The accuracy of vehicle speed measured by a speedometer is analysed. The stress on the application of skew normal distribution is laid. The accuracy of measured vehicle speed depends on many error sources: construction of speedometer, measurement method, model inadequacy to real physical process, transferring information signal, external conditions, production process technology etc. The errors of speedometer are analysed in a complex relation to errors of the speed control gauges, whose functionality is based on the Doppler effect. Parameters of the normal distribution and skew normal distribution were applied in the errors analysis. It is shown that the application of maximum permissible errors to control the measuring results of vehicle speed gives paradoxical results when, in the case of skew normal distribution, the standard deviations of higher vehicle speeds are smaller than the standard deviations of lower speeds. In the case of normal distribution a higher speed has a greater standard deviation. For the speed measurements by Doppler speed gauges it is suggested to calculate the vehicle weighted average speed instead of the arithmetic average speed, what will correspond to most real dynamic changes of the vehicle speed parameters.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    On statistical estimations of vehicle speed measurements



    Erscheinungsdatum :

    01.01.2019


    Anmerkungen:

    Metrology and measurement systems, Warsaw : Polish Academy of Sciences, 2019, vol. 26, iss. 3, p. 551-559 ; ISSN 0860-8229 ; eISSN 2300-1941


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



    Developing Video Image Processing Technique for Vehicle Speed Estimations

    Jangra, Vivek / Yadav, Ramnaresh / Chowdhary, Sunil Kumar et al. | IEEE | 2023



    Train Speed Estimations from Ground Vibration Measurements Using a Simple Rail Deflection Model Mask

    Jurdic, V. / Bewes, O. / Burgemeister, K. et al. | British Library Conference Proceedings | 2018


    Train Speed Estimations from Ground Vibration Measurements Using a Simple Rail Deflection Model Mask

    Jurdic, V. / Bewes, O. / Burgemeister, K. et al. | Springer Verlag | 2018


    Driving Surface Friction Estimations Using Vehicle Steering

    POEPPEL SCOTT C / JONASSON MATS | Europäisches Patentamt | 2020

    Freier Zugriff