Method for testing acoustic emission signal transmission characteristics of helicopter component based on harmonic wavelet packet
A technology of acoustic emission signals and propagation characteristics, which is applied in the processing of detection response signals and material analysis using acoustic emission technology. It can solve problems such as energy leakage and inflexible frequency band selection, and achieve the effect of overcoming energy leakage.
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specific Embodiment approach 1
[0037] Specific implementation mode 1: the following combination Figure 1 to Figure 6 In this embodiment, the method for testing the propagation characteristics of the acoustic emission signal of helicopter components based on the harmonic wavelet packet in this embodiment includes the following steps:
[0038] Arrange A acoustic emission sensors at equal intervals on the surface of the helicopter component to be tested, perform a standard lead breaking test on the helicopter component to be tested to generate test signals, and simultaneously collect the audio signals collected by A acoustic emission sensors, where A is a positive integer; The process of processing the signal collected by each acoustic emission sensor is the same, the specific process is:
[0039] Step 1: Collect the test signal x(r) obtained by each acoustic emission sensor, r=1, 2....N, N is the number of points of the collected test signal x(r), and is an integer greater than 2;
[0040] Step 2: Determine the nu...
specific Embodiment approach 2
[0057] Embodiment 2: This embodiment is a further description of Embodiment 1. The A is 6, and the 6 acoustic emission sensors are arranged at intervals of 50 mm from the helicopter component under test.
specific Embodiment approach 3
[0058] Specific embodiment 3: This embodiment is a further description of the first or second embodiment. The test signal x(r) adopts the average value of the test signal generated by multiple standard section lead tests of the helicopter component under test.
[0059] In this embodiment, the average value of the test signal obtained by multiple experiments is used as the basis of signal processing, which improves the accuracy of the collected signal.
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