A trailable force tester was proposed and designed to detect the magnitude and variation of trailable force for hydraulic switch machine. The hardware platform and software platform of this tester were established through the LPC2214 chip of ARM7 micro controller and the μ C/OS-II real-time Operating System. The real-time changes of trailable force could be displayed in the form of both digit and curve through LCD. Besides, the test data could be stored and transferred to PC through RS232 or USB port, then the data could be analyzed and the results could be printed out. According to the practical application, this tester could completely fulfill the design requirements, and had many advantages such as good stability, high precision and strong anti-interference performance.%为检测液压转辙机挤脱力的大小及变化情况,设计了一款液压转辙机挤脱力测试仪.利用ARM7微控制器LPC2214芯片和μC/OS-Ⅱ实时操作系统,构建了测试仪的硬件平台和软件平台.该测试仪通过LCD以数字和曲线的形式实时显示挤脱力的变化情况,可存储测试数据,并且通过RS232或USB接口上传到PC进行数据分析和曲线及分析结果的打印.实际应用表明,此测试仪完全满足设计要求,且具有稳定性好、精度高、抗干扰性强的优点.
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