Can ARAMIS Replace Traditional Mechanical Sensors?
Strain gauges (or strain gages) have been the standard tool in engineering to measure local strains on the surface of components. However, they require a lot of time for a highly skilled technician to install properly and only provide a single point reading of strain. Optical strain measurement techniques, like 3D Digital Image Correlation, are becoming the most attractive alternative to strain gauges as it provides a full strain map of the object without having to install any contacting sensors.
LVDT (Linear Variable Differential Transformer), String Pots, and laser trackers are the most commonly used sensors to measure displacement. The ARAMIS system is a non-contact measurement device designed to optically measure a large number of points precisely and rapidly in all 6 degrees of freedom (6DoF).
Extensometers are commonly used to measure distance and strain between two points. Contacting extensometers like clip gauges are the most common. The 90s and 2000s saw the rise of non-contacting sensors like laser extensometers or video extensometers, but these sensors all measure the distance between only two points. Today, the ARAMIS system is commonly used to provide a full strain map of the specimen and gives much more accurate strain measurements and insights on the materials
Vibration analysis requires the acquisition of test data. Historically, accelerometers have been used to measure the frequency response of structures at a select number of points. Laser vibrometers and laser scanning vibrometers are an alternative, providing a non-contact measurement. However, the measurement is long, fastidious, and not synchronous. The ARAMIS High-Speed Systems, coupled with our vibration analysis tool or third party software offer an instant improvement on the acquisition time and the quality of the data.