AUTOMATED SCANNING OF DEFLECTION MEASUREMENTS

DEPOULLEMENT AUTOMATISE DES MESURES DE DEFLEXIONS

Numerous data are required quickly in overall studies of road network conditions, in detailed studies preceeding strengthening of part of the network and in studies of the quality control of the work carried out. One of the apparatus fulfilling the requirements for speed, accuracy and quantity is the lpc deflectograph, 30 of which are operating along the metropolitan french network. Because of the large quantity of data they supply, manual and semi-automatic handling became unsatisfactory. A more sophisticated method of data processing was needed. The solution adopted has the following advantages: at the recording level, use of a robust, reliable, low-cost and easy to use device; at the scanning level, use of a data conversion and prehandling centre which produces a magnetic tape free of errors, that can be immediately stored on A computer. After having been operational for one year, the centre appears to completely fulfill the objectives fixed. It can scan 300 km of measurements per 8-hour day. Its maximum capacity can reach 600 km per day, which represents the equivalent of 50 deflectographs working simultaneously. Its main characteristics are: very high scanning speed; marked reduction in the cost of the km scanned; compatability with other types of measuring apparatus with high output; possibility of detecting from a distance the main operational defects of measuring apparatus. This solution enabled a national deformability card index to be set up, which is now operational. /TRRL/

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Siffert, M
  • Publication Date: 1973-3-4

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00125311
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: Dec 3 1975 12:00AM