SU452808A1 - Pulse Control Software - Google Patents

Description

one

The invention relates to the field of industrial automation and may find application in control systems of metal-cutting machines.

A known software pulse control system comprising an input unit, a pulse displacement sensor, a reversible counter, a counter of a fixed number of pulses, a generator, a logic unit, and an actuator.

In the known system, the input unit is connected to a reversible counter via an equivalence circuit, and to receive the anticipation signals, test pulses are applied to the K + 1 and the discharge of the reversible counter between two successive pulses at the output of the K-th bit.

The equivalence scheme does not allow to receive a signal about the direction of the drive, and repeated introduction and removal of test pulses during the process of working out the movement increases the likelihood of a reversible counter working. When specifying the displacement, the value of which is determined by the number of pulses less than twice the number of units in the K bits of the reversible counter, the signal of prediction does not increase or is higher than the counter of a fixed number of pulses provided by cxeNfoft. The setting of the lead time is limited by the time interval between two successive pulses at the output of the K-th discharge of the reversible counter, and the resolution of variation and its spread during the processing cannot be less than the number of units. B The discharges of the reversible counter. This complicates programming, reduces speed and reliability, and limits the scope of systems.

The aim of the invention is to increase: the speed and reliability of the system.

This goal is achieved by the fact that in the layered system a logical fade; It is connected to the comparison unit, the uxfnvnbsov generator, the program input unit, and through a pulse counter to the operating unit.

The proposed software pulse control system has shown; 31kg IK. drawing. It consists of an input unit 1, a comparison unit 2, a reversible counter 3, a pulse displacement sensor 4, a logic unit 5, a generator 6, a fixed number of pulses 7 and an actuator 8. The input unit is used with an input unit with counting inputs ti. Comparison unit 2 consists of logical elements AND OR and NOT. The outputs (+) and (-) of the comparison unit 2 are connected to the actuator 8 and the logic unit 5. The block 5 consists of AND, OR and NOT logic elements and connects the comparison unit 2, the pulse sensor 4 and the generator 6 with the input unit 1 and counter 7 fixed number of pulses. As a pulsed displacement sensor 4, any known pulse transducer with a counting signal generation circuit can be used. The outputs (+), (-) and the counting output of the pulse sensor are connected with a reversible counter 8 and circuit 5. The outputs B, B ... B of the counter 7 with a fixed number of pulses are connected with the actuator 8, their number and order the numbers (indices) are determined by the properties of the drive (the number of stages of regulation, the overrun, etc.). The drive can be stepped, stepped, with stepless regulation, etc. The system works as follows. The number X corresponding to the specified coordinate of the position of the moving object is stored in the memory elements of the input block 1. Comparison unit 2 compares the number X with the number X in the reversible counter, which corresponds to the actual coordinate of the object being moved. If X, - X, then at the output (+) of the comparison block 2 a single signal appears that goes to the executive body 8 and turns on a positive one (to increase the coordinate. Xd the direction of the drive. If X X the single signal appears output (-) and a negative (decreasing X coordinate) direction is included. Thus, D does not need to determine and program the direction of the drive, which simplifies the compilation of the program and reduces its volume. Single signals at the (+) or (-) outputs 2 comparisons include the corresponding Essentially, the counting inputs of (-) or (+) input block 1, after which input block 1 is fed from the generator 6, lead pulses, which are simultaneously summed up in the counter 7 of a fixed number of pulses. The number Q of lead pulses corresponds to the lead value. the numbers O in the counter 7, the generator 6 is turned on, and in the input block there is a number equal to X ± O. Then the actuator turns on. During the movement of the object being moved from the pulse sensor 4 to the reversible counter 3, the counting signal j and i displacement pulses. When X X i 0. t. 8. when the number in the Yes reversible counter is equal to the number in the input block, a zero signal appears at both outputs of the comparison block 2. In this case, the first lead command is sent to the actuator 8, the outputs of the pulse sensor 4 are connected to the counting inputs of the input unit 1 and the counter 7. After this, the movement pulses go through the logic unit 5 to the counting inputs of the input unit 1 and the meter 7. The counting direction of the pulses the movements in the input unit 1 are the same as in the reversible counter 3, and in the counter 7 they are subtracted. BI-B At the outputs 0-2 to -2 of counter 7, signals alternately appear, the number of which is equal to Q -i. Thus, forwarding instructions 8 can be sent to the executive authority with a discreteness not greater than the sampling resolution of the position coordinates of the object being moved. This expands the scope of application of the system, improves the speed and reliability of its operation. At the same time, there is no scatter of the lead time, which reduces the section of the path near the given coordinate, at which the movement is processed at a low speed, and no additional switching in the reversible counter chains, except for the counting of displacement pulses, is required. The appearance of the signal at the output B of the counter 7 serves as a signal for the completion of the testing of a given displacement (coordinates). At this point, the number in the input box is

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If the displacement is less than the normal lead time, then the generator 6 is turned on at L X + A - null sigD3 in both outputs of the comparison unit 2, i.e. the lead value is automatically reduced to C /. This simplifies the compilation of the program, since no additional commands are required when

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Subject of the Invention A pulse control software system comprising a pulse generator, a pulse counter and a series-connected displacement sensor connected to a logic unit, a reversible counter, a comparison unit associated with the program input unit, and an actuator, characterized in that in order to increase the speed and reliability of the system, the logic unit is connected to the comparison unit, the pulse generator, the program input unit, and the pulse meter to the actuator;

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