High Capacity Torque and Compression Measurements Using Fibre Optic Sensors

Hoehn, Karsten; Olsson, Anders; Arkwright, John W.

doi:10.1109/ofsis.2017.18

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Ref. [34] noted that "modern dynamic torque sensor operating principles are based mainly on strain gauges [35], acoustic interference [36,37], the effects of magnetic permeability and resistance [38,39], and optical polarization [39,40]". It was noted that "existing technologies fail to satisfactorily solve the problem of connecting to a rotating sensing element, especially for transient conditions".…”

Section: Specifics Of Known Elastic Torque Monitoring Systemsmentioning

confidence: 99%

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Voronin,

Loginov,

Gasiyarova

et al. 2024

JMMP

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This article outlines the relevance of building online telemetry systems for online monitoring of the technical conditions of rolling mill equipment. Electromechanical systems of the horizontal stand of the plate Mill 5000 are described, when operating in harsh conditions caused by the shock loading when workpieces enter the stand. It is noted that dynamic torque overloads, exceeding the rated motor torque by many-fold, cause the fatigue failure of spindle joints and breakage of rolls. In this regard, the development and implementation of systems for monitoring the elastic torque on spindles are extremely urgent. This issue has long been studied, but the references provide no information on the building principles and hardware composition of such systems. The use of strain gauges connected according to a balanced bridge circuit to measure the elastic torque is justified. This paper’s contribution is the proposed modular principle for building a telemetry monitoring system based on the analysis of known techniques for measuring and transmitting diagnostic data. The developed system structure is provided and the concept of data transfer and processing are explained. This article suggests the inductive power supply of a measuring unit mounted on a shaft without the use of batteries. A hardware structure was developed to be applied in a system for measuring, transmitting, and visualizing signals proportional to the elastic torque, manufactured on the basis of data measuring instruments by leading companies. The specifics of placement and connection of strain gauges are considered. The hardware providing a wireless power supply to the signal encoder and digital data transfer between the transmitter and receiver is described. The results of implementing the system on Mill 5000 are provided. The installation of a telemetry ring and a receiving head for the inductive power supply and data reception is shown. An experimental assessment of the elastic torques occurring when workpieces enter the cage was obtained by implementing a drive control algorithm which provided biting in the drive acceleration mode. The reliability of measuring the elastic torque with an error not exceeding ±5% and the reduction of dynamic loads on the spindle by 1.3–1.5 times due to the elimination of impacts from closing angular gaps in spindle joints was confirmed. This increases the service life of mechanical equipment and reduces the cost of eliminating the accident aftermath. The prospect of modifying the developed system into a cyber-physical system for monitoring the rolling mill’s mechatronic equipment conditions is shown.

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Section: Specifics Of Known Elastic Torque Monitoring Systemsmentioning

confidence: 99%

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Voronin,

Loginov,

Gasiyarova

et al. 2024

JMMP

View full text Add to dashboard Cite

show abstract

“…Figure 26 shows a schematic diagram of compression (P) and torque (M) measurements based on two orthogonal FBG sensors (S 1 and S 2 ) around the drilling rod. This instrumented drilling rod has been tested under a controlled environment for various torque and compression conditions [161]. Further improvement in installation and test of the sensors on a fullsize coil tubing drill rig is required before the system can be industrialised.…”

Section: Mining Industrymentioning

confidence: 99%

“…Operating principle of FBG[71] An overview of distributed sensing based on backscattered light[88] Possible geometrical configurations of fibres for FOSSs (r bundle is radius between fibre cores)[18] Helically wrapped single FBG sensors used for the curvature-strain model[104] Demonstration of a four core helical MCF (a) Scanning electron microscope (SEM) image of the fibre tip with red lines added to show the angles between the cores, (b) Illustration of helical cores along the length of the fibre (c) Strain response of cores to change in external curvature (core 0 is on neutral axis) [5] (a) Reel to reel continuous FBG fabrication setup, (b) SEM image of MCF end, (c) Continuous gratings in twisted MCF with UV transparent coating [65] MCF shape sensor array assembly and its components [90] (a) Schematic diagram of a low-loss light coupling from seven SSMFs into a 7-core MCF using a TFB fan-out. SEM images of TFB and MCF [90], (b) Schematic diagram of inscription of an integrated-optic waveguide using a focused femtosecond laser beam for SSMFs to a MCF fan-out [(a) Cladding waveguides in a single fibre, (b) 3D FOSS fibre with CWGs at a bending radius of 2.5 cm[115] A pair of orthogonal tilted FBGs for 3D shape sensing[118] Da-Vinci surgical system (modified from[141]) Various types of continuum robots that require shape sensors to solve the main implementation challenge in their control of actuation systems[142] Position error due to a flexible robotic link (modified from[145]) Advancement of robotics from discrete towards continuum robots[142] Fibre optic shape sensing of a flexible structure (a) A simple U-shaped path fibre attachment, (b) Vertical (X-Z) plane views of shape measurement data (blue line) and actual surface height [A 50 metre FOSS tether prototype installed on NASA JPL's Axel Rover[132] (a) Schematic diagrams of the fibre optic compression sensor (b) Instrumented drilling rod with optical fibres and under test for torque and compression measurement[161] …”

mentioning

confidence: 99%

Recent developments in fibre optic shape sensing

et al. 2018

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This paper presents a comprehensive critical review of technologies used in the development of fibre optic shape sensors (FOSSs). Their operation is based on multi-dimensional bend measurements using a series of fibre optic sensors. Optical fibre sensors have experienced tremendous growth from simple bend sensors in 1980s to full three-dimensional FOSSs using multicore fibres in recent years. Following a short review of conventional contact-based shape sensor technologies, the evolution trend and sensing principles of FOSSs are presented. This paper identifies the major optical fibre technologies used for shape sensing and provides an account of the challenges and emerging applications of FOSSs in various industries such as medical robotics, industrial robotics, aerospace and mining industry.

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“…ISTRIBUTED shape sensing (DSS) is becoming a hot area of distributed optical fiber sensing [1], which has been applied to fields such as medical robotics [2], industrial robotics [3], aerospace [4,5], mining industry [6,7] and so on. Distributed and quasi-distributed optical fiber sensing (DOFS and QDOFS) can achieve directional strain measurements.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Large Curvature Radius Shape Sensing Using Optical Frequency Domain Reflectometry in Multi-Core Fibers

et al. 2021

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In distributed shape sensing, the shape reconstruction error is more and more sensitive to the strain measuring error along with curvature radius of reconstructed shape increasing, which causes a notable challenge for large curvature radius shape reconstructing. In this paper, we demonstrate a large curvature radius shape sensing using optical frequency domain reflectometry (OFDR) in multi-core fibers. We construct a theoretical model of strain measuring error and curvature radius reconstructing errors under different curvature radius. In the experiment, by this reconstructing error model, we optimally select the measurable strain resolution and the sensing spatial resolution to realize the shape reconstruction with a large curvature radius and reconstruct two-dimensional (2D) circle shapes of curvature radii from 5 cm to 100 cm. To verify the accuracy of three-dimensional (3D) shape reconstruction, we present a 3D shape sensing validation method based on 3D printing technology. We fabricate a 3D phantom containing a groove with a variable curvature radius of 5 cm to 100 cm. The presented distributed shape sensing system realize to reconstruct this complicated 3D shape. The root-mean-square error of curvature radius between the reconstructed and designed 3D space curves is 7.2 mm and the mean Euclidean distance is 3.4 mm.

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High Capacity Torque and Compression Measurements Using Fibre Optic Sensors

Cited by 7 publications

References 2 publications

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Telemetry System to Monitor Elastic Torque on Rolling Stand Spindles

Recent developments in fibre optic shape sensing

Demonstration of Large Curvature Radius Shape Sensing Using Optical Frequency Domain Reflectometry in Multi-Core Fibers

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