SU615503A1 - Optoelectronic device for computing tangential function - Google Patents

Description

(54) OPTOELECTRONIC DEVICE FOR CALCULATION OF TANGENCY DEPENDENCE

The invention of an ognoigs to analogue devices for calculating grigonemmetric functions and can be used in functional instruc-

A well-known calculation of the gangens dependency is based on the use of four quad blocks of the wound pus multiplication scheme. The input voltage of this circuit is the voltage of the functional sinus and cosine transducers. P1 to this, the output voltage of the circuit is proportional to the tangent or cotangent of the angle represented by the input mechanical magnitude of the trigonometric transducers L – J. The ratio circuit is an operational amplifier with a multiplication circuit included in the feedback circuit.

A disadvantage of this device is its low noise immunity and low accuracy of the formation of a tangent function.

It is also known a device comprising a reference voltage generator, an opcopencopav in, mirrors, light guides, a magnetic system with a conductive frame, an APSV modulator, and aaacho light flux, photodetectors, and variable current amplifiers.

The disadvantage of such a device is low work accuracy and design complexity.

The most technical solution to this data ("(the invention has an o0T1 electronic device for calculating the tangent dependence, containing a reference-voltage generator, one output connected to the LED, and the other output to the control inputs of synchronous detectors, which signal inputs through the corresponding photodetectors are connected to the outputs of the analyzer analyzers, which are optically coupled to the LED through a polar connected to the input of the device, and the scanning unit, the output connected to the first

0-V 1314-V 1t1nH GA rK TtPWHTiT 1 .H I.

The disadvantage of this device is the complexity of the optical part of the KOHCI guidance.

The circuit of the invention is to simplify the optical part of the device.

This goal is achieved by introducing two blocks of square root and an adder into the optoelectronic device for calculating the tangent dependence, the inputs of which are connected to the first outputs of the square root extractor blocks whose slots are connected to the inputs of the fuzz (subtraction, and the inputs are connected to 1xO) Dami coupled synchronous detectors, so that the output of the adder is connected to the second input of the output division unit.

The drawing shows a schematic diagram of a device which includes a voltage generator 1, an LED 2, a polar 3, polarizers-analyzers 4 and 5, photodetectors 6 and 7, synchronous detectors 8 and 9, square root extraction units 10 and 11, a subtraction unit 12, a calculator 13 and an output division unit 14.

The device works as follows.

The radiation flux from the LED 2 enters the polaroid 3, after passing which the signal represents the function

F (1) "FDOS oy S. OE (Coi t p) ,,

tne Fr - the maximum value of the stream;

rev is the angle whose function is numbered;

W is the frequency of the modulated radiation,

φ is the phase shift of the modulated radiation.

After poloid 3, the signal arrives. on analyzers 4.5, and then on photocells 6, 7. The voltage of the signal at the output of photodetectors 6, 7 is represented by the functions

lIj (t, oc) ((a) b (()

 2 bAco5 (o6 + o,) co f (bo1 + f) o the angle of the exhibition of the polarizers-analyzers 4, 5 relative to the angle of the exhibition CSU poloida 3,

A-Fo-6 - .. H .;

S area of the phototechnique;

2 - the transmission coefficient of the floor roid 3,

 - photodetector current sensitivity.

After demodulation at synchronous detectors 8.9, signals are sent to the blocks.

then to the subtraction unit 12 and the adder 13, and from the outputs of the subtraction unit 12 and the adder 13 to the output division unit, the output of which is the function

. -five,

and.

where 112, the signals after the outputs of the respective square root extraction blocks 10, 11.

The last expression can be converted to trigonometric form.

 You can set more zero and less than 90. Then the angle of the axis should vary within

-11 / 2- 0: 0 06 it / a-OS o1 Since the 14ach) function varies with the angle change angle, the output function changes little due to the inaccuracy of the installation of the polaroid, this determines the operation of the device. If we divide the sum by the difference, we get the function

.

An optoelectronic device for calculating the tangent dependence can be used to transform the angle of rotation into a trigonometric function, as well as as an initial information sensor in the following systems of automatic control of the angle of rotation.

Claims (3)

1. US Patent No. 3737639, cl. 235-186,1973. 2. Authors I USSR testimony No. 397872, Kn.Q 01Y 1/28, 1972. 3. Forward N9 2429790 / 18-24 dated December 13, 1976, cl. Q 06 Q 9/0, according to JKOTCV. swarm of a positive decision. Lg