Digital Measuring System for Monitoring Motor Shaft Parameters on Ships

Džapo, Hrvoje; Stare, Zoran; Bobanac, Nenad

doi:10.1109/tim.2009.2019316

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…Practically, the operation principle of all torque meters utilized in shipping is based on above two equations. In case of the Equation (1), the strain is usually measured by a thin foil strain gauge bonded to the shaft surface [9,10]. That technology is used by a number of commercial torque meters providers [11,12,13].…”

Section: Methodsmentioning

confidence: 99%

A Novel Telemetry System for Real Time, Ship Main Propulsion Power Measurement

Bonislawski

Hołub

Borkowski

et al. 2019

Sensors

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Modern ships are required to increase the energy efficiency and minimize fuel consumption. This paper presents the construction, main properties and exemplary measurement results of a novel system intended for main shaft power monitoring. The telemetry system consists of the stationary part, responsible for wireless supply energy transfer to the rotating part. Additional functions of the stationery unit include radio-based, bidirectional communication with the rotating, microcontroller-based unit, and Modbus-based communication with the graphical user interface. The non-stationary (rotating) part receives the necessary energy using the wireless transmission and performs the torque and speed measurement using strain gauge and a special setup of the wireless energy system. A novel system of flexible printed circuit board (PCB) coils is used for wireless energy transmission and increases the flexibility of the device while minimizing the necessary size, weight, and costs of the setup. The microcontroller unit used for measurements allows proper sampling of highly dynamic signals and can be used for advanced drive system diagnostics or as a typical power monitoring device. Such unit was installed on a ferry and operation was monitored for several sea trips. Main results depict characteristic power data referenced to vessel speed and specific fuel oil consumption (SFOC). Proposed system construction allows to reduce system costs and provides stable readings for long period of operation.

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Section: Methodsmentioning

confidence: 99%

A Novel Telemetry System for Real Time, Ship Main Propulsion Power Measurement

Bonislawski

Hołub

Borkowski

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…Measuring the torque in mechanical shafts made of steel is a common challenge found in various industrial applications. Some examples of these applications include marine propulsion systems [ 1 , 2 ], turbine generators [ 3 , 4 , 5 ], robotics [ 6 , 7 , 8 , 9 , 10 ], and automotive [ 11 , 12 , 13 , 14 ] and electromobility applications [ 15 , 16 , 17 ]. Due to the rotation of a mechanical shaft under normal working conditions, powering a typical strain-gauge based torque sensor while collecting data is very challenging [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the rotation of a mechanical shaft under normal working conditions, powering a typical strain-gauge based torque sensor while collecting data is very challenging [ 3 ]. For this reason, the most promising solution from an application point of view after comparing the different types of shaft torque sensors [ 1 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ] is contactless sensors.…”

Section: Introductionmentioning

confidence: 99%

A FEM-Based Optimization Method for Driving Frequency of Contactless Magnetoelastic Torque Sensors in Steel Shafts

et al. 2021

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This paper presents a novel finite element method (FEM) of optimization for driving frequency in magneto-mechanical systems using contactless magnetoelastic torque sensors. The optimization technique is based on the generalization of the axial and shear stress dependence of the magnetic permeability tensor. This generalization creates a new possibility for the determination of the torque dependence of a permeability tensor based on measurements of the axial stress on the magnetization curve. Such a possibility of quantitative description of torque dependence of a magnetic permeability tensor has never before been presented. Results from the FEM-based modeling method were validated against a real magnetoelastic torque sensor. The sensitivity characteristics of the model and the real sensor show a maximum using a driving current of similar frequency. Consequently, the proposed method demonstrates the novel possibility of optimizing magnetoelastic sensors for automotive and industrial applications.

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“…As such, ships increasingly rely on advanced monitoring systems to ensure proper operation of mechanical and electrical systems [3], [4]. These systems range from individual machine sensors measuring motor or generator shaft torque, speed, and vibration [5]- [7], to bulk electrical system measurements for power system state estimation and fault detection [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Shipboard Fault Detection Through Nonintrusive Load Monitoring: A Case Study

et al. 2018

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As crew sizes aboard maritime vessels shrink in efforts to reduce operational costs, ship operators increasingly rely on advanced monitoring systems to ensure proper operation of shipboard equipment. The nonintrusive load monitor (NILM) is an inexpensive, robust, and easy to install system useful for this task. NILMs measure power data at centralized locations in ship electric grids and disaggregate power draws of individual electric loads. This data contains information related to the health of shipboard equipment. We present a NILM-based framework for performing fault detection and isolation (FDI), with a particular emphasis on systems employing closed-loop hysteresis control. Such controllers can mask component faults, eventually leading to damaging system failure. The NILM system uses a neural network (NN) for load disaggregation and calculates operational metrics related to machinery health. We demonstrate the framework's effectiveness using data collected from two NILMs installed aboard a U.S. Coast Guard (USCG) cutter. The NILMs accurately disaggregate loads, and the diagnostic metrics provide easy distinction of several faults in the gray water disposal system. Early detection of such faults prevents costly wear and avoids catastrophic failures.

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Digital Measuring System for Monitoring Motor Shaft Parameters on Ships

Cited by 15 publications

References 15 publications

A Novel Telemetry System for Real Time, Ship Main Propulsion Power Measurement

A Novel Telemetry System for Real Time, Ship Main Propulsion Power Measurement

A FEM-Based Optimization Method for Driving Frequency of Contactless Magnetoelastic Torque Sensors in Steel Shafts

Shipboard Fault Detection Through Nonintrusive Load Monitoring: A Case Study

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