Piezoelectric vibration cylinder icing sensor and method for measuring icing condition thereof

Abstract

The invention belongs to the technical field of airplane icing detection, and specifically relates to a piezoelectric vibration cylinder icing sensor and a method for measuring icing condition thereof. Problems that most of the conventional icing sensors only provide icing threshold signals, the thickness of an ice layer cannot be effectively monitored in real time, the sensitivity is low, the size and the mass are large, and the requirements of miniaturization and intelligence of the sensors are hard to be met are solved. The piezoelectric vibration cylinder icing sensor comprises a vibration cylinder, the vibration cylinder is regarded as a resonance sensitive element, an inner wall of the vibration cylinder is pasted with two piezoelectric ceramics respectively serving as a piezoelectric actuating element and a piezoelectric pickup element, an insulation thermal conduction film is grown on an inner wall of the vibration cylinder, an electrothermal film is grown on the insulation thermal conduction film, and two ends of the electrothermal film are equipped with silver electrodes. The equivalent mass of the vibration cylinder is changed by icing so that the natural frequency is changed; and the measurement of the thickness of the ice layer is realized via the detection of the natural frequency of the vibration cylinder. According to the sensor and the method thereof, the precision is high, the reliability is good, the size is small, the power consumption is low, the structure is simple, the production is easy, and the measurement is free of the influence of the external magnetic field.

Description

technical field [0001] The invention belongs to the technical field of aircraft icing detection, and in particular relates to a piezoelectric vibrating cylinder icing sensor and a method for measuring icing conditions thereof, which are installed in areas where aircraft are prone to icing to measure the icing conditions of the aircraft in real time. Background technique [0002] Aircraft icing detection is an important part of the aircraft icing protection system, the necessary key equipment for new passenger aircraft, and the embodiment of the advanced nature, economy and safety of the aircraft. [0003] The icing of the aircraft will not only increase the weight of the aircraft, but also damage its aerodynamic shape, resulting in increased flight resistance and reduced stability performance. When the icing is severe, serious flight accidents may also occur. Therefore, it is necessary to install icing sensors in areas where aircraft is prone to icing to measure the icing si...

AI Technical Summary

Problems solved by technology

[0008] The present invention solves the problems that most of the existing icing sensors only provide icing threshold signals, cannot effectively monitor the thickness of the ice layer in real time, have low sensitivity, large volume and mass, and are difficult to meet the requirements of miniaturization and intelligentization of sensors , provides a piezoelectric vibrating cylinder icing sensor

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