WO2009063114A1 - Rfid-based object tracking for the visually impaired - Google Patents

Rfid-based object tracking for the visually impaired Download PDF

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Publication number
WO2009063114A1
WO2009063114A1 PCT/ES2008/000710 ES2008000710W WO2009063114A1 WO 2009063114 A1 WO2009063114 A1 WO 2009063114A1 ES 2008000710 W ES2008000710 W ES 2008000710W WO 2009063114 A1 WO2009063114 A1 WO 2009063114A1
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WO
WIPO (PCT)
Prior art keywords
database
rfid
location
blind
tags
Prior art date
Application number
PCT/ES2008/000710
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Spanish (es)
French (fr)
Inventor
Manuel Fernandez Carmona
Cristina URDÍALES GARCÍA
Jose Carlos Del Toro Lasanta
Francisco SANDOVAL HERNÁNDEZ
Blanca Fernandez Espejo
María Isabel SÁNCHEZ TATO
Original Assignee
Universidad De Malaga
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Publication of WO2009063114A1 publication Critical patent/WO2009063114A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information

Definitions

  • the present invention falls within the field of radio frequency identification.
  • the invention also falls within the scope of support applications for blind people, as far as home adaptation is concerned.
  • An invention is proposed that brings together the functions of locating and identifying elements in a home by means of RFID, and that is adapted to the needs that determine a visual disability.
  • RFID electronic book reader
  • RFID technology is applied to object tracking, as set forth in WO / 2004/008387, where a system for the tracking and control of medications by RFID is described.
  • Each prescription has an associated label that relates it to a database, where data is collected from it. These data are consulted by the different readers who wish so.
  • Document US20070013541 proposes a system for managing the inventory of a laboratory, where each piece of equipment has an RFID tag. When a piece is saved, it is automatically scanned by one of the readers of each cabinet, which are fixed, and their data updated in the database.
  • document WO / 2007/072389 describes an indoor guidance system for the blind that can use RFID tags as beacons, and also contains additional information on elements of interest, associated with the map of the specific implementation.
  • This beaconing is done on a larger scale in WO / 2005/071597, where RFID tags are deployed forming a mesh in the ground.
  • These labels store information regarding nearby fixed objects, as well as additional details of their location. This solution implies that the information that can be stored is limited, and can easily become obsolete if the objects are moved next to the labels.
  • Document WO / 2004/059598 describes an audio object description system for the blind that relies on RFID tagging to identify the elements.
  • the user It carries an RPID reading antenna in the hand, and at its simple contact with the object, it is identified by an acoustic signal.
  • the proposed invention improves the solutions set forth above, focusing on their proper use by blind people, with the possibility of activating an acoustic signaling system. It covers the ideas of identification by RPID and management of locations of objects through a database. This database, either local or remote, is kept updated autonomously, providing the memory system.
  • a single mobile RPID reader and antenna is used, whose specific use in the home (indoor) simplifies their realization and the associated cost since they are the most expensive part of the RPID system.
  • the installation costs are reduced to those derived from adhering the standard RPID tags of UHF frequencies to the different household objects and their inclusion in the location database.
  • the process of creating the database will be dynamic, being possible after the initial installation, add or remove elements from the database, as required.
  • the user carries a mobile device with process capacity and reading ability
  • RFID which will autonomously detect tagged objects, and dynamically update the location stored in the database, which may be local to the mobile or remote device, in which case it will be accessed by wireless means.
  • the mobile device will be adapted to the needs of the blind, to allow proper communication of commands verbally or by keyboard.
  • the mobile device will respond verbally, with the last location stored in the database.
  • Another possibility is that in the same home there are two or more blind people, each with their mobile device, and they share the location database, which will be remote to the devices.
  • Figure l.- s The elements that make up the invention are shown, interacting in the database update mode. Objects labeled (1) (2) (3) (4) (5) detected by the RFID reader (10) of the mobile device (s) (12) are stored in the database.
  • Figure 2. The scenario in which the user (9) needs to know the location of an element is shown. Enter the search data on the mobile device (12) either orally (13) or using the keyboard (14). A query will be made in the database (7) and the user will be presented with the response from the last known location (8), in an appropriate manner (11).
  • Figure 3. Shows the scenario in which the user activates an alarm that will be triggered when the object sought is within the detection field of the RFID reader (10).
  • FIG. 4 Diagram of the mobile device with RFID capability: UHF RFID reader card with antenna (10), mobile device with process capability (12) (with wireless connectivity if using remote database mode), output interface (11), audio input interface (13), keyboard (14).
  • the present invention constitutes a variant of an inventory management system.
  • the inventoried elements are identified by standard RFID tags of UHF frequencies. These tags will be passive or active (that is, they will drain energy from the reader or have their own battery), as deemed necessary to increase the detection range of the object to which they are fixed or not.
  • tags are detected by the antenna of the portable RFID reader card, which is integrated into a mobile device with commercial process capability. This device will be in charge of processing the identity of the detected tags, and storing it in the location database.
  • the database can be remote, so that the data that is dumped is shared by the different devices.
  • the user can make inquiries to determine the location of specific elements, using the keyboard or audio interface. Another possibility is to set alarms, which will be triggered when the object being searched enters the detection area of the RFID reader.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention relates to RFID-based object tracking for the visually impaired. The invention uses a mobile RFID reader which is built into a mobile device having a processing capacity and adapted for the visually impaired, with the aim of locating objects and areas of interest in the home using active and passive UHF RFID tags. Three categories of tagged elements can be distinguished: fixed, semi-static and dynamic. Upon detection of tags close to the antenna, an association (object, location) is made in the database which may be located locally in relation to the device or remotely, so that multiple mobile devices can access same. The invention has three operating modes: normal, in which the database is updated regularly with locations; query, in which the name of the object is indicated and the last location in which said object was detected is supplied; and search, in which an alarm is activated if the object is detected.

Description

Título Title
Seguimiento de Objetos para Invidentes Basado En RFIDObject Tracking for the Blind Based on RFID
Sector técnicoTechnical sector
La presente invención se encuadra en el sector de la identificación mediante radiofrecuencia. La invención se enmarca asimismo en el ámbito de las aplicaciones de soporte para personas invidentes, en lo que adaptación del hogar se refiere.The present invention falls within the field of radio frequency identification. The invention also falls within the scope of support applications for blind people, as far as home adaptation is concerned.
Técnica anteriorPrior art
Habitualmente en los hogares en los que reside un invidente, la orientación y la localización del mobiliario y los objetos se basa únicamente en la rutina. Sin embargo, cuando varias personas conviven, y sólo alguna(s) de ellas padece una deficiencia visual, este mecanismo puede tornarse bastante ineficaz.Usually in homes where a blind person resides, the orientation and location of furniture and objects is based solely on routine. However, when several people live together, and only some of them suffer from a visual impairment, this mechanism can become quite ineffective.
Se propone una invención que reúna las funciones de localización e identificación de elementos en un hogar mediante RFID, y que se encuentre adaptada a las necesidades propias que determina una minusvalía visual. Actualmente existen diversas soluciones de localización basadas, en parte o en su totalidad, en RFID. Algunas están enfocadas al seguimiento e identificación de personas apoyándose en datos biométricos.An invention is proposed that brings together the functions of locating and identifying elements in a home by means of RFID, and that is adapted to the needs that determine a visual disability. There are currently several location solutions based, in part or in full, on RFID. Some are focused on tracking and identifying people based on biometric data.
Más comúnmente se aplica la tecnología RFID al seguimiento de objetos, tal y como se expone en el documento WO/2004/008387, donde se describe un sistema para el seguimiento y control de medicamentos mediante RFID. Cada prescripción tiene asociada una etiqueta que la relaciona con una base de datos, donde se recogen los datos del mismo. Estos datos son consultados por los diferentes lectores que así lo deseen.Most commonly, RFID technology is applied to object tracking, as set forth in WO / 2004/008387, where a system for the tracking and control of medications by RFID is described. Each prescription has an associated label that relates it to a database, where data is collected from it. These data are consulted by the different readers who wish so.
El documento US20070013541 propone un sistema para la gestión del inventario de un laboratorio, donde cada pieza de equipo tiene una etiqueta RFID. Cuando una pieza se guarda, es automáticamente escaneada por uno de los lectores de cada armario, que se encuentran fijos, y actualizados sus datos en la base de datos.Document US20070013541 proposes a system for managing the inventory of a laboratory, where each piece of equipment has an RFID tag. When a piece is saved, it is automatically scanned by one of the readers of each cabinet, which are fixed, and their data updated in the database.
Similarmente, en el documento US20050270158, se presenta una solución para el seguimiento de elementos móviles (bien objetos o personas) a medida que atraviesan zonas de interrogación concretas, donde se encuentran instalados los lectores de forma fija. Más concretamente aplicado al hogar, está el sistema US 20060190538, en el que se etiquetan los elementos del hogar, y se dota a los enchufes de lectores RFID, constituyendo así una red que permite un conocimiento en tiempo real de la ubicación de los objetos en la casa desde un servidor central. Estos sistemas prestan unas funcionalidades básicas de localización. Las capacidades de localización pueden ser extendidas almacenando la información actualizada de la última posición conocida de los objetos. Esto ya se plantea en el documento US20060208925, en el que un lector móvil de RFID va actualizando la posición de los elementos etiquetados en su rango, utilizando la información de posicionamiento proporcionada por un sistema GPS. Específicamente en apoyo a invidentes, las tecnologías RFID también tienen una clara aplicación como sistemas de guía.Similarly, in document US20050270158, a solution for tracking mobile elements (either objects or people) is presented as they cross specific question areas, where readers are permanently installed. More specifically applied to the home, is the system US 20060190538, in which the household items are labeled, and the RFID reader plugs are provided, thus constituting a network that allows real-time knowledge of the location of objects in the house from a central server. These systems provide basic location features. The location capabilities can be extended by storing the updated information of the last known position of the objects. This is already stated in document US20060208925, in which a mobile RFID reader is updating the position of the elements labeled in its range, using the positioning information provided by a GPS system. Specifically in support of the blind, RFID technologies also have a clear application as guidance systems.
Por ejemplo, el documento WO/2007/072389 describe un sistema de guía en interiores para invidentes que puede utilizar etiquetas RFID a modo de balizas, y conteniendo además información adicional sobre elementos de interés, asociados al mapa de la implementación concreta.For example, document WO / 2007/072389 describes an indoor guidance system for the blind that can use RFID tags as beacons, and also contains additional information on elements of interest, associated with the map of the specific implementation.
En el documento WO/2006/045819, donde se disponen etiquetas RFID en las aceras a unas distancias prefijadas, y que están asociadas a una ubicación espacial en una base de datos previamente conocida.In WO / 2006/045819, where RFID tags are arranged on sidewalks at predetermined distances, and which are associated with a spatial location in a previously known database.
Este balizamiento se realiza a mayor escala en el documento WO/2005/071597, donde las etiquetas RFID se despliegan conformando una malla en el suelo. En estas etiquetas se almacena información referente a los objetos fijos cercanos, así como detalles adicionales de su ubicación. Esta solución implica que la información que se puede almacenar está limitada, y puede quedar obsoleta fácilmente si se desplazan los objetos junto a las etiquetas.This beaconing is done on a larger scale in WO / 2005/071597, where RFID tags are deployed forming a mesh in the ground. These labels store information regarding nearby fixed objects, as well as additional details of their location. This solution implies that the information that can be stored is limited, and can easily become obsolete if the objects are moved next to the labels.
Otro sistema basado en el mismo principio, pero pensado para exteriores es el que se expone en el documento WO/2006/065430, donde se utilizan las etiquetas RFID para definir un camino que puede ser seguido por el invidente gracias a los receptores RFID que lleva instalados en el bastón y tobillos. Este guiado se combina con tecnologías GPS, y servicios WWW.Another system based on the same principle, but intended for outdoor use is the one set out in document WO / 2006/065430, where RFID tags are used to define a path that can be followed by the blind thanks to the RFID receivers that it carries installed on the cane and ankles. This guidance is combined with GPS technologies, and WWW services.
El uso de tecnologías de posicionamiento como GPS en sistemas de guía para invidentes es una solución que ya se ha usado en otros sistemas, tales como el descrito en US20050140544, que combina los datos recibidos por el GPS con información adicional recabada de Internet mediante protocolos inalámbricos.The use of positioning technologies such as GPS in guidance systems for the blind is a solution that has already been used in other systems, such as the one described in US20050140544, which combines the data received by GPS with additional information collected from the Internet through wireless protocols .
En el documento WO/2004/059598 se describe un sistema audio descripción de objetos para invidentes que se apoya en el etiquetado RFID para identificar los elementos. El usuario porta una antena lectora de RPID en la mano, y al simple contacto de ésta con el objeto, se identifica mediante una señal acústica.Document WO / 2004/059598 describes an audio object description system for the blind that relies on RFID tagging to identify the elements. The user It carries an RPID reading antenna in the hand, and at its simple contact with the object, it is identified by an acoustic signal.
La invención propuesta mejora las soluciones anteriormente expuestas, enfocándolas a su adecuado uso por parte de invidentes, con la posibilidad de activar un sistema de señalización acústica. Abarca las ideas de identificación por RPID y gestión de localizaciones de los objetos mediante base de datos. Esta base de datos bien local o remota, se mantiene actualizada de forma autónoma, dotando al sistema de memoria.The proposed invention improves the solutions set forth above, focusing on their proper use by blind people, with the possibility of activating an acoustic signaling system. It covers the ideas of identification by RPID and management of locations of objects through a database. This database, either local or remote, is kept updated autonomously, providing the memory system.
Se utiliza un único lector móvil RPID y antena, cuyo uso específico en el hogar (interiores) simplifica la realización de los mismos y el coste asociado puesto que son la parte más costosa del sistema RPID.A single mobile RPID reader and antenna is used, whose specific use in the home (indoor) simplifies their realization and the associated cost since they are the most expensive part of the RPID system.
El uso de tres categorías de etiquetas permite discriminar de forma sencilla las asociaciones en la base de datos. Además se propone el uso de etiquetas de frecuencias de UHF, lo que hace que el alcance de lectura sea de entre uno y tres metros, eliminando la necesidad de contacto físico o de gran proximidad. Este alcance es ajustable, al utilizar tanto etiquetas activas como pasivas.The use of three categories of labels makes it easy to discriminate associations in the database. In addition, the use of UHF frequency tags is proposed, which makes the reading range between one and three meters, eliminating the need for physical contact or close proximity. This range is adjustable, when using both active and passive labels.
Divulgación de la invenciónDisclosure of the invention
Mientras que las aplicaciones destinadas a los colectivos con diferentes minusvalías adolecen de altos costes, la presente invención ofrece una solución económicamente competitiva.While applications for groups with different disabilities suffer from high costs, the present invention offers an economically competitive solution.
Los costes de instalación se reducen a los derivados de adherir las etiquetas RPID estándar de frecuencias UHF a los diferentes objetos del hogar y su inclusión en la base de datos de localizaciones.The installation costs are reduced to those derived from adhering the standard RPID tags of UHF frequencies to the different household objects and their inclusion in the location database.
Se distinguen tres categorías de objetos etiquetados:There are three categories of labeled objects:
- estáticos, que permanecerán siempre en su lugar y que constituyen las principales referencias espaciales, por ejemplo, puertas, paredes ... ;- static, which will always remain in place and that constitute the main spatial references, for example, doors, walls ...;
- semiestáticos que normalmente están en el mismo lugar, pero son susceptibles de ser desplazados, siendo una referencia espacial menos fiable, por ejemplo, muebles; - dinámicos, que son los elementos que habitualmente serán objeto de búsqueda.- semi-static that are normally in the same place, but are likely to be displaced, being a less reliable spatial reference, for example, furniture; - dynamic, which are the elements that will usually be searched.
El proceso de creación de la base de datos será dinámico, siendo posible tras la instalación inicial, añadir o eliminar elementos de la base de datos, según se requiera. El usuario porta un dispositivo móvil con capacidad de proceso y capacidad lectoraThe process of creating the database will be dynamic, being possible after the initial installation, add or remove elements from the database, as required. The user carries a mobile device with process capacity and reading ability
RFID, que detectará de forma autónoma los objetos etiquetados, y actualizará dinámicamente la ubicación almacenada en la base de datos, que podrá ser local al dispositivo móvil o remota, caso en el que se accederá a ella por medios inalámbricos. El dispositivo móvil estará adaptado a las necesidades propias del invidente, para permitir la adecuada comunicación de comandos de forma verbal o mediante teclado.RFID, which will autonomously detect tagged objects, and dynamically update the location stored in the database, which may be local to the mobile or remote device, in which case it will be accessed by wireless means. The mobile device will be adapted to the needs of the blind, to allow proper communication of commands verbally or by keyboard.
A los comandos de búsqueda, el dispositivo móvil responderá de forma verbal, con la última ubicación almacenada en la base de datos.To search commands, the mobile device will respond verbally, with the last location stored in the database.
Será también posible fijar una alarma sonora, que se disparará cuando un objeto se encuentre en el campo de detección del lector RPID, lo que permitirá buscar objetos en ubicaciones desconocidas a priori, o evitar obstáculos que hayan sido desplazados.It will also be possible to set an audible alarm, which will be triggered when an object is in the detection field of the RPID reader, which will allow you to search for objects in unknown locations a priori, or avoid obstacles that have been displaced.
Otra posibilidad es que en el mismo hogar existan dos o más invidentes, cada uno con su dispositivo móvil, y compartan la base de datos de ubicaciones, que será remota a los dispositivos.Another possibility is that in the same home there are two or more blind people, each with their mobile device, and they share the location database, which will be remote to the devices.
Descripción de las figurasDescription of the figures
Figura l.-s Se muestran los elementos que componen el invento, interactuando en el modo de actualización de base de datos. Los objetos etiquetados (1) (2) (3) (4) (5) detectados por el lector RFID (10) del dispositivo(s) móvil(es) (12) son almacenados en la base de datos.Figure l.- s The elements that make up the invention are shown, interacting in the database update mode. Objects labeled (1) (2) (3) (4) (5) detected by the RFID reader (10) of the mobile device (s) (12) are stored in the database.
Figura 2.- Se muestra el escenario en que el usuario (9) necesita conocer la ubicación de un elemento. Introduce los datos de la búsqueda en el dispositivo móvil (12) bien de forma oral (13) o mediante el teclado (14). Se realizará una consulta en la base de datos (7) y se le presentará al usuario la respuesta de la última ubicación conocida (8), de forma apropiada (11). Figura 3.- Muestra el escenario en que el usuario activa una alarma que se disparará cuando el objeto buscado se encuentre dentro del campo de detección del lector RFID (10).Figure 2.- The scenario in which the user (9) needs to know the location of an element is shown. Enter the search data on the mobile device (12) either orally (13) or using the keyboard (14). A query will be made in the database (7) and the user will be presented with the response from the last known location (8), in an appropriate manner (11). Figure 3.- Shows the scenario in which the user activates an alarm that will be triggered when the object sought is within the detection field of the RFID reader (10).
Figura 4.- Esquema del dispositivo móvil con capacidad RFID: tarjeta lectora de RFID UHF con antena (10), dispositivo móvil con capacidad de proceso (12) (con conectividad inalámbrica si utiliza el modo de base de datos remota), interfaz de salida (11), interfaz de entrada audio (13), teclado (14).Figure 4.- Diagram of the mobile device with RFID capability: UHF RFID reader card with antenna (10), mobile device with process capability (12) (with wireless connectivity if using remote database mode), output interface (11), audio input interface (13), keyboard (14).
Maneras de realización de la invenciónWays of carrying out the invention
A continuación se explican modos de realización de la invención de carácter no limitativo: El presente invento constituye una variante de un sistema de gestión de inventariado. Los elementos inventariados, son identificados por etiquetas estándar RFID de frecuencias UHF. Estas etiquetas serán de tipo pasivo o activo (esto es, drenarán energía del lector o tendrán su propia batería), según se considere necesario aumentar el alcance de detección del objeto al que estén fijadas o no.Embodiments of the invention of a non-limiting nature are explained below: The present invention constitutes a variant of an inventory management system. The inventoried elements are identified by standard RFID tags of UHF frequencies. These tags will be passive or active (that is, they will drain energy from the reader or have their own battery), as deemed necessary to increase the detection range of the object to which they are fixed or not.
Se distinguen tres tipos de objetos etiquetados, según su movilidad. Primeramente tenemos objetos estáticos, que constituyen referencias espaciales del hogar y que pueden identificar zonas de la casa y no objetos necesariamente; semiestáticos, que son objetos que normalmente no cambian de ubicación y dinámicos, que si pueden ser fácilmente desplazados. Estas etiquetas son detectadas por la antena de la tarjeta lectora RFID portátil, que se encuentra integrada en un dispositivo móvil con capacidad de proceso comercial. Este dispositivo será el encargado de procesar la identidad de las etiquetas detectadas, y almacenarlo en la base de datos de ubicaciones.There are three types of labeled objects, depending on their mobility. First we have static objects, which constitute spatial references of the home and that can identify areas of the house and not necessarily objects; semi-static, which are objects that normally do not change location and dynamic, which can be easily displaced. These tags are detected by the antenna of the portable RFID reader card, which is integrated into a mobile device with commercial process capability. This device will be in charge of processing the identity of the detected tags, and storing it in the location database.
Es posible considerar un escenario en el que varios dispositivos móviles estén activos en un mismo hogar, por lo que en ese caso, la base de datos puede ser remota, para que los datos que a ella se vuelcan sean compartidos por los diferentes dispositivos.It is possible to consider a scenario in which several mobile devices are active in the same home, so in that case, the database can be remote, so that the data that is dumped is shared by the different devices.
Además del proceso de funcionamiento autónomo del dispositivo móvil, el usuario puede realizar consultas para determinar la ubicación de elementos concretos, mediante el interfaz de teclado o audio. Otra posibilidad es la de establecer alarmas, que se dispararán cuando el objeto que se busca entre en el área de detección del lector RFID. In addition to the autonomous operation process of the mobile device, the user can make inquiries to determine the location of specific elements, using the keyboard or audio interface. Another possibility is to set alarms, which will be triggered when the object being searched enters the detection area of the RFID reader.

Claims

Reivindicaciones Claims
1. Sistema para la localización de objetos en interiores basado en RPID caracterizado porque comprende un conjunto de etiquetas UHF RPID, un lector RPID integrado en un dispositivo móvil adaptado para su uso por invidentes, y una base de datos de localizaciones de objetos.1. System for the location of indoor objects based on RPID characterized in that it comprises a set of UHF RPID tags, an RPID reader integrated in a mobile device adapted for blind use, and a database of object locations.
2. Sistema para la localización de objetos según la reivindicación anterior caracterizado por comprender dos o más terminales móviles que comparten la base de datos de localizaciones de objetos.2. System for locating objects according to the preceding claim characterized by comprising two or more mobile terminals that share the database of object locations.
3. Sistema para la localización de objetos según cualquiera de las reivindicaciones anteriores caracterizado porque comprende etiquetas RFID tanto activas como pasivas.3. System for locating objects according to any of the preceding claims characterized in that it comprises both active and passive RFID tags.
4. Sistema para la localización de objetos según reivindicación anterior caracterizado porque la base de datos es, o bien local al terminal móvil que porta el invidente, o bien remota a él y se accede a ella mediante un protocolo inalámbrico.4. System for locating objects according to the preceding claim, characterized in that the database is either local to the mobile terminal carrying the blind, or remote to it and is accessed through a wireless protocol.
5. Terminal móvil adaptado para invidentes para ser utilizado en el sistema descrito según cualquiera de las reivindicaciones 1 a 4 caracterizado por comprender un lector de etiquetas RFID y presentar capacidad de gestión de bases de datos de ubicaciones.5. Mobile terminal adapted for the blind to be used in the system described according to any of claims 1 to 4 characterized by comprising an RFID tag reader and presenting location database management capability.
6. Terminal móvil adaptado para invidentes para ser utilizado en el sistema descrito según cualquiera de las reivindicaciones 1 a 4 de acuerdo con la reivindicación anterior caracterizado por presentar capacidad de conexión inalámbrica para gestionar una base de datos remota. 6. Mobile terminal adapted for the blind to be used in the system described according to any of claims 1 to 4 according to the preceding claim characterized by presenting wireless connection capability to manage a remote database.
PCT/ES2008/000710 2007-11-16 2008-11-13 Rfid-based object tracking for the visually impaired WO2009063114A1 (en)

Applications Claiming Priority (2)

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ESP200703079 2007-11-16
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GB2527095A (en) * 2014-06-11 2015-12-16 Cygnus Instr Ltd Location-aware thickness gauge
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