Ultrasonic fuel level monitoring device

• US 20050284218A1
• Filed: 05/16/2005
• Published: 12/29/2005
• Est. Priority Date: 05/17/2004
• Status: Active Grant

• Current Assignee: Schmitt Measurement Systems, Inc. (Schmitt Industries, Inc.)
• Original Assignee: Schmitt Industries Canada Limited (Schmitt Industries, Inc.)
• Inventors: Lagergren, Peter John
• Granted Patent: US 7,287,425 B2
• Time in Patent Office: Days
• US Class Current: 73/290.00V
• CPC Class Codes: G01F 23/2962 Measuring transit time of reflected waves
• CPC Class Codes: G01F 23/804 containing circuits handling parameters other than liquid level

Abstract

The invention describes a method of altering the transmitted frequency used in an ultrasonic ranging system for liquid level measurement in a fuel tank. The frequency agility of the system is an important component of performing liquid level measurement in an enclosed vessel.

Claims

1. What is claimed in this invention is a method of determining the level of liquid in a storage tank by use of an externally mounted ultrasonic transducer transmitting acoustical energy into the liquid mass and timing the arrival of the return echo and;

the ability to alter the frequency of the transmitted pulse(s) to accommodate different thicknesses of tank walls, different chemical composition of the liquid, different temperatures and other variables that alter the transmission frequency that is most effective.