SU1283967A1 - Method and apparatus for converting shift to digital code - Google Patents

Abstract

The invention relates to the field of automation and computing technology. And can be used in software systems for controlling machine tools, telescope control systems. The aim of the invention is to increase accuracy. The purpose of the invention is achieved by modulating the luminous flux according to several trapezoidal laws and one triangular, summing the modulated luminous fluxes, converting the total luminous flux into an electrical signal, the voltage of which is converted into a code. In order to implement these operations, the curve, which limits the active part of the coded element, is made varying with. in one step, its height increases in one half, decreases in the other half, and voltage-code converters are connected to the outputs of the sensitive elements. 2 sec. f-ly, 2 IL. i (L

Description

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The invention relates to automation and computer technology and can be used in software systems for controlling machine tools and telescope control systems.

The purpose of the image of the shadow is to increase the accuracy of the translation of the movement into the code.

Fig. 1 shows a block diagram of a device for converting movement into a code implementing the proposed method; 2 shows diagrams explaining the operation of the device.

The device for converting the movement into a code contains a quantized element 1 with a measuring track 2, main 3-6 and additional 7-14 diaphragm slits, a source of radiation 15, sensitive elements 16-19 and voltage-to-voltage converters 20-23.

The device works as follows (Raz.

When moving the quantized element 1 (from the extreme right position in the direction indicated by the arrow) relative to the main 3-6 and additional 7-14 aperture slits, the radiation of the radiation source 15, modulated by slits 3-14 of the diaphragm and measuring track with step W, falls sensitive elements 16-19, at the outputs of which electrical signals are generated. At the same time, at the outputs of the slits Zi7, 4H8s 5 and 9j 6 and 10 of the diaphragm, light fluxes are formed, modulated by trapezoidal laws (Fig.2a, 2§, respectively), having the same pitch, common axis of symmetry, but different duty rates.

At the exit of the slots 11-14 of the diaphragm, a luminous flux modulated according to a triangular law is formed (Fig. 2 B).

In a specific example, the modulation of the light flux is carried out according to trapezoidal and one triangle angle.

The modulated light fluxes (Figs. 2a, 8) fall on the sensitive elements 16-19, the output of the element 16 produces a signal U, a triangular shape (Fig. 22). Since the slits are 4,8,12,5,9,13,6 , 10.14 offset

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at the outputs of the sensing elements 17-19, triangular signals Ug are formed, and (fig. 23) 5 Ug (fig.2 g), shifted, also relative to each other by W / 4.

Signals and s are fed to the inputs of voltage converters 20–23 — a code, each of which can be performed according to any well-known principle, for example, weighted weighting, subsequent balancing, etc.

Claims (2)

Invention Formula one . A method of converting movement into a code based on the formation of two light streams displaced in space relative to each other along the transformed movement, the simultaneous modulation of these light streams, the subsequent formation of two electrical signals corresponding to the transformed movement, and their subsequent transformation into a code different the fact that, in order to improve the accuracy of the method, in it two luminous fluxes are displaced in space by an amount of 1, each luminous flux is modulated by triangular and trapezoidal p-law, each modulated light beam has a common symmetry axis .i step  modulations, where n is an integer the number, the electrical signals corresponding to the transposed displacement, are also proportional to the sum of the respective modulated light fluxes with voltage, proportional to the transposed displacement, and the voltage 2. A device for converting movement into a code containing a radiation source optically connected through the measuring track of the quantized element and the main slits of the diaphragm shifted relative to each other by the value of W (k + 1/4), where W is the track pitch and k integer, with sensitive elements, characterized in that, in order to improve the accuracy, the curve limiting the active part of the measuring path of the quantized W- (in-l) m element on the site length where m -. „any even number is more than two, is made stepwise increasing by a constant value, and in the subsequent segment the length W - (m-l) performed stepwise decreasing by the same constant value whereby the step change W is equal to -, in the diaphragm against each ; ™ sensor is complete W (- -1) additional slots, outputs Sensors are connected to the inputs of voltage converters — a code whose outputs are device inputs. H 1 1 9igg