Full-Field Displacement Measurement Method of Metal-As-Insulation Pancake at Liquid Nitrogen Temperature

Effects of thermocouple electrical insulation on the measurement ofᅡᅠsurface temperature

Analytical, numerical and experimental analyses have been performed to investigate the effects of thermocouple wire electrical insulation on the temperature measurement of a reference surface. Two diameters of type K thermocouple, 80 mm and 200 mm, with different exposed wire lengths (0 mm, 5 mm, 10 mm, 15 mm and 20 mm) were used to measure various surface temperatures (4 C, 8 C, 15 C, 25 C and...

A New Method for Insulation Resistance Measurement at Low Voltage Level Using Change of Effective Resistance

− Test of insulation resistance is pre-requisite for leakage effect evaluation in many electrical measurements. Especially high resistance measurement at low working voltage is often required for evaluation of high precision measurement system. The high resistance measurement at low voltage level with portable hand-set is a challenging task. Here we suggest a simple and convenient method to mea...

Full-Field Shape Measurement of Specular Surfaces

Improved Newton-Raphson digital image correlation method for full-field displacement and strain calculation.

The two-dimensional in-plane displacement and strain calculation problem through digital image processing methods has been studied extensively in the past three decades. Out of the various algorithms developed, the Newton-Raphson partial differential correction method performs the best quality wise and is the most widely used in practical applications despite its higher computational cost. The ...

Application of Liquid Crystal Tracers for Full Field Temperature and Velocity Measurements

It is common in computational fluid dynamics research to validate numerical models against laboratory experiments. It is because due to the problem complexity, it is not a trivial task to determine precisely an error of the numerical results. Errors appearing due to limited accuracy of different numerical methodologies, and due to inevitable simplifications introduced in the models, are usually...