load cell design

- Oct 19, 2016-

Load Cell Theory and Design

    Load cell is a conversion device for converting a weight signal or a pressure signal into an electric quantity signal.Laod cell adopts metal resistance strain gauges to form a measuring bridge,using the principles that under the action of tension ,the metal resistance wire will elongate and slim,and the resistance will increase.That is to say,it is caused by the effect that the metal resistance will change along with resistance varies.

    Construction principle of the load cell: Metal resistance has the property of hindering the flow of current, that is, with the resistance, the resistance varies according to the type of metal. The same resistance wire, in general, the more slender, the greater the resistance. When the metal resistance wire stretches by external force , its resistance value will increase or decrease within a certain range. Therefore, the wire (or film) is sticked onto a measured object, the wire or film is very slender or very thin, and the paste is very perfect, then, when the measured object stretches by external force , the metal resistance wire (or film) will be stretched  in proportion,and its resistance value will be a corresponding change. Load cell is to paste the metal resistance strain gauge onto the metal weighing beam to measure the weight of the signal.

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