MOMS-ACDC-Pressure™
ROI’s Micro-Opto-Mechanical-Systems (MOMS) ACDC Pressure™ sensor technology conforms to a fully integrated, self-contained, novel optical interferometric pressure sensor designed suitable to measure a wide dynamic range of deep underwater pressures. The MOMS pressure sensor consists of two Extrinsic Fabry-Perot micromachined optical sensors, one measures large static (DC) pressures and another one measures very small dynamic (AC) pressures. An integrated built-in sensor interrogator electronics based on photonic integrated circuit (PIC) microchip technology measures the optical signals from the MOMS sensor and provides an analog voltage output proportional to the pressure measurand.
Fiber Optic MOMS Interferometric Accelerometer | |
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Monitoring Mode | WDM Fabry-Perot Interferometer Multiplexing |
Sensing Channels | Single Axis, Bi-Axial, and Tri-Axial Accelerometers |
Full Range Scale | L ± 1.7-g |
Sensitivity | 5-nm/g |
Wide Dynamic Range | ≥ 140-dB |
Low Noise | ≤ 40 ng/ √Hz at 1000Hz |
Frequency Range | 10-Hz to 5000-Hz |
Weight | ≤ 25-g single axes; 75-g tri-axial |
Size | 15-mm x 25-mm x 25-mm (H x W x L) |
Fiber Optic Accelerometer WDM Interrogator | |
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WDM Demodulator | Three Accelerometers and One Temperature Sensors |
Fiber Range | ≤ 1-km |
Wavelength Range | 60-nm @ 1550-nm |
Wavelength Accuracy | ≤ 20-pm at full data sampling rate 20-kHz |
Wavelength Dynamic Range | ± 5,000-pm |
No. of Sensing Fibers | 1 x 4, 1 x8, or 1x 12 Optical Switch |
Sampling Rate | DC to 20-kHz |
Signal Processor | Ultra-low-power Microcontroller |
Data Communication | Wireless – WiFi IEEE 802.11 (range 40- to 100-meter) |
Power Consumption | ≤ 1-W @ 5-Vdc |
Power Supply | Li-Battery 3.7-V/6W/hr – Rechargeable |
Weight | < 500-grams |
Package Dimensions | 2-inch x 2-inch x 2-inch |