Investigation of Bucket Wheel Excavator Lattice Structure Internal Stress in Harsh Environment through a Remote Measurement System

International Conference on Innovative Research - ICIR Euroinvent 2017

Risteiu, M.^1 ; Dobra, R.^1 ; Andras, I.^2 ; Roventa, M.^2 ; Lorincz, A.^3

Computer Science and Engineering Department, 1 Decembrie 1918 University of Alba Iulia, Gabriel Bethlen Str. No. 5, Alba Iulia

510009, Romania^1

Machinery Department, University of Petrosani, University Street, No. 11, Petrosani, Romania^2

Automation Department, University of Petrosani, University Street, No. 11, Petrosani, Romania^3

关键词: Analog to digital converters;    Bucketwheel excavators;    Common mode rejections;    Communication solutions;    Industrial control applications;    Low-frequency vibration;    Microcontroller systems;    Temperature stability;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012065/pdf
DOI  :  10.1088/1757-899X/209/1/012065

来源: IOP

【 摘 要 】

The paper shows the results of a lab model for strain gauges based measuring system for multiple measuring heads of the mechanical stress in lattice structures of the bucket wheel excavator for open pit mines-harsh environment. The system is designed around a microcontroller system. Because of specific working conditions, the measuring system sends data to a processing system (a PC with Matlab software), we have implemented a secure communication solution based on ISM standard, by using NRF24L01 module. The transceiver contains a fully integrated frequency synthesizer based on crystal oscillator, and a Enhanced ShockBurst™ protocol engine. The proposed solution has a current consumption around 9.0 mA at an output power of -6dBm and 12.3mA in RX mode. Built-in Power Down and Standby modes makes power saving easily realizable for our solution battery powered. The stress from structures is taken by specific strain gauges adapted to low frequency vibrations. We are using a precision 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor-instrumentation device, with low drift voltage, low noise, common mode rejection signal, frequency and temperature stability. As backup implementation for measurements a high speed storage implementation is used.