| 摘要 |
<p>The depthimeter comprises a heave sensor (14), a mean path compensator (12) and a combiner (16). The mean path compensator comprises a ranging device which measures the distance of the vehicle from a fixed point on the vehicle to ocean surface as a function of time; a range compensator to compensate for signal dropouts, for sensor offset angle, and vehicle pitch and roll, thereby providing a signal that contains the vehicles vertical motion and the vertical motion of the sea surface. A low-pass filter within the mean path compensator which produces a signal that is the mean path of the vehicle, referenced to mean sea level. The combiner merges the mean path signal and a heave signal to generate a signal that is a submerged vehicle's depth relative to mean sea level. This signal is also the vehicle's vertical displacement with time relative to mean sea level.</p> |
