机械传动设备状态在线监测系统的研制

发布时间：2018-04-26 18:38

本文选题：机械传动设备 + 在线监测　；参考：《重庆大学》2012年硕士论文

【摘要】：机械传动设备作为机械系统的重要组成部分，是众多机械设备正常工作的关键部件之一。现代机械传动设备的自动化、系统化、复杂化和精密化程度越来越高，从而对机械传动设备状态在线监测和故障诊断技术提出了更高的要求。传统的机械传动设备状态监测系统由于安装不便、成本较高、噪声干扰较大以及测量精度较低等缺点，很难满足现代机械传动系统的要求。随着嵌入式技术、现代电子技术和无线通信技术的快速发展，使得一些从机械角度方面解决较困难的问题，可从电子信号处理和通信方面来解决，使其结构简单，应用范围更广。针对传统的机械传动设备状态在线监测系统的不足，本文进行了基于ARM嵌入式技术的机械传动设备状态在线监测系统的研发。本系统采用基于模数转换器的比值测量法来进行数据测量，直接将传感器安装在所需监测的位置，感知其局部区域变化引起的最强传感信号，从而大大提高了信号的可信度和可靠度。系统采用ARM微控制器LPC1768作为核心控制器件来控制各个模块有序工作；仪表放大器AD8221作为信号调理器件对前端传感器采集的与扭矩成正比的电压信号进行滤波和放大处理；AD7699高性能模数转换器作为数据采样器件实现对模拟信号的A/D采样；NAND FLASH存储芯片作为外部存储器实现对大量数据的可靠保存；CC1101RF芯片作为无线通信器件实现对数据的数字调制、解调和无线传输；功耗控制模块实现对各个电路模块的供电都软件可控，从而降低系统的功耗。通过引入μC/OS II嵌入式实时操作系统来调度各个模块任务程序的运行，实现对模拟信号的采集和调理、A/D转换、数据存储、无线传输以及在上位机实时显示等功能。根据系统设计方案，开发出了具有微型化、低功耗、抗干扰能力强及实时性和可靠性高等特点的嵌入式信号采集、存储及实时传输系统，实现了采集数据高速和低误码率的传输，实时获取了特殊环境下机械传动设备关键旋转部件的扭矩信号。系统已经成功用于实际项目测试中，，在工业现场实时获取了机械传动设备在各种工况下的运行状态数据，取得了良好的测试效果。
[Abstract]:As an important part of mechanical system, mechanical transmission equipment is one of the key components in the normal operation of many mechanical equipment. The degree of automation, systematization, complexity and precision of modern mechanical transmission equipment is becoming higher and higher, which puts forward higher requirements for on-line monitoring and fault diagnosis of mechanical transmission equipment. The traditional mechanical transmission equipment condition monitoring system is difficult to meet the requirements of modern mechanical transmission system because of the disadvantages of inconvenient installation, high cost, large noise interference and low measurement precision. With the rapid development of embedded technology, modern electronic technology and wireless communication technology, some more difficult problems can be solved from the mechanical point of view, which can be solved from the aspects of electronic signal processing and communication, making its structure simple. The scope of application is wider. Aiming at the deficiency of the traditional on-line monitoring system of mechanical transmission equipment, this paper researches and develops the on-line monitoring system of mechanical transmission equipment condition based on ARM embedded technology. In this system, the ratio measurement method based on A / D converter is used to measure the data, and the sensor is directly installed in the monitoring position to perceive the strongest sensing signal caused by the change of local region. Thus, the reliability and reliability of the signal are greatly improved. The ARM microcontroller LPC1768 is used as the core controller to control the orderly operation of each module. Filter and Amplification of Voltage signal in proportion to torque collected by Front end Sensor using instrument Amplifier AD8221 as data Sampler High performance A / D Converter realizes A / D sampling of Analog signal The sample NAND FLASH memory chip is used as the external memory to realize the reliable storage of a large amount of data. The CC1101RF chip is used as a wireless communication device to realize the digital modulation of the data. Demodulation and wireless transmission, power control module can control the power supply of each circuit module, thus reducing the power consumption of the system. The 渭 C/OS II embedded real-time operating system is introduced to schedule the task program of each module. The functions of acquisition and conditioning of analog signals, data storage, wireless transmission and real-time display on host computer are realized. According to the system design, an embedded signal acquisition, storage and real-time transmission system is developed, which has the characteristics of miniaturization, low power consumption, strong anti-interference ability and high real-time and reliability. The transmission of high speed and low bit error rate (BER) is realized, and the torque signal of the key rotating parts of the mechanical transmission equipment under the special environment is obtained in real time. The system has been successfully used in the actual project testing. The running state data of the mechanical transmission equipment under various working conditions have been obtained in real time in the industrial field, and good test results have been obtained.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH165.3;TP274

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