SU1485404A1 - Angle-to-code converter - Google Patents

Description

The invention relates to devices for automation and computing and can be used to enter the angular information into a computer. The aim of the invention is to simplify the converter due to the use of the algorithm for the formation of the error signal, which allows to exclude from the converter the second Functional D / A converter. This goal is achieved by the fact that the converter containing sine-cosine angle sensor 1, octant detection unit 2, functional digital-to-analog converter 4, reversible counter 6, voltage-frequency converter ’7, demodulator 8, introduced an analog multiplier 3 and voltage divider 5. The introduction of the analog multiplier 3 and the voltage divider 5 makes it possible to generate at the output of the analog multiplier 3 a mismatch signal of the form δΐη cosb - δΐηθ · · cos соз =

= 0 for 0 ^ θ έ45 °, which eliminates the second functional digital-to-analog converter and thereby simplifies the angle-code converter circuit. 1 il.

1485404 A

3

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The invention relates to devices for automation and computing and can be used to enter the angular information into a computer.

The aim of the invention is to simplify the Converter due to the choice of the algorithm for the formation of the error signal, allowing to exclude from the Converter the second functional digital-to-analog Converter.

The drawing shows a structural diagram of the Converter.

The converter contains a sine-sinus-sine angle sensor 1, an octant definition unit 2, an analog trans ¹ · * 'multiplier 3, a functional digital-to-analog converter 4, a voltage divider 5, a reversing counter 6, a converter 7 voltage frequency, a demodulator 8.

The Converter operates as follows.

The principle of operation of the converter is based on the algorithm of forming the mismatch signal of the form

8ίηθ · cos Θ - δίη Θ cos 6 = 0.

The analogue signals βΐη Θ and comb from the outputs of the sine-cosine angle sensor 1 are fed to the inputs of the octant determination unit 2. As a result of comparing the input signal levels with zero and between themselves, three high-order digits of the converter's output code (octant code) are formed on the digital outputs of the octant definition unit 2, and the 3ΪηΘ and soθ signals, reduced to the first octant, on the analog outputs. Three-input analog multiplier 3 (as analog multiplier 3, m / s 525 PSZ can be used) with inputs X,, Ζ realizes your own

course function = Ζ - γθ. From the outputs of the octant definition unit 2, the inputs X and Υ of the analog multiplier 3 receive signals proportional to είπθ and созΘ, respectively. The signal also goes to the analog input of the functional digital-to-analog converter 4, to the digital inputs of which

the angle code cp from the reversible counter 6. From the output of the functional digital-analog converter 4, the product of the cos θ · 5Ϊηψ through the voltage divider 5 is fed to the input Ζ of the analog multiplier 3. In accordance with the function performed by the analog multiplier 3, the following error is generated at its output

ΧΥ 1

² - those "those""H' ^x

x cos 0 - βΐηθ · cos Θ),

Coefficient of proportionality

one

- γθ is compensated by amplifying the signal at the output of the demodulator 8, connected via a voltage-frequency converter 7 to the inputs of the reversing counter 6.

Claims (1)

Claim Angle converter - a code containing a sine-cosine angle sensor, the outputs of which are connected to the inputs of the octant detection unit, the first analog output of which is connected to the first input of a functional digital-to-analog converter, digital inputs of which are connected to the outputs of the digits of the reversible counter, the reference voltage source, the output of which connected to the input of sine-cosine angle sensor and to the first input of the demodulator, the output of which is connected to the input of inverter voltage - frequency, the first and second you ^g the strokes of which are connected to the addition and subtraction inputs of a reversible counter, respectively, characterized in that, to simplify, a voltage divider and an analog multiplier are entered, the first and second inputs of which are connected to the second and first outputs of the octant definition unit, respectively, and the third input is connected to the output of the voltage divider, the input of which is connected to the output of the functional digital-to-analog converter, the output of the analog multiplier is connected to the second input of the demodulator.