~WRL3396 - were already made for us. All we had to do was...

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Laboratory 7 Optical Sensor for Acoustic Measurement James King Daniel Hegarty Eyamindae Jallow ENME 351 Section 0103 Date: 11/27/09
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Objectives The objective of this experiment is to gain hands-on experience with the sound wave and optical measurement systems in Labview. We are also supposed to learn how optical microphones are better then condenser ones. Finally we are meant to measure the frequencies of pure sound tones. Instruments Used PC with National Instruments DAQ card Labview NI SCC-68 connector board Fiber optical acoustic sensor Light source: superluminescent diode with laser controller Optical coupler Photodetector Set-up Exercise 7.1 This lab was pretty fast because the block diagram and front panel in Labview
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Unformatted text preview: were already made for us. All we had to do was set the optical devices to the correct settings, and then we could start collecting data. The first step was to turn on the SLD light source. After it was turned on, we had to set the resistance value to 10 k. After the resistance was set, we had to rotate the knob twice to get to the Ioperation screen. On this screen, we had to make sure that the current was set to 000 mA. We then pressed the pumping button to be sure that the laser diode in on, then we reset the current value to 175 mA. The next step was to turn on the photodetector. Set-up Exercise 7.2 Conclusion...
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