SU1575311A1 - Digital displacement converter - Google Patents

Abstract

The invention relates to computing and information technology and can be used to build input devices for digital computers, digital measuring devices and process control systems as analog-digital converters of various physical quantities. The aim of the invention is to expand the field of application of the converter by increasing the number of simultaneously reproducible non-linear dependencies. The digital displacement transducer contains a source of radiation 1, a translucent screen 2, a fiber optic device 3 (VOU), a matrix of 4 photodetectors, a scanner unit 5, a pulse generator 8, a counter 6, the first register 10, a pulse distributor 7, a pulse former 9 pulses, N- 1 registers 10, where N is the number of simultaneously reproducible non-linear dependencies, and additional opaque lines are made on screen 2. The transformation of the image of a portion of screen 2 at the output end of HEA 3 into the corresponding number of electrical pulses at output 13 is performed by a matrix of 4 photodetectors and a scanning unit 5 in cycles that follow one after the other continuously. 3 il.

Description

Phage. one

The invention relates to computing and information technology and can be used to build information input devices in digital computers, digital measuring devices and process control systems as analog-digital converters of various physical quantities.

The aim of the invention is to expand the field of application of the motion digital converter by increasing the number of simultaneously reproducible non-linear dependencies. .

Fig. 1 shows a diagram of the proposed movement digital converter in Fig. 2, a diagram of a fiber optic device, Fig. 3 shows a diagram of a scanning unit with a matrix of photodetectors.

The digital displacement transducer contains a source of radiation 1, a translucent screen (plate) 2, a fiber-optic device (HEU) 3 of the row-frame type, a matrix of 4 photodetectors, a scanner unit 5, a counter 6, a distributor 7 pulses (counter-divider), a generator 8 pulses, shaper 9 pulses, registers 10, the number n of which is equal to the number of simultaneously reproducible non-linear dependencies, a group of electrical inputs 11 and outputs

12 matrices 4 photodetectors, output

13block 5 sweep, output 14 of the generator 8 pulses and the bus 15 of the installation to the initial state.

On the translucent screen 2 is applied opaque lines 16, forming the border 17 light - shade. A measurement is taken on side 18 of line 16.

The fiber-optical device 3 of the row-frame type is made in the form of a row of input ends 19 of optical fibers 20, forming at the output an output end of 21 frames made of output ends of 22 optical fibers 20.

The sweep unit 5 contains the distributors 23 and 24 pulses, the keys 25, the control inputs 26 of which are connected to the outputs of the distributor 23 pulses, and the output 27 of the senior bit of the distributor 23 pulses.

Convert the movements of the translucent screen 2 to y coordinates. (Fig. 2) extreme points of the boundaries of 17 sections illuminated by a luminous flux and darkened by opaque

Q

Q

with

five

0

lines of 16 parts of the HEU 3 input end (the edges of the light and dark sections of the screen of the sections of the light shadow formed by the projection of the screen 2 with non-intersecting and opaque lines 16 on the input end of HEU 3) are produced by the side of 18 lines 16. The lines 16 are parallel curves whose equations in the HOU coordinate system have the form:

W; A6f,; (x), mm

where d is the quantization step of the input

HEU end 3, mm

f; (x) - functions of the digital displacement converter; i 1.25 ..., Hz

p - the required (specified) number of simultaneously reproducible non-linear dependencies. For reliable operation of the displacement converter, the size of a lines 16 must be at least step U

about

quantizing the HEU 35 input end (in fact, the quantization step of the input HEU can be selected from the range of 0.005-0.5 mm).

The coordinates yt of the extreme points of the boundaries of the 17 light-shade sections and the overall image of the screen (plate) 2 at the input end of HEU 3 are quantized and transported by HEU 3 "made as a string-frame converter. The width of the input end of HEU 3 is much smaller than its length the width of the input end is selected from a range of 0.005-0.5 mm). The length of the input end of the HEA 3 is determined by the required accuracy of the displacement conversion and can be much larger than the range of this displacement. The input ends 19 of the light guides 20 forming the input end of the HEU 3. may have a rectangular shape or a circle shape and are laid normal to the direction of movement of the translucent screen 2 close to each other. The number of input ends 19 of the optical fibers 20, conventionally numbered from the first to the extreme darkened by the i-th line 16:

 G; (x) -Mh0),

where y is the ordinate of the first input end 19 of the fiber 20, mm; х „is the initial value of displacements, mm; f I (XD) - the initial values of the 1st function 51

transducer transducer.

The movement digitalizer operates as follows.

When the translucent screen (plate) 2 with n opaque and non-intersecting lines 16 is moved to the position corresponding to the x coordinate, the boundaries of the 17 light-shadow sections at the input end of HEU 3 occupy the positions corresponding to y4 V, (X), Ug Dv (x) , ..., yn bAЈЈ „(x). The image of screen 2 at the input end of HEU 3, including the light – shade sections and ordinates of their boundaries, is quantized and transformed. The HEB 3 into a discretely illuminated image of the specified area at its output end 21. This image is represented by luminous and non-luminous output ends of 22 fibers 20. The number of output ends of 22 fibers 20 from the first to non-luminous output ends N, f, (x) -f, (x0), Ne fa (x) - f, (x0), ..., Nh fn (x) -f1 (x0). These numbers N (, Mg, ..., Nn output ends 22 of the optical fibers 20 are converted continuously alternating cycles matrix 4 photodetectors and unit 5 sweep into numbers 1, 2, ..., n electrical signals at the output 13 of unit 5 by incrementally sweeping the image the screen section 2 at the output end 21 of HEU 3. This sweep unit 5 performs alternately connecting to the output 13 photodetectors of the matrix 4 according to the signals of the generator 8 arriving at the control input 14 of the unit 5 and the counting input of the counter 6. At the moments of occurrence 1 th, 2nd, ..., n-th signals at output 13 of block 5, corresponding to scanned images of opaque lines 16 at the output end 21 of HEU 3, the control input 14 and the counting input of counter 6 are received respectively by Nj, N, ..., Mi pulses from the output pulse generator 8. Counter 6 performs counting of the number of these pulses and addition of the counting results with the value code Ј4 (x0), which is the initial position of counter 6, i.e. at the instants of the 1st, 2nd, ..., ..., nth signals at output 13 of block 5, the outputs of the counter are stored for some values of Ј ((x), f2 (x), .. ,, fn (x). Counting the numbers 1, 2, ..., p of electrical signals at output 13 of block 5 and their

g 0 5 0 n Q,

five

eleven

the representation by a single positional code is performed by the distributor (counter-divider) 7. After the signals appear at the outputs of the distributor (counter-divider) 7, alternating to the control inputs n of the registers 10, these registers perform entering the codes of values f4 (х), Ј2 (x}, ..., f, (x) from the outputs of counter 6 and storing them. When a signal appears at the n-th output of the distributor (counter-divider) 7, the former 9 generates an electrical impulse that installs block 5 sweep as well as counter 6 and distributor 7 to its original position. At the same time, the outputs of the registers 10, which are outputs of the movement digital converter, store the function codes f 4 (x), f (x), ..., f "(x). Next, the operation of the digital movement converter is repeated is.

Thus, at each value x of the movement of the translucent screen (plate) 2 with n opaque and non-intersecting lines at the outputs of the digital motion converter at the end of the scan cycle, the image of the specified screen section is formed, and during the next scan cycle the codes for the encoded values of the conversion functions f , (x), ft (x), ..., H (x).

When using a two-coordinate array in photodetectors, the scanner unit 5 may have, for example, the circuit shown in FIG. The scanner unit 5, shown in FIG. 3, contains the distributors 23 and 24 pulses, as well as the keys 25. The horizontal buses 12 of the matrix 4 through the keys 25 form the output 13 of the scanner unit 5. The keys 25 are controlled by the distributor 23, the outputs 26 of which are connected to the control inputs of the keys 25. The shift of the unit in the distributor 23 from the low-order bits to the high-order ones is carried out by electrical signals of the pulse generator 8 supplied to the control input 14 of the unit 5 (distributor 23) . The unit shift in the distributor 24 is produced by signals arriving at its input 27 from the output bus of the senior bit of the distributor 23. A signal about the scan of the image of opaque lines to the output-r-d

phage. 2

Fi & W

Claims (1)

SUMMARY OF THE INVENTION A digital displacement transducer comprising a fiber optic device, the input end of which is optically coupled through a translucent screen, on which you. an opaque line of smooth functional dependence with the radiation source is filled, and the output end is optically connected to the array of photodetectors, the group of outputs of which is connected to the group of inputs of the scanner unit, the group of outputs of which is connected to the group of inputs of the array of photodetectors, a pulse generator whose output is connected to the control input of the scanner , a counter whose outputs are connected to the information inputs of the first register, characterized in that, in order to expand the scope of the converter due to increase in the number of simultaneously reproducible functional dependencies, a pulse distributor, a pulse shaper, n-1 registers are introduced into it, n-1 opaque and disjoint lines from the second to the n-th ed functional dependencies are made on a light-tight screen, where η is the number simultaneously reproduced functional dependences f „(x) of movement x, the output of the scanner is connected to the clock input of the pulse distributor, the outputs of which are connected to the control inputs of the corresponding registers, the input the pulse shaper is connected to the ηth output of the pulse distributor, and the output of the pulse shaper is connected to the installation inputs of the pulse distributor, sweep unit and counter, the counting input of which is connected to the 25 pulse generator, and the outputs are connected to the information inputs of the remaining registers, the outputs of all the registers are converter outputs. Phage 2 Figure 3