SU1179524A1 - Device for setting discrete angular coordinates - Google Patents

Abstract

A device for setting discrete angular coordinates that contains a drive kinematically connected to an electromechanical scale, the input of which is connected to the power rail, and the output to the input of the first comparator, characterized in that, in order to improve accuracy, the second and third /% g are entered into it fe / comparators, two-threshold comparator, AND-NES element, first, second and third elements AND and clocked TC-trigger, J and K-inputs and inverse output of which are interconnected, output of electromechanical scale is connected To inputs of the second and third the comparators, the outputs of the second and third comparators are connected to the first input of the NAND element and the nepBbiM input of the first element AND, respectively, the input of the two-threshold comparator is connected to the input of the electromechanical scale, and the output to the second inputs of the NAND element and the personal element AND, outputs which soybeans (L dineny with the inputs of the second element And, the output of which is connected to the clock input of a clocked JK-trigger and the first input of the third element And, to the second input of which is connected the inverse output of a clocked JK-trigger, ny input coupled to an output of the first comparator.

Description

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The invention relates to automation and computing devices, in particular, to means for automatically setting discrete angular coordinates, used in monitoring angle converters.

The purpose of the invention is to improve the accuracy of the device.

FIG. 1 shows a block diagram of a device for setting discrete angular coordinates; in fig. 2 time diagrams of his work.

The device contains comparators and 2, the element AND-NOT 3, the element And 4, two-threshold comparator 5, the element And 6, clocked JK-trigger 7, the element And 8, the comparator 9, the drive 10 and the electromechanical scale 11.

A device for specifying discrete angular coordinates operates as follows.

The actuator 10 drives the electromechanical scale 11. The input and output voltages of the electromechanical scale 11 are sinusoidal, but the output voltage is modulated along the angular coordinate (case of amplitude modulation). The phase shift between the input and output voltages of the electromechanical scale 11 is 90. At the outputs of comparators 1, 2 and 9, high level signals are formed, provided that the output voltage of an electromechanical scale exceeds 11 levels of reference voltages U1, U2, U9 of the corresponding comparators 1, 2 and 9 (Fig. 2). The reference voltage U1 of the comparator has a positive polarity and exceeds the voltage of the noise of the electromechanical scale 11. The level of the reference voltage U2 of the comparator 2 has a negative polarity and in absolute value exceeds the voltage of the noise of the electromechanical scale 11. 11 varies from the level of the reference voltage U2 of the comparator 2 to the level of the reference voltage U1 of the comparator 1, without reaching the levels of U1 and U2. The level of the reference voltage U9 of the comparator 9 exceeds the level of the reference voltage U1 of the comparator 1, but does not exceed the maximum value of the output voltage of the electromechanical scale 11.

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The high level signal from the output of the comparator 9 on the inverse output of the clocked JK-flip-flop 7 generates a high level signal. 5 During the polarity change of the input voltage of the electromechanical scale 11, the two-threshold comparator 5 generates short pulses of positive polarity at its output, 0 indicating that the output voltage of the electromechanical scale 11 reaches the extremum, since the phase shift between the input and output voltages of the electromechanical scale 11 is 90 °. Duration of comparators output signals. 1 and 2 are normalized by the output pulses of a two-threshold comparator 5, which synchronize the operation of the NAND element 3 and the AND 4 element (Fig. 2).

If in the extremes of the output voltage of the electromechanical scale 11, the signals at the outputs of the comparators t and 2 have the same polarity, then the output signals of the AND-NE 3 element and the AND 4 element are inverse to each other. In this case, the output of the element And 6 is supported by a low level signal. If, in the extremes of the output voltage of the electromechanical scale 11, the signals at the outputs of comparators 1 and 2 have different polarities, then a high level signal is generated at the output of the NANDI element 3,

5 a At the output of the element And 4 passes

the pulses from the output of the two-threshold comparator 5, since the first inputs of the element AND-NOT 3 and of the element 4 are supported by signals of low and high levels, respectively. AT

In this case, the pulses from the output of the two-threshold comparator 5 pass through the open elements AND 4 and 6 to the clock input of a clocked JK-trigger 5 7. The first impulse from the output of the element And 6 negative edge tilts the clocked JK-trigger 7 so that its J and K -inputs low-level signals, as a result of which all the following pulses from the output of element 6 do not change the state of JK flip-flop 7. Thus, the high signal at the second input of element 8 is maintained by clocked JK-trigger 7 until the end of the first and pulse generated by AND gate 6. Therefore, at the output of the AND element 8 3t formed only one pulse of positive polarity (FIG. 2). The appearance of a pulse at the output of the element And 8 indicates that the angular coordinate of the drive shaft has assumed the calculated value. The number of such calculated values is numerically equal to the number of pairs of poles of the electromechanical scale 11. 244. Improving the accuracy of the device for setting discrete angular coordinates is achieved by the fact that the noise voltage of an electromechanical scale 11 does not affect the accuracy of the device, which is determined by the accuracy of the electromechanical scale I1.

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Output for element I6

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Element Output W 8

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Claims (1)

DEVICE FOR DEFINING DISCRETE ANGULAR COORDINATES, containing a drive kinematically connected to an electromechanical scale, the input of which is connected to the power bus, and the output is connected to the input of the first comparator, characterized in that, in order to increase accuracy, the second and third comparators, a two-threshold, are introduced into it comparator, AND element, first, second and third AND elements and a clocked JK trigger, J and K — whose inputs and inverted outputs are interconnected, the output of the electromechanical scale is connected to the inputs of the second and third comparator c, the outputs of the second and third comparators are connected to the first input of the AND gate and the first input of the first AND gate, respectively, the input of the two-threshold comparator is connected to the input of the electromechanical scale, and the output is connected to the second inputs of the AND gate and the first AND gate, the outputs of which are connected to the inputs of the second element And, the output of which is connected to the clock input of the clocked JK trigger and the first input of the third element And, the second input of which is connected to the inverse output of the clocked LK trigger, the installation input of which of the connections with the output of the first comparator. KZP 1 1179524