scholarly journals Magnetic fields influence on sensors with electrical output under sinusoidal excitations

ACTA IMEKO ◽  
2016 ◽  
Vol 5 (1) ◽  
pp. 51 ◽  
Author(s):  
Nieves Medina ◽  
Jesús De Vicente ◽  
Jorge Robles
Keyword(s):  
Magnetic Fields ◽  
Primary Standard ◽  
Dynamic Force ◽  
Magnetic Effects ◽  
Force Transducers ◽  
Electrodynamic Shaker ◽  
Force Calibration ◽  
Electrical Output

This paper describes the magnetic effects studied at CEM in their realization of a primary standard for dynamic force calibration using sinusoidal excitations of force transducers, although they can also affect any sensor with an electrical output mounted on an electrodynamic shaker. In this study the electromagnetic behaviour for the interaction between sensor and shaker or a similar source of magnetic fields is explained and a solution to minimise this interaction is also included.

Impact Mechanics Parametric Studies With Applications to Dynamic Force Calibration

2017 ◽  
Author(s):  
Nicholas Vlajic ◽  
Ako Chijioke
Keyword(s):  
Force Transducer ◽  
Reduced Order Model ◽  
Dynamic Force ◽  
Order Model ◽  
Reduced Order ◽  
Force Transducers ◽  
National Measurement ◽  
Parametric Studies ◽  
Force Calibration ◽  
Impact Events

National Measurement Institutions have developed apparatuses that rely on impacting bodies to realize time-varying forces for dynamic calibration of force transducers. Within this manuscript, we present a reduced-order model to investigate the effects of structural and contact parameters on determining the frequency-dependent calibration function of the force transducer that is to be calibrated. The reduced-order model is validated with experimental measurements and is used to conduct parametric studies, wherein regions of single impact events and contact time are mapped out in parameter space. Although this study has been conducted with dynamic force calibrations in mind, the results presented here are of broader relevance to modal analysis and system identification.

Development and commissioning of FBG sensors for impact test of rock fall protective barrier

Sensor Review ◽  
2014 ◽  
Vol 34 (4) ◽  
pp. 343-348 ◽  
Author(s):  
Yongxing Guo ◽  
Dongsheng Zhang ◽  
Zude Zhou ◽  
Fangdong Zhu ◽  
Li Xiong
Keyword(s):  
Real Time ◽  
Detection System ◽  
Field Application ◽  
Elastic Structure ◽  
Dynamic Force ◽  
Optimized Design ◽  
Element Analysis ◽  
Content Type ◽  
Protective Barrier ◽  
Force Transducers

Purpose – This paper aims to present an effective sensing detection system based on fiber Bragg grating (FBG) sensing technology for protective barriers that have been effectively applied to intercept and stop rocks from falling onto railway tracks. . Determination of exact stress and deformation values during impact tests for key components of the protective barrier forms important criteria for quality control of these barriers. Monitoring changes in force along the protective barrier when deployed in field application allows for real-time disaster warning for collapse and falling rocks. Design/methodology/approach – In this paper, we propose a monitoring strategy for key components of a protective barrier. During performance tests, dynamic force and strain were measured for the steel strands and supporting I-beam, respectively. Design of a special elastic structure for the force transducer based on finite element analysis and tensile tests has been discussed here. Two types of FBG force transducers were manufactured based on the elastic structure. Four FBG force transducers and four FBG strain sensors were used for impact verification testing of a new rigid protective barrier with a design protection level of 25 KJ. Findings – Dynamic force and strain responses were obtained during an impact of free-falling block with a kinetic energy of 25 KJ. Originality/value – The FBG monitoring scheme can be extremely valuable for optimized design of the barrier and can provide real-time disaster warning in regions of collapse and falling rocks.

scholarly journals Calibration of cyclic force with inertial force correction to a fatigue testing machine

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 124
Author(s):  
Feng Tian ◽  
Xiao Yin ◽  
Bo Li
Keyword(s):  
Test Piece ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Inertial Force ◽  
Correction Method ◽  
Dynamic Force ◽  
Static Force ◽  
The Real ◽  
Force Calibration

The accuracy between a dynamic force and a static force applied on a specimen by a fatigue machine is usually not the same. By establishing physical vibration models of fatigue machines, it is concluded that the error of a cyclic force is mainly caused by the inertial force of the vibration mass between the machine sensor and the specimen. After the inertial force is exactly corrected, the force displayed on the machine would be consistent with the real force on the specimen. A standard dynamic force calibration sensor (DFCS) with an inertial force correction method has been used to do calibration of fatigue testing machines in this paper. Compared with the replica test-piece method, the two calibration results are close to each other.

Improvement of Software for Dynamic Force Correction of Force Transducers

2014 ◽  
Vol 2 (4) ◽  
pp. 131-136
Author(s):  
Naoki Miyashita ◽  
Ryosuke Araki ◽  
Akihiro Takita ◽  
Takao Yamaguchi ◽  
Agus Setyo Budi ◽  
...  
Keyword(s):  
Dynamic Force ◽  
Force Transducers
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