Application of GPR in Asphalt Thickness Detection

🔍 Quick Science: How Dual-Frequency GPR Detects Asphalt Thickness?
(200MHz & 600MHz Combined Use)

📌 Key Advantage: Balances Precision & Depth

• 600MHz (High Frequency): Captures      fine surface details (e.g., 5–20cm asphalt layers), ideal for detecting      cracks or thin repairs.

• 200MHz (Low Frequency): Penetrates      deeper (2–4m), assesses thick asphalt layers or subgrade conditions (e.g.,      settlement).

🛠️ Practical Applications

• Layered inspection for urban      roads/highways (surface + subsurface).

• Detects both surface defects (cracks)      and subsurface risks (voids, moisture).

⚙️ Technical Highlights

• Dual-frequency data fusion: High-res surface + deep-layer      coverage.

• Integrated antenna design: Improves efficiency for large-scale      surveys.