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You are here: Start » News » Precision 10 MN Ring Force Sensor RKS 03 at MPA Institute in Braunschweig ...
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| 24.06.2005 |
Precision 10 MN Ring Force Sensor RKS 03 at MPA Institute in Braunschweig |
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The MPA Braunschweig, Germany, is an independent state institution that performs a wide variety of mechanical, chemical, physical, and electrical testing functions. For a needed precision ring force sensor with a nominal force of 10 MN and an especially low silhouette, it requested proposals from several manufacturers. A sensor with such a nominal force rating and the desired precision is a unique product and requires precise calculation and optimization with high-resolution Finite Element Analysis (FEA) methods. |
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As a result of a favorable price performance ratio the HAEHNE company was awarded the contract for the development and manufacture of the sensor. However, this was a risky undertaking because no suitable test facilities with more than 10 MN compression force rating are available close to the company location near Düsseldorf. However, risk-taking was rewarded. The ring force RKS 03 was analyzed by the MPA for its function as force indicator according to the requirements of DIN EN ISO -7500-1 with their 10 MN compression force facility (equipment class 0.5) . The classification according to EN ISO 7500-1 resulted in the designation as equipment class 1. The classification takes into account the measurement uncertainty and the systematic error of the test facility used as well as the measurement uncertainty during calibrating of the ring force sensor . The MPA Institute emphasizes, however, that it is not accredited for the calibration of force sensors. However, the sensor RKS 03 was accepted without any additional rework.
The picture shows the closed and open ring force sensor optimized according to the compression body design principle. The full bridge strain gauge was split into several bridges of individual strain gauge  elements and distributed on the circumference of the sensor body in order to improve the total precision. This example shows the types of results that can be achieved with todays high-resolution Finite Element Analysis (FEA) methods and a corresponding strain gauge application Know-How. This is in stark contrast to previous practices without FEA methods where several very time consuming optimizing steps were necessary to achieve acceptable results. The Know-How for special solutions of this type has been acquired by the HAEHNE company by developing numerous customized "Measuring Machine Components" --- also for high-temperature applications.
For further information:
Please contact us per email
info@haehne.de
or by phone: +49 211/9259-10
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| Additional product information: |
» RKS02
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