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BSI PD IEC TS 61496-4-3:2022:2023 Edition

BSI PD IEC TS 61496-4-3:2022:2023 Edition

$198.66

Safety of machinery. Electro-sensitive protective equipment – Particular requirements for equipment using vision based protective devices (VBPD). Additional requirements when using stereo vision techniques (VBPDST)

Published By Publication Date Number of Pages
BSI 2023 66
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 Blank Page
5 CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope
11 2 Normative references
3 Terms and definitions
12 Figures
Figure 1 – Image planes in imaging device of a VBPDST
15 4 Functional, design and environmental requirements
Figure 2 – 3D view of a vision based protective device using stereo vision techniques (VBPDST)
16 Figure 3 – 2D view of a vision based protective device using stereo vision techniques (VBPDST)
24 5 Testing
26 Tables
Table 431 – Verification of detection capability requirements (see also 4.2.12)
28 Figure 4 – Examples for periodic surface structures on the background
31 Table 432 – Overview of light interference tests
33 Figure 5 – Test setup for indirect light interference on the background
34 Figure 6 – Test setup for VBPDST of identical design with PAPT
35 Figure 7 – Test setup for direct light interference on the sensing device
37 6 Marking for identification and for safe use
7 Accompanying documents
39 Annex A (normative) Optional functions of the ESPE
41 Annex B (normative) Catalogue of single faults affecting the electrical equipmentof the ESPE, to be applied as specified in 5.3
42 Annex AA (informative) The positioning of VBPDST employing a volume as a detection zone in respect of parts of the human body
45 Figure AA.1 – Minimum distance S – Example 1
Figure AA.2 – Overall minimum distance So without tolerance zone – Example 1
46 Figure AA.3 – Overall minimum distance So including tolerance zone – Example 1
47 Figure AA.4 – Minimum distance S – Example 2
48 Figure AA.5 – Overall minimum distance So without tolerance zone – Example 2
Figure AA.6 – Overall minimum distance So including tolerance zone – Example 2
50 Figure AA.7 – Application example for body detectionof a VBPDST employing a volume as a detection zone
51 Annex BB (informative) Relationship between position accuracy and tolerance zones for VBPDST
52 Figure BB.1 – Relationship between test piece position and the probability of detection
53 Figure BB.2 – Example for measurement of the probability of detection
55 Figure BB.3 – Relationship between detection zone and tolerance zone
56 Figure BB.4 – Overall minimum distance So including tolerance zone
57 Annex CC (informative) Basic principles of physics for contras tof convex homogeneous bodies
58 Figure CC.1 – Illumination model – Sphere illuminated by a point source
Figure CC.2 – Illumination model – Sphere illuminated by a half-Ulbricht sphere
59 Figure CC.3 – Brightness of a surface element of a sphere in spherical coordinates
Figure CC.4 – Brightness distribution in an image of a sphere
60 Figure CC.5 – Grey value profile over a sphere with low contrast for a typical imaging contrast (Modulation Transfer Function)
Figure CC.6 – Grey value profile over a sphere with the same colour as the background
61 Figure CC.7 – Grey value profile over a sphere in front of a background that is half as bright
Figure CC.8 – Grey value profile over a sphere in front of a background that is twice as bright
62 Figure CC.9 – Grey value profile over a sphere by low contrast
Figure CC.10 – Grey value profile over the sphere from Figure CC.9 but with the direction to the imaging device changed by 10°
63 Figure CC.11 – Grey value profile over a small sphere that results inan image that is 5 pixels in diameter
64 Bibliography

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