New digital capacitive measurement system for blade clearances
Abstract
This paper presents a totally new concept for tip blade clearance evaluation in turbine engines. This system is able to detect exact 'measurands' even under high temperature and severe conditions like ionization. The system is based on a heavy duty probe head, a miniaturized thick-film hybrid electronic circuit and a signal processing unit for real time computing. The high frequency individual measurement values are digitally filtered and linearized in real time. The electronic is built in hybrid technology and therefore can be kept extremely small and robust, so that the system can be used on actual flights.
- Publication:
-
39th International Instrumentation Symposium
- Pub Date:
- 1993
- Bibcode:
- 1993inin.symp..419M
- Keywords:
-
- Blade Tips;
- Capacitance;
- Clearances;
- Digital Techniques;
- Electrical Measurement;
- Turbine Engines;
- Data Acquisition;
- Real Time Operation;
- Thick Films;
- Instrumentation and Photography