SU487361A1 - Device for forming azimuth marks - Google Patents

Description

one

The invention relates to automatic control systems and can be used to indicate the angular position of the shaft in the form of azimuth marks.

There are known devices for forming azimuth marks, which contain phase-sensitive comparators, the inputs of which are connected to the accurate timing synchronization mHFiaMH, the control trigger, the output of which is connected to the single input of the logic element AND, the output of which is connected to the pulse shaper of the graduation mark and the input of the reversible counter , to the reset input of which is the key output of the logical element “OR. One input element "ILR". connected to the installation input of the trigger control and with the zero pulse shaper OTMGTKH, and the other with the input of the pulse impurity of the thirty-degree mark.

The disadvantages of the known devices are low reliability of operation, complexity of the equipment, insufficient accuracy of forming scale marks, and the introduction of additional digital converters into them increases the conversion time.

The purpose of the invention is to increase the reliability and accuracy of operation of devices for the formation of az.mutal marks.

This goal is achieved due to the fact that a sector definition decoder, a zero point block 1, a logic block, and a thirty-degree mark decoder are entered into the device. The direct and i1N5ers 1st outputs of the phase-sensitive komunaratov are connected to the inputs of the decoder of the sector definition, the output of which through the logical block and the element I is connected to the input of the counter, the outputs of all

the cells of which are connected to the first input of the decoder of the thirty-degree mark, the output of which is connected to the input of the former of the thirty-degree mark. Recovery output of the sector definition

connected to the input of the logic unit, with the second input of the thirty-degree mark, BHODOL1 mode of the reverse of the counter and the input of the zero mark unit, the output of which is connected to the input of the control trigger setup and the input of the zero-picker.

Pa figs. 1 block diagram of the device; in fig. 2 - diagrams of voltages at the outputs of phase-sensitive comparators and synchronization patterns, but interpreting the sector.

A device for forming azimuth marks contains a zero mark block 1, a block 2 of three a) a compiler for comparing nanometers to synchronous

between each other, block 3 of three phase-sensitive comparators for comparing synchronization voltages to zero, decoder 4 for determining the sector and direction of rotation, logic block 5 for generating a pulse corresponding to five degrees of rotation, logic element "And 6, control trigger 7, input 8 control the reversal of the counter 9, the logical element "OR 10, the decoder for determining the thirty-degree mark 11, the pulse shaper zero mark 12, the pulse shaper n the trigger 13 and shape spruce pulse tridtsatigradusnaya

marks 14.

Tires with a reference voltage Um are connected to the device input, and the inputs of all phase-sensitive comparators of unit 1-3 are connected to the reference voltage with the synchronization voltage from the selsyn coarse-read and precise-read sensors. The inputs of the phase-sensitive comparator of block 1 are connected to the coarse synchronization voltage bus, the inputs of all of the phase-sensitive comparators of block 2, and the first inputs of all of the phase-sensitive comparators of block 3 are connected to the corresponding buses (exact timing synchronization, and the second inputs of all phase-sensitive comparators of block 3 Phase-sensitive comparators of block 2 perform the functions of pairwise comparison of the voltages obtained among themselves, and the phase-sensitive comparators of block 3 of comparison of one of They are at level 0. The direct and inverse outputs of the comparators are connected to the inputs of the sector definition decoder 4.

The two outputs of the decoder 4 are connected to the inputs of block 5, to the control input of which the third output of the decoder 4 is fed. The output of block 5 through the element "AND 6 is connected to the input of the driver 13 and the input of the counter 9. The inputs of the latter through the element" OR 10 are connected to the trigger bus 7 and the output of the decoder 11 connected to the input of the driver 14. The output of the unit 1 is connected to the installation input of the trigger 7 and the input of the driver 12.

The device works as follows.

The input of block I is supplied with the synchronization voltage of the C / and C2 phases of the silsin-coarse-sensor. The inputs of the phase-sensitive comparators of the unit 2 are paired with the synchronization voltage of the phase of the precision readout sensor (for example, C / and C2, C1 and C3, C2 and C3), and the inputs of the comparators of the 3-unit synchronization voltage of the exact readout. Furthermore, blocks 1, 2, and 3 are supplied with a reference voltage, in phase with the synchronization voltage.

The full rotation of the rotor shaft of the precision-guided selsip sensor corresponds to 12 sectors of 50 each. The boundaries of the sectors are determined by comparing the envelopes of the synchronization voltage between themselves and with zero

level. If, for example, the reduction ratio between the shafts of the coarse and precision readout selsin sensors is 1: 36, then one revolution of the precision readout rotor of the sensor is carried out within 10 ° of the coarse readout rotor rotation sensor.

As can be seen from the diagrams in FIG. 2, during forward rotation (clockwise) of the precision oscillator rotor, the front edge of the sector corresponds to the value kN 50 min (where k is the sector number. L is the rotation number of the sender sensor rotor). In the reverse rotation (counterclockwise), this value corresponds to the rear boundary of the sector.

Thus, depending on the direction of rotation, it is necessary to determine the anterior or posterior boundaries of the sector.

When the rotor of the precision sync sensor is turned, the synchronization voltage changes according to the law shown in FIG. 2, a. Phase-sensitive comparators in blocks 2 and 3 produce the signals shown in FIG. 2 bn These signals are sent to the decoder 4. The latter produces two

a pulse corresponding to the sector of the angular position of the shaft of the precision synchro-sensor and the resolution of 5 ° and the signal of the direction of rotation. The direction of rotation signal determines

the order of passage of the fronts of the pulses that determine the sector through the circuit 5, and also permits the generation of a pulse by the zero-point block 1. Block I compares the synchronization envelope of the C / -C2 phase

A coarse readout sensor with a zero level and, if they are equal, generates a signal that sets trigger 7 into one state and starts zero level generator 12. Trigger 7 opens item

"Both 6 and the corresponding fronts of the n-degree azimuthal elevations arrive at the start of the imager 13 n of the degrades azimuthal elevations and at the input of the reversible counter 9, which is preset to the zero state.

During forward rotation, block 5 skips the leading front of the n tigradus mark, and the reverse rotation, the back front. The formation of a zero azimuth pulse in block 1 is similar.

During forward rotation, counter 9 performs summation, during reverse rotation, it is switched using a rotational direction signal input to

controlling the reverse 8, to the subtraction mode. Counter counts incoming pulses. When counting six pulses, the AND decoder is triggered, the signal from the output of which starts the driver 14 and resets the counter 9 to the zero state via element 10. Then the cycle of counting the pulses is repeated.

Subject invention

A device for forming azimuthal elevations containing phase-sensitive

five

comparators whose inputs are connected to the synchronization buses of the exact count, control trigger, the output of which is connected to one input of the logical element "AND, the output of the element" AND connected to the driver of the pulse of the pigradus mark and the input of the counter, to the reset input of which is connected the output of the logical element "OR , one input of the OR element is connected to the control input of the control trigger and to the zero-level pulse shaper, the other to the thirty-degree elevation pulse shaper input, characterized in that in order to improve the reliability and accuracy of the device, a sector definition decoder, a zero mark block, a logic block and a thirty-degree mark decoder are entered into it; where

6

direct and inverse outputs of phase-sensitive comparators are connected to the inputs of the decoder of the sector definition, the output of which is connected to the input of the counter via a logical unit and the element "I"; the outputs of all the counter cells are connected to the first input of the decoder of the thirty-degree mark, the output of which is connected to the input of the shaper of the thirty-degree mark; the control output of the sector definition decoder is connected to the input of the logic unit, to the second input of the thirty-degree mark decoder, to the control input of the counter reversal and to the input of the zero mark unit, the output of which is connected to the control trigger input and zero mark.

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