The Working Principle Of Load Cell

The load cell uses a metal resistance strain gauge to form a measurement bridge, which is made by using a metal resistance wire to be elongated and thinned under tension, and the principle of increasing resistance, that is, the effect of the metal resistance changing with strain.


1. What is a load cell? A load cell is a conversion device used to convert a weight signal or a pressure signal into a power signal.


Second, the construction principle of the load cell. Metal resistors have the property of impeding the flow of current. The same type of wire, in general, the more slender, the greater the resistance value. When the metal resistance wire is stretched by an external force, its resistance value increases or decreases within a certain range. Therefore, the wire (or film) is closely attached to the object to be measured, and when the object to be measured is stretched by an external force, the metal resistance wire (film) is also stretched and scaled, and the resistance value thereof changes accordingly. The load cell is a metal resistance strain gauge attached to a metal weighing beam to measure the weight signal.

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