Parker-hannifin Corporation

Stanley Wood

Howard Austerlitz

George Alexandrovich, Sr

Lewis Boyd

Ronald W Bueter

Ron Bueter

Alexander Nektaredes

Ron King

Mark Savino

Stanley Sporn

Michael C Standish

A fluid level measurement system includes a first pressure sensor disposed inside a fluid tank at a first elevation relative to a height axis of the fluid tank, and a second pressure sensor disposed inside the fluid tank at a second elevation relative to the height axis of the fluid tank, the second elevation different from the first elevation. The first pressure sensor and the second pressure sensor are configured to provide a signal indicative of a sensed pressure, and fluid height is calculated from the difference in sensed pressure between the first and second pressure sensors relative to the sensed pressure of either the first or the second pressure sensor.

Aircraft fluid gauging techniques using pressure measurements and optical sensors

An in-line fuel properties measurement unit (IFPMU) () for in-line assembly in a fluid flow path, in particular a fuel flow path of an aircraft, includes a compensator section () and a densitometer section (). The densitometer section is connected in-line with the compensator section such that full fluid flow is seen by each section. The IFPMU further includes a circuit card having tabs or 'arms' for electrically interfacing with cylinders of the compensator section, wherein the cylinders include reliefs formed therein to create an air gap between the cylinder and the tab.

In-line fuel properties measurement unit

A sensing element and system for determining the density of fuel housed in the tank of an aircraft, includes sensing element (10). The sensing element has a disc shaped member (20) extending through a wall (16) of the sensor body. The sensor body also encloses a chamber (14) containing dry nitrogen at a pressure of one atmosphere. Electromagnetic driving coils (24) are electrically actuated to cause member 20 to vibrate in its resonant frequency in four quadrants with a node along an axis (22) corresponding to the wall of the sensor and a second node axis (42). Pickup coils (26) in the sensor body sense displacement of the disc shaped member in a location of maximum displacement. Fluid surrounding the sensing element causes mass loading of the exposed portion of the disc shaped member and changes its resonant frequency. The changes in resonant frequency along with values determined through calibration are used by a processor (44) to calculate the density of the fluid.

Fluid density sensor and system

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Middle Island, NY, United States of America

Stanley Wood