Strainsert's Updated Bi-Axial Load Pin Application Note
Bi-Axial Load Pins are designed for applications that measure a radially applied force (Pr) where the load direction is unknown and/or changing in direction. This is facilitated by the installation of 2 perpendicular strain gage bridges (Px and Py), instrumentation, and geometric calculations.
Download a PDF version of the Bi-Axial Load Pin Application Note
One common use for a Bi-Axial Load Pin is at the hub of a sheave (or pulley) system, which is used to measure line tension. A Bi-Axial Load Pin installation has one end of the line at a fixed angle as a reference while the other end will vary in angle.
Other applications include rotating joints, mooring lines, hinge pins, loader buckets, aircraft landing gear and hydraulic actuators.
Also included in the application note is information on the Crosstalk correction. Crosstalk error is observed when a radial force (Pr) is applied at varying angles and the sensor output magnitude does not fit the expected circular pattern.
The Analog 4-20 mA Strain Gage Module converts bridge sensor output into a 4-20 mA current loop.
It can be powered by a standard DC power supply (7.5 to 36VDC) and is measured by remote instrumentation. Outputs can be configured for either UniPolar or Bi-Polar operation.
Strainsert's Updated Sheave Load Pin Application Note
Load Pins are designed into sheave applications for measuring line tension. Sheaves are designed with either a variable or constant wrap angle.
Download a PDF version of the Sheave Load Pin Application Note.
For the variable wrap angle case, two strain gage bridges are installed perpendicularly (Px and Py). For a sheave with a variable wrap angle, the line enters and exits the sheave at 1 fixed angle point and 1 variable angle point.
For the constant wrap angle case, one strain gage bridge is installed along the primary (sensing) axis of force (P). For a sheave with constant wrap angle, the line enters and exits the sheave at 2 fixed angle points.
About Strainsert Company
Headquartered in Conshohocken, PA and established over six decades ago, Strainsert is an industry leading designer and manufacturer of force sensors products, including load cells, load pins, tension links, force sensing bolts/studs, instruments and force measurement systems. Strainsert is a pioneer in the force sensor industry, with numerous patented designs made possible by innovative internal strain gaging processes and an unsurpassed dedication to engineering, customer requirements and vast industry experience in the Aerospace, Military, Marine and Automotive industries. Strainsert is AS9100 / ISO 9001:2008 certified. If you have questions or need more information about our products and services, please visit www.strainsert.com or call 610-825-3310.
