CN112540020B - Leaf class vegetables cutting mechanical properties testing arrangement - Google Patents
Leaf class vegetables cutting mechanical properties testing arrangement Download PDFInfo
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- CN112540020B CN112540020B CN202011374032.XA CN202011374032A CN112540020B CN 112540020 B CN112540020 B CN 112540020B CN 202011374032 A CN202011374032 A CN 202011374032A CN 112540020 B CN112540020 B CN 112540020B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/58—Investigating machinability by cutting tools; Investigating the cutting ability of tools
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention provides a testing device for mechanical characteristics of leaf vegetable cutting, which comprises a feeding assembly, a cutting assembly, a conveying assembly, an acquisition and analysis system and a control system, wherein the feeding assembly is connected with the cutting assembly; the relative feeding speed and height parameter change of the leaf vegetables to be cut relative to the cutting unit is realized through the motion combination of the translation pushing unit and the vertical lifting unit, so that the research on the cutting characteristics of the leaf vegetables to be cut by different harvesting speeds and the height of a cutting knife of a harvester in actual operation is realized; the cutting unit performs linear cutting motion through the stroke adjusting unit according to power provided by the cutting driving unit, and the cutting speed and the stroke of the cutting unit can be adjusted through the cutting driving unit and the stroke adjusting unit so as to realize the research on the cutting characteristics of the cutting unit for leaf vegetables to be cut at different cutting speeds and strokes; the change of the cutting power and cutting force in the cutting process and the state of the leaf vegetables to be cut before, during and after cutting is calculated and tested by the acquisition and analysis system, so that a data basis is provided for the design and parameter setting of the leaf vegetable harvester.
Description
Technical Field
The invention belongs to the field of agricultural machinery, and particularly relates to a device for testing mechanical characteristics of leaf vegetable cutting.
Background
The harvesting of the leaf vegetables is one of the links with the greatest labor intensity in the production of the leaf vegetables and is the final link for ensuring the phase and quality of She Caipin. At present, the cutting modes aiming at the harvesting of the leaf vegetables are mainly three types: the harvesting and cutting position of part of leaf vegetables in the harvesting period is lower than the harvesting ridge surface, and the band knife and the double-acting reciprocating type cutting knife are not suitable for cutting under the soil, so the single-acting reciprocating type cutting knife has better performance for the leaf vegetables with the cutting position lower than the harvesting ridge surface.
Because the existing leaf vegetable planting is lack of unified specifications, the planting modes are relatively disordered, the planting density of unit planting areas is different, the harvested quality is different due to the fact that the harvesting cutting states of different leaf vegetable varieties are different greatly according to different cutting parameters, and the planting modes and the planting density are different in different areas, so that the single-performance leaf vegetable harvester is difficult to meet the harvesting requirements of different leaf vegetables in different areas, and therefore the leaf vegetable harvesting cutting performance under different leaf vegetable varieties and different planting modes needs to be researched to improve the leaf vegetable cutting harvesting quality.
In order to solve the problems, corresponding research is carried out by scholars at home and abroad. Chinese patent CN109085081A discloses a multifunctional reciprocating type crop stem cutting test bed, which can perform cutting tests on different parts of crop stems with different diameters, can adjust the feeding speed, the line spacing, the plant spacing and the number of holes and plants of the stems, and can collect torque, cutting power consumption and cutting force, but the test bed only aims at single cutting performance factor of the stems, does not consider the state change of the crop cutting process, and is not suitable for researching the harvesting characteristics of leaf vegetables; chinese patent CN110108473A discloses a transverse stem and vine double-moving-blade cutting test device, which realizes simulation of vertical cutting of crop stems, but the test bed can only cut stationary crops, can not obtain cutting characteristics in a leaf vegetable harvesting process and leaf vegetable population states before, during and after cutting, and is difficult to realize simulation of leaf vegetable distribution conditions in an actual harvesting process.
Disclosure of Invention
Aiming at the technical problem, the invention provides a leaf vegetable cutting mechanical property testing device, which realizes the change of relative feeding speed and height parameters of leaf vegetables to be cut relative to a cutting unit through the movement combination of a translation pushing unit and a vertical lifting unit so as to realize the research of the cutting property of the leaf vegetables to be cut by different harvesting speeds and the height of a cutting knife of a harvester in actual operation; the cutting unit performs linear cutting motion through the stroke adjusting unit according to power provided by the cutting driving unit, and the cutting speed and the stroke of the cutting unit can be adjusted through the cutting driving unit and the stroke adjusting unit so as to realize the research on the cutting characteristics of the leaf vegetables to be cut at different cutting speeds and strokes of the cutting unit; the change of the cutting power and cutting force in the cutting process and the state of the leaf vegetables to be cut before, during and after cutting is calculated and tested by the acquisition and analysis system, so that a data basis is provided for the design and parameter setting of the leaf vegetable harvester.
The technical scheme of the invention is as follows: a testing device for mechanical characteristics of leaf vegetable cutting comprises a feeding assembly, a cutting assembly, a conveying assembly, an acquisition and analysis system and a control system;
the feeding assembly is arranged at the lower part of the front end of the conveying assembly; the feeding assembly comprises a translation pushing unit and a vertical lifting unit, the vertical lifting unit is positioned above the translation pushing unit, the vertical lifting unit is used for placing vegetables to be cut, the translation pushing unit can do linear motion along the cutting direction, and the vertical lifting unit can do linear motion along the vertical direction;
the cutting assembly is arranged at the front part of the conveying assembly;
the acquisition and analysis system is used for acquiring and analyzing displacement and speed of the translation pushing unit in linear motion along the cutting direction, displacement and speed of the vertical lifting unit in linear motion along the vertical direction, torque T output by the cutting assembly, cutting assembly rotation angle information beta, state images of leaf vegetables to be cut before, during and after cutting in the cutting process to obtain cutting power P and cutting force F of the cutting assembly x And the motion state and posture information of the leaf vegetables to be cut;
the control system is respectively connected with the feeding assembly, the cutting assembly and the conveying assembly.
In the above scheme, the feeding assembly further comprises a feeding assembly frame, a tray and a magnetic clamp;
the feeding assembly is arranged at the lower part of the front end of the conveying assembly through a feeding assembly rack; the translation pushing unit is installed on the feeding assembly rack, the vertical lifting unit is installed on the translation pushing unit, and the tray is installed on the vertical lifting unit; the leaf vegetables to be cut are arranged on the tray through the magnetic clamp; the control system is connected with the translation pushing unit and the vertical lifting unit.
Further, the magnetic clamp comprises a magnetic chassis and a clamping device;
the root of the leaf vegetable to be cut is fixed at the opening end of the magnetic chassis through the clamping device, and the mounting end of the magnetic chassis is mounted on the tray through magnetic force.
In the above scheme, the cutting assembly comprises a cutting driving unit, a stroke adjusting unit and a cutting unit;
the cutting driving unit is arranged on the conveying assembly and is connected with the power output end of the cutting driving unit through the stroke adjusting unit;
the control system is connected with the cutting driving unit.
Furthermore, a sliding groove is formed in the stroke adjusting unit;
the two ends of the cutting unit are respectively provided with a sliding rod and a sliding rail, the sliding rails are respectively installed on the two sides of the front portion of the conveying assembly, the sliding rods are connected with the cutting unit through connecting pieces, the sliding rods and the sliding rails are matched to form a linear pair, the connecting pieces are rotatably connected with one end of a connecting rod, and the other end of the connecting rod is rotatably connected with a sliding groove in the stroke adjusting unit.
Further, the connecting piece is connected with the cutting unit in a rotating mode and is screwed through the tightening unit.
In the above scheme, the conveying assembly comprises a conveying rack, a conveying unit drive and a conveying unit; the conveying unit is arranged on the conveying rack, is driven to be arranged on the conveying rack, and drives the conveying unit to convey the cut leaf vegetables to be cut backwards; the control system is in driving connection with the conveying unit.
In the scheme, the acquisition and analysis system comprises a translation pushing position detection device, a vertical lifting position detection device, a torque measurement unit, an angle measurement unit, a high-speed camera, an acquisition unit and an analysis unit;
translation propelling movement position detection device is used for gathering translation propelling movement unit along cutting direction rectilinear motion's displacement and speed and transmits extremely the acquisition unit, vertical lift position detection device is used for gathering vertical lift unit vertical direction rectilinear motion's displacement and speed and transmits extremely the acquisition unit, torque measurement unit is used for gathering the moment of torsion T of cutting assembly output and transmits extremely the acquisition unit, angle measurement unit is used for gathering cutting assembly turned angle information beta and transmits extremely the acquisition unit, high-speed camera install respectively in directly over the cutting assembly, left side and right side are used for gathering the cutting in-process wait to cut before, during the cutting, the state image after cutting of leafy dish and with information transmission extremely the acquisition unit. The acquisition unit transmits the acquired information to the analysis unit for analysis.
In the above scheme, the collection and analysis system calculates the cutting power P in the test process through a power calculation model, i.e. the following formula:
wherein:
in the formula: beta is the rotation angle information of the cutting driving unit at the moment t; beta is a 0 Is t 0 The cutting driving unit rotates at any time; t is a unit of max Is t 0 And T is the maximum value of the torque T output by the cutting driving unit.
In the above scheme, when the cutting unit is a reciprocating knife, the acquisition and analysis system calculates the cutting force F required in the test process through the following reciprocating knife cutting force calculation model x ：
In the formula: beta is the rotation angle information of the cutting driving unit at the moment t; t is the torque output by the cutting driving unit, and L is the distance between the rotation center of the stroke adjusting unit and the rotation connecting position of the stroke adjusting unit and the connecting rod.
In the above scheme, when the cutting unit is an annular cutter, the acquisition and analysis system calculates the cutting force F required in the test process through the following annular cutter cutting force calculation model x ：
In the formula: l is the distance between the rotation center of the stroke adjusting unit and the rotary connection position of the stroke adjusting unit and the connecting rod; and T is the torque output by the cutting driving unit.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a leaf vegetable cutting mechanical property testing device aiming at a test bed which is lack of cutting properties before, during and after leaf vegetable harvesting and group motion states at present, and provides a data basis for a harvesting parameter test for different varieties of leaf vegetables and harvesting in different planting modes, and for design and parameter setting of a leaf vegetable harvester. Aiming at the problem that the difference of leaf vegetable harvesting conditions in different areas is large due to the fact that the current leaf vegetable planting mode is not standardized yet, the invention provides the magnetic clamp for fixing and distributing the leaf vegetables based on spiral clamping and magnetic force arrangement, which has the characteristic of simple fixation and easy arrangement, and can meet the leaf vegetable distribution conditions of different leaf vegetable clamping and fixing and different planting agriculture. The invention provides a collection analysis system aiming at the problem that the cutting characteristics and the group motion state parameters before, during and after the leaf vegetable is cut are difficult to obtain. The invention can provide data basis for the design and parameter setting of the leaf vegetable harvester.
Drawings
Fig. 1 is a schematic view of the overall structure of an embodiment of the present invention.
FIG. 2 is a schematic view of a feed assembly according to an embodiment of the present invention.
Fig. 3 is a schematic view of a magnetic clamp for fixing leaf vegetables to be cut according to an embodiment of the present invention.
Fig. 4 is an enlarged schematic view of a connection part of the magnetic clamp and the leaf vegetables to be cut according to an embodiment of the invention.
Fig. 5 is a schematic structural view of a magnetic chuck according to an embodiment of the present invention.
FIG. 6 is a front perspective view of a cutting assembly according to one embodiment of the present invention.
FIG. 7 is a front view of a cutting assembly according to one embodiment of the present invention.
FIG. 8 is an enlarged view of a portion of one side of a cutting assembly in accordance with one embodiment of the present invention.
FIG. 9 is an enlarged view of another side of the cutting assembly, in accordance with one embodiment of the present invention.
FIG. 10 is a schematic view of a conveyor assembly according to an embodiment of the invention.
FIG. 11 is a schematic diagram of an acquisition analysis system according to an embodiment of the present invention.
FIG. 12 is a schematic diagram of the geometry of the cutting force calculation model of the collection and analysis system in accordance with one embodiment of the present invention.
In the figure: 1. a feed assembly; 1-1, a feeding assembly frame; 1-2, a translation pushing unit; 1-3, a vertical lifting unit; 1-4, a tray; 1-5, magnetic clamp; 1-5-1, a magnetic chassis; 1-5-2, a clamping device; 1-6, waiting to cut the leaf vegetables; 2. a cutting assembly; 2-1, a cutting driving unit; 2-2, a stroke adjusting unit; 2-3, connecting rod; 2-4, a slide rail; 2-5, a slide bar; 2-6, a tightening unit; 2-7, a cutting unit; 2-8, connecting pieces; 3. a delivery assembly; 3-1, conveying the rack; 3-2, driving a conveying unit; 3-3, a conveying unit; 4. a collection analysis system; 4-1, a translation pushing position detection device; 4-2, a vertical lifting position detection device; 4-3, a torque measuring unit; 4-4, an angle measuring unit; 4-5, a high-speed camera; 4-6, a collecting unit; 4-7, an analysis unit; 5. and (5) controlling the system.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and detailed description, but the scope of the present invention is not limited thereto.
Fig. 1 shows a preferred embodiment of the device for testing mechanical properties of cut leaf vegetables, which includes a feeding assembly 1, a cutting assembly 2, a conveying assembly 3, an acquisition and analysis system 4, and a control system 5. The feeding assembly 1 is arranged at the lower part of the front end of the conveying assembly 3; the cutting assembly 2 is arranged in front of the conveying assembly 3; the control system 5 is respectively connected with the feeding assembly 1, the cutting assembly 2 and the conveying assembly 3.
Fig. 2, fig. 3, fig. 4, and fig. 5 are schematic structural diagrams of the feeding assembly 1, and the feeding assembly 1 includes a feeding assembly rack 1-1, a translational pushing unit 1-2, a vertical lifting unit 1-3, a tray 1-4, and a magnetic clamp 1-5. The feeding assembly 1 is arranged at the lower part of the front end of the conveying rack 3-1 through the feeding assembly rack 1-1; the translational pushing unit 1-2 is connected to the feeding assembly rack 1-1, the vertical lifting unit 1-3 is mounted on the translational pushing unit 1-2, and the tray 1-4 is mounted on the vertical lifting unit 1-3; the leaf vegetables 1-6 to be cut are arranged on the tray 1-4 through the magnetic clamp 1-5. The control system is connected with the translation pushing unit 1-2 and the vertical lifting unit 1-3, and the speeds of the translation pushing unit 1-2 and the vertical lifting unit 1-3 can be adjusted. The translation pushing unit 1-2 and the vertical lifting unit 1-3 can be linear driving mechanisms such as an electric push rod, an electric oil cylinder and an electric air cylinder.
The translation pushing unit 1-2 can realize the installation and the indirect installation of the vertical lifting unit 1-3, the tray 1-4, the magnetic clamp 1-5 and the leaf vegetable 1-6 to be cut on the translation pushing unit along the cutting direction of the cutting unit 2-7, namely the leaf vegetable 1-6 to be cut can realize the linear motion along the cutting direction of the cutting unit 2-7; the vertical lifting unit 1-3 can realize the installation and the indirect installation of the tray 1-4, the magnetic clamp 1-5 and the leaf vegetable 1-6 on the vertical lifting unit, and then the height change of the leaf vegetable 1-6 to be cut relative to the cutting unit 2-7 can be realized. The relative feeding speed and height parameter change of the leaf vegetables 1-6 to be cut relative to the cutting unit 2-7 can be realized through the motion combination of the translation pushing unit 1-2 and the vertical lifting unit 1-3.
The magnetic clamp 1-5 comprises a magnetic chassis 1-5-1 and a clamping device 1-5-2. The root of the leaf vegetable 1-6 to be cut is fixed at the opening end of the magnetic chassis 1-5-1 through the clamping device 1-5-2, the installation end of the magnetic chassis 1-5-1 is installed on the tray 1-4 through magnetic force, and the number and the position of the leaf vegetable 1-6 to be cut can be flexibly adjusted according to different agricultural techniques in actual planting.
Fig. 6, fig. 7, fig. 8 and fig. 9 are schematic structural diagrams of the cutting assembly 2, and the cutting assembly 2 includes a cutting driving unit 2-1, a stroke adjusting unit 2-2, a connecting rod 2-3, a sliding rail 2-4, a sliding rod 2-5 and a cutting unit 2-7. The shell of the cutting driving unit 2-1 is arranged on the conveying rack 3-1, the power output end of the cutting driving unit 2-1 is connected with the stroke adjusting unit 2-2, and a sliding groove is formed in the stroke adjusting unit 2-2; the two sets of the sliding rods 2-5 are connected to two ends of the cutting unit 2-7, and the two sets of the sliding rails 2-4 are matched with the two sets of the sliding rods 2-5 to form a linear pair; the two sets of sliding rails 2-4 are fixedly connected to two sides of the front end 3-1 of the conveying rack, the sliding rods 2-5 are connected with the cutting units 2-7 through connecting pieces 2-8, the connecting pieces 2-8 are rotatably connected with one ends of the connecting rods 2-3, and the other ends of the connecting rods 2-3 are rotatably connected with sliding grooves in the stroke adjusting units 2-2. The control system 5 is connected with the cutting driving unit 2-1, and the speed of the cutting driving unit 2-1 is adjustable.
The cutting unit 2-7 can perform reciprocating linear motion along a linear pair formed by the sliding rail 2-4 and the sliding rod 2-5 through the stroke adjusting unit 2-2 and the connecting rod 2-3 according to power provided by the cutting driving unit 2-1, and the reciprocating speed and the stroke of the cutting unit 2-7 can be adjusted and changed by adjusting the rotating speed of the cutting driving unit 2-1 and the rotating connection position of the sliding chute on the stroke adjusting unit 2-2 and the connecting rod 2-3.
The cutting assembly 2 further comprises a fastening unit 2-6, and the cutting angle of the cutting unit 2-7 can be adjusted and is fixed through the fastening unit 2-6.
The cutting unit 2-7 is any suitable leaf vegetable harvesting and cutting device, such as a reciprocating knife or a circular knife.
Fig. 10 is a schematic structural diagram of the conveying assembly 3, and the conveying assembly 3 includes a conveying rack 3-1, a conveying unit drive 3-2, and a conveying unit 3-3. The conveying unit 3-3 is mounted on the conveying rack 3-1, the conveying unit drive 3-2 is mounted on the conveying rack 3-1, and the conveying unit drive 3-2 provides power to enable the conveying unit 3-3 to convey the cut leaf vegetables 1-6 to the rear part. The control system 5 is connected with the conveying unit drive 3-2, and the speed of the conveying unit drive 3-2 can be adjusted.
Fig. 11 and 12 are schematic diagrams illustrating the structure and principle of the acquisition and analysis system 4, wherein the acquisition and analysis system 4 comprises a translation pushing position detection device 4-1, a vertical lifting position detection device 4-2, a torque measurement unit 4-3, an angle measurement unit 4-4, a high-speed camera 4-5, an acquisition unit 4-6 and an analysis unit 4-7. The translation pushing position detection device 4-1 can detect displacement and speed of linear motion of the vertical lifting unit 1-3, the tray 1-4, the magnetic clamp 1-5 and the leaf dish to be cut 1-6 caused by the translation pushing unit 1-2 along the cutting direction of the cutting unit 2-7 and transmit the displacement and speed to the acquisition unit 4-6, the vertical lifting position detection device 4-2 can detect displacement and speed of linear motion of the tray 1-4, the magnetic clamp 1-5 and the leaf dish to be cut 1-6 caused by the vertical lifting unit 1-3 and transmit the displacement and speed to the acquisition unit 4-6, the torque measurement unit 4-3 can detect torque T output by the cutting driving unit 2-1 and transmit the torque T to the acquisition unit 4-6, the angle measurement unit 4-4 can detect rotation angle information beta of the cutting driving unit 2-1 and transmit the rotation angle information beta to the acquisition unit 4-6, and three groups of high-speed cameras 4-5 are respectively installed right above, left and right sides of the cutting assembly 2 to acquire information of the leaf dish to be cut before and after the leaf dish to be cut 1-6 in the cutting process and transmit the acquisition unit 4-6. The acquisition unit transmits the acquired information to the analysis unit 4-7 for analysis.
The analysis unit 4-7 calculates the cutting power P in the test process through the information received by the acquisition unit 4-6 through a power calculation model, namely the following formula:
wherein:
in the formula: the angle measuring unit 4-2 detects the rotation angle information of the cutting driving unit 2-1 at the time beta is t; beta is a 0 Is t 0 The angle measuring unit 4-2 detects the rotation angle information of the cutting driving unit 2-1 at any moment; t is max Is t 0 The torque measuring unit 4-3 measures the maximum value of the torque T output by the cutting driving unit 2-1 at the moment T;
the analysis unit 4-7 calculates the cutting force F required in the test process through the cutting force calculation model, namely the following formula according to the information received by the acquisition unit 4-6 x ：
In the formula: l is the distance between the rotation center of the stroke adjusting unit 2-2 and the rotary connection position of the stroke adjusting unit 2-2 and the connecting rod 2-3; t is the torque output by the cutting drive unit 2-1.
The above power calculation model and cutting force calculation model are suitable for the case where the cutting units 2-7 are reciprocating knives, and when the selected cutting unit 2-7 is a circular knife, the circular knife cutting force calculation model may be:
in the formula: l is the distance between the rotation center of the stroke adjusting unit 2-2 and the rotary connection position of the stroke adjusting unit 2-2 and the connecting rod 2-3; t is the torque output by the cutting drive unit 2-1.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. A testing device for mechanical characteristics of leaf vegetable cutting is characterized by comprising a feeding assembly (1), a cutting assembly (2), a conveying assembly (3), an acquisition and analysis system (4) and a control system (5);
the feeding assembly (1) is arranged at the lower part of the front end of the conveying assembly (3); the feeding assembly (1) comprises a translation pushing unit (1-2) and a vertical lifting unit (1-3), the vertical lifting unit (1-3) is located above the translation pushing unit (1-2), the vertical lifting unit (1-3) is used for placing leafy vegetables (1-6) to be cut, the translation pushing unit (1-2) can do linear motion along the cutting direction, and the vertical lifting unit (1-3) can do linear motion along the vertical direction;
the cutting assembly (2) is arranged in front of the conveying assembly (3); the cutting assembly (2) comprises a cutting driving unit (2-1), a stroke adjusting unit (2-2) and a cutting unit (2-7); the cutting driving unit (2-1) is installed on the conveying assembly (3), and the cutting unit (2-7) is connected with the power output end of the cutting driving unit (2-1) through the stroke adjusting unit (2-2); the control system (5) is connected with the cutting driving unit (2-1);
the acquisition and analysis system (4) is used for acquiring and analyzing displacement and speed of the translational pushing unit (1-2) in linear motion along the cutting direction, displacement and speed of the vertical lifting unit (1-3) in linear motion along the vertical direction, torque T output by the cutting assembly (2), rotation angle information beta of the cutting assembly (2) and state images of leaf vegetables (1-6) to be cut before, during and after cutting in the cutting process to obtain cutting power P and cutting force F of the cutting assembly (2) x And the motion state and the posture information of the leaf vegetables (1-6) to be cut;
the control system (5) is respectively connected with the feeding assembly (1), the cutting assembly (2) and the conveying assembly (3).
2. The leaf vegetable cutting mechanical property testing device according to claim 1, wherein the feeding assembly (1) further comprises a feeding assembly frame (1-1), a tray (1-4) and a magnetic clamp (1-5);
the feeding assembly (1) is arranged at the lower part of the front end of the conveying assembly (3) through a feeding assembly rack (1-1); the translation pushing unit (1-2) is installed on the feeding assembly rack (1-1), the vertical lifting unit (1-3) is installed on the translation pushing unit (1-2), and the tray (1-4) is installed on the vertical lifting unit (1-3); the leaf vegetables (1-6) to be cut are arranged on the tray (1-4) through the magnetic clamp (1-5); the control system (5) is connected with the translation pushing unit (1-2) and the vertical lifting unit (1-3).
3. The leafy vegetable cutting mechanical property testing device according to claim 2, wherein the magnetic clamp (1-5) comprises a magnetic chassis (1-5-1) and a clamping device (1-5-2);
the root of the leaf vegetable (1-6) to be cut is fixed at the opening end of the magnetic chassis (1-5-1) through the clamping device (1-5-2), and the installation end of the magnetic chassis (1-5-1) is installed on the tray (1-4) through magnetic force.
4. The leaf vegetable cutting mechanical property testing device according to claim 1, wherein a sliding groove is formed in the stroke adjusting unit (2-2);
two ends of the cutting unit (2-7) are respectively provided with a sliding rod (2-5) and a sliding rail (2-4), the sliding rails (2-4) are respectively installed on two sides of the front portion of the conveying assembly (3), the sliding rod (2-5) is connected with the cutting unit (2-7) through a connecting piece (2-8), the sliding rod (2-5) and the sliding rail (2-4) are matched to form a linear pair, the connecting piece (2-8) is rotatably connected with one end of a connecting rod (2-3), and the other end of the connecting rod (2-3) is rotatably connected with a sliding groove in the stroke adjusting unit (2-2).
5. Mechanical property testing device for leaf vegetable cutting according to claim 4, characterized in that the connecting piece (2-8) is rotatably connected with the cutting unit (2-7) and is screwed by the fastening unit (2-6).
6. The leaf vegetable cutting mechanical property testing device according to claim 1, wherein the collection and analysis system (4) comprises a translation pushing position detection device (4-1), a vertical lifting position detection device (4-2), a torque measurement unit (4-3), an angle measurement unit (4-4), a high-speed camera (4-5), a collection unit (4-6) and an analysis unit (4-7);
the device comprises a translation pushing position detection device (4-1), a vertical lifting position detection device (4-2), an angle measurement unit (4-4), a high-speed camera (4-5), a collecting unit (4-6), an analysis unit (4-6) and a transmission unit (4-6), wherein the translation pushing position detection device (4-1) is used for collecting displacement and speed of linear motion of the translation pushing unit (1-2) along the cutting direction and transmitting the displacement and speed to the collecting unit (4-6), the vertical lifting position detection device (4-2) is used for collecting displacement and speed of linear motion of the vertical lifting unit (1-3) along the vertical direction and transmitting the displacement and speed to the collecting unit (4-6), the torque measurement unit (4-3) is used for collecting torque T output by the cutting assembly (2) and transmitting the torque T to the collecting unit (4-6), the angle measurement unit (4-4) is used for collecting rotation angle information beta of the cutting assembly (2) and transmitting the torque T to the collecting unit (4-6), the high-speed camera (4-5) is respectively arranged right above the cutting assembly (2) and used for collecting state images of the leaf vegetables (1-6) before, during cutting and transmitting the information to the collecting unit (4-6), and transmitting the information to the collecting unit (4-6) and transmitting the analysis unit (4-6) for analyzing the information.
7. The leaf vegetable cutting mechanical property testing device according to claim 4, wherein the collection and analysis system (4) calculates the cutting power P in the testing process through a power calculation model, namely the following formula:
wherein:
in the formula: beta is the rotation angle information of the cutting driving unit (2-1) at the moment t; beta is a 0 Is t 0 The cutting driving unit (2-1) is rotated at any moment; t is max Is t 0 -T time the maximum value of the torque T output by the cutting drive unit (2-1).
8. Leaf vegetable cutting mechanical property testing device according to claim 4, characterized in that when the cutting units (2-7) are reciprocating knives, the collection and analysis system (4) calculates the cutting force F required in the testing process through the following reciprocating knife cutting force calculation model x ：
In the formula: beta is the rotation angle information of the cutting driving unit (2-1) at the moment t; t is the torque output by the cutting driving unit (2-1), and L is the distance between the rotation center of the stroke adjusting unit (2-2) and the rotation connecting position of the stroke adjusting unit (2-2) and the connecting rod (2-3).
9. The leaf vegetable cutting mechanical property testing device according to claim 4, wherein when the cutting units (2-7) are annular knives, the collection and analysis system (4) calculates the cutting force F required in the testing process through the following annular knife cutting force calculation model x ：
In the formula: l is the distance between the rotation center of the stroke adjusting unit (2-2) and the rotary connection position of the stroke adjusting unit (2-2) and the connecting rod (2-3); t is the torque output by the cutting driving unit (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011374032.XA CN112540020B (en) | 2020-11-30 | 2020-11-30 | Leaf class vegetables cutting mechanical properties testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011374032.XA CN112540020B (en) | 2020-11-30 | 2020-11-30 | Leaf class vegetables cutting mechanical properties testing arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112540020A CN112540020A (en) | 2021-03-23 |
| CN112540020B true CN112540020B (en) | 2023-03-21 |
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| CN203249854U (en) * | 2012-12-27 | 2013-10-23 | 江苏大学 | Straw cutting performance test device |
| CN104359698B (en) * | 2014-12-02 | 2017-04-12 | 福建农林大学 | Pennisetum hydridum stalk cutting test bed |
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| CN210005224U (en) * | 2019-06-04 | 2020-01-31 | 南京工程学院 | transverse stem and vine double-moving-blade cutting test device |
| CN111264171B (en) * | 2020-04-02 | 2024-08-20 | 山东省农业机械科学研究院 | Multifunctional reciprocating cutting test device for crop stalks |
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| CN111781000A (en) * | 2020-04-02 | 2020-10-16 | 山东省农业机械科学研究院 | Test device for conveying and cutting rhizomatic crop stalks |
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