SU1425833A1 - Angle encoder - Google Patents

Description

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The invention relates to the field of automation and computing.

The aim of the invention is to improve the accuracy of the transducer by increasing the measurement frequency.

The drawing shows a block diagram of the angle-code converter.

The converter contains a generator of 1 pulses, a counter 2, a shaper 3 .. three-phase signals, a block of 4 filters, a phase shifter 5, a threshold element 6, a shaper of 7 pulses a converter of 8 codes, a block of 9 elements, and a register 10, digital-analog a converter 11, a subtractor 12, a block of 13 elements AND and a register 14,

The Converter operates as follows.

The generator 1 continuously fills the meter 2. The code from the counter 2 is fed to the shaper 3 of three-phase signals, supplying a three-phase phase shifter 5 through sine-voltage at the filter 4.

The output voltage of the three-phase phase shifter 5 is phase shifted relative to the primary voltage by an amount proportional to the displacement.

The converter 8 codes in accordance with the counter code 2 generates the code of the trigonometric function.

The threshold element 6 compares the three-phase output voltage of the phase shifter 5 with the output voltage. Ie digital-to-analog converter 11. The value of the output voltage of the digital-analog converter 11 depends on the code written in register 10, and the maximum value of this voltage is equal to the amplitude Zio of the output voltage of the phase shifter 5.

At the moment of equality of the voltages arriving at the input of the threshold element 6, a signal is generated at its output, which through the pulse shaper 7 allows the transfer of the difference between the current counter code 2 and the code recorded in register 1.0 from the output, subtraction unit 12 through block 13 register 14. At the same time, the current counter code 2 is transferred to register 10 through a code converter 8. The output voltage of the D / A converter becomes equal to the value of one of the primary voltages of the three-phase phase shifter 5 at the moment of writing the code in registers 9 and 14, i.e. at the time of the previous comparison of the voltage from the output of the phase shifter 5 with the next threshold voltage with the DAC 11.

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Claims (1)

ANGLE CONVERTER - CODE containing a pulse generator, the output of which is connected to the counter input and the first input of the pulse shaper, the counter outputs are connected to the inputs of the three-phase signal shaper, the outputs of which are connected through the filter block to the inputs of the phase shifter, the output of which is connected to one input of the threshold element the output of which is connected to the second input of the pulse shaper, the output of which is connected to the control inputs of the first block of AND elements, the outputs of which are connected to the inputs of the first register And, on the other hand, in order to increase the accuracy of the converter, a code converter, a second block of AND elements, a subtraction block and a digital-to-analog converter, counter outputs are connected through the code converter to the information inputs of the second block And elements, the outputs of which are through the second; the register is connected to the inputs of the digital-to-analog converter and to the first group of inputs of the subtraction unit, the output is connected to another input of the threshold element, the outputs of the counter are connected to the second group of inputs of the subtraction unit, the output of the pulse shaper is connected to the control inputs of the second * block of elements I. SU 1425833 A1