The Vehicle Production Line

Reading TPM ID's via Dual frequency Reader

Bartec Auto ID Limited have successfully installed production line TPMS reading systems at Renault, Daimler-Chrysler and Nissan. To now read High Volume Production line TPMS reading systems have been successfully installed at Renault, Daimler-Chrysler and Nissan.

Renault, SandouvilleDaimler-Chrysler, Windsor

System description

The dual frequency production line reader is built to the highest specification to operate with the maximum efficiency. It is always possible for electro-magnetic interference (EMI) or radio frequency interference (RFI) to be present whilst the readers are trying to read the TPMs. To ensure the maximum performance Bartec Auto ID Limited have designed the FXR to activate at 125KHz and to readback at both 125KHz and UHF.

This gives multiple opportunities to read and check the result achieved.

Antenna sends 125kHz signal to activate the TPMS.

TPM sends 125KHz and after 5 seconds sends 433 MHz or 315MHz.

Reader characteristics

The reader has been designed to activate any size and construction of tire and rim at approximately 30cm. Other customer design requirement have included:

  • Activation of TPMs at 125KHz and readback at 125KHz, 433MHz and 315MHz.
  • Non-read rate better than 1 in 1000
  • Decode time less than 3.5 seconds
  • Line space available for Antenna installation to be a maximum of 1 metre.
  • Interfaces to infra-red or ultrasonic car and tire detector sensors.
  • Antenna mounting arrangement to enable ease of installation, adjustment and collision protection.

Auto Reader Antenna mounted on swivel bases with limit switch detection

Reader control unit

The reader unit comprises the following key components:

  • Antenna
  • Reader unit
  • Transceiver
  • Ultrasonic Wheel detector

Diagram

Specification of Reader Control Unit

  • Stand-alone or slave to PC operation
  • Automatic self-test
  • Comprehensive diagnostics
  • Boot-up and watchdog recovery time less than 2 seconds
  • MTBF greater than 10,000 hours
  • MTTR 5 minutes ( unit swap-out )
  • RS232 or RS485 communications. Other interfaces to order
  • Simple talk/listen protocol

System Integration

Bartec Auto ID Limited have worked with their sister company Bartec Systems Limited to undertake full systems integration of the production line system for Nissan UK. In the North American market Dominion Technologies have partnered with Bartec Auto ID to undertake this work and subsequently support it.

Systems have been developed to integrate with the plant mainframe computer or to act in stand-alone mode whereby a TPM Control dual PC with Microsoft SQL server database has acted as the production line host taking in the vehicle data from the plant host computer along with the TPM IDs and their location on the vehicle and outputting them to the ECU write equipment.