A Temperature Sensor Based on a Polymer Optical  Fiber Macro-Bend

Tapetado, A.; García, Carmen Vázquez; Zaballa, Joseba Zubía; Arrué, J.

doi:10.3390/s131013076

Cited by 81 publications

(57 citation statements)

References 25 publications

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“…A common compensation technique is based on a reference fiber that remains on a static position during the measurement. For this purpose, Bilro et al (2011) and Moraleda et al (2013) proposed the use of a reference fiber in the same direction of the POF sensor. Such solution may not be suitable for wearable applications, since this reference fiber may move or bend with the POF sensor, presenting signal attenuations that could result in measurement errors.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, the reference fiber signal has low intensity due to reflection losses. Bilro et al (2011) and Moraleda et al (2013) employed a self-referencing system, which lowers the source power deviations to acceptable values. This system comprises of a sensor fiber and a reference fiber with the same properties as the sensor fiber in a static position.…”

Section: Introductionmentioning

confidence: 99%

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Compensation technique for environmental and light source power variations applied in a polymer optical fiber curvature sensor for wearable devices

Leal‐Junior

Frizera

2018

Res. Biomed. Eng.

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Introduction: Polymer optical fibers (POF) are lightweight, present high elastic strain limits, fracture toughness, flexibility in bend, and are not influenced by electromagnetic fields. These characteristics enable the application of POF as curvature sensor and can overcome the limitations of the conventional technologies, especially for wearable and soft robotics devices. Nevertheless, POF based curvature sensors can suffer from environmental and light source power deviations. This paper presents a compensation technique for the environmental and light source power deviations in a POF curvature sensor. Methods: The curvature sensor was submitted to variations of temperature, humidity and light source power to characterize the sensor response and evaluate the proposed compensation technique. In addition, tests with the simultaneous variation of the angle and light source power variation were performed. Results: Results show that temperature and humidity effects do not lead to significative errors on the sensor measurement for wearable devices application, where a hardware-based compact and portable compensation technique of the light source deviation is applied. Moreover, the sensor with the compensation technique developed is compared with a potentiometer for dynamic measurements and the root-mean-square error of about 1° is obtained, which is lower than sensors based on similar operation principle presented in the literature and some commercially available devices. Conclusions: The compensation technique proposed was able to compensate power deviations applied and resulted in a sensor with low errors with the additional advantages of compactness and low-cost, which enable its application as wearable sensors and on the instrumentation of wearable robots.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compensation technique for environmental and light source power variations applied in a polymer optical fiber curvature sensor for wearable devices

Leal‐Junior

Frizera

2018

Res. Biomed. Eng.

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“…In fact, high signal attenuation limits the polymeric optical fiber (POF) applications to short distance communication, compact light sources and optical sensors [5,6]. There are reported numerous constructions of POFs based optical sensors for liquids and gasses monitoring [7][8][9][10]. In addition, the possibility of incorporation of luminescent dopants significantly extends the application field of optical fiber devices [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Luminescent Properties of Oxazine 170 Perchlorate Doped PMMA Fiber

Miluski

2017

Fibers

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Abstract:The article presents fabrication and luminescent properties of poly(methyl methacrylate) (PMMA) fiber doped by Oxazine 170 perchlorate. The bright fluorescence of polymeric fiber (at molar fluorescent organic dye concentration 4.3 × 10 −5 ) was characterized in terms of spectrum and signal attenuation vs. the fiber length. The significant changes in fluorescence spectrum (λ max red shift average slope 4.6 nm/cm and Full Width at Half Maximum (FWHM) increasing slope 6.7 nm/cm) have been noticed for the length of the fiber (0.02-0.08 m) which corresponds to a high overlapping region of absorption and emission spectra of used dye. The red shift of λ max (c.a. 80 nm) was presented in fabricated polymeric fiber at distance 0.85 m. The obtained characteristics can be used for luminescent properties optimization of fluorescent organic-dye-doped PMMA fiber.

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“…Temperature amplitude modulation sensors are based on optical power variations. Some proposed sensors are based on frustration of total internal reflection [4], light generation [5] and Fiber Bragg Grating wavelengths shifts [6]. The amplitude temperature sensors usually are cheaper than the phase modulation sensors but they need to use a reference technique to avoid false readings caused by fluctuations of the light source or other undesired losses [7].…”

Section: Introductionmentioning

confidence: 99%

“…The sensor system used a relation between two different wavelengths to avoid possible errors related to optical power fluctuations of the light. Previous POF macrobend temperature sensor as the one reported in [4] used a dummy fiber-optic sensor, making them less reproducible.…”

Section: Introductionmentioning

confidence: 99%