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License for a force lever system for precise measurement of torques under multi-component loads

Country of Origin: Germany
Reference Number: TODE20180403003
Publication Date: 3 April 2018

Summary

A German research institute has developed a system for precise measurement of torques under multi-component loads. The traceable measurement of torques greater than 2MN∙m is of enormous importance (e.g. the wind energy industry). The invention enables feedback by splitting the torque into several force signals, measured over a defined lever length and an exact method with a measurement uncertainty of at most 1%. The institute looks for licensees and partners for research cooperations.

Description

A German research institute active in metrology in Germany has developed a system which enables precise measurement of torques under multi-component loads. The traceable measurement of torques greater than 2MNm, for example, gains currently importance due to the growth of the wind energy industry and its plants. The new invention enables feedback by splitting the torque into several force signals which are measured over a defined lever length. In addition, the torque sensor is able to decouple most interference components. This results in an exact method with a measurement uncertainty of at most 1%.

Internationally, nacelle test benches have already been realized which, however, have no feedback for their torque measurement in the MN∙m range. This leads to an unfavourable measurement uncertainty of over 5%. The offered invention addresses this handicap by breaking down the torque into its components of force and length. The force sensors are mounted on both sides of an abutment at a certain distance and the abutments on one side are connected via a flange (which you can see in the picture). In this way, the total transducer can also be included in a test stand as a transfer standard. To stabilize and reduce the interference components, both flange sides are additionally connected with struts. The special design prevents the effect of lateral forces or bending moments, as they occur in nacelle test benches, and thus makes the measurement more precise. Optional force measurements on the struts and multicomponent measurements on the main force transducers make it possible to determine further mechanical loads on the system.

Economic Significance

The improvement of torque measurement leads to a improved determination and better test conditions through more precise control. This drives the development of wind power nacelles and large drive trains. The invention could also be installed in torque measuring equipment for test laboratories worldwide.
The institute looks for licensees and partners for research cooperations, interested in the commercial use of the system as licensee. The research institute has developed the system to satisfy own internal measurement tasks. If necessary the institute offers research cooperations of the lab tested system.
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Advantages and Innovations

The offered system offers several advantages compared with state of the art test benches:
- The decoupled design prevents interference due to lateral forces or bending moments
- An improved measuring uncertainty of maximum 1%
- A traceable measuring chain

Stage Of Development

Under development/lab tested

Requested partner

Targeted partners are either active in the development of measurement equipment for torque measurements for test laboratories worldwide or run test laboratories for of wind power nacelles and large drive trains.
The institute looks for licensees and partners for research cooperations, interested in the commercial use of the system as licensee. The research institute has developed the system to satisfy own internal measurement tasks. If necessary the institute offers research cooperations of the lab tested system.

Cooperation offer ist closed for requests