Development and Validation of Fiber Bragg Grating Sensing Pad for Interface Pressure Measurements Within Prosthetic Sockets

Al-Fakih, Ebrahim A.; Osman, Noor Azuan Abu; Adikan, Faisal Rafiq Mahamd; Eshraghi, Arezoo; Jahanshahi, Peyman

doi:10.1109/jsen.2015.2495323

Cited by 49 publications

(31 citation statements)

References 23 publications

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“…Recently, researchers introduced the optical FBG sensors as a potential alternative to the commercial F-socket system for pressure measurement at the residual limb-socket interface of below-knee prosthetic sockets. 8 The prominent advantages of this technology are linearity, high accuracy and sensitivity, small size, negligible drift, mutiplexability, and immunity to the EMIs. [9][10][11] Al-Fakih et al implemented the first investigation into the potential use of FBG sensors in prosthetic applications.…”

Section: Introductionmentioning

confidence: 99%

“…The same researchers further studied the repeatability of FBG sensors and found that the pressure values remained quite consistent during 15 repeated gait cycles, implying that the FBG sensors yielded accurate and consistent signals with no drift. 8 This can possibly make them superior to the previous techniques. In addition, expandable FBG sensing pads were fabricated to measure interface pressures at eight subregions on the residual limb of an amputee, and the results were compared with F-socket mats for validation purposes, revealing that FBGs could successfully measure these interface pressures.…”

Section: Introductionmentioning

confidence: 99%

“…The interface peak pressures at 12 subregions of the residual limb during a complete gait cycle using FBG sensing liner and F-socket transducers.Journal of Biomedical Optics 087001-7 August 2017 • Vol. 22(8) …”

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confidence: 99%

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Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

et al. 2017

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This paper presents a fiber Bragg grating (FBG)-instrumented prosthetic silicone liner that provides cushioning for the residual limb and can successfully measure interface pressures inside prosthetic sockets of lower-limb amputees in a simple and practical means of sensing. The liner is made of two silicone layers between which 12 FBG sensors were embedded at locations of clinical interest. The sensors were then calibrated using a custom calibration platform that mimics a real-life situation. Afterward, a custom gait simulating machine was built to test the liner performance during an amputee's simulated gait. To validate the findings, the results were compared to those obtained by the commonly used F-socket mats. As the statistical findings reveal, both pressure mapping methods measured the interface pressure in a consistent way, with no significant difference (P-values ≥0.05). This pressure mapping technique in the form of a prosthetic liner will allow prosthetics professionals to quickly and accurately create an overall picture of the interface pressure distribution inside sockets in research and clinical settings, thereby improving the socket fit and amputee's satisfaction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

et al. 2017

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“…Not only silica optical fiber sensors but also polymer optical fibers (POF) sensors are widely used in different sensing applications. Several fiber sensor designs based on FBG have been reported for various applications, such as liquid level monitoring [13], transverse force sensing [14], concentration measurement [15], biomedical measurement [16,17], pressure [18][19][20], displacement [21,22], temperature [23,24], and ground vibration [25]. An FBG is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others.…”

Section: Introductionmentioning

confidence: 99%

Design and Testing of a 2D Optical Fiber Sensor for Building Tilt Monitoring Based on Fiber Bragg Gratings

Chao

Liang

2017

ASI

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Abstract:In this paper, a new type of optical fiber tilt sensor based on fiber Bragg grating (FBG) is presented for 2D dual-axis tilt angle sensing. The tilt sensor is composed of two cylindrical floats suspended in water, connected with FBG. When the external environment causes the tilting of the sensor, the surface of the liquid within the container will form a new balanced liquid surface plane due to the gravity and change the height of the liquid at different locations in the container. So the buoyancy force of the cylindrical floats of the sensor will vary with the depth of liquid, thus the changed FBG strain will cause the FBG reflection central wavelength shift. According to the measured central wavelength shift by the optical spectral analyzer (OSA), we can obtain the two-axis tilt angle of the sensor. The proposed sensor can detect a tilt angle range of −5 degrees to +5 degrees and achieve a sensitivity of 0.1 • with optical spectrum analyzer resolution of 0.01 nm. Due to its good sensing linearity, the proposed sensor can be applied in building tilt measurement.

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“…It can be used in a variety of harsh environments and under high electric field strength to do environmental monitoring. Several fiber sensor designs based on fiber Bragg gratings (FBGs) for various applications have been reported, such as biomedical measurements [19,27], pressure [28,29,30], displacement [31,32], temperature [33,34,35], tilt [36,37] and ground vibration [38]. In this paper, we propose a fiber-optic sensor based on FBGs to detect plantar pressure.…”

Section: Introductionmentioning

confidence: 99%

Plantar Pressure Detection with Fiber Bragg Gratings Sensing System

Liang

Lin

Guo

2016

Sensors

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In this paper, a novel fiber-optic sensing system based on fiber Bragg gratings (FBGs) to measure foot plantar pressure is proposed. This study first explores the Pedar-X insole foot pressure types of the adult-size chart and then defines six measurement areas to effectively identify four foot types: neutral foot, cavus foot, supinated foot and flat foot. The plantar pressure signals are detected by only six FBGs, which are embedded in silicone rubber. The performance of the fiber optic sensing is examined and compared with a digital pressure plate of i-Step P1000 with 1024 barometric sensors. In the experiment, there are 11 participants with different foot types to participate in the test. The Pearson correlation coefficient, which is determined from the measured results of the homemade fiber-optic plantar pressure system and i-Step P1000 plantar pressure plate, reaches up to 0.671 (p < 0.01). According to the measured results from the plantar pressure data, the proposed fiber optic sensing system can successfully identify the four different foot types. Measurements of this study have demonstrated the feasibility of the proposed system so that it can be an alternative for plantar pressure detection systems.

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Development and Validation of Fiber Bragg Grating Sensing Pad for Interface Pressure Measurements Within Prosthetic Sockets

Cited by 49 publications

References 23 publications

Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

Optical fiber Bragg grating-instrumented silicone liner for interface pressure measurement within prosthetic sockets of lower-limb amputees

Design and Testing of a 2D Optical Fiber Sensor for Building Tilt Monitoring Based on Fiber Bragg Gratings

Plantar Pressure Detection with Fiber Bragg Gratings Sensing System

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