CN106885812A - Seedling alms bowl damage testing method and apparatus during a kind of crop seedling clamping seedling taking based on CT technologies - Google Patents
Seedling alms bowl damage testing method and apparatus during a kind of crop seedling clamping seedling taking based on CT technologies Download PDFInfo
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- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
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- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Abstract
The invention discloses seedling alms bowl damage testing method and apparatus during a kind of crop seedling clamping seedling taking based on CT technologies, including：Seedling clamping seedling taking device is made, the seedling box for placing crop seedling, the scanning under crop seedling difference gripping state, the extraction of seedling alms bowl mesopore is made.Wherein clamp the making of seedling taking device：Support column connect base and cover plate；Sliding block is fixed on cover plate bottom surface, and sliding block is hinged with seedling taking arm, seedling taking arm lower end geometrical clamp pin；Gripping screw rod two ends pass seedling taking arm, are coordinated by screw thread with nut and realize pressing from both sides tightening up or opening for pin.The making of seedling box：Outer wall is cylinder, and inwall is matched to be inverted truncated rectangular pyramids, size with Plug seedling seedling alms bowl size.The present invention carries out tomoscan using CT scanner to the crop Plug seedling under different gripping states, hole in seedling alms bowl is extracted and three-dimensional visualization, newborn hole and gap are produced and extend inside research seedling alms bowl, and foundation is provided for seedling taking end effector structures design and grip parameter selection.
Description
Technical field
Field, particularly a kind of crop seedling clamping seedling taking process based on CT technologies are transplanted the invention belongs to crop seedling
Middle seedling alms bowl damage testing method and apparatus.
Background technology
It is main to be taken out crop seedling using seedling claw gripping seedling alms bowl when crop seedling is transplanted with transplanter automatic seedling taking,
During this method seedling taking, if the seedling taking angle of seedling claw, gripping depth and gripping amount etc. gripping parameter and the choosing of seedling claw structure
Select improper, seedling alms bowl can be made broken or crop seedling can not reliably be gripped out, cause seedling taking to fail.For this problem, Han Lv
Change et al. passes through experiment test seedling claw in the different seedling takings for gripping under parameters (claming angle, gripping power and clamping deflection)
Success rate；Tong Junhua etc. with seedling claw claming angle, presss from both sides pin quantity, seedling alms bowl moisture content, Huang with cucumber Plug seedling as research object
Melon Plug seedling growing way, seedling medium proportioning etc. be influence factor, with seedling claw to the gripping power of seedling alms bowl as optimization aim, carry out list
Factorial experiments, obtain optimal influence factor horizontal combination；Wang Yue construction profile feature (the pointer shapes that have studied seedling claw such as brave
Shape, spatula shape, U-shaped shape), the effect that is lifted to matrix shear behavior of seedling alms bowl moisture content and plant growth initial stage seedlings root
Really, and using seedling alms bowl percentage of head rice as test index, seedling claw structure, seedling alms bowl moisture content, seedling age are drawn using orthogonal test method
Primary and secondary influence factor and excellent level.These methods are all with the structure of seedling claw and gripping parameter as experimental factor, by taking
Seedling experiment obtains suitable seedling claw structure and gripping parameter, but crop seedling is in seedling taking, and breakage is produced from seedling alms bowl inside
Raw, it is impossible to the generation and extension in the primary gap in inside and newborn gap when directly observation folder pin grips seedling alms bowl, it is impossible to understand
Relation between root system and breakage, causes seedling picking mechanism to design the theoretical foundation of shortage science, constrains automatic transplantation technique
Development.
CT technologies are achieved successfully in the medical research field such as bone micro-structure and blood vessel imaging, and it can realize that internal structure shows
The three-dimensional reconstruction of micro- image, the extraction of Medical Morphology parameter.Because CT technologies have nondestructive testing on object internal structure, this is special
Point, has studied using the growing state of the technology for detection crop root in soil, and be planted in for spring wheat by such as Richard J
In the column barrel of different phosphate fertilizers supply mode, spring wheat root soil is scanned with Micro-CT, and will scan what is obtained
Tomography picture is imported in the softwares of Volume Graphics StudioMax version 2.1, is increased using the region in software
Instrument adjusts image threshold, and root system is partitioned into generation 3-D view from tomography picture, compares root system and is supplied in different phosphate fertilizers
In the case of, the situation of growing of root system；The wheat of three kinds of different cultivars is planted in soil compaction by Saoirse R etc. respectively
In for the cylindrical barrel of 1.1g/cm3 and 1.5g/cm3, the 2nd, 5 and 12 days after wheat germination are with x-ray ct technology to wheat
Root system is scanned, and is extracted root system using the softwares of Volume Graphics StudioMax version 2.0, comparative analysis
Different cultivars, soil compaction and growth number of days in the case of root system total length and volume change, and soil mesopore with
The change of depth；On this basis, Saoirse R are again using x-ray ct technology to being grown in different soils (clay loam and husky earth
Soil) and different soils compactness (1.2g/cm3 and 1.6g/cm3) under tomato seedling carry out Non-Destructive Testing, tomato seeds germinate
Afterwards the 1st to 10 day, all it is scanned daily, research root system volume, root area, main root length, average rhizome, root curvature etc. become
Change situation.The technological difficulties of these researchs are mainly concentrated in splitting root system from soil and extract and three-dimensionalreconstruction, such as
What measures the physical parameter of root system.Using the generation of CT technology for detection crop seedling alms bowl content brokens during gripping, difficult point is：
1st, when seedling alms bowl is gripped, folder pin will be inserted inside seedling alms bowl gripping pawl, and folder pin is made up of steel material, the density of folder pin and seedling alms bowl
Differ greatly, when being scanned to the seedling alms bowl under gripping state with CT machines, folder pin is different with the attenuation coefficient of seedling alms bowl, can produce
Pseudomorphism, causes the tomography picture of generation unintelligible, it is impossible to root system and hole are extracted from seedling alms bowl；2nd, in order to avoid X-ray
The harm of Radiation On Human body, CT scan sample must be carried out in the space of closing, and crop seedling and seedling picking mechanism will be placed on
In the sample container of certain size and shape, seedling picking mechanism will meet seedling taking angle, gripping depth, gripping amount, folder aciculiform shape etc.
The adjustment of structure and parameter realizes that these functions again can be for the clamping seedling picking mechanism of CT scan, it is necessary to design；3rd, scanning life
Into tomography picture in, many noises can be produced, while the hole of many very littles is distributed with seedling alms bowl, these holes and noise without
Method is distinguished, the visual effect of influence tomography picture mesopore 3-D view.
The content of the invention
It is an object of the invention to explore crop seedling clamp seedling taking during seedling alms bowl internal injury produce and formed
Process, there is provided seedling alms bowl damage testing method and apparatus during a kind of crop seedling clamping seedling taking based on CT technologies, design can
Crop seedling for CT scan clamps seedling taking device, and hole and crack of the seedling alms bowl during gripping are extracted in segmentation, and are removed
Noise, the distribution of three-dimensional visualization observation seedling alms bowl mesopore, the generation and extension in crack are that the structure of seedling taking end effector sets
The selection of meter and gripping parameter provides theoretical foundation.
The present invention proposes a kind of clamping seedling taking device for the scanning of CT crop seedlings, including base, support column, lid
Plate, sliding block, seedling taking arm, gripping screw rod, gripping nut and folder pin；The base is in donut shape；The cover plate is rounded；
The annulus base of the support column connection bottom and the circular cover on top；The base and the cover plate are parallel to each other；It is described
Sliding block is fixed on cover plate bottom surface by passing the screw of long slot bore on cover plate；Seedling taking arm is hinged with below the sliding block, it is described to take
Using gripping screw rod and gripping nut connection between seedling arm；Folder pin is fixed with through hole below the seedling taking arm；The gripping
Screw rod two ends pass the through-hole groove on the seedling taking arm；The gripping screw rod two ends pass through screw thread and the gripping nut screw connection；
The gripping nut passes through-hole groove on the seedling taking arm, and grips the two ends of nut and block the through-hole groove.
In said apparatus, the folder pin below each seedling taking arm is two, and two folder pins are symmetric.
In said apparatus, the density of material of the folder pin is 1.1~1.9 times of the seedling alms bowl density of crop seedling.
In said apparatus, the support column is 3.
The present invention proposes seedling alms bowl damage testing method, bag during a kind of crop seedling clamping seedling taking based on CT technologies
Include following steps：
S1, make for CT scan crop seedling clamp seedling taking device：Crop seedling clamps seedling taking device by base, branch
Dagger, cover plate, sliding block, seedling taking arm, gripping screw rod, gripping nut and folder pin composition, base is in donut shape, and cover plate is in circle
Shape, the base of bottom and the cover plate on top are connected with support column, and base and cover plate are parallel to each other, and screw is by the elongated slot on cover plate
Hole, fixes two sliding blocks below cover plate, an articulated seedling taking arm on each sliding block, with a folder between two seedling taking arms
Take screw rod and two gripping nut connections, fixed two symmetrical folder pins in the through hole below each seedling taking arm.
S2, make seedling box for placing crop seedling：Seedling box is made up of uniform thin-walled material, and outside is cylinder,
In truncated rectangular pyramids shape is inverted, the size for being inverted truncated rectangular pyramids is identical with the size of the seedling alms bowl of vegetables Plug seedling, the wall thickness of seedling box for inside
It is 1~3mm.
Scanning under S3, crop seedling difference gripping state：Seedling alms bowl is carried out to Plug seedling respectively successively to be not inserted into pressing from both sides needle-like
State, seedling alms bowl insertion folder needle-like state and folder pin are clamped to maximum displacement status scan, and the scanning under different gripping states must be continuous
Carry out, that is, scanning through will immediately carry out the scanning of NextState after a state；Clamped to folder pin from seedling alms bowl insertion folder needle-like state
Scanning to maximum displacement state can be decomposed into the different scannings clamped under displacement of folder pin.
S4, seedling alms bowl mesopore are extracted：The all hole threshold values read in CT scanner operating system are averaged, can be with
The average threshold scope for obtaining hole is 0~N, to all tomography pictures perform segmentation extract order, will segmentation extract order in
Threshold range be set to N+1~1000, the three-dimensional visualization figure of the other materials for obtaining removing hole in seedling alms bowl, to generation
3-D graphic perform extract largest object order, attribute setting finally is carried out to 3-D view, by the object in 3-D view
Attribute is set to 0, and the attribute of background is set greater than 0 numerical value, and the visible oBject for regenerating is exactly hole.
In the above method, the density of material that pin is pressed from both sides in the step S1 is the 1.1~1.9 of the seedling alms bowl density of crop seedling
Times.
In the above method, base, support column and cover plate are made up of PVC material in the step S1.
In the above method, seedling alms bowl density of the density of material of seedling box less than crop seedling in the step S2.
Specifically beneficial effect is the present invention：The crop Plug seedling under different gripping states is broken using CT scanner
Layer scanning, extracts and three-dimensional visualization to the hole segmentation in seedling alms bowl, the generation in the newborn hole in research seedling alms bowl inside and gap and
Extension, for the selection of the structure design and gripping parameter of seedling taking end effector provides theoretical foundation.
Brief description of the drawings
Fig. 1 is the structural representation that crop seedling clamping seedling taking device and seedling box are put into sample container；
Fig. 2 is the main structure diagram that crop seedling clamps seedling taking device；
Fig. 3 is the side structure schematic view of Fig. 2；
Fig. 4 is the overlooking the structure diagram of Fig. 2；
Fig. 5 is the A-A cross section structure diagrams of Fig. 2；
Fig. 6 is the cross section structure diagram of seedling box；
Fig. 7 is the overlooking the structure diagram of Fig. 6；
Fig. 8 is that crop seedling alms bowl extracts the hole three-dimensional visualization figure for obtaining using the inventive method segmentation；
Fig. 9 is that the hole three-dimensional visualization figure for obtaining is extracted in the direct hole segmentation of crop seedling alms bowl.
Marked in figure：1：Base；2：Support column；3：Cover plate；4：Sliding block；5：Seedling taking arm；6：Gripping screw rod；7：Gripping spiral shell
It is female；8：Folder pin；9：Seedling box；10：Sample container；5-1：Through hole；3-1：Long slot bore.
Specific embodiment
Below in conjunction with the accompanying drawings, by taking seedling alms bowl damage testing during Tomato Plug Seedling clamping seedling taking as an example, to reality of the invention
The process of applying is described further.
S1, make for CT scan Tomato Plug Seedling clamp seedling taking device
When carrying out tomoscan to Tomato Plug Seedling using CT scanner, Tomato Plug Seedling and clamping seedling taking device are all necessary
It is placed in the sample container 10 of CT scanner, as shown in figure 1, the inner space of the sample container 10 of CT scanner is in cylinder
Shape, it is a diameter ofIt is highly 10cm, Tomato Plug Seedling clamping seedling taking device, such as Fig. 2, Fig. 3, Fig. 4, Fig. 5 is devised for this
Shown, Tomato Plug Seedling clamps seedling taking device by base 1, support column 2, cover plate 3, sliding block 4, seedling taking arm 5, gripping screw rod 6, gripping
Nut 7 and folder pin 8 are constituted, and base 1 is in donut shape, and cover plate 3 is rounded, and the base 1 of bottom and upper is connected with support column 2
The cover plate 3 in portion, base 1 and cover plate 3 are parallel to each other, and screw fixes two by the long slot bore 3-1 on cover plate 3 below cover plate 3
Sliding block 4, an articulated seedling taking arm 5 on each sliding block 4, with a gripping screw rod 6 and two gripping spiral shells between two seedling taking arms 5
Female 7 connect, fixed two symmetrical folder pins 8 in the through hole 5-1 below each seedling taking arm 5；Wear at gripping screw rod two ends
The through-hole groove gone out on seedling taking arm, gripping screw rod 6 two ends are provided with the screw thread of same size, in opposite direction, the gripping of two ends screw thread
Screw rod two ends are coordinated with gripping nut by the screw thread, rotate gripping screw rod, drive gripping nut along gripping screw rod straight line fortune
Dynamic, gripping nut passes the through-hole groove on seedling taking arm and grips the two ends of nut and blocks the through-hole groove, so in gripping spiral shell
Main line can drive seedling taking arm to be rotated around the pin joint with cover plate when moving, realize that two seedling taking arms are tightened up or opened；For
The image that the density of material of clamping each part of seedling taking device is caused apparently higher than seedling alms bowl density when avoiding scanning is interfered, and causes life
Into tomography picture it is unintelligible, base, support column and cover plate are made up of PVC material；In order to avoid the material of the folder pin of insertion seedling alms bowl
The image that material density is caused apparently higher than seedling alms bowl density is interfered, while press from both sides pin in making the tomography picture of generation being again clearly distinguishable from
Each part in seedling alms bowl, the density of material for pressing from both sides pin should be greater than the seedling alms bowl density of Tomato Plug Seedling, but density variation can not be too
Greatly, can otherwise cause image to interfere, make the tomography picture of generation unintelligible, while press from both sides pin keeps certain hardness again, it is ensured that
Folder pin can reliably grip seedling alms bowl, and the material for pressing from both sides pin can be glass fibre or aluminium alloy.
S2, make seedling box for placing Tomato Plug Seedling
In order to obtain the tomography picture of seedling alms bowl same position and angle under different gripping states, in two-dimension picture point
Analyse hole change, in each CT scan, seedling alms bowl need to keep identical locus, devised for this one for place kind
The seedling box 9 of eggplant Plug seedling, as shown in Figure 6, Figure 7.Seedling box 9 is made up of uniform thin-walled material, and outside is cylinder, and inside is in fall
Truncated rectangular pyramids shape is put, the size for being inverted truncated rectangular pyramids is identical with the size of the seedling alms bowl of Tomato Plug Seedling, in order to avoid the material of seedling box
The image that density is caused apparently higher than seedling alms bowl density is interfered, while X-ray can be relatively easy to penetrate seedling box, the wall thickness of seedling box
Should be as far as possible thin, the wall thickness of seedling box is set to 1~3mm, the seedling alms bowl density of the density of material less than Tomato Plug Seedling of seedling box.
Scanning under S3, Tomato Plug Seedling difference gripping state
Seedling alms bowl is carried out to Tomato Plug Seedling respectively successively and is not inserted into folder needle-like state, seedling alms bowl insertion folder needle-like state and folder pin clamping
To maximum displacement status scan；Seedling alms bowl is put into seedling box first, seedling box is placed into vegetables Plug seedling by base inner ring presss from both sides
Hold inside seedling taking device, then seedling box and Tomato Plug Seedling clamping seedling taking device are placed into the sample container of CT scanner together
In, tomoscan is carried out to seedling alms bowl；After the completion of scanning, seedling box and vegetables Plug seedling clamping seedling taking device are taken from sample container
Go out, pin will be pressed from both sides and inserted inside seedling alms bowl by the through hole below seedling taking arm, place into and be scanned in sample container；With same side
Method is scanned to the seedling alms bowl under clamped condition；In order to Tomato Plug Seedling seedling alms bowl places moisture steaming for a long time in reducing scanning process
The influence to three-dimensional imaging quality and distribution of pores is sent out, the scanning under different gripping states must be carried out continuously, that is, scan through
The scanning of NextState is carried out after one state immediately；In order that the seedling alms bowl tomography picture of scanning generation has identical every time
Orientation, in scanning every time, the relative position of seedling box, Tomato Plug Seedling clamping seedling taking device and sample container is remained not
Become；In order to be beneficial to the changes in spatial distribution process of seedling alms bowl inside root system and hole during analysis is gripped, from seedling alms bowl insertion folder pin
The scanning that state is clamped to maximum displacement state to folder pin can be decomposed into the scanning under the different clamping displacements of folder pin.
S4, seedling alms bowl mesopore are extracted
In the tomography picture of scanning generation, closing is drawn in the region where directly identifying hole to any hole
Loop wire, can read the threshold value in the closed loop wire region of drafting in CT scanner operating system, be existed using same method
Any pore region is identified in other tomography pictures, the loop wire of closing is drawn to any hole, and read closed loop wire endoporus
The threshold value of gap, all hole threshold values to reading are averaged, and the average threshold scope that can obtain hole is 0~15；To institute
There is tomography picture to perform segmentation extraction order, the threshold range extracted in order will be split and be set to 16~1000, obtain seedling alms bowl
The three-dimensional visualization figure of middle other material bodies for removing hole, in the 3-D graphic at this moment generating, not only includes and is connected to
Seedling medium and root system together, also comprising a large amount of small discrete points, these discrete points are the formation of noise in tomography picture
, to generate 3-D graphic perform extract largest object order, that removes 3-D graphic in small discrete point, most
Attribute setting is carried out to 3-D view afterwards, the thingness in 3-D view is set to 0, and the attribute of background is set to greatly
In 0 numerical value, at this moment object becomes transparent, and background colour becomes visible oBject, and the visible oBject for regenerating is exactly hole.
CT scan effect
Experiment is carried out in agricultural equipment engineering college of Jiangsu University laboratory, the calculating used in this experiment implementation process
Machine faultage image scanning device is the SCANCO MEDICAL μ CT100 of SCANCO Medical AG companies of Switzerland production, scanning
When by Tomato Plug Seedling, clamping seedling taking device and seedling box is positioned over internal capacity diameter and height is respectively's
In shuttle, the sweep parameter of CT scanner is set to：Voltage 70kVp, the μ A of electric current 50, integrating time 200ms, resolution ratio 45
μm, scanning filter is set to aluminium filter.CT scanner operating system in itself and IPL language (image are used after the completion of scanning
Processing language) to obtain seedling alms bowl tomography picture process；With frame selection tool to the hole in tomography picture
The loop wire of closing is drawn, the threshold value in closed loop wire is read in the operating system of CT scanner, to other multiple tomographs
Identical operation is carried out in piece, the hole threshold value in plurality of pictures is obtained, hole threshold value is averaged；Delete all to hole
The closed loop wire of drafting, the contour line of closing is drawn with frame selection tool and the automatic select tool of profile to the seedling alms bowl in tomography picture
Bar；Operation described in step S4 is performed to all of tomography picture, hole 3-D graphic is generated.In order to the hole three for generating
The effect for tieing up figure is done one and is compared, and performing segmentation to all tomography pictures extracts order, will split the threshold value extracted in order
Scope is set to 0~15, directly generates the three-dimensional visible figure of hole.As shown in Figure 8, Figure 9, it can be seen that threshold value is set
It is 0~15, in the hole 3-D graphic for directly generating, includes substantial amounts of noise, it is impossible to see the distribution of seedling alms bowl internal void,
The hole 3-D graphic extracted with method of the present invention, is clear that the distribution of seedling alms bowl internal void, crack institute
Location and shape.
The detection damaged for other crop seedlings clamping seedling taking seedling alms bowl, is referred to Tomato Plug Seedling clamping in the present invention
The damaged detection method of seedling taking seedling alms bowl.
Those listed above is a series of to be described in detail only for feasibility implementation method of the invention specifically
Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention
Or change should be included within the scope of the present invention.
Claims (8)
1. a kind of crop seedling based on CT technologies clamps seedling alms bowl damage testing method during seedling taking, it is characterised in that including
Following steps：
S1, make for CT scan crop seedling clamp seedling taking device：Crop seedling clamping seedling taking device include base (1),
Support column (2), cover plate (3), sliding block (4), seedling taking arm (5), gripping screw rod (6), gripping nut (7) and folder pin (8)；The base
(1) in donut shape；The cover plate (3) is rounded；The annulus base (1) of support column (2) the connection bottom and top
Circular cover (3)；The base (1) and the cover plate (3) are parallel to each other；The sliding block (4) is by through elongated slot on cover plate
The screw in hole (3-1) is fixedly connected on cover plate bottom surface；It is hinged between the seedling taking arm (5) and the sliding block (4)；The gripping spiral shell
The two ends of bar (6) are provided with screw thread, and gripping screw rod (6) two ends pass the through-hole groove of the seedling taking arm (5)；The gripping screw rod
(6) screw thread coordinates between two ends and gripping nut (7)；It is described gripping nut (7) through the seedling taking arm through-hole groove, and
And the through-hole groove is blocked at the two ends of gripping nut (7)；Gripping nut (7) can be driven when screw rod (6) is rotated gripping
Linear motion, then drive seedling taking arm (5) to be rotated around the pin joint with the sliding block (4), realize tightening up or pine for seedling taking arm (5)
Open；Two folders pin (8) are fixed in through hole (5-1) below the seedling taking arm (5)；
S2, make seedling box for placing crop seedling：Seedling box (9) is made up of uniform thin-walled material, and outer wall is cylinder, interior
In truncated rectangular pyramids shape is inverted, the size for being inverted truncated rectangular pyramids is matched wall with the size of the seedling alms bowl of vegetables Plug seedling, and the wall thickness of seedling box is 1
~3mm；
S3, crop seedling is carried out into tomoscan under different gripping states：Seedling alms bowl is carried out to Plug seedling respectively successively to be not inserted into
Folder needle-like state, seedling alms bowl insertion folder pin but folder pin undamped state and folder pin are clamped to maximum displacement state these three states and are swept
Retouch, the scanning that seedling alms bowl insertion folder needle-like state is clamped to maximum displacement state to folder pin is decomposed under the different clamping displacements of folder pin
Scanning, the scanning under different gripping states is carried out continuously, that is, carry out sweeping for next state immediately after scanning through a state
Retouch；
Hole in S4, seedling alms bowl is extracted：All hole threshold values are read in CT scanner operating system to average, and obtain hole
Average threshold 0~N of scope, to all tomography pictures perform segmentation extract order, will split extract order in threshold range
N+1~1000 are set to, the three-dimensional visualization figure of the other materials of removing hole in seedling alms bowl are obtained, to the 3-D graphic for generating
Perform and extract largest object order, attribute setting finally is carried out to 3-D view, the thingness in 3-D view is set to
0, the attribute of background is set greater than 0 numerical value, the visible oBject for regenerating as hole.
2. a kind of crop seedling based on CT technologies according to claim 1 clamps seedling alms bowl damage testing side during seedling taking
Method, it is characterised in that the density of material that pin (8) is pressed from both sides in the step S1 is 1.1~1.9 times of the seedling alms bowl density of crop seedling.
3. a kind of crop seedling based on CT technologies according to claim 1 clamps seedling alms bowl damage testing side during seedling taking
Method, it is characterised in that base (1), support column (2) and cover plate (3) are made up of PVC material in the step S1.
4. a kind of crop seedling based on CT technologies according to claim 1 clamps seedling alms bowl damage testing side during seedling taking
Method, it is characterised in that seedling alms bowl density of the density of material of seedling box (9) less than vegetables Plug seedling in the step S2.
5. it is a kind of for CT crop seedlings scanning clamping seedling taking device, it is characterised in that including base (1), support column (2),
Cover plate (3), sliding block (4), seedling taking arm (5), gripping screw rod (6), gripping nut (7) and folder pin (8)；The base (1) is in concentric
Toroidal；The cover plate (3) is rounded；The annulus base (1) of support column (2) the connection bottom and the circular cover on top
(3)；The base (1) and the cover plate (3) are parallel to each other；The sliding block (4) is by passing the spiral shell of long slot bore on cover plate (3-1)
Nail is fixed on cover plate bottom surface；The sliding block (4) is hinged with seedling taking arm (5) below, using gripping screw rod between the seedling taking arm (5)
(6) connected with gripping nut (7)；Folder pin (8) is fixed with through hole (5-1) below the seedling taking arm (5)；The gripping screw rod
(6) two ends pass the through-hole groove on the seedling taking arm (5)；Described gripping screw rod (6) two ends pass through screw thread and the gripping nut
(7) coordinate；Gripping nut (7) passes through-hole groove on the seedling taking arm (5), and grips the two ends of nut (7) and block
The through-hole groove.
6. it is according to claim 5 it is a kind of for CT crop seedlings scanning clamping seedling taking device, it is characterised in that each
Folder pin (8) below seedling taking arm (5) is two, and two folder pins are symmetric.
7. it is according to claim 5 it is a kind of for CT crop seedlings scanning clamping seedling taking device, it is characterised in that it is described
The density of material of folder pin (8) is 1.1~1.9 times of the seedling alms bowl density of crop seedling.
8. it is according to claim 5 it is a kind of for CT crop seedlings scanning clamping seedling taking device, it is characterised in that it is described
Support column (2) is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710189744.6A CN106885812B (en) | 2017-03-28 | 2017-03-28 | Crop seedling pot damage detection method based on CT technology |
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| US11436824B2 (en) * | 2017-12-05 | 2022-09-06 | Jiangsu University | Water stress detection method for tomatoes in seedling stage based on micro-CT and polarization-hyperspectral imaging multi-feature fusion |
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