This paper discusses a proposed fiber-optic sensor that was based on the combination of the material called polyethylene terephthalate glycol (PETG) and a fiber Bragg grating (FBG). The practical experiments were conducted under laboratory conditions with a group of 6 volunteers. The data were compared with a conventional electrocardiogram (ECG) and processed using a Bland-Altman method. The results described in this paper show that the 3D printing technique can be used for encapsulating the FBG and for the purpose of biomedical engineering.
The article describes a fiber-optic sensor based on a Bragg grating, which is implemented in oxygen glasses, which are commonly used in real medical practice. The realized experimental fiber-optic sensor can be used to monitor the respiratory activity of the human body over time. The article primarily describes the design improvement of the Bragg grating implementation itself in used conventional oxygen glasses. The practical part also describes the experimental verification of the functionality and the subsequent evaluation of the measured data. The experimental measurement was carried out on a group of 5 volunteers in laboratory conditions.
This article describes the fiber-optic Bragg grating sensor which is encapsulated by using 3D print and polylactic acid material. This FBG sensor is designed for heart rate monitoring of the human body. In this article, we describe the complete process consisting of creating, encapsulating, and experimental verification of the sensor. This sensor we compared with the conventional ECG monitoring system. Measurement was performed with a group of 5 volunteers in the laboratory conditions. The measured data were compared by the Bland-Altman method.
This paper describes the proposal, manufacture, and overall testing of a portable measuring sensor based on the fiber-optic Bragg grating (FBG). The sensor is made of two-component silicone rubber (ZA 50 LT) and can be used to monitor the density of car traffic in cities at a maximum speed of 60 kph in one lane. The construction of the sensor, which is over 2 m long and 1.8 cm wide, contains optical fiber with FBG encapsulated in a carbon tube and allows the detection of individual vehicle axles. Functional verification of the sensor was performed in real traffic on overall 761 vehicles (various types) with a high detection success rate of 97.19 %.
This article describes the research work in search of an optimized solution for the measurement of compressive force using the detection of the intensity of the optical power coupled into the optical fiber. In the experimental part of the research a product realized by 3D printing was used the outer case of which was made of FLEXFILL 98A material and the inner part was formed by a three-part PETG layer while the middle sensory part was changeable. This model was used to test different shapes of deformation elements in the variable part to find suitable configurations of the deformation plate. A standard 50/125 μm multimode graded index optical fiber was placed in the sensory part. It can be assumed that the results of this research can be used for the design of sensors based on the detection of changes in optical power intensity
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