Enlargement of a force sensor measurement range based on a build-up principle

Document Type : Research articles

Authors

1 National Institute of Standards (NIS), Giza, Egypt

2 Shoubra Faculty of Engineering, Benha University, Cairo, Egypt

Abstract

This paper introduces a full study to extend the capacity of a force sensor to three times its original capacity based
on the build-up principle. The force sensors that have good metrological characteristics are costly devices. Such
devices could fail as soon as the load exceeds its designed capacity. For covering a wide force measurement range,
several force sensors shall be available. The systems that are designed to work over a wide force measurement range
such as the system under study are a good replacement for many force sensors. It is expected that using a build-up
system based on a single-active force sensor will be an advantage from the cost point of view. The metrological
validation of the system was proved through analyzing experimental results, which are obtained during the test of a
single-active sensor build-up system. The system achieves class 1 according to ISO376:2011. Further, as an excess
step for the validation of the system under study, the new system based on a single-active force signal was used as
a reference to calibrate a 2500 N force measurement sensor. It is found that the maximum measurement error is
about 0.23 %.

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