Overview of Weight Measurement Methods

Overview of Weight Measurement Methods - uniform bond...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Jason Fox Ed Farrell Jeremy Davia ENGR160-02 5/12/2009 Overview of Weight Measurement Methods: Weight can be measured in a variety of different ways. Some of the most common methods are purely mechanical, such as a fish scale or a produce scale at a super market. These scales typically employ a spring that will undergo tensile stress ( T σ ) and stretch proportionally to a given weight according to Hooke’s Law and the modulus of elasticity of the material used for the spring. For the purposes of this design an electromechanical system of weight measurement has been designed. By bonding a strain gage to an aluminum sensing beam and wiring the gage to a Wheatstone bridge, a voltage differential can be measured and calibrated using known weights. With a strong and
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: uniform bond between the strain gage and sensing beam, the stress undergone by the beam will transferred to the strain gage resulting in a strain on the wires of the gage and thus a change in resistance of the gage. Like the spring scales, the mechanical properties of the aluminum beam, according to Hookes Law, will determine how much stress is experienced for a given weight. This stress will then transfer to the strain gage, imparting a strain, or stretching/compressing of the wires of the gage, and thus changing the resistance of the gage proportionally according to its Gage Factor....
View Full Document

This note was uploaded on 04/08/2008 for the course ENGR 160-02 taught by Professor Staff during the Spring '08 term at Wentworth Institute of Technology.

Ask a homework question - tutors are online