SU1365355A1 - Shaft angle-to-code converter - Google Patents

Abstract

The invention relates to automation and computing and can be used to connect analog information sources with a digital computer. In order to simplify into the converter the angle of rotation of the shaft into a code containing a generator of 1 pulses, a power supply unit 2, a phase shifter 3, null organs 4, 5 and 6, drivers 7, 8 and 9 pulses, counters 10 and II, trigger 12 13 and multiplexer 14. Phaser 3 produces two signals that are out of phase relative to its input signals by an angle Cf proportional to the angle of rotation of the phase shifter 3. Zero organs 4 and 5 operate from the output signals of the phase shifter 3, and null organ 6 from the input phase shifter 3. Counter P continuously count There are pulses of the frequency f of the generator I. According to the signal of the zero-organ 6, the counter 11 is set to the initial state. In the time interval from the operation of the null-organ 4 to the operation of the null-organ 5, the counter 10 receives impulses of frequency f, and after the operation of the null-organ 5 it arrives at frequencies 2 f. The pulse of the overflow of the counter 10, the output code of the counter 11 is written to the register 13. 1 Il. cl

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 aim of the invention is to simplify the converter.

The drawing shows a block diagram of the converter.

The shaft rotation angle-to-code converter contains a pulse generator 1, a power supply unit 2, a phase shifter 3, the first 4, the second 5 and the third 6 zero-organs, the first 7, the second 8 and the third 9 pulse shapers, the first 10 and the second 11 counters, a trigger 12, register 13 and multiplexer 14.

The device works as follows.

From the outputs of block 2, sinusoidal voltages of equal amplitude and with a relative phase shift ТГ / 2 are applied to the primary windings of the phase shifter 3. The phase shift of the voltages on the secondary windings of the phase shifter 3 relative to the voltages on the respective primary windings is proportional to the rotation angle of the phase shifter 3. At the outputs of the zero organs 4, 5 and 6, meanders are formed, the fronts of which coincide with the passage of the corresponding zero level voltages. The phase shift between the signals at the outputs of the zero-bodies 4 and 6 is proportional to the rotation angle of the rotor of the phase shifter 3. The signal at the output of the zero-body 5 lags in phase from the signal at the zero-output 4 by T / 2. At the outputs of the formers 7, 8 and 9, short pulses are generated on the negative front of the input signals.

The information input of the n-bit counter 11 from generator 1 receives pulses of frequency f. By the impulse of the imaging unit 9, the counter 11 is reset, the cai-ibiM sets the reference point. On the negative edge of the signal at the output of the zero organ 4, the output of the trigger 12 sets a zero signal allowing the filling (nl) of the discharge counter 10. While from the zero authority 5 the control input of the multiplexer 14 is received (a single signal from the generator output 1 to counter 10 information input

impulses of frequency t- arrive. When a zero signal is set at the output of the zero-organ 5, the information input of the counter 10 receives pulses of frequency 2 f. When the counter 10 overflows with the pulse of the driver 8, the counter code 11 is entered into the register 13, the inhibit signal is set at the output of the trigger 12, the counter 10 is set to zero. The code in the register 13 is proportional to the rotation angle of the rotor of the phase shifter 3, and the conversion error is equal to half the sum of the phase errors of the signals on the secondary windings of the phase shifter 3, which have opposite signs and mutually compensate, which ensures high accuracy of the converter.

Claims (1)

Invention Formula five 0 five 0 A shaft rotation angle converter into a code containing a pulse generator, the first output of which is connected to the input of the power supply unit, the outputs of the power supply unit are connected to the inputs of the phase shifter, the outputs of which are connected to the inputs of the first and second zero-bodies, the output of the first zero-body through the first pulse shaper connected to one trigger input, the first counter, the second pulse shaper, the first output of the power supply through the third null organ connected to the input of the third pulse shaper, the output of which It is connected to the installation inputs of the second counter, which is the fact that, in order to simplify the converter, a register and a multiplexer are entered into it, the 5th control input of which is connected to the output of the second zero-organ, the informational inputs are connected respectively to the second and third outputs , and the output is connected to the information input of the first counter, the installation inputs of the first counter are connected to the trigger output, and the overflow output of the first counter through the second pulse driver is connected to another the trigger and the control input of the register, the second output of the pulse generator is connected to the information input of the second counter, you five 31365355 .4 the bit moves of which are connected to the outputs of the register are the outputs of the information inputs of the register, and the converter.