G - Physics – 08 – G
Patent
G - Physics
08
G
G08G 1/01 (2006.01) H01B 7/16 (2006.01)
Patent
CA 2042086
PHF 90-531 12.04.1991 ABSTRACT: Device for detecting data relating to the passage of vehicles on a road. The invention relates to a device for detecting data relating to the passage of vehicles on a road (20), said device comprising a piezoelectric effect cable (2) and means of rigidifying said cable rigid and transmitting loads produced by the passing vehicles to said cable. The means comprise a cylindrical metal tube (6) having an inside diameter which is larger than the outside diameter of the piezoelectric cable (2) which is arranged along the axis of the tube, the space between the cable and the inner walls of the tube being filled with a compacted metal oxide powder (5). Said device may be installed in a groove (10) which is formed in the road (20), said device having a depth which is substantially equal to the outside diameter of the tube (6), and a transverse dimension which is slightly larger than said diameter. The device is fixed in the groove (10) by mechanical means, in such a manner that the upper surface of the device is flush with the upper surface (1) of the road, for example wedge members (7a, 7b) which are fixed to the road by screws (8) being used to fix the device. Application: Detection of passing vehicles, counting their numbers, measuring their speed and weight, and classification of moving vehicles. Reference: Figure 2.
Bailleul Gilles
Gregoire Pierre
Bailleul Gilles
Fetherstonhaugh & Co.
Gregoire Pierre
Philips' (n.v.) Gloeilampenfabrieken
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