CN112014072A - Illumination uniformity detection device of vegetation lamps and lanterns - Google Patents
Illumination uniformity detection device of vegetation lamps and lanterns Download PDFInfo
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- CN112014072A CN112014072A CN202010884821.1A CN202010884821A CN112014072A CN 112014072 A CN112014072 A CN 112014072A CN 202010884821 A CN202010884821 A CN 202010884821A CN 112014072 A CN112014072 A CN 112014072A
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- 238000005286 illumination Methods 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 241001465382 Physalis alkekengi Species 0.000 title claims description 3
- 230000008635 plant growth Effects 0.000 claims abstract description 14
- 241000196324 Embryophyta Species 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 241000208822 Lactuca Species 0.000 description 3
- 235000003228 Lactuca sativa Nutrition 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000023077 detection of light stimulus Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
- G01M11/0214—Details of devices holding the object to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
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- Physics & Mathematics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention belongs to the technical field of automatic instruments and meters, and particularly relates to a device for detecting the illumination uniformity of a plant growth lamp. The device comprises a lamp holder 1 for mounting a lamp, a three-axis driven mobile platform 3 with an illumination sensor 2, a light intensity sensor mounted on the mobile platform and a PC 4. Before detection, the plant growth lamp is required to be installed on the lamp holder and is operated to a stable state after being turned on, the PC controls the three stepping motors to enable the light intensity sensors to scan point by point in a three-dimensional space, one point measures one light intensity data, and the computer generates a light intensity distribution diagram according to the three-dimensional coordinates and the detection data so as to calculate the illumination uniformity index of the plant cultivation surface. The device can effectively collect the illumination intensity of the plant cultivation surface, improve the detection efficiency and the detection precision, avoid human errors and system errors, and avoid errors in the data transmission and calculation processes.
Description
Technical Field
The invention belongs to the technical field of automatic instruments and meters, relates to the technologies of light environment characteristic detection, data acquisition, data processing and the like of lamps, and particularly relates to a device for detecting the illumination uniformity of a plant growth lamp.
Background
The illumination intensity and illumination uniformity indexes are important indexes of plant growth lamps and agricultural special lamps, at present, manual measurement is mainly carried out point by point, a measurement result is input into a special application program or software, and then a light intensity distribution graph is generated manually or automatically. The light intensity distribution of the plant growth lamp is usually detected at a height vertically spaced from the lamp by a certain distance, tens or hundreds of detection points are uniformly arranged on a horizontal plane with the projection of the lamp as the center, and the light intensity at the positions is measured point by point. The plant growth lamp is generally measured according to the effective illumination surface of the lamp, and the conventional method is that a plant cultivation model is firstly built in a laboratory, the lamp is adjusted to a proper height, dozens or hundreds of detection points are uniformly arranged on the surface (generally, a plant canopy plane) which can be irradiated by the lamp, and then the illumination intensity of a specific position is manually detected one by one. In the detection process, one lamp needs to be repeatedly detected for multiple arrangement modes, hundreds of points are measured once, thousands of points are measured once, tens of hours or days are needed for detection once, and weeks are needed for detection of multiple schemes.
The difficulty of manual detection of light intensity distribution is that: firstly, the measurement points are multiple, the workload is large, and the operation is required by professional personnel; secondly, the hand-held instrument or the probe detects at a specific position, and both horizontal positioning and vertical positioning have large errors, so that human errors in the detection process are easily caused; thirdly, the detection time is long, the sensor needs to be calibrated every day, the lamp needs to be preheated in advance, whether the calibration is still to be confirmed in the actual situation, and the detected system error cannot be avoided; fourthly, errors are easy to occur in the data recording, processing and transferring processes; fifthly, partial indexes are manually calculated, and partial precision is easily lost. In order to solve the above-mentioned problem of the light intensity distribution, technical improvements from both the detection software and hardware are required. Through multiple technical discussion and engineering practice, hardware and software are improved and confirmed for multiple times, and finally the core technology of the invention patent is formed. In the aspect of hardware, a three-axis stepping motor is used for driving a probe to move, positioning is carried out at any position in a three-dimensional space, the single-axis positioning precision is 0.2mm, and the system error and the human error can be reduced when the three-dimensional positioning precision is less than or equal to 1 mm; in the aspect of software, firstly, a 3D drawing software format file (such as an STL file format) is identified, detection points are automatically and uniformly arranged on an illumination coverage surface, then, a three-axis stepping motor is driven to measure illumination data one by one, finally, an illumination uniformity index is automatically calculated by using the measurement data, and finally, a special detection report is automatically generated. The manual detection period is a plurality of days, and the detection period can be shortened to 1-4 hours after the device is used, so that the detection efficiency, the positioning precision and the data accuracy are effectively improved.
Disclosure of Invention
In order to overcome a series of defects in the prior art, the present invention provides a device for detecting the uniformity of illumination of a lamp for plant growth, so as to solve the problems in the background art.
The invention discloses a device for detecting the illumination uniformity of a plant growth lamp, which comprises a lamp bracket 1 which is horizontally placed, an illumination sensor 2 which is fixed on a moving platform, the moving platform 3 which can move left and right, back and forth and up and down, a PC (personal computer) 4 for controlling and acquiring data and a support 5, wherein the moving platform 3 comprises three stepping motors, a stepping motor driver and a horizontal platform, the number of the stepping motors is three, the illumination sensor 2 is fixed on the moving platform 3, and the three stepping motors can drive the moving platform 3 provided with the illumination sensor 2 to move in a three-dimensional space in the support 5, so that the illumination intensity is dynamically acquired.
Preferably, the PC 4 establishes a plant canopy curved surface through a 3D model and illumination shadow analysis, regards a plurality of dense plant canopies as a simple curved surface, and uniformly sets a plurality of detection points on the curved surface, and the PC 4 controls three stepping motors of the mobile platform 3 to move point by point according to the positions of the detection points.
Preferably, the PC 4 can collect data of the illumination sensor 2 in real time, and after the data is collected, the PC 4 controls the mobile platform 3 to move to the next detection point, so as to finally complete the point-by-point scanning work of the illumination intensity of the plant canopy curved surface.
Preferably, the PC 4 draws a light intensity distribution map according to the collected set of illumination data, and calculates each index of the illumination uniformity.
Preferably, the illumination sensor 2 can be replaced as required, and the collection wavelengths include: 380-760nm, 380-830nm, 400-700nm, 300-800nm and 300-3000 nm.
The invention has the following beneficial effects:
1. the invention adopts the three-axis stepping motor to drive the illumination sensor, can accurately position any point in a three-dimensional space, can move on the surface of the simulated plant cultivation canopy, and effectively collects the illumination intensity of the plant cultivation surface.
2. Compared with the traditional detection mode, the invention has the characteristics of accurate positioning, quick data acquisition and automation, improves the detection efficiency and the detection precision, and effectively avoids human errors and system errors;
3. the invention simplifies the data processing process, and the PC is used for automatically calculating the illumination intensity and illumination uniformity indexes of each point according to the algorithm, thereby improving the detection efficiency and avoiding errors in the data transmission and calculation processes.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention
FIG. 2 is a light intensity distribution diagram of the detection result of the embodiment of the present invention
The reference numbers in the figures are:
1. lamp stand, 2. light intensity sensor, 3. moving platform, 4.PC, 5. support
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used in the explanation of the invention, and should not be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In a broad embodiment of the present invention, an illumination uniformity detection device for a plant growth lamp, as shown in fig. 1, comprises a lamp holder 1 horizontally disposed, an illumination sensor 2, a movable platform 3 capable of moving left and right, back and forth, and up and down, a PC 4 for controlling and processing data, and a support 5.
The lamp holder 1 can be used for placing standard lamps for calibrating the illumination sensor 2 and also can be used for placing lamps to be tested, the lamps can be bulbs, lamp tubes and flat plates, the number of the lamps can be 1 or several, at most 100 lamps can be placed according to the size or specification of the lamps, the lamp holder is not provided with a power supply and a switch, and the power supply (direct current or alternating current) and the switch required for starting the lamps are provided from the outside. The lamp is always in working state during detection, and light intensity detection must be carried out after the lamp is stable in light emitting.
The light sensor 2 is used for collecting Photon Flux Density (PFD), the wavelength measuring range is plant photosynthetic effective radiation wave band (400-700nm), preferably plant physiological effective radiation wave band (300-800nm), and the unit of Photon flux density is mu mol m-2s-1. The illumination sensor can be replaced according to the requirement, and the acquisition wavelength is as follows: 380-760nm, 380-830nm, 400-700nm, 300-800nm and 300-3000 nm.
The illumination sensor 2 is fixed on the movable platform 3 and used for detecting the illumination intensity of a specific point, the position is kept unchanged in the detection process so as to continuously detect data, the detection is finished after the data are stabilized, and the detection is moved to the next detection point to carry out scanning detection one by one. The illumination sensor 2 starts detection after being calibrated once by a standard light source when being powered on every time, thereby ensuring the detection precision and reducing the system error as much as possible.
Moving platform 3 include step motor, step motor driver and a horizontal platform, step motor is three, moving platform 3 is controlled through the USB cable by PC 4, can drive moving platform 3 and move in front and back, about, 6 directions from top to bottom, realize locating moving platform 3 to the arbitrary point position in the inside three-dimensional space of support 5.
The PC 4 adopts a compatible computer, and special software is installed on the PC 4 to realize the work of stepping motor control, detection point management, data acquisition and data processing, thereby being capable of automatically finishing a detection report immediately while finishing detection. Specifically, the PC 4 and the illumination sensor 2 adopt an RS485 communication mode, and the PC and the stepping motor driver adopt a USB communication mode.
The support 5 is used for supporting the lamp holder 1 and the movable platform 3.
In one embodiment of the invention, the detection device provided by the invention is used for testing the illumination uniformity of a batch of 1.2m long straight-tube type LED plant growth lamps, and the result of selecting the model WR-LED5/3-T5-16W-I lamps is used for explaining the detection effect of the device. After the standard light source is used for calibrating the illumination sensor, 8 lamps to be tested are installed on the lamp holder, the luminous flux output is stable after the lamps are electrified for 30 minutes, and at the moment, the power actually consumed by the 8 lamps is tested by using the electrical parameter measuring instrument.
Because the lamp is used for cultivating lettuce, the distance between the lamp and the test plane is set to be 150mm in test software, and the test plane can simulate a plant canopy plane of the lettuce in the cultivation period. The test plane size was L1200mm × W600mm, and the interval between the detection points was set to 60mm in the test software, and a total of 21 × 11 detection points was 231 detection points.
The results are shown in the following table, which contains the illumination uniformity data.
The illumination intensity of the measured plane is uniformThe value. + -. standard deviation is 233.6. + -. 37.0. mu. mol m-2s-1The uniformity of illumination was 84.2%, and the optical quantum density efficiency was 1.79. mu. mol m-2J-1. The detection result shows that the difference of the illumination intensity of the center and the periphery of the detected plane is large, because the illumination intensity is 250 mu mol m-2s-1Is suitable for the illumination intensity of lettuce cultivation, so that 1 lamp is suggested to be added in the actual cultivation, and some light reflecting measures are provided to reduce the difference of the illumination intensity.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a light uniformity detection device of vegetation lamps and lanterns, its characterized in that, including lighting fixture (1) that the level was placed, fix light sensor (2) on moving platform, can control, around, moving platform (3), control and data acquisition of action handle PC (4) and support (5), moving platform (3) include step motor, step motor driver and a horizontal platform and constitute, step motor is three, be fixed with light sensor (2) on moving platform (3), it is three step motor can drive moving platform (3) of installing light sensor (2) and remove in the inside three-dimensional space of support (5) to dynamic collection illumination intensity.
2. The illumination uniformity detection device of a plant growth lamp as claimed in claim 1, wherein said PC (4) establishes a plant canopy curved surface through 3D modeling and illumination shadow analysis, and regards a dense plurality of plant canopies as a simple curved surface, and uniformly sets a plurality of detection points on the curved surface, and said PC (4) controls three stepping motors of the mobile platform (3) to move point by point according to the positions of the detection points.
3. The illumination uniformity detection device of a plant growth lamp as claimed in claim 1, wherein said PC (4) is capable of collecting data of said illumination sensor (2) in real time, after the collection is completed, said PC (4) controls said mobile platform (3) to move to the next detection point, and finally, the point-by-point scanning of the illumination intensity of the plant canopy curved surface is completed.
4. The device for detecting the uniformity of illumination of a lamp for plant growth according to claim 1, wherein said PC (4) is configured to draw a light intensity distribution map according to a set of collected illumination data and calculate the indicators of the uniformity of illumination.
5. The device for detecting the uniformity of illumination of a lamp for plant growth according to claim 1, wherein said illumination sensor (2) can be replaced as required, and the collection wavelengths are: 380-760nm, 380-830nm, 400-700nm, 300-800nm and 300-3000 nm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010884821.1A CN112014072B (en) | 2020-08-28 | 2020-08-28 | Illumination uniformity detection device of vegetation lamps and lanterns |
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| CN202010884821.1A CN112014072B (en) | 2020-08-28 | 2020-08-28 | Illumination uniformity detection device of vegetation lamps and lanterns |
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| CN112014072A true CN112014072A (en) | 2020-12-01 |
| CN112014072B CN112014072B (en) | 2023-04-07 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203298868U (en) * | 2013-05-30 | 2013-11-20 | 杭州灵彩科技有限公司 | Automatic detection spectrometer applied to plant growth lamps in agricultural production |
| CN205620025U (en) * | 2016-05-05 | 2016-10-05 | 福建农林大学 | Be applied to illumination detection device of vegetation lamp |
| CN206161154U (en) * | 2016-11-10 | 2017-05-10 | 哈尔滨理工大学 | LED lamps and lanterns production illumination automatic measuring device |
| CN207335871U (en) * | 2017-10-25 | 2018-05-08 | 上海增达科技股份有限公司 | Illumination uniformity based on grid walking detects caliberating device automatically |
| CN208537025U (en) * | 2018-08-03 | 2019-02-22 | 杭州远方光电信息股份有限公司 | A kind of plant illumination test macro |
| CN109443707A (en) * | 2018-11-26 | 2019-03-08 | 中国科学院长春光学精密机械与物理研究所 | A kind of area source brightness uniformity detection device and method |
| CN109520615A (en) * | 2018-12-27 | 2019-03-26 | 北京航天长征飞行器研究所 | Illumination uniformity tester and test method |
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2020
- 2020-08-28 CN CN202010884821.1A patent/CN112014072B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203298868U (en) * | 2013-05-30 | 2013-11-20 | 杭州灵彩科技有限公司 | Automatic detection spectrometer applied to plant growth lamps in agricultural production |
| CN205620025U (en) * | 2016-05-05 | 2016-10-05 | 福建农林大学 | Be applied to illumination detection device of vegetation lamp |
| CN206161154U (en) * | 2016-11-10 | 2017-05-10 | 哈尔滨理工大学 | LED lamps and lanterns production illumination automatic measuring device |
| CN207335871U (en) * | 2017-10-25 | 2018-05-08 | 上海增达科技股份有限公司 | Illumination uniformity based on grid walking detects caliberating device automatically |
| CN208537025U (en) * | 2018-08-03 | 2019-02-22 | 杭州远方光电信息股份有限公司 | A kind of plant illumination test macro |
| CN109443707A (en) * | 2018-11-26 | 2019-03-08 | 中国科学院长春光学精密机械与物理研究所 | A kind of area source brightness uniformity detection device and method |
| CN109520615A (en) * | 2018-12-27 | 2019-03-26 | 北京航天长征飞行器研究所 | Illumination uniformity tester and test method |
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