Substrate salinity concentration detecting and adjusting device for tobacco seedling raising
By using a probe that detects salt concentration and a device that controls water spray to reduce salt during the tobacco seedling cultivation process, the problem of excessive salt concentration during the seedling cultivation process is solved, efficient and precise salt control is achieved, and the quality of tobacco leaves is improved.
Patent Information
- Application Number
- CN202422027819.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The high matrix salt concentration during the seedling cultivation process leads to excessive water loss of tobacco seedlings, which cannot effectively control salt, affecting the quality of tobacco leaves.
A device including a detection mechanism, a spray adjustment mechanism and a controller is designed to detect the matrix salt concentration through a salt determination probe, and to control the spray adjustment mechanism to spray water to reduce salt through a controller.
Real-time detection and adjustment of matrix salt concentration is achieved, the salt control accuracy and efficiency of tobacco seedlings are improved, and the cumbersomeness of manual operation is reduced.
Smart Images
Figure CN222897761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tobacco seedling raising, in particular to a device for detecting and adjusting the salt concentration of a substrate for tobacco seedling raising. Background Art
[0002] The toxic effect of salt is mainly the osmotic stress caused by plant water deficit and the toxicity of excessive Na + to important biochemical processes. During the seedling raising process, tobacco seedlings absorb nutrients from the nutrient solution, and the nutrient solution also remains in the substrate. After evaporation, salts accumulate on the surface of the substrate. When the salts are excessive, salt damage will occur. The salt content of the soil for producing better quality tobacco leaves must be below 0.1%, and the salt content of the soil for producing high-quality tobacco leaves must be below 0.05%. During the seedling raising process, the salt content of the substrate also needs to be strictly controlled. According to the current standard, the salt content needs to be kept below 0.6%.
[0003] Too high salt concentration on the surface of the seedling raising substrate will not only cause the tobacco seeds not to germinate, but also cause the tobacco seedlings to lose too much water, resulting in a decrease in the relative water content of the leaves and an increase in the relative conductivity, making the tobacco seedlings weak and unable to grow into strong seedlings. The detection of the existing seedling raising substrate is often carried out manually, and then the salt content on the surface of the seedling raising tray is adjusted by adding water according to the results of the manual measurement. However, the detection accuracy of the manual adjustment method is difficult to be controlled and identified in real time, and the operation is cumbersome. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem that excessive salt concentration during the seedling raising process will cause excessive water loss and toxicity to the tobacco seedlings. A device for detecting and adjusting the salt concentration of a substrate for tobacco seedling raising is provided, which can timely detect the salt concentration of the substrate through the salt measurement probe of the detection mechanism and control the spray adjustment mechanism by the controller to spray water on the surface layer of the substrate to achieve the technical effect of reducing salt. The main idea is as follows:
[0005] A device for detecting and adjusting the salt concentration of the substrate for tobacco seedling raising, comprising a detection mechanism, a spray adjustment mechanism and a controller. The detection mechanism includes a salt content determination probe for detecting the salt concentration of the substrate. The spray adjustment mechanism includes a control water pump for controlling the spray adjustment mechanism to achieve the spraying function. The salt content determination probe and the control water pump are electrically connected through the controller. The salt content determination probe includes a probe housing, a moisture sensor and an electrode detection component. The moisture sensor and the electrode detection component are installed in the internal cavity of the probe housing and are electrically connected to the controller. In this solution, the detection mechanism is set to detect the salt concentration on the surface layer of the tobacco seedling raising substrate. Under the action of the controller, the detection mechanism and the spray adjustment mechanism are interlocked. The salt content determination probe can send the detected salt information to the controller without manual measurement. The moisture content of the substrate is measured by the moisture sensor, and the conductivity of the substrate is measured by the electrode detection component. The moisture sensor and the electrode detection component are electrically connected to the controller. According to the calibration formula of conductivity and salt content, it is converted into salt content and combined with the moisture content of the substrate to calculate the actual salt content of the substrate. The controller receives the salt concentration signal. When the salt content determination probe of the detection mechanism monitors that the salt concentration exceeds the set value, the controller can start the control water pump to make the spray adjustment mechanism spray water to the surface layer of the substrate, so as to achieve the purpose of reducing the salt concentration on the surface of the substrate. Compared with manual operation, the operation steps are simplified, and the salt control process in the tobacco seedling raising process is more efficient and labor-saving.
[0006] The purpose of the second aspect of the present invention is to solve the technical problem that when the existing electrode connector directly contacts the substrate for detection, due to the presence of impurities in the substrate, the detected salt concentration can only obtain a rough range, and the result accuracy is not high. Further, the electrode detection component includes a negative pressure tube, a receiving container and an electrode probe. The negative pressure tube is vertically arranged inside the probe housing. The receiving container is connected to the output end of the negative pressure tube through a pipeline. The electrode probe extends into the inside of the receiving container. The electrode probe of the electrode detection component is arranged inside the probe housing, so that the electrode probe does not directly contact the substrate for detection. Instead, the solution in the substrate is pumped out through the vacuum filtration function of the negative pressure tube. The pumped-out solution enters the receiving container for storage, and then the conductivity of the substrate solution is measured by the electrode probe extending into the receiving container, so that the detection accuracy of the electrode probe is higher, and the conductivity of the substrate solution measured by the electrode probe can be accurately obtained. Then, according to the calibration formula of conductivity and salt content, the conductivity of the substrate solution is converted into salt content. The detection result of the electrode probe combined with the moisture content of the substrate measured by the moisture sensor can accurately calculate the actual salt concentration of the substrate.
[0007] Preferably, the detection mechanism further comprises a measuring frame, the measuring frame comprises fixed needles and a fixed plate, the fixed needles are evenly arranged around the fixed plate, a salt measuring probe is arranged in the middle of the fixed plate, and the length of the fixed needles is greater than the length of the salt measuring probe. The fixed needles arranged around the measuring frame can facilitate the insertion of the detection mechanism into the matrix, and the salt measuring probe can be surrounded in the center to achieve stable support, avoiding the salt measuring probe from being damaged due to tilt or stress concentration, and the fixed needles are longer than the salt measuring probe so that the depth of the salt measuring probe inserted into the matrix can be controlled.
[0008] The third aspect of the utility model aims to solve the technical problem of difficulty in inserting the salt detection probe and the fixed needle into the matrix at the same time. Further, a lifting mechanism is installed on the measuring frame, and the lifting mechanism is connected to the top of the salt detection probe in a transmission manner. The lifting mechanism can control the lifting and lowering of the salt detection probe and provide a force for inserting the salt detection probe into the matrix. After the fixed needle is inserted into the matrix, the lifting mechanism drives the salt detection probe downward into the matrix for salt detection, and the insertion of the salt detection probe is more efficient.
[0009] Preferably, it also includes a seedling raising shed, a support frame is arranged on the top of the seedling raising shed, and the spray regulating mechanism is arranged above the seedling raising shed through the support frame.
[0010] Preferably, the spray regulating mechanism further comprises a spray nozzle, a connecting pipe and a water storage container, wherein the connecting pipe is mounted on the support frame, the spray nozzle is connected to the water storage container via the connecting pipe, and the control water pump is mounted on the connecting pipe. The spray regulating mechanism pumps water to the water storage container via the connecting pipe, and the controller can receive the measurement data sent back by the salt detection probe. When the salt concentration exceeds the set value, the control water pump is turned on, the connecting pipe pumps water from the water storage container, and the connecting pipe outputs water to the spray nozzle, spraying it onto the substrate surface to reduce the salt concentration. When the salt concentration reaches the set reasonable range, the control water pump is turned off, and the spray nozzle stops spraying water.
[0011] Preferably, the spray nozzle is a water mist nozzle, and the water mist output flow rate of the water mist nozzle is set to 0.6L / min-1L / min. The spray water output by the spray nozzle is in the form of water mist, which will not affect the normal growth of tobacco seedlings and can also achieve the purpose of reducing salt concentration.
[0012] Preferably, a water inlet is provided on the top of the water storage container, the water inlet is connected to a water source, at least one water outlet is provided on the bottom of the water storage container, and a connecting pipe is installed on the water outlet. The water storage container is provided with multiple water outlets at the bottom to facilitate multiple spray adjustment mechanisms to share one water storage container to achieve a spraying effect, thereby reducing the number of water storage containers opened, so that the water supply to the water storage container can be more centralized.
[0013] The fourth aspect of the present utility model aims to solve the technical problem that the seedling-raising shed is too large, and the single spray nozzle of the spray adjustment mechanism for output will result in a small salt reduction range. Preferably, the connecting pipe includes a first connecting pipe and a second connecting pipe. The first connecting pipe is the pipeline between the water storage container and the control water pump, and the second connecting pipe is the pipeline between the control water pump and the spray nozzle. The first connecting pipe and the second connecting pipe are connected through a multi-way joint, and the multi-way joint connects multiple second connecting pipes. In this solution, multiple second connecting pipes are connected to the first connecting pipe through the multi-way joint. A control water pump is arranged on the first connecting pipe. After the control water pump is started, the first connecting pipe pumps water from the water storage container, and the water flow in the first connecting pipe is divided into multiple second connecting pipes through the multi-way joint. Multiple second connecting pipes can be distributed in the seedling-raising shed for water supply, so that multiple spray joints can be arranged in the seedling-raising shed to spray water for salt reduction, improving the spraying range of the spray adjustment mechanism and also improving the efficiency of single spraying at the same time.
[0014] The beneficial effects of the present utility model are as follows:
[0015] Under the action of the controller, the detection mechanism and the spray adjustment mechanism are interlocked. The salt measurement probe can send the detected salt information to the controller. If the salt measurement probe of the detection mechanism monitors that the salt concentration exceeds the set value, the controller can start the control water pump to make the spray adjustment mechanism spray water to the surface of the substrate, achieving the purpose of reducing the salt concentration on the surface of the substrate without manual measurement and manual spraying, improving the accuracy of the substrate salt concentration detection and the control efficiency of the control spray adjustment mechanism. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the present utility model.
[0017] Figure 2 It is a schematic structural diagram of the detection mechanism of the present utility model Figure 1 。
[0018] Figure 3 It is a schematic structural diagram of the detection mechanism of the present utility model Figure 2 。
[0019] Figure 4 It is a schematic structural diagram of the salt measurement probe of the present utility model.
[0020] Figure 5 It is a schematic structural diagram of the spray adjustment mechanism of the present utility model.
[0021] The reference numerals include: 1. salt content measurement probe; 11. probe housing; 12. moisture sensor; 13. negative pressure tube; 14. receiving container; 15. electrode probe; 2. measurement rack; 21. fixing pin; 22. fixing plate; 3. spray nozzle; 4. water storage container; 5. connecting pipe; 51. first connecting pipe; 52. second connecting pipe; 53. multi-way joint; 6. control water pump; 7. lifting mechanism; 8. seedling raising shed; 81. support frame. Detailed implementation mode
[0022] In order to make the purpose, technical solutions and advantages of the embodiments more clear, the following further details the present invention in conjunction with the drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation modes described in the following exemplary embodiments do not represent all implementation modes consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0023] It should be noted that all actions of obtaining signals, information or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining authorization from the owner of the corresponding device.
[0024] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the own contour of the corresponding parts. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance.
[0025] Embodiment 1:
[0026] As Figures 1-5 shown, a device for detecting and adjusting the salt concentration of the substrate for tobacco seedling raising in this embodiment includes a detection mechanism, a spray adjustment mechanism and a controller. The detection mechanism includes a salt content measurement probe 1 for detecting the salt concentration of the substrate. The spray adjustment mechanism includes a control water pump 6, and the control water pump 6 is used to control the spray adjustment mechanism to realize the spraying function. The salt content measurement probe 1 and the control water pump 6 are electrically connected through the controller.
[0027] The detection mechanism is set to detect the salt concentration on the surface layer of tobacco seedlings. Under the action of the controller, the detection mechanism and the spray adjustment mechanism are interlocked. The salt measurement probe 1 can send the detected salt information to the controller, eliminating the need for manual measurement. When the salt measurement probe 1 of the detection mechanism detects that the salt concentration exceeds the set value, the controller can start the control water pump 6 to make the spray adjustment mechanism spray water onto the surface layer of the substrate, so as to achieve the purpose of reducing the salt concentration on the surface of the substrate. This can greatly increase the survival rate of tobacco seedlings, reduce the salt damage during the seedling raising process, and better cultivate strong seedlings. Compared with manual operation, the operation steps are simplified, and the salt control process in the tobacco seedling raising process is more efficient and labor-saving.
[0028] According to the different salt tolerances of different tobacco varieties, different salt concentration thresholds can be set in the controller to control the start of the control water pump 6. Also, the salt concentration threshold for starting the control water pump 6 by the controller can be adjusted at different stages of seedling raising, so that it can be used in different seedling raising periods of different varieties.
[0029] The salt measurement probe 1 includes a probe housing 11, a moisture sensor 12, and an electrode detection component. The moisture sensor 12 and the electrode detection component are installed in the internal cavity of the probe housing 11. The moisture sensor 12 and the electrode detection component are electrically connected to the controller. The moisture content of the substrate is measured by the moisture sensor 12, and the conductivity of the substrate is measured by the electrode detection component. The moisture sensor and the electrode detection component are electrically connected to the controller. According to the calibration formula between conductivity and salt content, it is converted into salt content and combined with the moisture content of the substrate to calculate the actual salt content of the substrate, and the controller receives the salt concentration signal.
[0030] The controller includes a signal base station, which is set at a place in the seedling raising shed. The signal base station is electrically connected to the moisture sensor, the electrode detection component, and the control water pump through wireless signals. The moisture sensor, the electrode detection component, and the control water pump are all provided with signal processing components for signal detection and transmission.
[0031] During the process of the spray adjustment mechanism continuously spraying water onto the surface layer of the substrate, the detection mechanism inserted in the seedling tray continuously measures the salt concentration in the substrate, so that the salt concentration on the surface of the substrate is reduced to below the current standard salt concentration value.
[0032] Embodiment 2:
[0033] As Figure 4 shown, the electrode detection component of this embodiment includes a negative pressure tube 13, a receiving container 14, and an electrode probe 15. The negative pressure tube 13 is vertically arranged inside the probe housing 11. The receiving container 14 is connected to the output end of the negative pressure tube 13 through a pipeline, and the electrode probe 15 extends into the inside of the receiving container 14.
[0034] The electrode probe 15 of the electrode detection assembly is arranged inside the probe housing 11, so that the electrode probe 15 does not directly contact the matrix for detection, but extracts the solution in the matrix through the vacuum filtration function of the negative pressure tube 13, and the extracted solution enters the receiving container 14 for storage, and then the conductivity of the matrix solution is measured by the electrode probe 15 inserted into the receiving container 14, so that the detection accuracy of the electrode probe 15 is higher, and the conductivity of the matrix solution measured by the electrode probe 15 can be accurately obtained, and then the conductivity of the matrix solution is converted into salt content according to the conductivity and salt content calibration formula. The detection result of the electrode probe 15 combined with the moisture content of the matrix measured by the moisture sensor 12 can accurately calculate the actual salt concentration of the matrix.
[0035] In order to enable the negative pressure tube 13 to achieve the vacuum filtration function, this embodiment is provided with a small vacuum pump for pumping air to achieve negative pressure. The vacuum pump is arranged outside the detection mechanism. The vacuum pump is provided with a vacuum tube connected to the negative pressure tube and pumps air into the negative pressure tube to eliminate the internal air pressure of the negative pressure tube, so that a low pressure area is formed in the tube, and then the liquid in the matrix is sucked into the receiving container through the bottom of the negative pressure tube. Figures 2-3 As shown, the detection mechanism of this embodiment also includes a measuring frame 2, which includes fixed needles 21 and a fixed plate 22. The fixed needles 21 are evenly arranged around the fixed plate 22, and the salt measurement probe 1 is arranged in the middle of the fixed plate 22.
[0036] Providing fixing pins 21 around the measuring frame 2 can facilitate the insertion of the detection mechanism into the matrix, and surrounding the salt measuring probe 1 in the center can achieve stable support, thereby preventing the salt measuring probe 1 from being damaged due to tilt or stress concentration.
[0037] In this embodiment, in order to facilitate the insertion of the salt detection probe 1 into the matrix, the bottom of the probe housing 11 of the salt detection probe 1 can be set to a triangular tip structure.
[0038] The length of the fixing needle 21 is greater than the length of the salt measuring probe 1. The fixing needle 21 is longer than the salt measuring probe so that the depth of the salt measuring probe 1 inserted into the matrix can be controlled.
[0039] Embodiment 3:
[0040] like Figures 2-3 As shown, a lifting mechanism 7 is installed on the measuring frame 2 of this embodiment, and the lifting mechanism 7 is transmission-connected to the top of the salt measuring probe 1 .
[0041] The lifting mechanism 7 can control the lifting of the salt measuring probe 1 and provide a force for inserting the salt measuring probe 1 into the matrix. After the fixing needle 21 is inserted into the matrix, the lifting mechanism 7 drives the salt measuring probe 1 downward into the matrix for salt detection, and the insertion of the salt detection probe 1 is more efficient.
[0042] Preferably, the lifting mechanism 7 in this embodiment adopts a telescopic motor, which includes an electric push rod that can be telescoped in the linear direction. The output end of the electric push rod is connected to the top of the salinity measurement probe.
[0043] The lifting mechanism 7 can also adopt a telescopic cylinder to realize the lifting function, and connect the top of the salinity detection probe 1 to the telescopic part of the lifting mechanism 7.
[0044] The lifting mechanism 7 is configured with a power supply component for power supply. The power supply component provides a power source for the lifting mechanism. The lifting mechanism 7 is also provided with a switch component for controlling the driving of the power supply component and the telescopic part in the lifting mechanism. During the use of the detection mechanism, by turning on the switch component, the lifting mechanism can be started to lift, so as to drive the salinity measurement probe to insert downward into the surface layer of the substrate for detection.
[0045] In the actual operation process, first place the detection mechanism above the seedling tray, insert the measurement rack 2 into the substrate through the fixing pins 21. After the fixing pins 21 evenly arranged symmetrically around the fixing plate 22 are inserted into the substrate, they can position the entire detection mechanism, so that the detection mechanism can be stably inserted into the substrate, as Figure 2 shown. Then start the lifting mechanism 7 to apply a force to insert the salinity detection probe 1 into the substrate. Since the detection mechanism is stably positioned by the fixing pins 21, the salinity detection probe 1 can be stably inserted downward during the process of inserting into the substrate, as Figure 3 shown; positioning the detection mechanism first and then inserting the salinity detection probe 1 can prevent the salinity detection probe 1 from shaking during the insertion process, resulting in an enlarged range of the insertion hole diameter and affecting the growth of tobacco seedlings in the seedling tray.
[0046] Embodiment 4:
[0047] On the basis of Embodiment 1, this embodiment further includes a seedling-raising shed 8. A support frame 81 is provided at the top of the seedling-raising shed 8, and the spray adjustment mechanism is arranged above the seedling-raising shed 8 through the support frame 81.
[0048] A plurality of seedling trays planted with tobacco seedlings are arranged in the seedling-raising shed 8, and the spray nozzles 3 of the spray adjustment mechanism are arranged at the upper ends of the seedling trays, so that the water mist sprayed by the spray nozzles 3 can be received by the seedling trays.
[0049] Preferably, the spray adjustment mechanism further includes a spray nozzle 3, a connecting pipe 5, and a water storage container 4. The connecting pipe 5 is installed on the support frame 81. The spray nozzle 3 is connected to the water storage container 4 through the connecting pipe 5. The control water pump 6 is installed on the connecting pipe 5. The spray adjustment mechanism pumps water from the water storage container 4 through the connecting pipe 5. The controller can receive the measurement data transmitted back by the salt detection probe 1. When the salt concentration exceeds the set value, the control water pump 6 will be turned on. The connecting pipe 5 pumps water from the water storage container 4, and the connecting pipe 5 outputs water to the spray nozzle 3, which sprays onto the substrate surface to reduce the salt concentration. When the salt concentration reaches the set reasonable range, the control water pump 6 is turned off, and the spray nozzle 3 stops spraying water.
[0050] The spray nozzle 3 of this embodiment is a water mist type nozzle, and the water mist output flow rate of the water mist type nozzle is set to 0.6L / min - 1L / min. Making the sprayed water from the spray nozzle 3 in the form of water mist will neither affect the normal growth of tobacco seedlings nor achieve the purpose of reducing the salt concentration; the water mist sprayed by the spray nozzle 3 can also be evenly sprayed to each position of the seedling tray, making the adjustment of the salt concentration of the seedling trays in the seedling shed consistent.
[0051] The spray nozzle 3 can adjust the aperture and pressure of the water mist nozzle to control the water flow rate.
[0052] The top of the water storage container 4 is provided with a water inlet, the water inlet is connected to a water source, and the bottom of the water storage container 4 is provided with at least one water outlet, and the water outlet is installed with the connecting pipe 5.
[0053] It is necessary to observe the water level in the water storage container 4 at intervals. If the water level is low, add water to the water inlet of the water storage container 4 in time to keep the water level higher than the water outlet of the water storage container 4. The water storage container 4 is provided with a plurality of water outlets at the bottom to facilitate several spray adjustment mechanisms to share one water storage container 4 to achieve the spray effect, reducing the number of water storage containers 4 opened, and making the water supply to the water storage container 4 more concentrated.
[0054] Embodiment 4:
[0055] As Figure 5 shown, the connecting pipe 5 of this embodiment includes a first connecting pipe 51 and a second connecting pipe 52. The first connecting pipe 51 is the pipeline between the water storage container 4 and the control water pump 6, and the second connecting pipe 52 is the pipeline between the control water pump 6 and the spray nozzle 3. The first connecting pipe 51 and the second connecting pipe 52 are connected through a multi-way joint 53, and the multi-way joint 53 is connected to a plurality of second connecting pipes 52.
[0056] In this embodiment, a multi-way joint 53 is used to connect multiple second connecting pipes 52 to the first connecting pipe 51. A control water pump 6 is arranged on the first connecting pipe 51. After the control water pump 6 is turned on, the first connecting pipe 51 pumps water into the water storage container 4, and the water flow in the first connecting pipe 51 is diverted to multiple second connecting pipes 52 through the multi-way joint 53. Multiple second connecting pipes 52 can be distributed in the seedling-raising shed 8 for water supply, so that multiple spray joints 3 can be arranged in the seedling-raising shed for spraying to reduce salt content.
[0057] In addition, according to the length and width data of the area of the seedling-raising shed 8, multiple second connecting pipes 52 arranged in the seedling-raising shed 8 are arranged, and multiple spray nozzles 3 can be evenly arranged on the second connecting pipes 52. The multiple spray nozzles 3 are connected in series to the second connecting pipes 52 through three-way sleeves, so that the long sides and end faces of the seedling-raising shed 8 can be evenly distributed with spray nozzles 3 for use.
[0058] The above are only embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the solutions is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.
Claims
1. A substrate salt concentration detection and adjustment device for tobacco seedling cultivation, characterized in that: The invention comprises a detection mechanism, a spray regulating mechanism and a controller, wherein the detection mechanism comprises a salt measuring probe (1) for detecting the salt concentration of the matrix, the spray regulating mechanism comprises a control water pump (6), the control water pump (6) is used to control the spray regulating mechanism to realize the spraying function, and the salt measuring probe (1) and the control water pump (6) are electrically connected via the controller; The salt content measuring probe (1) comprises a probe housing (11), a moisture sensor (12) and an electrode detection assembly. The moisture sensor (12) and the electrode detection assembly are installed in the internal cavity of the probe housing (11). The moisture sensor (12) and the electrode detection assembly are electrically connected to a controller.
2. The substrate salt concentration detection and adjustment device for tobacco seedling cultivation according to claim 1, characterized in that: The electrode detection assembly comprises a negative pressure tube (13), a receiving container (14) and an electrode probe (15); the negative pressure tube (13) is vertically arranged inside the probe housing (11); the receiving container (14) is connected to the output end of the negative pressure tube (13) through a pipeline; and the electrode probe (15) extends into the interior of the receiving container (14).
3. The substrate salt concentration detection and adjustment device for tobacco seedling cultivation according to claim 1, characterized in that: The detection mechanism also includes a measuring frame (2), the measuring frame (2) includes fixed needles (21) and a fixed plate (22), the fixed needles (21) are evenly arranged around the fixed plate (22), a salt content measuring probe (1) is arranged in the middle of the fixed plate (22), and the length of the fixed needles (21) is greater than the length of the salt content measuring probe (1).
4. The device for detecting and adjusting substrate salt concentration for tobacco seedling cultivation according to claim 3, characterized in that: A lifting mechanism (7) is installed on the measuring frame (2), and the lifting mechanism (7) is in transmission connection with the top of the salt measuring probe (1).
5. A substrate salt concentration detection and adjustment device for tobacco seedling cultivation according to any one of claims 1 to 4, characterized in that: It also comprises a seedling raising shed (8), a support frame (81) being arranged on the top of the seedling raising shed (8), and a spray regulating mechanism being arranged above the seedling raising shed (8) via the support frame (81).
6. The substrate salt concentration detection and adjustment device for tobacco seedling cultivation according to claim 1, characterized in that: The spray regulating mechanism also includes a spray nozzle (3), a connecting pipe (5) and a water storage container (4); the connecting pipe (5) is mounted on a support frame (81); the spray nozzle (3) and the water storage container (4) are connected via the connecting pipe (5); and a control water pump (6) is mounted on the connecting pipe (5).
7. The device for detecting and adjusting substrate salt concentration for tobacco seedling cultivation according to claim 6, characterized in that: The spray nozzle (3) is a water mist nozzle, and the water mist output flow rate of the water mist nozzle is set to 0.6L / min-1L / min.
8. The device for detecting and adjusting substrate salt concentration for tobacco seedling cultivation according to claim 6, characterized in that: A water inlet is arranged on the top of the water storage container (4), and the water inlet is connected to a water source. At least one water outlet is arranged on the bottom of the water storage container (4), and a connecting pipe (5) is installed at the water outlet.
9. The substrate salt concentration detection and adjustment device for tobacco seedling cultivation according to claim 6, characterized in that: The connecting pipe (5) comprises a first connecting pipe (51) and a second connecting pipe (52); the first connecting pipe (51) is a pipe between the water storage container (4) and the control water pump (6); the second connecting pipe (52) is a pipe between the control water pump (6) and the spray nozzle (3); the first connecting pipe (51) and the second connecting pipe (52) are connected via a multi-way joint (53); and the multi-way joint (53) connects a plurality of second connecting pipes (52).