SU1374428A1 - Displacement-to-code converter - Google Patents

Abstract

The invention relates to automation and computing and can be used to connect analog information sources with a digital computing device. In order to improve noise immunity by forming a single-variable reflected code in the displacement transducer into the code containing phase shifter 1, coding blocks 2, switches 3, and each of the coding blocks 2 consists of phase splitter 4, block 5 of the comparators and decoder 6, into each encoding block 2, In addition to the first and the last, additional phase splitters 7 are introduced. By successively decreasing the quantum and determining the number of this quantum in each of the coding blocks 2, the code for moving the phase shifter is determined. 1, By alternating the signs of the gradients of the input signals of the phase splitter 4, each time the previous commutator switch 3 is switched, the single variable variable code for the quantum limited by the input signals of the phase splitters 4 and 7 is formed at the outputs of the decoder 6. (С С /)

Description

T

2

four

WITH

NPk

;; ao

00

to

W.

lgl

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

The purpose of the invention is to improve the noise immunity of the converter by forming a single-one reflected code.

The drawing presents the converter circuit diagram.

The Converter contains the phase shifter 1, the coding blocks 2, the switches 3. The coding blocks 2 contain the phase splitter 4, the comparators block 5, the decoder 6 and the additional phase splitter 7.

The Converter operates as follows.

Phaser 1 produces, as a function of movement, four sinusoidal signals shifted in phase relative to each other by 90 °. The phase shift of these signals within 360 ° is proportional to the movement of the phase shifter.

The phase splitter 4 forms a gophasic system of sinusoidal signals, which arrive at one input of the corresponding comparators of block 5. The other inputs of these comparators are connected to a common bus. At the outputs of block 5, a combination of zero and single signals is produced depending on the zero of the ACS 1 shaft. At the outputs of the decoder 6 of the first coding unit 2, higher bits of the single-variable output code of the converter are generated. Through switch 3 to the inputs of the phase splitters 4 and 7 of the next coding unit 2, four boundary (limiting quantum) voltages are passed from the outputs of the preceding phase splitter, between which the actual value of the phase corresponding to the phase position; In this case, the first two boundary voltages with a gradient of one sign are fed to the phase splitter 4, and two boundary voltages with a gradient of the other sign (inverse first) are fed to the phase splitter 7. The signs of the gradients of the boundary voltages change to opposite when crossing the boundary between adjacent quanta . The phase splitters 4 and 7 of the next coding unit 2 are generated

0

five

0

25

thirty

P

35

40

45

55

multiphase voltage systems (inverse to each other) with even smaller quanta. The number of a smaller quantum, inside which the actual phase value is contained, is generated in the decoder 6 of the next coding block 2, the output code of which is the code of the next bits of the output code. Four boundary voltages for a smaller quantum pass through the next switch 3. These boundary voltages are similarly processed in the following coding block 2, and so on.

As a result, by successively reducing the quantum in which the actual phase value is contained, and determining the number of this quantum in each of the successively connected coding blocks 2, the code for moving the phase shifter 1 is determined. By alternating the signs of the gradients of the input signals of the phase splitter 4 each time the previous switch is switched 3, at the outputs of the decoder 6, a single-variable reflected code is formed within the quantum limited by the input signals of the phase splitters 4 and. 7. The number of this quantum is determined by the code of the decoders .6 of the previous coding blocks 2. In such a converter, the code changes always in only one bit, which increases the noise immunity of the converter.

invention formula

A displacement transducer into a code containing a phase shifter, (P-1) switches and P coding blocks, of which contains a serially connected phase splitter, a comparators block and a decoder, the information and control inputs of each switch are connected to the outputs of the previous splitter and decoder of the previous coding block, respectively Two direct outputs of each switch are connected to the inputs of the phase splitter of the subsequent coding unit, the outputs of the phase shifter are connected to the inputs of the phase splitter of the first coding The outputs of the decoders of each coding block are body transforming outputs characterized in that.

31374428

that, in order to increase the noise immunity to the two additional inverters of the converter, in each outputs of the previous switch, the coding block, except the first and the outputs are connected to the additional ones and the last, introduced additional information inputs of the subsequent phase splitter, whose inputs - switch.

Claims (1)

The claims of the converter output code. Through the switch 3 to the inputs of the phase splitters. 4 and 7 of the next coding unit 2 pass four boundary (limiting quanta) voltages from the outputs of the previous phase splitter, between which the actual phase value corresponding to the position of phase shifter 1 is enclosed. In this case, the first two boundary voltages with a gradient of the same sign arrive at phase splitter 4, and two boundary stresses with a gradient of a different sign (inverse first) are fed to the phase splitter 7. The signs of the gradients of the boundary stresses are reversed when passing through the boundary between the neighbor by quanta. On the phase splitters 4 and 7 of the next coding unit 2 are generated The displacement converter into a code containing a phase shifter, (P-1) switches and P coding blocks, each of which contains a phase splitter, a comparator block and a decoder connected in series, information and control inputs of each switch are connected to the outputs of the phase splitter and decoder of the previous coding block, respectively, and two direct outputs of each switch are connected to the inputs of the phase splitter of the subsequent coding unit, the outputs of the phase shifter are connected to the inputs of the phase splitter of the first code unit, and the outputs of the decoders of each encoding unit are the outputs of the converter, characterized in that, in order to increase the noise immunity of the converter, an additional phase splitter is inserted in each of the coding blocks, in addition to the first and last, the inputs of which are connected to two additional inverse outputs the previous switch, and the outputs are connected to additional information inputs of the subsequent switch.