Improving iGS Ultrasonic Receiver Circuit of Low Cost Positioning Sensor for Ubiquitous Robotic Companion:

Abstract

The localization system, iGS has three kinds of medium to detect the distance of a mobile object. As the medium of distance detection, iGS uses ultrasonic wave, RF signal, and Infra-Red vision. iGS using ultrasonic signal has the target market for reasonable price. If the ultrasonic signal can be used with a lower performance digital signal processor(DSP), the price of the ultrasonic receiver will be more reasonable. For reasonable price, the ultrasonic receiver has the circuitry to change the fast signal into the slow signal. Even if the DSP has low speed, the slowly transformed signal can be sampled at a slow rate. The positioning accuracy of the slowly transformed signal is proven with the comparison test. If the ultrasonic receiver has the circuitry to transform the fast signal into the slow signal, iGS using ultrasonic signal can be a cost effective solution for the ubiquitous robot companion.