基于LabVIEW的变压器振动信号数据采集系统

针对利用振动信号进行变压器状态研究的需求，设计了一种上下位机架构的变压器振动信号数据采集与处理系统。系统下位机由单片机、压电加速度传感器、滤波电路、同步模数转换器和通信接口电路等组成。单片机控制模数转换器将振动信号就地转换为数字量，通过RS485接口连接温度和电流传感变送器，将采集到的现场数据经过以太网Modbus TCP协议与上位计算机进行传送。上位计算机利用LabVIEW开发数据采集和处理软件，实现信号的读取、滤波、频谱分析和实时显示。经过仿真和实测表明系统能够实现变压器振动信号的采集和频谱分析等处理功能，在成本、扩展性、抗干扰和工程实用性等方面具有一定的优势。

Transformer Vibration Signal Data Acquisition System Based on LabVIEW

According to the demand of transformer state research using vibration signal,a transformer vibration signal data acquisition and processing system based on upper and lower computer architecture is designed.The lower computer of the system is composed of single chip microcomputer,piezoelectric acceleration sensor,filter circuit,synchronous analog-to-digital converter (ADC) and communication interface circuit.The single chip microcontroller controls the ADC to convert the vibration signal into digital quantity locally,connects the temperature and current sensor transmitter through RS485 interface,and transmits the collected field data to the upper computer through Ethernet Modbus TCP protocol.The upper computer uses LabVIEW to develop data acquisition and processing software to realize signal reading,filtering,spectrum analysis and real-time display.The simulation and measurement show that the system can realize the processing functions of transformer vibration signal acquisition and spectrum analysis,and has certain advantages in cost,expansibility,anti-interference and engineering practicability.