Project on Digital Fare Meter for Taxi

Fare is one of the major expenses in public transport at everyday. So correct estimation of fare is important
for passenger. In many vehicles, fare meters are used. Recently fare meters are built based on micro controller. Most of the builders use ATMEL 8051 micro controller, because this micro controllers are come into hand first. These micro controllers are CISC architecture. They have much more instructions But recently PIC well developed by MicroChip Company, is based on RISC architecture. In this paper, a fare meter has been built, based on PIC 16F84A, which is one of the most popular and versatile in use. Here the hardware and the software have been accomplished for a single and vital parameter i.e. bill of transport which is calculated by means of measuring the rotation of taxicab wheel and displayed by a display driver circuit. By measuring rotation, distance traveled by taxicab, time of travel and speed can also be calculated and displayed. This fare meter has been developed in respect of our country, Bangladesh to reduce cost of manufacturing and make it available in market. Thus this attempt will also reduce the import of these fare meters from other countries, especially from India.

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Design, Fabrication, and Testing of a Chitosan Based Optical Biosensor:

This work presents the design, fabrication, and testing of an original concept for an optical biosensor device intended for use in a microfluidic network. The device uses planar waveguides intersecting a microfludic channel with biofunctionalized patterned sidewalls to detect biomolecules via fluorescent labeling. The optical-biological interface is provided through chitosan, a natural biopolymer. Chitosan is electrodepositable, and this material platform was developed to enable spatially selective and temporally selective assembly of biospecies in the sensor using electrical signals…
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Laser Triangulation Using Spacetime Analysis

In this thesis spacetime analysis is applied to laser triangulation in an attempt to eliminate certain artifacts caused mainly by reflectance variations of the surface being measured. It is shown that spacetime analysis do eliminate these artifacts almost completely, it is also shown that the shape of the laser beam used no longer is critical thanks to the spacetime analysis, and that in some cases the laser probably even could be exchanged for a non-coherent light source. Furthermore experiments of running the derived algorithm on a GPU (Graphics Processing Unit) are conducted with very promising results. The thesis starts by deriving the theory needed for doing spacetime analysis in a laser triangulation setup taking perspective distortions into account, then several
experiments evaluating the method is conducted.


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