Automatic monitoring and collecting system for leaf surface potential in crop seedling stage

Abstract

The utility model discloses an automatic monitoring and collecting system for leaf surface potential in a crop seedling stage. The crop seedling stage leaf surface potential automatic monitoring and acquisition system comprises a leaf surface potential detection device, a leaf surface potential acquisition device and a leaf surface potential gathering device, the leaf surface potential detection device comprises a detection frame, a detection platform and a shading assembly, and the detection frame is provided with a shading cover and a gooseneck type optical fiber; an electric signal acquisition probe is arranged on the detection platform, the shading assembly comprises a base and a shading plate, one end of the shading plate is connected with the base, and the shading plate is driven by the base to be switched back and forth between a first position and a second position; the potential acquisition device is used for collecting leaf surface electric signal information; and the leaf surface potential summarizing device is used for summarizing the collected leaf surface potential information. And plant mesophyll cells, guard cells and the like are induced to generate potential change with high reproducibility through instantaneous strong light stimulation, so that high-flux lossless acquisition of plant leaf surface potential is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of crop leaf surface potential collection, and particularly relates to an automatic monitoring and collection system for crop leaf surface potential at the seedling stage. Background Art

[0002] Plant electrical signaling is a mechanism used within plants to transmit and communicate information. When plants respond to external environmental stimuli, this information influences the plant's own bioelectrical activity. Changes in this activity then rapidly transmit this information to other plant tissues, enabling them to respond. Therefore, plant electrical signaling is a crucial component of plant cell communication and a key mechanism for plant adaptation and survival.

[0003] The technology for acquiring light-induced plant leaf surface potentials uses a weak, multi-source signal whose waveform is the result of the spatiotemporal superposition of the membrane potentials of a leaf population, making feature extraction extremely challenging. With the continuous advancement of deep learning technology, network models can automatically extract features from raw data, enabling better and faster solutions for feature extraction and classification of light-induced plant leaf surface potentials. This has promoted the application of plant electrical signals in agricultural engineering and provided a new approach and technical approach for the nation's agricultural intelligence and crop variety improvement efforts.

[0004] In the prior art, for example, the Chinese invention patent with publication number CN108508288A discloses a plant electrical signal detection device and method, which specifically discloses an insulating container, a first electrode, a second electrode, a conductive colloid, a signal amplifier and a data acquisition unit; the conductive colloid is attached to the upper surface and the lower surface of the insulating container, one end of the first electrode is arranged in the conductive colloid on the upper surface, and one end of the second electrode is arranged in the conductive colloid on the lower surface, and the other end of the first electrode and the other end of the second electrode both extend through the side of the insulating container to the outside of the insulating container and are both connected to the signal amplifier, and the signal amplifier is connected to the data acquisition unit. The electrical signals of the plant to be tested are detected without affecting the normal growth of the plant to be tested. Contact measurement is used during detection and no damage is caused to the plant to be tested. The overall material and experimental conditions are very low cost compared to other plant electrical signal measurement devices. However, when testing multiple samples, the entire process relies heavily on manual operations, the collection efficiency is low, and it cannot meet the huge data requirements of deep learning technology. In addition, the errors caused by human factors are superimposed in each experimental link, which will eventually cause serious interference to the stable acquisition of the surface potential of plant leaves. Summary of the Invention

[0005] Based on this, it is necessary to provide an automated monitoring and collection system for the leaf surface potential of crop seedlings, in order to address the problem that the entire process relies heavily on manual operation, the collection efficiency is low, and it cannot meet the huge data requirements of deep learning technology. The errors caused by human factors are superimposed in each experimental link, which will eventually cause serious interference to the stable acquisition of the surface potential of plant leaves.

[0006] In order to achieve the above purpose, the present invention adopts the following scheme:

[0007] A system for automatically monitoring and collecting leaf surface potential of crops in the seedling stage, comprising: a leaf surface potential detection device, a leaf surface potential collection device and a leaf surface potential aggregation device, wherein the leaf surface potential detection device comprises a detection frame, a detection platform and a light shielding component, wherein a light shielding cover and a gooseneck optical fiber are provided on the detection frame, wherein the light shielding cover covers the top of the detection frame, wherein one end of the gooseneck optical fiber is connected to a light source, and the other end passes through the light shield and extends into the detection frame, and is located above the light shielding component, and is used to irradiate light into the detection frame; the detection platform is arranged at the bottom of the detection frame, and a plurality of electrical signal collection probes are arranged on the detection platform, wherein each of the electrical signal collection probes is correspondingly provided with a leaf surface information collection box, and each of the electrical signal collection probes is divided into The light shielding plate is electrically connected to one of the leaf surface information collection boxes; the light shielding assembly includes a base and a plurality of light shielding plates, the base is rotatably arranged on the upper end surface of the detection platform, one end of the light shielding plate is connected to the base, the light shielding plate covers the top of the leaf surface information collection box when in the first position, and is located between two adjacent leaf surface information collection boxes when in the second position, and the light shielding plate switches back and forth between the first position and the second position under the drive of the base; the potential collection device is arranged on the outside of the detection frame, and its input end is connected to the output end of the electrical signal collection probe for collecting leaf surface electrical signal information; the input end of the leaf surface potential aggregation device is connected to the output end of the potential acquisition device for aggregating the collected leaf surface potential information.

[0008] Preferably, the detection platform includes a frame and a disc, one end of the frame is detachably connected to the bottom of the detection frame, and the other end is connected to the disc, and a through hole is provided at the center of the disc, the base is embedded in the through hole, and can rotate along the center of the through hole.

[0009] Preferably, a fixing bracket is provided at one end of the disc away from the light shielding plate, one side of the fixing bracket is connected to a driving motor, and the other end of the driving motor is connected to the base.

[0010] Preferably, the disc is provided with a plurality of card slots, which are evenly distributed around the through hole, and the card slots are used to place the leaf surface information collection box.

[0011] Preferably, a blackout cloth is detachably connected to the detection frame, and the blackout cloth surrounds the circumference of the detection frame and is adjacent to each other end to end, so as to prevent external natural light from entering the detection frame and causing interference.

[0012] Preferably, the leaf surface information acquisition box includes a leaf surface recording electrode and a box body, the box body is used to place and cultivate plants, the leaf surface recording electrode is covered on the top of the box body, and is electrically connected to the electrical signal acquisition probe.

[0013] Preferably, the leaf surface potential acquisition device includes a preamplifier and an electrical signal collector, the input end of the preamplifier is connected to the output end of the electrical signal acquisition probe, the output end of the preamplifier is connected to the input end of the electrical signal collector, and the output end of the electrical signal collector is connected to the input end of the leaf surface potential aggregation device.

[0014] Preferably, a halogen lamp is further included, which is connected to the gooseneck optical fiber, and an electronic timer is provided at the switch of the halogen lamp for intermittent cycle control of the switch of the halogen lamp.

[0015] The technical solution adopted in this application can achieve the following beneficial effects:

[0016] By setting a base and a light shield, and setting leaf surface information collection boxes corresponding to the number of light shields, the base drives the light shield to switch back and forth between the first position and the second position, so that the leaf surface information collection box is always in a flickering state, thereby inducing plant mesophyll cells, guard cells, etc. to produce highly reproducible potential changes through instantaneous strong light stimulation, thereby achieving high-throughput non-destructive acquisition of plant leaf surface potential; through automatic rotation of the light shield, the problem of the entire process relying heavily on manual operation, low collection efficiency, and inability to meet the huge data requirements of deep learning technology is solved; by electrically connecting the leaf surface information collection probe and the leaf surface information collection box, equipment detection is used to solve the problem of errors in detection data caused by human factors, and at the same time solve the problem of error superposition, which ultimately causes serious interference to the stable acquisition of plant leaf surface potential. By reserving a distance to allow plants to grow on their own, the problem of clamp operation and human contact with plants that easily lead to deviations in monitoring data is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall schematic diagram of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in the embodiments of this application.

[0018] Figure 2This is a front view of the detection platform and shading components of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in an embodiment of the present application.

[0019] Figure 3 This is a schematic diagram of the first position of the sunshade of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in an embodiment of the present application.

[0020] Figure 4 This is a top view of the first position of the sunshade of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in an embodiment of the present application.

[0021] Figure 5 This is a schematic diagram of the second position of the sunshade of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in an embodiment of the present application.

[0022] Figure 6 This is a top view of the second position of the sunshade of the automatic monitoring and collection system for leaf surface potential of crops in the seedling stage disclosed in an embodiment of the present application.

[0023] Among them: frame 1, signal acquisition probe 2, light shield 3, gooseneck optical fiber 4, electrical signal collector 5, leaf surface potential aggregation device 6, support frame 7, halogen lamp 8, preamplifier 9, light shield 10, base 11, leaf surface information acquisition box 12, detection frame 13. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0025] It should be noted that when a device is considered to be "connected" to another device, it can be directly connected to the other device or there may be an intermediate device. The terms "interior," "top," "upper," "lower," "upper," "lower," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] See also Figures 1 to 6, the present application provides an automatic monitoring and collection system for the leaf surface potential of crops in the seedling stage, comprising: a leaf surface potential detection device, a leaf surface potential collection device and a leaf surface potential aggregation device 6, the leaf surface potential detection device comprising a detection frame 13, a detection platform and a light shielding component, the detection frame 13 is provided with a light shield 3 and a gooseneck optical fiber 4, the light shield 3 covers the top of the detection frame 13, one end of the gooseneck optical fiber 4 is connected to the light source, and the other end passes through the light shield 3 and extends into the detection frame 13, and is located above the light shielding component, for irradiating light into the detection frame 13; the detection platform is arranged at the bottom of the detection frame 13, and a plurality of electrical signal collection probes 2 are arranged on the detection platform, each of the electrical signal collection probes 2 is correspondingly provided with a leaf surface information collection box 12, and each of the electrical signal collection probes 2 is divided into It is electrically connected to one of the leaf surface information acquisition boxes 12; the shading assembly includes a base 11 and a plurality of shading plates 10, the base 11 is rotatably arranged on the upper end surface of the detection platform, one end of the shading plate 10 is connected to the base 11, and the shading plate 10 covers the leaf surface information acquisition box 12 when in the first position, and is located between two adjacent leaf surface information acquisition boxes 12 when in the second position, and the shading plate 10 switches back and forth between the first position and the second position under the drive of the base 11; the potential acquisition device is arranged on the outside of the detection frame 13, and its input end is connected to the output end of the electrical signal acquisition probe 2 for collecting leaf surface electrical signal information; the input end of the leaf surface potential aggregation device 6 is connected to the output end of the potential acquisition device for aggregating the collected leaf surface potential information.

[0028] Specifically, the detection frame 13 adopts but is not limited to a regular box frame such as a cube, a rectangular parallelepiped, or a cylinder, and the surfaces of the detection frame 13 are all exposed. In the preferred embodiment, the detection frame 13 is a Faraday cage composed of a brass mesh and an iron frame, which reduces electromagnetic interference and has an exposed surface; a light shield 3 is covered on the upper surface, and the light shield 3 is made of a brass mesh (which can effectively shield static electricity); one end of the gooseneck optical fiber 4 passes through the light shield 3 and enters the detection frame 13, and is ten centimeters away from the detection platform set at the bottom of the detection frame 13, and the other end is connected to the light source, and the lower surface of the detection frame 13 is also sealed with a Faraday shielding mesh; a number of electrical signal acquisition probes 2 are set on the detection platform. Taking four as an example, the four electrical signal acquisition probes 2 are symmetrically and equidistantly set on the detection platform, and the same number of leaf surface information acquisition boxes 12 as the electrical signal acquisition probes 2 are set on the detection platform, each leaf surface information acquisition box 12 is connected to an electrical signal acquisition probe 2, and the position of the leaf surface information acquisition box 12 corresponds to the position of the electrical signal acquisition probe 2, and they are all symmetrically and equidistantly set on the detection platform.

[0029] The base 11 of the shading assembly includes a turntable and a connecting rod. The turntable is rotatably connected to the detection platform (rotatably connected by a rotating shaft motor, etc.), and the center of the turntable coincides with the center of the detection platform. The connecting rod is vertically arranged on the upper end surface of the turntable away from the detection platform, and one end of the shading plate 10 is connected to the end of the connecting rod away from the detection platform; the shading plate 10 rotates under the drive of the base 11, so that the shading plate 10 switches between a first position and a second position. The first position is that the shading plate 10 covers the leaf surface information acquisition box 12 (the vertical projection of the shading plate 10 coincides with the vertical projection of the leaf surface information acquisition box 12), and the second position is that the shading plate 10 is located between two adjacent leaf surface information acquisition boxes 12 (the vertical projection of the shading plate 10 is between the vertical projections of the two adjacent leaf surface information acquisition boxes 12, and there is no overlapping part).

[0030] The leaf surface potential acquisition device receives the electrical signals of the plant in the leaf surface information acquisition box 12 detected by the electrical signal acquisition probe 2 through an electrical connection, and sends them to the leaf surface potential aggregation device 6; the leaf surface potential aggregation device 6 includes a support frame 7 and a host computer, the support frame 7 is set on one side of the detection frame 13, and the host computer is set on the support frame 7, which is used to receive and aggregate the plant electrical signals emitted by the leaf surface potential acquisition device.

[0031] Furthermore, check the connection between the electric signal acquisition probe 2 and the leaf surface information acquisition box 12 to ensure that the device is operating normally; place the plant in the leaf surface information acquisition box 12 (set four leaf surface information acquisition boxes 12, and each of them contains a plant), and place the leaf surface information acquisition boxes 12 evenly and equidistantly on the detection platform, and directly below the light shielding plate 10; use an opaque Faraday shielding net to block the four sides of the detection frame 13 to prevent natural light from entering; leave a reserved distance between the plants in each leaf surface information acquisition box 12, and wait until the top of the plant is at the same level as the top of the leaf surface information acquisition box 12. After the parts are in contact, the light source is turned on to allow it to enter the detection frame 13 from the gooseneck optical fiber 4, and the base 11 is rotated to drive the light shielding plate 10 to continuously switch between the first position and the second position, so that the leaf surface information acquisition box 12 is always in a flickering state, thereby inducing plant mesophyll cells, guard cells, etc. to produce highly reproducible potential changes through instantaneous strong light stimulation, so that the electrical signal acquisition probe 2 detects the plant leaf surface in the leaf surface information acquisition box 12, and sends the detected electrical signal to the leaf surface potential acquisition device, and then the leaf surface potential acquisition device sends it to the host computer for summary.

[0032] This application adopts a technical solution of an automatic monitoring and collection system for the surface potential of crop leaves in the seedling stage to achieve the following beneficial effects:

[0033] By setting a base 11 and a light shielding plate 10, and setting leaf surface information collection boxes 12 corresponding to the number of light shielding plates 10, the base 11 drives the light shielding plates 10 to switch back and forth between the first position and the second position, so that the leaf surface information collection box 12 is always in a flickering state, thereby inducing plant mesophyll cells, guard cells, etc. to produce highly reproducible potential changes through instantaneous strong light stimulation, thereby achieving high-throughput non-destructive acquisition of plant leaf surface potential; through automatic rotation of the light shield, the problem that the entire process relies heavily on manual operation, the collection efficiency is low, and it cannot meet the huge data requirements of deep learning technology is solved; the leaf surface information collection probe is electrically connected to the leaf surface information collection box 12, and equipment detection is used to solve the problem of errors in detection data caused by human factors, and at the same time solve the problem of error superposition, which ultimately causes serious interference to the stable acquisition of plant leaf surface potential; by reserving a distance to allow plants to grow on their own, the problem of clamp operation and human contact with plants that easily lead to deviations in monitoring data is solved.

[0034] Based on the above scheme, the detection platform includes a frame 1 and a disc, one end of the frame 1 is detachably connected to the bottom of the detection frame 13, and the other end is connected to the disc, and a through hole is provided at the center of the disc, and the base 11 is embedded in the through hole and can rotate along the center of the through hole.

[0035] Specifically, the bottom of the frame 1 is detachably set on the bottom of the detection frame 13 by means of bolts, and the disc is connected to the end of the frame 1 away from the detection frame 13 by means of bolts. The diameter of the through hole in the center of the disc is not less than the outer diameter of the base 11, and the bottom of the base 11 is cylindrical and is provided with a retaining ring. The base 11 is supported on the through hole of the disc. The base 11 is rotated by the driving device to complete the switching of the light shielding plate 10 back and forth between the first position and the second position. The detachable connection of the frame 1 makes the carrying operation simpler and more convenient.

[0036] In the above solution, a fixing bracket is provided at one end of the disk away from the light shielding plate 10 , one side of the fixing bracket is connected to a driving motor, and the other end of the driving motor is connected to the base 11 .

[0037] Specifically, in order to achieve the purpose of automatic rotation of the base 11, a U-shaped fixing frame is set on the lower end surface of the disc, and the two ends of the fixing part are connected to the two sides of the through hole by bolts. The fixed end of the driving motor is set on the fixing part, and the shaft extension end is connected to the base 11. It is opened by the driving motor to realize the rotation of the base 11.

[0038] Furthermore, the disc is provided with a plurality of slots, which are evenly distributed around the circumference of the through-hole, and are used to place the leaf surface information collection box 12. The number of slots provided on the disc corresponds to the number of light shielding plates 10, and when the light shielding plates 10 are in the first position, the horizontal projection of the light shielding plates 10 coincides with the slots, and the diameter of the slots is the same as the diameter of the leaf surface information collection box 12. By placing the leaf surface information collection box 12 in the slots, the positioning of the leaf surface information collection box 12 is facilitated, ensuring that the leaf surface information collection box 12 is in a flickering state when the light shielding plates 10 switch between the first and second positions, thereby solving the problem of inaccurate placement of the leaf surface information collection box 12, which results in the light shielding plates 10 being unable to effectively shield the leaf surface information collection box 12.

[0039] In the above scheme, a blackout cloth is detachably connected to the detection frame 13. The blackout cloth surrounds the detection frame 13 end to end and is used to prevent external natural light from entering the detection frame 13 and causing interference. The blackout cloth is attached to the detection frame 13 by means of clips, bolts, etc., and is an opaque Faraday shield. When not conducting tests, the blackout cloth is removed and stored. When conducting tests, the leaf surface information acquisition box 12 is first placed on the circular disk of the detection frame 13, and the blackout cloth is then detachably connected to the detection frame 13 before the test is conducted. The blackout cloth prevents interference from external natural light during measurement.

[0040] Based on the above scheme, the leaf surface information acquisition box 12 includes leaf surface recording electrodes and a box body. The box body is used to house and cultivate plants. The leaf surface recording electrodes cover the top of the box body and are electrically connected to the electrical signal acquisition probe 2. Leaf surface recording electrodes are provided on both the upper and lower ends of the box body. The upper and lower ends of the plant contact the leaf surface recording electrodes on the upper and lower ends of the box body, respectively (the upper end serves as the recording electrode, and the lower end serves as the reference electrode). The electrical signal acquisition probe 2 is electrically connected to the leaf surface recording electrodes, thereby enabling research on plant leaf surface electrical signals by collecting electrical signal changes at the leaf surface recording electrodes.

[0041] Based on the above scheme, the leaf surface potential acquisition device includes a preamplifier 9 and an electrical signal collector 5. The input end of the preamplifier 9 is connected to the output end of the electrical signal acquisition probe 2, the output end of the preamplifier 9 is connected to the input end of the electrical signal collector 5, and the output end of the electrical signal collector 5 is connected to the input end of the leaf surface potential aggregation device 6.

[0042] The preamplifier 9 is used to amplify the audio (AUX, MIC) signal to the input range that the power amplifier can receive. The weak electrical signal detected by the leaf surface acquisition probe is amplified by the preamplifier 9 and collected by the electrical signal collector 5. Finally, it is summarized and displayed by the leaf surface potential summary device 6. By setting up the preamplifier 9, it is more convenient to receive weak electrical signals and facilitate subsequent related research.

[0043] The above solution further includes a halogen lamp 8, which is connected to the gooseneck optical fiber 4, and an electronic timer is provided at the switch of the halogen lamp 8 for intermittent cycle control of the switch of the halogen lamp 8.

[0044] The halogen lamp 8 is connected to the gooseneck optical fiber 4. After the halogen lamp 8 is turned on, the light enters the detection frame 13 along the gooseneck optical fiber 4. An electronic timer is set at the switch of the halogen lamp 8. The halogen lamp 8 is automatically turned on or off by customizing the time; for example, if the halogen lamp 8 is turned on for ten minutes each time, the electronic timer is set to ten minutes. During the ten minutes, the base 11 rotates to make the light shielding plate 10 switch cyclically between the first position and the second position, so that the leaf surface information collection box 12 is in a flickering state, and the irradiation is stopped after ten minutes, thereby ensuring that the lighting duration of each group of experiments is the same, and the operation is more convenient.

[0045] The above-described embodiments only express the way in which the equipment of the present application is arranged. The description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that a person skilled in the art can make a number of adjustments and improvements without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be based on the attached claims.

Claims

1. A system for automatically monitoring and collecting leaf surface potential of crops at the seedling stage, characterized in that: include: A leaf surface potential detection device includes a detection frame, a detection platform, and a light shielding assembly. The detection frame is provided with a light shield and a gooseneck optical fiber. The light shield covers the top of the detection frame. One end of the gooseneck optical fiber is connected to a light source, and the other end passes through the light shield and extends into the detection frame. It is located above the light shielding assembly and is used to irradiate light into the detection frame. The detection platform is provided at the bottom of the detection frame and is provided with a plurality of electrical signal acquisition probes. Each of the electrical signal acquisition probes is provided with a corresponding leaf surface information acquisition box, and each of the electrical signal acquisition probes is electrically connected to one of the leaf surface information acquisition boxes. The light shielding assembly includes a base and a plurality of light shielding plates. The base is rotatably provided on the upper end surface of the detection platform. One end of the light shielding plate is connected to the base. When in a first position, the light shielding plate covers directly above the leaf surface information acquisition box. When in a second position, the light shielding plate is located between two adjacent leaf surface information acquisition boxes. The light shielding plate switches back and forth between the first and second positions under the drive of the base. A leaf surface potential collection device, which is arranged outside the detection frame and has an input end connected to the output end of the electrical signal collection probe, for collecting leaf surface electrical signal information; as well as A leaf surface potential summarizing device, the input end of which is connected to the output end of the potential collecting device, is used to summarize the collected leaf surface potential information.

2. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 1, characterized in that: The detection platform includes a frame and a disc. One end of the frame is detachably connected to the bottom of the detection frame, and the other end is connected to the disc. A through hole is provided at the center of the disc. The base is embedded in the through hole and can rotate along the center of the through hole.

3. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 2, characterized in that: A fixing bracket is provided at one end of the circular disc away from the light shielding plate, one side of the fixing bracket is connected to a driving motor, and the other end of the driving motor is connected to the base.

4. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 2, characterized in that: The disc is provided with a plurality of card slots, which are evenly distributed around the circumference of the through hole, and the card slots are used to place the leaf surface information collection box.

5. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 1, characterized in that: The detection frame is detachably connected to a shading cloth, which surrounds the circumference of the detection frame and is adjacent to each other end to end, and is used to prevent external natural light from entering the detection frame and causing interference.

6. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 1, characterized in that: The leaf surface information acquisition box includes a leaf surface recording electrode and a box body. The box body is used to place and cultivate plants. The leaf surface recording electrode is covered on the top of the box body and is electrically connected to the electrical signal acquisition probe.

7. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 1, characterized in that: The leaf surface potential acquisition device includes a preamplifier and an electrical signal collector. The input end of the preamplifier is connected to the output end of the electrical signal acquisition probe, the output end of the preamplifier is connected to the input end of the electrical signal collector, and the output end of the electrical signal collector is connected to the input end of the leaf surface potential aggregation device.

8. The automatic monitoring and collection system for leaf surface potential of crops at seedling stage according to claim 1, characterized in that: It also includes a halogen lamp, which is connected to the gooseneck optical fiber, and an electronic timer is provided at the switch of the halogen lamp for intermittent cycle control of the switch of the halogen lamp.

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