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A low cost remote sensing system using PC and stereo equipment
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View: Figures


Image of Fig. 1.
Fig. 1.

Cross correlation of code and shifted code computed with a FFT.

Image of Fig. 2.
Fig. 2.

Sound waves reflecting off a hard target.

Image of Fig. 3.
Fig. 3.

A simple computer system for measuring range. Enclosed dashed lines show which functions are either performed in software or are internal to the computer.

Image of Fig. 4.
Fig. 4.

Carrier demodulation using the Hilbert transform.

Image of Fig. 5.
Fig. 5.

Sample Labview program output for sonic/ultrasonic ranging system. The target was a large metal file cabinet. The large return was from the front of the cabinet and the second smaller return was from a set of glass doors behind the cabinet.

Image of Fig. 6.
Fig. 6.

Experimental setup for an ultrasonic ranging system capable of transmitting a carrier up to 45 kHz.

Image of Fig. 7.
Fig. 7.

Home experiment configuration using a computer speaker/amplifier and microphone embedded in an oil funnel. Note that the microphone slips loosely inside the narrow mouth oil funnel, which has the narrow end cut off.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A low cost remote sensing system using PC and stereo equipment