Ultrasonic Local Positioning System with Large Covered Area

2007 IEEE International Symposium on Intelligent Signal Processing Pub Date : 2007-10-01 DOI:10.1109/WISP.2007.4447508

J. M. Villadangos, J. Urea, M. Mazo, A. Hernández, C. De Marziani, M.C. Perez, F. Álvarez, J.J. Garcia, A. Jiménez, I. Gude

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引用次数: 26

Abstract

This work describes the design of a ultrasonic local positioning system (ULPS) with large covered area. The beacons have been designed with a cylindrical PVDF transducer (piezofilm transducer) to which a conical reflector has been connected to enlarge the covered area and to guarantee 3D indoor positioning. The proposed ULPS for mobile robots (MR) uses simultaneous emissions from ultrasonic beacons. In order to solve the problem of simultaneous emissions from ultrasonic beacons, the well-known technique, direct sequence code multiple division access (DS-CDMA), is used. This technique encodes the ultrasonic signal with a 255-bit Kasami code for every beacon. It implies the emitted signal by every beacon to have a wide bandwidth. PVDF-based transducers suitably guarantee this requirement. Their cylindrical or semi-cylindrical shape makes the emission pattern not suitable when using them as ultrasonic beacons, often located in the ceiling of an indoor room. To adapt the emission pattern and to increase the covered area in the ground, the design process of a conical reflector is described.

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大覆盖面积超声局部定位系统

本文介绍了一种大覆盖面积超声局部定位系统的设计。信标设计了一个圆柱形PVDF传感器(压电薄膜传感器)，连接了一个锥形反射器，以扩大覆盖面积，并保证三维室内定位。提出的移动机器人ULPS (MR)使用超声信标的同步发射。为了解决超声信标的同步发射问题，采用了著名的直接序列码多分接入技术(DS-CDMA)。这种技术用255位卡萨米码对每个信标的超声波信号进行编码。这意味着每个信标发出的信号都有一个很宽的带宽。基于pvdf的换能器适当地保证了这一要求。它们的圆柱形或半圆柱形使其发射模式不适合用作超声波信标，通常位于室内房间的天花板上。为了适应发射方向图，增加地面覆盖面积，介绍了锥形反射器的设计过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2007 IEEE International Symposium on Intelligent Signal Processing

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