Implementation of ultrasonic ranging and fire safety for blind person

Abstract

This paper shows a method to introduce a mobility aid for blind persons by giving alert to blind person using voice processor with ear phones. This system is also used in automatic robots, self propelling vehicles in automated production factories etc. This system contains a signal processing unit with LPC 2148 microcontroller. This receives data from serial input/output port and gives alert to blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using lpc2148 micro controller which is used for interfacing between different sensors and pc. sensor then process it and delivers it to the computer using serial input/output port  and gives alert to blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using LPC 2148 micro controller which is used for interfacing between different sensors and pc. Further received data is verified using MATLAB.