Tower Crane Load Moment Indicator: Intelligent Safety Core And Global Adaptation

1. Operating Principles and Device Types

1. Mechanical Load Moment Indicator

   1) Arc-shaped Plate Structure: Detects structural stress via deformation plates welded to the tower’s main chords. Triggers alarms at 90% rated torque (e.g., 630kN·m) and cuts power when exceeding 110% 

   2) Tension Ring Structure: Uses 316L stainless steel ring sensors to measure wire rope tension, ideal for high-humidity coastal projects in Southeast Asia 

2. Electronic Load Moment Indicator

   1) Dual-Parameter Monitoring: Integrates Q345 high-precision force sensors and inclinometers to calculate torque (M=R×W) with ≤±2% error 

   2) IoT Integration: Embeds 4G/5G modules for real-time data transmission, compliant with CE certification’s emergency response requirements 

2. Technological Innovations

1. Multi-Stage Safety Thresholds

   1) Stage 1: Audible/visual alarms activate at 90% rated torque, forcing hoisting speed ≤0.67m/s 

   2) Stage 2: Cuts power at 110% overload while permitting lowering operations to prevent structural shocks 

2. Environment-Adaptive Algorithms

   1) Desert: Temperature compensation eliminates monitoring errors at 122°F (50°C) 

   2) Polar Regions: -40°F (-40°C) resistant components prevent sensor failure