WIM sensor with sensor package

A WIM sensor for measuring wheel forces of vehicles that pass over the WIM sensor on a road, the WIM sensor comprising:

• a hollow profile that is elongated along a longitudinal axis thereof, the hollow profile defining an interior space;
• disposed within the interior space of the hollow profile are a first inner pressing surface and a second inner pressing surface, said inner pressing surfaces being arranged opposite of each other and connected to one another on both sides by curved, pre-tensioned profile edges;
• disposed within the interior space of the hollow profile are a plurality of piezoelectric measuring elements, each of the plurality of piezoelectric measuring elements defining a the longitudinal axis and having a first force absorbing surface and a second force absorbing surface arranged along the respective longitudinal axis thereof, each said respective first and second force absorbing surface facing the respective first and said second pressing surface, wherein all first force absorbing surfaces of the measuring elements are electrically insulated from the first pressing surface of the hollow profile;
• an electrode connecting all first force absorbing surfaces of the measuring elements, the electrode formed as a long strip of insulating film having an electrically conductive layer on one of its sides, the electrode being disposed between the measuring elements and the first pressing surface and with the electrically conductive layer facing the measuring elements;
• and
• wherein between the first one of the plurality of measuring elements and the second pressing surface is an additional insulating film comprising an electrically conductive layer that faces the first one of the plurality of measuring elements, and wherein the additional insulating film is identical in design to the insulating film.