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>> Piping systems play an important role in gas and oil transferring system. In the piping system, thereare many elements, such as valves and flow meters. In order to check their normal operating conditions, eachsignal from each element is displayed on the monitor in the pipe control room. By the way, there are severalaccidental cases in the piping system even if all signals from the local elements are judged to be normal on themonitor in the control room. Further, opposite cases often happen even the monitor shows abnormal while the local elements work normal. To overcome this abnormal functions, it is not so easy to construct the environmentin which sensors detecting the working states of all elements installed in the piping system. In this paper, a newnon-contact measurement technique which can calculate the elements' delicate displacements by using a PIV(particleimage velocimetry) and diagnose their working states by using a neural network is proposed. The measurementsystem consists of a host computer, a micro system, a telescope and a high-resolution camera. As a preliminarytest, the constructed measurement system was applied to measure delicate vibrations of mobile phones. For practical application, a pneumatic system was measured by the constructed system.

Measurements of Remote Micro Displacements of the Piping System and a Real Time Diagnosis on Their Working States Using a PIV and a Neural Network