摘要
安全仪表系统的周期性测试是确定其运行状况及安全完整性等级的重要措施;结合安全仪表系统测试需求,提出了一种安全仪表系统功能测试仪设计方法,该方法采用微处理器构建的嵌入式系统完成信号采集、数据分析与处理,实现了模拟现场设备发送故障信号和检测SIS安全动作响应;在此基础上研制了基于ARM9和Linux的便携式安全仪表系统功能测试仪,给出了测试仪的软硬件设计;实验表明,该装置能够准确模拟故障信号发生,最大引用误差小于0.5%,较好地完成功能测试工作,具有较强实用价值。
It is an important measure for the health, safety and SIL of SIS to make periodic testing. Combined with the testing demands of SIS, A method of designing a test instrument for safety function of SIS was presented. It adopts embedded system with microprocessor to accomplish data acquisition, data analysis and processing, which can simulate field devices to transmit fault signal and detect response of SIS. Based on this a portable function test instrument for SIS built with ARM9 and embedded Linux was developed. The design of hardware and software was given. The results show that the device can simulate fault signal exactly, whose maximum reference error is less than 0. 5%. It can complete function testing easily and has strong practical value.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第12期3178-3181,共4页
Computer Measurement &Control
基金
科研院所技术开发研究专项资金(2009EG119161)
关键词
安全仪表系统
功能测试
嵌入式系统
safety instrumented system
function test
embedded system
