WIM SENSOR WITH A SENSOR UNIT Russian patent published in 2021 - IPC G01G19/02 

FIELD: measuring equipment.

SUBSTANCE: claimed invention relates to weight measuring equipment and can be used to measure the load on the wheels of vehicles on the road when moving. The substance of the invention consists in the fact that the WIM sensor has a hollow profile made long along the longitudinal axis, with an internal space, wherein the internal space has a first and a second internal pressure surface, wherein the pressure surfaces are located opposite each other and are interconnected on both sides by curved, pre-tensioned edges of the profile. Multiple piezoelectric measuring elements are therein located in the internal space along the longitudinal axis, wherein each element has first and second load perception surfaces, wherein the load perception surfaces are facing the first or the second pressure surfaces, respectively. All the first load perception surfaces of the measuring elements are therein electrically interconnected by an electrode and electrically isolated from the first pressure surface. To reduce the costs and facilitate the assembly of the WIM sensor, it is proposed that the electrode is made in the form of a long, strip-like insulating film with an electrically conductive layer applied on one side thereof, wherein the electrode is located in the internal space between the measuring elements and the first pressure surface. The electrically conductive layer is therein directed to the measuring elements, wherein the insulating film opposite the electrically conductive layer is provided with a matching electrically conductive layer. Also proposed is a method for mounting a WIM sensor.

EFFECT: technical result consists in providing a possibility of improving the accuracy of measuring the load on the wheels of vehicles on the road when moving.

15 cl, 7 dwg