本文提出的煤矿安全系统由基站、基站控制器、控制中心和安全信息终端组成。本系统能够实时动态监测瓦斯等有害气体浓度，能够人机联防监测矿道中可能存在的安全隐患。井下采用CAN有线网络和Zigbee无线网络相结合的混合组网方式，通过矿工携带的安全信息终端使监测网延伸到每个采掘工作面，实现动态跟踪。控制中心通过友好的人机界面可以查看瓦斯浓度、温度、湿度的最新数据与历史数据，还可以查看报警记录，并把这些数据以曲线图的形式直观的显示出来。 基站和基站控制器是以ARM系列LPC2119微处理器为核心设计的，完成安全信息终端和控制中心之间的通信任务。基站和安全信息终端采用了基于Zigbee技术的SZ05系列嵌入式无线收发模块进行组网通信，采用MC14LC5480语音芯片实现系统的语音功能，基于LPC2119内置的CAN控制器辅以P82C250收发器实现多基站间的网络连接。基站控制器通过CAN总线与基站组网通信，监测基站工作状态，协调各基站与移动终端之间的信息传输，通过RS232与控制中心PC机进行信息交互。在此硬件平台的基础上，给出了基于LPC2119微处理器下的软件设计过程，包括初始化、无线通信模块的通信协议制定和通信程序设计、语音功能的软件设计及编程、基站和基站控制器的通信协议制定和主程序设计、系统监控程序设计及控制中心PC机端人机界面设计等。 经多次调试，实现了控制中心PC机接收安全信息终端检测的环境参数数据并判断瓦斯浓度是否超限，还实现了通过人机界面查询数据、查看曲线图以及发送命令等。
上传时间： 2013-07-14
上传用户：hainan_256
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-05
上传用户：维子哥哥
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-14
上传用户：zoudejile
可编程安全系统，安全总线系统模块化安全继电器-PNOZMULTI基础单元，输出扩展模块，输入扩展模块，速度监视模块，通讯扩避展模块等内容。
上传时间： 2013-11-12
上传用户：sxdtlqqjl
包括了汽车安全系统、多媒体和汽车网络；未来汽车信息终端平台研制，智能无线通讯在促进汽车安全应用中的作用，汽车电子检测平台，以及风河公司的Device Software Optimization and Wind River Automotive等，高端研讨，值得一看。
上传时间： 2014-01-06
上传用户：jkhjkh1982
java实现安全系统的开源代码 java实现安全系统的开源代码
上传时间： 2014-01-19
上传用户：shizhanincc
本文讨论了安全系统设计方面的软件工程。主要分析了一般信息安全系统SSH 和 FTP 之间的差别。
上传时间： 2016-07-30
上传用户：lindor
QT安全系统，结合于QT，能实现SSL、TLS等高端加密协议
标签： 安全系统
上传时间： 2014-01-04
上传用户：helmos
本报告就“数字家庭”这一研究热点中的“家庭安全”方面设计了一套无线多功能家庭安全系统。该系统分为报警信号采集和控制部分和人机交互部分，前一部分实现了对家庭中各种安全隐患，例如：煤气泄漏，非法入侵等进行监控报警，并通过无线数传模块将报警信号传给人机交互部分，由其进行报警处理，针对不同的报警源分类进行语音报警，并通过GSM网络发送短消息进行远程报警。本系统信号传递利用无线方式，省去了布线的麻烦，操作简单，适合老人和孩子使用，具有一定的使用价值。
上传时间： 2016-12-12
上传用户：lyy1234
MSM7512B 可用于ITU-T .23调制解调器（如低价格的内置调制解调器）、远程控制系统、 家庭安全系统等
上传时间： 2014-12-20
上传用户：diets
