Compacted soil preparation device and displacement and pressure calibration method thereof

Abstract

The invention relates to the field of botany research, and provides a compacted soil preparation device and a displacement and pressure calibration method thereof.The compacted soil preparation device has a hammering working mode and a static pressure working mode 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 and used for containing a culture box, and the automatic controller is in signal connection with the hammering mechanism and the static pressure mechanism. Compacted soil can be prepared in the root box, two different compaction modes of hammering compaction and static compaction are provided to simulate compaction conditions of the soil, quantitative characterization is performed at the same time, more controllable and accurate experiment conditions are provided for research on response of plant root systems to the compacted soil, and the application prospect is wide. And crop growth environment optimization and related research of agricultural production are expected to be promoted.

Description

Technical Field

[0001] The invention relates to the field of botanical research, and in particular to a compacted soil preparation device and a displacement and pressure calibration method thereof. Background Art

[0002] In the field of botany, studying the phenotype of crop roots is very critical. The root system of a plant provides support for the plant and is the organ through which the plant absorbs soil water and nutrients. It can affect the yield to a certain extent, and can sense the environment, 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 also helpful for crop drought resistance. Therefore, the interaction between the root system and the soil is crucial to increasing crop yields and improving the ability of crops to adapt to changing soil environments.

[0003] The root system of plants is highly plastic. Differences in water, mineral nutrition, microorganisms, soil permeability, etc. will cause changes in the root system configuration. The soil environment is very complex. Soil is a three-phase mixture of solid, liquid, and gas. Its solid clay particles form a unique soil aggregate structure to produce interconnected pores of varying sizes in the soil, which are filled with water and gas. Even for the same piece of land, the soil properties may vary greatly due to different locations and depths.

[0004] Obtaining root phenotypes in the laboratory through potted plants is one of the most promising root phenotyping techniques. It allows plants to grow in a soil environment similar to that of the field, and can make full use of the controllable climate of the smart greenhouse. In addition, potted plants reduce the difficulty of root sampling. However, due to the strong heterogeneity of the soil and the high plasticity of the root system, root phenotype differences caused by soil inhomogeneity are prone to occur between potted plants. In order to distinguish whether the phenotypic changes are caused by the soil or the experimental treatment, a very large number of repetitions are required to obtain statistical differences. This will consume a lot of manpower and material resources.

[0005] Soil porosity is an important indicator of soil. Its change can change the solid-liquid-gas environment of the soil, which can affect the root development, respiration and nutrient absorption of crops. It can also change the rhizosphere microbial community. In order to control the consistency of soil between potted plants, it is easy to choose the same texture soil with the same particle size and fill it with the same porosity.

[0006] Preparing soil with consistent compaction in different plant culture devices is necessary to study the root response of crops in a simulated actual growth environment. Existing soil compaction devices are usually used in industry and cannot be adapted to plant culture containers. Pre-compacted soil samples cannot be placed in culture containers while maintaining compaction. This limits in-depth research on root responses. In a laboratory environment, preparing compacted soil requires ensuring that the compaction is uniform and repeatable to obtain reliable experimental results. However, there is currently no device that has both free fall (hammer) compaction and static compaction modes and can be operated in a culture box. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a compacted soil preparation device and a displacement and pressure calibration method thereof.

[0008] A compacted soil preparation device provided according to the present invention has two working modes: hammering and static pressure, and includes 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, a clamping bin is arranged in the clamping mechanism, the clamping bin is used to hold the culture box, and the automatic controller is respectively connected with the hammer mechanism and the static pressure mechanism by signal;

[0010] In the hammering mode, the hammering mechanism is arranged on the top of the support frame and is located directly above the culture box, and the hammering mechanism can perform a hammering operation on the soil in the culture box;

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

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

[0013] Preferably, the clamping mechanism comprises a buffer hammer and a clamping platform, the clamping bin is located inside the clamping platform, and the buffer hammer is arranged between the culture box and the hammering mechanism; or the buffer hammer is arranged between the culture box and the static pressure mechanism.

[0014] Preferably, the buffer hammer includes 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 passes through the buffer hammer pad, and the upper end of the buffer hammer column is fixed on the buffer hammer pad. When force is applied downward to the buffer hammer pad, the buffer hammer pad can drive the buffer hammer column to perform hammering movement into the culture box under the guidance of the buffer hammer guide column.

[0015] Preferably, the clamping platform comprises a porous top plate, a circular fixed column, a screw, a handle, a clamping steel plate, a guide rod, and a porous bottom plate, wherein the porous top plate is arranged at the upper end of the circular fixed column, and the porous bottom plate is arranged at the lower end of the circular fixed column;

[0016] There are four circular fixed columns, each of which is equipped with a screw and cooperates with the screw thread. The inner end of the screw is connected to the clamping steel plate, and the outer end of the screw is equipped with a handle. The space enclosed by the four clamping steel plates and the porous bottom plate forms the clamping bin.

[0017] Preferably, the support frame is provided with a slide rail optical axis and a force-applying hammer, and the hammer mechanism comprises a traction motor bracket, a first pull-wire displacement sensor, a traction electric push rod, a sprocket, a chain, a traction slider and an electromagnet;

[0018] The traction motor bracket is detachably arranged at the top of the support frame, the traction slider is sleeved on the slide rail optical axis and the electromagnet is arranged at the bottom, one end of the chain is arranged at one side of the traction motor bracket, the other end of the chain first extends downward to wrap around the bottom end of the sprocket and then extends upward to wrap around the top end of the pulley arranged on the other side of the traction motor bracket and then extends downward to connect with the top of the traction slider, the top end of the first pull-wire displacement sensor is connected to the top end of the support frame, and the bottom end is connected to the traction slider;

[0019] The top end of the traction electric push rod is connected to the traction motor bracket, and the bottom end of the traction electric push rod is drivingly connected to the sprocket. When the traction electric push rod is extended or shortened, the traction slider can be driven to rise or fall through the chain.

[0020] Preferably, the support frame is provided with a slide rail optical 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 hydrostatic electric push rod is arranged on the middle cross beam, the bottom of the hydrostatic electric push rod is connected to the force hammer through the hydraulic damping rod, the pressure sensor is arranged between the hydraulic damping rod and the hydrostatic electric push rod, the positioning plate is arranged on the top of the hydraulic damping rod, and the top and bottom ends of the second pull-wire displacement sensor are respectively connected to the middle cross beam and the positioning plate.

[0022] A displacement calibration method for a compacted soil preparation device provided by the present invention comprises the following steps:

[0023] S1: Enter the displacement calibration software interface, connect the power 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, 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;

[0024] S2: Manually remove the positioning end of the first wire displacement sensor or the second wire displacement sensor, pull it to any fixed position 1 along the wire pulling direction and keep it unchanged; select the "Set Position 1" input box in the "First Step" window of the displacement calibration software interface, and fill in the data "0"; click the "Collect Position 1 Signal" button in the "First Step" window, and the differential voltage signal of the first wire displacement sensor or the second wire displacement sensor corresponding to position 1 is automatically filled in the "Position 1 Signal" text box;

[0025] S3: Manually pull the positioning end of the first wire displacement sensor or the second wire displacement sensor along the wire pulling 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 "Collect position 2 signal" button in the "Second step" window, and the differential voltage signal of the first wire displacement sensor or the second wire displacement sensor corresponding to position 2 is automatically filled in the "Position 2 signal" text box;

[0026] S4: Select the "Displacement Calibration" button, the system will automatically calculate the "Current Signal Scale Parameter" value and display the result in the corresponding text box.

[0027] A pressure calibration method for a compacted soil preparation device provided by the present invention comprises the following steps:

[0028] M1: Enter the pressure calibration software interface, connect the power 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; select the "pressure calibration" button in the "real-time pressure detection" window in the static pressure mode interface;

[0029] M2: Hang two standard weights on the hydraulic buffer below the pressure sensor, 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 "Collect 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 in the "Pressure 1 Signal" text box;

[0030] M3: Take down a weight, then the pulling force is the weight of a single weight; select the "Set Pressure 2" input box in the "Step 2" window of the pressure calibration software interface, and fill in the data of the single weight weight; click the "Collect 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 in the "Pressure 2 Signal" text box;

[0031] M4: Select the "Pressure Calibration" button, 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 has a power-off memory function, and can be used for a long time after calibration once;

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

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

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

[0036] 2. The present invention ensures the consistency of the pressure applied to the soil through a correction system, thereby ensuring the accuracy of soil compaction and solving the problems of compaction uniformity and repeatability in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0042] Figure 5 A rendering of the present invention in hammer mode;

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

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

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

[0046] Fig. 9 It is a schematic diagram of the side structure of the present invention in static pressure mode;

[0047] Fig.10 A rendering of the present invention in static pressure mode;

[0048] Fig.11 is a schematic diagram of the three-dimensional structure of the clamping mechanism;

[0049] Fig.12 It is a schematic diagram of the structure of the clamping mechanism from top view;

[0050] Fig.13 It is a front structural schematic diagram of the clamping mechanism;

[0051] Fig.14 It is a schematic diagram of the side structure of the clamping mechanism;

[0052] Fig.15 It is a schematic diagram of the three-view structure of the automatic controller;

[0053] Fig.16 It is the software function interface diagram of the present invention.

[0054] The figure shows:

[0055] 1-lower frame; 11-upper frame connection hole; 12-lower frame column; 13-bottom plate;

[0056] 2-upper frame; 21-upper crossbeam; 22-upper frame column; 23-crossbeam adjustment positioning hole; 24-slide rail optical axis; 25-force hammer; 251-force hammer slide plate; 252-force hammer linear bearing; 253-force hammer column; 26-optical axis fixing nut; 27-lower crossbeam;

[0057] 3- hammer 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 column; 412-buffer hammer pad; 413-buffer hammer column; 42-clamping table; 421-porous top plate; 422-circular fixed column; 423-screw; 424-handle; 425-clamping steel plate; 426-guide rod; 427-porous bottom plate; 43-culture box;

[0059] 5-static pressure mechanism; 51-middle cross beam; 52-pull wire displacement sensor; 53-static pressure electric push rod; 54-pressure sensor; 55-positioning plate; 56-hydraulic damping rod;

[0060] 6-automatic controller; 61-controller chassis; 611-heat dissipation holes; 612-chassis 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 plug terminal; 634-second aviation plug terminal; 635-power switch; 636-power input interface. DETAILED DESCRIPTION

[0061] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0062] Embodiment 1:

[0063] The present invention provides a compacted soil preparation device, which has two working modes: hammering and static pressure. The device 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 arranged at the bottom of the support frame. A clamping bin is provided in the clamping mechanism 4. The clamping bin is used to hold a culture box 43. The automatic controller 6 is respectively connected to the hammering mechanism 3 and the static pressure mechanism 5 by signals. The automatic controller 6 can control the hammering mechanism 3 to perform hammering operation, or control the static pressure mechanism 5 to perform static pressure operation.

[0064] Specifically, in the hammering mode, the hammering mechanism 3 is arranged at the top of the support frame and is located 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 arranged at the top of the support frame and is located 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 hammer mode, the hammer 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 Figure 1 to Figure 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 connecting hole 11 and an ear plate. The upper frame connecting hole 11 and the ear plate can be connected to the upper frame 2 through a connecting piece. The connecting piece can be a screw or the like to achieve the fixation of the upper frame 2 and the lower frame 1.

[0067] like Figure 1 to Figure 5As shown, the upper frame 2 includes an upper crossbeam 21, an upper frame column 22, a crossbeam adjustment positioning hole 23, a slide rail optical axis 24, a force hammer 25, an optical axis fixing nut 26, and a lower crossbeam 27. The number of the upper frame columns 22 is two, and 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 column 22 is provided with a plurality of crossbeam adjustment positioning holes 23, which can be used to adjust the height at which the upper crossbeam 21 is fixed on the upper frame column 22. The upper end of the slide rail optical axis 24 is detachably fixed to the upper crossbeam 21 by an optical axis fixing nut 26, and the lower end of the slide rail optical axis 24 is detachably fixed to the lower crossbeam 27 by an optical axis fixing nut 26. The force-applying hammer 25 includes a force-applying hammer slide plate 251, a force-applying hammer linear bearing 252, and a force-applying hammer column 253. The top end of the force-applying hammer column 253 is fixed on the force-applying hammer slide plate 251, and the bottom end of the force-applying hammer column 253 passes through the lower cross beam 27 and extends to the clamping mechanism 4, wherein the two ends of the force-applying hammer slide plate 251 are respectively slidably matched with the two slide rail optical axes 24 through the force-applying hammer linear bearings 252, and the force-applying hammer slide plate 251 can slide up and down under the drive of the hammer mechanism 3 or the static pressure mechanism 5.

[0068] like Figure 1 to Figure 5 , Figure 11 to Figure 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, and the buffer hammer 41 is arranged between the culture box 43 and the hammer 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 column 411, a buffer hammer pad 412, and a buffer hammer column 413. The lower end of the buffer hammer guide column 411 is arranged on the clamping platform 42, and the upper end of the buffer hammer guide column 411 penetrates the buffer hammer pad 412 to guide the buffer hammer pad 412 to move up and down. The upper end of the buffer hammer column 413 is fixed on the buffer hammer pad 412. When the buffer hammer pad 412 is forced downward, the buffer hammer pad 412 can drive the buffer hammer column 413 to perform hammering movement in the culture box 43 under the guidance of the buffer hammer guide column 411. Among them, the force-applying component of the buffer hammer pad 412 is the force-applying hammer column 253.

[0069] like Figure 1 to Figure 5 , Figure 11 to Figure 14As shown, the clamping platform 42 includes a porous top plate 421, a circular fixed column 422, a screw 423, a handle 424, a clamping steel plate 425, a guide rod 426, and a porous bottom plate 427. The porous top plate 421 is arranged at the upper end of the circular fixed column 422, and the porous bottom plate 427 is arranged at the lower end of the circular fixed column 422. The number of the circular fixed columns 422 is 4, and each circular fixed column 422 is equipped with a screw 423 and is threadedly matched with the screw 423. The inner end of the screw rod 423 is connected to the clamping steel plate 425, and the outer end of the screw rod 423 is provided with a handle 424. The space enclosed by the four clamping steel plates 425 and the porous bottom plate 427 forms a clamping chamber. The culture box 43 can be fixed by driving the four clamping steel plates 425 toward the center. The outer end of the guide rod 426 is fixed on the circular fixed column 422, and the inner end of the guide rod 426 passes through the clamping steel plate 425. The guide rod 426 provides guidance when the clamping steel plate 425 moves.

[0070] like Figure 1 to Figure 5 As shown, the support frame is provided with a slide rail optical axis 24 and a force-applying hammer 25, the force-applying hammer 25 is used for hammering operation, the hammering mechanism 3 includes a traction motor bracket 31, a first 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 configured on the upper crossbeam 21, the traction slider 38 is sleeved on the slide rail optical axis 24 and an electromagnet 39 is arranged at the bottom, the electromagnet 39 realizes magnetic force control by controlling the on and off of power, and the magnetic force attracts the force-applying hammer slide plate 251 so that The force-applying hammer slide plate 251 is connected to the electromagnet 39, or the power is turned off to control that there is no magnetic attraction between the force-applying hammer slide plate 251 and the electromagnet 39, and then they can be separated. One end of the chain 35 is arranged on one side of the traction motor bracket 31, and the other end of the chain 35 first extends downward to wrap around the bottom end of the sprocket 34 for half a circle, then extends upward to wrap around the top half a circle 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 end of the first pull-wire displacement sensor 32 is connected to the upper crossbeam 21, and the bottom end 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 drivingly connected to the sprocket 34. When the traction electric push rod 33 is extended or shortened, the traction slider 38 can be driven 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 rising or falling.

[0071] like Figure 6 to Figure 10As shown, the support frame is provided with a slide rail optical axis 24 and a force-applying hammer 25, the force-applying hammer 25 is used for static pressure operation, the static pressure mechanism 5 comprises a middle cross beam 51, a second 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, the middle cross beam 51 is detachably arranged on the two upper frame columns 22 and is located below the upper cross beam 21, the top of the static pressure electric push rod 53 is arranged on the middle cross beam 51, and the bottom of the static pressure electric push rod 53 is connected to the force-applying hammer 25 through the hydraulic damping rod 56, and the pressure sensor The sensor 54 is arranged between the hydraulic damping rod 56 and the hydrostatic electric push rod 53, and the positioning plate 55 is configured on one side of the top end of the hydraulic damping rod 56. The top and bottom ends of the second pull-wire displacement sensor 52 are respectively connected to the middle cross beam 51 and the positioning plate 55. When the hydrostatic electric push rod 53 is extended, it can drive the hydraulic damping rod 56 to move downward and then drive the force hammer 25 downward to perform hydrostatic operation. At this time, the positioning plate 55 synchronously follows the hydraulic damping rod 56 to move downward, and the second pull-wire displacement sensor 52 can detect the displacement of the force hammer 25 moving downward.

[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 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, 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 wire displacement sensor 32 or the second wire displacement sensor 52, pull it to any fixed position 1 along the wire pulling direction and keep it unchanged; select the "Set Position 1" input box in the "First Step" window of the displacement calibration software interface, and fill in the data "0"; click the "Collect 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 is automatically filled in 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 pulling 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 "Collect 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 is automatically filled in the "Position 2 signal" text box;

[0076] S4: Select the "Displacement Calibration" button, the system will automatically calculate the "Current Signal Scale 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 being calibrated once. When the replacement of the hardware of the first pull-wire displacement sensor 32 or the second pull-wire displacement sensor 52 may cause errors in displacement measurement, a new displacement calibration 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 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; select the "pressure calibration" button in the "real-time pressure detection" window in the static pressure mode interface;

[0080] M2: Hang two standard weights on the hydraulic damping rod 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 "Collect 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 in the "Pressure 1 Signal" text box;

[0081] M3: Take down a weight, then the pulling force is the weight of a single weight; select the "Set Pressure 2" input box in the "Step 2" window of the pressure calibration software interface, and fill in the data of the single weight weight; click the "Collect 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 in the "Pressure 2 Signal" text box;

[0082] M4: Select the "Pressure Calibration" button, 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 being calibrated once; when replacing the pressure sensor 54 hardware may cause errors in pressure measurement, a re-pressure calibration is required.

[0084] Embodiment 2:

[0085] This embodiment is a preferred example of embodiment 1. The compacted soil preparation device in this embodiment adopts a modular design as a whole, and can realize two different working modes of hammering and static pressure. The mechanical structures corresponding to the two modes of hammering and static pressure share the same clamping mechanism 4, such as Figure 11 to Figure 14 As shown; the automatic controller 6 is connected to the hammer mechanism and the static pressure mechanism through dual cables. The software system in the automatic controller 6 includes a main control board embedded program, which is responsible for the underlying drive of each functional module. The automatic controller 6 also includes a touch screen human-computer interaction interface program for setting working parameters, performing real-time control and displaying status information. The entire functional interface is as shown in FIG. Fig.16 shown.

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

[0087] Enter the displacement calibration software interface, turn on the power of the automatic controller 6, connect the dual communication cables, 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, or select "hammer mode" to enter the hammer mode interface; select the "displacement calibration" button in the "real-time displacement detection" window of the static pressure mode interface, or select the "displacement calibration" button in the "real-time displacement detection" window of the hammer mode interface;

[0088] Operation of the "first step" of displacement calibration: manually remove the positioning end of the first wire displacement sensor 32 or the second wire displacement sensor 52, pull it to any fixed position 1 along the wire pulling direction and keep it unchanged; select the "Set position 1" input box in the "first step" window of the displacement calibration software interface, and fill in the data "0", that is, select the fixed position 1 as the reference origin; click the "Collect 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 in the "position 1 signal" text box;

[0089] Operation of the "second step" of displacement calibration: manually pull the positioning end of the first wire displacement sensor 32 or the second wire displacement sensor 52 along the wire pulling direction to any fixed position 2 and keep it unchanged (the displacement of position 2 is required to be greater than the displacement of position 1); use a ruler tool to measure the distance between position 1 and position 2, taking the measurement result of "100.0mm" as an example; select the "Set Position 2" input box in the "Second Step" window of the displacement calibration software interface, and fill in the data "100.0"; click the "Collect 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 is automatically filled in the "Position 2 Signal" text box;

[0090] Select the "Displacement Calibration" button, the system will automatically calculate the "Current Signal Scale Parameter" value and display the result in the corresponding text box. The unit is 10 -4 mm / uV;

[0091] After the displacement calibration is completed, select the "Back" button to return to the previous function interface.

[0092] Note: the automatic controller 6 has a power-off memory function, and can be used for a long time after calibration. Replacing the hardware of the second wire displacement sensor 52 may cause errors in displacement measurement, and only then does it need to be recalibrated.

[0093] The operation flow of the device for pressure calibration in this embodiment is as follows (pressure calibration is only completed in static pressure mode):

[0094] Enter the software interface of the pressure calibration. Turn on the power of the automatic controller 6, connect the dual communication cables, 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; select the "pressure calibration" button in the "real-time pressure detection" window in the static pressure mode interface;

[0095] Operation of the "first step" of pressure calibration: hang two standard weights on the hydraulic damping rod 56 below the pressure sensor 54, taking the standard weight of 1.0 kg as an example; select the "Set Pressure 1" input box in the "first step" window of the pressure calibration software interface, and fill in the data "0", that is, select the current pressure (tension) force as the reference origin; click the "Collect 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 in the "Pressure 1 Signal" text box;

[0096] Operation of the "Second Step" of pressure calibration: take down a weight, then the pulling force is the weight of a single weight; select the "Set Pressure 2" input box in the "Second Step" window of the pressure calibration software interface, and fill in the data "1.0"; click the "Collect 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 in the "Pressure 2 Signal" text box;

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

[0098] After the pressure calibration is completed, select the "Back" button to return to the previous function interface.

[0099] Note: The automatic controller 6 has a power-off memory function, and can be used for a long time after calibration once. Replacing the hardware of the pressure sensor 54 may cause errors in pressure measurement, and only then does it need to be recalibrated; the pressure sensor 54 used in this device is a "pull / compression" dual-purpose type, with pressure being positive and tension being negative.

[0100] The operation process of the device performing a single manual hammering in this embodiment is as follows:

[0101] Assemble the hammer mechanism: Figures 1 to 5 As shown, the lower frame 1, the upper frame 2, the hammer mechanism 3, the clamping mechanism 4, and the automatic controller 6 are assembled so that the device works in the hammer mode;

[0102] Start the automatic controller 6: Fig.15 As shown, the first aviation plug terminal 633 and the second aviation plug terminal 634 on the rear panel 63 of the controller are respectively connected to the dual cables of the device; the power input interface 636 on the rear panel 63 of the controller is connected to the 220V AC power through the power cord; the power switch 635 on the rear panel 63 is turned on; the touch LCD screen 621 on the automatic controller 6 first displays the "system initialization interface", and then automatically enters the "main function selection interface" after waiting for the system self-check to be correct; select the "hammer mode" button in the "main function selection interface" to enter the "hammer mode interface".

[0103] Fine-tune the length of the transmission chain 35 appropriately: Use the "down arrow" button in the "manual setting" window in the "hammering mode" interface to control the traction slider 38 to move downward to the lowest position. At this time, the traction slider 38 should be able to contact the upper surface of the force-applying hammer 25, and the chain 35 has a certain amount of travel margin. If the chain 35 is not long enough or too loose, the fixing pins 36 at both ends of the chain 35 can be adjusted to fine-tune the length of the chain 35;

[0104] Put the culture box containing soil into the clamping table 42: lift the upper frame force hammer 25 upward for a distance (manual operation can be performed, or the electromagnet 39 can be turned on by pulling the slider 38 to pull it up), and remove the buffer hammer 41 on the top of the clamping mechanism 4; shake the square handle 424 of the clamping table to open the sample box clamping compartment; put the culture box 43 containing soil specimens into the clamping compartment from the top of the clamping table 42, and shake the square handle 424 of the clamping table to tightly clamp the four sides of the box body, which can effectively disperse the instantaneous impact force during hammering while fixing the box body, thereby protecting the culture box; put the buffer hammer 41 back to its original position, and slowly release the force hammer 25;

[0105] Start displacement detection: Click the "Start Detection" button in the "Hammer Mode Interface" - "Detection Settings" window to start real-time displacement monitoring and start timing. The current time is displayed in the text box in the "Detection Settings" window. At the same time, 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 "Time Reset" button in the "Detection Settings" window can be used to reset the current time and clear the historical data of the displacement-time curve; the "Displacement Reset" button in the "Real-time Displacement Detection" window can set the current position as the coordinate origin; click the "Start Detection" button again to turn off the displacement detection function;

[0106] Move the traction slider 38 downward to attract the force-applying hammer 25: Use the "down arrow" button in the "manual setting" window in the "hammering mode" interface to move the traction slider 38 downward to the top of the force-applying hammer 25 and fit it tightly. Click the electromagnet control "ON / OFF" button in the "manual setting" window to turn on the power of the electromagnet 39, so that the traction slider 38 and the force-applying hammer 25 attract each other;

[0107] Set the displacement zero point: Click the "Displacement Zero" button in the "Real-time Displacement" window to set the displacement zero point;

[0108] Move the traction slider 38 upward to a given height: Use the "up arrow" button in the "manual setting" window in the "hammering mode" interface to move the traction slider 38 upward. 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 traction slider 38, and the "displacement-time" curve displays the historical change curve of the moving process; continuous upward movement can be achieved by long pressing the "up arrow" button, and the upward movement can be stopped by releasing the button;

[0109] The electromagnet 39 is powered off, and the force-applying hammer 25 is released freely: click the electromagnet control "ON / OFF" button in the "Manual Setting" window in the "Hammering Mode" interface, the electromagnet is powered off and loses its magnetism, and the force-applying hammer 25 will fall freely along the double guide rails and hit the buffer hammer 41 on the culture box 43, completing a single manual hammering operation;

[0110] Repeat the above operation to perform multiple manual hammering operations, or take out the culture box body for use after the operation is completed.

[0111] The operation process of the device performing multiple automatic hammering in this embodiment is as follows:

[0112] Referring to the operation steps of single manual hammering, complete the operations of assembling the hammering mechanism, starting the automatic controller 6, fine-tuning the transmission chain 35 and placing the culture box body;

[0113] Set the automatic operation parameters: in the "Automatic Operation Settings" window of the "Hammer Mode" interface, enter the "Displacement Value" (0.0-1000.0mm range), that is, the height of the hammer; "Number of Hammer Blows" (0-1000 range); "Single Time" (0-1000s range), that is, the duration of a single hammer blow;

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

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

[0116] Start and run multiple automatic hammering operations: Click the "Run" button in the "Automatic Operation Settings" window in the "Hammering Mode" interface to start automatic operation. The operation process of the device is as follows: record the initial moment of the hammering, the electromagnet 39 is powered off, and the traction slider 38 moves 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, based on which it can be judged that the two are tightly fitted; the electromagnet 39 is powered on to attract the force-applying hammer 25, and it is kept for 0.2s to wait for the attraction to stabilize, and the initial displacement value is recorded at the same time; move the traction slider 38 upward 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 upward, 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, keep the current state unchanged until the "single time" timing is completed, repeat the above process to enter the next hammering, and the "number of hammering times" parameter is reduced by 1;

[0117] When the "Number of Hammering Times" parameter is reduced to zero, the electromagnet 39 is powered off, the traction slider 38 is moved to the origin displacement, and the entire automatic hammering operation is completed. In particular, at any time during the operation, you can click the "Pause" button in the "Automatic Operation Settings" window to pause the operation, click the "Run" button again to resume the operation, or click the reset button 622 to end the operation in advance.

[0118] The operation process of the device in the static pressure mode in this embodiment is as follows:

[0119] Assemble the static pressure mechanism (5): Press Figure 6-10 As shown, the lower frame 1, the upper frame 2, the clamping mechanism 4, the static pressure mechanism 5, and the automatic controller 6 are assembled so that the device works in the static pressure mode;

[0120] Start the automatic controller (6): refer to the operation steps of single manual hammering to connect the lines; 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] Placing the culture box 43: Place the culture box 43 by referring to the operation steps of single manual hammering.

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

[0123] Start displacement and pressure detection: Click the "Start Detection" button in the "Static Pressure Mode Interface"-"General Settings" window to start real-time monitoring of displacement and pressure and start timing. The current time is displayed in the text box in the "General Settings" window. At the same time, 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; the "Real-time Pressure Detection" window will update the pressure-time curve in real time (data update frequency is 5Hz) and display the current pressure data in the text box; at any time, the "Time Reset" 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 Reset" button in the "Real-time Displacement Detection" window can set the current position as the coordinate origin; the "Pressure Reset" button in the "Real-time Pressure Detection" window can set the current pressure (tension) force as the pressure origin; click the "Start Detection" button again to turn off the displacement and pressure detection functions.

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

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

[0126] The hydrostatic electric push rod 53 starts to move slowly downward, and the push rod head together with the pressure sensor 54, the positioning plate 55, and the hydraulic damping rod 56 move downward synchronously, and apply pressure to the force-applying hammer 25. The pressure is transmitted to the soil sample in the culture box 43 through the force-applying hammer 25 and the buffer hammer 41, and the pressure value increases continuously as the pressure is pushed downward; when the pressure value is equal to the "pressure threshold" parameter, the pressure is stopped and the timing starts, and the controller will dynamically fine-tune the pressure depth according to the PID algorithm to maintain a constant pressure value.

[0127] End the static pressure operation: when the timing duration is equal to the "holding time" parameter or the downward displacement is greater than the "displacement threshold" parameter, the static pressure electric push rod 53 returns to the original position, the static pressure operation is ended, and the culture box 43 is taken out for use.

[0128] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0129] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A compacted soil preparation device, characterized in that: It has two working modes: hammering and static pressure, and comprises 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 arranged at the bottom of the support frame, and a clamping bin is arranged inside the clamping mechanism (4), and the clamping bin is used to hold the culture box (43). The automatic controller (6) is respectively connected to the hammer mechanism (3) and the static pressure mechanism (5) by signals; In the hammering mode, the hammering mechanism (3) is arranged on the top of the support frame and is located directly above the culture box (43), and the hammering mechanism (3) is capable of performing a hammering operation on the soil in the culture box (43); In the static pressure mode, the static pressure mechanism (5) is arranged on the top of the support frame and is located 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).

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

3. The compacted soil preparation device according to claim 1, characterized in that: The clamping mechanism (4) comprises a buffer hammer (41) and a clamping platform (42), the clamping bin 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).

4. The compacted soil preparation device according to claim 3, characterized in that: The buffer hammer (41) comprises a buffer hammer guide column (411), a buffer hammer pad (412), and a buffer hammer column (413). The lower end of the buffer hammer guide column (411) is arranged on the clamping platform (42), the upper end of the buffer hammer guide column (411) passes through the buffer hammer pad (412), and the upper end of the buffer hammer column (413) is fixed on the buffer hammer pad (412). When a force is applied downward 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 column (411).

5. The compacted soil preparation device according to claim 4, characterized in that: The clamping platform (42) comprises a porous top plate (421), a circular fixed column (422), a screw (423), a handle (424), a clamping steel plate (425), a guide rod (426), and a porous bottom plate (427), wherein the porous top plate (421) is arranged at the upper end of the circular fixed column (422), and the porous bottom plate (427) is arranged at the lower end of the circular fixed column (422); There are four circular fixed columns (422), each of which is provided with a screw (423) and 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 provided with a handle (424). The space enclosed by the four clamping steel plates (425) and the porous bottom plate (427) forms the clamping bin.

6. The compacted soil preparation device according to claim 5, characterized in that: The support frame is provided with a slide rail optical axis (24) and a force-applying hammer (25), and the hammer mechanism (3) comprises 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 slide block (38) and an electromagnet (39); The traction motor bracket (31) is detachably arranged at the top of the support frame, the traction slider (38) is sleeved on the slide rail optical axis (24) and the electromagnet (39) is arranged at the bottom, one end of the chain (35) is arranged at one side of the traction motor bracket (31), the other end of the chain (35) first extends downward to wrap around the bottom end of the sprocket (34), then extends upward to wrap around the top end 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 end of the first wire displacement sensor (32) is connected to the top end of the support frame, and the bottom end 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 drivingly connected to the sprocket (34). When the traction electric push rod (33) is extended or shortened, the traction slider (38) can be driven to rise or fall through the chain (35).

7. The compacted soil preparation device according to claim 1, characterized in that: The support frame is provided with a slide rail optical axis (24) and a force-applying hammer (25), and the static pressure mechanism (5) comprises a middle cross beam (51), a second 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); The middle cross beam (51) is detachably arranged on the top of the support frame, the top of the hydrostatic electric push rod (53) is arranged on the middle cross beam (51), the bottom of the hydrostatic electric push rod (53) is connected to the force hammer (25) through the hydraulic damping rod (56), the pressure sensor (54) is arranged between the hydraulic damping rod (56) and the hydrostatic electric push rod (53), the positioning plate (55) is arranged on the top of the hydraulic damping rod (56), and the top and bottom ends of the second pull-wire displacement sensor (52) are respectively connected to the middle cross beam (51) and the positioning plate (55).

8. A method for calibrating displacement of a compacted soil preparation device, characterized in that: The steps include: S1: Enter the displacement calibration software interface, connect the power 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, 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; S2: manually remove the positioning end of the first wire-drawing displacement sensor (32) or the second wire-drawing displacement sensor (52), pull it to any fixed position 1 along the wire-drawing direction and keep it unchanged; select the "Set Position 1" input box in the "First Step" window of the displacement calibration software interface, and fill in the data "0"; click the "Collect Position 1 Signal" button in the "First Step" window, and the differential voltage signal of the first wire-drawing displacement sensor (32) or the second wire-drawing displacement sensor (52) corresponding to position 1 is automatically filled in the "Position 1 Signal" text box; S3: manually pulling the positioning end of the first wire-drawing displacement sensor (32) or the second wire-drawing displacement sensor (52) along the wire-drawing direction to any fixed position 2 and keeping it unchanged, wherein the displacement of position 2 is greater than the displacement 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; clicking the "Collect position 2 signal" button in the "Second step" window, and the differential voltage signal of the first wire-drawing displacement sensor (32) or the second wire-drawing displacement sensor (52) corresponding to position 2 is automatically filled in the "Position 2 signal" text box; S4: Select the "Displacement Calibration" button, the system will automatically calculate the "Current Signal Scale Parameter" value and display the result in the corresponding text box.

9. A method for calibrating pressure of a compacted soil preparation device, characterized in that: The steps include: M1: Enter the pressure calibration software interface, connect the power 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; select the "pressure calibration" button in the "real-time pressure detection" window in the static pressure mode interface; M2: Hang 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 "Collect 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 in the "Pressure 1 Signal" text box; M3: Take down a weight, then the pulling force is the weight of a single weight; select the "Set Pressure 2" input box in the "Step 2" window of the pressure calibration software interface, and fill in the data of the single weight weight; click the "Collect 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 in the "Pressure 2 Signal" text box; M4: Select the "Pressure Calibration" button, 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 calibration once; When the hardware of the second wire displacement sensor (52) is replaced and may cause an error in displacement measurement, a displacement recalibration is required; or when the hardware of the pressure sensor (54) is replaced and may cause an error in pressure measurement, a pressure recalibration is required.

Images