SU1437999A1 - Photoelectric displacement digitizer - Google Patents

Abstract

The invention relates to measurement technology, to devices of discrete information about movements, and can be used in precision instrument making. The aim of the invention is to simplify the photoelectric converter of the movement in the f code. The goal is achieved by the fact that in a photoelectric converter of movements into a code containing a source of radiation 1, a measurement 2 and a display 3 rasters, a block of 4 photodetectors, a shaper of signals 5, a converter of 6 codes and a reversible counter 7, the converter of 6 codes is complete on two pairs - channel multiplexers 8 and two delay elements 9. Connecting the multiplexers 8 to the outputs of the formatting of the 5 signals allows to obtain at the output of the multiplexers 8 a sequence of pulses when the measuring raster 2 is moved in one direction or the other. The delay elements 9 ensure reliable operation of the converter 6 codes, regardless of the used multiplexers 8, 2 Il. (L with S 4 with -N1 CD WITH with

Description

The invention relates to a measuring technique, to devices of discrete information about movements, and can be used with precise instrument making.

The aim of the invention is to simplify the photoelectric displacement transducer into a code.

Fig. 1 shows a functional diagram of the proposed photoelectric displacement transducer into a code; figure 2 - timing diagrams of the operation of the Converter codes.

The photoelectric transducer to code (Fig. 1) contains a radiation source 1, a measuring raster 2, an indicator raster 3, a block of 4 photodetectors, a signal conditioner 5, a code converter 6, a reversible counter 7. The code converter 6 contains multiplexers 8 and delay elements 9. .

The photoelectric transducer to the code works as follows.

The radiation from the source 1, the passage through the movable measuring 2 (angular or linear) and the fixed indicator 3 rasters, is fed to the block 4 photodetectors, two sinusoidal signals from the outputs of the pair of photosensitive elements.

shifted in phase by, come in 35

in shapers 5, which are sequentially connected Schmitt trigger and potential inverter. From the outputs of the formers 5, four sequences of signals (two direct and two inverse, FIG. 2 a, b, c, d) are fed to the inputs of the 6-code converter. Connecting the inputs of multiplexers 8 included in converter codes 6, shown in FIG. 1, provides the output of the sequence + (FIG. 2d} and the sequence - (FIG. 2e). The multiplexers 8 can be made dual in one package with a common management.,

The sequence + goes to the summing input of the reversible counter 7 when moving the measuring raster 2 in one direction, and - - to subtract the input of the reversible counter 7 when moving the measuring

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raster 2 to the other side. The delay elements 9 provide reliable operation of the converter 6 codes.

Claims (1)

Invention Formula A photoelectric converter for moving into a code containing a radiation source optically coupled through successive measuring and indicator rasters with a block of photodetectors, the outputs of which are connected to the inputs of the first and second signal conditioners, the direct and inverse outputs of the first signal conditioner are connected to the first and second inputs of the converter codes, direct and inverse outputs of the second signal conditioner are connected to the third and fourth inputs of the code converter, the outputs of which connected to the summing and subtracting inputs of a reversible counter, distinguishing from, in order to simplify the converter, the code converter in it is made in the form of two multiplexers containing the firstJ the second, third and fourth information inputs and the first and second address inputs, and two delay elements, the input of the first element the delay is connected to the first information input of the first multiplexer, to the third information input of the second multiplexer, and is the first input of the code converter; the input of the second delay element is connected to the second information input. The first multiplexer, with the first information input of the second multiplexer, is the third input of the code converter, the fourth inlet is the formation input of the multiplexer. the second multiplexer and is the fourth input of the code converter; the outputs of the first and second delay elements are connected respectively to the first and the second address inputs of both multiplexers, the outputs of which are the outputs of the code converter. a a  6 In a S b ff. Fi.T.