温度类输入功能安全型隔离栅的研究与设计

发布时间：2018-05-23 07:23

本文选题：功能安全 + 温度类输入　；参考：《华东理工大学》2013年硕士论文

【摘要】：我国目前正处于经济和社会的转型期,面临经济与社会发展严重失衡的局面,各种安全事故的不断发生,在我国各种工业控制应用领域的运行过程中,存在着许多潜在的危险和风险,包含的复杂性也各不相同,其中很多功能安全是通过采取被动的系统措施获得的,较少部分功能安全是通过安全系统主动获得的,这就需要提高应用不同的安全保护系统,获得更多的主动的系统保护功能。本课题是基于对温度类输入功能安全型隔离栅的研究开发,先对工业温度测量技术、功能安全技术发展进行了详细的介绍,接着对本安防爆技术、电磁兼容技术等进行了深入的研究,并在此技术上提出基于TI公司的24位高精度A/D转换器ADS1247以及16位单片机MSP430F5510的温度测量技术方案,介绍了硬件与软件的设计流程,最终研发出一款高精度低成本功能安全型隔离栅。将现场的热电阻、热电偶信号转换成4～20mA信号,从危险侧隔离传送到安全侧。可通过PC对其进行组态,实现对热电阻、热电偶以及各分度号和量程的设定,同时可对上下限及断线报警输出电流值进行设定。该产品需要独立供电,电源、输入和输出三端隔离。其安全完整性等级达到SIL2,满足工业日益增长的功能安全可靠性要求。
[Abstract]:At present, our country is in the transition period of economy and society, facing the serious imbalance of economic and social development, the continuous occurrence of various safety accidents, and the running process of various industrial control application fields in our country. There are many potential dangers and risks, and the complexity is different. Many of them are achieved through passive system measures, and a few of them are achieved through the initiative of the security system. Therefore, it is necessary to improve the application of different security protection systems and obtain more active system protection functions. This subject is based on the research and development of the temperature input functional safety isolation gate. Firstly, the industrial temperature measurement technology and the development of the functional safety technology are introduced in detail, and then the intrinsically safe explosion proof technology is introduced in detail. The electromagnetic compatibility technology is deeply studied, and the temperature measurement scheme of 24 bits high precision A / D converter ADS1247 and 16 bit single chip microcomputer MSP430F5510 based on TI company is put forward, and the design flow of hardware and software is introduced. Finally developed a high-precision low-cost functional security gate. Convert the field thermal resistance, thermocouple signal to 4~20mA signal and transmit from the danger side to the safe side. It can be configured by PC to realize the setting of thermal resistance, thermocouple, each indexing number and measuring range, and the output current value of upper and lower limit and disconnection alarm can be set at the same time. This product needs independent power supply, input and output three-terminal isolation. Its safety integrity level reaches SIL2, which meets the increasing functional safety and reliability requirements of industry.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：X924.4

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