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. 圖Figure 1. Local Safety System
上傳時間: 2013-11-14
上傳用戶:zoudejile
protel99se元件名系表
上傳時間: 2013-11-12
上傳用戶:sz_hjbf
FPGA 具有輕松集成與支持新協議和新標準以及產品定制的能力,同時仍然可以實現快速的產品面市時間。在互聯網和全球市場環境中,外包制造變得越來越普遍,這使得安全變得更加重要。正如業界領袖出版的文章所述,反向工程、克隆、過度構建以及篡改已經成為主要的安全問題。據專家估計,每年因為假冒產品而造成的經濟損失達數十億美元。國際反盜版聯盟表示,這些假冒產品威脅經濟的發展,并且給全球的消費類市場帶來重大影響。本白皮書將確定設計安全所面臨的主要威脅,探討高級安全選擇,并且介紹Xilinx 的新型、低成本SpartanTM-3A、Spartan-3AN 和Spartan-3A DSP FPGA 如何協助保護您的產品和利潤。
上傳時間: 2013-10-26
上傳用戶:simonpeng
Spartan-3AN 器件帶有可以用于儲存配置數據的片上Flash 存儲器。如果在您的設計中Flash 存儲器沒有與外部相連,那么Flash 存儲器無法從I/O 引腳讀取數據。由于Flash 存儲器在FPGA 內部,因此配置過程中Spartan-3AN 器件比特流處于隱藏狀態。這一配置成了設計安全的起點,因為無法直接從Flash 存儲器拷貝設計。
上傳時間: 2013-10-31
上傳用戶:R50974
可編程安全系統,安全總線系統模塊化安全繼電器-PNOZMULTI基礎單元,輸出擴展模塊,輸入擴展模塊,速度監視模塊,通訊擴避展模塊等內容。
上傳時間: 2013-11-12
上傳用戶:sxdtlqqjl
風電場的運行與維護的安全注意事項
上傳時間: 2013-11-04
上傳用戶:brilliantchen
電氣安全
上傳時間: 2015-01-02
上傳用戶:xingyuewubian
在借鑒傳統檢測方法的基礎上,根據壓路機振動信號與壓實程度的相關關系,提出了一種隨車壓實度實時檢測系統。該系統利用振動傳感器采集壓路機振動信號,并將該信號進行A/D轉換,放大、濾波,在時域和頻域進行數字信號處理,進而提取出壓實度實時數值。通過大量現場試驗驗證,本系統計算出的壓實度值與傳統壓實度檢測結果,具有高度的一致性和準確性。
上傳時間: 2015-01-02
上傳用戶:zjc0413
出租汽車計價器使用誤差檢定測量不確定度的評定
上傳時間: 2013-10-22
上傳用戶:giraffe
為滿足對真空度斷路器實時檢測的需求,利用電磁波檢測法實現了真空斷路器真空度在線監測裝置。文章首先分析真空滅弧室局部放電機理,局放電磁波信號特征為裝置設計提供初始參考依據。其次介紹了信號調理電路,通訊接口電路等主要硬件設計方案。進行了工程實際驗證,裝置實現在不改動真空開關主體結構及運行狀態的前提下的真空度實時在線監測。
上傳時間: 2013-10-18
上傳用戶:zhouchang199