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Train Axle Detector Based on Signal Codification with a Barker code
Technical Paper
2001-01-3257
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents the development and implementation of an electronic axle detection system applied to trains passing a predetermined point on a railway. The system permits detection even if the train is travelling at a velocity of up to 350 Km/h, depending on the diameter of the train wheel. The system uses two coils placed on either side of the rail, one used as an emitter and the other as a receiver, which, as a result of the attenuation of the electromagnetic field between the coils, detect the passing of the train wheel. In contrast to other systems with similar characteristics, in this case the signal emitted is specially coded (using a 13-bit Barker code). On reception, a correlation algorithm (implemented in an FPGA) enables the signal emitted to be detected even if there is a low signal-to-noise ratio. By using this technique, the system is also able to reject a great deal of interference coming from electric motors or other electromagnetic sources. Furthermore, a slight variation of the frequency of modulation of the signal emitted allows two systems to be used with no interference between them; useful when the direction of travel has to be determined.
Authors
- Jesús Ureña - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Manuel Mazo - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- J. Jesús García - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Álvaro Hernández - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- José M. Villadangos - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Marta Marrón - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Julio Pastor - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Mª Soledad Escudero - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
- Rubén García - Department of Electronics. University of Alcalá.Escuela Politécnica. Campus Universitario
Citation
Ureña, J., Mazo, M., García, J., Hernández, Á. et al., "Train Axle Detector Based on Signal Codification with a Barker code," SAE Technical Paper 2001-01-3257, 2001, https://doi.org/10.4271/2001-01-3257.Also In
References
- Hamadene H. Colle E. “Optimal estimation of the range for MRs using ultrasonic sensors” SICICA'97 141 146 June 1997
- 1999
- Abril 1999
- Ureña Jesús Mazo Manuel García J. Jesús Hernández Álvaro Bueno Emilio “Correlation Detector Based on a FPGA for Ultrasonic Sensors” Rev. Microprocessor and Microsystems 23 1 1 25 33 Junio 1999