Functional safety assessment for a 3D safety sensing system

NSERC Engage项目旨在对3D安全传感系统进行功能安全评估，该系统是他设计的，目前正在由S.A.F.E.进行测试Engineering Inc.用于三维区域监测。该系统用于保护移动机械附近的人员。当一个被监控的体积被侵犯时，系统将关闭该体积内的运行机械，以防止人身伤害。现有的商业产品只能在二维水平上工作，S.A.F.E. Engineering Inc.被认为是研究3D安全技术的先驱公司。为了使该产品吸引更多的客户，需要确定该产品的定量可靠性水平。这对S.A.F.E.提出了挑战。Engineering Inc.由于3D安全系统集成了硬件和软件，因此对于评估硬件-软件集成系统可靠性的适当方法尚未达成共识。申请人提出了一种增强的基于输入域的模型，该模型将用于捕获由软件-硬件集成系统呈现的特定特性，诸如事件依赖性和时序。此外，贝叶斯停止规则将被用来确定什么样的置信水平的故障概率的需求将是可接受的。 为了开展这项研究，该项目分为四个阶段。第一个月用于通过观察操作过程和咨询S.A.F.E.使研究人员熟悉3D安全监测系统。Engineering Inc.人员的此阶段结束时的目标是确定需要由增强的基于输入域的模型捕获的关键组件。第二阶段将是设计增强的基于输入域的模型。这预计将持续两个月，之后将调查贝叶斯停止规则，以提供统计证据，通过测试连续的需求而没有失败，来支持集成系统的可靠性。最后一个阶段是写报告。拟议的功能安全评估预计不仅会给S.A.F.E.带来经济效益，工程公司，同时也为加拿大人带来安全利益。

This NSERC Engage project aims to perform a functional safety assessment for a 3D safety sensing system, which his designed and is currently under test by S.A.F.E. Engineering Inc. for three-dimensional zone monitoring. This system is used to safeguard personnel in the vicinity of moving machinery. Whenever a monitored volume is violated, the system will shut down the operating machinery within that volume, so as to prevent human injury. Existing commercial products only function at the two-dimensional level and S.A.F.E. Engineering Inc. is believed to be the pioneer company investigating the 3D safety technology. In order for this product to attract more customers, the quantitative reliability level of this product needs to be determined. This presents a challenge to S.A.F.E. Engineering Inc. since the 3D safety system integrates both hardware and software, and there is no consensus on appropriate methods to evaluate reliability for hardware-software integrated systems. The applicant proposes an enhanced input domain-based model that is to be used to capture the specific characteristics presented by software-hardware integrated systems such as event dependency and timing sequence. Furthermore, Bayesian stopping rules are going to be used to determine what confidence level of probability of failure on demand will be acceptable. To carry out this research, the project is divided into four stages. The first month is used to familiarize the researchers with the 3D safety monitoring system through observing the operating process and consulting S.A.F.E. Engineering Inc. personnel. The goal at the end of this stage is to identify the key components that need to be captured by the enhanced input domain-based model. The second stage will be on the design of the enhanced input domain-based model. This is expected to last for two months, after which the Bayesian stopping rules will be investigated to provide statistical evidence to support the reliability of the integrated system by testing consecutive demands without failure. The last stage will be on report writing. The proposed functional safety assessment is expected to not only bring economic benefits to S.A.F.E. Engineering Inc., but also to bring safety benefits for Canadians.