ELECTROMAGNETIC COUPLING READER

• US 20170330000A1
• Filed: 05/11/2017
• Published: 11/16/2017
• Est. Priority Date: 05/12/2016
• Status: Active Grant

• Current Assignee: Dura Operating LLC (Dura Automotive Systems)
• Original Assignee: Dura Automotive Systems
• Inventors: Durand, Eric
• Granted Patent: US 10,102,405 B2
• Time in Patent Office: Days
• CPC Class Codes: G06K 7/10128 the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
• CPC Class Codes: G06K 7/10207 parameter settings related to power consumption of the interrogator
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An electromagnetic coupling reader may include:

• • an antenna,
  • a management module, and
  • a supervision unit,
  • the supervision unit comprising a sleep mode configured to limit energy consumption,
  • a first wake-up signal enabling the supervision unit to be extracted from the sleep mode,
  • the management module comprising an energy saving mode consisting of measuring, at regular intervals, an impedance of the antenna in order to detect a presence of a peripheral authorizing an electromagnetic coupling, the wake-up signal being activated by the management module when a peripheral is detected,
  • the electromagnetic coupling reader comprising a second wake-up signal controlled by a clock configured to extract the supervision unit from the sleep mode at regular intervals.

Claims

1. An electromagnetic coupling reader, comprising:

an antenna configured to perform the electromagnetic coupling,

a management module configured to modulate and transmit an input signal on said antenna, and to demodulate and transmit an output signal received by said antenna,

a supervision unit configured to generate said input signal and analyze said output signal in such a way as to organize a wireless communication,

said supervision unit comprising a sleep mode configured to limit energy consumption, a first wake-up signal enabling said supervision unit to exit said sleep mode,

said management module comprising an energy saving mode consisting of measuring, at regular intervals, an impedance of said antenna in order to detect the presence of a peripheral authorizing an electromagnetic coupling, said wake-up signal being activated by said management module when a peripheral is detected, and

a second wake-up signal controlled by a clock configured to extract said supervision unit from said sleep mode at regular intervals.

2. The electromagnetic coupling reader according to claim 1, wherein said regular intervals of said second wake-up signal are greater than said regular intervals of said energy saving mode.

3. The electromagnetic coupling reader according to claim 1, wherein said regular intervals of said second wake-up signal have a period of more than 1 s.

4. The electromagnetic coupling reader according to claim 1, wherein said regular intervals of said second wake-up signal have a period substantially equal to 2 s.

5. The electromagnetic coupling reader according to claim 1, wherein said energy saving mode has a waiting period and a detection period.

6. The electromagnetic coupling reader according to claim 5, wherein said waiting period is between 35 and 45 ms.

7. The electromagnetic coupling reader according to claim 5, wherein said waiting period is substantially equal to 40 ms.

8. The electromagnetic coupling reader according to claim 5, wherein said detection period is between 50 and 150 μ

s.

9. The electromagnetic coupling reader according to claim 5, wherein said detection period is substantially equal to 100 μ

s.

10. The electromagnetic coupling reader according to claim 1, wherein said supervision unit implements the NFC protocol.