New non-contact Extensometer launched by Make Measurement Matter exhibitor
Recently introduced by Make Measurement Matter exhibitor Tinius Olsen is the Epsilon ONE, a new optical, non-contact extensometer that provides high-accuracy, high-resolution, non-contacting axial strain and displacement measurement. The unit uses video to measure strain, and the company states that the Epsilon ONE is unique in its ease of use for efficient materials testing. The new machine is likely to be a focal point of discussion at the forthcoming Make Measurement Matter event, held in association with the GTMA at the British Motor Museum near Warwick on March 12th.
Epsilon ONE, says Tinius Olsen, offers ultra-high camera resolution, with real-time data rates up to 3000Hz, together with the minimisation of optical error sources and the delivery of high strain resolution and accuracy with the lowest noise.
Strain or extension is measured and output in real time. Epsilon ONE’s high resolution and ISO 0,5 / ASTM B-1 accuracy make it suitable for non-contact measurement of a wide range of strain values, from very small strains required to measure the modulus of metals, composites, ceramics and CMCs through to elastomers and much in between.
The company further states that the Epsilon ONE is straightforward to use, and doesn’t have to be started and stopped for each specimen tested, like most video extensometers and DIC systems do. With its Laser-Assist alignment system providing instant alignment and distance spot checks, the machine uses tele-centric lenses to eliminate errors due to out-of-plane movements on low strain materials and components.
Many applications across industry involve specimens that straighten, or grips that are free to align under tensile loading. Unlike conventional lenses, tele-centric lenses such as those used in Epsilon ONE are insensitive to potential inaccuracies caused by these out-of-plane motions. With a tele-centric lens, the image of a test specimen seen by the camera’s sensor is the same size even if the specimen moves closer to, or further away from, the Optics Package.
This gives the benefit of maintaining full strain measurement accuracy, even if the specimen or grips move “out of plane” during the test. The company states that this is a key differentiator between Epsilon ONE and alternative equipment. This new machine, together with many others in the extensive Tinius Olsen testing range, can be discussed at the forthcoming Make Measurement Matter event.
Entry to Make Measurement Matter, organised in association with the GTMA, is free of charge by pre-registration. The show takes place at the acclaimed British Motor Museum on 12th March next year: the venue is located adjacent to the Aston Martin and JLR plants south of Warwick and just 1 minute from the M40. There is abundant free parking, and for visitors arriving before 1030, a free bacon roll and brew too. Tea and coffee is provided free of charge all day at the event, and pre-registered exhibition visitors can also visit the superb British Motor Museum, with almost 300 fascinating cars on show, free of charge too (standard adult entry fee otherwise is £14.50).