Wireless Sensor Networks

As a sum­mer Intern at the Indian Insti­tute of Sci­ence under K.V.S Hari, I worked on an iner­tial nav­i­ga­tional sys­tem using a pair of wire­less Cross­bow® TelosB Mote’s. The TelosB mote is built on the MSP430 plat­form with an accelerom­e­ter, gyro­scope, humid­ity, tem­per­a­ture and other sen­sors on board.

TelosB Mote

I attempted to com­pute and plot the move­ment of one of the sen­sors rel­a­tive to its start­ing posi­tion using Mat­lab, using the log with the sen­sor read­ings; the final goal was to make this a real-time nav­i­ga­tion sys­tem. I ini­tially used the two axis accelerom­e­ter, but faced prob­lems with the jit­ter in the read­ings, and a bias intro­duced by the earth’s grav­i­ta­tional force. I tried to adjust for this using the inbuilt 2 axis gyro­scope, but still faced large prob­lems with the bias.

On the sug­ges­tion of my advi­sor, I even­tu­ally stopped work on this project, and began explor­ing Bin­au­ral Spa­tial Audio.

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