JPS5729911A - Counting device - Google Patents

Abstract

PURPOSE:To execute counting exactly and at a high speed without using an interruption processing, by constituting device so that a count data of an up-down counter is latched by a latching circuit, and also the counter is cleared and the next input pulse is counted. CONSTITUTION:A signal from a linear encoder consisting of a scale part 1 and a primary means 2 is inputted to a direction discriminating circuit 4 through an amplifying and waveform shaping circuit 3, is synchronized with a clock signal phi1 from a two phase clock oscillator 10, and an up or down count pulse is provided to an up-down counter 5. Its count data is inputted to a latching circuit 6 and is latched. This data is inputted to a microcomputer 7, also the microcomputer 7 sends a start signal to a synchronizing circuit 9, the circuit 9 is synchronized with a clock signal phi2, and a latch signal and a reset signal are sent to the latching circuit 6 and the counter. An operation result of the computer 7 is displayed on a display part 8. In this way, counting is executed exactly and also at a high speed without using an interruption processing.