SU1510085A1 - Angle-to-code converter - Google Patents

Abstract

The invention relates to automation and computing and can be used to enter angular information into a computer. The purpose of the invention is to simplify the converter. An converter containing a sine-cosine angle sensor 1, an octant selector 2, a 3 code converter, linear digital-to-analog multipliers 4, 5, an analog multiplier 6, an analog divider 7, a voltage divider 8, an operational amplifier 9, a demodulator 10, a converter 11 are entered voltage to frequency, reversible counter 12, bus 13 reference voltage. The choice of a specific algorithm for generating a mismatch signal eliminates the third analog-digital multiplier and thereby simplifies the angle-code converter with the division of the digital equivalent of the angle into two groups. 1 il.

Description

one

(21) 31 6i 0 / 2A-24

(22) 10/08/87

(46) 09/23/89. Bul N 35

(71) Moscow Forestry Institute

(72) V.G.Domrachev, V.A.Podoln and G.R.Bobrov

(53) 681.325 (088.8)

(56) Vulvet J. Sensors in digital systems. - M .: Energoizdat, 1981,

with. 189.

USSR Author's Certificate No. 1336242, cl. H 03 M 1/48.

(54) CORNER CONVERTER

(57) The invention relates to automation and computing technology and can be used to input angular information into a computational

the car. The purpose of the invention is to simplify the converter. In converter,. containing a sine-cosine angle sensor 1, selector 2. octant, converter 5 codes, linear digital-analog multipliers 4.5, introduced analog multiplier 6, analog divider 7, divider 8 for example. neither, operational amplifier 9, demodulator 10, voltage to frequency converter 11, reversible counting. pin 12, bus 13 reference voltage. The choice of a specific algorithm for generating a mismatch signal eliminates the third analog-to-digital multiplier and thereby simplifies the angle-code converter by dividing the digital equivalent of the angle into two groups. 1 il.

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ioOffz f K

SP

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31510085

The invention relates to apparatus. You need automation and computing technology and can be used to enter angular information into a computer.

The purpose of the invention is to simplify the converter.

The drawing shows the flow diagram of the converter .tO

The converter contains a sine-cosine angle sensor 1, an optant selector 2, a 3-code converter, linear digital-analog multiplications of the outputs of sensor 1, the signals sin0 and cos 9 are fed to the inputs of the selector 2 octant, the digital outputs of which form the code of the octant number, and the analog outputs - signals sin b and coab reduced to the first octant. At the output, a functional digital-to-analog converter consisting of a converter 3 of function codes tg av and a linear digital-analog converter 4, the product of soybean tgVi is formed. At the output of the analog multiplier 6,

telephones and 5, analog multiplier is XY / 10 function implementing, form 6, analog 1 divider 7, divide signal. At the output of the voltage line 8, operational amplification digital-analog multiplier

9, demodulator 10, transducer 5 is formed into a product.

11 voltages per frequency, reversing signals and 0 inputs 20

25

the counter 12, the bus 13 of the reference voltage.

The essence of the invention is to choose the structure of the converter that implements the algorithm for generating the error signal of the form

cos tgtf, - sin0 + --- 0 .. (1)

Condition (1) is equivalent to satisfying equality 30

, 4М 2 (2) in the range O - 9 fS. . After substitution (2), expression (1) takes the form

(cosCp, coscp - aintf ,. sintg) tgCf, - -sincp, cosqij - coaq), sinff +

The inputs of the analog divider 7, which implements the 10 X / Y function, at the output of which the summand is formed (100 cp / cosS, which in the voltage divider 8 is multiplied by a factor of 1/100. The sum of the formulas of the error signal generation algorithm go to the inputs of the amplifier 3, from the output of which the error signal is fed to the demodulator 10. From the output of the demodulator 10, the error signal is fed to the input of the voltage converter 11 to the frequency, where it is converted into a sequence of pulses of the required frequency. Reversible counter 12 ummiruet these pulses with a predetermined sign and generates at its outputs codes angles Q, and cfj bus 13 a reference voltage required for powering the sensor 40 and the demodulation error signal.

35

+ 0.

Cos o

(3)

Accept M g. 4 i and replace

Cp Sisintf-i; 1 s: cosCf, we get

(cosep, - Tsch sinCf,) tgtf, - aintf, - -Q cosq-, 0. (k)

Open the brackets and group the factors for CfJ into (k)

 0

 ABOUT

-. 5f h-

COSCp, COS 0

subject to, the expression becomes an identity.

The converter works as follows.

From the outputs of sensor 1, the signals sin0 and cos 9 arrive at the inputs of the selector 2 octant, the digital outputs of which form the code of the octant number, and the analog outputs the signals sin b and cob, converted to the first octant. At the output, a functional digital-to-analog converter consisting of a converter 3 of function codes tg av and a linear digital-analog converter 4, the product of soybean tgVi is formed. At the output of the analog multiplier 6,

XY / 10 function

The inputs of the analog divider 7, which implements the 10 X / Y function, at the output of which the summand is formed (100 cp / cosS, which in the voltage divider 8 is multiplied by a factor of 1/100. The sum of the formulas of the error signal generation algorithm go to the inputs of the amplifier 3, from the output of which the error signal is fed to the demodulator 10. From the output of the demodulator 10, the error signal is fed to the input of the voltage converter 11 to the frequency, where it is converted into a sequence of pulses of the required frequency. Reversible counter 12 ummiruet these pulses with a predetermined sign and generates at its outputs codes angles Q, and cfj bus 13 a reference voltage required for powering the sensor and the demodulation error signal.

Claims (1)

Invention Formula The angle-code converter containing a sine-cosine angle sensor, the outputs of which are connected to the inputs. octant selector, and the input is connected to the reference voltage bus, an operational amplifier whose output is connected to the first input of a demodulator, the second input of which is connected to the reference voltage bus, and the output connected to the input of a voltage to frequency converter, the first output of which is connected to the first input of the reversible counter, the code converter, the outputs of which are connected to the digital inputs of the first linear digital-to-analog multiplier, the output of which is connected to the first input of the operational amplifier, the second linear digital-analog multiplier, characterized in that, in order to simplify the converter, an analog converter, an analog divider and a voltage divider, the first analog output of the selector octant are connected to the second input of the operational amplifier, the second analog output of the octant selector is connected to the analog input of the first digital analogue of the second digital analogue multiplier - connected to the first and second inputs of the analog divider, respectively, the output of which is through a voltage divider ene with a third input of the operational amplifier, the second output voltage at the converter frequency is connected to the second input of the down counter, digital output selector octants are output MSB converts bodies outputs MSBs down counter connected to Ohodami multiplier, with the first and second input is the code converter, the outputs of the young remake input of the second multiplier, rectifier and the second digital-analog multiplier - connected to the first and second inputs of the analog divider, respectively, the output of which is connected to the third input of the operational amplifier through a voltage divider, the second output of the voltage to frequency converter is connected to the second input of the reversible counter, the digital outputs of the octant selector are the outputs of the senior converter bits, the outputs of the higher bits of the reversible counter are connected to Yohody The shifts of the reversible counter are connected to the digital inputs of the second linear digital-to-analog multiplier.