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Industry Applications

Empowering Industrial Intelligence through Smart Monitoring

Wind turbine generators are high-value assets operating in harsh and complex environments. During operation, turbines are subjected to continuous loads including vibration, torsion, and shear forces, which can cause varying degrees of damage to components and fasteners. Bolts connecting the blade roots are especially prone to issues such as loosening, loss of preload, or even fracture due to the rotational motion over long periods. Additionally, the stability of the tower and foundation is critical—any tilt or settlement could lead to structural failure or equipment damage.

If such faults are not detected early, they may result in severe turbine malfunctions, financial losses, or even personal injury. According to industry data, incidents such as tower collapse and blade detachment caused by bolt failure or tower tilt occur annually, posing significant challenges to wind farm operations.

Wind turbines are often located in remote or offshore environments, making maintenance difficult, costly, and time-consuming—often requiring full shutdowns for inspection and repair. Therefore, early detection of bolt loosening, tower tilt, and foundation settlement is vital for improving turbine safety and operational reliability.

Theta is committed to developing reliable and cost-effective monitoring systems for wind turbine applications. After years of research and testing, we have developed solutions capable of monitoring bolt loosening, breakage, preload trends, tower inclination, and foundation settlement. The system issues early warnings and real-time alerts, enabling operators to respond proactively, reduce on-site inspections, lower maintenance costs, minimize downtime, and extend the lifespan of wind turbine systems—all while reducing the risk of safety incidents.

Bolt Loosening Monitoring

Non-invasive ultrasonic sensors are mounted on bolt ends to measure preload using advanced signal processing and temperature compensation algorithms. These sensors accurately detect bolt conditions such as loosening, fatigue, and fracture.

SA210

SA210

Compact design for standard bolt loosening monitoring applications.

SA210S

SA210S

Compact design for standard bolt loosening monitoring applications.

SA220

SA220

Ultra-thin profile for applications with limited mounting space.

SA220S

SA220S

Ultra-thin profile for applications with limited mounting space.

Bolt Preload Monitoring

Sensors are mounted on the nut and rotate with it to measure the angular displacement relative to the bolt. This non-invasive system uses precision signal processing algorithms to detect loosening by calculating the nut’s rotation angle, enabling accurate preload assessment.

SAS100

SAS100

Compact design for standard bolt preload monitoring applications.

SAS100A

SAS100A

Enhanced signal performance tailored for anchor bolt preload monitoring.

SAS120

SAS120

Ultra-thin probe with split-type design, ideal for bolts with internal hex sockets or confined installation spaces.

DS180

DS180

Multi-channel ultrasonic bolt preload acquisition devices.

Tower Monitoring

Tower Tilt Monitoring

High-precision dynamic tilt sensors are installed at the top of the tower to monitor inclination and swaying. With a resolution of ±0.001°, these sensors detect even the slightest changes, ensuring tower structural stability.

Foundation Settlement Monitoring

Tilt sensors installed at the foundation detect non-uniform settlement with the same ±0.001° accuracy, identifying hidden risks early and preventing foundation-related structural failures.

Integrated Safety Enhancement

Through comprehensive monitoring of bolt loosening, tower tilt, and foundation settlement, Theta’s wind power monitoring solution enhances the operational safety of wind turbines, reduces maintenance costs, extends equipment life, and ensures long-term stable operation of the entire system.

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