6. Final performance of optimized sensor and signal processing
Improvements to the sensor (polishing) and signal processing have enabled us to reduce the minimum pressure measured with the reference sensor using a water coupling on a tube incorporating a retaining spring. With this sensor operating at 3.5 MHz and 8 MHz, and with signal processing that studies the first and second echoes, it is now possible to measure an underwater pressure close to 20 bar (figure 9) for any mixture of helium and xenon.
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Final performance of optimized sensor and signal processing
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