Optical grating displacement sensor distance measuring device based on FPGA

A technology of sensor distance measurement and grating displacement, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of unsuitable applications in complex and harsh environments, easy to be interfered by the outside world, and many circuit components, so as to achieve design confidentiality Strong, enhanced anti-interference ability, strong anti-interference ability

Inactive Publication Date: 2010-07-07
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, de

Method used

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  • Optical grating displacement sensor distance measuring device based on FPGA
  • Optical grating displacement sensor distance measuring device based on FPGA
  • Optical grating displacement sensor distance measuring device based on FPGA

Examples

Experimental program
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Example Embodiment

[0009] like image 3 As shown, on the FPGA development software Quartus II provided by Altera Corporation, the D flip-flops, NOT gates, AND gates, NOR gates and up-and-down counters involved in the schematic diagram are programmed and debugged through VerilogHDL language.

[0010] like image 3 As shown, connect the compiled and debugged modules correctly according to the schematic diagram, simulate them through the FPGA development software Quartus II, and analyze the output timing (such as figure 2 ).

[0011] Customize the Nios II processor as needed to properly connect the entire system.

[0012] Write the source code for the processor to run, write the whole system wiring and source code into the configuration chip, and carry out the joint debugging of the system.

[0013] Device model and parameters:

[0014] FPGA chip: Altera's Cyclone II EP2C5Q208C8,

[0015] Parameters: 4608 logic cells, embedded 18-bit x 18-bit multiplier, dedicated external memory interface ci...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01B11/02
Inventor 陈建明王亭岭徐吉郭恒陈利平张彬梁妍王娜孟晗
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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