Machine Perception – Scanning Eye Providing Robot Sight

Robots must be equipped with sensors and software for three-dimensional vision in order to gain a spatial understanding of and precisely control objects in their environment. For more than ten years, a research team at the Fraunhofer Institute for Photonic Microsystems IPMS in Dresden has been developing and manufacturing micro-scanner mirrors, known as MEMS scanners, which provide robots an ability similar to human vision needed to perceive objects and perform demanding tasks. Fraunhofer IPMS will present its latest developments to a wide audience at the annual Laser World of Photonics show in Munich, June 24 to 27.

In the 17th century, the time of Isaac Newton, some scientists believed human sight required our eyes to generate and transmit light themselves. Since then, we have learned that we merely receive and interpret reflected light to see the world around us.

For a reliable spatial understanding of their production environment robots must be equipped with sensors and software for three-dimensional vision. (Source: Fh. IPMS)

Fraunhofer IPMS continues to pursue the approach of a so-called scanning eye to support three-dimensional machine vision. For years, the research institute has been developing and manufacturing MEMS scanner mirrors, used for the targeted deflection of light in applications helpful in industry, the medical field and everyday life. These compact micro-mechanical optical components with an integrated motor are extremely robust and reliable. Jan Grahmann and his development team can now look back on successful projects with over fifty different component variants.

Current research is focused on design variants for industrial production such as scanner mirrors in automated systems. These mirrors can be installed at the end of a robotic arm, so that the robot is always aware of what is happening in its environment, what steps it has to take and the quality of its work. Grahmann explains: “A scanner mirror module acts as a sort of rastering eye for the robot, which can record high-resolution images in the three spatial axes. Our mirror disperses and detects light from a laser in two dimensions, and simultaneously captures depth as a third dimension by measuring the transit time of light between the object and the detector, also known as lidar, i.e. light detection and ranging.” Developers are confident that production equipment or vehicles equipped with their scanning technology can gain the reliable understanding of their environment needed in order to interact with objects in it.

Fraunhofer researchers tell us that applications for environmental analysis can be further extended by introducing a broadband light source. According to Grahmann, “Tunable light sources enable completely new applications, as solid, liquid or gaseous substances can be detected by spectral information. Here, it is crucial that a light reflex is locally captured, and, in addition, the reflection characteristics of different substances are recorded and analyzed.” This application can be applied to monitoring pollutants in drinking water and controlling quality in the field of pharmacy, as well as in the remote monitoring of industrial plants to find leakage in pipelines or detect risk of explosion. As a result, Fraunhofer IPMS developments facilitate a new way of acquiring environmental data to make plants safer and protect personnel from contact with hazardous substances.

Fraunhofer IPMS services range from product conception and development to pilot series production – from the component to the complete system solution. Visitors can learn more about the latest developments at the 2019 Laser World of Photonics show in Munich, June 24 to 27. The exhibition featuring several system demonstrators can be found at the collective Fraunhofer society stand number 335 in Hall B3. (Source: Fraunhofer IPMS)

Link: https://www.ipms.fraunhofer.de/de/research-development/mems-scanners.html

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