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New strain sensors for measurement

Noliac has developed piezoelectric sensors available for strain measurements in a wide range of sensitivities, beginning from nano strain resolution. Strain sensors could be equipped with Integrated Electronics Piezo Electric (IEPE) electronics with a low frequency limit, down to 0.1 Hz or lower.
New strain sensors for measurement

 

Noliac offers to customize this product to specific applications, for example bridges, buildings, machines etc.

Construction of the strain sensor

Strain sensors utilize piezoelectric shear element(s) or stack(s) of shear elements (1), which are connected with the measured surface (B) directly or through one wall of the casing (2) or through distance pads (2’). All are firmly connected to the measured surface (B). The construction is illustrated in the figure above, although the illustration does not obtain all possible configurations.

The elements (1) are joined by a force transferring element (3), which is not firmly connected with the casing, and therefore does not transfer strain or forces from the casing. The distance (L) between the measuring places could be from zero up to a limit given by requested dynamic properties or sensitivity.

The sensor could be filled by flexible potting material (5).

See a larger version of the figure

 

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Performance Dimensions
Value
Max operating voltage / V
Min
Min free stroke / µm
Min
Min estimated blocking force / N
Min
Min
Max
Length or outer diameter / mm
Min
Max
Width or inner diameter / mm
Min
Max
Max height / mm
Max
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  • Damage tolerant stacks
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