Patent ID: 7098669
Filing Date: 2006-08-29
Classification: G01F,G01N,G01S

Abstract:
1. A system for determining the depth of a fluid in a storage tank, wherein the depth of the fluid is determined after the detection of a pulsed wave that is reflected from the top surface of the fluid, the system comprising: a. a transducer configured to measure the reflected pulsed wave and to generate an analog input signal that corresponds to the reflected pulsed wave; b. an analog-to-digital converter that is coupled to the transducer, and configured to convert the analog input signal into a digital input signal; and c. a filter that is coupled to the analog-to-digital converter, wherein the filter includes a finite impulse response filter that is configured to receive the digital input signal and to generate a digital output signal, the finite impulse response filter including: