Heavy Weight Deflectometer HWD
Product Description
A four-part split loading plate is placed on the surface of pavement and a load pulse is applied to the plate. The load pulse is generated by the impact of a falling weight. The load pulse is designed to cause a deflection that closely simulates the deflection of actual aircraft wheel loading up to 250KN.
Utilising 9 pcs deflection sensors to measure deflection basin and collect the information to determine surface material strength. By combining this data with Layer thickness, resilient E-moduli can be determined, and further analysis can determine bearing capacity, structural strength, overlay design and expected surface life, then achieve proper maintenance.
Features
A four-part split loading plate is placed on the surface of pavement and a load pulse is applied to the plate. The load pulse is generated by the impact of a falling weight. The load pulse is designed to cause a deflection that closely simulates the deflection of actual aircraft wheel loading up to 250KN.
Utilising 9 pcs deflection sensors to measure deflection basin and collect the information to determine surface material strength. By combining this data with Layer thickness, resilient E-moduli can be determined, and further analysis can determine bearing capacity, structural strength, overlay design and expected surface life, then achieve proper maintenance.
Main Specification
| Loading force | 12~250KN ( 150KN optional to be normal FWD) |
| Moving speed | 0~120km/hour |
| Testing speed per point | Around 35s |
| Deflection type | Magnet electric speed sensor |
| Deflection sensor quantity | 1~9pcs selectable (can be extended up to 15pcs) |
| Deflection range | ±2500um |
| Deflection accuracy: | 2% |
| Deflection repeatability | 1% |
| Loading repeatability: | 2% |
| Loading resolution | 0.1KN , 1Kpa |
| Loading plate: | D300mm / 4-segment plate (D450mm can be customized) |
| Temp. Measuring range | -50℃ ~ 100℃ / platinum resistance & infrared |
| Temp. Resolution | 0.1℃ |
| Temp. Accuracy | 0.5% |
| GPS accuracy | +/-5meters |
| Weight | Around 1500KG |