Method for determination of the stress on blades of a turbine machine during operation and corresponsing device for carrying out said method

A method for determining stress of at least one turbine component of a plurality of turbine components of a turbine machine, executed by a device for determining the stress, the turbine component chosen from the group consisting of a turbine blade and a guide vane,

• the plurality of turbine components arranged in component rows,
• the device comprising:
• at least one electromagnetic wave emitter for emitting at least one electromagnetic emission wave;
• at least one electromagnetic wave receiver for receiving at least one electromagnetic receive wave;
• and
• at least one analyzer for analyzing the electromagnetic receive wave,
• the turbine component comprising a reflection surface for converting the electromagnetic emission wave into the electromagnetic receive wave by at least partially reflecting the electromagnetic emission wave, and
• the electromagnetic wave emitter and the electromagnetic wave receiver arranged at at least one location between the component rows and operatively connected to the reflection surface of the turbine component,
• the method comprising:
• emitting the electromagnetic emission wave by the electromagnetic wave emitter;
• converting the electromagnetic emission wave into the electromagnetic receive wave by the reflection surface of the component;
• receiving the electromagnetic receive wave by the electromagnetic wave receiver;
• and
• determining the stress of the component by analyzing the received electromagnetic receive wave by the analyzer.

A turbine machine, comprising a device for determining stress of at least one turbine component of a plurality of turbine components of the turbine machine,

• the turbine component chosen from the group consisting of a turbine blade and a guide vane,
• the plurality of turbine components arranged in component rows,
• the device comprising:
• at least one electromagnetic wave emitter for emitting at least one electromagnetic emission wave;
• at least one electromagnetic wave receiver for receiving at least one electromagnetic receive wave;
• and
• at least one analyzer for analyzing the electromagnetic receive wave,
• the turbine component comprising a reflection surface for converting the electromagnetic emission wave into the electromagnetic receive wave by at least partially reflecting the electromagnetic emission wave, and
• the electromagnetic wave emitter and the electromagnetic wave receiver arranged at at least one location between the component rows and operatively connected to the reflection surface of the turbine component.

Device for determining stress of at least one turbine component of a plurality of turbine components of a turbine machine,

• the turbine component chosen from the group consisting of a turbine blade and a guide vane,
• the plurality of turbine components arranged in component rows,
• the device comprising:
• at least one electromagnetic wave emitter for emitting at least one electromagnetic emission wave;
• at least one electromagnetic wave receiver for receiving at least one electromagnetic receive wave;
• and
• at least one analyzer for analyzing the electromagnetic receive wave,
• the turbine component comprising a reflection surface for converting the electromagnetic emission wave into the electromagnetic receive wave by at least partially reflecting the electromagnetic emission wave, and
• the electromagnetic wave emitter and the electromagnetic wave receiver sized and configured to be arranged at at least one location between the component rows and operatively connectable to the reflection surface of the turbine component.