A soil detection discrimination device and method of use

Abstract

A kind of soil detection distinguishing device, first detection instrument, second detection instrument and third detection instrument arranged along the conveying direction of first conveying belt can respectively obtain the moisture content in the soil to be measured, cross-sectional area and mass parameter, the dry density in the soil to be measured is obtained by calculation, and then compared with the moisture content threshold value, cross-sectional area threshold value and dry density threshold value in control system, according to the comparison result, control system controls the screening body to be communicated with first discharge port or second discharge port at inlet end, so as to distribute the soil to be measured to clay or sandy soil collection area, realize the automatic detection and distinction of soil, eliminate manual sorting, improve work efficiency.

Description

A soil testing and differentiation device and its usage method Technical Field

[0001] This invention relates to the field of construction or civil engineering waste sorting and recycling technology, and in particular to a soil testing and differentiation device and its usage method. Background Technology

[0002] In construction or civil engineering projects, such as foundation excavation or foundation improvement, a large amount of construction waste is generated. In order to protect the environment and conserve soil resources, the construction waste generated from excavation at construction sites is now being reused as soil resources. Therefore, it is necessary to identify and classify the construction waste to screen out directly usable sandy soil and clayey soil that needs modification.

[0003] In existing technologies, soil quality is classified using the taper index and the engineering classification system of soil materials. The taper index is determined based on the taper penetration test, while the engineering classification of soil materials is determined based on the particle size distribution test. Nowadays, with continuous technological advancements, soil identification methods have become more diverse, including chemical analysis, spectroscopic detection techniques, and ultraviolet-visible spectrophotometry. However, chemical analysis is only widely used for heavy metal detection in soil; spectroscopic detection techniques are costly, have complex and time-consuming procedures, and require highly skilled equipment and personnel, making it difficult to quickly and accurately detect soil on-site; ultraviolet-visible spectrophotometry requires time-consuming soil sample pretreatment, making rapid on-site detection impossible and also incurring high costs.

[0004] In conclusion, using existing technologies to test and differentiate large quantities of construction or civil engineering waste is clearly time-consuming and costly. To recycle and reuse waste soil, conserve soil resources, and obtain soil that meets engineering requirements as much as possible, it is necessary to develop new, simple, and cost-effective soil testing and differentiation devices and methods. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a soil testing and differentiation device and a method of using it.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A soil testing and differentiation device is characterized in that it includes a first conveyor belt for conveying soil to be tested, the first conveyor belt having an inlet end and an outlet end, the inlet end being used to receive several samples of soil to be tested with the same volume, and a testing device assembly electrically connected to a control system being provided between the inlet end and the outlet end, the testing device assembly including a first testing instrument for detecting the moisture content of the soil to be tested within a specified area, a second testing instrument for detecting the surface undulations of the soil to be tested within a specified area, and a third testing instrument for detecting the quality of the soil to be tested within a specified area;

[0008] The discharge end is equipped with a screening device electrically connected to the control system. The screening device has an inlet end, a first discharge end, and a second discharge end. The inlet end is connected to the discharge end. The screening device includes a screening body. The control system controls the screening body to connect the inlet end to the first discharge end or the second discharge end. The first discharge end leads to the cohesive soil collection point, and the second discharge end leads to the sandy soil collection point.

[0009] Furthermore, the first testing instrument, the second testing instrument, and the third testing instrument are arranged sequentially along the conveying direction of the first conveyor belt.

[0010] Furthermore, the first testing instrument is a moisture meter, the second testing instrument is a laser scanner, and the third testing instrument is a conveyor belt scale.

[0011] Furthermore, a shaper is provided between the first and second testing instruments to shape the height of the soil to be tested.

[0012] Furthermore, the molding device is in the shape of a long strip or a long plate, and the height of the soil to be tested after being adjusted by the molding device is lower than the lowest point of the second detection instrument.

[0013] Furthermore, the feed end is provided with a hopper, and the outlet of the hopper is located above the first conveyor belt and upstream of the molding machine.

[0014] Furthermore, the screening body is a bidirectional conveyor belt electrically connected to the control system, the feed end is located in the middle of the bidirectional conveyor belt, and the two ends of the bidirectional conveyor belt respectively constitute the first discharge end and the second discharge end; by switching the movement direction of the bidirectional conveyor belt, the feed end is connected to the first discharge end or the second discharge end.

[0015] Furthermore, the time required for the soil to be tested to move from the third detection instrument to the discharge end on the first conveyor belt is T, the time required for the soil to be tested to move from the inlet end to the first discharge end or the second discharge end on the bidirectional conveyor belt is also T, and the interval between the placement of the soil to be tested is also T.

[0016] Furthermore, the screening device is a Y-shaped channel, which has an inlet end, a first discharge end, and a second discharge end; a lever electrically connected to the control system is provided at the intersection of the Y-shaped channel, the lever constitutes the screening body, and the reciprocating swing of the lever connects the inlet to the first discharge end or the second discharge end.

[0017] The present invention also proposes a method of using a soil testing and differentiation device, comprising a soil testing and differentiation device as described above, the method of using of which is as follows:

[0018] S1. Set the first conveyor belt to run at a constant speed, and transport n portions of soil samples A1, A2, ..., A with a volume of v to be tested. i A i+1 A n The material is poured into the feed end of the first conveyor belt at time intervals T.

[0019] S2. Each soil sample moves forward with the first conveyor belt, and the moisture content of each soil sample is measured sequentially by the first detection instrument and recorded as x1, x2, ..., x i x i+1 ... x n And sequentially store them into the control system;

[0020] S3. Each soil sample continues to move forward with the first conveyor belt. After the height of each soil sample is adjusted by the forming device, the cross-sectional area of ​​each soil sample is measured sequentially by the second detection instrument and recorded as y1, y2, ..., y3. i y i+1 ... y n And store it in the control system;

[0021] S3. The soil samples to be tested continue to move forward with the first conveyor belt, and the mass of each soil sample is measured by the third detection instrument and recorded as z1, z2, ..., z3. i z i+1 ... z n The data is stored in the control system; and the time required for each soil sample to be moved from the discharge end by the third detection instrument is set to T.

[0022] S4. The control system calculates the dry density p of each soil sample. i =z i ·(1-xi ) / v;

[0023] S5. The control system will control the water content x i Cross-sectional area y i and dry density p i Each is compared with its corresponding water content threshold X, cross-sectional area threshold Y, and dry density threshold P, if and only if x i <X、y i >Y and p i When P > P, the soil being tested is sandy soil; otherwise, it is clay soil.

[0024] S6, when two adjacent soil samples A are being tested i A i+1 When the soils are of the same type, the screening body ensures that the feed end is continuously connected to either the first or second discharge end; when two adjacent soils A to be tested... i A i+1 When the soil is of a different type and the test soil A is determined by the test soil itself. i+1 After a time T elapses, the control system controls the screening body to switch the feed end from being connected to the first discharge end to being connected to the second discharge end, or the screening body switches the feed end from being connected to the second discharge end to being connected to the first discharge end.

[0025] Furthermore, in step S5, the water content threshold X = 30% and the cross-sectional area threshold Y = 50cm² 2 And the dry density threshold P = 1.8 g / cm³ 3 .

[0026] The beneficial effects of this invention are:

[0027] This invention proposes a soil testing and differentiation device. A first, second, and third testing instrument, arranged along the conveying direction of a first conveyor belt, can respectively acquire the moisture content, cross-sectional area, and mass parameters of the soil to be tested. The dry density of the corresponding soil is calculated and then compared with the moisture content threshold, cross-sectional area threshold, and dry density threshold in the control system. Based on the comparison results, the control system controls the screening body to connect the feed end to the first or second discharge port, thereby distributing the soil to be tested to the cohesive or sandy soil collection area. This achieves automatic soil detection and differentiation, eliminating manual sorting and improving work efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of a soil detection and differentiation device according to the present invention;

[0030] Figure 2 is a side view of a soil detection and differentiation device according to the present invention;

[0031] Figure 3 is a front view of cohesive soil in a soil detection and differentiation device according to the present invention;

[0032] Figure 4 is a side view of cohesive soil in a soil detection and differentiation device according to the present invention;

[0033] Figure 5 is a front view of sandy soil in a soil detection and differentiation device of the present invention;

[0034] Figure 6 is a side view of sandy soil in a soil detection and differentiation device of the present invention;

[0035] Figure 7 is a schematic diagram of a screening device according to another embodiment of the soil detection and differentiation device of the present invention;

[0036] Figure 8 is a logic diagram of a method for using a soil testing and differentiation device according to the present invention;

[0037] In the diagram, 10 is the separating device; 20 is the first conveyor belt; 201 is the feed end; 202 is the discharge end; 30 is the detection device assembly; 301 is the first detection instrument; 302 is the second detection instrument; 303 is the third detection instrument; 40 is the screening device; 401 is the feed end; 4021 is the first discharge end; 4022 is the second discharge end; 402 is the screening body; 50 is the hopper; 601 is the cohesive soil collection box; 602 is the sandy soil collection box; 70 is the second conveyor belt; 80 is the soil to be tested; 90 is the control system; and 100 is the molding device. Detailed Implementation

[0038] The present invention will now be described in detail with reference to Figures 1-8.

[0039] A soil testing and differentiation device 10 includes a first conveyor belt 20 for conveying soil 80 to be tested. The first conveyor belt 20 has an inlet end 201 and an outlet end 202. The inlet end 201 is used to receive several samples of soil 80 of the same volume. A testing device assembly 30 electrically connected to a control system 90 is provided between the inlet end 201 and the outlet end 202. The testing device assembly 30 includes a first testing instrument 301 for detecting the moisture content of soil 80 in a specified area, a second testing instrument 302 for detecting the surface undulation of soil 80 in a specified area, and a third testing instrument 303 for detecting the mass of soil 80 in a specified area.

[0040] The discharge end 202 is equipped with a screening device 40 electrically connected to the control system 90. The screening device 40 is equipped with a feed end 401, a first discharge end 4021 and a second discharge end 4022. The feed end 401 is connected to the discharge end 202. The screening device 40 includes a screening body 402. The control system 90 controls the screening body 402 to connect the feed end 401 to the first discharge end 4021 or the second discharge end 4022. The first discharge end 202 leads to the cohesive soil collection point and the second discharge end 202 leads to the sandy soil collection point.

[0041] The present invention proposes a soil testing and differentiation device 10, in which a first testing instrument 301, a second testing instrument 302, and a third testing instrument 303, arranged along the conveying direction of the first conveyor belt 20, can respectively acquire the moisture content, cross-sectional area, and mass parameters of the soil to be tested 80. The dry density of the corresponding soil to be tested 80 is obtained by calculation, and then compared with the moisture content threshold, cross-sectional area threshold, and dry density threshold in the control system 90. According to the comparison result, the control system 90 controls the screening body 402 to connect the feed end 401 to the first discharge end 4021 or the second discharge end 4022, thereby distributing the soil to be tested 80 to the clay soil or sandy soil collection area, realizing automatic soil detection and differentiation, eliminating manual sorting, and improving work efficiency.

[0042] In this embodiment, the first testing instrument 301, the second testing instrument 302, and the third testing instrument 303 are arranged sequentially along the conveying direction of the first conveyor belt 20. The installation order of the three instruments can also be changed according to the actual construction conditions. Furthermore, the first testing instrument 301 is a moisture meter, the second testing instrument 302 is a laser scanner, and the third testing instrument 303 is a conveyor belt scale.

[0043] In this embodiment, the cohesive soil has a high moisture content, while the sandy soil has a low viscosity. Therefore, a moisture meter is used to measure the moisture content of the soil to be tested (80). The measurement principle of the moisture meter is to irradiate the soil to be tested (80) with fast neutrons generated by a radioactive isotope. The soil to be tested (80) will then produce thermal neutrons. The number of hydrogen atoms is measured to assess the number of thermal neutrons, and finally the moisture content of the soil to be tested (80) is obtained.

[0044] In this embodiment, cohesive soil has high viscosity and is prone to clumping. After being shaped by the molding machine 100, its cross-sectional area is small and unstable, as shown in Figures 3-4. Conversely, sandy soil has a large and stable cross-sectional area after shaping, as shown in Figures 5-6. Therefore, a laser scanner is used to scan the upper surface of the soil to be tested 80 to obtain the height distribution of the soil to be tested 80, thereby calculating the cross-sectional area of ​​the soil to be tested 80. Here, the cross-sectional area refers to the average cross-sectional area of ​​the soil to be tested 80, that is, the arithmetic mean of the cross-sectional areas at various points on the soil to be tested 80.

[0045] In this embodiment, cohesive soil has a relatively high water content and therefore a low dry density, while sandy soil has the opposite. Therefore, the mass of the soil sample 80 is obtained by conveyor belt weighing, and subsequently, the dry density of the soil sample 80 is determined.

[0046] In this embodiment, a shaper 100 is provided between the first detection instrument 301 and the second detection instrument 302 for shaping the height of the soil to be tested 80. Furthermore, the shaper 100 is in the shape of a strip or a long plate, and the height of the soil to be tested 80 after being shaped by the shaper 100 is lower than the lowest point of the second detection instrument 302, ensuring that the height of the soil to be tested 80 after being shaped is lower than the second detection instrument 302, and avoiding the soil to be tested 80 being too high and hitting the second detection instrument 302 during transportation, thus affecting the measurement results.

[0047] In this embodiment, the feed end 201 is provided with a hopper 50, and the outlet of the hopper 50 is located above the first conveyor belt 20 and upstream of the molding machine 100, which facilitates the rapid pouring of the soil 80 to be tested.

[0048] In this embodiment, the screening device 40 is a bidirectional conveyor belt electrically connected to the control system 90. At the same time, the bidirectional conveyor belt constitutes the screening body 402. The feed end 401 is located in the middle of the bidirectional conveyor belt, and the two ends of the bidirectional conveyor belt respectively constitute the first discharge end 4021 and the second discharge end 4022. By switching the movement direction of the bidirectional conveyor belt, the feed end 401 is connected to the first discharge end 4021 or the second discharge end 4022.

[0049] In this embodiment, the time required for the soil to be tested 80 to move from the third detection instrument 303 to the discharge end 202 on the first conveyor belt 20 is T. The time required for the soil to be tested 80 to move from the inlet end 401 to the first discharge end 4021 or the second discharge end 4022 on the bidirectional conveyor belt is also T. The soil to be tested 80 is placed on the first conveyor belt 20 at time intervals T. The reason for setting the time interval T is that during the detection process of the soil to be tested 80, there are two situations—two adjacent soils to be tested 80 are the same type of soil or different types of soil. Therefore, the movement direction of the bidirectional conveyor belt needs to be switched so that the inlet end 401 is connected to the first discharge end 4021 or the second discharge end 4022, as detailed below:

[0050] When two adjacent soil samples are at a temperature of 80°C, it is denoted as A. i A i+1 For soil of the same type, the bidirectional conveyor belt does not need to switch its direction of movement.

[0051] When two adjacent soil samples are at a temperature of 80°C, it is denoted as A. i A i+1 For different types of soil, let's assume A i It is cohesive soil, A i+1 It is sandy soil. When A i When the device moves to the third detection instrument 303, the control system 90 immediately determines A. i Given cohesive soil, after time T, A i The material moves from the first conveyor belt 20 to the discharge end 202 and lands on the bidirectional conveyor belt; simultaneously, A i+1 Moved to the third detection instrument 303, the control system 90 then determines A. i+1 It is sandy soil. Similarly, after time T, A i+1 The material moves from the first conveyor belt 20 to the discharge end 202 and lands on the bidirectional conveyor belt. At this time, A i The material has been moved by the bidirectional conveyor belt to the first discharge end 4021 and falls into the cohesive soil collection point. The bidirectional conveyor belt then switches its direction of movement, causing A to... i+1 Moving towards the second feeding end 4022, after time T, A i+1 It falls into the clay soil collection area.

[0052] Therefore, the control system 90 determines whether to switch the direction of movement of the bidirectional conveyor belt based on the type of soil to be tested 80 at every interval T, thereby ensuring that the soil to be tested 80 is accurately distributed to the cohesive soil collection point or the sandy soil collection point.

[0053] In other embodiments, as shown in FIG7, the screening device 40 is a Y-shaped channel, which is provided with a feed end 401, a first discharge end 4021 and a second discharge end 4022; at the intersection of the Y-shaped channel, there is a lever electrically connected to the control system 90, which constitutes the screening body 402. The reciprocating swing of the lever connects the feed end 401 to the first discharge end 4021 and the second discharge end 4022, so that the soil that has been tested is transported to the clay soil collection point or the sandy soil collection point.

[0054] Therefore, when two adjacent soil samples are 80, it is denoted as A. i A i+1 When the soil types are the same, no switching of the probe is required; when two adjacent soil samples are of different types, assume A i It is cohesive soil, A i+1 The soil is sandy. When the control system determines A at 90... i When dealing with cohesive soil, the lever swings to the left, at which point the feed end 401 is connected to the first discharge end 4021, A i Leading to the cohesive soil collection point; after time interval T, the control system 90 determines A. i+1 The soil is sandy. The lever is then swung to the right, at which point the feed end 401 connects to the second discharge end 4022. (A) i+1 Leading to the sandy soil collection point, and so on.

[0055] In this embodiment, a cohesive soil collection box 601 is provided at the cohesive soil collection point, and a sandy soil collection box 602 is provided at the sandy soil collection point. A second conveyor belt 70 is provided between the first discharge end 4021 and the cohesive soil collection box 601, and between the second discharge end 4022 and the sandy soil collection box 602.

[0056] The present invention also proposes a method of using a soil testing and differentiation device 10, comprising a soil testing and differentiation device 10 as described above, the method of using of which is as follows:

[0057] S1. Set the first conveyor belt 20 to run at a constant speed, and transport n portions of soil sample 80 with a volume of v to be tested, denoted as A1, A2, ..., A6. i A i+1 A n The material is poured into the feed end 201 of the first conveyor belt 20 at time intervals T.

[0058] S2. Each soil sample 80 moves forward with the first conveyor belt 20, and the first testing instrument 301 sequentially measures the moisture content of each soil sample 80, denoted as x1, x2, ..., x... i x i+1 ... x n And sequentially store them into the control system 90;

[0059] S3. Each soil sample 80 continues to move forward with the first conveyor belt 20. After the height of each soil sample 80 is adjusted by the molding device 100, the cross-sectional area of ​​each soil sample 80 is measured sequentially by the second detection instrument 302 and recorded as y1, y2, ..., y3. i y i+1 ... y n And store it in the control system 90;

[0060] S3. The soil samples 80 to be tested continue to move forward with the first conveyor belt 20, and the mass of each soil sample 80 is measured by the third testing instrument 303 and recorded as z1, z2, ..., z3. i z i+1 ... z n The data is stored in the control system 90; and the time required for each soil sample 80 to be tested to move from the third detection instrument 303 to the discharge end 202 is set as T.

[0061] S4. The dry density p of each soil sample 80 is calculated by the control system 90. i =z i ·(1-x i ) / v;

[0062] S5, Control System 90 will adjust the water content x i Cross-sectional area y i and dry density p i Each is compared with its corresponding water content threshold X, cross-sectional area threshold Y, and dry density threshold P, if and only if x i <X、y i >Y and p i When P > 80, the soil to be tested is sandy soil; otherwise, it is clay soil.

[0063] S6. When two adjacent soil samples are at 80, it is recorded as A. i A i+1 When the soils are of the same type, the screening body 402 ensures that the feed end 401 is continuously connected to the first discharge end 4021 or the second discharge end 4022; when two adjacent soils 80 to be tested are of different types and the soil to be tested A is automatically determined... i+1 After a time T has elapsed since the soil type was determined, the control system 90 controls the screening body 402 to switch the feed end 401 from being connected to the first discharge end 4021 to being connected to the second discharge end 4022, or the screening body 402 switches the feed end 401 from being connected to the second discharge end 4022 to being connected to the first discharge end 4021.

[0064] In this embodiment, in step S5, the water content threshold X = 30% and the cross-sectional area threshold Y = 50cm². 2 And the dry density threshold P = 1.8 g / cm³ 3 .

[0065] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A soil testing and differentiation device, characterized in that, The system includes a first conveyor belt for transporting soil samples for testing. The first conveyor belt has an inlet end and an outlet end. The inlet end receives several soil samples of equal volume. A detection device assembly electrically connected to a control system is located between the inlet and outlet ends. The detection device assembly includes a first detection instrument for detecting the moisture content of the soil sample within a specified area, a second detection instrument for detecting surface undulations of the soil sample within the specified area, and a third detection instrument for detecting the quality of the soil sample within the specified area. A forming device is located between the first and second detection instruments for... The soil is shaped to measure its height. The shaping device is long and narrow, and the height of the soil to be tested after being shaped by the shaping device is lower than the lowest point of the second detection instrument. The discharge end is equipped with a screening device electrically connected to the control system. The screening device has an inlet end, a first discharge end, and a second discharge end. The inlet end is connected to the discharge end. The screening device includes a screening body. The control system controls the screening body to connect the inlet end to the first discharge end or the second discharge end. The first discharge end leads to the cohesive soil collection point, and the second discharge end leads to the sandy soil collection point.

2. The soil testing and differentiation device as described in claim 1, characterized in that, The first testing instrument, the second testing instrument, and the third testing instrument are arranged sequentially along the conveying direction of the first conveyor belt.

3. The soil testing and differentiation device as described in claim 2, characterized in that, The first testing instrument is a moisture meter, the second testing instrument is a laser scanner, and the third testing instrument is a conveyor belt scale.

4. The soil testing and differentiation device as described in claim 2, characterized in that, The feed end is equipped with a hopper, and the outlet of the hopper is located above the first conveyor belt and upstream of the molding machine.

5. A soil testing and differentiation device as described in claim 2, characterized in that, The screening body is a bidirectional conveyor belt electrically connected to the control system. The feed end is located in the middle of the bidirectional conveyor belt, and the two ends of the bidirectional conveyor belt respectively constitute the first discharge end and the second discharge end. By switching the movement direction of the bidirectional conveyor belt, the feed end is connected to the first discharge end or the second discharge end.

6. The soil testing and differentiation device as described in claim 5, characterized in that, The time required for the soil to be tested to move from the third detection instrument to the discharge end on the first conveyor belt is T. The time required for the soil to be tested to move from the inlet end to the first discharge end or the second discharge end on the bidirectional conveyor belt is also T. The interval between the placement of the soil to be tested is also T.

7. The soil testing and differentiation device as described in claim 1, characterized in that, The screening device is a Y-shaped channel, which has an inlet end, a first discharge end and a second discharge end. At the intersection of the Y-shaped channel, there is a lever electrically connected to the control system. The lever constitutes the screening body. The reciprocating swing of the lever connects the inlet end to the first discharge end or the second discharge end.

8. A method of using a soil testing and differentiation device, characterized in that, Including a soil testing and differentiation device as described in any one of claims 1-7, the method of use is as follows: S1, setting the first conveyor belt to run at a constant speed, and transporting n portions of soil samples A1, A2, ..., A6 with a volume of v to be tested. i A i+1 A n S2, the soil samples are poured onto the feed end of the first conveyor belt at time intervals T; S3, each soil sample moves forward with the first conveyor belt, and the moisture content of each soil sample is measured sequentially by the first detection instrument and recorded as x1, x2, ..., x3. i x i+1 ... x n The data are sequentially stored in the control system; S3, each soil sample continues to move forward with the first conveyor belt, and after the height of each soil sample is adjusted by the molding device, the cross-sectional area of ​​each soil sample is sequentially measured by the second detection instrument and recorded as y1, y2, ..., y3. i y i+1 ... y n The data is stored in the control system; S3, the soil to be tested continues to move forward with the first conveyor belt, and the mass of each soil sample is measured by the third detection instrument and recorded as z1, z2, ..., z i z i+1 ... z n The data is stored in the control system; and the time required for each soil sample to be moved from the discharge end by the third detection instrument is set to T; S4, the dry density p of each soil sample is calculated by the control system. i =z i ·(1-x i S5, The control system will control the water content x i Cross-sectional area y i and dry density p i Each is compared with its corresponding water content threshold X, cross-sectional area threshold Y, and dry density threshold P, if and only if x i <X、y i >Y and p i When >P, the soil being tested is sandy soil; otherwise, it is clay soil. S6, when two adjacent soil samples A... i A i+1 When the soils are of the same type, the screening body ensures that the feed end is continuously connected to either the first or second discharge end; when two adjacent soils A to be tested... i A i+1 When the soil is of a different type and the test soil A is determined by the test soil itself. i+1 After a time T elapses, the control system controls the screening body to switch the feed end from being connected to the first discharge end to being connected to the second discharge end, or the screening body switches the feed end from being connected to the second discharge end to being connected to the first discharge end.

9. The method of using the soil testing and differentiation device as described in claim 8, characterized in that, In step S5, the water content threshold X = 30% and the cross-sectional area threshold Y = 50 cm² 2 And the dry density threshold P = 1.8 g / cm³ 3 .

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