Method for measurement of at least one crossing time at a line of passage of at least one moving object by means of a personalised transponder module placed on the moving object, during a sports competition in a measuring system, which includes at least one transponder module, at least one unit for transmitting a low frequency electromagnetic field signal via an antenna disposed on the line of passage and a decoder unit for receiving at least one high frequency measurement signal from each transponder module in proximity to the line of passage, the method including the steps consisting in: - generating a low frequency electromagnetic field signal by the transmission unit, the low frequency electromagnetic field signal comprising a modulation of a synchronisation and activation command at the start of each repetition period (te) of the modulation of the synchronisation and activation command, - activating each personalised transponder module on the first reception of the modulated synchronisation command in the low frequency electromagnetic field signal by the personalised transponder module, - measuring the intensity of the low frequency electromagnetic field signal captured by the transponder module once activated and synchronised, at regular time intervals by the transponder module, by performing at least a first intensity measurement or a first group of intensity measurements in each repetition period (te) of the modulation of the low frequency electromagnetic field signal beginning after the end of the modulation of the synchronisation and activation command, when the low frequency electromagnetic field signal is without modulation and generated with constant frequency and amplitude by the transmission unit, - transmitting directly via the transponder module at least each first intensity measurement or at least each first group of intensity measurements to the decoder unit before the crossing of the line, - predicting the actual crossing time of each transponder module of the line of passage by the decoder unit before the crossing of the line of passage via the transponder module on the basis of the variation in the electromagnetic field intensity of the measurements received from the transponder module. - generating a low frequency electromagnetic field signal by the transmission unit, the low frequency electromagnetic field signal comprising a modulation of a synchronisation and activation command at the start of each repetition period (te) of the modulation of the synchronisation and activation command, - activating each personalised transponder module on the first reception of the modulated synchronisation command in the low frequency electromagnetic field signal by the personalised transponder module, - measuring the intensity of the low frequency electromagnetic field signal captured by the transponder module once activated and synchronised, at regular time intervals by the transponder module, by performing at least a first intensity measurement or a first group of intensity measurements in each repetition period (te) of the modulation of the low frequency electromagnetic field signal beginning after the end of the modulation of the synchronisation and activation command, when the low frequency electromagnetic field signal is without modulation and generated with constant frequency and amplitude by the transmission unit, - transmitting directly via the transponder module at least each first intensity measurement or at least each first group of intensity measurements to the decoder unit before the crossing of the line, - predicting the actual crossing time of each transponder module of the line of passage by the decoder unit before the crossing of the line of passage via the transponder module on the basis of the variation in the electromagnetic field intensity of the measurements received from the transponder module.