This content is not included in your SAE MOBILUS subscription, or you are not logged in.
RF Repeater Design Considerations for Tire Pressure Monitoring System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 5, 2016 by SAE International in United States
Annotation ability available
Tire Pressure Monitoring System (TPMS) has become a popular system due to regulation in many countries. TPMS consists of sensors that measure air pressure and temperature in the tires. Each sensor transmits tire information to TPMS central unit for display purpose via RF. Commercial trailers having bodies longer than 7 m require RF repeaters to increase the data transmission range. Located near to rear wheels, RF repeater receives sensor signal in the rear wheels and transmits the signal to TPMS central unit.
In this paper, we discuss RF repeater which transmits at multiple frequencies in order to increase signal reception. On TPMS central unit, RF receiver is able to tune to receive frequencies used in sensors and RF repeater. Other method for improving reception is to transmit same payload multiple times at same frequency as that of sensor.
In the paper, other important specifications are discussed as RF repeater design is concerned. A user’s case of RF repeater is implemented. Time required for a complete transmission or reception is measured in the user’s case. As each TPMS sensor transmits periodically (e.g. 30 s) to the RF repeater, short time is required to change between receive and transmit modes for RF repeater. So the switching time between receive and transmit modes is measured in RF repeater. In the receive mode, RF repeater measures the Received Signal Strength Indication (RSSI). This RSSI can be used to indicate if location of RF repeater is optimum for receiving sensors in the rear wheels.
CitationGow, F., Guan, L., Park, J., and Kim, J., "RF Repeater Design Considerations for Tire Pressure Monitoring System," SAE Technical Paper 2016-01-0097, 2016, https://doi.org/10.4271/2016-01-0097.
- International Organisation for Standards 2006 “Road vehicles -Safety enhancement in conjunction with tyre inflation pressure monitoring
- Infineon Technologies XC886 User Manual 1.3
- Infineon Technologies, SmartLEWIS TRX TDA5340 User Manual 1.0
- Infineon Technologies TDA5150 Data Sheet 1.1
- TMC RP 228A, Guidelines for Wireless Tire Pressure Monitoring Systems for Medium and Heavy Duty Truck Tires.
- TMC RP 239, Commercial Vehicle Tire Inflation and/or Monitoring System Guideline.