Quality Inspection of Hole Parameters of Aircraft Surface Based on Incomplete Point Cloud Data

Table 1. Point distribution of cone angle boundary
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Table 1. Point distribution of cone angle boundary
Serial number Total points Number of outliers
L₁ L₂ L₃ L₄
1 72 68 3 3
2 54 63 7 6
3 60 61 0 0
4 65 62 3 6

Table 2. The comparison between the method in this paper and other methods

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Table 2. The comparison between the method in this paper and other methods

Measurement		Countersinking parameters
Measurement		Inner counterbore diameter/mm	Cone angle/（°）	Normal deviation angle/（°）	Counterbore depth/mm
Method of this article	Counterbore（a）	9.999	89.949°	0.000°	3.009
	Counterbore（b）	5.984	89.903°	3.066°	2.962
	Counterbore（c）	5.967	89.901°	5.025°	3.006
	Counterbore（d）	5.991	89.951°	2.039°	--
Moving least squares	Counterbore（a）	9.956	89.931°	0.060°	3.033
	Counterbore（b）	5.976	89.639°	3.035°	3.019
	Counterbore（c）	5.744	89.418°	4.592°	2.839
	Counterbore（d）	7.926	89.758°	2.451°	--
Computer vision detection	Counterbore（a）	9.921	89.841°	0.230°	3.023
	Counterbore（b）	5.960	89.567°	2.845°	2.853
	Counterbore（c）	5.867	89.501°	4.572°	2.830
	Counterbore（d）	5.928	89.647°	1.607°	--

Table 3. Plain counterbore inspection

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Table 3. Plain counterbore inspection

Measurement	Plane countersinking parameters
	Inner countersunk diameter/mm			Normal deviation angle/（°）			Countersunk depth/mm
	Measurements	Actual value	Error value	Measurements	Actual value	Error value	Measurements	Actual value	Error value
A1 A2 A3 A4	6.001	6.010	-0.009	0.151	0.050	0.101	2.991	3.012	-0.021
	6.001	6.012	-0.011	0.129	0.031	0.098	2.988	3.009	-0.021
	5.983	5.995	-0.012	-0.009	0.062	-0.071	3.007	2.992	0.015
	6.029	6.014	0.015	-0.084	0.036	-0.12	2.973	2.990	-0.017
B1 B2 B3 B4	5.984	5.996	-0.012	3.039	2.922	0.117	2.962	2.983	-0.021
	5.975	5.991	-0.016	2.677	2.786	-0.109	2.998	2.985	0.013
	5.991	5.987	0.004	3.131	3.027	0.104	3.009	3.004	0.005
	6.003	5.990	0.013	3.111	3.209	-0.098	2.961	2.982	-0.021
C1 C2 C3 C4	5.967	5.990	-0.023	5.025	4.904	0.121	2.998	2.986	0.012
	5.975	5.988	-0.013	4.887	4.986	-0.099	3.006	2.988	0.018
	6.032	6.012	0.02	5.219	5.099	0.120	2.973	2.990	-0.017
	5.992	6.010	-0.018	4.750	4.866	-0.116	3.091	3.088	0.003
D1 D2 D3 D4	9.999	10.011	-0.012	0.000	0.003	-0.003	3.009	2.994	0.015
	9.980	9.990	-0.01	0.330	0.230	0.1	2.968	2.990	-0.022
	9.978	9.991	-0.013	0.194	0.090	0.104	2.997	2.983	0.014
	9.975	9.990	-0.015	0.110	0.240	-0.13	2.976	2.996	-0.02

Table 4. Measurement of normal deviation angle of counterbore on complex curved surface

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Table 4. Measurement of normal deviation angle of counterbore on complex curved surface

Serial number	Surface countersunk parameters
	Cone angle extreme difference	Measured value	Standard value
	$θ_{d i f} \times 10^{- 4}$ /（°）	$θ_{m e a}$ /（°）	$θ_{s t d}$ /（°）
1	2.546	2.038	2.150
2	2.546	1.819	1.943
3	2.383	1.700	1.820
4	1.584	1.834	1.932
5	2.587	2.023	2.023
6	1.891	1.685	1.820
7	0.000	1.772	1.897
8	1.617	0.314	0.413
9	2.383	0.288	0.408
10	1.683	0.346	0.447
11	1.617	0.367	0.503
12	2.111	0.485	0.598
13	2.225	0.460	0.576
14	1.963	0.434	0.543
15	1.551	0.120	0.023
16	1.683	0.189	0.290
17	1.999	0.141	0.031
18	1.133	0.204	0.287
19	1.246	0.185	0.272
20	0.671	0.121	0.185
21	1.751	0.107	0.210

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Hongping WANG, Xin LIU, Shichen ZHAO, Yu WANG, Lei WANG. Quality Inspection of Hole Parameters of Aircraft Surface Based on Incomplete Point Cloud Data[J]. Acta Photonica Sinica, 2022, 51(12): 1212006

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