This research is designing and construction an apparatus of deflection of fixed end beam under uniformly distribution load. SolidWorks program is used for structure designing and CosmosWorks program is used for strength of structure analysis. Deflection and strain of beam were compared with the result of mathematical model according to function stress principal. Error of mathematical model result does not exceed 10%. Therefore this apparatus can be used as prototype and produced for education purpose.

According to the studying this research absorbance detection system for flow injection analysis system was constructed by using syringe pump so the problem of bubbles in the system was solved successfully. The principle of the test-kit based on pushing the solutions into the system using double two ml syringe pumps. The solutions were mixed at mixing coil then the solution of the sample was inserted automatically by using six-port-valve. The detector was built from light-emitting-diodes (LEDs) with the wavelength at 620 nm. The product solution in cuvette was exposure then the light energy was transferred to electric current by photo-diode. The electricity was changed to voltage to micro-controller. The absorbance was calculated. The results absorbance and flow rate were controlled by utilization of Labview software. The absorbance of the samples from the developed system was compared to the commercial spectrophotometer. The mean absolute percentage error of the flow rate was 1.2%.

This research aims to Test Melt Flow Index Spiral Test according to Standard ASTM : D 3123-94. To compare with this Standard the Melt Flow Index Spiral Test of HDPE PP and ABS which determined by the manufacturer was tested in various sizes. The test and the results were as follow:

Nowadays the Thailand automotive industry widely grows. Brakepad is one of the automotive productions that role to automotive industry because it is the most critical security parts. Consequently testing products for quality are extremely requested. However the equipment and function tests are not enough and are also high cost so it cannot supports to the automotive industry development. In this work the initiation and design of frictional test were carried out. The testing procedure is referred to The special test jigs for friction measurements JIS K7125[5] and Clutch facings for automobiles JIS D4311[6].A study of the frictional test emphasize on the static friction(l-ls) and kinetic friction(l-lk) in different condition. There are 3 specimens of brake pad supported by the industry company. These specimens were test and compared between the pin on disks result and the friction testings result. The two-sided results from the analysis correspond but the pin on disks friction coefficient is more than the friction testings friction coefficient by 19.56%. Moreover the coefficient of friction tends to follow the temperature. Besides the static friction(l-ls) is likely more than kinetic friction(l-lk) and will be high difference in high pressure condition.

Current energy from sun made a significant contribution in the electricity manufacturing industry in Thailand. However the potential application of solar energy are at the low level. The agency will need to make solar energy perpendicular to the sun as much as possible. Therefore the invention of the light experimental set for two-axis motion to identify the vertical axis was done to compare the value of Light Dependent Resistor to locate the origin of the light and can be applied to the real work in the future.