Abstract
We develop a new navigation system for Automatic Guided Vehicles (AGV). The guided marker of the navigation system is composed of ultrasonic transducers instead of the traditional markers such as electromagnetic tape, light reflective tape and so on. The ultrasonic transducer is genetically susceptible to noise, so that we make the following propositions. First, a phased array of the ultrasonic transducer is employed in making search for a land marker to improve the signal-to-noise ratio. Second, the specific ID with Tbits is assigned as the land marker to avoid the system errors ascribable to an ultrasonic interference. In addition, the proposed system is quite compact in virtue of the embedded technology of a microcomputer and Field Programmable Gate Array (FPGA). This paper reports the development of the base system of navigation system and results of location estimation experiment of a land marker at a short distance.
