CN102680084A - Light distribution measuring device and method for crop canopy - Google Patents
Light distribution measuring device and method for crop canopy Download PDFInfo
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- CN102680084A CN102680084A CN2012101251313A CN201210125131A CN102680084A CN 102680084 A CN102680084 A CN 102680084A CN 2012101251313 A CN2012101251313 A CN 2012101251313A CN 201210125131 A CN201210125131 A CN 201210125131A CN 102680084 A CN102680084 A CN 102680084A
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Abstract
The invention discloses a light distribution measuring device and a method for crop canopy and relates to the technical field of light distribution measurement. The device comprises a bearing unit, a receiving unit and at least one light sensor, wherein the bearing unit comprises a supporting part and a bearing part which is the same as leaves of a to-be-measured plant in shape; the light sensors are arranged on the bearing part respectively and are connected in series sequentially; and one of the light sensors is connected with the receiving unit. According to the invention, the bearing par of the bearing unit, which is the same as the leaves of the to-be-measured plant in shape, is used for bearing the light sensor, so that the measuring position can be adjusted conveniently, the natural shape of the leaves of the plant is not damaged, and the precision of light distribution measuring is improved.
Description
Technical field
The present invention relates to light distribution measuring technical field, light apparatus for measuring distribution and method in particularly a kind of crop canopies.
Background technology
The radiation delivery that is determined as in the canopy of radiation profiles is laid a good foundation with Study on Distribution Law in the plant canopy, is the main method of verifying the radiation model.
In recent years, along with the development of modern auto-Detection Technology, the observation instrument of light in the multiple special crop canopies has appearred.As: LI-190SA point type and LI-191SA line formula photosynthetically active radiation light quantum analyzer that LI-COR company produces; The SunScan Canopy Analyzer that the Delta-T instrument company of Britain produces; The AccuPAR Canopy Analyzer of U.S. Decagon instrument company, main body are 80 PAR probes that are uniform-distribution with on the probe of a 80cm, and through a small-sized operating terminal, have the ability that marshalling is measured to probe.Aspect the light distribution measuring instrument of development voluntarily, people such as Karine Chenu have developed Turtle_6 and Turtle_16 measuring instrument in 2008 based on the Turtle modular concept.
These light apparatus for measuring distribution can carry out the light distribution measuring of plant canopy; But mode has nothing in common with each other; LI-190SA point type and LI-191SA line formula can distribute to the light on specified point and the line and measure; The SunScan Canopy Analyzer can provide the average radiation value to the radiation profiles on the line, and the AccuPAR Canopy Analyzer can obtain the light intensity value of 80 probes on the probe, and Turtle_6 and Turtle_16 then can measure the scattered light distribution value of specified point preferably.
But the major defect of above-mentioned smooth apparatus for measuring distribution is: the point measurement appearance is more thick and heavy, is difficult to be installed to the plant leaf blade assigned address, even install, also can cause plant leaf blade loss natural form, brings error to measurement; The shortcoming of line formula measurement mechanism is that the measuring position is difficult to adjustment, can't measure the intensity information of assigned address, and SunScan Canopy Analyzer, AccuPAR Canopy Analyzer also have this defective; Turtle_6 and Turtle_16 measuring instrument can be measured the light distribution information of specified point in the crop canopies, but it also can't be attached on the plant leaf blade, and can't measure the intensity information of a plurality of points simultaneously; In addition, various smooth apparatus for measuring distribution all can't be measured the intensity information of a plurality of any specified points simultaneously more than.
Summary of the invention
The technical matters that (one) will solve
The technical matters that the present invention will solve is: how to be convenient to adjust the measuring position and can not make plant leaf blade loss natural form, to improve the precision of light distribution measuring.
(2) technical scheme
For solving the problems of the technologies described above; The invention provides light apparatus for measuring distribution in a kind of crop canopies; Said device comprises: load bearing unit, receiving element and at least one optical sensor; Said load bearing unit comprise support section and with the bearing part of crop leaf homomorphosis to be measured, said at least one optical sensor is located on the said bearing part respectively and is connected in series successively, an optical sensor in said at least one optical sensor is connected with said receiving element.
Preferably; Said device also comprises support and sky sensor; The top of said support is positioned at the canopy top of said crop to be measured, and said sky sensor is located at the top of said support, and said sky sensor is connected with a optical sensor in said at least one optical sensor.
Preferably, said optical sensor is provided with optical filter.
Preferably, said load bearing unit is a bonding jumper.
The invention also discloses a kind of measuring method, said method comprising the steps of based on light apparatus for measuring distribution in the described crop canopies:
S1: utilize the support section on the load bearing unit that said load bearing unit is fixed, make on the said load bearing unit to contact with crop leaf to be measured with the bearing part of crop leaf homomorphosis to be measured;
S2: at least one optical sensor is located at the measured place on the said bearing part as required respectively;
S3: the top of sky sensor being located at support;
S4: said receiving element is every to carry out signals collecting one time through preset interval time, to realize light distribution measuring in the canopy of crop leaf to be measured.
Preferably, further comprising the steps of before the step S1:
S0: choose crop leaf to be measured, according to the form processing load bearing unit of said crop leaf to be measured, to realize bearing part and the crop leaf homomorphosis to be measured on the load bearing unit.
Preferably, the optical sensor among the step S2 is provided with optical filter;
After carrying out signals collecting among the step S4, the signal of gathering is reduced.
(3) beneficial effect
The present invention is convenient to adjust the measuring position and can not be made plant leaf blade loss natural form through assigning to place optical sensor with the supporting part of crop leaf homomorphosis to be measured on the load bearing unit, has improved the precision of light distribution measuring.
Description of drawings
Fig. 1 is the structural representation according to light apparatus for measuring distribution in the crop canopies of an embodiment of the present invention;
Fig. 2 is the synoptic diagram of optical filter to the light intensity optical filtering of varying strength.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
The device of this embodiment comprises: with load bearing unit, receiving element and at least one optical sensor of crop leaf homomorphosis to be measured, said at least one optical sensor is located on the said load bearing unit respectively and is connected with said receiving element respectively.
Occur for avoiding optical sensor excess of stroke situation occurring, preferably, said optical sensor is provided with optical filter.
For the area that prevents load bearing unit excessive, thereby crop leaf to be measured is blocked, in this embodiment, said load bearing unit is preferably bonding jumper.
The invention also discloses a kind of measuring method, said method comprising the steps of based on light apparatus for measuring distribution in the described crop canopies:
S1: will fix with the load bearing unit of crop leaf homomorphosis to be measured, said load bearing unit is contacted with crop leaf to be measured;
S2: at least one optical sensor is located at the measured place on the said load bearing unit as required respectively;
S3: said at least one optical sensor is connected with said receiving element respectively;
S4: said receiving element is every to carry out signals collecting one time through preset interval time, to realize light distribution measuring in the canopy of crop leaf to be measured.
Preferably, further comprising the steps of before the step S1:
S0: choose crop leaf to be measured, according to the form processing load bearing unit of said crop leaf to be measured, to realize load bearing unit and crop leaf homomorphosis to be measured.
Preferably, the optical sensor among the step S2 is provided with optical filter;
After carrying out signals collecting among the step S4, the signal of gathering is reduced.
Embodiment
With reference to Fig. 1, in the present embodiment, optical sensor is owing to being positioned over the plant leaf blade surface, therefore; When guaranteeing measuring accuracy, reducing sensor weight also is emphasis, and therefore, sensor adopts the ISL29004 optical sensor; This sensor mass is less, and can guarantee that obtaining data has higher precision, but when big Tanaka's measuring light distributes, occurs the situation of light intensity outrange easily; Therefore, on sensor, add optical filter, owing to added optical filter, therefore; Need carry out confirming of filter factor to the light intensity of varying strength, thereby carry out the reduction of acquired signal, with the correct light intensity value of assurance system output.Through measuring, it is 11.90g that single-sensor adds optical filter weight.
Because the restriction of data transmission; Every circuit is only allowed 8 sensors, and each circuit is furnished with a notebook (being receiving element) record data, adopts the less data line of quality to connect between sensor; Data line is furnished with 15cm, 20cm and three length of 30cm; Data line weight is 6.09g (15cm long data line) in practical application, selecting, and wherein, Data Transport Protocol is the I2C bus protocol;
When crop leaf to be measured is measured, comprise the steps:
According to crop leaf to be measured design light built form and built fixed form: the main form of crop leaf of at first confirming preadmission row light distribution measuring; With the corn is example; Selected premeasuring photodistributed maize leaf on it; Measure its vein form with digitizer, select the aluminum strip (be bonding jumper, its weight is 0.3g/cm) of certain-length to be processed into the vein tracing pattern; The front end of aluminum strip has 10cm vacant, and there is about 80cm the vacant of (specifically according to the blade tip of crop leaf to be measured apart from the distance decision on ground) rear end.The aluminum strip front end inserts the leaf sheath of institute's crop leaf to be measured with the space between the stem stalk and with rope binding reinforcing; Insert in the soil rear end; So fixing aluminum strip is consistent with leaf morphology, can place optical sensor above it, as can on aluminum strip, evenly placing a plurality of optical sensors.
Design measurement environment according to concrete crop growth environment: circuit one end need prolong the canopy top of a sky sensor to said crop leaf to be measured, and to measure the outside light intensity of canopy, sensor external will keep level.The other end of every circuit extends to the canopy outside and is connected to notebook through the data-switching mouth; Because need distributing to canopy light, experiment carries out Continuous Observation; It is interior to prevent that the long-time irradiation of sunshine from causing temperature too high that notebook need be positioned over chest, and chest needs certain distance arranged to reduce chest to the photodistributed influence of canopy apart from measurement colony.
With reference to Fig. 2, the reduction of luminous intensity measurement data: the received light intensity of optical sensor is the light intensity after optical filter filters, and for obtaining the actual light intensity of measuring position, needs to reduce to measuring light intensity.Experiment shows that optical filter is linear change to the light intensity optical filtering of varying strength, confirms that therefore the reduction formula is L=6600.0 * Va, and wherein Va is the sensor actual measured value, and L is actual measurement light intensity (unit is the lux).
Per 3 seconds records of sensor on this measurement mechanism are also stored a secondary data, and therefore, this measurement mechanism can carry out continuous detecting to the light intensity of crop canopies assigned address.Measured data can be used for the checking of crop canopies analogy method, also can be used for analyzing the continuous variation of crop designated organ light intensity.
Above embodiment only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (7)
1. light apparatus for measuring distribution in the crop canopies; It is characterized in that; Said device comprises: load bearing unit, receiving element and at least one optical sensor; Said load bearing unit comprise support section and with the bearing part of crop leaf homomorphosis to be measured, said at least one optical sensor is located on the said bearing part respectively and is connected in series successively, an optical sensor in said at least one optical sensor is connected with said receiving element.
2. device as claimed in claim 1; It is characterized in that; Said device also comprises support and sky sensor; The top of said support is positioned at the canopy top of said crop to be measured, and said sky sensor is located at the top of said support, and said sky sensor is connected with a optical sensor in said at least one optical sensor.
3. device as claimed in claim 1 is characterized in that said optical sensor is provided with optical filter.
4. according to claim 1 or claim 2 device is characterized in that said load bearing unit is a bonding jumper.
5. the measuring method based on light apparatus for measuring distribution in each described crop canopies in the claim 1～3 is characterized in that, said method comprising the steps of:
S1: utilize the support section on the load bearing unit that said load bearing unit is fixed, make on the said load bearing unit to contact with crop leaf to be measured with the bearing part of crop leaf homomorphosis to be measured;
S2: at least one optical sensor is located at the measured place on the said bearing part as required respectively;
S3: the top of sky sensor being located at support;
S4: said receiving element is every to carry out signals collecting one time through preset interval time, to realize light distribution measuring in the canopy of crop leaf to be measured.
6. method as claimed in claim 5 is characterized in that, and is further comprising the steps of before the step S1:
S0: choose crop leaf to be measured, according to the form processing load bearing unit of said crop leaf to be measured, to realize bearing part and the crop leaf homomorphosis to be measured on the load bearing unit.
7. method as claimed in claim 5 is characterized in that the optical sensor among the step S2 is provided with optical filter;
After carrying out signals collecting among the step S4, the signal of gathering is reduced.
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| CN2012101251313A CN102680084B (en) | 2012-04-25 | 2012-04-25 | Light distribution measuring device and method for crop canopy |
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| CN2012101251313A CN102680084B (en) | 2012-04-25 | 2012-04-25 | Light distribution measuring device and method for crop canopy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065055A (en) * | 2013-01-15 | 2013-04-24 | 北京农业信息技术研究中心 | Calculating method for light distribution in sunlight greenhouse |
| CN103106678A (en) * | 2013-01-18 | 2013-05-15 | 北京农业信息技术研究中心 | Crop canopy light distribution animation synthesis method |
| CN103557934A (en) * | 2013-10-25 | 2014-02-05 | 北京农业信息技术研究中心 | Device for measuring light distribution in crop canopy |
| CN104568145A (en) * | 2015-01-08 | 2015-04-29 | 中国科学院遥感与数字地球研究所 | System and method for observing plant canopy photosynthetically active radiation absorptivity |
| CN109724915A (en) * | 2018-11-20 | 2019-05-07 | 北京农业信息技术研究中心 | A kind of crop canopies structural analysis device and method |
| CN110546452A (en) * | 2017-04-21 | 2019-12-06 | 发茂特有限公司 | Product and method for measuring the surface topography of crops or pastures |
| CN110857884A (en) * | 2018-08-23 | 2020-03-03 | 湖北省农业科学院经济作物研究所 | Method and system for determining distribution rule of photosynthetic effective radiation of mulberry canopy |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065055A (en) * | 2013-01-15 | 2013-04-24 | 北京农业信息技术研究中心 | Calculating method for light distribution in sunlight greenhouse |
| CN103065055B (en) * | 2013-01-15 | 2015-08-12 | 北京农业信息技术研究中心 | Light distribation computing method in heliogreenhouse |
| CN103106678A (en) * | 2013-01-18 | 2013-05-15 | 北京农业信息技术研究中心 | Crop canopy light distribution animation synthesis method |
| CN103106678B (en) * | 2013-01-18 | 2016-01-20 | 北京农业信息技术研究中心 | Crop canopies Light distribation animation synthesizing method |
| CN103557934A (en) * | 2013-10-25 | 2014-02-05 | 北京农业信息技术研究中心 | Device for measuring light distribution in crop canopy |
| CN104568145A (en) * | 2015-01-08 | 2015-04-29 | 中国科学院遥感与数字地球研究所 | System and method for observing plant canopy photosynthetically active radiation absorptivity |
| CN110546452A (en) * | 2017-04-21 | 2019-12-06 | 发茂特有限公司 | Product and method for measuring the surface topography of crops or pastures |
| CN110857884A (en) * | 2018-08-23 | 2020-03-03 | 湖北省农业科学院经济作物研究所 | Method and system for determining distribution rule of photosynthetic effective radiation of mulberry canopy |
| CN109724915A (en) * | 2018-11-20 | 2019-05-07 | 北京农业信息技术研究中心 | A kind of crop canopies structural analysis device and method |
| CN109724915B (en) * | 2018-11-20 | 2021-06-29 | 北京农业信息技术研究中心 | Crop canopy structure analysis device and method |
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| CN102680084B (en) | 2013-11-20 |
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