SU479140A1 - Angle-code-phase pulse converter - Google Patents

Description

one

The invention relates to automation and computing and can be used in angle conversion devices to transmit it in the form of phase shift signals of two pulse sequences.

Angle-code-phase pulse converters are known, containing an angle-code sensor, the bit outputs of which are connected to the inputs of the reversible counter bits, a survey driver, the output of which is connected to the angle-code sensor input input, a pulse generator and interconnected reference channels and variable phase pulses.

The purpose of the invention is to simplify the converter.

This is achieved by introducing the "OR and" AND circuits into the proposed converter, the outputs of the reversible counter being connected via the OR circuit to the polling input of the poll and directly to one of the input channels of the reference and variable phases of the pulses. the outputs of the bits of the angle-CODE sensor, and the output of the pulse generator are connected to the counting input of the reversible counter.

The drawing shows a structural diagram of the proposed Converter.

The polling driver 1 is connected to the polling input of the sensor 2 angle code, the bits of which

connected to the inputs of the bits of the reversible counter 3, including the counting circuit 4 and the trigger of the reverse 5, a pulse generator 6 is connected to the counting input of the reversible counter 3, and the outputs of the outputs are connected to the outputs of the OR circuit 8 with the polling driver 1 and the channels 9 and 10 of the reference and variable phases of the pulses, to the other inputs of which the output of the circuit is connected

"AND 7. Kapal 9 of the reference phase of the pulses includes the scheme" OR AND and the trigger 12. Channel 10 of the variable phase of the pulses consists of the circuit "OR 13, the circuits" AND 14 and 15, the trigger 16 and the switch 17. The outputs of the trigger 12 are connected to the inputs of the circuits "And 14 and 16, the other inputs of which are connected to the output of the circuit" OR 13, and the outputs - with the inputs of the trigger 16. The proposed Converter works as follows.

When the converter is turned on, the pulses of the pulse generator 6 are fed to the input of the reversible counter 3. In the test from the trigger state of the reverse 5, the counting circuit 4 works either on addition or on subtraction.

If the counting circuit 4 is working on subtraction, then after its overflow on the first output of the circuit, a pulse appears, inverting the trigger of the reverse 5; mode is enabled

addin The same impulse through the scheme

The "OR 8 starts the polling driver 1, the output impulse of which records the code into the counting circuit 4 from the outputs of the angle sensor 2. After writing the code, the counting circuit 4 continues to work on addition. At the moment of overflow of the counting circuit 4, a pulse appears at its second output, reversing the flip-flop of the reverse 5. In the reverse state; turn on subtraction mode. The same impulse through the circuit "OR 8 starts the polling generator 1, the output pulse of which records the code into the counting circuit 4 from the outputs of the angle-2 sensor 2.

Thus, after each instant of overflow of the counting circuit 4, a change in the counting direction of the reversible counter 3 occurs and the code is recorded from the outputs of the sensor 2, an angular code.

The counting circuit 4 each time begins to count From the same number P recorded from the output of the sensor angle-code. Therefore, by the moment of overflow during the addition, the pulses are counted, and when P is subtracted, the pulses from the output of the pulse generator 6 (L are the capacitances of the counting circuit 4).

For all, the pulse repetition period at the outputs of the reversible counter 3 is equal to (t is the pulse repetition period at the output of the pulse generator 6).

Since the moments of overflow of the counting circuit 4 in addition and subtraction are separated in time by the magnitude -Pt, by changing the value of P, the magnitude of the phase shift between the sequences of pulses can be changed.

The signal of the reference phase is generated by a trigger 12, to the input of which, through the OR 11 scheme, pulses are output from the output of the reversible counter 3, appearing at the moment of switching the counting direction to addition.

The output signals of the trigger 12 alternately open and close the circuits “And 14 and 15, the output signals of the latter switch the trigger 16, which generates a signal of a variable phase pulses.

The second inputs of the circuits "And 14 and 15, through the circuit" OR 13, receive the impulses from the output of the reversible counter 3, appearing at the moment of switching the counting direction to subtraction.

When the pulse repetition period at the outputs of the reversible counter is 2Nt, their phase shift is half the period.

In order for the sigals at the outputs of the triggers 12 and 16 to have a phase shift equal to zero and not double the repetition period, pulses corresponding to the appearance of the number P N at the outputs of the sensor 2 angle code are selected using the And 7 scheme. These pulses through the circuit "OR 11 and 13 are fed to the input of the trigger 12 and schemes" And 14 and 15, respectively, and have a repetition period,

equal to Nt.

When the axis of the input shaft is rotated, the angle values are converted into code values using the angle-code sensor 2. The values of this P code are rewritten into a reversible counter.

3 at the moments of his breakdown. The pulses from the outputs of the reversible counter 3, appearing at the moments of its overflow, enter the formation of signals of the reference and variable phases. The positions of the trigger 16 are synchronous with the positions of the trigger 12, since the pulses arrive at the inputs of the trigger 16 through the AND 14 and 15 circuits controlled by the trigger 12. At the outputs of the converter, the signals "Meander with a repetition period

equal to 2Nt, and with a phase shift that can vary from 0 to 180 ° C

"180 °"

discreteness equal to. To obtain

N

conversions in the range of 180 ° to 360 ° using switch 17 to output 2, a signal is given from the other side of the trigger 16.

Subject invention

The angle-code-phase pulse converter containing the angle-code sensor, the bit outputs of which are connected to the inputs of the reversible counter bits, a survey driver, the output of which is connected to the angle-code sensor polling input, a pulse generator and interconnected reference and variable channels phases of pulses, which is also distinguished by the fact that, with a simplified converter slot, the "OR and" AND schemes are introduced into it, and the outputs of the reversible counter through the "OR" circuit are connected to the input of the polling generator and directly with one of the inputs als reference and variable phase pulse, to the other input of which through the circuit "and outputs connected bits code angle sensor and the pulse generator output is connected to the count input of the reversible counter.

Wh / move 1

Vylod 2