PRZOOM - /newswire/ -
Bristol, Avon, United Kingdom, 2015/02/10 - Imetrum’s video measurement system has “great prospects in torque measurement.” as has been cited in a paper by scientists from the Department of Automobile Engineering at the Military Transportation University in China - Imetrum.com.
Imetrum’s Video Gauge Technology has been cited as an accurate measurement system for dynamic torque measurement in shafts. The recommendation appears in a paper published in the journal, Manufacturing and Engineering Technology, by scientists from the Department of Automobile Engineering at the Military Transportation University in China.
Imetrum systems are able to take multiple strain (including shear strain), and rotation measurements down to a few microstrain in a controlled environment, and so are well suited to this kind of material and component characterisation and testing and development.
The authors compare different methods of applying the torsion angle method to measure shaft dynamic torque. This calculation has important effects on testing transmission performance of mechanical equipment and calculating the shaft power. However, problems arise as the shaft is typically very stiff and minute strains or displacements occur under the effect of torque, so even a small disturbance can result in a large error. High precision measurement of the shaft dynamic torque is also made extremely difficult due to the inherent vibration and motion within the shaft and the fact that measurements can be easily affected by factors such as temperature, smoke and an electromagnetic environment.
The paper examines different ways of accurately measuring torque. The scientists compared established methods including a photoelectric sensor, magnetoelectric sensor, capacitive grating sensing technology and Laser Doppler technology alongside two emerging methods Micro-Electromechanical systems (MEMS) and Imetrum’s non-contact video measurement technology. It discusses the advantages and disadvantages of each method and cited Imetrum’s system with the best accuracy of 0.05um.”
The researchers concluded that Imetrum’s video measurement system has “great prospects in torque measurement.”’ As the paper was discussing a range of techniques, their principal conclusion was that the accuracy of measurement systems is improving, with the most modern equipment enhancing both speed and accuracy of the tests.
Imetrum’s product (imetrum.com) now has over 300 users worldwide and is a versatile, non-contact video based system that allows the user to test a variety of over 200 important parameters (strain, rotation, displacement etc.) in real time, in a single test. The Video based measurement system is ideal for use in exacting market areas such as aerospace, automotive, defence, oil & gas, energy, R&D and high technology motorsport, where highly accurate measurements directly traceable to national standards are critical for their materials, component or sub-assembly development. In materials it is the world’s first video extensometer capable of being calibrated to BS EN ISO9513 Class 0.2, which also equates to the equivalent American standard ASTM E83 Class B-1. As the Imetrum system is video based, a record of the test can be saved so engineers can either post process the test or complete further analysis without the need for repeating the test, saving both time and money.