A soil moisture detection device

Abstract

The present invention relates to the technical field of soil detection, and in particular to a soil moisture detection device, comprising a shell, a sampling port being arranged on one side of the shell, and a sampling mechanism being arranged in the shell, wherein the sampling mechanism comprises a vertical plate and a push plate fixed on the inner bottom surface of the shell, and two movable plates are symmetrically slidably installed on one side of the push plate, and through holes are opened on one side of the vertical plate at corresponding positions, and the two movable plates penetrate the through holes at corresponding positions and are commonly connected with a sampler, and the sampling process is combined with the drying process by arranging the sampling mechanism and the auxiliary mechanism, and the weighing process is combined by arranging a rotating shaft in a material box and a breaking rod on the surface of the rotating shaft, and the rotating shaft rotates to drive the breaking rod to rotate, so that the weighed soil sample can be broken, and then the contact surface between the loose soil sample and the air is increased, and the heating device can accelerate the evaporation of moisture in the soil and make the soil reach a dry state, and after the reading of the weighing device no longer changes, the reading is read and the experimental result is calculated.

Description

Technical Field

[0001] The present invention relates to the technical field of soil detection, and in particular to a soil moisture detection device. Background Art

[0002] Soil moisture is an important parameter affecting the global water, carbon and energy cycles. Together with vegetation moisture content, it is considered to be two core variables that can identify major changes in terrestrial ecosystems. Obtaining high-precision soil moisture information is crucial for food security, water resource optimization and management, and ecological environmental protection. Common methods for detecting soil moisture include drying method, alcohol combustion method, neutron instrument method, and resistance method. Among them, the drying method is a standard method for determining soil moisture due to its simple operation, high measurement accuracy, and is often used to calibrate other measurement methods, such as a soil moisture content detection device and method disclosed in publication number CN115389740A.

[0003] However, the operating steps of the drying method in the prior art are as follows: due to the influence of plant rhizomes such as grass roots on the surface, the plant rhizomes penetrate into the ground to a certain depth, and the plant rhizomes will absorb soil moisture. In order to prevent the plant rhizomes from being carried by the soil for sampling, it is necessary to select soil at a certain depth below the surface for sampling. After digging a certain depth of the ground, samples are taken from the side walls of the dug pit to ensure the depth position of the sampled sample. The soil sample is manually taken out of the sampler with a tool, and then the sampler is wrapped and sealed. After being brought back to the laboratory, the sealing material wrapped around the outside of the sampler is removed for drying. During the entire measurement process, the sampling process and the drying process are independent of each other and there is no coordination. In addition, the drying method in the prior art is mostly to put the entire sampler carrying the soil sample into the dryer for a drying operation lasting several hours, and then measure the weight to calculate the moisture content. The overall process is time-consuming, and data cannot be obtained in real time. In addition, the sealing material cannot completely guarantee that the moisture will not evaporate during the process of bringing the soil sample back to the laboratory, which may affect the measurement results. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a soil moisture detection device, which can effectively solve the problem that the sampling process and the drying process in the whole measurement process of the prior art are independent of each other and cannot obtain data in real time.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a soil moisture detection device, comprising:

[0007] A housing, wherein a sampling port is provided on one side of the housing;

[0008] The sampling mechanism comprises a vertical plate fixed to the inner bottom surface of the housing and a push plate arranged on the side of the vertical plate away from the sampling port, two movable plates are symmetrically slidably installed on the side of the push plate close to the sampling port, the other ends of the two movable plates penetrate the vertical plate and are commonly connected with a sampler, a guide plate is fixed to the side of the vertical plate close to the sampling port, a guide groove is symmetrically opened on the upper end surface of the guide plate, and the guide groove is composed of a linear sampling groove and an arc-shaped lofting groove that are interconnected, a guide rod is fixedly installed on the upper surface of the movable plate, and each guide rod is slidably installed in the corresponding guide groove;

[0009] An auxiliary mechanism, the auxiliary mechanism comprising a material box arranged in the housing and directly below the sampler, wherein a heating device for heating the soil is arranged in the material box;

[0010] A weighing device is arranged on the inner bottom surface of the shell and is used for weighing the material box.

[0011] Preferably, the sampler comprises two semi-cylindrical sampling rings, and the two sampling rings are hinged to each other;

[0012] The sampling mechanism also includes a sampling motor, which is fixed on a side of the vertical plate away from the sampling port. A gear is fixed to the output shaft of the sampling motor, and the gear is meshed with a toothed plate. One side of the toothed plate is fixedly connected to a push plate, and a load-bearing block is rotatably installed at the end of the movable plate. Fixed blocks are symmetrically fixed on the outer side surfaces of the two sampling rings that are opposite to each other, and the side surfaces of the load-bearing blocks are fixedly connected to the fixed blocks. A slide plate is symmetrically fixed on one side of the push plate close to the sampling port, and the slide plate is slidably inserted on the vertical plate. A plurality of sliding rods are arranged between the two movable plates, and the sliding rods are vertically slidably inserted in the two movable plates.

[0013] Preferably, a plurality of rotating shafts are rotatably mounted in a linear array on the inner walls of both sides in the length direction of the material box, and the rotating shafts are driven in the same direction, and a plurality of breaking rods are evenly fixed on the side surfaces of the rotating shafts.

[0014] Preferably, it also includes a pushing mechanism, which includes a turntable, a lever is fixed at an eccentric position on one side of the turntable close to the sampling port, a force transmission rod is rotatably installed on the lever, a force-bearing rod is rotatably connected to the force transmission rod, a screw is rotatably installed on the end of the force-bearing rod away from the force transmission rod, an internal thread sleeve is non-self-lockingly threaded on the screw, the internal thread sleeve is fixed to the inner top surface of the outer shell, a cylindrical pushing block is fixed to the end of the screw, a plurality of scrapers made of elastic material are evenly fixed to the outer circumferential surface of the pushing block, and the outer diameter of the pushing block is smaller than the inner diameter of the sampler.

[0015] Preferably, a water tank is fixed to the upper end surface of the shell, and a telescopic tube is connected to the lower end surface of the water tank. A connecting seat is rotatably installed on the side of the pushing block close to the screw, and a water outlet pipe is connected to the side of the connecting seat. A solenoid valve is installed on the water outlet pipe, and the telescopic tube is connected to the water outlet pipe through the connecting seat.

[0016] Preferably, the pushing mechanism also includes a dual-axis motor, which is an independently driven dual-axis motor, fixed on the inner bottom surface of the outer shell, one of the output ends of the dual-axis motor is fixed with sprocket one, the sprocket one is meshedly connected with a chain, the inner side of the chain is meshedly connected with sprocket two, the sprocket two is coaxially fixed with bevel gear one, the sprocket two and bevel gear one are rotatably mounted on one side inner wall of the outer shell, the bevel gear one is meshedly connected with bevel gear two, the bevel gear two is coaxially fixed with the turntable and rotatably mounted on the inner top surface of the outer shell, and the other output end of the dual-axis motor is used to drive one of the rotating shafts to rotate.

[0017] Preferably, the output shaft at the other end of the dual-axis motor is fixed with a clutch active end, one end of the rotating shaft extends through the discharge box and is fixed with a pulley, each adjacent two pulleys are connected by a transmission belt, and the side wall of one of the pulleys is fixed with a clutch driven end, and the clutch active end is engaged or disengaged with the clutch driven end.

[0018] Preferably, a discharge port is provided on the outer side surface of the material box, and a discharge plate is sealed and rotatably installed on the discharge port, convex card blocks are symmetrically fixed on the outer walls of both sides of the weighing device, and a concave card block used in conjunction with the convex card block is fixed on the lower surface of the outer shell, a locking block is inserted between the concave card block and the convex card block, and the inner bottom surface of the material box is inclined toward the direction of the discharge port.

[0019] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] 1. By setting up a sampling mechanism and an auxiliary mechanism, the sampling process is combined with the drying process. Through the rotating shaft set in the material box and the breaking rod on the surface of the rotating shaft, the rotating shaft rotates to drive the breaking rod to rotate, which can break the weighed soil sample, thereby increasing the contact surface between the loose soil sample and the air. The heating device can accelerate the evaporation of water in the soil and make the soil dry. After the reading of the weighing device no longer changes, read the reading and calculate the experimental results;

[0021] 2. The sampling motor drives the gear to rotate, and the gear drives the toothed plate to move, pushing the push plate to move under the guidance of the slide plate, and the push plate drives the movable plate to move. The movable plate moves in the same direction under the guidance of the guide rod and the straight section of the guide groove. At this time, the two samplers are in a merged state, forming a cylindrical shape for sampling. After the sampling is completed, the sampler is driven by the sampling motor through a series of transmissions and then opens to form a semi-cylindrical shape, and cooperates with the pushing mechanism to take the soil sample into the material box, avoiding the manpower waste of manual sampling;

[0022] 3. The weighing device is set inside the device to save time in returning to the laboratory after obtaining the soil sample, and to avoid the influence of the volatilization of water in the soil sample on the measurement results during the return to the laboratory. The whole device can complete the measurement and calculation at the sampling site, saving a lot of time, ensuring the timeliness of the experimental results, and at the same time ensuring the accuracy of the test results.

[0023] To summarize, the sampling motor drives the sampler to take samples, and then the pushing mechanism pushes the soil sample into the material box. The weighing device weighs the material box and the soil sample. The auxiliary mechanism crushes the soil sample to increase the contact area with the air. The heating device accelerates the drying of the soil sample. The weighing device weighs again to obtain the measurement result. The overall device is flexible in coordination and highly integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0027] Figure 3 It is a structural schematic diagram of the sampling mechanism of the present invention;

[0028] Figure 4 for Figure 3 The enlarged schematic diagram of point B in FIG.

[0029] Figure 5 A top view of the sampler of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the movable plate of the present invention;

[0031] Figure 7 for Figure 6 The enlarged schematic diagram of point C in FIG.

[0032] Figure 8 It is a structural schematic diagram of the material pushing mechanism of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the material box of the present invention;

[0034] Fig.10 It is a schematic diagram of the cross-sectional structure of the present invention;

[0035] Fig.11 Another cross-sectional structural schematic diagram of the present invention;

[0036] Fig.12 for Fig.11 The enlarged schematic diagram of point D in FIG.

[0037] Figure numerals: 1, housing; 2, sampling mechanism; 21, sampling motor; 22, gear; 23, tooth plate; 24, push plate; 25, movable plate; 251, slide bar; 252, load-bearing block; 253, fixed block; 26, slide plate; 27, guide plate; 271, guide rod; 28, sampler; 3, push mechanism; 31, double-axis motor; 32, sprocket wheel 1; 321, chain; 322, sprocket wheel 2; 33, bevel gear 1; 331, bevel gear 2; 34, turntable; 341, lever; 35, force transmission rod; 3 6. Force-bearing rod; 361. Screw rod; 362. Internal threaded sleeve; 37. Push block; 371. Scraper; 372. Connecting seat; 4. Auxiliary mechanism; 41. Material box; 42. Pulley; 421. Clutch driven end; 422. Clutch active end; 43. Transmission belt; 44. Rotating shaft; 441. Breaking rod; 45. Heating device; 46. Discharging plate; 5. Weighing device; 51. Convex block; 52. Concave block; 53. Lock block; 6. Water tank; 61. Telescopic tube; 62. Solenoid valve; 63. Water outlet pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] Example: Refer to Figures 1 to 12, a soil moisture detection device, including a shell 1 and a sampling mechanism 2, the sampling mechanism 2 includes a vertical plate fixed on the inner bottom surface of the shell 1 and a push plate 24 arranged on the side of the vertical plate away from the sampling port, and the shell 1 is also provided with an auxiliary mechanism 4, a pushing mechanism 3, and a weighing device 5. The sampling is performed by a sampling ring arranged inside the device, and the weight of the soil sample before and after drying is measured by the material box and the weighing device, and the moisture content is calculated, so as to save the time of returning to the laboratory after obtaining the soil sample, and avoid the influence of the moisture volatilization in the soil sample on the measurement result during the return to the laboratory. By setting the sampling mechanism 2 and the pushing mechanism 3, the manpower wasted by manual sampling is avoided. By setting the rotating shaft 44 in the material box 41 and the breaking rod 441 on the surface of the rotating shaft 44, the rotating shaft 44 rotates to drive the breaking rod 441 to rotate, so as to break the weighed soil sample, thereby increasing the contact surface between the loose soil sample and the air. The heating device 45 can refer to the electric heater in the prior art ( Fig. 9 As shown is a schematic diagram of taking out 45 for display), it is installed at the bottom of the material box 41 to transfer heat to the soil sample in the material box 41 through heat transfer, accelerate the evaporation of water in the soil, and make the soil quickly reach a dry state. After the reading of the weighing device 5 no longer changes, the reading is read and the experimental results are calculated. The overall device can complete the measurement and calculation at the sampling site, saving a lot of time, ensuring the timeliness of the experimental results while also ensuring the accuracy of the test results.

[0041] Among them, two movable plates 25 are symmetrically slidably installed on one side of the push plate 24 near the sampling port, and the other ends of the two movable plates 25 penetrate the vertical plate and are commonly connected with a sampler 28. The sampler 28 includes two semi-cylindrical sampling rings, which are hinged to each other. A guide plate 27 is fixed on one side of the vertical plate near the sampling port. The upper end surface of the guide plate 27 is symmetrically opened with guide grooves, which are composed of mutually connected linear sampling grooves and arc-shaped lofting grooves. A guide rod 271 is fixedly installed on the upper surface of the movable plate 25, and each guide rod 271 is slidably installed in the corresponding guide groove. The sampling mechanism 2 also includes a sampling motor 21. The sampling The motor 21 is fixed on the side of the vertical plate away from the sampling port. The output shaft of the sampling motor 21 is fixed with a gear 22, and the gear 22 is meshed with a tooth plate 23. One side of the tooth plate 23 is fixedly connected to the push plate 24. A load-bearing block 252 is rotatably installed at the end of the movable plate 25. Fixed blocks 253 are symmetrically fixed on the outer side surfaces of the two sampling rings that are opposite to each other. The side surfaces of the load-bearing blocks 252 are fixedly connected to the fixed blocks 253. A slide plate 26 is symmetrically fixed on the side of the push plate 24 close to the sampling port. The slide plate 26 is slidably inserted on the vertical plate. A plurality of slide bars 251 are arranged between the two movable plates 25. The slide bars 251 are vertically slidably inserted in the two movable plates 25.

[0042] The sampling motor 21 drives the gear 22 to rotate, and the gear 22 drives the toothed plate 23 to move, pushing the push plate 24 to move under the guidance of the slide plate 26, and the push plate 24 drives the movable plate 25 to move. The movable plate 25 moves in the same direction under the guidance of the guide rod 271 and the straight sampling slot segment. At this time, the two samplers 28 are in a merged state, forming a cylindrical shape. The sampler 28 is embedded in the soil and the sampling area formed between the samplers 28 is filled with soil. The sampling motor 21 is adjusted to reverse, and the sampler 28 is driven to leave the soil under transmission. At this time, the sampling area between the two samplers 28 is full of soil samples, and then the two movable plates 25 approach each other when entering the arc sampling slot position. Under the action of the rotational connection between the movable plate 25 and the load-bearing block 252, the sampler 28 begins to open along the hinge line above the material box 41. Finally, the sampling motor 21 stops rotating when the side wall of the sampler 28 opens to the fitting position, and part of the soil sample falls into the inside of the material box 41.

[0043] The pushing mechanism 3 includes a dual-axis motor 31, which is an independently driven dual-axis motor, fixed to the inner bottom surface of the housing 1, and one of the output ends of the dual-axis motor 31 is fixed with a sprocket 1 32, which is meshedly connected with a chain 321, and the inner side of the chain 321 is meshedly connected with a sprocket 2 322, and the sprocket 2 322 is coaxially fixed with a bevel gear 1 33, and the sprocket 2 322 and the bevel gear 1 33 are rotatably mounted on one side inner wall of the housing 1, and the bevel gear 1 33 is meshedly connected with a bevel gear 2 331, and the bevel gear 2 331 is coaxially fixed with a turntable 34 and rotatably mounted on the inner top surface of the housing 1. The pushing mechanism 3 includes a turntable 34, on which a lever 341 is fixed at an eccentric position near the sampling port. A force transmitting rod 35 is rotatably mounted on the lever 341, on which a force bearing rod 36 is rotatably connected, and a screw 361 is rotatably mounted on the end of the force bearing rod 36 away from the force transmitting rod 35. An internal threaded sleeve 362 is non-self-lockingly threaded on the screw 361, and the internal threaded sleeve 362 is fixed to the inner top surface of the outer shell 1. A cylindrical pushing block 37 is fixed to the end of the screw 361, and a plurality of scrapers 371 made of elastic material are evenly fixed on the outer circumferential surface of the pushing block 37. The outer diameter of the pushing block 37 is smaller than the inner diameter of the sampler 28.

[0044] One of the output ends of the dual-axis motor 31 drives the sprocket wheel 1 32 to rotate, and then drives the sprocket wheel 2 322 to rotate through the transmission of the chain 321, and the sprocket wheel 2 322 drives the bevel gear 1 33 to rotate, and the bevel gear 1 33 drives the meshing bevel gear 2 331 to rotate, thereby driving the turntable 34 to rotate, and the rotation of the turntable 34 drives the lever 341 to make a circular motion, and the lever 341 drives the force rod 36 and the screw rod 361 rotatably connected to the force rod 36 through the hinged force transmission rod 35 to move, and the screw rod 361 reciprocates and linearly moves while rotating axially under the action of the internal threaded sleeve 362, driving the pusher block 37 to rotate and reciprocate at the same time, and the pusher block 37 scrapes the inner wall of the sampler 28 with the cooperation of the scraper 371 evenly fixed on its surface, thereby pushing and scraping the soil sample in the semi-cylinder sampler 28, and the soil sample leaving the sampler 28 falls into the material box 41 below under the action of gravity.

[0045] In order to achieve the purpose of drying the soil sample, the auxiliary mechanism 4 includes a material box 41, the output shaft at the other end of the dual-axis motor 31 is fixed with a clutch active end 422, one end of the rotating shaft 44 extends through the material box 41 and is fixed with a pulley 42, each adjacent two pulleys 42 are connected by a transmission belt 43, a clutch driven end 421 is fixed to the side wall of one of the pulleys 42, the clutch active end 422 is engaged or separated with the clutch driven end 421, the material box 41 is arranged below the sampler 28, a heating device 45 is arranged in the material box 41, and a plurality of rotating shafts are rotatably installed in a linear array on the inner walls on both sides of the length direction of the material box 41. 44, and each rotating shaft 44 is driven in the same direction, a plurality of breaking rods 441 are evenly fixed on the side of the rotating shaft 44, a water tank 6 is fixed on the upper end surface of the shell 1, and a telescopic tube 61 is connected to the lower end surface of the water tank 6, a connecting seat 372 is rotatably installed on the side wall of the pusher block 37, and a water outlet pipe 63 is connected to the side of the connecting seat 372, and a solenoid valve 62 is installed on the water outlet pipe 63, and the telescopic tube 61 is connected to the water outlet pipe 63 through the connecting seat 372, and convex blocks 51 are symmetrically fixed to the outer walls of both sides of the weighing device 5, and a concave block 52 used in conjunction with the convex block 51 is fixed on the lower surface of the shell 1, and a locking block 53 is inserted between the concave block 52 and the convex block 51.

[0046] The weighing device 5 is pushed to move along the gap between the convex block 51 and the concave block 52 until the clutch driven end 421 is connected to the clutch active end 422, and the locking block 53 is inserted into the gap between the convex block 51 and the concave block 52 on the side away from the dual-axis motor 31. The other output end of the dual-axis motor 31 is started to drive the connected clutch active end 422 and the clutch driven end 421 to rotate and then transmit the drive to a pulley 42 to rotate. Multiple pulleys 42 rotate together through the transmission of the transmission belt 43, thereby driving the rotating shaft 44 to rotate. The rotating shaft 44 drives the breaking rod 441 to rotate to crush the soil sample dropped into the material box 41 and finally make the soil sample evenly distributed in the material box 41.

[0047] When the solenoid valve 62 is started and the push rod rotates and moves periodically, water flows out of the water outlet pipe 63 and is sprayed onto the surface of the push block 37. The push block 37 drives the water to brush off the soil residue adhering to the side wall of the sampler 28 through the scraper 371, and the mixture of water and soil falls into the material box 41. The rotation of the rotating shaft 44 drives the breaking rod 441 to rotate so that the soil samples in the material box 41 and on the breaking rod 441 are cleaned into the water.

[0048] Reference Figure 1 as well as Fig. 9 A discharge port is provided on the outer side of the material box 41, and a discharge plate is rotatably installed on the discharge port. The inner bottom surface of the material box 41 is inclined toward the discharge port. The inclined arrangement of the discharge port and the inner bottom surface of the material box 41 can facilitate the discharge of soil samples inside the material box 41.

[0049] The working principle of the present invention is as follows: the device is fixed at the depth to be sampled in the soil pit, and then the sampling motor 21 is started to drive the gear 22 to rotate, the gear 22 drives the toothed plate 23 to move, and the push plate 24 is pushed to move under the guidance of the slide plate 26, and the push plate 24 drives the movable plate 25 to move. The movable plate 25 moves in the same direction under the guidance of the guide rod 271 and the linear sampling groove. At this time, the sampler 28 is in a merged state, forming a cylindrical shape, and the sampler 28 is embedded in the soil and the hollow in the center is filled with soil. The sampling motor 21 is started to reverse, and the sampler 28 is driven to leave the soil under transmission. At this time, the hollow position between the two samplers 28 is filled with soil samples, and then the two movable plates 25 approach each other when entering the arc-shaped sampling groove position. Under the action of the rotation connection between the movable plate 25 and the load-bearing block 252, the sampler 28 begins to open along the hinge line above the material box 41, and finally the sampling motor 21 is turned off when the side walls of the two samplers 28 rotate to the fitting position, and part of the soil sample falls into the inside of the material box 41.

[0050] Start the dual-axis motor 31, one of the output ends drives the sprocket 1 32 to rotate, and the chain 321 drives the sprocket 2 322 to rotate, the sprocket 2 322 drives the bevel gear 1 33 to rotate, the bevel gear 1 33 drives the meshing bevel gear 2 331 to rotate, and then drives the turntable 34 to rotate, the rotation of the turntable 34 drives the lever 341 to make a circular motion, the lever 341 drives the force rod 36 to make a reciprocating motion through the hinged force transmission rod 35, the force rod 36 drives the rotationally connected screw rod 361 to reciprocate, and because the screw 361 is connected to the internal thread The sleeve 362 is a non-self-locking threaded match. Under the action of the internal threaded sleeve 362, the screw 361 reciprocates and linearly moves while axially rotating, driving the pusher block 37 to reciprocate and rotate at the same time. The pusher block 37, in cooperation with the scraper 371 evenly fixed on the outer circumference, scrapes off the remaining soil sample adhering to the inner wall of the sampler 28 and drops it into the material box 41. When the reading on the weighing device 5 no longer changes, the dual-axis motor 31 is turned off. At this time, the clutch driven end 421 and the clutch active end 422 are in a non-meshing state, and the reading is read and recorded.

[0051] The weighing device 5 is pushed to move along the gap between the convex block 51 and the concave block 52 until the clutch driven end 421 is meshed with the clutch active end 422, and the locking block 53 is inserted into the gap between the convex block 51 and the concave block 52, and the other output end of the dual-axis motor 31 is started to drive the meshed clutch driven end 421 and the clutch active end 422 to rotate, and then transmit the transmission to a pulley 42 to rotate, and multiple pulleys 42 rotate together through the transmission of the transmission belt 43, thereby driving the rotating shaft 44 to rotate, and the rotating shaft 44 drives the breaker rod 441 to rotate and drop it into the material box. The soil sample in 41 is crushed and finally evenly distributed in the material box 41, the double-axis motor 31 is started and stopped, and the heating device 45 starts to work to dry the moisture of the soil sample. Since the soil sample is in a broken and evenly distributed state, the moisture evaporates rapidly. After the reading of the weighing device 5 no longer changes, the double-axis motor 31 is turned off, the locking block 53 is taken out, and the weighing device 5 is pushed to move along the gap between the convex block 51 and the concave block 52 until the clutch driven end 421 and the clutch active end 422 are no longer engaged, and the reading is read and the measurement result is calculated.

[0052] It is worth noting that after the measurement is completed, the weighing device 5 is pushed to move along the gap between the convex block 51 and the concave block 52 until the clutch driven end 421 and the clutch active end 422 are meshed again, the lock block 53 is inserted, the two output ends of the dual-axis motor 31 and the electromagnetic valve 62 are started, and while the push rod rotates and moves periodically, water is discharged from the water outlet pipe 63 and sprayed onto the surface of the push block 37. The push block 37 drives the water to brush off the soil residue adhering to the side wall of the sampler 28 through the scraper 371, and the mixture of water and soil falls into the material box 41. The rotation of the rotating shaft 44 drives the breaking rod 441 to rotate so that the soil samples in the material box 41 and on the breaking rod 441 are diluted in water, the two output ends of the dual-axis motor 31 and the electromagnetic valve 62 are closed, the discharge plate 46 is opened, and the water-soil mixture flows out to the outside of the device through the discharge plate 46, and then the discharge plate 46 is closed, and the operation is repeated until no soil remains in the device, which is convenient for the next cycle of measurement.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil moisture detection device, characterized in that: include: A housing (1), wherein a sampling port is provided on one side of the housing (1); A sampling mechanism (2), the sampling mechanism (2) comprising a vertical plate fixed to the inner bottom surface of the housing (1) and a push plate (24) arranged on a side of the vertical plate away from the sampling port, two movable plates (25) symmetrically slidably mounted on a side of the push plate (24) close to the sampling port, the other ends of the two movable plates (25) passing through the vertical plate and being commonly connected to a sampler (28), a guide plate (27) fixed to a side of the vertical plate close to the sampling port, a guide groove symmetrically opened on an upper end surface of the guide plate (27), the guide groove consisting of a linear sampling groove and an arc-shaped lofting groove connected to each other, a guide rod (271) fixedly mounted on the upper surface of the movable plate (25), each guide rod (271) being slidably mounted in a corresponding guide groove; An auxiliary mechanism (4), the auxiliary mechanism (4) comprising a material box (41) arranged in the housing (1) and directly below the sampler (28), wherein a heating device (45) for heating soil is arranged in the material box (41); A weighing device (5) is arranged on the inner bottom surface of the housing (1) and is used to weigh the material box (41).

2. A soil moisture detection device according to claim 1, characterized in that: The sampler (28) comprises two semi-cylindrical sampling rings, and the two sampling rings are hinged to each other; The sampling mechanism (2) further comprises a sampling motor (21), wherein the sampling motor (21) is fixed to a side of the vertical plate away from the sampling port, a gear (22) is fixed to the output shaft of the sampling motor (21), the gear (22) is meshingly connected to a toothed plate (23), one side of the toothed plate (23) is fixedly connected to a push plate (24), a load-bearing block (252) is rotatably mounted on the end of the movable plate (25), fixed blocks (253) are symmetrically fixed to the outer side surfaces of the two sampling rings facing away from each other, the load-bearing blocks (252) are fixedly connected to the fixed blocks (253), a slide plate (26) is symmetrically fixed to a side of the push plate (24) close to the sampling port, the slide plate (26) is slidably inserted on the vertical plate, a plurality of slide bars (251) are arranged between the two movable plates (25), and the slide bars (251) are vertically slidably inserted in the two movable plates (25).

3. A soil moisture detection device according to claim 2, characterized in that: A plurality of rotating shafts (44) are rotatably mounted in a linear array on the inner walls of both sides of the material box (41) in the length direction, and each rotating shaft (44) is driven in the same direction, and a plurality of crushing rods (441) are evenly fixed on the side surfaces of the rotating shafts (44).

4. A soil moisture detection device according to claim 3, characterized in that: The invention also comprises a pushing mechanism (3), wherein the pushing mechanism (3) comprises a rotating disk (34), a lever (341) being fixed at an eccentric position of the rotating disk (34) near the sampling port, a force transmission rod (35) being rotatably mounted on the lever (341), a force receiving rod (36) being rotatably connected to the force transmission rod (35), a screw (361) being rotatably mounted on the end of the force receiving rod (36) away from the force transmission rod (35), an internal thread sleeve (362) being mounted on the screw (361) in a non-self-locking thread, the internal thread sleeve (362) being fixed to the inner top surface of the housing (1), a cylindrical pushing block (37) being fixed to the end of the screw (361), a plurality of scrapers (371) made of elastic material being evenly fixed to the outer circumference of the pushing block (37), and an outer diameter of the pushing block (37) being smaller than an inner diameter of the sampler (28).

5. A soil moisture detection device according to claim 4, characterized in that: A water tank (6) is fixed to the upper end surface of the housing (1), and a telescopic tube (61) is connected to the lower end surface of the water tank (6). A connecting seat (372) is rotatably mounted on the side of the pusher block (37) close to the screw rod (361), and a water outlet pipe (63) is connected to the side of the connecting seat (372). A solenoid valve (62) is mounted on the water outlet pipe (63), and the telescopic tube (61) is connected to the water outlet pipe (63) via the connecting seat (372).

6. A soil moisture detection device according to claim 4, characterized in that: The pushing mechanism (3) further comprises a dual-axis motor (31), wherein the dual-axis motor (31) is an independently driven dual-axis motor, and is fixed to the inner bottom surface of the housing (1). A sprocket wheel 1 (32) is fixed to one of the output ends of the dual-axis motor (31), and the sprocket wheel 1 (32) is meshingly connected to a chain (321), and the inner side of the chain (321) is meshingly connected to a sprocket wheel 2 (322), and the sprocket wheel 2 (322) is coaxially fixed with a bevel gear 1 (33), and the sprocket wheel 2 (322) and the bevel gear 1 (33) are rotatably mounted on one inner wall of the housing (1), and the bevel gear 1 (33) is meshingly connected with a bevel gear 2 (331), and the bevel gear 2 (331) is coaxially fixed to a rotating disk (34) and is rotatably mounted on the inner top surface of the housing (1), and the other output end of the dual-axis motor (31) is used to drive one of the rotating shafts (44) to rotate.

7. A soil moisture detection device according to claim 6, characterized in that: The output shaft at the other end of the dual-axis motor (31) is fixed with a clutch active end (422), one end of the rotating shaft (44) extends through the discharge box (41) and is fixed with a pulley (42), each adjacent two pulleys (42) are connected by a transmission belt (43), a clutch driven end (421) is fixed to the side wall of one of the pulleys (42), and the clutch active end (422) is engaged with or disengaged from the clutch driven end (421).

8. The soil moisture detection device according to claim 1, characterized in that: The outer side surface of the material box (41) is provided with a discharge port, and the discharge port is sealed and rotatably mounted with a discharge plate (46), convex clamping blocks (51) are symmetrically fixed to the outer walls of both sides of the weighing device (5), and a concave clamping block (52) used in conjunction with the convex clamping block (51) is fixed to the lower surface of the shell (1), and a locking block (53) is inserted between the concave clamping block (52) and the convex clamping block (51), and the inner bottom surface of the material box (41) is inclined in the direction of the discharge port.

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