Radiofrequency reading system on board a transport vehicle

A transport vehicle comprising:

• a radiofrequency transponder reading system;
• and
• at least one movable assembly, capable of ensuring movement of the transport vehicle relative to a ground over which the transport vehicle is travelling, comprising a tire set in motion about an axis of rotation,
• free movement of the at least one movable assembly taking place in a predominantly two-dimensional plane in a cylindrical reference frame associated with the at least one movable assembly, an axial direction of which is a direction of the axis of rotation,
• the tire defining a median plane which is perpendicular to the axis of rotation,
• the at least one movable assembly being equipped with a radiofrequency transponder,
• the radiofrequency transponder reading system comprising:
• a generator of electrical signals transmitting at a frequency F0 included in an ultra-high frequency band, coupled to a demodulator of electrical signals adapted to a frequency band around F0, mounted on the transport vehicle;
• at least one bidirectional communication cable, partially flexible, comprising a conductive core covered with a first dielectric element, the first dielectric element covered with a conductive assembly, having one end galvanically connected to the radiofrequency transponder reading system, having at a free end a means for capacitive coupling between the conductive core and the conductive assembly via a second dielectric element, adapted to the frequency band of the radiofrequency transponder reading system,
• the at least one bidirectional communication cable, being rigidly secured to the transport vehicle and external to the at least one movable assembly, comprising a radiating part,
• wherein a distance of a radial projection of a first continuous part of the radiating part of the at least one bidirectional communication cable on a cylinder, with an axis of revolution coaxial with the axis of rotation, circumscribing the tire, is less than or equal to 1 meter,
• wherein a distance of an axial projection, in the direction of the axis of rotation, of the first continuous part of the radiating part of the at least one bidirectional communication cable on the median plane of the tire is less than 2 meters,
• wherein the first continuous part of the radiating part of the at least one bidirectional communication cable comprises at least one meander comprising an outward path and a return path spaced apart from one another by a distance P, each outward path and return path extending over a length L,
• wherein a curvilinear length of the at least one meander is between 0.7 and 1.3 times a wavelength L0 defined by the communication frequency F0, and
• wherein the distance P is less than a third of the wavelength L0.