Compacted soil preparation device and method for calibrating displacement and pressure thereof

Abstract

The application relates to the field of botany, and provides a compacted soil preparation device and a displacement and pressure calibration method thereof. The compacted soil preparation device has two working modes of hammering and static pressure, and comprises a supporting frame, a clamping mechanism, an automatic controller, a hammering mechanism and a static pressure mechanism. The clamping mechanism is arranged at the bottom of the supporting frame, a clamping bin is arranged in the clamping mechanism, the clamping bin is used for containing a culture box, and the automatic controller is signal-connected with the hammering mechanism and the static pressure mechanism respectively. The compacted soil can be prepared in the root box, two different compaction modes of hammering compaction and static force compaction are provided, the compaction conditions of the soil are simulated, and quantitative characterization is simultaneously performed, so that more controllable and accurate experimental conditions are provided for the research on the response of plant root systems to compacted soil, and the application is expected to promote the related research on crop growth environment optimization and agricultural production.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plant research, in particular, to a compacted soil preparation device and a displacement and pressure calibration method thereof. BACKGROUND

[0002] In the field of plant research, it is very important to study the phenotype of crop root system. The root system of a plant provides support for the plant and is an organ for absorbing water and nutrients from the soil, which can affect the yield to some extent and can sense the environment to transmit ion signals and hormone signals to regulate plant growth and development. Studies have shown that varieties with deep root systems have stronger nitrogen absorption capacity and are helpful for crop drought resistance. Therefore, the interaction between root system and soil is crucial for improving crop yield and improving the ability of crops to adapt to changing soil environments.

[0003] The root system of a plant has strong plasticity, and differences in water, mineral nutrients, microorganisms, and soil permeability can cause changes in root system configuration. The soil environment is very complex. Soil is a mixture of solid, liquid, and gas, and the solid clay particles form a unique soil aggregate structure to produce interconnected pores of different sizes in the soil, with water and gas filling in these pores. Even the same piece of land can have large differences in soil properties due to differences in location and depth.

[0004] Obtaining root phenotypes in the laboratory through potting is one of the most promising techniques for investigating root phenotypes. It can make plants grow in a soil environment similar to that of a field, fully utilize the controllable climate of an intelligent greenhouse, and reduce the difficulty of root sampling. However, due to the strong heterogeneity of soil and the high plasticity of root system, it is easy to cause differences in root phenotypes between pots due to uneven soil. To distinguish whether the phenotypic changes are caused by soil or experimental treatment, a large number of repetitions are required to obtain statistical differences, which will consume a large amount of resources.

[0005] Soil porosity is an important indicator of soil, and its changes can change the solid-liquid-gas environment of the soil and affect the root development, respiration, and nutrient uptake of crops. At the same time, it can change the rhizosphere microflora. In order to control the consistency of soil between pots, it is easy to choose the same type of soil with consistent particle size to fill with the same porosity.

[0006] It is necessary to prepare soil with consistent compaction in different plant culture devices for simulating crop root response in actual growth environment. Existing soil compaction devices are usually used in industry and cannot adapt to plant culture containers. Soil samples compacted in advance cannot be placed in culture containers while maintaining compaction. This limits in-depth study of root response. In a laboratory environment, it is necessary to ensure that compaction is uniform and repeatable to obtain reliable experimental results. However, there is currently no device that can operate in a culture box while having both free-fall (hammer) compaction and static compaction modes. SUMMARY

[0007] In view of the defects in the prior art, the purpose of the present application is to provide a compaction soil preparation device and a displacement and pressure calibration method thereof.

[0008] The compaction soil preparation device provided by the present application has two working modes of hammering and static pressure, and comprises a support frame, a clamping mechanism, an automatic controller, a hammering mechanism and a static pressure mechanism.

[0009] The clamping mechanism is arranged at the bottom of the support frame, and a clamping chamber for containing culture boxes is arranged in the clamping mechanism. The automatic controller is signal-connected with the hammering mechanism and the static pressure mechanism respectively.

[0010] In the hammering mode, the hammering mechanism is arranged at the top of the support frame and directly above the culture boxes, and the hammering mechanism can perform hammering work on the soil in the culture boxes.

[0011] In the static pressure mode, the static pressure mechanism is arranged at the top of the support frame and directly above the culture boxes, and the static pressure mechanism can perform static pressure work on the soil in the culture boxes.

[0012] Preferably, the support frame comprises an upper frame and a lower frame, the upper frame is detachably arranged above the lower frame, the hammering mechanism is arranged on the upper frame in the hammering mode, and the static pressure mechanism is arranged on the upper frame in the static pressure mode.

[0013] Preferably, the clamping mechanism comprises a buffer hammer and a clamping table, the clamping chamber is located in the inside of the clamping table, and the buffer hammer is arranged between the culture boxes and the hammering mechanism; or the buffer hammer is arranged between the culture boxes and the static pressure mechanism.

[0014] Preferably, the buffer hammer comprises a buffer hammer guide column, a buffer hammer pad, and a buffer hammer column, the lower end of the buffer hammer guide column is arranged on the clamping table, the upper end of the buffer hammer guide column penetrates the buffer hammer pad, the upper end of the buffer hammer column is fixed on the buffer hammer pad, and the buffer hammer pad can drive the buffer hammer column to make a hammering movement into the culture box under the guidance of the buffer hammer guide column when downward force is applied to the buffer hammer pad.

[0015] Preferably, the clamping table comprises a perforated top plate, a U-shaped fixed column, a screw rod, a handle, a clamping steel plate, a guide rod, and a perforated bottom plate, the perforated top plate is arranged at the upper end of the U-shaped fixed column, and the perforated bottom plate is arranged at the lower end of the U-shaped fixed column.

[0016] The number of the U-shaped fixed columns is four, each of the U-shaped fixed columns is provided with a screw rod and is threadedly connected with the screw rod, the inner side end of the screw rod is connected with the clamping steel plate, the outer side end of the screw rod is provided with a handle, and the space formed by the four clamping steel plates and the perforated bottom plate forms the clamping chamber.

[0017] Preferably, the support frame is provided with a slide rail light axis and a force applying hammer, and the hammering mechanism comprises a traction motor support, a first pull wire displacement sensor, a traction electric push rod, a chain wheel, a chain, a traction sliding block, and an electromagnet.

[0018] The traction motor support is detachably arranged at the top end of the support frame, the traction sliding block is sleeved on the slide rail light axis and is provided at the bottom with the electromagnet, one end of the chain is arranged at one side of the traction motor support, the other end of the chain is first extended downward to wrap around the bottom end of the chain wheel, then is extended upward to wrap around the top end of a pulley arranged at the other side of the traction motor support, and then is extended downward to be connected with the top of the traction sliding block, the top end of the first pull wire displacement sensor is connected with the top end of the support frame, and the bottom end of the first pull wire displacement sensor is connected with the traction sliding block.

[0019] The top end of the traction electric push rod is connected with the traction motor support, and the bottom end of the traction electric push rod is drivingly connected with the chain wheel, so that the traction sliding block can be driven to ascend or descend through the chain when the traction electric push rod is elongated or shortened.

[0020] Preferably, the support frame is provided with a slide rail light axis and a force applying hammer, and the static pressure mechanism comprises a middle cross beam, a second pull wire displacement sensor, a static pressure electric push rod, a pressure sensor, a positioning plate, and a hydraulic damping rod.

[0021] The middle cross beam is detachably arranged on the top of the support frame, the top of the static pressure electric push rod is arranged on the middle cross beam, the bottom of the static pressure electric push rod is connected with the force applying hammer through a hydraulic damping rod, the pressure sensor is arranged between the hydraulic damping rod and the static pressure electric push rod, the positioning plate is arranged on the top end of the hydraulic damping rod, and the top end and the bottom end of the second wire displacement sensor are connected with the middle cross beam and the positioning plate respectively.

[0022] According to the displacement calibration method of the soil compaction device provided by the application, the following steps are included:

[0023] S1: entering the displacement calibration software interface, turning on the power supply of the automatic controller and the power switch, and entering the "main function selection interface" after waiting for system initialization to be completed; selecting "static pressure mode" to enter the static pressure mode interface, selecting the "displacement calibration" button in the "real-time displacement detection" window in the static pressure mode interface, or selecting "hammering mode" to enter the hammering mode interface, and selecting the "displacement calibration" button in the "real-time displacement detection" window in the hammering mode interface;

[0024] S2: manually taking down the positioning end of the first wire displacement sensor or the second wire displacement sensor, pulling to an arbitrary fixed position 1 along the wire direction and keeping unchanged; selecting the "set position 1" input box in the "first step" window of the displacement calibration software interface and filling in the data "0"; and clicking the "collect position 1 signal" button in the "first step" window, so that the differential voltage signal of the first wire displacement sensor or the second wire displacement sensor corresponding to position 1 is automatically filled into the "position 1 signal" text box;

[0025] S3: manually pulling the positioning end of the first wire displacement sensor or the second wire displacement sensor to an arbitrary fixed position 2 along the wire direction and keeping unchanged, wherein the displacement of position 2 is greater than that of position 1; measuring the distance between position 1 and position 2; selecting the "set position 2" input box in the "second step" window of the displacement calibration software interface and filling in the measured distance; and clicking the "collect position 2 signal" button in the "second step" window, so that the differential voltage signal of the first wire displacement sensor or the second wire displacement sensor corresponding to position 2 is automatically filled into the "position 2 signal" text box;

[0026] S4: selecting the "displacement calibration" button, and the system will automatically calculate the "current signal proportion parameter" value and display the result in the corresponding text box.

[0027] According to the pressure calibration method of the soil compaction device provided by the application, the following steps are included:

[0028] M1: Enter the pressure calibration software interface, connect the power supply of the automatic controller and turn on the power switch; wait for the system initialization to complete and enter the "Main Function Selection Interface"; select "Static Pressure Mode" to enter the static pressure mode interface; in the "Real-time Pressure Detection" window of the static pressure mode interface, select the "Pressure Calibration" button;

[0029] M2: Suspend two standard weights on the hydraulic buffer below the pressure sensor. In the "Step 1" window of the pressure calibration software interface, select the "Set Pressure 1" input box and fill in the data "0". Click the "Acquire Pressure 1 Signal" button in the "Step 1" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 1 will be automatically filled into the "Pressure 1 Signal" text box.

[0030] M3: Remove the next weight, and the pulling force will be the weight of the single weight. In the "Second Step" window of the pressure calibration software interface, select the "Set Pressure 2" input box and fill in the data of the weight of the single weight. Click the "Acquire Pressure 2 Signal" button in the "Second Step" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 2 will be automatically filled into the "Pressure 2 Signal" text box.

[0031] M4: Select the "Pressure Calibration" button, and the system will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box.

[0032] Preferably, the automatic controller shown has a power-off memory function, allowing it to be used for a long time after a single calibration;

[0033] If replacing the hardware of the second wire displacement sensor may cause errors in displacement measurement, a recalibration of displacement is required; or if replacing the hardware of the pressure sensor may cause errors in pressure measurement, a recalibration of pressure is required.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The laboratory soil compaction device provided by this invention, suitable for research in the field of botany, can prepare compacted soil in a root box and has two different compaction modes: free fall (hammering) compaction and static compaction, to simulate the compaction conditions of the soil and perform quantitative characterization. This will provide more controllable and precise experimental conditions for the study of plant root response to compacted soil, and is expected to promote related research on crop growth environment optimization and agricultural production.

[0036] 2. This invention uses a correction system to ensure the consistency of pressure applied to the soil, thereby guaranteeing accurate soil compaction and solving the problems of compaction uniformity and repeatability in the prior art. Attached Figure Description

[0037] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0038] Figure 1 This is a front view schematic diagram of the present invention in hammering mode;

[0039] Figure 2 This is a schematic diagram of the left-side structure of the present invention in hammering mode;

[0040] Figure 3 This is a top view of the structure of the present invention in hammering mode;

[0041] Figure 4 This is a schematic diagram of the structure of the present invention when viewed from the upper left in hammering mode;

[0042] Figure 5 This is a rendering of the invention in hammering mode;

[0043] Figure 6 This is a front view schematic diagram of the structure of the present invention in static pressure mode;

[0044] Figure 7 This is a schematic diagram of the left-side structure of the present invention in static pressure mode;

[0045] Figure 8 This is a top view of the structure of the present invention in static pressure mode;

[0046] Figure 9 This is a side view of the structure of the present invention in static pressure mode;

[0047] Figure 10 This is a rendering of the invention in static pressure mode;

[0048] Figure 11 This is a three-dimensional structural diagram of the clamping mechanism;

[0049] Figure 12 This is a top view schematic diagram of the clamping mechanism;

[0050] Figure 13 This is a schematic diagram of the front structure of the clamping mechanism;

[0051] Figure 14 This is a side view of the clamping mechanism.

[0052] Figure 15 This is a schematic diagram of the three-view structure of an automatic controller;

[0053] Figure 16 This is a diagram of the software function interface of the present invention.

[0054] The diagram shows:

[0055] 1-Lower frame; 11-Upper frame connection holes; 12-Lower frame column; 13-Base plate;

[0056] 2-Upper frame; 21-Upper crossbeam; 22-Upper frame column; 23-Crossbeam adjustment and positioning hole; 24-Slide rail optical shaft; 25-Force hammer; 251-Force hammer slide plate; 252-Force hammer linear bearing; 253-Force hammer hammer column; 26-Optical shaft fixing nut; 27-Lower crossbeam;

[0057] 3-Hammering mechanism; 31-Traction motor bracket; 32-Wire displacement sensor; 33-Traction electric push rod; 34-Sprocket; 35-Chain; 36-Chain fixing pin; 37-Traction slider linear bearing; 38-Traction slider; 39-Electromagnet;

[0058] 4-Clamping mechanism; 41-Buffer hammer; 411-Buffer hammer guide post; 412-Buffer hammer pad; 413-Buffer hammer column; 42-Clamping platform; 421-Porous top plate; 422-U-shaped fixed column; 423-Screw; 424-Handle; 425-Clamping steel plate; 426-Guide rod; 427-Porous bottom plate; 43-Cultivation box;

[0059] 5-Hydrostatic pressure mechanism; 51-Central crossbeam; 52-Wire displacement sensor; 53-Hydrostatic pressure electric actuator; 54-Pressure sensor; 55-Positioning plate; 56-Hydraulic damping rod;

[0060] 6-Automatic controller; 61-Controller chassis; 611-Heat dissipation vents; 612-Carrying handle; 62-Front panel; 621-Touch LCD screen; 622-Reset button; 63-Rear panel; 631-Main control board USB interface; 632-LCD screen USB interface; 633-First aviation connector terminal; 634-Second aviation connector terminal; 635-Power switch; 636-Power input interface. Detailed Implementation

[0061] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0062] Example 1:

[0063] This invention provides a soil compaction preparation device with two working modes: hammering and static pressure. It includes a support frame, a clamping mechanism 4, an automatic controller 6, a hammering mechanism 3, and a static pressure mechanism 5. The clamping mechanism 4 is located at the bottom of the support frame and has a clamping chamber inside. The clamping chamber is used to hold the culture box 43. The automatic controller 6 is connected to the hammering mechanism 3 and the static pressure mechanism 5 respectively. The automatic controller 6 can control the hammering mechanism 3 to perform hammering operations or control the static pressure mechanism 5 to perform static pressure operations.

[0064] Specifically, in the hammering mode, the hammering mechanism 3 is configured on the top of the support frame and directly above the culture box 43, and the hammering mechanism 3 can perform hammering operations on the soil in the culture box 43; in the static pressure mode, the static pressure mechanism 5 is configured on the top of the support frame and directly above the culture box 43, and the static pressure mechanism 5 can perform static pressure operations on the soil in the culture box 43.

[0065] like Figure 1 As shown, the support frame includes an upper frame 2 and a lower frame 1. The upper frame 2 is detachably configured above the lower frame 1. In the hammering mode, the hammering mechanism 3 is configured on the upper frame 2; in the static pressure mode, the static pressure mechanism 5 is configured on the upper frame 2.

[0066] like Figures 1-5 As shown, the lower frame 1 includes a lower frame column 12 and a base plate 13. The bottom of the lower frame column 12 is fixed on the base plate 13. The upper end of the lower frame column 12 is provided with an upper frame connection hole 11 and an ear plate. The upper frame 2 can be connected to the lower frame 1 through the upper frame connection hole 11 and the ear plate via a connector. The connector can be screws or the like, to fix the upper frame 2 and the lower frame 1.

[0067] like Figures 1-5As shown, the upper frame 2 includes an upper crossbeam 21, upper frame columns 22, crossbeam adjustment and positioning holes 23, a slide rail optical shaft 24, a force hammer 25, an optical shaft fixing nut 26, and a lower crossbeam 27. There are two upper frame columns 22. The upper ends of the two upper frame columns 22 are respectively fixed to the two ends of the upper crossbeam 21, and the lower ends of the two upper frame columns 22 are respectively fixed to the two ends of the lower crossbeam 27. The two upper frame columns 22, the upper crossbeam 21, and the lower crossbeam 27 together form a square frame support structure. The upper frame columns 22 have multiple crossbeam adjustment and positioning holes 23, which can be used to adjust the height of the upper crossbeam 21 fixed on the upper frame columns 22. The upper end of the slide rail optical shaft 24 is detachably fixed to the upper crossbeam 21 by the optical shaft fixing nut 26, and the lower end of the slide rail optical shaft 24 is detachably fixed to the lower crossbeam 27 by the optical shaft fixing nut 26. The striking hammer 25 includes a striking hammer slide plate 251, a striking hammer linear bearing 252, and a striking hammer column 253. The top end of the striking hammer column 253 is fixed on the striking hammer slide plate 251, and the bottom end of the striking hammer column 253 extends through the lower crossbeam 27 to the clamping mechanism 4. The two ends of the striking hammer slide plate 251 are respectively slidably engaged with two slide rail shafts 24 through the striking hammer linear bearing 252. The striking hammer slide plate 251 can slide up and down under the drive of the striking mechanism 3 or the static pressure mechanism 5.

[0068] like Figures 1-5 , Figures 11-14 As shown, the clamping mechanism 4 includes a buffer hammer 41 and a clamping platform 42. The clamping chamber is located inside the clamping platform 42. The buffer hammer 41 is arranged between the culture box 43 and the hammering mechanism 3; or the buffer hammer 41 is arranged between the culture box 43 and the static pressure mechanism 5. Specifically, the buffer hammer 41 includes a buffer hammer guide post 411, a buffer hammer pad 412, and a buffer hammer column 413. The lower end of the buffer hammer guide post 411 is disposed on the clamping platform 42, and the upper end of the buffer hammer guide post 411 passes through the buffer hammer pad 412, serving as a guide for the up-and-down movement of the buffer hammer pad 412. The upper end of the buffer hammer column 413 is fixed to the buffer hammer pad 412. When a downward force is applied to the buffer hammer pad 412, the buffer hammer pad 412 can drive the buffer hammer column 413 to perform a hammering motion into the culture box 43 under the guidance of the buffer hammer guide post 411. Among them, the force-applying component of the buffer hammer pad 412 is the force-applying hammer column 253.

[0069] like Figures 1-5 , Figures 11-14As shown, the clamping table 42 includes a perforated top plate 421, a U-shaped fixed column 422, a screw 423, a handle 424, a clamping steel plate 425, a guide rod 426, and a perforated bottom plate 427. The perforated top plate 421 is arranged at the upper end of the U-shaped fixed column 422, and the perforated bottom plate 427 is arranged at the lower end of the U-shaped fixed column 422. There are four U-shaped fixed columns 422, and each U-shaped fixed column 422 is equipped with a screw 423 and is threadedly engaged with the screw 423. The inner end of the screw 423 is connected to the clamping steel plate 425, and the outer end of the screw 423 is equipped with a handle 424. The space enclosed by the four clamping steel plates 425 and the porous base plate 427 forms a clamping chamber. By driving the four clamping steel plates 425 to move towards the center, the culture box 43 can be fixed. The outer end of the guide rod 426 is fixed on the U-shaped fixed column 422, and the inner end of the guide rod 426 passes through the clamping steel plate 425. When the clamping steel plate 425 moves, the guide rod 426 provides guidance.

[0070] like Figures 1-5 As shown, the support frame has a slide rail optical shaft 24 and a hammer 25. The hammer 25 is used for hammering operations. The hammering mechanism 3 includes a traction motor bracket 31, a first pull wire displacement sensor 32, a traction electric push rod 33, a sprocket 34, a chain 35, a traction slider 38, and an electromagnet 39. The traction motor bracket 31 is detachably mounted on the upper crossbeam 21. The traction slider 38 is mounted on the slide rail optical shaft 24 and has an electromagnet 39 at its bottom. The electromagnet 39 is magnetically controlled by controlling the on and off states of power. The magnetic force attracts the hammer slide plate 251, causing... The force-applying hammer slide plate 251 is connected to the electromagnet 39, or the power is cut off to control the absence of magnetic attraction between the force-applying hammer slide plate 251 and the electromagnet 39, thus allowing them to separate. One end of the chain 35 is located on one side of the traction motor bracket 31. The other end of the chain 35 first extends downwards and wraps around the bottom half of the sprocket 34, then extends upwards and wraps around the top half of the pulley arranged on the other side of the traction motor bracket 31, and then extends downwards to connect with the top of the traction slider 38. The top of the first pull wire displacement sensor 32 is connected to the upper crossbeam 21, and the bottom is connected to the traction slider 38. The top of the traction electric push rod 33 is connected to the traction motor bracket 31, and the bottom of the traction electric push rod 33 is driven to the sprocket 34. When the traction electric push rod 33 extends or retracts, it can drive the traction slider 38 to rise or fall through the chain 35. At this time, the first pull wire displacement sensor 32 can detect the displacement of the traction slider 38 as it rises or falls.

[0071] like Figures 6-10As shown, the support frame has a slide rail optical shaft 24 and a force-applying hammer 25. The force-applying hammer 25 is used for static pressure operation. The static pressure mechanism 5 includes a middle crossbeam 51, a second pull wire displacement sensor 52, a static pressure electric actuator 53, a pressure sensor 54, a positioning plate 55, and a hydraulic damping rod 56. The middle crossbeam 51 is detachably mounted on two upper frame columns 22 and located below the upper crossbeam 21. The top of the static pressure electric actuator 53 is mounted on the middle crossbeam 51, and the bottom of the static pressure electric actuator 53 is connected to the force-applying hammer 25 through the hydraulic damping rod 56. Sensor 54 is arranged between hydraulic damping rod 56 and hydrostatic electric actuator 53. Positioning plate 55 is positioned on one side of the top of hydraulic damping rod 56. The top and bottom of second wire displacement sensor 52 are connected to the middle crossbeam 51 and positioning plate 55, respectively. When hydrostatic electric actuator 53 extends, it can drive hydraulic damping rod 56 to move downward, thereby driving hammer 25 to perform hydrostatic operation downward. At this time, positioning plate 55 moves downward synchronously with hydraulic damping rod 56. Second wire displacement sensor 52 can detect the downward displacement of hammer 25.

[0072] The present invention also provides a displacement calibration method for a compacted soil preparation device, comprising the following steps:

[0073] S1: Enter the displacement calibration software interface, connect the power supply of the automatic controller 6 and turn on the power switch 635. After the system initialization is completed, enter the "Main Function Selection Interface"; select "Static Pressure Mode" to enter the static pressure mode interface, and select the "Displacement Calibration" button in the "Real-time Displacement Detection" window of the static pressure mode interface; or select "Hammer Mode" to enter the hammer mode interface, and select the "Displacement Calibration" button in the "Real-time Displacement Detection" window of the hammer mode interface.

[0074] S2: Manually remove the positioning end of the first pull-wire displacement sensor 32 or the second pull-wire displacement sensor 52, pull it along the pull wire direction to any fixed position 1 and keep it unchanged; in the "Step 1" window of the displacement calibration software interface, select the "Set Position 1" input box and fill in the data "0"; click the "Acquire Position 1 Signal" button in the "Step 1" window, and the differential voltage signal of the first pull-wire displacement sensor 32 or the second pull-wire displacement sensor 52 corresponding to position 1 will be automatically filled into the "Position 1 Signal" text box;

[0075] S3: Manually pull the positioning end of the first wire displacement sensor 32 or the second wire displacement sensor 52 along the wire direction to any fixed position 2 and keep it unchanged, wherein the displacement of position 2 is greater than the displacement of position 1; measure the distance between position 1 and position 2; in the "Second Step" window of the displacement calibration software interface, select the "Set Position 2" input box and fill in the measured distance; click the "Acquire Position 2 Signal" button in the "Second Step" window, and the differential voltage signal of the first wire displacement sensor 32 or the second wire displacement sensor 52 corresponding to position 2 will be automatically filled into the "Position 2 Signal" text box;

[0076] S4: Select the "Displacement Calibration" button, and the system will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box.

[0077] It should be noted that the automatic controller 6 has a power-off memory function, and can be used for a long time after one calibration. If the replacement of the first wire displacement sensor 32 or the second wire displacement sensor 52 hardware may cause errors in displacement measurement, a recalibration is required.

[0078] The present invention also provides a pressure calibration method for a compacted soil preparation device, comprising the following steps:

[0079] M1: Enter the pressure calibration software interface, connect the power supply of the automatic controller 6 and turn on the power switch 635; wait for the system initialization to complete and enter the "main function selection interface"; select "static pressure mode" to enter the static pressure mode interface; in the "real-time pressure detection" window of the static pressure mode interface, select the "pressure calibration" button;

[0080] M2: Suspend two standard weights on the hydraulic damping rod 56 below the pressure sensor 54. In the "Step 1" window of the pressure calibration software interface, select the "Set Pressure 1" input box and fill in the data "0". Click the "Acquire Pressure 1 Signal" button in the "Step 1" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 1 will be automatically filled into the "Pressure 1 Signal" text box.

[0081] M3: Remove the next weight, and the pulling force will be the weight of the single weight. In the "Second Step" window of the pressure calibration software interface, select the "Set Pressure 2" input box and fill in the data of the weight of the single weight. Click the "Acquire Pressure 2 Signal" button in the "Second Step" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 2 will be automatically filled into the "Pressure 2 Signal" text box.

[0082] M4: Select the "Pressure Calibration" button, and the system will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box.

[0083] It should be noted that the automatic controller 6 has a power-off memory function, and can be used for a long time after a single calibration; if the pressure sensor 54 hardware is replaced, which may cause errors in pressure measurement, a recalibration is required.

[0084] Example 2:

[0085] This embodiment is a preferred example of Embodiment 1. The compacted soil preparation device in this embodiment adopts a modular design and can realize two different working modes: hammering and static compaction. The mechanical structures corresponding to the hammering and static compaction modes share the same clamping mechanism 4, such as... Figures 11-14 As shown; the automatic controller 6 is connected to the hammering mechanism and the static pressure mechanism via dual cables respectively. The software system of the automatic controller 6 includes an embedded program on the main control board, responsible for the underlying drivers of each functional module. The automatic controller 6 also includes a touchscreen human-machine interface program for setting operating parameters, performing real-time control, and displaying status information. All functional interfaces are shown below. Figure 16 As shown.

[0086] In this embodiment, the operation process for displacement calibration of the device is as follows (displacement calibration is enabled in both static pressure mode and hammer impact mode):

[0087] Enter the displacement calibration software interface, connect the power supply of the automatic controller 6, connect the communication dual cable, and turn on the power switch 635. After the system initialization is completed, enter the "Main Function Selection Interface"; select "Static Pressure Mode" to enter the static pressure mode interface, or select "Hammering Mode" to enter the hammering mode interface; in the "Real-time Displacement Detection" window of the static pressure mode interface, select the "Displacement Calibration" button, or in the "Real-time Displacement Detection" window of the hammering mode interface, select the "Displacement Calibration" button.

[0088] The first step of displacement calibration is as follows: Manually remove the positioning end of the first wire displacement sensor 32 or the second wire displacement sensor 52, pull it along the wire direction to any fixed position 1 and keep it there; in the first step window of the displacement calibration software interface, select the "Set Position 1" input box and fill in the data "0", that is, select the fixed position 1 as the reference origin; click the "Acquire Position 1 Signal" button in the first step window, and the differential voltage signal of the first wire displacement sensor 32 or the second wire displacement sensor 52 corresponding to position 1 will be automatically filled into the "Position 1 Signal" text box;

[0089] The second step of displacement calibration is as follows: Manually pull the positioning end of the first wire displacement sensor 32 or the second wire displacement sensor 52 along the wire direction to any fixed position 2 and keep it unchanged (the displacement of position 2 should be greater than the displacement of position 1); use a ruler to measure the distance between position 1 and position 2, taking a measurement result of "100.0mm" as an example; in the second step window of the displacement calibration software interface, select the "Set Position 2" input box and fill in the data "100.0"; click the "Acquire Position 2 Signal" button in the second step window, and the differential voltage signal of the first wire displacement sensor 32 or the second wire displacement sensor 52 corresponding to position 2 will be automatically filled into the "Position 2 Signal" text box;

[0090] Selecting the "Displacement Calibration" button will cause the system to automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box, with units of 10. -4 mm / uV;

[0091] Displacement calibration is complete. Select the "Return" button to return to the previous function interface.

[0092] Note: The automatic controller 6 has a power-off memory function, allowing for long-term use after a single calibration. Replacing the hardware of the second pull-wire displacement sensor 52 may cause errors in displacement measurement; in this case, a recalibration is required.

[0093] The pressure calibration process of the device in this embodiment is as follows (pressure calibration is only performed in static pressure mode):

[0094] Enter the pressure calibration software interface. Connect the power supply to the automatic controller 6, connect the communication dual cable, and turn on the power switch 635; wait for the system initialization to complete and enter the "Main Function Selection Interface"; select "Static Pressure Mode" to enter the static pressure mode interface; in the "Real-time Pressure Detection" window of the static pressure mode interface, select the "Pressure Calibration" button;

[0095] Pressure calibration "first step" operation: Suspend two standard weights on the hydraulic damping rod 56 below the pressure sensor 54, taking a standard weight of 1.0kg as an example; in the "first step" window of the pressure calibration software interface, select the "Set Pressure 1" input box and fill in the data "0", that is, select the current pressure (tension) as the reference origin; click the "Acquire Pressure 1 Signal" button in the "first step" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 1 will be automatically filled into the "Pressure 1 Signal" text box;

[0096] Pressure calibration "Step 2" operation: Remove the next weight, and the pulling force is now the weight of a single weight; in the "Step 2" window of the pressure calibration software interface, select the "Set Pressure 2" input box and fill in the data "1.0"; click the "Acquire Pressure 2 Signal" button in the "Step 2" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 2 will be automatically filled into the "Pressure 2 Signal" text box;

[0097] Selecting the "Pressure Calibration" button will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box, with units of 10. -4 kgF / uV;

[0098] Pressure calibration is complete. Select the "Back" button to return to the previous function interface.

[0099] Note: The automatic controller 6 has a power-off memory function, allowing for long-term use after a single calibration. Replacing the pressure sensor 54 hardware may cause errors in pressure measurement; only in this case should a recalibration be performed. The pressure sensor 54 used in this device is a dual-purpose "tension / compression" type, with positive pressure and negative tension.

[0100] In this embodiment, the operation process for a single manual hammer strike is as follows:

[0101] Assemble the hammering mechanism: such as Figures 1-5 As shown, the lower frame 1, upper frame 2, hammering mechanism 3, clamping mechanism 4, and automatic controller 6 are assembled to make the device work in hammering mode.

[0102] Start the automatic controller 6: such as Figure 15 As shown, connect the first aviation connector 633 and the second aviation connector 634 on the rear panel 63 of the controller to the dual cables of the device respectively; connect the power input interface 636 on the rear panel 63 of the controller to 220V AC power through the power cord; turn on the power switch 635 on the rear panel 63; the touch screen 621 on the automatic controller 6 first displays the "system initialization interface", and after the system self-test is successful, it automatically enters the "main function selection interface"; select the "hammering mode" button in the "main function selection interface" to enter the "hammering mode interface".

[0103] Fine-tune the length of the transmission chain 35: Use the down arrow button in the "Manual Setting" window of the "Hammer Mode" interface to move the traction slider 38 down to its lowest position. At this point, the traction slider 38 should be in contact with the upper surface of the hammer 25, and the chain 35 should have a certain amount of travel. If the chain 35 is not long enough or too slack, the fixing pins 36 at both ends of the chain 35 can be adjusted to fine-tune the length of the chain 35.

[0104] Place the soil-filled culture box into the clamping platform 42: lift the upper frame force hammer 25 upwards a distance (this can be done manually or by activating the electromagnet 39 via the traction slider 38), and remove the buffer hammer 41 from the top of the clamping mechanism 4; shake the square handle 424 of the clamping platform to open the sample box clamping chamber; place the culture box 43 containing the soil sample into the clamping chamber from the top of the clamping platform 42, and shake the square handle 424 of the clamping platform to tightly clamp the four sides of the box, which can effectively disperse the instantaneous impact force during hammering while fixing the box and protecting the culture box; put the buffer hammer 41 back in place and slowly release the force hammer 25.

[0105] To start displacement detection: Click the "Start Detection" button in the "Detection Settings" window under "Hammer Mode Interface" to enable real-time displacement monitoring and start timing. The current time will be displayed in the text box in the "Detection Settings" window. Simultaneously, the "Real-time Displacement Detection" window will update the displacement-time curve in real-time (data update frequency is 5Hz) and display the current displacement data in the text box. At any time, the current time can be reset to zero using the "Time Zero" button in the "Detection Settings" window, and historical data of the displacement-time curve will be cleared. The "Displacement Zero" button in the "Real-time Displacement Detection" window can set the current position as the coordinate origin. Clicking the "Start Detection" button again will disable the displacement detection function.

[0106] Lowering the traction slider 38 to engage the force-applying hammer 25: Using the "down arrow" button in the "Manual Settings" window of the "Hammering Mode" interface, lower the traction slider 38 to directly above the force-applying hammer 25 and make it fit tightly. Click the "ON / OFF" button of the electromagnet control in the "Manual Settings" window to turn on the power of the electromagnet 39, so that the traction slider 38 and the force-applying hammer 25 engage with each other.

[0107] To set the zero point of displacement, click the "Displacement to Zero" button in the "Real-time Displacement" window.

[0108] Move the traction slider 38 up to the given height: Move the traction slider 38 up using the "Up Arrow" button in the "Manual Settings" window of the "Hammer Mode" interface. During this process, the "Current Displacement" text box in the "Real-time Displacement Detection" window dynamically displays the real-time displacement value of the upward-moving traction slider 38, and the "Displacement-Time" curve displays the historical change curve of the movement process; continuous upward movement can be achieved by pressing and holding the "Up Arrow" button, and releasing the button will stop the upward movement;

[0109] When the electromagnet 39 is de-energized, the force hammer 25 is released freely: Click the "ON / OFF" button of the electromagnet control in the "Manual Settings" window of the "Hammering Mode" interface. The electromagnet loses its magnetism and the force hammer 25 will fall freely along the double guide rails to strike the buffer hammer 41 on the culture box 43, completing a single manual hammering operation.

[0110] Repeat the above steps to perform multiple manual hammering operations, or remove the culture box after the operation is completed for later use.

[0111] In this embodiment, the operation process of the device performing multiple automatic hammer blows is as follows:

[0112] Follow the steps for a single manual hammering operation to complete the assembly of the hammering mechanism, start the automatic controller 6, fine-tune the transmission chain 35, and place the culture box.

[0113] Set the automatic operation parameters: In the "Automatic Operation Settings" window of the "Hammer Mode" interface, enter the "Displacement Value" (range 0.0-1000.0mm), which is the height of the hammer; "Number of Hammer Strikes" (range 0-1000); and "Single Strike Time" (range 0-1000s), which is the duration of a single hammer strike.

[0114] Refer to the displacement detection at the start of a single manual hammering operation;

[0115] Setting the zero point of displacement: Use the up and down arrow buttons in the "Manual Setting" window of the "Hammer Mode" interface to move the traction slider 38 to an appropriate position (approximately the middle of the entire stroke), and click the "Displacement Zero" button in the "Real-time Displacement" window to set the zero point of displacement.

[0116] Start and run multiple automatic hammering operations: Click the "Run" button in the "Automatic Operation Settings" window of the "Hammering Mode" interface to start automatic operation. The device operation process is as follows: Record the initial moment of the current hammering, de-energize the electromagnet 39, and move the traction slider 38 down to search for the force-applying hammer 25; after the traction slider 38 contacts the force-applying hammer 25, the displacement data will no longer change, indicating that the two are in close contact; energize the electromagnet 39 to attract the force-applying hammer 25, hold for 0.2s to wait for the attraction to stabilize, and record the initial displacement value at the same time; move the traction slider 38 up until the difference between the current position value and the initial displacement value is equal to the "Displacement Value" parameter entered in the "Automatic Operation Settings" window, stop moving up, wait for 0.2s, and then immediately turn off the electromagnet 39 to release the force-applying hammer 25; if the difference between the current moment and the initial moment is less than the "Single Time" parameter entered in the "Automatic Operation Settings" window, the current state remains unchanged until the "Single Time" timer is completed, and the above process is repeated to enter the next hammering, while the "Number of Hammerings" parameter is decremented by 1;

[0117] When the "number of hammer blows" parameter is reduced to zero, the electromagnet 39 is de-energized, the traction slider 38 moves to the origin position, and the entire automatic hammering operation is completed. In particular, the operation can be paused at any time during the operation by clicking the "Pause" button in the "Automatic Operation Settings" window, and the operation can be resumed by clicking the "Run" button again, or the operation can be ended in advance by clicking the reset button 622.

[0118] The operating procedure for the device in static pressure mode in this embodiment is as follows:

[0119] Assemble the static pressure mechanism (5): according to Figures 6-10 As shown, the lower frame 1, upper frame 2, clamping mechanism 4, static pressure mechanism 5, and automatic controller 6 are assembled so that the device operates in static pressure mode.

[0120] Start the automatic controller (6): Connect the circuit according to the operation steps of a single manual hammering; after the controller system is initialized, select the "static pressure mode" button in the "main function selection interface" to enter the "static pressure mode interface".

[0121] Placement of culture box 43: Follow the steps of manual hammering for a single operation to place culture box 43.

[0122] Set the static pressure operating parameters: In the "Running Settings" window of the "Static Pressure Mode Interface", enter the "Displacement Threshold" parameter (0-1000mm, used to limit the maximum position value of the static pressure electric actuator 53), the "Pressure Threshold" parameter (0-600kgf, i.e. the static pressure stability value), and the "Holding Time" parameter (0-10000s).

[0123] To start displacement and pressure detection: Click the "Start Detection" button in the "General Settings" window under "Static Pressure Mode Interface" to enable real-time displacement and pressure monitoring and start timing. The current time will be displayed in the text box in the "General Settings" window. Simultaneously, the "Real-time Displacement Detection" window will update the displacement-time curve in real-time (data update frequency of 5Hz) and display the current displacement data in the text box; the "Real-time Pressure Detection" window will update the pressure-time curve in real-time (data update frequency of 5Hz) and display the current pressure data in the text box. At any time, the "Time Zeroing" button in the "General Settings" window can be used to reset the current time and clear the historical data of the displacement-time curve and pressure-time curve. The "Displacement Zeroing" button in the "Real-time Displacement Detection" window can set the current position as the coordinate origin; the "Pressure Zeroing" button in the "Real-time Pressure Detection" window can set the current pressure (tension) as the pressure origin. Clicking the "Start Detection" button again will disable the displacement and pressure detection function.

[0124] Move the static pressure electric actuator 53 and set the displacement and pressure origin: Click the "up and down arrow" button in the "General Settings" window to move the static pressure electric actuator 53 so that the front section of the hydraulic damping rod 56 is just in contact with the top of the force hammer 25; click the "Displacement to Zero" button in the "Real-time Displacement Detection" window and the "Pressure to Zero" button in the "Real-time Pressure Detection" window respectively to set the displacement and pressure origin.

[0125] To start and run the static pressure operation: Click the "Run" button in the "Run Settings" window of the "Static Pressure Mode" interface to begin automatic operation. The device operation process is as follows:

[0126] The static pressure electric actuator 53 starts to slowly advance downwards. The actuator head, along with the pressure sensor 54, positioning plate 55, and hydraulic damping rod 56, moves down synchronously and applies pressure to the force hammer 25. The pressure is transmitted to the soil sample in the culture box 43 through the force hammer 25 and the buffer hammer 41. As the pressure advances, the pressure value increases continuously. When the pressure value equals the "pressure threshold" parameter, the pressure is stopped and the timing starts. The controller will dynamically fine-tune the pressure depth according to the PID algorithm to maintain a constant pressure value.

[0127] End of static pressure operation: When the timing duration equals the "holding time" parameter or the downward displacement is greater than the "displacement threshold" parameter, the static pressure electric actuator 53 returns to the original position, ending the current static pressure operation, and the culture box 43 is taken out for later use.

[0128] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0129] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A compacted soil preparation device, characterized in that, It has two working modes: hammering and static pressure, including a support frame, a clamping mechanism (4), an automatic controller (6), a hammering mechanism (3), and a static pressure mechanism (5). The clamping mechanism (4) is disposed at the bottom of the support frame. The clamping mechanism (4) is provided with a clamping chamber for holding the culture box (43). The automatic controller (6) is connected to the hammering mechanism (3) and the static pressure mechanism (5) respectively. In the hammering mode, the hammering mechanism (3) is arranged on the top of the support frame and directly above the culture box (43), and the hammering mechanism (3) is capable of hammering the soil in the culture box (43); In static pressure mode, the static pressure mechanism (5) is arranged on the top of the support frame and directly above the culture box (43), and the static pressure mechanism (5) is capable of static pressure operation on the soil in the culture box (43); The clamping mechanism (4) includes a buffer hammer (41) and a clamping platform (42). The buffer hammer (41) includes a buffer hammer guide column (411), a buffer hammer pad (412), and a buffer hammer column (413). The support frame has a slide rail optical shaft (24) and a force-applying hammer (25). The hammering mechanism (3) includes a traction motor bracket (31), a first pull wire displacement sensor (32), a traction electric push rod (33), a sprocket (34), a chain (35), a traction slider (38), and an electromagnet (39). The static pressure mechanism (5) includes a middle crossbeam (51), a second pull wire displacement sensor (52), a static pressure electric push rod (53), a pressure sensor (54), a positioning plate (55), and a hydraulic damping rod (56).

2. The compacted soil preparation device according to claim 1, characterized in that, The support frame includes an upper frame (2) and a lower frame (1). The upper frame (2) is detachably disposed above the lower frame (1). In the hammering mode, the hammering mechanism (3) is disposed on the upper frame (2). In static pressure mode, the static pressure mechanism (5) is disposed on the upper frame (2).

3. The compacted soil preparation device according to claim 1, characterized in that, The clamping chamber is located inside the clamping platform (42), and the buffer hammer (41) is arranged between the culture box (43) and the hammering mechanism (3); or the buffer hammer (41) is arranged between the culture box (43) and the static pressure mechanism (5).

4. The compacted soil preparation device according to claim 3, characterized in that, The lower end of the buffer hammer guide post (411) is disposed on the clamping platform (42), the upper end of the buffer hammer guide post (411) passes through the buffer hammer pad (412), and the upper end of the buffer hammer post (413) is fixed on the buffer hammer pad (412). When the buffer hammer pad (412) is subjected to downward force, the buffer hammer pad (412) can drive the buffer hammer post (413) to perform a hammering motion in the culture box (43) under the guidance of the buffer hammer guide post (411).

5. The compacted soil preparation device according to claim 4, characterized in that, The clamping platform (42) includes a perforated top plate (421), a U-shaped fixed column (422), a screw (423), a handle (424), a clamping steel plate (425), a guide rod (426), and a perforated bottom plate (427). The perforated top plate (421) is arranged at the upper end of the U-shaped fixed column (422), and the perforated bottom plate (427) is arranged at the lower end of the U-shaped fixed column (422). There are four U-shaped fixed columns (422). Each U-shaped fixed column (422) is equipped with a screw (423) and is threadedly engaged with the screw (423). The inner end of the screw (423) is connected to the clamping steel plate (425), and the outer end of the screw (423) is equipped with a handle (424). The space enclosed by the four clamping steel plates (425) and the porous base plate (427) forms the clamping chamber.

6. The compacted soil preparation device according to claim 5, characterized in that, The traction motor bracket (31) is detachably configured on the top of the support frame. The traction slider (38) is mounted on the slide rail shaft (24) and the electromagnet (39) is provided at the bottom. One end of the chain (35) is provided on one side of the traction motor bracket (31). The other end of the chain (35) first extends downward and wraps around the bottom of the sprocket (34), then extends upward and wraps around the top of the pulley arranged on the other side of the traction motor bracket (31), and then extends downward to connect with the top of the traction slider (38). The top of the first pull wire displacement sensor (32) is connected to the top of the support frame, and the bottom is connected to the traction slider (38). The top end of the traction electric push rod (33) is connected to the traction motor bracket (31), and the bottom end of the traction electric push rod (33) is driven to connect to the sprocket (34). When the traction electric push rod (33) extends or shortens, it can drive the traction slider (38) to rise or fall through the chain (35).

7. The compacted soil preparation device according to claim 1, characterized in that, The middle crossbeam (51) is detachably mounted on the top of the support frame. The top of the hydrostatic electric actuator (53) is mounted on the middle crossbeam (51). The bottom of the hydrostatic electric actuator (53) is connected to the force hammer (25) via a hydraulic damping rod (56). The pressure sensor (54) is arranged between the hydraulic damping rod (56) and the hydrostatic electric actuator (53). The positioning plate (55) is mounted on the top of the hydraulic damping rod (56). The top and bottom of the second pull wire displacement sensor (52) are connected to the middle crossbeam (51) and the positioning plate (55) respectively.

8. A displacement calibration method for a compacted soil preparation device, characterized in that, The compacted soil preparation apparatus according to any one of claims 1 to 7 comprises the following steps: S1: Enter the displacement calibration software interface, connect the power supply of the automatic controller (6) and turn on the power switch (635), wait for the system initialization to be completed and then enter the "main function selection interface"; select "static pressure mode" to enter the static pressure mode interface, select the "displacement calibration" button in the "real-time displacement detection" window of the static pressure mode interface, or select "hammering mode" to enter the hammering mode interface, select the "displacement calibration" button in the "real-time displacement detection" window of the hammering mode interface; S2: Manually remove the positioning end of the first pull wire displacement sensor (32) or the second pull wire displacement sensor (52), pull it along the pull wire direction to any fixed position 1 and keep it unchanged; in the "Step 1" window of the displacement calibration software interface, select the "Set Position 1" input box and fill in the data "0"; click the "Acquire Position 1 Signal" button in the "Step 1" window, and the differential voltage signal of the first pull wire displacement sensor (32) or the second pull wire displacement sensor (52) corresponding to position 1 will be automatically filled into the "Position 1 Signal" text box; S3: Manually pull the positioning end of the first pull wire displacement sensor (32) or the second pull wire displacement sensor (52) along the pull wire direction to any fixed position 2 and keep it unchanged, wherein the displacement of position 2 is greater than the displacement of position 1; measure the distance between position 1 and position 2; select the "Set Position 2" input box in the "Second Step" window of the displacement calibration software interface and fill in the measured distance; click the "Acquire Position 2 Signal" button in the "Second Step" window, and the differential voltage signal of the first pull wire displacement sensor (32) or the second pull wire displacement sensor (52) corresponding to position 2 will be automatically filled into the "Position 2 Signal" text box; S4: Select the "Displacement Calibration" button, and the system will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box.

9. A pressure calibration method for a compacted soil preparation device, characterized in that, The compacted soil preparation apparatus according to any one of claims 1 to 7 comprises the following steps: M1: Enter the pressure calibration software interface, connect the power supply of the automatic controller (6) and turn on the power switch (635); wait for the system initialization to be completed and enter the "main function selection interface"; select "static pressure mode" to enter the static pressure mode interface; in the "real-time pressure detection" window of the static pressure mode interface, select the "pressure calibration" button; M2: Suspend two standard weights on the hydraulic buffer (56) below the pressure sensor (54), select the "Set Pressure 1" input box in the "First Step" window of the pressure calibration software interface, and fill in the data "0"; click the "Acquire Pressure 1 Signal" button in the "First Step" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 1 will be automatically filled into the "Pressure 1 Signal" text box. M3: Remove the next weight, and the pulling force will be the weight of the single weight. In the "Second Step" window of the pressure calibration software interface, select the "Set Pressure 2" input box and fill in the data of the weight of the single weight. Click the "Acquire Pressure 2 Signal" button in the "Second Step" window, and the differential voltage signal of the pressure sensor corresponding to Pressure 2 will be automatically filled into the "Pressure 2 Signal" text box. M4: Select the "Pressure Calibration" button, and the system will automatically calculate the "Current Signal Proportional Parameter" value and display the result in the corresponding text box.

10. The displacement calibration method according to claim 8 or the pressure calibration method according to claim 9, characterized in that, The automatic controller (6) shown has a power-off memory function, and can be used for a long time after a single calibration; If replacing the hardware of the second wire displacement sensor (52) may cause errors in displacement measurement, a re-displacement calibration is required; or if replacing the hardware of the pressure sensor (54) may cause errors in pressure measurement, a re-pressure calibration is required.

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