DIRECT AND INDIRECT MEASUREMENT
By adopting both direct and indirect measurement techniques, Contrinex has implemented multiple sensing modes in a single Smart Sensor. Depending on the user-defined mode of operation, measurements may be output as either process data (routine, cyclical parametric values) or event data (exceptions generated on the occurrence of a critical event).
Using the Smart Sensor’s underlying capability for high-resolution distance measurement, direct measurements include axial distance (1) and lateral position (2). The sensor’s exceptional sensitivity also allows it to detect non-uniform features (for example, holes) present in a target (4).
Other physical properties whose application can be translated into a displacement are also suitable for Smart Sensing. Non-contact examples include: continuous angular measurement using a cam mounted on a rotating shaft (3), lateral position measurements of larger targets using an inclined plane surface on the target (5), force measurement using a transfer element that deforms elastically (6), as well as vibration measurement (amplitude and frequency) in the axial direction (7).
Step counting – either linear or rotational (8) – is another proven application for Smart Sensors. The sensitivity of these devices allows them to replace traditional encoders, which are often bulkier and more costly.
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