Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System
Abstract
:1. Introduction
2. System Instrumentation
3. System Calibration and Data Acquisition
- Vrms is the root-mean-square (RMS) value of the transmitted waveform in volts.
- Wrms is the RMS value of the acquired waveform in volts.
- G is the corresponding gain of the signal amplifier in decibels (dB), defined as 20 times the logarithm of the RMS ratio.
- D is the distance from the transducer to the receiver in meters; D is 1 m in Figure 1.
- Ps is the transmitting sensitivity of the transducer in dB re 1 μPa /V @ 1 m.
- Hs is the hydrophone sensitivity in dB re 1 V /μPa.
- TL is the transmitting loss in dB.
- The DAQ board triggers the waveform generator to send a preprogrammed signal (pulse, sine wave, or full coded waveform) to the transducer.
- The transducer converts the signal to acoustic pressure signals in the tank.
- The piezoelectric sensor in the receiver converts the acoustic pressure signal into voltage that is conditioned and amplified before being digitized and loaded into the computer buffer memory.
- The signal is saved to the computer hard drive if it meets the predetermined detection criteria.
- Steps 1 through 4 are repeated until the preset number of measurements is made.
- The data acquisition board triggers the motion control unit to move to the next location and start new measurements.
- Decoding utilities are used to evaluate system performance; data analysis packages are employed to compute sensitivities, beam profiles, or other characteristics.
4. System Performance Measurements
5. Conclusions
Acknowledgments
References
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Deng, Z.; Weiland, M.; Carlson, T.; Eppard, M.B. Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System. Sensors 2010, 10, 3090-3099. https://doi.org/10.3390/s100403090
Deng Z, Weiland M, Carlson T, Eppard MB. Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System. Sensors. 2010; 10(4):3090-3099. https://doi.org/10.3390/s100403090
Chicago/Turabian StyleDeng, Zhiqun, Mark Weiland, Thomas Carlson, and M. Brad Eppard. 2010. "Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System" Sensors 10, no. 4: 3090-3099. https://doi.org/10.3390/s100403090
APA StyleDeng, Z., Weiland, M., Carlson, T., & Eppard, M. B. (2010). Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System. Sensors, 10(4), 3090-3099. https://doi.org/10.3390/s100403090