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A Highly Integrated Biomedical Pressure-Temperature Sensor
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DOI：10.1109/JSEN.2024.3450672.png)
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The internal pressure of human organs and tissues is a crucial vital sign of humans. Monitoring pressure within the human body requires sensors that meet exacting standards for precision, volume, and biocompatibility. This article proposed a highly integrated biomedical pressure-temperature sensor, leveraging the Fabry-Perot (FP) cavity and fiber Bragg grating (FBG) sensing techniques. The FP cavity was fabricated and length controlled by chemical etching method using multimode optical fiber (MMF). Part of a miniature glass bubble was welded onto the FP cavity, serving as both a diaphragm and a reflector. The entire FP cavity structure was seamlessly integrated with a FBG through electric-arc welding, without extra dissimilar materials. The designed sensor boasts a compact structure, simple manufacturing process, and cost-effectiveness. The experimental results demonstrate its pressure sensitivity of 216.6 pm/kPa within a range of -30 to 50 kPa, and temperature sensitivity of 10.3 pm/degrees C from 20 degrees C to 55 degrees C. The corresponding detection accuracy for pressure and temperature is 0.1 kPa and 0.1 degrees C, respectively. The designed sensor has the potential to be applied to the monitoring of human pressure parameters such as intracranial pressure, intravascular pressure, endotracheal pressure, and so on.
Keyword:
Optical fiber sensors
Sensors
Temperature measurement
Temperature sensors
Biomedical monitoring
Monitoring
Optical fibers
Fabry-Perot (FP) cavity
fiber Bragg grating (FBG)
intracranial pressure
期刊
IF:
4.5
论文数:
2.2W
被引数:
7.3W
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