Distance measuring optoelectronic safety sensor and method of monitoring a monitored zone
US-8933593-B2 · Jan 13, 2015 · US
Method and apparatus for projective volume monitoring
US9532011B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9532011-B2 |
| Application number | US-201213541399-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2012 |
| Priority date | Jul 5, 2011 |
| Publication date | Dec 27, 2016 |
| Grant date | Dec 27, 2016 |
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Abstract
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According to one aspect of the teachings presented herein, a machine vision system includes one or more sensor units that are each advantageously configured to use different pairings among a set of spaced-apart image sensors, to provide redundant object detection for a primary monitoring zone, while simultaneously providing for the detection of objects that may shadow the primary monitoring zone. Further, a plurality of “mitigations” and enhancements provide safety-of-design and robust operation. Such mitigations and enhancements include, for example, bad-pixel detection and mapping, cluster-based pixel processing for improved object detection, test-image injection for fault detection, dual-channel, redundant processing for safety-critical object detection, temporal filtering to reduce false detections, and the use of high dynamic range (HDR) images, for improved operation over variable ambient lighting conditions.
First claim
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What is claimed is: 1. A projective volume monitoring apparatus comprising a sensing unit that includes: four image sensors having respective sensor fields-of-view that all overlap a primary monitoring zone and arranged so that first and second image sensors form a first primary-baseline pair whose spacing defines a first primary baseline, third and fourth image sensors form a second primary-baseline pair whose spacing defines a second primary baseline, and further arranged so tha…
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- What does patent US9532011B2 cover?
- According to one aspect of the teachings presented herein, a machine vision system includes one or more sensor units that are each advantageously configured to use different pairings among a set of spaced-apart image sensors, to provide redundant object detection for a primary monitoring zone, while simultaneously providing for the detection of objects that may shadow the primary monitoring zon…
- Who is the assignee on this patent?
- Drinkard John, Tyagi Ambrish, Tani Yoshiharu, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G06T7/70. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 27 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).