Optical fiber IMU (inertial measurement unit) data collecting system for unmanned aerial vehicle electric power routing inspection

Abstract

The invention relates to an optical fiber IMU (inertial measurement unit) data collecting system for unmanned aerial vehicle electric power routing inspection. The optical fiber IMU data collecting system comprises a signal input module, a signal collection and preprocessing module and a data communication interface module, wherein the signal input module comprises three paths of accelerometer pulse signals, three paths of gyro pulse signals and three paths of digital temperature signals, and the signals are sent to an FPGA (field programmable gate array) by an optical coupling circuit in an isolated way. The signal collection and preprocessing module is realized by an FPGA chip and a peripheral configuration circuit of the FPGA chip, in addition, the gyro, accelerometer and temperature pulse signals are received in a parallel way, and the smoothening and the preprocessing of data are completed. The data communication module realizes the communication with a host machine through a serial port RS422, on one hand, the data is packed to be sent to a host machine to be resolved or stored, on the other hand, the time synchronization between an IMU and a GPS (global positioning system) is realized, and the reliability of the data is ensured. The invention realizes the light small universal data collection system with high reliability, and important practical significance can be realized on the integrated research and development of the electric power line routing inspection system based on an unmanned aerial vehicle.

Description

Technical field [0001] The invention relates to an optical fiber IMU data acquisition system for unmanned aerial vehicle power inspection, which can be used to design an inertial measurement unit with small size, small weight, long life and high reliability, and is suitable for the field of aviation remote sensing and achieves high Real-time ground observation and imaging with resolution. Background technique [0002] The current operation and maintenance mode and inspection method of high-voltage transmission lines in my country's power grids rely on ground vehicles or walk on foot, use hand-held instruments or naked eyes to inspect facilities to deal with defects, and can no longer meet the development and safe operation of modern power grids. In response to business needs such as daily safety maintenance and emergency handling of such high-voltage power lines, my country has carried out research on the key technologies of the safety inspection system for power lines of unmanne...

AI Technical Summary

Problems solved by technology

As a result, the area of ​​the data acquisition board is 102mm×74mm, which restricts the design of the IMU structure and increases its weight

At the same time, the acquisition board is equipped with too many chips and circuits, which increases its power consumption and weight, resulting in a high probability of electromagnetic interference and reduced reliability.

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