Integrated optical absolute-value encoder and torque analyser

Theme
Industry 4.0
Project title Integrated optical absolute-value encoder and torque analyser (IntegrAD)
Project duration 01.05.2014 – 31.12.2016
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Press release
Although sensors and systems to measure torque such as encoder disks or strain sensors are available, they all have one major drawback since they need to be attached mechanically to the shaft, occupying valuable installation space. Non-contact measurement systems based on magnetic principles are very costly and incompatible. Therefore, the IPH research institute and the Laser Zentrum Hanover (LZH) are developing an optical, laser based system that works without mechanical contact with the possibility to be retrofitted to existing systems. The goal is to achieve a higher resolution than existing systems can provide while at the same time reducing weight and size. The optical sensor will allow non-contact measurements of the position of the shaft while simultaneously measuring the torque applied to it.
  • Sorry, no events available.
  • 14.12.2016
  • IPH – Institut für Integrierte Produktion Hannover gGmbH, Hollerithallee 6, 30419 Hannover
  • 21.06.2016
  • IPH – Institut für Integrierte Produktion Hannover gGmbH, Hollerithallee 6, 30419 Hannover
  • 20.10.2015
  • Brabender GmbH & Co. KG, Kulturstraße 51-55, 47055 Duisburg
  • 23.09.2015
  • VDMA-Haus, Lyoner Straße 18, 60528 Frankfurt am Main
  • 22.04.2015
  • VDMA-Haus, Lyoner Straße 18, 60528 Frankfurt am Main
  • 01.04.2015
  • IPH – Institut für Integrierte Produktion Hannover gGmbH, Hollerithallee 6, 30419 Hannover
  • 21.10.2014
  • LZH – Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover
  • 25.09.2014
  • VDMA-Haus, Lyoner Straße 18, 60528 Frankfurt am Main

Publications about the project

In this article, image processing of a binary single track code for determining torque is presented. The aim of the research is to determine the absolute angular position of a shaft and the applied torque. For capturing an image of the binary code two independent imaging modules are used, both allowing for measuring the angular position and rotational speed. Combining both imaging modules, torque can be determined. Position markings are directly applied on the shaft using a laser to ensure a simple integration of the system into any application. The selected technological approach is based on a contactless measurement method using angle differences. The concept of image processing as well as first research results are presented for determining the angular position twice and, thus, the torque applied to the shaft.

image processing, single track code, torque

In this article, a combined contactless measurement method is presented which is based on angle differences. The aim is the development of a combined, optical measurement system to determine the angular position of a shaft and the applied torque on it as well as an appropriate production technology to apply markings. Two independent modules are used which separately allow the measurement of angular position and rotational speed and if combined can measure torque. To ensure a simple integration of the system into any application, position markings are directly applied on the shaft using a laser. The selected technological approach is based on a contactless measurement method using angle differences. The concept as well as first research results are presented.

absolute angular position, angle difference, contactless combined measurement, sensor, torque

The concept of angular difference allows simultaneous measurement of the relative and absolute rotation angle as well as the torque. The torsion of a shaft resulting from torque gets determined via the difference of two angles and converted into correlating torque. Today’s measuring devices use encoder disks or additional torque shafts. An incremental or absolute structure of measurement of the encoder disks is applied to it. Torque shafts are used frequently to extend the twist angle as a result of torsion. Current methods of measurement for rotation angle and torque are described.

torque, torsion, rotation angle

The concept of angular difference allows simultaneous measurement of the relative and absolute rotation angle as well as the torque. The torsion of a shaft resulting from torque gets determined via the difference of two angles and converted into correlating torque. Today’s measuring devices use encoder disks or additional torque shafts. An incremental or absolute structure of measurement of the encoder disks is applied to it. Torque shafts are used frequently to extend the twist angle as a result of torsion. Current methods of measurement for rotation angle and torque are described.

concept of angular difference, rotation angle, torque

Sponsor

The IGF project 18200 N of the German Research Association for the Application of Microelectronics (DFAM) was funded via the German Federation of Industrial Research Associations (AiF) in the programme of Industrial Collective Research (IGF) by the Federal Ministry for Economic Affairs and Energy (BMWi) based on a decision of the German Bundestag.

Partner

Your contact person

Tobias Schneider
M.Sc.

Project engineer

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