Application Cases

Experiment Name: Ultrasonic Guided Wave Ice Detection

Experiment Content: The use of ultrasonic guided waves to achieve quantitative identification of aircraft icing can significantly enhance the safety of aircraft operations. To verify the effectiveness of numerical simulations, a static/dynamic ice detection experimental system was developed to assess the feasibility of ice detection based on Lamb waves under spray conditions. Additionally, wavelet transform, Hampel median filter, and moving average filter were employed to analyze time-of-flight and detection time signals. Ultimately, it was experimentally verified that ultrasonic guided waves can effectively identify the amount of ice accumulation during dynamic icing processes.

Research Direction: Ice Detection

Testing Equipment: ATA-1220D broadband amplifier, function/arbitrary waveform generator, data acquisition card, etc.

Figure 1: Schematic diagram of the experimental setup

Experiment Process: The experimental signal processing system consists of a computer, function/arbitrary waveform generator, broadband amplifier, data acquisition card, PZT transmitter, PZT receiver, cooling system, anti-fog camera, nozzle, and T-type thermocouple. The function/arbitrary waveform generator can produce a sine signal with a Hanning window, which is amplified by the broadband amplifier and transmitted to the PZT transmitter, where it is used to generate Lamb waves. The PZT receiver is used to receive the Lamb waves, which are converted into electrical signals. The data acquisition board converts the analog signal from the PZT receiver into a digital signal. The computer is used to send instructions and process data through LabVIEW software. Furthermore, by constructing an ice accumulation identification algorithm to effectively parse the Lamb wave signals, effective identification of ice accumulation was achieved under both dynamic and static icing conditions.

Experiment Results:

Figure 2: Experimental Results

Experiments on the identification of different amounts of ice accumulation were conducted under dynamic/static icing conditions, and the results all verified a good positive correlation between the ToF/ToD peak signals and the amount of ice accumulation. For different degrees of ice accumulation, the ToD/ToF peak signals as indicators of ice accumulation identification demonstrated good detection performance.

Power Amplifier Recommendation: ATA-1220E Broadband Amplifier

Figure: Specifications of the ATA-1220E Broadband Amplifier