SU674067A1 - Displacement- to-code converter - Google Patents

Description

(54) RABBRAEOVATEL P EREMEBNIY IN KOL

generating a software speed to voltage code and a summing amplifier, the output of the character selector unit is connected to the inputs of the first frequency conversion unit to the code whose other input is connected to the output of the discreteness selection unit, and the output through the actual speed to voltage code conversion unit is connected to to the first input of the summing amplifier, the output of the reversible counter is connected to the second input of the sum1-1Implifying amplifier through the conversion unit of the error-to-voltage code and via the code-to-op converter The orient voltage is connected to one of the inputs of the program-to-voltage code conversion unit, the inputs of the reversible counter and the second frequency conversion unit in the code are combined and connected to the input terminals 1, the output of the second frequency conversion unit in the code is connected to the other input of the code conversion unit program speed to voltage, the output of which is connected to the third input of the summing amplifier.

The drawing shows a flow chart of the displacement transducer to the code.

The converter contains a filter 1 (or any other driver of the information signal carrying signal), a digital analog converter 2, reversible readers 3, 4, a sensor 5, a dynamic program generator b, an amplifier 7, a discrete selection block 8, a disagreement analyzer 9, a distributor 10 , symbol selection unit 11, first frequency conversion unit to code 12, bpok conversion of actual speed code to voltage 13, error code conversion unit to voltage 14 second frequency conversion unit to code 15, unit reobrazovani commanded velocity voltage code 16, the code converting unit in the reference voltage 17 and the amplifier 18. otruyuyuy su ,, /.

The device works as follows. -. :,

The impulse signal of the distributor 10 is converted into a sinusoidal filter 1, which is not compressed by the information signal. In: digital-to-analog converter e 2, this voltage is modulated by a law of sine and cosine. The modulation angle is determined by the signal coming from counter 3, the state of which is set by the character selection blocks 11 and discreteness 8 depending on the sign of the signal from sensor 5 through amplifier 7 to the error accumulator 9. The error analyzer 9 determines the error signal sign. The signal from the analyzer misalignment 9 through the discrete selection blocks

8 and 11 is recorded in counter 3 and with the opposite sign in counter 4.

The error resolution of the error signal is selected according to the analysis result of the test program specified by the dynamic program generator 6. Counter 4 is the accumulator of the magnitude of the actual displacement or mismatch between the specified displacement value and the actual displacement. The specified displacement value can be specified as a unitary code with a sign of the weight (value) of discreteness or as an absolute code.

I The distributor 10 generates clocked pulses. The signal arriving on a digital converter converter 2 from filter 1 is converted into two modulations according to the sine and cosine voltage laws, the ratio of amplitudes of which is equal to the tangent of angle, the proportional value of the displacement of the movable part of the sensor relative to the fixed one.

The state of the digital-to-analog converter 2 is determined by the signals received from counter 3, which is recorded in a signal of such magnitude as to compensate for the error (US) caused by the actuator moving the moving part of sensor 5, this value is determined by the discrete selection unit 8, and the sign the signal is a selection block .11, The same signal, but with the opposite sign of the record, is sent to counter 4,.

The magnitude of the mismatch is analyzed as follows. The determination of the true value of the measured value is carried out by setting a dynamic test program, which has a variable discreteness, by comparing and logic analyzing the zero-crossing positive and negative increments of the compensation value.

The discreteness of the program is determined by the result of the analysis of the magnitude of the error: with increasing error the discreteness increases and vice versa. The operation of the error analyzer 9 and discrete selection block 8 is clocked by signals from the distributor 10.

Claims (1)

In order to control the drive (not shown), the digital signal from the sensor 4 by the error code conversion unit converts the voltage of the error control to voltage 14; which is fed to the second input of summing amplifier 13, to the first and third inputs of which are supplied with voltage control According to the power of the block for converting the actual speed code into voltage 13 and of the block for converting the code for program speed 6 and voltage 16. 5 Definition of the code equivalent of the actual speed displacement is performed by converting the frequency of pulsed error compensation signals, taking into account the magnitude of their discreteness by the frequency conversion unit to code 12, Control voltage Practical compensate movement speed control voltage commanded velocity and, therefore, is input to a summing amplifier with the opposite sign. Obtaining a control voltage in proportion to the programmed (for a given) speed value is produced using a 4ac conversion unit (unitary code) to code 15 and the next speed code conversion by block 16. Program speed can be set by setting a unitary code frequency with a weight sign (value) of discreteness or in the form of the absolute value of the speed code. When specifying the program cost in the form of the absolute value of the speed code / there is no need to use block 15, since The speed code can be fed directly to the input of the conversion unit 16. To reduce the dynamic no-resolution of the converter caused by the transient control npoueccaNm and the drive, the transmission ratio (program) of the software speed conversion unit 16 is measured, depending on the amount of mismatch generated in with a yutchik 4. The change of the gear ratio in the speed channel is possible due to the change in the reference voltage of the conversion unit 16. The change in the reference voltage of the drive A unit with a code conversion unit to a reference voltage 17, depending on the magnitude and sign of the error code. . With an error value of 1e equal to zero, the conversion unit 17 forms the nominal value of the reference voltage, a positive error leads to a decrease in the reference voltage and a decrease in the transmission coefficient of the conversion unit 16, which contributes to a faster processing of the error. Negative misalignment leads to an increase in the reference voltage and an increase in the transfer coefficient of the conversion unit 16, which leads to a faster processing of the error. A similar change in the transfer coefficient due to a change in the reference voltage is possible to produce and the conversion unit 13, Vvezhee additional blocks allows P1 b6 to add Additional 7 drive speed control, rto greatly expands the capability of the transducer, in addition, the use of receive blocks and transform blocks Vani actual values and varying the speed peremeieni transform coefficient control voltage rfo speed channel depending on the magnitude of mismatch, significantly increases the accuracy and reduces the conversion dynamic error transducer. The economic effect from the implementation of the proposed invention can be obtained by obtaining higher accuracy indicators under the contour control mode, which will give an opportunity to increase both the performance / quality of the control of the object and make economies of at least 400 rubles. on one device. The invention of the displacement transducer in the code on the author.St. No. 51974G, characterized in that, for the purpose of higher. neither the accuracy of the device nor the extension of its functionality, frequency conversion blocks into code, actual speed to voltage code conversions, code mismatch into voltage, code conversions and reference voltage, code speed in code converter are entered into the converter and a summing amplifier, the output of the sign selector unit is connected to one of the inputs of the first frequency conversion unit in the code, the other input of which is connected to the output discrete selection block, and the output through The actual speed to voltage code conversion unit is connected to the first input of the summing amplifier, the output of the reversible counter is connected to the second input of the software conversion unit through the code to voltage reference conversion unit through the second input of the summing amplifier speeds to voltage, the inputs of the reversible counter and the second frequency conversion unit in the code are combined and connected to the input, the output of the second conversion unit frequency code connected to another input nporpaNO Hod code rate conversion block in yapr lkonie, kotorogb output connected to a third input of amplifier miruyushegO ..-: -: --- h; ::: .- Information Sources, npHHetijte priekspertize into account. 1 a USSR Author's Certificate 519746, cl. G 08 C 9/00, 1974 & Js t l re Js " and 7J