Design of micro bending deformer for optical fiber weight sensor

Abstract

idAbstract. The road damage due to excessive load is one of the causes of accidents on the road. A device to measure weight of the passing vehicles needs to be planted in the road structure. Thus, a weight sensor for the passing vehicles is required. In this study, we designed a weight sensor for a static load based on a power loss due to a micro bending on the optical fiber flanked on a board. The following main components are used i.e. LED 1310 nm as a light source, a multimode fiber optic as a transmission media and a power meter for measuring power loss. This works focuses on obtaining a suitable deformer design for weight sensor. Experimental results show that deformer design with 1.5 mm single side has level of accuracy as 4.32% while the design with 1.5 mm double side has level of accuracy as 98.77%. Increasing deformer length to 2.5 mm gives 71.18% level of accuracy for single side, and 76.94% level of accuracy for double side. Micro bending design with 1.5 mm double side has a high sensitivity and it is also capable of measuring load up to 100 kg. The sensor designed has been tested for measuring the weight of motor cycle, and it can be upgraded for measuring heavy vehicles.

Design and Operation of Optical Fiber for Mass Measuring Instrument with Bending Power Loss Principle

“…Meanwhile, at 1550nm, it was achieved at 1,900g and this was related to the balance state of the mass at the upper and lower curved cylinders. In this case, despite the continuous increase in the mass scale, significant power losses were not produced because there was no further bending of the optical fiber [18]. However, there were no significant changes in the power losses for the results obtained for masses under 500g due to the lack of variations in the refractive index because the optical fiber had not experienced optical strain.…”

Internet Photonic Sensing: Using Internet Fiber Optics for Vibration Measurement and Monitoring

“…The bend test showed no optical signal attenuation until the bend radius was reduced to a critical value of 0.5 cm. While microbending is generally undesirable in fiber-optic communications [21], the effect has also been the basis for designing strain sensors [22], [23]. One way to test the hypothesis that optical signal attenuation resulted from microbending damage is to use fiber stripped of its jacket.…”

Analisis Perhitungan Kerugian Daya Pada Lendutan Serat Optik Dengan Simulasi Matlab

“…Lambda (Λ) juga dapat diterjemahkan sebagai periodisitas [24], yaitu lekukan yang terbentuk secara periodik diakibatkan ketidakrataan kontur lingkungan yang membuat serat optik terdeformasi membentuk seperti gelombang dengan panjang tertentu.…”