Optical grating displacement sensor distance measuring device based on FPGA

Abstract

The invention provides an optical grating displacement sensor distance measuring device based on an FPGA. The functions of the optical grating displacement sensor distance measuring device consisting of four traditional signal finely dividing circuits, a direction distinguishing counting circuit and a microprocessor are realized by utilizing the programmable logic door array technology through the programming of the hardware description language, and all circuits and the microprocessor are realized through programming and are configured into a single chip of one FPGA. Except a small number ofperipheral storage and configuration chips, all logic functions of the whole system are realized in the single chip. Thereby, the invention has the advantages of low power consumption, strong anti-jamming capability, high precision, simple circuit and high stability. The circuit can be conveniently upgraded and modified only through modifying corresponding HDL languages and the program of the microprocessor without redesigning and remanufacturing a circuit board. Thereby, the invention can be widely used in fields requiring high-precision measurement and high-precision mechanical processing in complicated environment.

Description

technical field [0001] The present invention is an FPGA-based grating displacement sensor ranging device, especially for occasions where high-precision measurement of displacement and stroke is required, such as the field of high-precision numerical control machining and the like. Background technique [0002] At present, the usual grating displacement sensor ranging device is composed of three parts: front-end grating displacement sensor, four-division circuit and position counting circuit. The A and B two-phase signals generated by the grating displacement sensor are reshaped by the 7414 Schmitt trigger and then sent to the debating circuit, and the debating circuit passes the A and B two-phase signals through the monostable trigger and a certain The logic extracts the signal edge into four subdivisions and then sends it to the NOR gate to realize the direction of the A and B two-phase signals, and then sends the signal after the difference to the 8-bit reversible counte...

AI Technical Summary

Problems solved by technology

The use of the above circuit often requires more logic chips, more circuit components, increased power consumption, complex structure, decreased stability, and is easily disturbed by the outside world, so it is not suitable for applications in complex and harsh environments.

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