Piezoelectric sensor module of a WIM system for two-track vehicles and measurement method
US9488517B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Oct 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/052
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor module for measuring axle speeds and weights of double-track vehicles which travel in a direction of travel (L) along a carriageway with two lanes includes a plurality of piezoelectric strip sensors (A, B, C, D) that are arranged in a first lane group (I) and a second lane group (II). All the strip sensors (A, B, C, D) are spaced from each other in the direction of travel (L) via a secure longitudinal offset (LAD), which is greater than the maximum wheel contact length, and are offset from one another by between one centimeter and fifteen centimeters in the transversal direction. The sensor module also has a module length (LABCD) of less than 80 centimeters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.