CN112540020B - Leaf class vegetables cutting mechanical properties testing arrangement - Google Patents

Abstract

The invention provides a device for testing the mechanical characteristics of leafy vegetable cutting, which includes a feed assembly, a cutting assembly, a conveying assembly, an acquisition and analysis system, and a control system; The relative feed speed and height parameters of the leafy vegetables relative to the cutting unit are changed to realize the research on the cutting characteristics of the leafy vegetables to be cut at different harvesting speeds and cutting knife heights in the actual operation; the cutting unit is adjusted according to the power provided by the cutting drive unit through the stroke The unit performs cutting linear motion, and the cutting speed and stroke of the cutting unit can be adjusted by adjusting the cutting drive unit and the stroke adjustment unit to realize the research on the cutting characteristics of the cutting leaf vegetables with different cutting speeds and strokes of the cutting unit; through the acquisition and analysis system, calculate and test different settings The parameters change the cutting power and cutting force during the cutting process and the status of the leafy vegetables to be cut before, during and after cutting, providing a data basis for the design and parameter setting of the leafy vegetable harvester.

Description

A test device for cutting mechanical properties of leafy vegetables

technical field

The invention belongs to the field of agricultural machinery, in particular to a device for testing the mechanical properties of leaf vegetable cutting.

Background technique

Harvesting leafy vegetables is one of the most labor-intensive links in leafy vegetable production, and it is also the last link to ensure the appearance and quality of leafy vegetables. At present, there are mainly three cutting methods for harvesting leafy vegetables: belt knife, double-action reciprocating knife, and single-action reciprocating knife. Since the harvesting position of some leafy vegetables is relatively low from the harvesting ridge during the harvest period, the belt knife Compared with the double-action reciprocating cutter, it is not suitable for underground cutting, so the single-action reciprocating cutter has better performance for the leafy vegetables whose cutting position is lower than the harvesting ridge.

Due to the current lack of unified standards for leafy vegetable planting, the planting mode is relatively messy, and the planting density per unit planting area is very different. In addition, the harvesting and cutting states of different leafy vegetable varieties are quite different for different cutting parameters, resulting in uneven post-harvest quality. In addition, different planting methods and planting densities are different in different regions, so it is difficult for a single-performance leafy vegetable harvester to meet the harvesting needs of different varieties of leafy vegetables in different regions. Therefore, it is necessary to study the harvesting and cutting performance of different leafy vegetable varieties and different planting modes in order to Improve the harvest quality of leafy vegetable cutting.

Aiming at the above problems, scholars at home and abroad have carried out corresponding research. Chinese patent CN109085081A discloses a multifunctional reciprocating cutting test bench for crop stalks, which can perform cutting tests on different parts of crop stalks with different diameters and can adjust the feeding speed of the stalks, row spacing, plant spacing and the number of holes. Torque, cutting power consumption and cutting force are collected, but this test bench only focuses on the single factor of stalk cutting performance, does not consider the state change of the crop cutting process, and is not applicable to the research on the harvest characteristics of leafy vegetables; Chinese patent CN110108473A discloses a The horizontal vine double-moving knife cutting test device realizes the simulation of vertical cutting of crop stalks, but this test bench can only cut crops in a static state, and cannot obtain the cutting characteristics and the relationship between the cutting characteristics before, during, and It is difficult to imitate the distribution of leafy vegetables in the actual harvest process.

Contents of the invention

Aiming at the above technical problems, the present invention proposes a test device for the mechanical characteristics of leafy vegetables cutting, which realizes the relative feed speed and height parameter changes of the leafy vegetables to be cut relative to the cutting unit through the combination of the movement of the translational pushing unit and the vertical lifting unit In order to realize the research on the cutting characteristics of different harvesting speeds and cutting knife heights of the harvester in actual operation; the cutting unit performs cutting linear motion through the stroke adjustment unit according to the power provided by the cutting drive unit, and the cutting speed and stroke of the cutting unit can be adjusted. By adjusting the cutting drive unit and the stroke adjustment unit to realize the cutting characteristics of different cutting speeds and strokes of the cutting unit; through the acquisition and analysis system to calculate and test the impact of different setting parameters on the cutting power and cutting force during the cutting process and the leafy vegetables to be cut The state changes before, during and after cutting provide a data basis for the design and parameter setting of the leaf vegetable harvester.

The technical solution of the present invention is: a device for testing the mechanical properties of leaf vegetable cutting, including a feed assembly, a cutting assembly, a conveying assembly, an acquisition and analysis system, and a control system;

The feed assembly is installed on the lower part of the front end of the conveying assembly; the feed assembly includes a translation push unit and a vertical lift unit, the vertical lift unit is located above the translation push unit, and the vertical lift unit is used for Place the leafy vegetables to be cut, the translation push unit can make linear motion along the cutting direction, and the vertical lifting unit can make linear motion in the vertical direction;

The cutting assembly is installed at the front of the conveying assembly;

The collection and analysis system is used to collect the displacement and velocity of the linear movement of the translation push unit along the cutting direction, the displacement and velocity of the linear movement of the vertical lifting unit in the vertical direction, the torque T output by the cutting assembly, and the rotation angle information β of the cutting assembly . During the cutting process, the state images of the leafy vegetables to be cut before, during and after cutting are analyzed, and the cutting power P, cutting force F _x of the cutting assembly, and the motion state and posture information of the leafy vegetables to be cut are obtained;

The control system is respectively connected with the feeding assembly, the cutting assembly and the conveying assembly.

In the above solution, the feed assembly also includes a feed assembly frame, a tray and a magnetic clamp;

The feed assembly is installed on the lower part of the front end of the conveying assembly through the feed assembly frame; the translation push unit is installed on the feed assembly frame, and the vertical lifting unit is installed on the translation push unit , the tray is installed on the vertical lifting unit; the leafy vegetables to be cut are installed 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 includes a magnetic chassis and a clamping device;

The root of the leafy vegetable to be cut is fixed to the opening end of the magnetic chassis through the clamping device, and the mounting end of the magnetic chassis is magnetically mounted on the tray.

In the above solution, the cutting assembly includes a cutting drive unit, a stroke adjustment unit and a cutting unit;

The cutting drive unit is installed on the conveying assembly, and the cutting unit is connected to the power output end of the cutting drive unit through the stroke adjustment unit;

The control system is connected to the cutting drive unit.

Further, a chute is opened on the stroke adjustment unit;

The two ends of the cutting unit are respectively provided with sliding rods and sliding rails, and the sliding rails are respectively installed on both sides of the front of the conveying assembly. The sliding rods and the cutting unit are connected by connecting pieces, and the sliding rods and the sliding rails cooperate to form a straight line. Auxiliary, the connecting piece is rotatably connected with one end of the connecting rod, and the other end of the connecting rod is rotatably connected with the chute on the stroke adjustment unit.

Further, the connecting piece is rotatably connected with the cutting unit, and is tightened by the tightening unit.

In the above solution, the conveying assembly includes a conveying frame, a conveying unit drive and a conveying unit; the conveying unit is mounted on the conveying frame, the conveying unit is driven and mounted on the conveying frame, and the The conveying unit drives the conveying unit to convey the cut leafy vegetables backward; the control system is connected with the conveying unit.

In the above solution, the acquisition and analysis system includes a translation push position detection device, a vertical lift position detection device, a torque measurement unit, an angle measurement unit, a high-speed camera, an acquisition unit and an analysis unit;

The translation push position detection device is used to collect the displacement and velocity of the translation push unit moving linearly along the cutting direction and transmit it to the collection unit, and the vertical lift position detection device is used to collect the vertical linear movement of the vertical lift unit The displacement and speed of the cutting assembly are transmitted to the collection unit, the torque measurement unit is used to collect the output torque T of the cutting assembly and transmitted to the collection unit, and the angle measurement unit is used to collect the rotation angle information β of the cutting assembly and transmitted to the acquisition unit, the high-speed cameras are respectively installed directly above, on the left side and on the right side of the cutting assembly for collecting the states of the leafy vegetables to be cut before, during and after cutting during the cutting process image and transmit information to the acquisition unit. The collection unit transmits the collected information to the analysis unit for analysis.

In the above scheme, the acquisition and analysis system calculates the cutting power P during the test through the power calculation model, that is, the following formula:

in:

In the formula: β is the rotation angle information of the cutting drive unit at time t; _β0 is the rotation angle information of the cutting drive unit at time _t0 ; _Tmax is the maximum torque T output by the cutting drive unit at time _t0 ～t value.

In the above solution, when the cutting unit is a reciprocating knife, the acquisition and analysis system calculates the cutting force F _x required during the test through the following reciprocating knife cutting force calculation model:

In the formula: β is the rotation angle information of the cutting drive unit at time t; T is the torque output by the cutting drive unit, and L is the rotational connection between the rotation center of the stroke adjustment unit and the stroke adjustment unit and the connecting rod distance between locations.

In the above solution, when the cutting unit is a circular knife, the acquisition and analysis system calculates the cutting force F _x required during the test through the following circular knife cutting force calculation model:

In the formula: L is the distance between the rotation center of the stroke adjustment unit and the rotational connection position of the stroke adjustment unit and the connecting rod; T is the torque output by the cutting drive unit.

Compared with the prior art, the beneficial effects of the present invention are: the present invention provides a cutting mechanism for leafy vegetables aiming at the lack of cutting characteristics and group movement state of leafy vegetables before, during and after harvesting. The characteristic test device is used for testing the harvesting parameters of different varieties of leafy vegetables and different planting modes, and provides a data basis for the design and parameter setting of leafy vegetable harvesters. The invention provides a magnetic clamp for fixing and distributing leaf vegetables based on screw clamping and magnetic force arrangement, which has the advantages of simple fixing and easy arrangement, in view of the fact that the current planting mode of leaf vegetables has not yet formed a standard and the harvesting conditions of leaf vegetables in different regions are quite different. Features, can meet the clamping and fixing of different leaf vegetables and the distribution of leaf vegetables in different planting agronomy. The present invention aims at the problem that it is difficult to obtain the cutting characteristics and group motion state parameters of leafy vegetables before, during, and after cutting, and provides a collection and analysis system, which detects the cutting of leafy vegetables through a torque measurement unit, an angle measurement unit, and a high-speed camera. During the process, the torque, angle, and the movement state of the leaf vegetable group after cutting before and during cutting are calculated and analyzed through the corresponding calculation model. The invention can provide a data basis for the design and parameter setting of the leaf vegetable harvester.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a feed assembly according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of fixing the leafy vegetables to be cut by a magnetic clamp according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view of the connection between the magnetic clamp and the leafy vegetables to be cut according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a magnetic clamp according to an embodiment of the present invention.

Fig. 6 is an orthographic view of the cutting assembly according to one embodiment of the present invention.

Fig. 7 is a front view of a cutting assembly according to an embodiment of the present invention.

Fig. 8 is a partially enlarged view of one side of the cutting assembly according to an embodiment of the present invention.

Fig. 9 is a partially enlarged view of another side of the cutting assembly according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a conveying assembly according to an embodiment of the present invention.

Fig. 11 is a schematic diagram of an acquisition and analysis system according to an embodiment of the present invention.

Fig. 12 is a schematic diagram of geometric dimensions of the cutting force calculation model of the acquisition and analysis system according to an embodiment of the present invention.

In the figure: 1, feed assembly; 1-1, feed assembly frame; 1-2, translation push unit; 1-3, vertical lift unit; 1-4, pallet; 1-5, magnetic fixture ;1-5-1, magnetic chassis; 1-5-2, clamping device; 1-6, leafy vegetables to be cut; 2, cutting assembly; 2-1, cutting drive unit; 2-2, stroke adjustment unit ;2-3, connecting rod; 2-4, slide rail; 2-5, slide rod; 2-6, tightening unit; 2-7, cutting unit; 2-8, connector; 3, conveying assembly; 3-1. Conveyor rack; 3-2. Conveyor unit drive; 3-3. Conveyor unit; 4. Acquisition and analysis system; 4-1. Translation push position detection device; 4-2. Vertical lift position detection device; 4-3. Torque measurement unit; 4-4. Angle measurement unit; 4-5. High-speed camera; 4-6. Acquisition unit; 4-7. Analysis unit; 5. Control system.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Figure 1 shows a preferred embodiment of the test device for cutting mechanical properties of leafy vegetables. The test device for mechanical properties of leafy vegetables includes a feed assembly 1, a cutting assembly 2, and a delivery assembly 3. , Acquisition and analysis system 4, control system 5. The feeding assembly 1 is installed at the lower front end of the conveying assembly 3; the cutting assembly 2 is installed at the 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 are connected.

Fig. 2, Fig. 3, Fig. 4, and Fig. 5 are schematic diagrams of the structure of the feed assembly 1. The feed assembly 1 includes a feed assembly frame 1-1, a translation push unit 1-2, a vertical Straight Lift Unit 1-3, Tray 1-4 and Magnetic Clamp 1-5. The feed assembly 1 is installed on the lower front end of the conveying frame 3-1 through the feed assembly frame 1-1; the translation pushing unit 1-2 is connected to the feed assembly frame 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 leaves to be cut The dishes 1-6 are mounted on the tray 1-4 by the magnetic clamps 1-5. The control system is connected with the translation pushing unit 1-2 and the vertical lifting unit 1-3, and the speed 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 drive mechanisms such as electric push rods, electric cylinders, electric cylinders, etc.

The translation pushing unit 1-2 can be installed and indirectly installed on the vertical lifting unit 1-3, the tray 1-4, the magnetic clamp 1-5, the leafy vegetables to be cut 1-6 along the cutting unit 2-7 Linear movement in the cutting direction can realize the linear movement of the leafy vegetables 1-6 to be cut along the cutting direction of the cutting unit 2-7; the vertical lifting unit 1-3 can be installed and indirectly installed on it The vertical linear movement of the tray 1-4, the magnetic clamp 1-5, and the leafy vegetables to be cut 1-6 can realize the height change of the leafy vegetables to be cut 1-6 relative to the cutting unit 2-7. The relative feed speed and height parameter change of the leafy vegetables to be cut 1-6 relative to the cutting unit 2-7 can be realized through the movement combination of the translation pushing unit 1-2 and the vertical lifting unit 1-3.

The magnetic clamp 1-5 includes a magnetic chassis 1-5-1 and a clamping device 1-5-2. The root of the leafy vegetable 1-6 to be cut is fixed to the open 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 magnetically installed On the tray 1-4, the quantity and position of the leafy vegetables 1-6 to be cut can be flexibly adjusted according to different agronomy in actual planting.

Fig. 6, Fig. 7, Fig. 8 and Fig. 9 are schematic diagrams showing the structure of the cutting assembly 2. The cutting assembly 2 includes a cutting drive unit 2-1, a stroke adjustment unit 2-2, a connecting rod 2-3, Slide rail 2-4, slide bar 2-5 and cutting unit 2-7. The casing of the cutting drive unit 2-1 is installed on the conveying frame 3-1, the power output end of the cutting drive unit 2-1 is connected to the stroke adjustment unit 2-2, and the stroke adjustment unit 2- 2 is provided with a chute; two sets of the sliding rods 2-5 are connected to both ends of the cutting unit 2-7, and the two sets of the sliding rails 2-4 cooperate with the two sets of the sliding rods 2-5 to form a straight line pair; two sets of slide rails 2-4 are fixedly connected to both sides of the front end 3-1 of the conveyor frame, and the slide bar 2-5 is connected to the cutting unit 2-7 through a connecting piece 2-8, and the connecting piece 2 -8 is rotatably connected with one end of the connecting rod 2-3, and the other end of the connecting rod 2-3 is rotatably connected with the chute on the stroke adjustment unit 2-2. The control system 5 is connected with the cutting drive unit 2-1, and the speed of the cutting drive unit 2-1 can be adjusted.

The cutting unit 2-7 can pass the stroke adjustment unit 2-2 and the connecting rod 2-3 along the sliding rail 2-4 and the sliding rod according to the power provided by the cutting driving unit 2-1. The linear pair composed of 2-5 performs reciprocating linear motion, and the reciprocating speed and stroke of the cutting unit 2-7 can be adjusted by adjusting the speed of the cutting drive unit 2-1 and the upper chute of the stroke adjustment unit 2-2 and The rotational connection position of the connecting rod 2-3 is adjusted to vary.

The cutting assembly 2 also includes a tightening unit 2-6, the cutting angle of the cutting unit 2-7 can be adjusted and the angle is fixed by the tightening unit 2-6.

The cutting unit 2-7 is any cutting device suitable for harvesting leafy vegetables, such as a reciprocating knife or a circular knife.

Fig. 10 is a schematic structural diagram of the conveying assembly 3, which includes a conveying frame 3-1, a conveying unit drive 3-2 and a conveying unit 3-3. The conveying unit 3-3 is mounted on the conveying frame 3-1, the conveying unit drive 3-2 is mounted on the conveying frame 3-1, and the conveying unit drive 3-2 provides power for The conveying unit 3-3 conveys the cut leafy vegetables 1-6 to the rear. 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 Fig. 12 are schematic diagrams showing the structure and principle of the collection and analysis system 4. The collection and analysis system 4 includes a translation push position detection device 4-1, a vertical lifting position detection device 4-2, and a torque measurement unit 4- 3. Angle measurement unit 4-4, high-speed camera 4-5, acquisition unit 4-6 and analysis unit 4-7. The translation push position detection device 4-1 can detect the vertical lifting unit 1-3, the tray 1-4, the magnetic clamp 1-5, and the leafy vegetables to be cut 1-6 caused by the translation push unit 1-2. The displacement and velocity of the linear movement along the cutting direction of the cutting unit 2-7 are transmitted to the acquisition unit 4-6, and the vertical lifting position detection device 4-2 can detect the vertical lifting unit 1-3 so that The displacement and speed of the vertical linear motion of the tray 1-4, the magnetic clamp 1-5, and the leafy vegetables to be cut 1-6 are transmitted to the acquisition unit 4-6, and the torque measurement unit 4-3 can Detect the torque T output by the cutting drive unit 2-1 and transmit it to the acquisition unit 4-6, the angle measurement unit 4-4 can detect the rotation angle information β of the cutting drive unit 2-1 and transmit it to the The collection unit 4-6, three groups of the high-speed cameras 4-5 are respectively installed on the top, left and right sides of the cutting assembly 2 to collect the pre-cutting of the leafy vegetables 1-6 to be cut during the cutting process. , in-cutting and post-cutting states and transmit the information to the collection unit 4-6. The collection unit transmits the collected 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 power calculation model through the information received by the acquisition unit 4-6, that is, the following formula:

in:

In the formula: β is the angle measurement unit 4-2 detecting the rotation angle information of the cutting drive unit 2-1 at time t; _β0 is the angle measuring unit 4-2 detecting the cutting drive unit 2-1 at time _t0 . 1 rotation angle information; T _max is the maximum value of the torque T output by the cutting drive unit 2-1 measured by the torque measuring unit 4-3 at time t ₀ to t;

The analysis unit 4-7 calculates the cutting force F _x required in the test process through the cutting force calculation model through the information received by the acquisition unit 4-6, that is, the following formula:

In the formula: L is the distance between the rotation center of the stroke adjustment unit 2-2 and the rotational connection position between the stroke adjustment unit 2-2 and the connecting rod 2-3; T is the cutting drive unit 2- 1 output torque.

The above power calculation model and cutting force calculation model are applicable to the case where the cutting unit 2-7 is a reciprocating knife. When the selected cutting unit 2-7 is a ring knife, the cutting force calculation model of the ring knife can be:

In the formula: L is the distance between the rotation center of the stroke adjustment unit 2-2 and the rotational connection position between the stroke adjustment unit 2-2 and the connecting rod 2-3; T is the cutting drive unit 2- 1 output torque.

The series of detailed descriptions listed above are only specific descriptions for feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiment or All changes should be included within the protection scope of the present invention.

Claims (9)

1. A leaf vegetable cutting mechanical characteristic testing device is characterized in that, comprises feed assembly (1), cutting assembly (2), delivery assembly (3), collection and analysis system (4) and control system ( 5); The feeding assembly (1) is installed at the lower part of the front end of the conveying assembly (3); the feeding assembly (1) includes a translation pushing unit (1-2) and a vertical lifting unit (1-3). The vertical lifting unit (1-3) is positioned on the top of the translation pushing unit (1-2), the vertical lifting unit (1-3) is used to place the leafy vegetables (1-6) to be cut, and the translation pushing unit (1 -2) It can move linearly along the cutting direction, and the vertical lifting unit (1-3) can move linearly in the vertical direction; The cutting assembly (2) is installed on the front of the conveying assembly (3); the cutting assembly (2) includes a cutting drive unit (2-1), a stroke adjustment unit (2-2) and a cutting unit (2-7); the cutting drive unit (2-1) is installed on the conveying assembly (3), and the cutting unit (2-7) communicates with the cutting unit through the stroke adjustment unit (2-2) The drive unit (2-1) is connected to the power output end; the control system (5) is connected to the cutting drive unit (2-1); The collection and analysis system (4) is used to collect the displacement and speed of the linear motion of the translation pushing unit (1-2) along the cutting direction, the displacement and speed of the vertical linear motion of the vertical lifting unit (1-3), and the total cutting speed. The torque T output by (2), the rotation angle information β of the cutting assembly (2), and the state images of the leafy vegetables to be cut (1-6) before, during and after cutting during the cutting process are analyzed and obtained The cutting power P, cutting force F _x of the cutting assembly (2), and the motion state and posture information of the leafy vegetables (1-6) to be cut; The control system (5) is respectively connected with the feeding assembly (1), cutting assembly (2) and conveying assembly (3). 2. The device for testing the mechanical properties of leafy vegetable cutting according to claim 1, characterized in that, the feed assembly (1) also includes a feed assembly frame (1-1), a tray (1-4) ) and magnetic clamps (1-5); The feeding assembly (1) is installed on the lower front end of the conveying assembly (3) through the feeding assembly frame (1-1); the translation pushing unit (1-2) is installed on the feeding assembly On the frame (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 leafy vegetables to be cut (1-6) are installed on the pallet (1-4) through the magnetic clamp (1-5); the control system (5) and the translation push unit ( 1-2) is connected with the vertical lifting unit (1-3). 3. The leaf vegetable cutting mechanical characteristic test device according to claim 2, characterized in that, the magnetic clamp (1-5) comprises a magnetic chassis (1-5-1) and a clamping device (1-5- 2); The root of the leafy vegetable (1-6) to be cut is fixed to the open end of the magnetic chassis (1-5-1) through the clamping device (1-5-2), and the magnetic chassis (1-5-1) 1) The mounting end is magnetically mounted on the pallet (1-4). 4. The device for testing the mechanical properties of leafy vegetable cutting according to claim 1, wherein a chute is provided on the stroke adjustment unit (2-2); Both ends of the cutting unit (2-7) are respectively provided with a slide bar (2-5) and a slide rail (2-4), and the slide rail (2-4) is respectively installed in front of the conveying assembly (3) On both sides of the part, the sliding rod (2-5) is connected with the cutting unit (2-7) through the connecting piece (2-8), and the sliding rod (2-5) and the sliding rail (2-4) cooperate to form a linear pair, The connecting piece (2-8) is rotatably connected to one end of the connecting rod (2-3), and the other end of the connecting rod (2-3) is rotatably connected to the chute on the stroke adjustment unit (2-2). 5. The device for testing the mechanical characteristics of leafy vegetable cutting according to claim 4, characterized in that, the connecting piece (2-8) is rotationally connected with the cutting unit (2-7), and is passed through the tightening unit (2-7). 6) Tighten. 6. The leaf vegetable cutting mechanical characteristic testing device according to claim 1, characterized in that, the collection and analysis system (4) comprises a translation pushing position detection device (4-1), a vertical lifting position detection device (4 -2), torque measurement unit (4-3), angle measurement unit (4-4), high-speed camera (4-5), acquisition unit (4-6) and analysis unit (4-7); The translation push position detection device (4-1) is used to collect the displacement and velocity of the translation push unit (1-2) linearly moving along the cutting direction and transmit it to the collection unit (4-6), and the vertical lift The position detection device (4-2) is used to collect the displacement and speed of the vertical linear motion of the vertical lifting unit (1-3) and transmit it to the collection unit (4-6), and the torque measurement unit (4- 3) Used to collect the torque T output by the cutting assembly (2) and transmit it to the collection unit (4-6), and the angle measurement unit (4-4) is used to collect the rotation angle information of the cutting assembly (2) β and transmitted to the acquisition unit (4-6), the high-speed camera (4-5) is respectively installed on the top, left and right sides of the cutting assembly (2) to collect the State images before, during and after cutting leaf vegetables (1-6) to be cut and information is transmitted to the collection unit (4-6), and the collection unit (4-6) collects the collected information Transfer to the analysis unit (4-7) for analysis. 7. Leafy vegetable cutting mechanical characteristic testing device according to claim 4, is characterized in that, described acquisition and analysis system (4) calculates cutting power P in the testing process by power calculation model namely following formula:

in:

In the formula: β is the rotation angle information of the cutting drive unit (2-1) at time t; _β0 is the rotation angle information of the cutting drive unit (2-1) at time _t0 ; _Tmax is the rotation angle information at time _t0 ～t The maximum value of the torque T output by the cutting drive unit (2-1). 8. The leaf vegetable cutting mechanical characteristic test device according to claim 4, wherein when the cutting unit (2-7) is a reciprocating knife, the collection and analysis system (4) cuts by the following reciprocating knife The force calculation model calculates the cutting force F _x required during the test:

In the formula: β is the rotation angle information of the cutting drive unit (2-1) at time t; T is the torque output by the cutting drive unit (2-1), and L is the rotation of the stroke adjustment unit (2-2) The distance between the center and the rotational connection position of the stroke adjustment unit (2-2) and the connecting rod (2-3). 9. The leaf vegetable cutting mechanical characteristic test device according to claim 4, wherein when the cutting unit (2-7) is a ring knife, the collection and analysis system (4) cuts by the following ring knife The force calculation model calculates the cutting force F _x required during the test:

In the formula: L is the distance between the rotation center of the stroke adjustment unit (2-2) and the rotational connection position between the stroke adjustment unit (2-2) and the connecting rod (2-3); T is the Describe the output torque of the cutting drive unit (2-1).

Images