CS249317B1 - Wiring for position sensing by pulse sensors - Google Patents

Abstract

The connection solves the position measurement using pulse sensors and the evaluation of the reference point. The connection significantly reduced the number of elements, as not only the circuits connecting the counters to the microcomputer, but also other circuits in the part of the actual counting were eliminated. The essence lies in the connection of the following blocks according to the attached drawing: microcomputer, counter, reference signal release, reference evaluation, signal processing and incremental sensors. The connection can be used in microprocessor systems for controlling working machines.

Description

The invention solves the connection for position sensing by means of impulse sensors and evaluation of the reference point.

The prior art pulse encoder solutions use counters incompatible with the bus information transfer system in the microcomputer system as counters. The solution assumes circuits that mediate this connection in the same way as when evaluating the reference point.

This drawback is eliminated by the circuit according to the invention, which is based on the fact that the outputs of the main tracks of each incremental encoder are connected, via their respective signal processing circuit, to the counting input of the counters and to the first evaluation inputs of the reference evaluation block. the zero trace output of each incremental encoder is connected, the reference evaluation block enable input is connected to the reference enable block output, the reference evaluation block output is connected to the microcomputer program interrupt request input, the control bus, and the microcomputer address bus are connected to their respective inputs counters and the corresponding inputs of the reference signal release blocks, the data bus of the microcomputer connects both the data terminals of the counters and the data inputs of the block release of the reference signal.

The circuit according to the invention has significantly reduced the number of elements, since not only the circuits connecting the counters to the microcomputer, but also other circuits in the part of the actual counting have been omitted. Circuit savings are evident from the fact that, for example, only 16 integrated circuits are needed in a counter block for 16-bit subtraction of three pulse sensors. Simplification also occurred in the reference evaluation block, where the release of the selected axes in the reference zone area is realized by one circuit.

An exemplary embodiment of the circuit according to the invention is shown in the attached drawing representing a block diagram.

The outputs of the main tracks of each incremental encoder 6, 6n are connected both via their respective signal processing circuit 5, 5n to the counter input of the counter block 2 and secondly to the first evaluation inputs of the reference evaluation block, to the second evaluation inputs of the zero track output of each incremental encoder 6n, reference evaluation enable block ý is connected to reference output bolt J3, reference evaluation block output jj is connected to microcomputer program interrupt request input JL> control bus and microcomputer address bus J1 are connected to their respective block inputs 2 of the counters and the corresponding inputs of the reference 2 enable block 2, the data terminals of the counter 2 block and the data inputs of the reference 2 enable block 2 are connected to the microcomputer data bus 1. lu.

The outputs of the main tracks of each incremental encoder 6, 6n are applied to their respective signal processing circuit 3, 5n, in which they are adjusted so that pulses from the respective output of the signal processing circuit 2 < on the corresponding counter, the input of the counter block 2. From the data terminals of the counter block 2, the data from the individual counters are fed to the data bus of the microcomputer 2, where it is processed accordingly.

For reference point evaluation, the master track outputs and the zero track output of each incremental encoder 6, 6n are applied to the respective evaluation inputs of the reference evaluation block 4, in which the logical product of the main track and zero track values of each incremental encoder 6n is released. blocked by the release input of block 4 of the reference evaluation by the controlled output of block 2 of the release of the reference signal. The signals thus processed from all incremental encoders 6, 6n are logically summed and, via the output of the reference evaluation block 2, brought to the input of the program interruption request of the microcomputer 1, where the corresponding program is called. The invention can be used in microprocessor control systems for working machines.

Claims (1)

Circuit for sensing positioning by incremental encoders comprising incremental encoders, signal processing circuits and a counter block, characterized in that the main track outputs of each incremental encoder (6, 6n) are connected via their respective signal processing circuit (5, 5n) to a counting input the counter (2) of the counter (2), and to the first evaluation inputs of the reference evaluation block (4), to whose second evaluation inputs the zero trace output of each incremental encoder (6, 6n) is connected; (3) releasing the reference signal, the output of the block (4) of the reference evaluation is connected to the microcomputer program interrupt request input (1), the control bus and the microcomputer address bus (1) are connected to their respective counter inputs (2) and with their respective inputs of the release block (3) of the reference signal, the data terminals of the counter block (2) and the data inputs of the block (3) of the release of the reference signal are connected to the microcomputer data bus (1)