Other

Siemens Vdo Automotive Corporation

Expro Meters, Inc.

Access Scientific, LLC

Carl Gandarillas

Daniel L Gysling

Joshua T Druker

Michael Francis Wei

Michael G Tal

John Lapetina

Janelle Anderson

John P Marano, Jr

Brian David Kilmartin

Jon W Bossoli

Robert Yuen Lee Ang

Aaron Abroff

Changjiu Dang

Mark E Sasso

An apparatus for measuring a parameter of a fluid flow passing within a pipe is provided. The apparatus includes a sensing device and a processing unit. The sensing device has a sensor array that includes at least one first macro fiber composite (MFC) strain sensor disposed at a first axial position, and at least one second MFC strain sensor disposed at a second axial position. The first axial position and the second axial position are spaced apart from one another. The at least one first MFC strain sensor and the at least one second MFC strain sensor are both configured to produce signals representative of pressure variations of the fluid flow passing within the pipe. The processing unit is configured to receive the signals from the sensor array and measure one or more fluid flow parameters based on the signals.

Apparatus and method for measuring fluid flow parameters

A device may include a hollow needle, a dilator mounted coaxially on the needle, and a sheath mounted coaxially on the dilator. The dilator may be slideably displaceable relative to the sheath.

Access device with blunting device

A method for producing a low-hysteresis magnetoelastic element comprising applying a magnetoelastic material onto a metal substrate. After the magnetoelastic element is securely bonded to the underlying shaft, a reduction in the outside diameter of the shaft draws the magnetoelastic element radially inward causing it to occupy a smaller volume. This process provides the magnetic anistropy required for the sensor to operate properly, and also results in a densification of the magnetoelastic element making it inherently stable. Several methods of reducing the outside diameter of the shaft to draw the magnetoelastic element radially inward have been devised. Prior to deposition of the magnetoelastic material, the outside diameter of a hollow shaft is elastically expanded by applying force to its inside diameter. This is accomplished by using an expanding insert, by pressurizing the cavity within the shaft, or by inducing a managed thermal expansion of the shaft prior to material deposition. Post-deposition operation can also be implemented to reduce the shaft diameter, such as drawing the shaft axially until it yields. Any process that results in a shaft reduction after the magnetoelastic active material is deposited on the shaft can be used in the present invention.

Imparting compressive hoop stress into a bonded magnetoelastic element by means of diameter reduction of the underlying shaft

A low-hysteresis torque sensor and method for producing a low-hysteresis magnetoelastic element including thermally spraying a magnetoelastic material onto a metal substrate. During the spraying process, axial compressive pressure is applied to the substrate, and subsequently released after the substrate and magnetoelastic element have substantially cooled. This process has the effect of substantially reducing hysteresis and the axial stress in the magnetoelastic element that would normally occur due to the different coefficients of thermal expansion between the magnetoelastic element and the substrate. In a preferred embodiment, the magnetoelastic element includes nickel and the substrate includes stainless steel. It is further preferred that the substrate include a shaft and the magnetoelastic element comprise a circumferential ring intimately attached thereto.

Magnetoelastic non-compliant torque sensor and method of producing same

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Beacon Falls, CT, United States of America

Carl Gandarillas