one important optical property of materials. For liquid materials, it alsoprovides information to analyze liquids or mixed solutions, such as chemicals, foodstuffs, drinks,and pharmaceuticals. In general, the instruments to characterize the index of liquids weredeveloped according to the fundamental optical properties such as total internal reflection (Abberefractrometer)1, diffraction (grating)2, interference3, or deflection4,5, etc.Minimum deviation method (MDM) is one well-known and well-developed index measurementmethod since 1930.6-9 In this method, the index was deduced by the “minimum deviation angle”of the probe beam when it passed through the material under test. Such a material can be solid orliquid, but it has to be shaped as a
to aplastic spindle for driving the conveyor belt, a freely rotating plastic spindle for the opposite side ofthe conveyor belt, and two Plexiglas sides. Three IR reflective sensors (one in the middle and one ateach end) are used to detect the position of an object on the conveyor. The objective of the projectis for students to design the software (using LabVIEW) and hardware interfacing electronics for theconveyor control system such that it mimics the operation of a conveyor with beginning, stamping,and ending stations. Students are required to use a National Instruments data acquisition systemwith analog I/O and digital I/O capability. This paper provides a detailed listing of the engineeringrequirements for the system, the functional test