Abstract
A next generation fiber-optic microsensor based on the extrinsic Fabry-Perot interferometric (EFPI) technique has been developed for pressure measurements. The basic physics governing the operation of these sensors makes them relatively tolerant or immune to the effects of high-temperature, high-EMI, and highly-corrosive environments. This pressure microsensor represents a significant improvement in size and performance over previous generation sensors. To achieve the desired overall size and sensitivity, numerical modeling of diaphragm deflection was incorporated in the design, with the desired dimensions and calculated material properties. With an outer diameter of approximately 250 μm, a dynamic operating range of over 250 mmHg, and a sampling frequency of 960 Hz, this sensor is ideal for the minimally invasive measurement of physiologic pressures and incorporation in catheter-based instrumentation. Nine individual sensors were calibrated and characterized by comparing the output to a U.S. National Institute of Standards and Technology (NIST) Traceable reference pressure over the range of 0-250 mmHg. The microsensor performance demonstrated accuracy of better than 2% full-scale output, and repeatability, and hysteresis of better than 1% full-scale output. Additionally, fatigue effects on five additional sensors were 0.25% full-scale output after over 10,000 pressure cycles.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1638-1645 |
| Number of pages | 8 |
| Journal | Annals of Biomedical Engineering |
| Volume | 37 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2009 |
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Keywords
- Extrinsic Fabry-Perot interferometric (EFPI)
- Fiber-optic sensor
- Pressure
ASJC Scopus subject areas
- Biomedical Engineering
Cite this
Performance characteristics of a new generation pressure microsensor for physiologic applications. / Cottler, Patrick S.; Karpen, Whitney R.; Morrow, Duane A.; Kaufman, Kenton R.
In: Annals of Biomedical Engineering, Vol. 37, No. 8, 08.2009, p. 1638-1645.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Performance characteristics of a new generation pressure microsensor for physiologic applications
AU - Cottler, Patrick S.
AU - Karpen, Whitney R.
AU - Morrow, Duane A.
AU - Kaufman, Kenton R
PY - 2009/8
Y1 - 2009/8
N2 - A next generation fiber-optic microsensor based on the extrinsic Fabry-Perot interferometric (EFPI) technique has been developed for pressure measurements. The basic physics governing the operation of these sensors makes them relatively tolerant or immune to the effects of high-temperature, high-EMI, and highly-corrosive environments. This pressure microsensor represents a significant improvement in size and performance over previous generation sensors. To achieve the desired overall size and sensitivity, numerical modeling of diaphragm deflection was incorporated in the design, with the desired dimensions and calculated material properties. With an outer diameter of approximately 250 μm, a dynamic operating range of over 250 mmHg, and a sampling frequency of 960 Hz, this sensor is ideal for the minimally invasive measurement of physiologic pressures and incorporation in catheter-based instrumentation. Nine individual sensors were calibrated and characterized by comparing the output to a U.S. National Institute of Standards and Technology (NIST) Traceable reference pressure over the range of 0-250 mmHg. The microsensor performance demonstrated accuracy of better than 2% full-scale output, and repeatability, and hysteresis of better than 1% full-scale output. Additionally, fatigue effects on five additional sensors were 0.25% full-scale output after over 10,000 pressure cycles.
AB - A next generation fiber-optic microsensor based on the extrinsic Fabry-Perot interferometric (EFPI) technique has been developed for pressure measurements. The basic physics governing the operation of these sensors makes them relatively tolerant or immune to the effects of high-temperature, high-EMI, and highly-corrosive environments. This pressure microsensor represents a significant improvement in size and performance over previous generation sensors. To achieve the desired overall size and sensitivity, numerical modeling of diaphragm deflection was incorporated in the design, with the desired dimensions and calculated material properties. With an outer diameter of approximately 250 μm, a dynamic operating range of over 250 mmHg, and a sampling frequency of 960 Hz, this sensor is ideal for the minimally invasive measurement of physiologic pressures and incorporation in catheter-based instrumentation. Nine individual sensors were calibrated and characterized by comparing the output to a U.S. National Institute of Standards and Technology (NIST) Traceable reference pressure over the range of 0-250 mmHg. The microsensor performance demonstrated accuracy of better than 2% full-scale output, and repeatability, and hysteresis of better than 1% full-scale output. Additionally, fatigue effects on five additional sensors were 0.25% full-scale output after over 10,000 pressure cycles.
KW - Extrinsic Fabry-Perot interferometric (EFPI)
KW - Fiber-optic sensor
KW - Pressure
UR - http://www.scopus.com/inward/record.url?scp=70349563415&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349563415&partnerID=8YFLogxK
U2 - 10.1007/s10439-009-9718-x
DO - 10.1007/s10439-009-9718-x
M3 - Article
C2 - 19495983
AN - SCOPUS:70349563415
VL - 37
SP - 1638
EP - 1645
JO - Annals of Biomedical Engineering
JF - Annals of Biomedical Engineering
SN - 0090-6964
IS - 8
ER -