ES2354549B1 - ELECTRONIC EQUIPMENT FOR THE IDENTIFICATION, CONTROL AND SECURITY OF GROUPS OF INDIVIDUALS IN MOBILITY. - Google Patents

Abstract

Electronic equipment for the identification, control and security of groups of individuals in mobility, comprising identification wristbands (one per group member) with RFID tag for periodic sending of identification signals, SD card and mobile device with SD slot for reception of the radio frequency identification signals sent by the wristbands and data processing contained therein. The mobile device is a PDA or UMPC or another, capable of receiving signals continuously, discriminating the power, discerning if it is meters centimeters, what signals it receives, making listings, notifying if one or more have not been received, implementing search and identifying one and display data. # In addition, a PC computer is contemplated with which the mobile device synchronizes, equipped with an application and repository for the management of data of individuals and wristbands and their relationships.

Description

(Passive RFID), or locate people in an area

Electronic equipment for the identification, control and security of groups of individuals in mobility. Object of the invention

The invention, as stated in the present specification, refers to an electronic device for the identification, control and security of groups of individuals in mobility, contributing to the function to which significant advantages and novelty characteristics are destined, as opposed to to other systems currently known in the market for the same purpose.

More particularly, the object of the invention is focused on a device of electronic devices that, being applicable for groups of children, elderly, disabled, tourists, etc. on excursions, guided tours, leisure trips, camps, or other activities that require the mobility of the group, and being basically formed by a mobile device controlled by the person responsible for the group and a plurality of devices with RFID tag (Radio Frequency acronym) Identi fi cation, in Spanish Radio Frequency Identi fi cation), preferably constituted by bracelets, which each of the individuals in the group are carrying, is intended to constitute a system for the identification, control and security of said group of individuals in such mobility circumstances. in a continuous and autonomous way, allowing the person responsible for that group to have at all times controlled each and every one of the members of the group, both globally and individually, allowing, in addition, among other advantages, to access additional information on different aspects of each of these individuals. Field of application of the invention

The field of application of the present invention falls within the technical sector of radiofrequency identification technologies, applied to the safety of groups of people in mobility. These technologies are commonly known as RFID (Radio Frequency Identification). Background of the invention

As is known, RFID (acronym for Radio Frequency Identification, in Spanish Radio Frequency Identification) is a remote data storage and retrieval system that uses devices called RFID tags, transponders or tags. The fundamental purpose of RFID technology is to transmit the identity of an object (similar to a unique serial number) using radio frequency waves. RFID technologies are grouped into the so-called Auto ID (Automatic Identification, or Automatic Identification).

An RFID tag is a small device, similar to a sticker, that can be attached or incorporated into a product, animal or person. They contain antennas to allow them to receive and respond to requests by radiofrequency from an RFID transmitter-receiver, often referred to as RFID readers. Passive tags do not need internal power, while active tags do, usually using a battery to do so. One of the advantages of the use of radiofrequency (instead, for example, of infrared technology) is that direct vision between transmitter and receiver is not required.

Systems are appearing on this technology (active RFID), providing more common solutions

Full traceability and safety.

In the state of the art we find:

-

Systems for tracking people with fixed infrastructures and based on active RFID: Utility Model ES 1064033 U, Patent ES 2303465. They consist mainly of an infrastructure of readers and antennas placed in the areas of passage of people, which carry a card Active RFID that is identi fi ed when the person passes through the area with antennas. They allow a certain distance (typically a few meters) between tag and antenna for proper identification.

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Systems for object identification based using mobile readers: patent PI 0700437, ES 2159502. It is a component of a mobile device that acts as an RFID reader that allows, at greater (active RFID) or less (passive RFID) distance, the control mainly of objects.

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Systems based on the detection of remoteness of objects: patent PI 0700437. Systems that detect the removal of an object from a central reader.

-

Systems for object safety: patent ES 2280888. Systems based on RFID to prevent theft of objects.

Therefore RFID technology is combined differently to offer different solutions:

-

Infrastructure of antennas and fixed readers for pass-through identification of passive (active user) or active RFID tags (for automatic detection of the passage of people and objects). It allows traceability and / or the location of people and objects.

-

Use of mobile RFID readers, mainly used by individuals, for the identification of people and objects mainly using passive RFID tags and by approaching the RFID reader.

-

Use of fixed and mobile RFID readers to detect the removal of active RFID tags, for security purposes against theft.

The combination and different use of RFID technology offers various solutions to problems of identification, traceability, location, control, security, etc., of objects and people, however, no document has been found in the state of the art or patent that, as the invention advocated herein, gives solution to the following generic situation:

-

Group of individuals in charge of one person (or several), responsible for their safety in certain time periods.

-

Both the group and the person in charge have geographic mobility at any level (within a building, outdoor enclosure, unbounded space, movements between different geographical points, etc.).

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The individuals of the group are exposed to being lost, wanting to escape from the group's discipline, being forgotten in a place when the group has abandoned it, or their identification is necessary for access to relevant data (identifying, medical, environmental data). family, contact, etc.).

The objectives of the present invention are therefore:

-

The distance identi fi cation (meters) of the individuals by the person responsible for:

* Control of the presence of the individuals of the group both punctual (group listings, at the request of the person in charge) and continuous (security radio, autonomously if need for interaction by the person in charge)

* Search for lost individuals

-

The short distance identification (centimeters) of the individuals by the person responsible for:

* Univocal identification of the individual

* Access to critical data (doctors, family environment) for security in situations such as possible allergies to food, environment or medication, collection by unauthorized persons, etc.

The current state of the art does not solve all the challenges presented to cover the situation described:

-

Allow to discriminate between distance identification (meters) of individuals and identification by approach (centimeters) of the RFID reader or receiver to the identification tag or bracelet. RFID technology is designed for identification without discriminating distance. A system identifies or not, regardless of distance, only in the event of reception in an RFID reader or not of the signal sent by a tag.

-

Allow continuous identification over time and mobility of all system components.

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Manage identification and information for the control of timely and continuous presence.

Thus, on the part of the applicant, it is unknown the existence of any other invention that has similar technical, structural and con fi guration characteristics to those presented by the electronic equipment for the identification, control and security of groups of individuals in mobility mentioned here. , whose characterizing and distinctive details regarding what is already known are developed in detail below and are conveniently included in the final claims that accompany the present specification. Explanation of the invention.

Thus, and as indicated above, the invention advocates electronic equipment for the identification, control and security of groups of individuals in mobility which constitutes a tool for the location, identification and security of a group of individuals in mobility. continuously and autonomously, allowing a person to have at all times controlled each and every one of the people in the group.

The equipment is intended to be applied in the care of groups (children, elderly, disabled ...) in excursions, guided tours, group trips, camps, leisure places, etc., avoiding the risk of any of the components of the group can get lost, in addition to having a database of interest of each person.

For this, the equipment basically comprises a mobile device, consisting of a PDA or a UMPC, with which the person responsible for the group works and is equipped with an SD-type memory card, and a plurality of devices with transceiver or RFID tag, preferably made up of wristbands, which each of the individuals in the group carry, including a PC in which a computer application and a repository is incorporated to allow the administration of individuals, groups, and the assignment of wristbands, as well as the possibility of managing information from different group managers, access permissions to information, etc. The mobile device is able to synchronize the information managed on the PC for later use.

Thus, for example, in a possible use of the equipment, in which a group of children goes on an excursion, a monitor or group leader has a mobile device (PDA or UMPC) while the children wear a bracelet each. The bracelet periodically emits an identifying signal received by the mobile device if they are in a range of about 20 meters.

Thanks to the continuous reception of the identification of the wristbands the monitor accesses different functionalities:

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Control of lists: the person in charge can make an entry list of the children at the beginning of the excursion, check at any time that all the children are in a nearby radius and at the end of the excursion make a check-out of the members. For this, the person in charge with the press of a button can “go through the list” so that the mobile device identifies all the bracelets that are around.

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Individual Control: In addition to the “group” list control explained above, a one-to-one list of users with a bracelet can also be made, bringing the mobile device closer to each child's bracelet.

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Individual Information: the monitor, bringing the mobile device closer to the bracelet, will be able to access data related to the user of the bracelet (name, surname, information of interest, such as people authorized to pick up a child, medical data, etc. .).

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Safety Radio: the mobile device may notify the monitor if any of the children has not been detected for a certain period of time (for example 2 minutes), to prevent a child from being lost.

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Searching for a child: the monitor can select a child so that the mobile device searches for the signal of a child that may have been lost.

In addition to the features described, there is a PC application that allows the administration of individuals, groups, and the assignment of wristbands, as well as the possibility of managing information from monitors, access to information permits, etc. The mobile device is able to synchronize the information managed on the PC for later use described in the previous points.

Additionally, the possibility of incorporating into the equipment is contemplated, provided that the circumstances allow it to be particularly optimal for indoor use, one or several fixed beacons in the area to be monitored, thus achieving greater coverage and even the advantage of being able to locate in certain defined areas where each bracelet is located at each moment.

In summary, the advantages of the invention over the current state of the art are essentially the following:

It is an electronic radiofrequency based mobile identification device comprising a plurality of small identification bracelets (one for each group member) provided with an RFID tag for the periodic sending of identification signals and a mobile device that allows, by means of the use of an SD (secure digital) memory card, the reception of the RF identification signals sent by the identification wristbands, as well as the data processing.

In addition, the existence of a PC computer is contemplated, for the management of the data of the individuals and of the identification bracelets and their relationships.

The above mobile device can be a PDA

or UMPC (Ultra Mobile PC) or any portable device with SD card slot being able to receive the identification signals of one or more identification bracelets, as well as to discriminate the power of the received identification signals, being able to discern whether it is at meters or centimeters per threshold of power of the received signals.

It should also be noted that the mobile device can continuously receive the identification signals without the need for interaction by the responsible user, it is synchronized with the information on the computer.

The mobile device, through the SD card, can discern in a timely manner that identification signals of the received bracelets are within its coverage radius to know which bracelets (or individuals that carry them) to know if any are missing, being able to make group listings of Individual entry, punctual, and exit.

The mobile device can notify you if one or more bracelets have not been received within a certain time (safety radio).

In addition, thanks to the SD card and the possibility of discriminating the power of the signals, it implements the search for one or more bracelets (or individuals that carry them).

The mobile device allows, by means of the possibility of discerning if the bracelet is centimeters from said device, to identify a bracelet and to show the data (personal, medical, environment, etc.) corresponding to the individual who wears it.

The described electronic equipment for the identification, control and safety of groups of individuals in mobility represents, therefore, an innovative structure of structural and constitutive characteristics unknown until now for this purpose, reasons that together with its practical utility, provide it with a sufficient basis for obtain the privilege of exclusivity that is requested. Description of the drawings

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, this descriptive report is attached, as an integral part thereof, of a set of drawings, in which with character Illustrative and not limiting, the following has been represented:

Figure 1 shows a schematic representation of the three basic elements of the equipment object of the invention and their interactions: identification bracelets, which send the identification signal, received by mobile devices, which can synchronize the information with the PC . Preferred Embodiment of the Invention

In view of the aforementioned figures, and in accordance with the numbering adopted therein, it is observed how the device in question comprises the following elements:

A plurality of wristbands (1) with RFID tag, a mobile device (2) with SD card and a PC (3).

The PC (3) is a personal computer where the system management software is installed, for which it is equipped with an application where all the devices and users of the system can be managed, as well as a data repository that will include the data of the application.

On the other hand, the mobile device (2) can be constituted by a PDA or by a UMPC (ultra portable PC with or without keyboard) and, by means of the SD memory card, it will allow the control of the wristbands (1) according to the configuration performed in the PC application (3), so that it will allow the visualization of the data and the control of the wristbands (1) with the corresponding functionalities, while the data repository contains a replica of the PC database (3).

The mobile device (2) PDA or UMPC, as depicted in Figure 1, synchronizes the data of the database managed on the PC (3), so that, from the identification signals sent by the wristbands ( 1) and data from the data repository can offer the functionalities of list control, control and individual identification, search and security radio.

As for the wristbands (1), each one has a PCB (Printed Circuit Board or printed circuit board) as a support for a transceiver or RFID tag, that is, a radio frequency based on the IEEE 802.15.4 standard ( such as the Texas Instruments CC2430 type) plus the additional components necessary for its operation (2 crystals for the clocks, decoupling capacitors, polarization resistors, adaptation for the RF port and antenna).

The antenna is, for example, a microstrip antenna adapted by a commercial balun.

The entire device is powered through a battery holder for a button cell.

Each bracelet (1) sends an identification frame, containing the information of the MAC address of the radio frequency transceiver chip or RFID tag and the battery value, remaining between frame and frame in low power mode.

For this, the bracelet fi rmware consists of four differentiated blocks:

-

Radio frequency control

-

Timing of location frames

-

Button control

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Battery control

-

The radiofrequency control block is responsible for sending ZigBee frames.

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The location frame timing block is responsible for randomizing the time between frames to avoid collisions and assembles the location frame to be sent. It also includes the battery level data in the frame.

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The button control block executes the interruption attention routine when the bracelet button is pressed.

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The battery control block monitors the battery level and determines if that value is above the minimum value for bracelet operation.

For its part, the SD type memory card that the mobile device has (2) is, for example, a ZigBee-SDIO card, and consists of a PCB as a support, for example a Texas Instruments CC2430, plus additional components necessary for its operation (2 crystals for watches, decoupling capacitors, polarization resistors, adaptation for the RF port and antenna).

The antenna is, for example, a microstrip antenna adapted by a commercial balun.

The device is powered through the SD interface when it is inserted into the Host slot, that is, the mobile device (2).

The mobile device fi rmware (2) consists of two distinct blocks:

-

RF control

-

SDIO interface control

The radio frequency control block is responsible for receiving ZigBee frames. When a frame is stored and an event is generated in the control block of the SDIO interface so that it generates an interruption to the host.

The control block of the SDIO interface manages communications through the SD interface generating the responses to the commands received.

In the event that the mobile device (2) is a PDA, this one, whose only requirement will be that it has an operating system compatible with the application of the PC and contains slot for the SD memory card, thanks to the continuous reception of the Identification of the bracelets (1), offers the following functionalities:

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List control: allows you to make an entry list of the wearers of the bracelet (1), check at any time that all the wearers of the bracelet are in a nearby radius and an exit record of the members.

-

Individual Control: In addition to the “group” list control explained above, a one-to-one listing of the wristband carriers can also be made, bringing the mobile device closer to each bracelet.

-

Individual Information: the monitor, bringing the mobile device closer to the bracelet, will be able to access data related to the user of the bracelet (name, surname, information of interest, such as people authorized to pick up a child, medical data, etc. .).

-

Safety Radio: the mobile device may notify the monitor if any of the children have not been detected for a certain period of time (for example 5 minutes), to prevent a child from being lost.

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User search with bracelet: allows you to select a user with bracelet so that the mobile device searches for the signal of a child that may have been lost.

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Synchronization with the PC database: allows synchronizing the data of the PC database managed by the application so that the data on the wristbands, the bearers of the wristbands, and their relationships are available on the PDA.

The same features offered in the PDA are offered for small computers such as UltraMobilePC (UMPC). Therefore, through the UMPC it is also possible to perform:

-

List Control

-

Individual control

-

Individual Information

-

Search

-

Security radio

Any market UMPC that has a 7-inch screen, compatible operating system and SD slot can be used.

The application of the PC, meanwhile, allows the management of users carrying the bracelets and bracelets offering:

-

User management: allows you to create, modify and delete user data.

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Group management: allows users to be managed in groups.

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Bracelet management: allows you to create, modify and delete the data of the system bracelets.

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Assignment of wristbands to users: allows the assignment of wristbands to users for their subsequent relationship in the identification and other functionalities offered in the PDA and the UMPC.

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Synchronization: to allow data synchronization.

Finally, it should be noted that, in addition, the incorporation into the team of one or more beacons (not represented in the fi gures) fixed in the area to be monitored is contemplated, aimed at achieving greater coverage and being able to locate in certain defined areas where each bracelet at each moment, being formed by a PCB as a support (for example a Texas Instruments CC2430), plus the additional components necessary for its operation: two crystals for watches, decoupling capacitors, polarization resistors, adaptation for the RF port , power, and antenna.

Sufficiently describing the nature of the present invention, as well as how to put it into practice, it is not considered necessary to extend its explanation so that any person skilled in the art understands its scope and the advantages derived therefrom, stating that, within its essentiality, it may be implemented in other embodiments that differed in detail from that indicated by way of example, and to which it will also achieve the protection that is sought provided that it is not altered, changed or modified its fundamental principle .

Claims (5)

one.

Electronic equipment for the identification, control and safety of groups of individuals in mobility, of the radiofrequency-based type, characterized by the fact that it comprises a plurality of small identification bracelets (1) (one for each group member) provided with an RFID tag for the periodic sending of identification signals, at least one SD-type memory card, to allow a mobile device to receive the radio frequency signals sent by the identification wristbands, and at least one mobile device (2) with slot suitable for incorporating said SD type memory card and allowing, through its use, the reception of radio frequency identification signals sent by the wristbands as well as the processing of the data contained in said card.

2.

Electronic equipment for the identification, control and security of groups of individuals in mobility, according to claim 1, characterized in that the mobile device (2) is a PDA, a UMPC (Ultra Mobile PC) or any other portable device with SD card slot, capable of receiving the identification signals of one or more identification bracelets continuously without the need for user interaction, to discriminate the power of the received identification signals, to discern whether it is meters or centimeters per power threshold of

the received signals, to discern in a timely manner that identification signals are in their coverage radius and to make listings, to notify if one or more bracelets have not been received in a certain time, to implement the search for one or several bracelets, as well how to identify a bracelet and show the data (personal, medical, environment, etc.) corresponding to the individual who wears it.

3.

Electronic equipment for the identification, control and security of groups of individuals in mobility, according to claims 1 and 2, characterized in that a PC computer (3) is also contemplated, with which the mobile device (2) is synchronized , which incorporates a computer application and a repository for the management of the data of individuals and identification bracelets (1) and their relationships.

Four.

Electronic equipment for the identification, control and security of groups of individuals in mobility, according to claims 1 to 3, characterized by the fact of additionally incorporating one or more fixed beacons in the area to be monitored, to increase coverage and to locate in certain defined areas where each bracelet is located at all times, being formed by a PCB as a support (for example a CC2430 from Texas Instruments), plus the additional components necessary for its operation: two crystals for watches, decoupling capacitors, resistors polarization, adaptation for the RF port, power, and antenna.

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200901447 SPAIN Date of submission of the application: 06.19.2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: G07C9 / 00 (01.01.2006) RELEVANT DOCUMENTS

Category

Documents cited Claims Affected

X

US 2009 057399 A1 (SAJKOWSKY JAMES M) 05.03.2009, paragraphs 24-41,48-57; Figures 1-6. one

Y

2-4

Y

EP 1855258 A1 (ALCATEL LUCENT) 14.11.2007, paragraphs 7-11,14-17; figure. 2-4

TO

one

X

CHAN, S .; CONNELL, A .; MADRID, E .; PARK, D .; KAMOUA, R .; RFID for personal asset tracking; Systems, Applications and Technology Conference, 2009. LISAT '09, 01.05.2009, ISBN 978-1-4244-2347-7; ISBN 1-4244-2347-3, pages 1-7. one

TO

2-4

TO

US 2005068170 A1 (AUPPERLE BRYAN ERIC et al.) 31.03.2005, paragraphs 19-29,33-35, figures 1,2,4. 1-4

TO

AL-ALI, A. R .; ALOUL, F. A .; AJI N. R .; AL-ZAROUNI, A. A .; FAKHRO N. H .; Mobile RFID Tracking System; Information and Communication Technologies: From Theory to Applications, 2008. ICTTA 2008. 3rd International Conference on, 07.04.2008, ISBN 978-1-4244-1751-3; ISBN 1-4244-1751-1, pages 1-4. 1-4

TO

US 2003016122 A1 (PETRICK KATHRYN D) 23.01.2003, paragraphs 15-25.27; Figures 1A-2,4. 1-4

TO

US 2007013528 A1 (KANTROWITZ ALLEN B et al.) 18.01.2007, paragraphs 16-24,28-33,47,50,51.56; Figure 1. 1-4

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 02.28.2011

Examiner M. Lloris Meseguer Page 1/5

REPORT OF THE STATE OF THE TECHNIQUE Minimum documentation sought (classification system followed by classification symbols) G07C Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC, WPI, INSPEC  WRITTEN OPINION Date of Completion of Written Opinion: 02.28.2011 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1-4 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-4 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published.  WRITTEN OPINION 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

US 2009 057399 A1 (SAJKOWSKY JAMES M) 05.03.2009

D02

EP 1855258 A1 (ALCATEL LUCENT) 11/14/2007

D03

CHAN, S .; CONNELL, A .; MADRID, E .; PARK, D .; KAMOUA, R .; RFID for personal asset tracking; Systems, Applications and Technology Conference, 2009. LISAT '09, 05/01/2009, ISBN 978-1-4244-2347-7; ISBN 1-4244-2347-3, pages 1-7.

D04

US 2005068170 A1 (AUPPERLE BRYAN ERIC et al.) 03.31.2005

D05

AL-ALI, A. R .; ALOUL, F. A .; AJI N. R .; AL-ZAROUNI, A. A .; FAKHRO N. H .; Mobile RFID Tracking System; Information and Communication Technologies: From Theory to Applications, 2008. ICTTA 2008. 3rd International Conference on, 04/07/2008, ISBN 978-1-4244-1751-3; ISBN 1-4244-1751-1, pages 1-4.

D06

US 2003016122 A1 (PETRICK KATHRYN D) 01/23/2003

D07

US 2007013528 A1 (KANTROWITZ ALLEN B et al.) 18.01.2007

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement Of all the documents recovered from the state of the art, document D01 is considered to be the closest to the request being analyzed. The claims of the application are then compared with document D01. Claim 1 Document D01 describes an electronic equipment for the identification, control and security of groups of individuals in mobility, of the radiofrequency-based type, comprising a plurality of identification bracelets (20) provided with an RFID tag for sending signals. identification, at least one SD type memory card (see paragraph 40), and at least one mobile device (18) with slot suitable for incorporating said SD type memory card, this mobile device (18) receiving the radio frequency signals of identification sent by the bracelets (20). Document D01 does not specify that the identification wristbands periodically send the identification signals, since they send the identification signals before a request for sending the mobile device (see paragraph 33). However, the use of identification bracelets that periodically send the identification signals is one of the possibilities that a person skilled in the art would select, without the exercise of inventive activity, to send the identification signal of each bracelet to the reader. Documents D06 and D07 of the prior art illustrate this possibility of sending the bracelets. In these documents, bracelets provided with an RFID tag for sending identification signals periodically send identification signals to a reader. Therefore, it can be concluded that claim 1 does not meet the inventive activity requirement according to article 8.1 LP. Claim 2 Document D01 indicates that the mobile device (18) is a portable device with SD card slot, which receives the identification signals of one or more identification bracelets (20) continuously without the need for user interaction (see paragraphs 51 and 53), being able to discriminate the strength of the received identification signals (see paragraph 52), distinguish in a timely manner that identification signals are in their coverage radius (see paragraph 26), implement the search for a or several bracelets (see paragraphs 53 and 55), as well as identify a bracelet and show the corresponding data (personal, medical, etc.) to the individual who wears it (see paragraphs 27 and 35). Document D01 also indicates that the mobile device (18) communicates with a computer (12), to which it sends the signals received from the identification wristbands. This computer (12) can discern how far the bracelets of a certain mobile device are per power threshold of the signals received on the mobile device (see paragraph 52), can also make listings (see paragraph 54) and warn of whether a or several bracelets have not been received in a certain time (see paragraphs 54 and 57).  WRITTEN OPINION The invention defined in claim 2 differs from document D01 in that it is the mobile device, and not a computer, which can also discern how far the wristbands are per threshold of power of the received signals, make listings and warn of whether a or several bracelets have not been received in a certain time. In this way the operation of the mobile device described in claim 2 is independent of whether or not there is a connection with a computer. The objective technical problem that solves the use of a mobile device as described in claim 2 is to have an autonomous reader, independent of the connection to another device, such as a computer. Document D02 describes a mobile device (see figure 1) used for the surveillance of personal objects. Personal objects to be monitored have an RFID tag incorporated to send identification signals to the mobile device. Initially, the identification values corresponding to the personal objects to be monitored are registered on the mobile device (see paragraph 8). Once the list of personal objects to be monitored is created, the mobile device measures the strength of the signals received from the RFID tags incorporated in the personal objects, the strength of the received signal being directly proportional to the distance between the mobile device and the personal object (see paragraph 15). In the event that the strength of any of the received signals is below a certain threshold, the mobile device activates an alarm indicating the distance of the personal object. Therefore, the objective technical problem mentioned above is solved in document D02. Accordingly, claim 2 lacks inventive activity according to article 8.1 LP. Claim 3 Document D01 indicates that a computer (12), with which the mobile device (18) is synchronized, incorporates a computer application and a repository for the management of the data of the individuals and of the identification wristbands and their relationships (see paragraphs 26, 31 and 54). Therefore claim 3 is considered to lack inventive activity according to article 8.1 LP. Claim 4 Document D01 indicates that additionally one or several fixed beacons can be incorporated in the area to be monitored to increase coverage and be able to locate in certain defined areas where each bracelet is located at any time, these fixed beacons being formed by the necessary components for its operation (see paragraph 26). Therefore, it can be concluded that, in view of the prior art, claim 4 does not meet the inventive activity requirement according to article 8.1 LP.