Page 52 - วิศวกรรมสาร ปีที่ 74 ฉบับที่ 4 ตุลาคม - ธันวาคม 2564
P. 52

Typical causes for problematic Track Sections and
                 Axle Counters as a solution
                 There are several factors that can contribute to a problematic track section in train detection.

                      Climatic influences can cause frequent track circuit downtimes. This is especially true for
                       areas where there is a high risk of flooding. In countries like England, snow and ice on the
                       rails can also affect the working of TC – as can wet tunnels and overall high levels of
                       humidity like they are to be experienced in tropical regions like Thailand with periods of
                       intense rainfall.  Also, in summer  heat  could  affect  the  infrastructure  in the  future,
                       temperature reaching more than 42 degrees Celsius already today in some regions.
                      Rusty rails on track sections that are not driven on regularly can decrease the reliability of
                       TC. Other causes for limited conductivity of rails can be deposits on the track. These range
                       from damp leaves to litter.
                      Electromagnetic interference (EMI) can also cause availability issues on track sections
                       with TC.
                      TC technology uses insulated rail joints to separate individual track sections. This creates
                       mechanically  neuralgic  areas in the track.  If  high levels  of mechanical stress  on  this
                       regions leads to breakouts, the electrical separation is no longer given.






















                 Frauscher  Axle  Counters are  a  convincing  solutions  for  problematic track section like  these
                 because of their  specific properties.  Their integration  will  have a  direct positive  effect  on
                 availability and maintenance.
                      The combination of track-mounted, robust wheel sensors with IP68 ingress protection and
                       Axle Counters  in a  safe housing  is not affected  by  flooding,  snow, ice,  rust or
                       electromagnetic interference in the track.
                      Axle Counters don’t require bonds or insulated joints.


           52
                  วิศวกรรมสาร ปีที่ 74 ฉบับที่ 4 ตุลาคม-ธันวาคม 2564
   47   48   49   50   51   52   53   54   55   56   57