SU1244793A1 - Staft turn angle-to-digital converter - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to connect analog information sources with a digital computing device. In order to expand the range of one. Significant conversion of the angle of rotation of the shaft to the code. The power supply source is connected to the primary winding of a rotating transformer (BT) and the inputs of the first null comparator, one terminals of the first and second secondary windings BT are connected to one of the first and second phase-shifting RC - chains, one pins of the capacitor C of the resistor R, respectively, of the first and second phase-shifting RC-chains and other pins of the first and second secondary windings of the VT are combined with each other, the average pins of the phase-shifting centers kidney are connected to inputs of the second zero-comparator outputs of the first and second zero-comparators connected to the input conversion unit time interval in the code. The BT output signals are phase shifted at the frequency w by ± 45 with respect to the phase of the power source and compared at the second null comparator, the output signal of which is shifted by an angle H proportional to the angle of rotation oC with respect to the signal of the power source. The phase of the output signal of the first zero comparator is constant and does not depend on the angle o h of rotation. The time interval between the output pulses of the first and second null comparators is converted into a code, for example, by filling this interval with pulses of an auxiliary generator, their subsequent counting in the time interval to code block. 1 il. F (L 4 CO DO

Description

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The invention relates to automation and computing and can be used to connect analog information sources with a digital computing device.

The purpose of the invention is to expand the range of unambiguous conversion of the angle of rotation of the shaft into a code.

The drawing shows a block diagram of the converter.

The shaft rotation angle converter contains the power source 1 connected to the primary winding of the rotating transformer 2 and the inputs of the null comparator 3, the first, L and the second 5 phase-shifting RC chains, each of which consists of a series-connected resistor R and a capacitor C, the middle pairs of phase-shifting chains 4 and 5 are connected to the inputs of the null compiler 6, the outputs of the null comparators 3 and 6 are connected to the inputs of the time interval 7 into the code unit, one output of the first and second secondary windings of the rotating tr The transformer is connected to other terminals of resistor R and capacitor C, respectively, of the first 4 and second 5 phase-shifting QC chains, and other terminals of capacitor C and resistor R, respectively, of the first 4 and second 5 phase-shifting RC chains and other outputs of the first and second secondary windings of a rotating transformer are combined between themselves.

The device works in the following way.,

The power source I produces a sinusoidal alternating current signal of frequency w, which the rotating transformer 2 modulates in amplitude as a function of the sine and cosine of the angle of rotation (. The output signals of the rotating transformer 2 are phase-shifted at a frequency (O at 145 relative to the phase frequency of source 1 and are compared on the null comparator 6. As a result, the output signal of the comparator 6 is shifted by an angle proportional to the angle of rotation l in relation to the signal of source 1. In the null comparator 3, the output signal of source 1 is equal to ivaets zero potential. Phase zero comparator output signal

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3 is constant and does not depend on the angle of rotation. The time interval between the output pulses of the null comparators 3 and 6, the proportional angle

5 4L of rotation, is converted in block 7 into a code, for example, by filling this interval with pulses of an auxiliary generator and their subsequent counting.

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When the reactance of chains 4 and 5 is changed by the same amount with respect to their active resistance, the output signals of chains 4 and 5 are shifted in phase by the same value in different directions, while the phase of the output signal of the zero comparator 6 is in relation to zero 2Q parator 3 is changed to the value of the second order of smallness.

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Formula inventions

2JJ Shaft angle converter: the code containing the power source connected to the primary winding of the rotating transformer, the first and second phase-shifting RC circuits, each of which consists of a series-connected resistor and a capacitor, connects a single point of the first resistor to one input of the first zero-comparator and - the capacitor of the first phase-shifting RC-chain, the output of the resistor of which is connected to one, the output of the first secondary winding of the rotary transformer, the second zero-comparator, the output of which you the first zero comparator stroke is connected to the inputs of the time interval conversion unit into a code, which is so that, in order to unambiguously convert the rotation angle of the shaft to the stroke, the connection point of the resistor is connected to another input of the first zero comparator and the condenser of the second phase-moving KS chain, the condenser-output terminal of which is connected to

 one output of the second secondary winding of the rotating transformer, the output; The power supply is connected to the inputs of the second zero-comparator, and the terminals of the first capacitor, the second phase shifter of RC phase chains and others of the first and second secondary circuits: the windings of the rotating transformer C are interconnected.

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Formula inventions

JJ Shaft Angle Converter: In the code containing the power source connected to the primary winding of a rotating transformer, the first and second phase-shifting RC circuits, each of which consists of a series-connected resistor and a capacitor, connect the junction point of the first resistor to one input of the first zero-comparator and - the capacitor of the first phase-shifting RC-chain, the output of the resistor of which is connected to one, the output of the first secondary winding of the rotary transformer, the second zero-comparator, the output of which you One of the first zero comparator is connected to the inputs of the time interval conversion unit into a code, which is so that, in order to resolve the one-to-one transformation range of the angle of rotation of the shaft to the stroke, the connection point of the resistor is connected to another input of the first zero comparator and the condenser of the second phase-moving KS chain, the condenser-output terminal of which is connected to

 one output of the second secondary winding of the rotating transformer, the output; the power source is connected to the inputs of the second zero-comparator, and the terminals of the first capacitor, the second phase shifter of RC phase-shifting circuits, and others of the first and second secondary circuits: the windings of the rotating transformer C are interconnected.

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Editor M.Tovtin

Compiled by A.Smirnov Tehred N. Bonkalo.

Order 3927/58 Circulation 816 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader O.Lugov

Claims (1)

Claim 25 Converter angle of rotation of the shaft; a code comprising a power source connected to the primary winding of the rotary transformer, the first and second phase-shifting RC-chain, _E 0, each of which consists of a series connected resistor and capacitor, to one input of a first zero-comparator. the connection point of the · resistor and · capacitor of the first phase-shifting RC circuit is connected, the output of the resistor of which is connected to one, the output of the first secondary winding of the rotating transformer, the second zero-comparator, the output of which and the output of the first zero-comparator are connected to the inputs of the time interval conversion unit into the code, which means that, in order to expand the range of unambiguous conversion of the angle of rotation of the shaft into a code, in it the connection point of the resistor and the condenser is connected to another input of the first zero-comparator ora vtoroy®fazosdvigayuschey RC-chain terminal of the capacitor ⁵⁰ which is connected to one terminal of the second rotary transformer secondary winding, a power supply outputs are connected to inputs of the second zero comparator and the terminals of the first capacitor, the second phase-shifting rezisto55 ra RS-chains and other findings the first and second secondary windings of a rotating transformer are interconnected.