spændingsmålere

Spændingsmålere, often translated as strain gauges, are devices used to measure the deformation of an object under stress. They are essentially small, flexible resistors whose electrical resistance changes proportionally to the amount of strain applied to them. This change in resistance is then measured and converted into a strain value.

The most common type of spændingsmåler is a foil strain gauge, which consists of a very thin metallic foil patterned into a grid. This grid is bonded to the surface of the object being measured. When the object deforms, the foil grid also deforms, stretching or compressing along with it. This physical change alters the electrical resistance of the foil.

Spændingsmålere are typically used in conjunction with a Wheatstone bridge circuit. This circuit allows for precise measurement of the small resistance changes. When the spændingsmåler is part of the bridge, any change in its resistance causes an imbalance in the bridge, resulting in a measurable voltage output. This output voltage is directly proportional to the strain.

Applications for spændingsmålere are widespread. They are crucial components in load cells, used to measure weight and force, and in pressure sensors. They are also employed in structural health monitoring, automotive testing, aerospace engineering, and medical devices. Their ability to detect minute deformations makes them invaluable tools for understanding material behavior and ensuring the integrity of structures and components.