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Automatic detection device and method for through hole rate of honeycomb sandwich composite acoustic liner

An automatic detection and composite material technology, which is applied in the direction of measuring devices, optical devices, image communication, etc., to improve detection efficiency and reduce workload

Active Publication Date: 2021-12-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] Different from the detection of general assembly holes, the surface hole size of the composite acoustic lining is at the millimeter level, which is much smaller than the general assembly holes, so it is difficult to use the existing non-contact measurement technology for data collection and quality inspection

Method used

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  • Automatic detection device and method for through hole rate of honeycomb sandwich composite acoustic liner
  • Automatic detection device and method for through hole rate of honeycomb sandwich composite acoustic liner

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Embodiment Construction

[0051] The above-mentioned content of the present invention will be described in further detail below by the form of the embodiment, but this should not be interpreted as the scope of the above-mentioned theme of the present invention being limited to the following embodiments, all technologies realized based on the above-mentioned content of the present invention belong to scope of the invention.

[0052] Such as figure 1 As shown, an automatic rapid positioning and size measurement method for a surface hole of a knife plate includes the following steps:

[0053] S1. Use an automatic detection device to collect three-dimensional data of the workpiece to be measured;

[0054] Step S1 specifically includes:

[0055] Step S101, according to the planned trajectory, uniformly collect the two-dimensional contour data of the surface of the workpiece to be measured multiple times;

[0056] Step S102, calculating the positional relationship between trajectories according to a certain...

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Abstract

The invention discloses an automatic detection device and method for the through hole rate of a honeycomb sandwich composite acoustic liner. The detection device is composed of a customized tool data acquisition system, a moving mechanism system and a data processing system. The data acquisition system uses a two-dimensional laser contour sensor to acquire surface three-dimensional point cloud data of a to-be-detected sample piece in a parallel movement shooting mode, is connected with a high-performance graphic workstation, and imports the acquired data for subsequent processing; the moving mechanism system is composed of an industrial robot, and a two-dimensional laser contour sensor is fixed to the tail end of the moving mechanism system and used for supporting the data acquisition system to conduct translation scanning. The data processing system is composed of the high-performance graphic workstation, plays a role in path planning and data storage in the data acquisition process, and outputs a detection result through a proposed improved algorithm. The device and the method can be used for automatic and rapid quality detection of large workpieces with digital models, and are especially suitable for measurement scenes of rapid detection of surface holes of acoustic liners of aircraft engines.

Description

technical field [0001] The invention relates to an automatic detection device and method for the porosity of an acoustic lining of a honeycomb sandwich composite material, which is suitable for point cloud data processing in the field of computer vision. Background technique [0002] Traditional composite material acoustic lining surface hole inspection technology relies on manual inspection by quality inspectors, and often uses contact measurement methods. However, the manual detection method has disadvantages such as low precision, low efficiency, and high labor intensity. The contact measurement method used is also easy to reduce the quality of the acoustic lining surface and internal noise-absorbing structure. [0003] Non-contact measurement has the advantages of fast acquisition speed, large single acquisition volume, and no damage to the surface quality of the measured object because it does not need to contact the measured object, and can quickly collect a large numb...

Claims

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Application Information

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IPC IPC(8): G01B11/24G06K9/62G06T7/00G06T7/10G06T7/62H04N13/221
CPCG01B11/24G06T7/0004G06T7/10G06T7/62H04N13/221G06T2207/10028G06T2207/30108G06F18/23G01B11/08G01B11/22B25J19/022B25J11/00G01B11/2522G05B2219/37608B25J9/1684G05B19/4207G05B2219/45061G06T7/12G06T2207/30164G06T2207/30242G06T2207/20076B25J9/1661B25J9/1664B25J13/087B25J13/088
Inventor 汪俊单忠德唐皓刘元朋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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