1. Structural Reliability: Examine material strength, connection process, and load performance. The structure is the foundation for all functions and requires comprehensive evaluation based on materials, design, and measured data.
Mast Material and Treatment: Prioritize 6061-T6 or 6063-T6 aluminum alloy (tensile strength ≥310MPa) or 316 stainless steel. Carbon fiber is suitable for lightweight and insulation applications. The surface should undergo hard anodizing (thickness ≥25μm) to improve wear resistance and fatigue resistance.
Sectional Structure Design: Multi-section sleeve structures must ensure a section gap ≤0.5mm, uniform cross-sectional stiffness, and prevent swaying after extension. High-end models use ball screw drives with a positioning accuracy of ±1mm and strong resistance to lateral forces.
Load and Stability Verification: The nominal load must include wind load effects. At a height of 14 meters, the bending moment increases dramatically under level 8 winds (20 m/s), and the safety margin should be ≥50%. Finite element simulation reports or wind tunnel test data can be requested from the supplier.
2. Environmental Adaptability: Verify protection level, weather resistance, and performance under extreme conditions. The equipment must operate stably in complex environments such as wind, rain, dust, high and low temperatures, and salt spray.
Protection Level: The overall protection should be no less than IP65 (dustproof and waterproof). For vehicle-mounted or military-grade applications, IP67/IP68 is recommended to ensure normal operation in heavy rain and dust storms.
Temperature Resistance and Corrosion Resistance: The operating temperature range should cover -40℃ to +80℃. Motors and seals must be resistant to low-temperature brittleness.
In coastal or high-salt-spray environments, fasteners should be made of 316 stainless steel or have an anti-corrosion coating to prevent electrochemical corrosion.
Pass a salt spray test of ≥1000 hours (GB/T 10125 standard), with no blistering or peeling of the coating.
Wind Resistance and Dynamic Stability: High-quality products must pass wind pressure resistance testing and dynamic wind vibration response testing to assess top displacement, natural frequency, and damping changes under gusts and pulsating winds, avoiding resonance risks.
3. Safety Mechanisms: Check Multiple Protections, Emergency Functions, and Compliance Certifications: Safety is the bottom line. High-quality products must have multiple redundant designs and verifiable safety guarantees.
Lifting Safety System
Power-off Self-locking: Electromagnetic braking + mechanical locking double insurance to prevent falls during power outages.
Overload/Overheat Protection: Built-in torque detection in the motor; automatic shutdown and alarm in case of overload.
Dual Limit Control: Mechanical + electronic limit to prevent overshooting or disengagement.
Lightning Protection and Grounding: Equipped with a dedicated grounding terminal; grounding resistance ≤4Ω (GB50057 standard), and provides independent testing documentation.
Operational Redundancy Design: High-safety scenarios should have "electric + manual" dual-mode drive; manual lifting is possible after a power outage to ensure task continuity.
Compliance and Testing Certification: Verify CE, FCC, RoHS, and other certifications, and request third-party testing reports, focusing on material composition analysis, mechanical property testing (tensile, bending), and anti-corrosion coating adhesion.