Reference : Dynamic calibration of Flexiforce sensors for ballistic measurements
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Mechanical engineering
Dynamic calibration of Flexiforce sensors for ballistic measurements
[fr] Calibration dynamique des capteurs Flexiforce pour des mesures balistiques
Robbe, Cyril [Ecole Royale Militaire (Belgique) - ERM > Systèmes d'Armes et Balistique > > >]
Papy, Alexandre [Ecole Royale Militaire (Belgique) - ERM > Systèmes d'Armes et Balistique > > >]
Nsiampa Ndompetelo, mailto [Université de Liège - ULg > > > Doct. sc. ingé. (aérosp. & méca. - Bologne)]
Recent Advances in TExtile Composites
Binetruy, Christophe
Boussu, François
DEStech Publications
Texcomp 10 International COnference on Textile Composites
du 26 octobre 2010 au 28 octobre 2010
[en] Balistics ; Flexiforce ; Dynamic calibration
[en] In the field of terminal ballistics, non-invasive force measurements are sometimes needed. The cheap and thin Flexiforce sensors can be used for this purpose with low collateral effects. This paper works on the development of a method designed to dynamically calibrate the Flexiforce sensor. The objective is to find a calibration parameter that correlates the Flexiforce output signal, in terms of conductance, to the applied force. The process used to achieve this dynamic calibration is based on a drop test. The principle is to impact the sensor with the falling of a specified mass. The force signal delivered by the Flexiforce sensor is afterwards compared to the signal measured by a reference force sensor that measures the same impact. To further validate this measurement, the impact is applied on a spring, placed directly between the falling mass and the Flexiforce. The deflection of that spring is measured with a high-speed camera. Knowing the spring properties, we can determine the force produced by the spring on the two sensors, and consequently validate the reference measurement. The calibration factor seems independent of the applied force, and follows a normal distribution. Both the frequency of the impact and the contact surface have an influence on the output of the Flexiforce sensor. For that reason the calibration process should use a frequency and a contact surface similar to the considered application.

File(s) associated to this reference

Fulltext file(s):

Restricted access
Cyril_ROBBE_texcomp10_article.pdfAuthor preprint660.47 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.