Laser cleaning process monitoring method based on acoustic emission technology
An acoustic emission technology and laser cleaning technology, which are used in material analysis, cleaning methods and utensils, chemical instruments and methods using acoustic emission technology, etc., can solve the problems of expensive equipment, poor anti-interference ability, and cumbersome signal processing. The effect of cheap equipment, improved reliability, and simple signal processing
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Embodiment 1
[0040] Such as Figure 1 to Figure 5 As shown, this embodiment discloses a laser cleaning process monitoring method based on acoustic emission technology, the monitoring method mainly includes the following specific steps:
[0041] Step S1: Place and position the carbon steel sample on the nanosecond near-infrared fiber laser X / Y / Z workbench, and focus the laser so that the spot focus is on the surface of the carbon steel rust layer.
[0042] Step S2: then place the sensor, perform an amplitude curve measurement test according to the attenuation characteristics of the acoustic emission signal of the rusted layer of the workpiece, and determine that the sensor is coated with vaseline and placed at a distance of 8mm from the acoustic emission source (rust removal area).
[0043] Step S3: Build the acoustic emission detection device, use the signal cable to connect the sensor to the preamplifier, connect the output end of the preamplifier to the PCI-2 data acquisition card, and s...
Embodiment 2
[0059] Such as Figures 1 to 5 As shown, this embodiment discloses an acoustic emission monitoring method in a pulsed laser cleaning process with simple structure and use, high precision and stable performance, so as to solve the problem that the existing laser cleaning technology does not have real-time detection and improve the cleaning efficiency. The conundrum of quality and efficiency.
[0060] To achieve the above object, the present invention takes the following technical solutions:
[0061] (1) Real-time monitoring system for pulsed laser cleaning process based on acoustic emission technology, see figure 1 , characterized in that it includes a near-infrared nanosecond fiber laser processing system, a PCI-2 data acquisition card, two preamplifiers, and two acoustic emission nano-30 resonant sensors; the acoustic emission sensor is installed on the rust of the workpiece, The output channel of the sensor is connected to the input channel of the preamplifier, and the ou...
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