Miniature wireless alarm device

• US 10,210,744 B2
• Filed: 05/04/2016
• Issued: 02/19/2019
• Est. Priority Date: 05/06/2015
• Status: Expired due to Fees

• Current Assignee: Engineering Security, Co., University of Côte d'Azur
• Original Assignee: Centre National De La Recherche Scientifique, Engineering Security, Co., University of Nice Sophia Antipolis
• Inventors: Diallo, Aliou, Staraj, Robert, Le Thuc, Philippe, Cherif, Imen
• Primary Examiner(s): King, Curtis J
• Application Number:
  US15/572,114
• Publication Number:
  US 20180137741A1
• Time in Patent Office: 1,021 Days
• Field of Search: None
• CPC Class Codes: G06K 19/0704 the battery being rechargeable, e.g. solar batteries
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 25/016 Personal emergency signalling and security systems emergency non-personal manually actuated alarm activators G08B25/12
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/273 Adaptation for carrying or wearing by persons or animals
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

An alarm device comprises an RFID circuit that is configured to store identification information and is coupled to an antenna designed to receive and to emit, from and to an RFID reader, signals at the frequency of the RFID reader, and a switch coupled to the antenna and able to be activated by a user, enabling the antenna to be matched to the frequency of the RFID reader. The alarm device comprises the RFID circuit, the antenna and the switch designed to be incorporated into an object worn by a user, and enable the alarm to be activated discreetly.

Claims

1. A wireless alarm device comprising:

an RFID circuit that is configured to store identification information and that is coupled to at least one antenna designed to receive and to emit, from and to an RFID reader, signals at the frequency of the RFID reader; and

a switch coupled to said at least one antenna and able to be activated by a user, enabling the antenna to be matched to the frequency of the RFID reader, wherein

the RFID circuit, the at least one antenna, and the switch are designed to be incorporated into an object worn by the user;

the object is a ring or a band worn on a finger of the user,

the at least one antenna is a dipole antenna,

two radiating strands of the dipole antenna are wound around the ring or the band, and

the switch is positioned on the inner side of a hand of the user.

2. The device as claimed in claim 1, wherein the RFID circuit is of passive or semi-active RFID type.

3. The device as claimed in claim 1, wherein the identification information is an identifier of said object.

4. The device as claimed in claim 1, wherein the frequency of the RFID reader is a frequency in the UHF band.

5. The device as claimed in claim 1, wherein the at least one antenna is inductively coupled with the RFID circuit.

6. The device as claimed in claim 5, further comprising a second antenna inductively coupled with the at least one antenna.

7. The device as claimed in claim 1, wherein

the switch is positioned on a stub of the dipole antenna.

8. The device as claimed in claim 1, wherein the object is the ring and the switch is positioned on an upper surface of the ring.

9. The device as claimed in claim 1, wherein the object is the ring and the switch is positioned on an inner face of the ring.