SU1056217A1 - Device for transforming coordinates - Google Patents

Abstract

A COORDINATE CONVERTING DEVICE, containing a sine-sinus rotary transformer, the first and second outputs of which are connected. to switch to: vadrants, the control input of which is connected to the bus of the two most significant bits of the rotation angle code CHCTei i of the device coordinates, and the first output to the inverter input, as well as the first and second shapers of the orthogonal coordinate component, included in the first to the second channels, the input of the angular argument of each of which is connected to the bus of the code of the angle of rotation of the system of coordinates of the device, and that so that, in order to increase accuracy, the device contains in each of the two channels two multiplying rules code converter to voltage, summation and subtractive amplifiers, while the analog input of the first multiplying code-voltage converter is connected to the inverting input of a subtractor amplifier, the output of the first code multiplying converter. The voltage is connected to the first input of the summing amplifier, the second input of which is connected With the input input of the second multiplying code-to-voltage converter, the output of which is connected to the non-inverting input of a sub-amplifier, I multiply the digital inputs their code to voltage transducers are connected to the bus of the incremental code of the angle of rotation of the device’s coordinate system, the outputs of the total and subtracting amplifiers are connected to the coordinate inputs of the ortho driver (the global coordinate component of the corresponding channel, the first output of the quadrant switch is connected to the analog input of the second multiplier of the code converter to the voltage of the first channel, the second output of the quad switch is connected to the analog input e of the first multiplying transform When the code went to the voltage of the first channel and to the analog input of the second multiplying code converter to the voltage of the second channel, the output of the inverter is connected to the angular input of the first code multiplier to the voltage of the second channel.

Description

The invention relates to automation and computing and can be used in devices that allow the transformation of coordinates on a plane. Analog-to-digital coordinate transducers are widely used, in which coordinates specified in analog form are converted in accordance with angular values specified in digital form. A device for coordinate transformation is known based on the use of quadrature stresses whose amplitudes represent the original values of the rectangular coordinates. The total oscillation is used to obtain the instantaneous values at the instants of time determined. According to a given angle of rotation of the coordinates l . The drawback of the device lies in the presence of errors in the formation of harmonic stresses, errors in the conversion of the angle to the phase, and errors in the instantaneous demodulation. The closest in technical essence to the invention is a device containing a source of convertible rectangular coordinates (rotating transformer), the outputs of which through a switch are quadrant connected to the corresponding inputs of the coordinate drivers, the digital input of which is connected to your bus (their number is determined by the task of forming one or two coordinates on a plane). In the input circuit of one driver, there is an inverter 2J. A disadvantage of the known device lies in the insufficient languor of generating the coordinates. This is due to the fact that in a driver built on the principle of sequential (bitwise) conversion of the input signal in accordance with a given code, an increase in the number of conversion stages (size J is limited by the circuit errors, namely, the bias and drift of operational amplifiers. The purpose of the invention is to match accuracy. The goal is achieved by the fact that a device for converting coordinates that contains a blue. cosine transient transformer, the first and second outputs of which are connected to to the quadrant receiver, the control input of which is connected to the bus of two high-order bits of the rotation angle of the device’s coordinate system, and the first output is connected to the input of the inverter, and the first and second formers are, respectively, the first and second formers of the orthogonal component, the input the angular argument of each of which is connected to the device code angle of rotation angle of the CICTSNW coordinates, contains in each of the two channels. two multiplying transformers of 1 code to voltage, summations and subtractive amplifiers; the tax input of the first multiplying voltage-to-voltage converter is connected to the inverting input of the subtracting amplifier; the output of the first voltage-to-voltage multiplier is connected to the first input of the summing amplifier, the second input of which is connected to the analog input of the second voltage-multiplying code converter to the voltage whose output is connected to non-inverting input of the subtracting amplifier, digital inputs of the multiplying code-to-voltage converters are connected to the bus of the additional code of the angle This device's coordinate system, the outputs of the summed-down and subtractive amplifiers are connected to the coordinate inputs of the former orthogonal to the coordinates of the corresponding channel, the first output of the quadrant switches is connected to the analog input of the second multiplier of the code to the voltage of the first channel, the second output of the quadrants switch is connected to an analogue input of the first multiplying converter of the code to the voltage of the first channel and with the analog input of the second multiplying converter ate cola in voltage of the second channel, the inverter output is connected to an analog input of said first multiplying the code converter in the voltage of the second channel. The drawing shows a diagram of the device. The device contains a sine-cosine rotary transformer (CCTVT) 1, a switch of 2 quadrants, an inverter 3, multiplying code-to-voltage transducers 4 and 5, subtractive amplifiers b, summing amplifiers 7, shapers 8 and 9 of the angle code orthogonal rotation of the coordinate system, the bus 11 additional code angle of rotation of the coordinate system. The device works as follows. . The voltages from the outputs of the ACS 1 are fed to the inputs of the switch of 2 quadrants, the control input of which receives the code of the two most significant code points of the turn. Depending on the number of the quadrant, the signals at the outputs of the switch 2 .. correspond to the data in the table.

3

I Administrative Office

Output Voltage Signals

1: you.

YOU 2

ABOUT

Ui

UH

.1; -Ux

but

about

-Uv

-and

one

x

Consider the work of one of the channels (forming the coordinates).

Signals and Ujj COSOi are applied to the inputs of multiplying transform converters 4, 5f code. and and

and S i p sC.

The digital input of these transducers receives the additional code & c, which is used to refine the trigonometric transform.

Voltage produced at the outputs of amplifiers b and 7 | and, and and, & &, in,

  Uj + and, -ie.

enters the inputs forma l 8, which registers the dependency

C, sinfi + UTCOSQ. Considering that cosDv 1, sinAS lb, we have

, s "n (efb6) -U.jcos (e4t, 01.

Shaper 9 implements the dependency

U, .U cosG-Uj.ginG,

0 therefore at its output we have

and „-и, со5 () - и25 п {9 + д9). (2)

Considering that the signals are alarms U | and

5 and represent respectively the horizontal (cosine) and vertical (sine) components of the original coordinate system, we finally get

Ug (ot + 0 f A c),

0 U (ot + .0 1- d9).

The relative conversion error does not exceed the value of lb /

 2-8

For example, when & d

full angle

relative error does not exceed 0.03%.

The technical and economic effect of using the invention is determined by an increase in the accuracy of the Ili transform — with an accuracy equal to the accuracy of the known device by simplifying the formers.

ff | l

IfrflinUfif)

ifmOfUCflff /

Claims (1)

A COORDINATE CONVERSION DEVICE containing a sine-cosine rotary transformer, the first and second outputs of which are connected to a quadrant switch, the control input of which is connected to the bus of the two senior bits of the rotation angle code, the coordinate system of the device, and the first output to the inverter input, as well as those included in the first and the second channels, respectively, the first and second shapers of the orthogonal component of the coordinates, the input of the angular argument of each of which is connected to the bus code of the angle of rotation of the coordinate system Inat of the device, the reason is that, in order to improve accuracy, the device contains in each of the two channels two multiplying code-to-voltage converters, summing and subtracting amplifiers, while the analog input of the first multiplying code converter the voltage is connected to the inverting input of the subtracting amplifier ^, the output of the first multiplying code converter is connected to the first input of the summing amplifier, the second input of which is connected to the analog input of the second multiplying converter the code generator to voltage, the output of which is connected to the non-inverting input of the subtracting amplifier, the digital inputs of the multiplying code to voltage converters are connected to the bus of the additional code of the angle of rotation of the device, the output coordinate system of the summing and subtracting amplifiers are connected to the coordinate inputs of the generator of the orthogonal component of the coordinates of the corresponding channel , the first output of the quadrant switch is connected to the analog input of the second multiplying code to voltage converter first channel, the second output switch connected to the quadrant analog input first multiplying converter -code to a voltage of the first channel and a second multiplying an analog input code converter in the second channel power supply, the inverter output is connected to an analog input of said first multiplying the code-voltage converter of the second channel. >