A soil moisture content detection device for automatic sampling type intelligent agricultural irrigation

Abstract

The application relates to the technical field of soil moisture content detection, in particular to an automatic sampling type intelligent agricultural irrigation soil moisture content detection device, which comprises a sampling vehicle, a fixing plate fixed on the sampling vehicle, a lifting assembly arranged on the fixing plate, a movable plate connected to the lifting assembly, a guide column fixed on the movable plate, a support plate fixed at the end of the guide column, a guide sleeve slidingly installed on the guide column, a connecting plate and a receiving plate fixed on the guide sleeve, a sampling mechanism arranged on the connecting plate, a sampler connected to the sampling mechanism, a pushing mechanism arranged on the connecting plate and connected to the pushing mechanism, a pushing disc slidingly connected to the sampler and connected to the pushing mechanism, and a transmission switching mechanism arranged on the sampling mechanism and connected to the pushing mechanism, wherein the transmission switching mechanism is connected with a first transmission gear and a second transmission gear, the respective actions of the sampling mechanism and the pushing mechanism can be controlled, sampling can be automatically completed, and the sample can be taken out from the sampler.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil moisture content detection, and particularly relates to an automatic sampling type soil moisture content detection device for intelligent agricultural irrigation. BACKGROUND

[0002] In the field of intelligent irrigation, accurate detection of soil moisture content is the key to realizing efficient water use and high-quality and high-yield crops.

[0003] Traditional soil moisture content detection methods mainly include manual sampling laboratory analysis, time domain reflectometry, frequency domain reflectometry, etc. Among them, the manual sampling and laboratory drying and weighing method is regarded as the benchmark method, but the process is complicated and time-consuming, and it is difficult to meet the real-time data requirements of modern intelligent agriculture.

[0004] In the prior art, soil sampling and detection devices for agricultural irrigation guidance mostly use simple mechanical sampling methods. The common operation process is: first, drive the sampler into the soil to obtain the sample by hand or electricity, then move the sampling device as a whole to the designated position, and then discharge the soil sample through a manual or simple ejection mechanism for detection.

[0005] However, after sampling is completed, the sampler is usually removed, and the sample is controlled to be separated from the sampler by external pushing. Since the external pushing is difficult to adapt to the sampler, the sample is prone to be loose and disturbed, which further causes mutual interference of different depth soils, resulting in deviation of the detection result. SUMMARY

[0006] The present application aims to provide an automatic sampling type soil moisture content detection device for intelligent agricultural irrigation to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] An automatic sampling type soil moisture content detection device for intelligent agricultural irrigation comprises:

[0009] A sampling vehicle and a fixed plate fixed on the sampling vehicle, the fixed plate is provided with a lifting assembly, the lifting assembly is connected with a movable plate, the movable plate is fixed with a guide column, and the end of the guide column is fixed with a support plate;

[0010] Further comprising:

[0011] A guide sleeve is slidably installed on the guide column, and the guide sleeve is fixed with a connecting plate and a receiving plate;

[0012] A sampling mechanism is arranged on the connecting plate, and a sampler is connected to the sampling mechanism; a pushing mechanism is also arranged on the connecting plate, and a pushing disc is connected to the pushing mechanism in sliding connection with the sampler;

[0013] A transmission switching mechanism is arranged on the sampling mechanism and connected to the pushing mechanism, and a first transmission tooth and a second transmission tooth are connected to the transmission switching mechanism; the transmission switching mechanism can adjust the cooperation state of the first transmission tooth and the second transmission tooth with the sampling mechanism and the pushing mechanism to control the corresponding actions of the sampler and the pushing disc.

[0014] As a further scheme of the present application, the sampling mechanism comprises a motor fixed on the connecting plate, and a transmission rod connected to the output shaft of the motor is rotatably arranged on the connecting plate.

[0015] As a further scheme of the present application, a first rotating sleeve and a hollow rod are rotatably arranged on the receiving plate, the hollow rod is fixedly connected to the sampler, a first follow-up tooth is fixed at the end of the first rotating sleeve and is in abutting cooperation with the first transmission tooth, and a first toothed belt is sleeved on the first rotating sleeve and is connected to the hollow rod.

[0016] As a further scheme of the present application, the pushing mechanism comprises a second rotating sleeve and a rotating rod rotatably arranged on the connecting plate, a second follow-up tooth is fixed at the end of the second rotating sleeve and is in abutting cooperation with the second transmission tooth, and a second toothed belt is sleeved on the second rotating sleeve and is connected to the rotating rod.

[0017] The present application further comprises a guide assembly and a guide component arranged on the connecting plate for driving the pushing disc to move.

[0018] As a further scheme of the present application, the guide assembly comprises a push rod slidingly arranged in the rotating rod and penetrating through the connecting plate and the sampler, the push rod is fixedly connected to the pushing disc, a helical groove is formed on the circumferential outer wall of the push rod, and a limiting block is fixed on the inner wall of the rotating rod and is in sliding fit with the helical groove.

[0019] As a further scheme of the present application, the guide component comprises a guide rod fixed on the connecting plate, and a guide plate fixedly connected to the push rod is slidingly arranged on the guide rod.

[0020] As a further scheme of the present application, the transmission switching mechanism comprises a follow-up plate slidingly arranged along the transmission rod, a limiting wheel is rotatably arranged on the follow-up plate, an inclined plate is fixed on the support plate and is in abutting cooperation with the limiting wheel, and a limiting rod is fixed on the receiving plate and penetrates through the follow-up plate.

[0021] As a further scheme of the present application: the two sides of the follow-up plate are respectively fixed with the first support column and the second support column arranged symmetrically, the first support column and the second support column are respectively fixed with the first limiting ring and the second limiting ring at the end, the first sliding plate and the second sliding plate are respectively slidably installed on the first support column and the second support column, the first sliding plate is rotationally connected with the first transmission gear, and the second sliding plate is rotationally connected with the second transmission gear.

[0022] As a further scheme of the present application: the transmission rod is sleeved with the first spring, the second spring and the third spring, the two ends of the first spring are respectively abutted with the follow-up plate and the first sliding plate, the two ends of the second spring are respectively abutted with the follow-up plate and the second sliding plate, and the two ends of the third spring are respectively abutted with the second sliding plate and the connecting plate.

[0023] As a further scheme of the present application: the support plate is fixed with the air cylinder, and the telescopic end of the air cylinder is fixedly connected with the receiving plate.

[0024] Compared with the prior art, the present application has the beneficial effects that: the present application controls the respective actions of the sampling mechanism and the pushing mechanism through the transmission switching mechanism, can realize the effect of automatically taking out the sample after the sampling is completed, when in the sampling state, the first transmission gear is controlled to cooperate with the sampling mechanism and the second transmission gear is controlled to separate from the pushing mechanism under the action of the transmission switching mechanism, thereby realizing the effect of one-way transmission, ensuring the accuracy and completeness of sampling, when the sampling is completed, the first transmission gear is controlled to separate from the sampling mechanism and the second transmission gear is controlled to cooperate with the pushing mechanism, so as to control the sample to slowly separate from the sampler through the pushing mechanism and the pushing disc.

[0025] When adjusting the transmission state, the accuracy of transmission can be ensured by first separating, then aligning and then engaging, so as to avoid interference in transmission, and at the same time, through the storage and release of elastic potential energy, the problem of tooth clashing when adjusting the transmission state can be avoided, so as to ensure the coherence and accuracy of the whole sampling process. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure schematic view of one embodiment of the soil moisture content detection device for automatic sampling type intelligent agricultural irrigation.

[0027] Figure 2 Structure schematic view of another angle in one embodiment of the soil moisture content detection device for automatic sampling type intelligent agricultural irrigation.

[0028] Figure 3 Connection relationship schematic view of the lifting assembly, the sampling mechanism, part of the transmission switching mechanism and part of the pushing mechanism in one embodiment of the soil moisture content detection device for automatic sampling type intelligent agricultural irrigation.

[0029] Figure 4 For Figure 3 Structure enlarged schematic view at A in the figure.

[0030] Figure 5 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of sampling mechanism, partial transmission switching mechanism, partial push mechanism, cylinder.

[0031] Figure 6 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of sampler.

[0032] Figure 7 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of transmission switching mechanism, sampling mechanism, partial push mechanism.

[0033] Figure 8 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of partial sampling mechanism, transmission switching mechanism.

[0034] Figure 9 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of transmission switching mechanism.

[0035] Figure 10 For automatic sampling type intelligent agricultural irrigation soil moisture content detection device in an embodiment of the structure schematic diagram of partial push mechanism.

[0036] In the figure: 1, sampling car; 2, fixed plate; 3, movable plate; 4, guide column; 5, support plate; 6, guide sleeve; 7, connecting plate; 8, receiving plate; 9, cylinder; 10, motor; 11, transmission rod; 12, first rotating sleeve; 1201, first follow-up tooth; 13, first toothed belt; 14, hollow rod; 15, sampler; 16, follow-up plate; 17, first support column; 1701, first limit ring; 18, first sliding plate; 1801, first transmission tooth; 19, first spring; 20, second support column; 2001, second limit ring; 21, second sliding plate; 2101, second transmission tooth; 22, second spring; 23, second rotating sleeve; 2301, second follow-up tooth; 24, third spring; 25, limit wheel; 26, inclined plate; 27, second toothed belt; 28, rotating rod; 2801, limit block; 29, push rod; 2901, helical groove; 30, guide rod; 31, guide plate; 32, push disc; 33, limit rod. DETAILED DESCRIPTION

[0037] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] In addition, the elements in the present application are referred to as "fixed to" or "disposed on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0039] Please refer to Figures 1-10 In the embodiments of the present application, an automatic sampling type intelligent agricultural irrigation soil moisture content detection device comprises:

[0040] A sampling vehicle 1 and a fixed plate 2 fixed on the sampling vehicle 1, the fixed plate 2 is provided with a lifting assembly, the lifting assembly is connected with a movable plate 3, the movable plate 3 is fixed with a guide column 4, and the end of the guide column 4 is fixed with a support plate 5;

[0041] Further comprising:

[0042] A guide sleeve 6 is slidingly installed on the guide column 4, the guide sleeve 6 is fixed with a connecting plate 7 and a receiving plate 8;

[0043] A sampling mechanism is arranged on the connecting plate 7, the sampling mechanism is connected with a sampler 15, and the connecting plate 7 is further provided with a pushing mechanism, the pushing mechanism is connected with a pushing disc 32 in sliding connection with the sampler 15;

[0044] A transmission switching mechanism is arranged on the sampling mechanism and connected with the pushing mechanism, the transmission switching mechanism is connected with a first transmission gear 1801 and a second transmission gear 2101, and the transmission switching mechanism can adjust the cooperation state of the first transmission gear 1801 and the second transmission gear 2101 with the sampling mechanism and the pushing mechanism, so as to control the corresponding actions of the sampler 15 and the pushing disc 32.

[0045] Specifically, in order to ensure that the detection result matches the corresponding sampling depth when sampling the soil, the sampling soil is usually controlled in sections to be ejected, for this, the lifting assembly is composed of a motor, a lead screw, a threaded sleeve and a guide rail, the movable plate 3 is fixedly connected with the threaded sleeve and slidably connected with the guide rail, the lead screw is driven by the motor and drives the threaded sleeve to move, thereby driving the movable plate 3 to slide along the guide rail, when sampling is needed, the movable plate 3 is controlled to move under the action of the lifting assembly, thereby driving the connecting plate 7 and the receiving plate 8 to move, so that the sampler 15 moves towards the soil, at the same time, under the cooperation of the sampling mechanism and the transmission switching mechanism, the sampler 15 is controlled to rotate to sample by rotating in and cutting, when the sampler 15 reaches the specified depth, the lifting assembly controls the sampler 15 to reset, at this time, the guide sleeve 6 slides axially along the guide column 4, so that the position of the sampler 15 in the horizontal direction changes and moves to the discharging position, the transmission switching mechanism controls the first transmission tooth 1801 to separate from the sampling mechanism, and moves to the cooperation position with the pushing mechanism through the second transmission tooth 2101, thereby controlling the pushing disc 32 to move through the pushing mechanism to eject the soil in the sampler 15, in this way, the effect that the sample is automatically controlled to separate from the sampler 15 after sampling is completed can be realized.

[0046] The support plate 5 is fixed with a cylinder 9, and the telescopic end of the cylinder 9 is fixedly connected with the receiving plate 8.

[0047] Please refer to Figures 1-3 、 Figures 5-7 , the sampling mechanism includes a motor 10 fixed on the connecting plate 7, the connecting plate 7 is rotatably installed with a transmission rod 11 connected with the output shaft of the motor 10, the receiving plate 8 is rotatably installed with a first rotating sleeve 12 and a hollow rod 14, the hollow rod 14 is fixedly connected with the sampler 15, the first rotating sleeve 12 is fixed at one end with a first follow-up tooth 1201 abutting against the first transmission tooth 1801, and the first rotating sleeve 12 is sleeved with a first toothed belt 13 connected with the hollow rod 14.

[0048] Please refer to Figures 1-3 、 Figures 5-7 、 Figure 10, the pushing mechanism comprises a second rotating sleeve 23 and a rotating rod 28, the second rotating sleeve 23 is fixed with a second follow-up tooth 2301 which is in contact with the second transmission tooth 2101, the second rotating sleeve 23 is sleeved with a second toothed belt 27 which is connected with the rotating rod 28; the guiding assembly and the guiding assembly for driving the pushing disc 32 to move are arranged on the connecting plate 7, the guiding assembly comprises a pushing rod 29 which is slidingly installed in the rotating rod 28 and penetrates through the connecting plate 7 and the sampler 15, the pushing rod 29 is fixedly connected with the pushing disc 32, the circumferential outer wall of the pushing rod 29 is formed with a spiral groove 2901, the inner wall of the rotating rod 28 is fixedly connected with a limiting block 2801 which is slidingly embedded in the spiral groove 2901, the guiding assembly comprises a guiding rod 30 which is fixed on the connecting plate 7, the guiding rod 30 is axially slidingly connected with a guiding plate 31 which is fixedly connected with the pushing rod 29.

[0049] In detail, the circumferential outer wall of the transmission rod 11 is fixedly connected with a key, the inner wall of the first transmission tooth 1801 and the second transmission tooth 2101 is formed with a key groove which is slidingly embedded in the key, under the action of the key and the key groove, the first transmission tooth 1801 and the second transmission tooth 2101 rotate synchronously with the transmission rod 11;

[0050] Please refer to Figure 4 、 Figures 6-8 , in the initial state, under the action of the transmission switching mechanism, the first transmission tooth 1801 is in meshing state with the first follow-up tooth 1201, the second transmission tooth 2101 is in separation state with the second follow-up tooth 2301, in this state, the first rotating sleeve 12 rotates synchronously with the transmission rod 11, the second rotating sleeve 23 is in static state, at this time, the limiting block 2801 is located at the end of the stroke of the spiral groove 2901 close to the sampler 15, under the action of the limiting block 2801 and the spiral groove 2901, the pushing rod 29 is located at the end of the stroke away from the sampler 15, so that the pushing disc 32 is maximally inserted into the sampler 15.

[0051] When sampling is needed, the lifting assembly drives the movable plate 3 to move downward, driving the connecting plate 7, the supporting plate 8 and the sampler 15 to move downward synchronously, so that the cutting end of the sampler 15 contacts the soil surface; at the same time, the motor 10 is started to drive the transmission rod 11 to rotate, through the first transmission tooth 1801 and the first follow-up tooth 1201 in meshing state, the first rotating sleeve 12 is driven to rotate, and then the hollow rod 14 and the sampler 15 fixed thereon are driven to rotate and cut through the first toothed belt 13, the sampler 15 is rotated into the soil under the combined action of rotation and downward pressure, and the collection of the soil sample is completed;

[0052] In this process, due to the second transmission gear 2101 and the second follow-up gear 2301 are in a state of separation, the push mechanism remains stationary, the push plate 32 is maintained in the initial retracted position in the sampler 15, leaving enough space for the sample.

[0053] When the sampler 15 reaches the preset sampling depth, it means that the sampling is completed, the lifting assembly is reversed, the movable plate 3 is lifted, driving the sampler 15 and the collected soil sample to separate from the soil, then the cylinder 9 is started, the control receiving plate 8 and the guide sleeve 6 move horizontally along the guide column 4, so that the sampler 15 moves above the designated drop position, in this moving process, the transmission switching mechanism acts, so that the first transmission gear 1801 and the first follow-up gear 1201 are disengaged, and the second transmission gear 2101 is driven to move to the position engaged with the second follow-up gear 2301.

[0054] After the transmission switching is completed, the motor 10 continues to work, the power is transmitted to the second rotating sleeve 23 through the transmission rod 11, the second transmission gear 2101 and the second follow-up gear 2301, and then the second gear belt 27 drives the rotating rod 28 to rotate, the rotating rod 28 will drive the limiting block 2801 to slide along the track of the spiral groove 2901, under the interaction of the limiting block 2801 and the spiral groove 2901, the rotating motion of the rotating rod 28 is converted into the linear motion of the push rod 29, and the push rod 29 will also drive the guide plate 31 to slide along the guide rod 30, because the guide rod 30 has a guide constraint effect, the push rod 29 can only slide along the axis of the rotating rod 28 and cannot rotate with the rotating rod 28.

[0055] Under the action of the push rod 29, the front end push plate 32 is driven to move smoothly in the sampler 15, so that the collected soil sample is completely pushed out, wherein the drop position can be provided with a rotary multi-station carrying table, when the push plate 32 pushes out the sample of the corresponding depth, the cutting knife rotating with the carrying table can cut off the sample at the corresponding position, and the next carrying table is controlled to move to the specified position, so as to realize the effect of segmented detection, the rotary multi-station carrying table is an application of the prior art, and will not be described here.

[0056] When the sample is completely pushed out, the motor 10 controls the transmission rod 11 to reverse, and the push mechanism is retracted under the reverse transmission action, at this time, the transmission switching mechanism is reset, and the parts of the device return to the initial state, preparing for the next sampling cycle.

[0057] Please refer to Figures 1-4 , Figures 6-9The transmission switching mechanism comprises a follower plate 16 sliding along the transmission rod 11 in the axial direction, a limiting wheel 25 rotatably mounted on the follower plate 16, an inclined plate 26 fixed on the support plate 5 and abutting against the limiting wheel 25, a limiting rod 33 fixed on the receiving plate 8 and penetrating through the follower plate 16, first and second support columns 17 and 20 fixed on both sides of the follower plate 16 and symmetrically arranged, first and second limiting rings 1701 and 2001 fixed at the ends of the first and second support columns 17 and 20, first and second sliding plates 18 and 21 slidably mounted on the first and second support columns 17 and 20, respectively, the first sliding plate 18 being rotatably connected with the first transmission tooth 1801, the second sliding plate 21 being rotatably connected with the second transmission tooth 2101, and the transmission rod 11 being sleeved with first, second and third springs 19, 22 and 24, the two ends of the first spring 19 being abutted against the follower plate 16 and the first sliding plate 18, respectively, the two ends of the second spring 22 being abutted against the follower plate 16 and the second sliding plate 21, respectively, and the two ends of the third spring 24 being abutted against the second sliding plate 21 and the connecting plate 7, respectively.

[0058] Please refer to Figure 4 、 Figures 6-8 Further, in the initial state, the follower plate 16 is located at the stroke end towards the side close to the receiving plate 8, at this time, the first sliding plate 18 is in abutment with the first limiting ring 1701, i.e. the spacing between the first sliding plate 18 and the follower plate 16 is maximum, the second sliding plate 21 is in abutment with the second limiting ring 2001, i.e. the spacing between the second sliding plate 21 and the follower plate 16 is also maximum, the elongation of the first spring 19 in the natural state is greater than the maximum spacing between the first sliding plate 18 and the follower plate 16, the elongation of the second spring 22 in the natural state is greater than the maximum spacing between the second sliding plate 21 and the follower plate 16, for this, the first and second springs 19 and 22 are in pre-compression state and respectively provide a pushing force to the first and second sliding plates 18 and 21 in the direction away from the follower plate 16, in this state, the first transmission tooth 1801 is in meshing state with the first follower tooth 1201, the second transmission tooth 2101 is in separation state with the second follower tooth 2301, and the spacing between the second sliding plate 21 and the connecting plate 7 is maximum, and the elongation of the third spring 24 in the natural state is greater than the maximum spacing between the second sliding plate 21 and the connecting plate 7, for this, the third spring 24 is in pre-compression state and always provides a pushing force to the second sliding plate 21 in the direction away from the connecting plate 7;

[0059] When sampling is needed, the first transmission gear 1801 is kept engaged with the first follower gear 1201 to transmit power, so as to realize the rotary cutting sampling of the sampler 15. When the sampling is completed, the lifting assembly drives the sampler 15 to rise and reset, the cylinder 9 is started, the receiving plate 8 and the connecting plate 7 are horizontally moved, the sampler 15 is moved to the material falling position, in the horizontal movement process, the receiving plate 8 drives the limiting wheel 25 to move towards the inclined plate 26, until the limiting wheel 25 abuts against the inclined surface of the inclined plate 26, with the continuous horizontal movement, the inclined surface of the inclined plate 26 forces the limiting wheel 25 and the follower plate 16 connected with the limiting wheel 25 to slide along the axial direction of the transmission rod 11, and move away from the receiving plate 8, the follower plate 16 drives the first sliding plate 18 to move through the first supporting column 17 and the first limiting ring 1701, so that the first transmission gear 1801 is disengaged from the first follower gear 1201.

[0060] At the same time, the movement of the follower plate 16 transmits force to the second sliding plate 21 through the second spring 22, so as to push the second transmission gear 2101 to move towards the second follower gear 2301, if the teeth of the second transmission gear 2101 are just aligned with the tooth grooves of the second follower gear 2301, the two gears are smoothly engaged, if the teeth and the tooth grooves are in a misaligned position, the second transmission gear 2101 and the second follower gear 2301 will be in a misaligned state and resist each other, preventing further movement, the follower plate 16 will continue to move, and the second sliding plate 21 will temporarily remain stationary, causing the second spring 22 to be further compressed and stored.

[0061] When the follower plate 16 moves to the stroke, the motor 10 works to drive the transmission rod 11 to slowly rotate, the transmission rod 11 drives the second transmission gear 2101 to rotate through the key connection, when the second transmission gear 2101 rotates to the position where the teeth are aligned with the tooth grooves of the second follower gear 2301, the compressed second spring 22 quickly releases the stored elastic potential energy, pushes the second sliding plate 21 and the second transmission gear 2101 to quickly move axially, and the second transmission gear 2101 is engaged with the second follower gear 2301.

[0062] Preferably, by separating first, aligning second, and engaging third, the accuracy of transmission can be ensured to avoid transmission interference, at the same time, through the storage and release of elastic potential energy, the problem of gear teeth can be avoided when adjusting the transmission state, so as to ensure the continuity and accuracy of the whole sampling process.

[0063] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0064] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An automatic sampling type soil moisture content detection device for smart agricultural irrigation, comprising: The sampling vehicle and the fixed plate fixed on the sampling vehicle are equipped with a lifting component, a movable plate connected to the lifting component, a guide column fixed on the movable plate, and a support plate fixed at the end of the guide column. Its characteristic is that it further includes: A guide sleeve is slidably mounted on the guide post, and a connecting plate and a receiving plate are fixed on the guide sleeve; A sampling mechanism is provided on the connecting plate, and a sampler is connected to the sampling mechanism. A pushing mechanism is also provided on the connecting plate, and a pushing disk that is slidably connected to the sampler is connected to the pushing mechanism. A transmission switching mechanism is provided on the sampling mechanism and connected to the pushing mechanism. The transmission switching mechanism is connected with a first transmission tooth and a second transmission tooth. The transmission switching mechanism can adjust the cooperation state between the first transmission tooth and the second transmission tooth and the sampling mechanism and the pushing mechanism to control the corresponding actions of the sampler and the pushing disk. The sampling mechanism includes a motor fixed on the connecting plate, and a transmission rod rotatably mounted on the connecting plate and connected to the output shaft of the motor; A first rotating sleeve and a hollow rod are rotatably mounted on the receiving plate. The hollow rod is fixedly connected to the sampler. A first follower tooth that abuts against the first transmission tooth is fixed at the end of the first rotating sleeve. A first toothed band that connects to the hollow rod is sleeved on the first rotating sleeve. The pushing mechanism includes a second rotating sleeve and a rotating rod rotatably mounted on the connecting plate. The end of the second rotating sleeve is fixed with a second follower tooth that abuts against the second transmission tooth. A second toothed band connected to the rotating rod is sleeved on the second rotating sleeve. The rotational motion of the rotating rod is converted into the linear motion of the push rod. Under the action of the push rod, the front push disk is driven to move smoothly forward in the sampler. The transmission switching mechanism includes a follower plate that slides along the axial direction of the transmission rod, a limit wheel that is rotatably mounted on the follower plate, an inclined plate that abuts against the limit wheel that is fixed on the support plate, and a limit rod that penetrates the follower plate that is fixed on the receiving plate. The follower plate is fixed with a first support column and a second support column arranged symmetrically on both sides. The ends of the first support column and the second support column are fixed with a first limiting ring and a second limiting ring, respectively. A first sliding plate and a second sliding plate are slidably installed on the first support column and the second support column, respectively. The first sliding plate is rotatably connected to the first transmission gear, and the second sliding plate is rotatably connected to the second transmission gear.

2. The soil moisture content detection device for automatic sampling type smart agricultural irrigation according to claim 1, characterized in that, It also includes a guide assembly and a guide component disposed on the connecting plate for driving the movement of the push plate.

3. The soil moisture content detection device for automatic sampling type smart agricultural irrigation according to claim 2, characterized in that, The guiding assembly includes a push rod that is slidably installed inside the rotating rod and passes through the connecting plate and the sampler. The push rod is fixedly connected to the push disk. A spiral groove is formed on the outer circumference of the push rod. A limiting block that slides and engages with the spiral groove is fixed on the inner wall of the rotating rod.

4. The soil moisture content detection device for automatic sampling type smart agricultural irrigation according to claim 3, characterized in that, The guide assembly includes a guide rod fixed to the connecting plate, and the guide rod has a guide plate that is fixedly connected to the push rod and slides axially.

5. The soil moisture content detection device for automatic sampling type smart agricultural irrigation according to claim 1, characterized in that, The transmission rod is fitted with a first spring, a second spring, and a third spring. The two ends of the first spring abut against the follower plate and the first sliding plate, respectively. The two ends of the second spring abut against the follower plate and the second sliding plate, respectively. The two ends of the third spring abut against the second sliding plate and the connecting plate, respectively.

6. The soil moisture content detection device for automatic sampling type smart agricultural irrigation according to claim 1, characterized in that, A cylinder is fixed on the support plate, and the telescopic end of the cylinder is fixedly connected to the receiving plate.

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