基于STM32的振动测试实时分析系统
发布时间：2018-11-06 09:04
【摘要】：振动是机械设备运行中常见的问题，随着工业技术的发展，对机械设备提出了微振动、低噪音的要求，设备的结构也要求有比较高的抗振能力，因此要进行机械结构的振动分析，改善设备的抗振性能。这就需要对机械结构的振动强度、频率及动态响应特性等因素进行测试分析，以便了解设备的振动状态，寻找出振源，进而采取合理的减振措施。 系统以简支梁为振动模型，对其进行分析，，首先进行了理论计算，得出了简支梁的前三阶固有频率,为振动测试实时分析系统做了理论上的准备。 振动测试系统由三大部分组成：传感器、数据采集板和上位机。传感器采用的是压电加速度传感器,二线制，DC4-20mA信号输出；数据采集板硬件采用了以32位的ARMcortex-M3为核心的STM32F103系列微处理器，采集板主要包括信号调理、AD采样和信号传输等单元；上位机采用美国NI公司开发的虚拟仪器LabVIEW软件为平台，利用其可视化的图形编程方法编写了振动测试系统软件，结合NI-VISA节点和标准USB2.0协议，与数据采集板通过USB进行通信，形成了基于STM32的振动测试实时分析系统。 系统将传感器输出的电流值信号，经电流至电压的转换处理，送往仪表放大器AD620进行信号放大，经微处理器AD采样转换，利用USB总线将数据传输到上位机进行分析。论文对简支梁进行了振动测试，利用所开发的系统对简支梁振动实验数据进行了处理，给出了时域和频域的图形显示及前三阶固有频率的测试结果。
[Abstract]:Vibration is a common problem in the operation of machinery and equipment. With the development of industrial technology, the requirements of micro vibration and low noise are put forward for machinery and equipment. Therefore, the vibration analysis of the mechanical structure should be carried out to improve the anti-vibration performance of the equipment. Therefore, it is necessary to test and analyze the vibration intensity, frequency and dynamic response characteristics of the mechanical structure in order to understand the vibration state of the equipment, find out the vibration source, and then take reasonable measures to reduce the vibration. The system takes the simply supported beam as the vibration model and analyzes it. Firstly, the theoretical calculation is carried out, and the first three natural frequencies of the simply supported beam are obtained, which makes a theoretical preparation for the real time vibration analysis system. The vibration test system consists of three parts: sensor, data acquisition board and upper computer. The sensor is piezoelectric acceleration sensor, two-wire system, DC4-20mA signal output; The hardware of the data acquisition board adopts STM32F103 series microprocessor with 32-bit ARMcortex-M3 as the core. The acquisition board mainly includes signal conditioning, AD sampling and signal transmission. The host computer uses the virtual instrument LabVIEW software developed by NI Company of USA as the platform, using its visual graphic programming method to compile the vibration test system software, combining the NI-VISA node and the standard USB2.0 protocol. The real-time vibration analysis system based on STM32 is formed by communicating with data acquisition board through USB. The output current signal of the sensor is transmitted to the instrument amplifier AD620 for signal amplification through the conversion of current to voltage. The signal is sampled and converted by microprocessor AD. The data is transmitted to the upper computer by USB bus for analysis. In this paper, the vibration test of simply supported beam is carried out, and the experimental data of simple supported beam are processed by using the developed system. The graphical display of time domain and frequency domain and the test results of the first three natural frequencies are given.
【学位授予单位】：大连工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH113.1;TB53
本文编号：2313836
[Abstract]:Vibration is a common problem in the operation of machinery and equipment. With the development of industrial technology, the requirements of micro vibration and low noise are put forward for machinery and equipment. Therefore, the vibration analysis of the mechanical structure should be carried out to improve the anti-vibration performance of the equipment. Therefore, it is necessary to test and analyze the vibration intensity, frequency and dynamic response characteristics of the mechanical structure in order to understand the vibration state of the equipment, find out the vibration source, and then take reasonable measures to reduce the vibration. The system takes the simply supported beam as the vibration model and analyzes it. Firstly, the theoretical calculation is carried out, and the first three natural frequencies of the simply supported beam are obtained, which makes a theoretical preparation for the real time vibration analysis system. The vibration test system consists of three parts: sensor, data acquisition board and upper computer. The sensor is piezoelectric acceleration sensor, two-wire system, DC4-20mA signal output; The hardware of the data acquisition board adopts STM32F103 series microprocessor with 32-bit ARMcortex-M3 as the core. The acquisition board mainly includes signal conditioning, AD sampling and signal transmission. The host computer uses the virtual instrument LabVIEW software developed by NI Company of USA as the platform, using its visual graphic programming method to compile the vibration test system software, combining the NI-VISA node and the standard USB2.0 protocol. The real-time vibration analysis system based on STM32 is formed by communicating with data acquisition board through USB. The output current signal of the sensor is transmitted to the instrument amplifier AD620 for signal amplification through the conversion of current to voltage. The signal is sampled and converted by microprocessor AD. The data is transmitted to the upper computer by USB bus for analysis. In this paper, the vibration test of simply supported beam is carried out, and the experimental data of simple supported beam are processed by using the developed system. The graphical display of time domain and frequency domain and the test results of the first three natural frequencies are given.
【学位授予单位】：大连工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH113.1;TB53
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