摘  要

电磁阀综合特性的测试是电磁阀研发和生产中必不可少的重要环节。传统的电磁阀综合特性测试劳动强度大、效率和测试精度都较低，电磁阀综合特性测试的测试项目多，其测试系统复杂且要求高可靠性和柔性。

对电磁阀的工作原理进行分析，归纳其综合特性；确定测试系统需要采集的的主要特征量，如压力、温度、流量等参数，进行相应的传感器选型；设计传感器放大滤波电路，采集卡的选型；PLC与虚拟仪器平台之间进行串行通讯，利用PLC对电磁阀、电机、变频器等执行机构进行控制；上位机人机界面的软件设计，包括信号采集模块，信号时域分析和显示，信号的保存等；

本文首先对电磁阀及其综合特性进行了简介，然后提出两种设计方案，并对其进行论证，然后确立一种总体方案进行设计。其次是系统硬件设计，本文详细介绍了系统的硬件组成和主要设备及元器件的选型，并给出系统的硬件接线图。最后进行软件设计，软件设计分为下位机控制程序设计和上位机程序性设计，本文给出了下位机控制程序自动和手动过程的详细流程图，并对它们进行行详细的分析，并对上位机程序部分的监控画面设计和变量链接做了详细的介绍。最后，通过对本系统进行联机调试，本系统基本上可以实现设计要求。实验证明，该系统可以精确地描述高性能电磁阀综合特性，并且自动化程度和检测效率得到了很大的提高。

关键词  电磁阀；综合特性；测试系统；PLC；LabVIEW

ABSTRACT

The test of the comprehensive characteristics of solenoid valve is an essential link in the research and production of solenoid valve. The traditional solenoid valve comprehensive characteristic test Labor intensity，efficiency and test accuracy are relatively low，solenoid valve comprehensive characteristic test many test items，its test system is complex and requires high reliability and flexibility.

The principle of the solenoid valve is analyzed and its comprehensive characteristics are summarized. The main characteristic parameters of the test system，such as pressure，temperature and flow rate，are determined，and the corresponding sensor selection is carried out.

This paper first introduces the solenoid valve and its comprehensive characteristics，then puts forward two design schemes，and demonstrates them，and then establishes a general scheme for design. Secondly，the hardware design of the system，this paper introduces the hardware composition of the system and the selection of the main equipment and components，and gives the hardware wiring diagram of the system. Finally，the software design is divided into the lower computer control program design and the upper computer program design. This paper gives the detailed flow chart of the automatic and manual process of the lower computer control program，and makes a detailed analysis of them. A detailed introduction. Finally，through the system on-line debugging，the system can basically achieve the design requirements. Experimental results show that the system can accurately describe the high performance solenoid valve comprehensive characteristics，and the degree of automation and detection efficiency has been greatly improved.

Keywords Solenoid valves；integrated characteristics；test system；PLC；LabVIEW