An FPGA-based multi-path displacement pulse optimization device and method for pipeline caliper

Abstract

The invention discloses a pipeline diameter measurement instrument multipath displacement pulse optimization device based on FPGA and a method, belonging to the pipeline detection technology field. The pipeline diameter measurement instrument multipath displacement pulse optimization device comprises a pipeline diameter measurement instrument main body, a plurality of odometers, a signal collection module, an optical coupling isolation unit and an FPGA central processing unit. The signal collection module comprises a plurality of convex lenses, a plurality of rotary encoders, and a plurality of light sensitive elements; each odometer wheel shaft is provided with a convex lens, a rotary encoder, and a light sensitive member; the convex lens, the rotary encoder, and the light sensitive element coaxially rotate along with the odometer wheel; the plurality of light sensitive elements are connected to the input terminal of the optical coupling isolation unit; the output terminal of the optical coupling isolation unit is connected to the input terminal of the FPGA central processing unit. The invention utilizes the FPGA parallel processing mechanism, improves the processing speed of the displacement pulse signal, effectively distinguishes the working state of a plurality of odometer wheels, solves the displacement accumulation error and improves the displacement measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of pipeline detection, and in particular relates to an FPGA-based device and method for optimizing multi-channel displacement pulses of a pipeline caliper. Background technique [0002] As the service life of laid oil and gas pipelines continues to increase, pipeline accidents caused by corrosion, deformation, leakage, etc. caused by aging pipelines are increasing. Therefore, it is of great significance to carry out leak detection for long-distance pipelines. How to accurately detect and repair the deformation and defects in the pipeline in time is an important task of the pipeline caliper. Accurate positioning is an important guarantee for timely maintenance of pipeline defects. The mileage wheel is the mileage measurement device of the pipeline caliper. It is the key technology to ensure the normal operation of the mileage wheel in the complex pipeline environment and to output high-precision pulse signal...

AI Technical Summary

Problems solved by technology

At present, the existing pipeline caliper mileage wheel positioning technology still lacks a complete and efficient optimization method and calibration method

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