Icing sensor based on surface acoustic wave oscillator

Abstract

The invention relates to an icing sensor based on a surface acoustic wave oscillator. The icing sensor comprises a surface acoustic wave device and an oscillation circuit (11), and further comprises apackaging tube shell (6) and a water permeable film (7), wherein the exterior of the surface acoustic wave device is packaged by the packaging tube shell (6), the water permeable film (7) is arrangedat an opening of the packaging tube shell (6), a surface of the surface acoustic wave oscillator is covered with a SiO2 protective thin layer (2), the surface acoustic wave device outputs an electricsignal with the changed oscillation frequency to the oscillation circuit (11), and the oscillation circuit (11) detects abrupt change of the oscillation frequency of the electric signal and outputs the oscillation frequency to realize icing early warning and monitoring. The icing sensor is advantaged in that the icing sensor has high detection sensitivity and good temperature stability, and can timely warn freezing, so the surface acoustic wave technology is easy to implement.

Description

technical field [0001] The invention relates to the field of icing sensors, in particular to an icing sensor based on a surface acoustic wave oscillator. Background technique [0002] Icing phenomena widely exist in nature and in the reality of human production and life. In the past, the detection of icing conditions was seldom implemented, on the one hand, because of the low demand and low requirements; on the other hand, because of the lack of feasible technical means. However, icing has caused more and more negative impacts on human society and even more harm. For example, there are icing detection problems in roads and aircraft safety. However, the icing monitoring of roads and aircraft requires small size and flexible measurement. sensor. In order to monitor the icing condition of the road surface, aircraft and develop an effective road icing safety warning system, the icing sensor plays a vital role, and it must be very sensitive to the thickness of the ice as well a...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low sensitivity, poor real-time performance and difficult implementation in the existing icing sensors. In order to achieve the above object, the present invention proposes a icing sensor based on surface acoustic waves. : including a surface acoustic wave device and an oscillating circuit (11), and also including a packaging tube shell (6) and a water-permeable membrane (7);

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