Design Of The Monitoring Device And HMI For Hoist Brake System Based On Linux

Mine hoist is one of the key electromechanical equipment for mine production.It is responsible for transporting tasks such as lifting minerals,transporting materials,equipment and personnel.However,the hydraulic brake system is an important part of the hoist guaranteeing safe operation for production.At present,the monitoring of the hoist brake system stays in the use of simple devices based on common microcontrollers.Due to its limited computing capacity and poor real-time performance,inaccurate monitoring results and slow data refresh on the monitoring interface often occur.Because of the limited resources of the ordinary single-chip microcomputer,the current monitoring system lacks a friendly human-computer interaction system and it has fewer peripheral interfaces.Also,its function is relatively single and can't meet the needs of modern equipment.For these reasons,taking the mine hoist brake system as the research object,a set of elevator brake monitoring system with Exynos 4412 as the hardware core is designed.Based on the hardware platform,the embedded Linux operating system was transplanted,and a friendly human-machine interface was developed by adopting QT.The monitoring system realizes real-time monitoring of the hoist braking system,and has a friendly interface and easy operation.First of all,analyzing the structure and working principle of the mine hoist hydraulic braking system in this paper and researching common faults of the system,the physical parameters that need to be monitored are summarized.According to the physical parameters relevant to common problems,monitoring methods are proposed,and an overall plan is formulated.Secondly,based on the deficiency of traditional electrical circuit design and analyzing the counterparts functional characteristics,the article builds the overall hardware architecture of the monitoring system.The hardware of the entire monitoring system is divided into three parts by comparing designs: the core board,the backplane and the data acquisition board.According to functional requirements,a specific hardware circuit is designed.Furthermore,an embedded Linux operating system which is available for its high adaptation and stabilization,is ported for the current hardware platform.It includes Bootloader porting,kernel porting and root file system making.This article also developed the specific hardware device driver and QT-based human-computer interaction system.Finally,the article uses data fusion technology to analyze the failure of the hoist brake system.By analyzing the adaptive characteristics of data fusion technology,it adopts a structural model based on two-layer data fusion of feature layer and decision layer.The feature layer fusion method uses BP neural network and the decision layer fusion method adopts D-S evidence theory.The combination of the two improves the ability of the system to diagnose faults.The monitoring system designed in this paper is composed of multiple independent modules,which is easy to install and maintain.It also provides a humanized and intuitive human-computer interaction system simplifying the difficulty operation to staff.The built-in embedded Linux system and reserved peripheral interfaces enable the expansion of more functions.