机械安全.电敏感防护设备.第4-3部分:使用基于视觉的防护装置（VBPD）的设备的特殊要求.使用立体视觉技术（VBPDST）的附加要求

[中文适用范围]： 本文件规定了专门设计用于检测人员或人员身体部位的、基于立体视觉技术（VBPDST）的基于视觉的防护装置（VBPD）的非接触式光敏防护设备（ESPE）的设计、制造和测试要求。特别关注确保实现适当的与安全相关的性能的功能。 ESPE可包括可选的安全相关功能，其要求见IEC 61496-1:2020和本文件的附件A。 注意：“非接触式”意味着传感不需要物理接触。 如本文件未包含所有必要的条款，则适用IEC TS 62998-1。对于本文件未考虑的那些方面，也可以额外使用IEC TS 62998-1的条款。 本文件未规定检测区域及其相对于机器危险部分的尺寸或配置，也未规定构成机器任何危险状态的因素。它仅限于ESPE的功能及其与机器的接口。 检测原理是基于对不同视角（立体视图）的图像进行评估以确定距离信息。利用该距离信息确定物体（s）的位置。 本文件仅限于具有以下特征的基于视觉的ESPE：固定距离（立体基线）、固定光轴方向以及固定焦距。 本文件仅限于不需要人工干预即可进行检测的基于视觉的ESPE。 本文件仅限于检测物体进入检测区域或存在于检测区域中的基于视觉的ESPE。 本文件仅限于使用波长在400 nm至1 500 nm范围内的辐射的VBPDST。 本文件未涉及检测到的对象的复杂分类或区分所需的方面。 本文件未考虑移动ESPE安装方面的内容。 以下情况可能适用额外的要求和测试： 多光谱（彩色）技术的使用； 与图2和图3所示不同的设置（例如，背景变化、光轴相对于地面的水平方向）； 户外应用。 本文件适用于检测能力声明值高达200 mm的VBPDST。 本文件可能适用于除保护人员或人员身体部位（如手臂或手指，范围在14 mm至200 mm）以外的应用，例如保护机器或产品免受机械损坏。在这些应用中，可能需要额外的要求，例如当传感功能要识别的材料与人员具有不同属性时。 本文件不涉及电磁兼容（EMC）发射要求。 [外文原描述]： IEC TS 61496-4-3:2022 specifies requirements for the design, construction and testing of non-contact electro-sensitive protective equipment (ESPE) designed specifically to detect persons or parts of persons as part of a safety-related system, employing vision-based protective devices (VBPDs) using stereo vision techniques (VBPDST) 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, 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. The detection principle is based on the evaluation of images from different viewing points (stereoscopic view) for the determination of distance information. This distance information is used to determine the position of an object(s). – This document is limited to vision based ESPEs with fixed distances (stereo base) and fixed directions of the optical axes using a fixed focal length. – It is limited to vision based ESPEs that do not require human intervention for detection. – It is limited to vision based ESPEs that detect objects entering into or being present in a detection zone(s). – It is limited to VBPDSTs employing radiation at wavelengths within 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 does not consider the aspects of a moving ESPE installation. Additional requirements and tests can apply in the following cases: – Use of multi-spectral (colour) techniques; – Setups other than as shown in Figure 2 and Figure 3 (e.g. changing backgrounds, horizontal orientation of the optical axis with respect to the floor); – Intended for outdoor applications. This document is relevant for VBPDSTs having a stated detection capability up to 200 mm. This document can be relevant to applications other than those for the protection of persons or parts of persons like arm or fingers (in the range 14 mm to 200 mm), for example the protection of machinery or products from mechanical damage. In those applications, additional requirements can be necessary, for example when the materials that are to be recognized by the sensing function have different properties from those of persons. This document does not deal with EMC emission requirements. IEC TS 61496-4-3:2022 cancels and replaces the first edition published in 2015-05. 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 Light sources or Clause A.9).