基于虚拟仪器的磁电机定子自动检测系统的研究

发布时间：2018-06-01 19:37

本文选题：磁电机 + 虚拟仪器　；参考：《华中科技大学》2014年硕士论文

【摘要】：磁电机是利用永磁铁产生磁场的小型交流发电机，是汽油机点火系统中的点火电源，广泛应用于小型汽油机、摩托车以及园林机械等领域，其性能的好坏直接决定发动机火花塞的点火性能，对燃油效率以及整车性能有重要影响。为了满足多型号磁电机定子出厂性能检测的需求，提高检测精度、效率以及自动化水平，，基于虚拟仪器开发了磁电机定子自动检测系统。系统以工业计算机为硬件平台，利用高速数据采集卡PCI-1714UL和工控型I/O板卡PCI-1761分别进行信号的采集与处理和检测台总体的机械与电气动作控制，具有较高的自动化水平和测试柔性。系统采用模块化设计，各功能模块间通过队列消息机制通信，通过多线程操作控制，解决了瞬变信号的高速采集与处理和抗干扰问题。设计并开发了检测台人机界面，可实时观察电压波形及测试参数数值，实现了手动和自动控制两种模式的转换运行。磁电机定子性能测试采用全新的测试方法，首次通过对磁电机电压信号的实时触发分析，确定点火时刻。通过对磁电机电压信号进行采集、滤波、时频和峰值处理，可同步测试出开路峰值电压和点火提前角等指标。采用三针放电模拟火花塞点火，对火花电压和电流信号进行高速同步采集、触发捕获与滤波处理，实时积分运算得出点火能量值，包括实时值、最大值和平均值，弥补了传统测试方法存在的较大缺陷。系统通过实际检测台的开发验证，能够自动同时测试出两个磁电机定子的各项性能指标，测试误差小，检测效率提高80%。研究结果表明，该系统具有较高的测试精度和柔性，系统功能完善，人机界面美观易用，显著降低测试成本和工人劳动强度，在磁电机出厂检测领域具有很大的市场价值，亦对其他自动化测量系统的开发提供重要的参考价值。
[Abstract]:Magnetic motor is a small alternator which uses permanent magnet to produce magnetic field. It is the ignition power source in the ignition system of gasoline engine. It is widely used in the field of small gasoline engine, motorcycle, garden machinery and so on. Its performance directly determines the ignition performance of engine spark plug and has an important effect on fuel efficiency and vehicle performance. In order to meet the demand of multi-type stator performance test, improve the precision, efficiency and automation level, an automatic detection system for stator of magnetic motor is developed based on virtual instrument. The system takes the industrial computer as the hardware platform, uses the high-speed data acquisition card PCI-1714UL and the industrial control I / O card PCI-1761 to carry on the signal acquisition and the processing separately, and the detection platform overall mechanical and electrical movement control, has the higher automation level and the test flexibility. The system adopts modularization design, the communication between function modules is through queue message mechanism, and multi-thread operation control is used to solve the problem of high speed acquisition and processing of transient signal and anti-interference. The man-machine interface is designed and developed, which can observe the voltage waveform and test parameters in real time, and realize the conversion operation of manual and automatic control mode. A new testing method is used to test the stator performance of the magneto motor. The ignition time is determined by the real-time trigger analysis of the voltage signal of the magneto motor for the first time. By collecting, filtering, time-frequency and peak processing of magnetomotor voltage signals, the open-circuit peak voltage and ignition advance angle can be measured synchronously. Three-pin discharge is used to simulate spark plug ignition. The signals of spark voltage and current are collected synchronously at high speed, and the acquisition and filtering are triggered. The ignition energy, including real-time value, maximum value and average value, are obtained by real-time integral operation. It makes up for the defect of the traditional test method. Through the development and verification of the actual test platform, the system can automatically test each performance index of the two magnetomotor stator at the same time, the test error is small, and the detection efficiency is increased by 80%. The research results show that the system has high testing precision and flexibility, perfect system function, beautiful and easy to use man-machine interface, significantly reduces the testing cost and labor intensity of workers, and has great market value in the field of magnetic motor inspection. It also provides important reference value for the development of other automatic measurement systems.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM303.3

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