机械安全.电敏感保护设备.第4-2部分:使用视觉保护装置（VBPD）的设备的特殊要求.使用参考图形技术（VBPDPP）时的附加要求

[中文适用范围]： 本文件规定了采用基于视觉的防护装置（VBPD）并使用参考图案技术（VBPDPP）进行传感功能设计的、用于检测人员作为安全相关系统一部分的非接触式电敏防护设备（ESPE）的设计、制造和测试要求。特别关注确保实现适当安全相关性能的 Features。ESPE 可包含可选的安全相关功能，其要求见于 IEC 61496-1:2020 和本文件的附件 A。本文件仅适用于不需要人工干预即可检测的自动视觉型 ESPE。适用于检测进入检测区或在检测区内存在的物体的自动视觉型 ESPE。适用于采用主动照明技术的 ESPE。排除了使用 400 nm 至 1 500 nm 波长范围以外的辐射的 VBPDPP。本文件不适用于所需用于检测对象复杂分类或区分的那些方面。本文件适用于声明检测能力最高可达 200 mm 的 VBPDPP。 [外文原描述]： IEC TS 61496-4-2:2022 specifies requirements for the design, construction and testing of non-contact electro-sensitive protective equipment (ESPE) designed specifically to detect persons as part of a safety-related system, employing vision-based protective devices (VBPDs) using reference pattern techniques (VBPDPP) for the sensing function. Special attention is directed to features which ensure that an appropriate safety-related performance is achieved. An ESPE can include optional safety-related functions, the requirements for which are given in Annex A of IEC 61496-1:2020 and this document. Where this document does not contain all necessary provisions, then IEC TS 62998-1 applies. It is also possible, for those aspects not considered in this document, to use provisions from IEC TS 62998-1 additionally. This document does not specify the dimensions or configurations of the detection zone and its disposition in relation to hazardous parts for any particular application, nor what constitutes a hazardous state of any machine. It is restricted to the functioning of the ESPE and how it interfaces with the machine. A VBPDPP is defined as consisting of a single image-sensing device viewing on a passive reference pattern as the background and where the detection principle is based on blocking or partially preventing the view of the pattern. Information about the thickness, shape, surface characteristics or location of the object is not required for detection. For multi-image sensing devices, additional techniques, requirements and test procedures can be necessary. - This document is limited to automatic vision-based ESPEs that do not require human intervention for detection. - It is limited to automatic vision-based ESPEs that detect objects entering into, or are present in, a detection zone(s). - It is limited to ESPEs using active illumination technique. - Excluded from this technical specification are VBPDPPs employing radiation at wavelengths outside the range 400 nm to 1 500 nm. - This document does not address those aspects required for complex classification or differentiation of the object detected. This document is relevant for VBPDPPs having a stated detection capability up to 200 mm. This document does not deal with EMC emission requirements. IEC TS 61496-4-2:2022 cancels and replaces the first edition published in 2014. This edition constitutes a technical revision. This edition includes the following technical changes with respect to the previous edition: a) Some requirement clauses and test procedures have been adapted or removed because they have been consolidated in IEC 61496-1:2020 (e.g. 5.4.6.2 of IEC 61496-1:2020 Light sources or Clause A.9).