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 | |
|---|---|
| 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 | |
|---|---|
| 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 |