Design of Plant Light Source System Based on Multi-Light Source Module

Fig. 3. Structure of plant cultivation rack. (a) Plant culture rack structure; (b) plant culture rack section view; (c) plant culture rack section view and related parameters

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Fig. 4. Structure of light source module 3

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Fig. 5. S/N values corresponding to each factor level. (a) Illumination uniformity; (b) color-mixed uniformity

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Fig. 6. Relationship of lighting quality and H. (a) Illumination uniformity; (b) color-mixed uniformity

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Fig. 7. Final optimized results of culture rack on different sampling surfaces. Horizontal sampling plane (a) illuminance distribution; (b) light quality distribution; (c) chromaticity diagram; vertical sampling plane; (d) illuminance distribution; (e) light quality distribution; (f) chromaticity diagram

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Fig. 8. Shape of LED chip. (a) I₁; (b) I₂; (c) I₃; (d) I₄; (e) I₅

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Fig. 9. Relationship between lighting quality and LED chip shape. (a) Illumination uniformity; (b) color-mixed uniformity

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Fig. 10. Relationship between lighting quality and LED lamp bead spacing. (a) Illumination uniformity; (b) color-mixed uniformity

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Fig. 11. Plant growth simulation test model

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Fig. 12. Relationship between plant height and light source lighting quality. (a) Illumination uniformity; (b) color-mixed uniformity

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Fig. 13. Physical test model

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Table 1. Influencing factors and standards of plant cultivation racks
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Table 1. Influencing factors and standards of plant cultivation racks
Code Factor Number of levels Level 1 Level 2 Level 3 Level 4
A h 4 0.25 0.50 0.75 1.00
B s /mm 4 12.5 25.0 37.5 50.0
C H /mm 4 200 300 400 500

Table 2. Experimental design parameters using L₁₆(4⁵) orthogonal table

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Table 2. Experimental design parameters using L₁₆(4⁵) orthogonal table

SerialNo.	A	B	C	Plane	Illuminationuniformity /%	Color-mixeduniformity /%	S/N ofilluminationuniformity	S/N ofcolor-mixeduniformity
1	1	1	1	J	89.664	89.616	38.856	39.047
				V	51.307	90.529	34.203	39.135
2	1	2	2	J	93.479	86.415	39.414	38.712
				V	81.128	81.634	38.183	38.237
3	1	3	3	J	94.528	82.221	39.511	38.299
				V	89.887	90.246	39.073	39.108
4	1	4	4	J	92.561	85.547	39.329	38.644
				V	90.780	85.135	39.160	38.602
5	2	1	2	J	91.889	90.000	39.265	39.085
				V	84.705	85.091	38.558	38.597
6	2	2	1	J	89.511	87.775	39.037	38.864
				V	81.146	86.989	38.185	38.789
7	2	3	4	J	94.247	86.148	39.485	38.704
				V	95.109	87.517	39.564	38.841
8	2	4	3	J	90.884	88.457	39.169	38.935
				V	92.917	88.414	39.362	38.930
9	3	1	3	J	89.201	85.538	39.007	38.643
				V	88.052	88.658	38.895	38.954
10	3	2	4	J	93.039	87.947	39.373	38.884
				V	92.983	89.999	39.368	39.084
11	3	3	1	J	91.629	88.242	39.241	38.913
				V	84.265	83.350	38.513	38.418
12	3	4	2	J	92.176	88.221	39.292	38.911
				V	92.357	81.416	39.309	38.214
13	4	1	4	J	92.142	87.449	39.289	38.835
				V	89.295	86.281	39.016	38.718
14	4	2	3	J	91.665	81.694	39.244	38.244
				V	92.667	86.433	39.338	38.733
15	4	3	2	J	91.642	80.662	39.241	38.133
				V	88.566	88.071	38.945	38.897
16	4	4	1	J	91.543	87.546	39.232	38.845
				V	88.769	84.271	38.965	38.513

Table 3. Contribution rate of each factor to illumination uniformity
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Table 3. Contribution rate of each factor to illumination uniformity
Code Horizontal plane /% Vertical plane /%
A 11.72 28.22
B 46.03 29.18
C 43.11 42.59

Table 4. Contribution rate of each factor to color-mixed uniformity
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Table 4. Contribution rate of each factor to color-mixed uniformity
Code Horizontal plane /% Vertical plane /%
A 34.73 5.54
B 35.19 29.96
C 30.07 64.49

Table 5. Comparison of physical test results and simulation results
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Table 5. Comparison of physical test results and simulation results
Condition Plane Physical test result Simulation result
Illumination uniformity /% J 87.38 91.35
V 84.09 89.71
Color-mixed uniformity /% J 86.26 87.67
V 86.89 88.54

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Bo Zhang, Shangsheng Wen, Bingxu Ma, Feiyu Jiao, Yunle Lu, Weizhao Huang. Design of Plant Light Source System Based on Multi-Light Source Module[J]. Acta Optica Sinica, 2020, 40(19): 1923001

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