Technical Article · Industrial Facilities
The Evolution of Factory Floor Evaluation Standards in the AGV Era
The traditional floor evaluation system centered on flatness can no longer cover all critical requirements in the AGV era. Joint impact, edge spalling, local settlement, and fatigue durability are key indicators for stable AGV operation but are not adequately reflected in conventional flatness standards. This article proposes four dimensions for AGV-friendly floor evaluation and explains how post-tensioned integrated floor systems, UHPC wear-resistant floors, and Tairun armored joints address each dimension. It is suitable for factory managers planning to introduce AGV systems.
Background and Technical Assessment
The Evolution of Factory Floor Evaluation Standards in the AGV Era
A widely referenced but increasingly insufficient standard: flatness.
In traditional factories, the core indicator for floors is flatness: the smaller the surface undulation, the smoother the forklift travel, and the lower the product damage rate. This logic has held for decades. However, as AGVs (Automated Guided Vehicles) become standard in modern factories and warehouses, this flatness-centric evaluation system reveals significant limitations.
AGV Requirements for Floors Go Beyond Flatness
AGVs rely on sensors for navigation, operating along preset paths with millimeter-level precision. The floor is the physical foundation for AGV movement, and any floor defect can affect system stability through the following mechanisms:
Joint Impact. When forklifts cross floor joints, speeds are typically low, and impact is acceptable. But AGVs travel frequently, sometimes at higher speeds, and the periodic impact from joints accelerates mechanical wear and may trigger sensor misjudgments, leading to system alarms and downtime. More joints mean higher downtime probability.
Debris from Joint Edges. Traditional saw-cut joints can develop edge spalling over time, producing small concrete debris. For manual forklifts, debris is a hygiene issue; for AGVs, it can directly affect drive wheel stability and interfere with ground sensor recognition. In cleanliness-sensitive environments (food, pharmaceuticals, electronics), debris also poses product contamination risks.
Local Settlement and Height Differences. Flatness refers to continuous surface variation, while local settlement creates step-like height differences—a different problem. Abrupt height changes between adjacent areas significantly impact AGV traversability; beyond a certain threshold, AGVs will stop and alarm.
Load-Bearing Stability. AGVs sometimes carry loads of several tons, traveling repeatedly on fixed paths, imposing high-intensity cyclic fatigue loads on the floor. The durability of the floor under fatigue loading is not captured by ordinary flatness indicators.
Four Dimensions of the New Standard
Evaluating AGV-friendly floors requires a comprehensive assessment across four dimensions:
Joint-Free or Minimal Joints. The number of joints on AGV travel paths is a core indicator. Post-tensioned integrated floor technology can reduce joints to a minimum within a 150-meter range, directly correlating with AGV operational safety.
Joint Edge Integrity. For joints that must be retained, the strength and protection of joint edge materials are critical. Tairun armored joints use metal profiles to protect joint edges, preventing spalling and debris even under frequent AGV traffic.
Long-Term Wear Resistance. AGV travel paths are relatively fixed, subjecting the floor to high-frequency concentrated wear. UHPC materials offer significantly higher wear resistance than conventional concrete, maintaining surface quality and extending service life under high-intensity use on fixed paths.
Flatness Retention. Not the flatness at delivery, but the ability to retain flatness under long-term AGV operation and repeated loading. This requires a stable floor base, reliable bonding between surface and base layers, and no local settlement or surface delamination that would compromise the accepted flatness.
Recommendations for Factory Managers
If your factory is planning to introduce AGV systems or is experiencing stability issues with existing AGV systems, consider inspecting the floor as a priority:
- Check the number of joints and joint edge condition on AGV travel paths.
- Inspect for local settlement or abrupt height differences.
- Assess the current wear condition and expected remaining life of the floor surface.
If floor issues exist, the repair window should be before AGV system stable operation, not after frequent AGV failures—the production loss from the latter may significantly exceed the cost of floor repair.
In the AGV era, the floor is the physical foundation of the entire automated logistics system. The standards for this foundation must evolve in step with system upgrades.