SU1522402A1 - Shaft angle digitizer - Google Patents

Abstract

The invention relates to automation and computing and is intended to convert the angle of rotation of the shaft into a code. The aim of the invention is to increase the sensitivity and accuracy. To do this, a converter containing a pulse generator 1, a light source 2, a slit diaphragm 3, an electro-optical modulator 4, an input shaft 5, a mirror 6, a block of photodetectors, elements 10.1, 10.2, are entered into the converter of the angle of rotation of the shaft; counters 11.1, 11.2 and adder 12. A unit 7 of photodetectors, made in the form of two lines 7.1, 7.2 of devices with charge coupling connected in a differential circuit, allows to increase the conversion ratio of the angle of rotation of the shaft into a code. 3 il.

Description

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(21) 4343532724-24

(22) 12/14/87

(46) 11/15/89. Bul № 42 (72) G.V. Rassoha, G.V.Maevsky, V.F.Rybalchenko and A.A.Gritsenko, (53) 681.325 (088.8)

(56) Fundamentals of flight control of spacecraft and ships. M .: Mashinostroenie, 1977, p., 76, fig. 2.495.

USSR Author's Certificate No. 1053125, cl. -H 03 M 1/22, 1982.

(54) CONVERTER ANGLE OF TURNING .WEIGHT TO CODE

(57) The invention relates to automation and computing and is intended to convert an angle along, I-.1. . "V" "

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gate shaft in code. The aim of the invention is the twisting of sensitivity and accuracy. To do this, a converter containing a pulse generator 1, a light source 2, a slit diaphragm 3, an electro-optical modulator 4, an input shaft 5, a mirror 6, a block of photodetectors, elements 10.1-10.2, triggers 9.1, 9.2 are entered into the converter of the angle of rotation of the shaft, counters 41.1, 1 1 .2 and adder 12. Block 7 of photodetectors, made in the form of two lines 7.1, 7.2 of devices with charge coupling, connected in a differential circuit, allows to increase the coefficient of prev. The development of the angle of rotation of the shaft in the code. 3 il.

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The invention relates to automation and computing and is intended to convert the angle of rotation of the shaft into a code.

The purpose of the invention is to increase the sensitivity and accuracy of the transducer angle of rotation of the shaft into the code.

Figure 1 shows the block diagram of the converter; Figures 2, 3 show the coordinate photosensitive surface of the photodetector unit, made in the form of two differential circuits of devices with charge coupling, divided into elementary quanta, and the dynamics of the encoding time.

The shaft angle-to-turn converter contains a generator of G pulses, a light source 2, a slit diaphragm 3, an electro-optical modulator 4, an input axis 5, a mirror 6, a block of photodetectors made in the form of lines 7.1, 7.2 of instruments with charge coupling (CCD , block 8 processing, made in the form of triggers 9.1, 9.2, elements And 10.1, 10.2, counters 11.1, 11.2 and adder 12.

The Converter operates as follows.

The signals coming from the impulse generator 1 to the electro-optical modulator 4, which null the counter inputs 11.1 and and .2 pulses and single ones. the inputs of the flip-flops 9.1, 9.2 of the processing unit 8 with the frequency f, trigger the triggers 9.1, 9.2 into one, and the counters 11.1, P.2 into the zero state and modulate in time the light beam that passes from the source 2 to the mirror 6, fixed on the input axis 5, the slit diaphragm 3 turns into a narrow strip of light, which, depending on the angle of rotation of the input axis 5, hits the photosensitive surface of the photodetector unit 8 and injects charge packets in the metal layer of the 7.1, 7.2 lines. A single signal from the outputs of the flip-flops 9.1, 9.2 goes to the first inputs of the And 10.1, 10.2 elements, the second inputs of which simultaneously with the f / signal, from the pulse generator 1 start to receive signals of the frequency f-c, which through the elements And 10.1, 10.2 enter the counters 11.1, 11.2 The counting of the frequency pulses in the counters 11.2, 11.1, continues until the injected into the

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The 7.1 and 7.2 charges transferred by the clock frequency signals f, received from the second input of the pulse generator 1, will not reach the collectors of the corresponding lines 7.1, 7.2. The injected charge that has reached the output collector of the corresponding ruler 7.1, 7.2, is fed to the obnuzhny input of the corresponding trigger 9.1, 9.2 and transfers it to the zero state, thus closing the input of the corresponding counter 11.1, 11.2. The number of pulses f received at counters 11.1, 11.2 is thus proportional to the time taken to move the charge package from the injection point to the output collector. If, for example, sc ft, then the number of pulses arriving at counters 11., 11.2 is equal to the number of transfers of injected charges through one quantum of lines 7.i, 7.2. In the adder 12, the difference between the codes generated in the meters I.1, 11.2 is calculated and the sign of the output code is analyzed.

Claims (1)

Claims of the invention The converter of the angle of rotation of the shaft into a code containing a light source; optically connected through a series-installed slit diaphragm, an electro-optical modulator and a mirror with a block of photodetectors built on devices based on a charge-coupled link, the mirror is located on the input axis, the pulse generator, the first output of which is connected to the control input of the electro-optical modulator, the second output is with the control input of the photodetector unit, the third output is with the first inputs of the first and second elements. And, in order to increase the sensitivity and accuracy of the converter, two triggers, two counters and an adder were introduced into it, and devices with charge-coupling of photodetectors were made in the form of two lines, the control inputs of which combined and are the control input of the photodetector unit, devices with a charge connection of the first ruler are located on a straight line, and devices with a charge connection of the second line are located (on the sides of a square with an angle of 3, the top of the square is opposite to the middle of the first rulers, and with toro 5. I The angles are located at an angle oJ / (180 - (b) / 2 to the first ruler, the control input of the first ruler is located opposite the output of the second ruler, the outputs of the rulers of the photodetector unit are connected to the first inputs of the first and second triggers, respectively, the outputs of which are connected to the second inputs respectively per 224026 And the second and second elements, the outputs of which are connected to the counting inputs of the first and second counters, respectively, the outputs of which are connected to the inputs of the adder, the output of which is the output of the converter, the first output of the pulse generator is connected to the second inputs of the JO trigger and the zeroing inputs of the counters. 1 g L H 5 6 J 8 9 10 lid h 5 b 7 8 9 10 11 11 15 Fm.g m.5