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    Conductivity analysis of lubricant in terms of deterioration by using a hall effect sensor
    (2019-11-01)
    Sriratana, Witsarut
    ;
    Prommapit, Sombat
    ;
    Khwankityotha, Yannadech
    ;
    Sriratana, Lerdlekha
    This paper investigates the efficiency of lubricant analysis by using electrical conductor theory that applied to check the performance of the lubricant, it will be indicate a life cycle of lubricant. The measurement process has led Electrochemical cell, Induction coil and Hall Effect sensor for electrochemical field analysis and compare it with electrical conductivity. In conductivity measurement experiment, we consider dynamic measurement velocity at 80 RPM with a lubricant Semi-Synthetic 10W-40 type by 5 different life cycle samples ratio, Used lubricant: Unused lubricant are 100% (4: 0), 75% (3:1), 50% (2:2), 25% (1:3) and 0% (0:4). The voltage output of Hall Effect sensor of 100% sample measurement at 100 degree Celsius is higher than the voltage output of 75%, 50%, 25% and 0% sample are 7.04%, 12.21%, 21.25% and 28.65%, respectively. The average percentage of Hall Effect sensor errors with the dynamic measurement method of the 5 lubricant samples was 2.87. Even though this measurement method had a high percentage of errors, but it has a cost advantage over the current measuring devices such as the Viscometer which is expensive cost.
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    Development of compatible induction coil with pure AC for hall effect sensor: A study on metal materials thickness
    (2018-12-10)
    Sriratana, Witsarut
    ;
    Khwankityotha, Yannadech
    ;
    Satthamsakul, Sutham
    This study presents an analysis of the parameters to generate the electromagnetic fields of the induction coils for the application of Hall Effect sensor to classify the aluminum thickness and the classification of the metal materials. In this research three types of induction coil are considered: Type A with one layer, Type B with two layers, and Type C with three layers. Four experiments were conducted. The electromagnetic field of Type C is found to be 11.90% greater than Type B, and 29.26% greater than Type A. The core temperature of Type C with 1 A current applied was found to be 3.50% hotter than Type B and 5.14% hotter than Type A. The classification of the aluminum thickness with the frequency range of 100 Hz to 1.4 kHz are suitable for identifying the thickness of 1, 2 and 3 mm. In terms of the classification of metal materials with all the three types of the induction coil, it can be separated clearly from the samples which consist of steel, stainless steel and aluminum. The total error by using Hall Effect sensor is ±0.5702%.