the angle converter - phase - code to 5 coal. sec (without taking into account the error of Dpfv introduced by a polarized phase shifter), the total phase error Lfpr transducer with the best imp

samples of multipole phase shifters can not be obtained less than an angular minute.

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

This is achieved by the fact that a reducer and two passive correcting elements, each of which includes a regulating and correcting element, for example, an inductance, and a winding of an induction phase shifter connected in parallel to the input terminals of the impulse shaper and the output winding of the induction phase shifter are inserted into the device. In this case, the regulating element of the first correcting element is mechanically rigidly connected to the rotor of the phase shifter, and the regulating element of the second correcting element is connected with the rotor of the phase shifter through a kinematic transmission reduction gearbox with a gear ratio equal to the electric rotation coefficient of the phase shifter.

The parameters of the corrective links as a function of the angle of rotation of the rotor are phase shifted according to the law of change in the phase faults of the zero positions in the interval of 360 coal. hail, for the first corrective element and according to the law of change in the phase error of the phase shifter by in360

terval - email hail, for the second corrective element. Due to such electromechanical inclusion of passive correction elements together with a pulse shaper and an angle-phase-code-phase converter, the phase code of the output voltage of the induction phase shifter is exposed to the total effect of two correction elements, which increase the accuracy of the conversion by reducing the phase error introduced by the induction multipolar phase shifter.

FIG. Figure 1 shows the electrical block diagram of the angle-phase converter - code; in fig. 2 conventionally depicted the dependence of the phase error as a function of the angle of rotation of the rotor of the phase shifter.

The angle-phase converter — the code (Fig. 1) contains a Quardean generator 1; divider 2 frequencies; a sinusoidal wave shaping unit 3; 4 power amplifiers; induction phase shifter5 with excitation windings b and output 7 located on the rotor 8; pulse shaper 9; control device 10; arithmetic unit 11; passive corrective elements 12 and 13, including regulating links 14 and 15, corrective links 16 and 17, such as inductance; boost gear 18.

The control link 14 is mechanically rigidly connected to the rotor 8 of the phase shifter 5. The control link 15 of the correcting element 13 is connected to the rotor of the phase shifter via a step-up gearbox with a gear ratio equal to the z-coefficient of electrical reduction of the induction phase shifter. Converter angle - phase code works as follows.

From the crystal oscillator 1, high frequency pulses are applied to frequency divider 2. From the frequency divider, low-frequency pulses are simultaneously passed to the control device 10 and the sinusoidal voltage shaping unit 3. The excitation windings 6 of the phase shifter 5 are powered by power amplifiers 4, which amplify the voltage of the lithium from the sinusoidal voltage shaping unit. From the output winding 7 of the induction phase shifter, the voltage with a phase shift arrives at the pulse shaper 9, which forms a short pulse at the time of the transition of the sinusoidal wave, removed from the output winding 7 of the induction phase shifter, through a zero value. From the pulse former, pulses are fed to the device 10, which controls the arithmetic unit 11. From the arithmetic unit, a number proportional to the rotation angle of the rotor 7 of the phase shifter goes to the information consumer.

The change in the phase error of an induction multipolar phase shifter in

functions of the angle of rotation of the rotor, depending on the individual qualities of the phase shifter has a certain character. On the interval

in - ang. for any of the elementary phase rotators, the phase error Afg is the same and is determined by the electromagnetic symmetry of the windings, the content of higher harmonics in the mutual inductance curve, etc. Thus, in form and magnitude, the phase error AF is the same for any of the i intervals.

Phase error Affv multipolar induction phase shifter on the interval in

7 coal hail, determines the sum of the phase error of any of the i intervals (af,) and the phase error of the so-called zero positions (afg), determined by the inaccuracy of manufacturing the magnetic circuits of the phase shifter: eccentricity, magnetic strike, etc.

Thus (see fig. 2).

  I ± I + I ± I

Element 12 corrects the phase error of the zero positions on the full rotation of the phase shifter, equal to 360 coal. deg., element 13 - phase error correction for one of the f-x intervals equal to

Y e. hail. Phase faults are corrected by applying calibrated corrective links 16 and 17, for example inductances, the law of which is calibrated by the following conditions:

± / - T,

Kor

± D (r, Gr.

Kor

D - -P / core foKop are the phase errors introduced by the corrective elements for the i-th interval and for zero-positions, respectively.

The phase change of the output voltage supplied to the pulse shaper 9, formed by artificially introducing phase error correction elements 12 (- -Rokor) 3 (fiKop) is determined by changing the ratio of inductive and active resistances of the induction phase shifter, pulse shaper and correction elements 12 and 13.

When using an induction multipolar phase shifter of the type IMM-1 KAZ 185001 s, having the following. Parameters:

2in 17 + y-48, Z, ", 40 + y155,

 I ± + I ± D9,1 ± 40 I + I ± 20 I

 60 coal seconds

with the input impedance of the pulse former, 1 com after correction of the phase error AF; and Dfo, the total phase error of the angle-phase converter — the code is ± 20-25 coal. seconds Correction is carried out with inductive correctors, in which the inductance value of the corrective element varies: after calibration for the first corrective element within L f (its) 150 ± 20 milligenres, for the second corrective element

(-) 120 ± 30 milligenres. Passive V i J

the corrective elements are inductors with a U-shaped permalloy magnetic circuit; the inductance is tared according to the law of change

phase error Lf, and the Afo phase shifter by changing the air gap between the inductor and the permalloy lasers of the regulating element core. The number of plates located around the circumference

axis connected to the induction phase shifter, reaches 48 pcs. The inductance or capacitance can also be used as passive corrective elements, the values of which are calibrated according to the law of change in the phase error of the phase shifter.

Subject invention

Angle-phase converter is a code containing a series-connected crystal oscillator, a frequency divider, a sinusoidal voltage shaping unit, power amplifiers, an induction multipolar phase shifter, a pulse shaper, a control device, and an arithmetic unit, the output of a frequency divider that is different to the second input of the control unit. the fact that, in order to improve the accuracy of the device, the gearbox and the connected to the output winding of the induction phase shifter ssivnye corrective elements, each of which comprises a regulating and corrective units, wherein the unit reguliruyushee lervogo passive correction element rigidly associated with the rotor phase shifter, and a regulating unit correcting the second passive element is coupled to the rotor through a gearbox with a phase shifter

gear ratio equal to the coefficient of electrical reduction of the phase shifter.

9b

Sgl