Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity

Feiyu Jiao; Shangsheng Wen; Bingxu Ma; Bo Zhang; Xinyu Jiang; Yunle Lu; Weizhao Huang; Qibao Wu

doi:10.3788/AOS202040.1822002

Journals >Acta Optica Sinica >Volume 40 >Issue 18 >Page 1822002 > Article

Acta Optica Sinica
Vol. 40, Issue 18, 1822002 (2020)

Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity

Feiyu Jiao^1、*, Shangsheng Wen^1、2、*, Bingxu Ma¹, Bo Zhang¹, Xinyu Jiang¹, Yunle Lu¹, Weizhao Huang¹, and Qibao Wu³

Author Affiliations

¹College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China

²State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, Guangdong 510640, China

³School of Intelligent Manufacturing and Equipment, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China

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DOI: 10.3788/AOS202040.1822002 Cite this Article Set citation alerts

Feiyu Jiao, Shangsheng Wen, Bingxu Ma, Bo Zhang, Xinyu Jiang, Yunle Lu, Weizhao Huang, Qibao Wu. Design of Stereo LED Plant Light Source System with High Spatial Illumination Uniformity[J]. Acta Optica Sinica, 2020, 40(18): 1822002 Copy Citation Text

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Fig. 1. Spatial illumination uniformity evaluation system

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Fig. 2. Scheme structures of plant growth shelves. (a) Scheme I; (b) scheme II; (c) scheme III

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Fig. 3. Local section of plant growth shelf in scheme I and related parameters

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Fig. 4. Local section of plant growth shelf in scheme II and related parameters

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Fig. 5. Local section of plant growth shelf in scheme III and related parameters

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Fig. 6. S_N corresponding to each level of each factor in scheme I. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 7. S_N corresponding to each level of each factor in scheme II. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 8. S_N corresponding to each level of each factor in scheme III. (a) Illumination uniformity of horizontal plane; (b) illumination uniformity of vertical plane; (c) color-mixed uniformity of horizontal plane; (d) color-mixed uniformity of vertical plane

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Fig. 9. Variation of each attribute with factor A. (a) Illumination uniformity and color-mixed uniformity of horizontal plane;(b) illumination uniformity and color-mixed uniformity of vertical plane

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Fig. 10. Variation of each attribute with factor C. (a) Illumination uniformity and color-mixed uniformity ofhorizontal plane; (b) illumination uniformity and color-mixed uniformity of vertical plane

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Fig. 11. Optimal result of plant growth shelf. (a) Illumination map of horizontal plane; (b) chromaticity map of horizontal plane; (c) full color-mixed map of horizontal plane; (d) illumination map of vertical plane; (e) chromaticity map of vertical plane; (f) full color-mixed map of vertical plane

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Fig. 12. Plant growth model

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Fig. 13. Illumination uniformity and color-mixed uniformity at each plant height. (a) Illumination uniformity and color-mixed uniformity of planting plane; (b) illumination uniformity and color-mixed uniformity of plant top plane; (c) illumination uniformity and color-mixed uniformity of plant side plane

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Fig. 14. Array LED structure and uniformity properties. (a) Array LED structure; (b) illuminance uniformity of reference surface at each plant height; (c) illuminance distribution of vertical reference plane

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Code	Factor	Number oflevels	Value
Code	Factor	Number oflevels	1	2	3
A	H	3	300 mm	400 mm	500 mm
B	L	3	150 mm	200 mm	250 mm
C	a	3	0.25	0.50	0.75
D	l	3	10 mm	15 mm	20 mm

Table 1. Influence factors of plant growth shelf in scheme I and its control levels

Code	Factor	Number oflevels	Value
Code	Factor	Number oflevels	1	2	3
A	H	3	300 mm	400 mm	500 mm
B	L	3	150 mm	200 mm	250 mm
C	h	3	20 mm	30 mm	40 mm
D	l	3	10 mm	15 mm	20 mm

Table 2. Influence factors of plant growth shelf in scheme II and its control levels

Code	Factor	Number of levels	Value
Code	Factor	Number of levels	1	2	3
A	H	3	300 mm	400 mm	500 mm
B	L	3	150 mm	200 mm	250 mm
C	a	3	0.25	0.50	0.75
D	h	3	20 mm	30 mm	40 mm
E	l	3	10 mm	15 mm	20 mm

Table 3. Influence factors of plant growth shelf in scheme III and its control levels

Experiment No.	Level				Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane/%	Color-mixeduniformityof verticalplane /%
Experiment No.	A	B	C	D	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane/%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	92.57	88.55	82.08	87.35
2	1	2	2	2	83.71	83.94	71.55	77.58
3	1	3	3	3	91.78	77.88	74.98	86.16
4	2	1	2	3	87.83	87.38	72.07	89.11
5	2	2	3	1	89.09	72.84	68.42	84.86
6	2	3	1	2	91.72	81.53	83.98	81.69
7	3	1	3	2	92.59	81.21	68.81	90.00
8	3	2	1	3	93.56	89.88	83.37	88.36
9	3	3	2	1	88.78	90.00	59.73	85.67

Table 4. L₉(3⁴) orthogonal experimental design in scheme I

Experiment No.	Level				Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
Experiment No.	A	B	C	D	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	88.27	76.64	68.17	87.84
2	1	2	2	2	92.96	82.98	71.82	83.94
3	1	3	3	3	91.50	85.97	78.72	74.90
4	2	1	2	3	91.30	90.00	71.35	83.83
5	2	2	3	1	91.76	78.61	70.36	84.55
6	2	3	1	2	93.06	78.66	72.28	84.59
7	3	1	3	2	93.20	77.40	64.53	90.00
8	3	2	1	3	92.80	86.05	71.80	81.73
9	3	3	2	1	94.21	70.44	65.06	88.75

Table 5. L₉(3⁴) orthogonal experimental design in scheme II

ExperimentNo.	Level					Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
ExperimentNo.	A	B	C	D	E	Illuminationuniformityof horizontalplane /%	Color-mixeduniformityof horizontalplane /%	Illuminationuniformityof verticalplane /%	Color-mixeduniformityof verticalplane /%
1	1	1	1	1	1	82.59	85.66	67.90	75.90
2	1	2	2	2	2	73.37	82.02	63.77	82.48
3	1	3	3	3	3	64.88	76.43	75.97	70.73
4	2	1	1	2	2	82.18	85.86	66.76	85.32
5	2	2	2	3	3	82.01	72.41	64.71	75.36
6	2	3	3	1	1	69.48	68.60	52.88	76.51
7	3	1	2	1	3	81.25	81.55	64.26	86.62
8	3	2	3	2	1	77.85	80.02	45.99	81.97
9	3	3	1	3	2	81.13	78.54	63.91	88.39
10	1	1	3	3	2	83.70	90.00	75.69	88.69
11	1	2	1	1	3	74.80	76.10	67.50	78.07
12	1	3	2	2	1	69.14	82.31	59.75	85.00
13	2	1	2	3	1	80.07	76.25	51.02	90.00
14	2	2	3	1	2	79.86	76.77	63.07	79.62
15	2	3	1	2	3	80.29	79.86	65.99	75.40
16	3	1	3	2	3	83.96	76.90	62.76	81.96
17	3	2	1	3	1	79.32	73.38	48.32	82.72
18	3	3	2	1	2	71.15	66.57	54.24	80.35