Vibrating object assessment from a pulse operated vibrating sens

Details Vibrating object assessment from a pulse operated vibrating sens Vibrating object assessment from a pulse operated vibrating sens

1994-03-21

1995-06-13

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Spectrum analysis

342196, 342 54, 342 90, 342194, G01S 7292, G01S 1389

Patent

active

054247497

ABSTRACT:
A distant target vibration assessment and signature determining apparatus for operation from a vibrating platform such as an aircraft or helicopter. The disclosed system employs pulse illumination of the distant target and of nearby atmospheric aerosol particles and uses the latter illumination derived signal as a characterization in reverse of the vibrations of the sensor's mounting platform. The nearby and distal nature of the two illuminated energy reflections enables their range gated segregation and individual transformation into the frequency domain. Frequency domain vibration signatures of the distant target and the vibrating platform are then individually obtained and subtracted in order to obtain a clean vibration spectrum representation of the distant target. Variations of the system including a two pulse operating cycle, the use of signal strength evaluation and signal processing alternatives are also disclosed.

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