signal transmission of high-temperature thin-film sensor

   Signal transmission refers to the way in which the high-temperaturepiezos discs transducer of thin-film sensor is fabricated on the component or structure, and the method of supplying power and taking power is to measure signals such as strain and temperature. High-temperature areas of PZT piezoceramic element are often accompanied by harsh environments such as high pressure, oxidation, and corrosion. For example, aero-engine turbine blades are exposed to temperatures above 1 700 °C, and they are subjected to large pressures and centrifugal forces caused by high rotational speeds, piezoelectric material piezos transducer makes it difficult to signal. The thin-film thermocouple is developed by NASA connects. Platinum wire of the turbine blade pad with a high-temperature piezo ceramic adhesive to measure the temperature of the turbine blade surface. The signal is led by a platinum wire wire welded to the root of the turbine blade. Although the method does not affect the surface airflow and heat distribution, the joint is unstable under the high-temperature and high-speed rotation. The test results show that most of the failure comes from the junction of the film and the wire.