CN115389740A - Soil moisture content detection device and method - Google Patents

Soil moisture content detection device and method Download PDF

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Publication number
CN115389740A
CN115389740A CN202211042025.9A CN202211042025A CN115389740A CN 115389740 A CN115389740 A CN 115389740A CN 202211042025 A CN202211042025 A CN 202211042025A CN 115389740 A CN115389740 A CN 115389740A
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CN
China
Prior art keywords
motor
fixedly connected
plate
connecting rod
water
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Pending
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CN202211042025.9A
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Chinese (zh)
Inventor
陈军锋
苗春燕
孔令儒
郑秀清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Lyujing Environmental Protection Technology Engineering Co ltd
Taiyuan University of Technology
Original Assignee
Shanxi Lyujing Environmental Protection Technology Engineering Co ltd
Taiyuan University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shanxi Lyujing Environmental Protection Technology Engineering Co ltd, Taiyuan University of Technology filed Critical Shanxi Lyujing Environmental Protection Technology Engineering Co ltd
Priority to CN202211042025.9A priority Critical patent/CN115389740A/en
Publication of CN115389740A publication Critical patent/CN115389740A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44Sample treatment involving radiation, e.g. heat

Abstract

The invention discloses a soil moisture content detection device and a method, which comprises a treatment tank and is characterized in that: the utility model discloses a handle, including the treatment trough, the treatment trough is provided with the arc wall, the both ends fixed connection riser two of treatment trough, one two fixed connection supports of riser, support fixed connection backup pad, backup pad both sides fixed connection long slab and short slab, long slab fixed connection motor two, the output shaft of motor two passes the long slab, the output shaft fixed connection plectane of motor two, the eccentric department of plectane rotates the one end of connecting rod three. The invention relates to the field of detection equipment, in particular to a device and a method for detecting soil moisture content. The invention aims to provide a device and a method for detecting the soil moisture content, which are convenient for detecting the soil moisture content.

Description

Soil moisture content detection device and method
Technical Field
The invention relates to the field of detection equipment, in particular to a device and a method for detecting soil moisture content.
Background
Water is an important component of soil and an important guarantee for the growth of crops, and excessive and insufficient water content of the soil is not beneficial to the growth of the crops. Fresh water resources in China are not abundant, and efficient and reasonable utilization of the water resources is an important subject to be solved by modern domestic agriculture. To save agricultural irrigation water, the soil moisture must be known. The agricultural method for accurately measuring the water content of the soil has important significance.
At present, when soil moisture is detected, soil is mainly crushed and naturally dried to obtain moisture content. In this way, the efficiency is low.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the soil moisture content, which are convenient for detecting the soil moisture content.
The invention adopts the following technical scheme to realize the purpose of the invention:
a soil moisture content detection device and method comprises a treatment tank and is characterized in that: the utility model discloses a processing tank, including the treatment trough, the treatment trough is provided with the arc wall, two both ends fixed connection risers of treatment trough, one two fixed connection supports of riser, support fixed connection backup pad, backup pad both sides fixed connection long slab and short slab, long slab fixed connection motor two, the output shaft of motor two passes the long slab, the output shaft fixed connection plectane of motor two, the eccentric department of plectane rotates the one end of connecting rod three, the short slab rotates the one end of connecting rod two, the other end of connecting rod three rotates and connects connecting rod two, the other end fixed connection arc piece of connecting rod two, the arc piece is provided with the recess, connecting rod two sets up in the recess, a set of heating piece of treatment trough fixed connection.
As a further limitation of the technical scheme, the treatment tank is fixedly connected with the electronic scale, the electronic scale is fixedly connected with the bottom plate, the bottom plate is fixedly connected with the first vertical plate, the first vertical plate is fixedly connected with the top plate, the top plate is fixedly connected with the motor support, the top plate is fixedly connected with the vertical rod, the top plate is fixedly connected with the square plate, the square plate is provided with symmetrical first arc-shaped grooves, and the first square plate is provided with a convex groove.
As a further limitation of the technical scheme, the motor bracket is fixedly connected with the first motor, an output shaft of the first motor is fixedly connected with one end of the first connecting rod, and the other end of the first connecting rod is fixedly connected with the second round rod.
As a further limitation of the technical scheme, the vertical rod penetrates through one end of the sliding groove, the round rod II is arranged in the sliding groove, the round rod I is arranged in the arc-shaped groove I, the round rod I is arranged in the sliding groove, the round rod I is fixedly connected with the square rod, the square rod penetrates through the circular block, the circular block is fixedly connected with the convex block, and the convex block is arranged in the convex groove.
As a further limitation of the technical scheme, the square rod is fixedly connected with a water pipe, and the water pipe is fixedly communicated with a group of spray heads.
A soil moisture content detection method is characterized by comprising the following steps:
the method comprises the following steps: placing soil into the second arc-shaped groove, and recording initial data of the electronic scale;
step two: the second motor is started, and the arc-shaped blocks are driven by related elements to swing to and fro to roll soil;
step three: the motor is turned on to rotate at a slow speed, the spray head is driven by related elements to swing in a reciprocating mode, a small amount of water is supplied to the water pipe, the spray head sprays water, and the arc-shaped blocks stir the soil and the water to enable the soil and the water to be fully mixed;
step four: opening the heating block to heat the treatment tank, rapidly evaporating water, and controlling the motor to rotate intermittently until the indication of the electronic scale is not changed;
step five: calculating the water content according to the original data and the final data;
step six: and opening the second motor, controlling the first motor to rotate quickly, supplying a large amount of water to the water pipe, flushing the treatment tank with water, and flushing the treatment tank with water.
As a further limitation of the technical solution, when the second motor is turned on, the second motor drives the circular plate to rotate, the circular plate drives the third connecting rod to swing back and forth, the third connecting rod drives the second connecting rod to swing back and forth, and the second connecting rod drives the arc-shaped block to swing back and forth.
As the further limited of this technical scheme, open during the motor, the motor drives connecting rod one is reciprocal pendulum, connecting rod one drives two edges of round bar the spout reciprocating swing, two drive of round bar the spout is followed montant reciprocating motion, the spout drives one edge of round bar the arc wall is one and spout reciprocating motion, round bar one drives square bar reciprocating swing is followed simultaneously along returning the shape piece reciprocating motion, the square bar drives returning shape piece reciprocating motion, returning the shape piece and driving the shape piece along protruding groove reciprocating motion, the square bar drives the water pipe and the reciprocal swing of shower nozzle.
As a further limitation of the present invention, the shower head is matched to the processing bath.
As a further limitation of the present technical solution, the material of the bottom plate is cast iron.
Compared with the prior art, the invention has the advantages and positive effects that:
1. this device is through setting up motor two, under the drive of relevant component, realizes the arc piece along two reciprocating oscillations of arc wall, realizes rolling to soil, realizes that soil is broken, supplies water a small amount through the feed pipe, and the shower nozzle swing blowout, the reciprocating oscillation of arc piece makes water and soil fully contact, makes soil normal water fully contact with shower nozzle spun water, through heating the piece heating, realizes moisture rapid evaporation.
2. This device is through setting up motor one, through the rotational speed of control motor one and the water supply capacity of water pipe, realizes handling soil and treatment tank, and a motor rotational speed is slow, when the delivery pipe supplies water in a small amount, conveniently realizes water and soil contact, makes soil normal water and shower nozzle blowout water mix, makes things convenient for subsequent processing, a motor rotational speed piece, when the delivery pipe supplies water in a large number, conveniently realizes handling tank and arc piece cleaning process.
3. This device realizes the short-term test of soil moisture through design ingeniously to and the quick clearance of treatment trough, the convenient next detection.
Drawings
Fig. 1 is a schematic perspective view of the first embodiment of the present invention.
Fig. 2 is a schematic perspective view of the second embodiment of the present invention.
Fig. 3 is a partial perspective view of the first embodiment of the present invention.
Fig. 4 is a partial perspective view of the second embodiment of the present invention.
Fig. 5 is a schematic partial perspective view illustrating a third embodiment of the present invention.
Fig. 6 is a partial perspective view illustrating a fourth embodiment of the present invention.
Fig. 7 is a schematic partial perspective view of the present invention.
Fig. 8 is a schematic diagram six of a partial three-dimensional structure of the present invention.
In the figure: 1. the device comprises a top plate, 2, first vertical plates, 3, a bottom plate, 4, an electronic scale, 5, a processing groove, 6, a heating block, 7, a motor support, 8, a first motor, 9, a square plate, 10, a first arc-shaped groove, 11, a vertical rod, 13, a first round rod, 14, a convex groove, 15, a first connecting rod, 16, a sliding groove, 17, a second round rod, 18, a water pipe, 19, a spray head, 20, a square rod, 21, a convex block, 22, a clip block, 23, a support, 24, a second arc-shaped groove, 25, a second vertical plate, 26, a support plate, 27, a long plate, 28, a second motor, 29, a short plate, 30, a second connecting rod, 31, a groove, 32, an arc-shaped block, 33, a third connecting rod, 34 and a round plate.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
The device comprises a treatment tank 7, wherein an arc-shaped groove 24 is formed in the treatment tank 5, two vertical plates 25 are fixedly connected to two ends of the treatment tank 5, one vertical plate 25 is fixedly connected to a support 23, the support 23 is fixedly connected to a support plate 26, a long plate 27 and a short plate 29 are fixedly connected to two sides of the support plate 26, the long plate 27 is fixedly connected to a motor 28, an output shaft of the motor 28 penetrates through the long plate 27, an output shaft of the motor 28 is fixedly connected to a circular plate 34, an eccentric position of the circular plate 34 is rotatably connected to one end of a connecting rod three 33, the short plate 29 is rotatably connected to one end of a connecting rod two 30, the other end of the connecting rod three 33 is rotatably connected to the connecting rod two 30, the other end of the connecting rod two 30 is fixedly connected to an arc-shaped block 32, the arc-shaped block 32 is provided with a groove 31, the connecting rod two 30 is arranged in the groove 31, and the treatment tank 5 is fixedly connected to a group of heating blocks 6.
The processing tank 5 is fixedly connected with an electronic scale 4, the electronic scale 4 is fixedly connected with a bottom plate 3, the bottom plate 3 is fixedly connected with a first vertical plate 2, the vertical plate 2 is fixedly connected with a top plate 1, the top plate 1 is fixedly connected with a motor support 7, the top plate 1 is fixedly connected with a vertical rod 11, the top plate 1 is fixedly connected with a square plate 9, the square plate 9 is provided with a symmetrical arc-shaped groove 10, and the square plate 9 is provided with a convex groove 14.
The motor support 7 is fixedly connected with a first motor 8, an output shaft of the first motor 8 is fixedly connected with one end of a first connecting rod 15, and the other end of the first connecting rod 15 is fixedly connected with a second round rod 17.
The vertical rod 11 penetrates through one end of the sliding groove 16, the round rod II 17 is arranged in the sliding groove 16, the round rod I13 is arranged in the arc-shaped groove I10, the round rod I13 is arranged in the sliding groove 16, the round rod I13 is fixedly connected with the square rod 20, the square rod 20 penetrates through the return block 22, the return block 22 is fixedly connected with the convex block 21, and the convex block 21 is arranged in the convex groove 14.
The square rod 20 is fixedly connected with a water pipe 18, and the water pipe 18 is fixedly communicated with a group of spray heads 19.
A method for detecting the moisture content of soil comprises the following steps:
the method comprises the following steps: placing soil into the second arc-shaped groove 24, and recording initial data of the electronic scale 4;
step two: the second motor 28 is turned on, and the arc-shaped block 32 is driven by related elements to swing back and forth to roll soil;
step three: the first motor 8 is turned on to rotate slowly, the spray head 19 is driven by related elements to swing in a reciprocating mode, a small amount of water is supplied to the water pipe 18, the spray head 19 sprays water, and the arc-shaped blocks 32 stir the soil and the water to enable the soil and the water to be mixed fully;
step four: opening the heating block 6 to heat the treatment tank 5, quickly evaporating water, and controlling the first motor 8 and the second motor 28 to intermittently rotate until the indication of the electronic scale 4 is not changed;
step five: calculating the water content according to the original data and the final data;
step six: and (3) turning on the second motor 28, controlling the first motor 8 to rotate quickly, supplying a large amount of water to the water pipe 18, flushing the treatment tank 5 with the water, and flushing the treatment tank 5 with the water.
When the second motor 28 is turned on, the second motor 28 drives the circular plate 34 to rotate, the circular plate 34 drives the third connecting rod 33 to swing in a reciprocating manner, the third connecting rod 33 drives the second connecting rod 30 to swing in a reciprocating manner, and the second connecting rod 30 drives the arc-shaped block 32 to swing in a reciprocating manner.
When the first motor 8 is turned on, the first motor 8 drives the first connecting rod 15 to swing back and forth, the first connecting rod 15 drives the second round rod 17 to swing back and forth along the sliding groove 16, the second round rod 17 drives the sliding groove 16 to move back and forth along the vertical rod 11, the sliding groove 16 drives the first round rod 13 to move back and forth along the first arc-shaped groove 10 and the sliding groove 16, the first round rod 13 drives the square rod 20 to swing back and forth and simultaneously move back and forth along the return block 22, the square rod 20 drives the return block 22 to move back and forth, the return block 22 drives the convex block 21 to move back and forth along the convex groove 14, and the square rod 20 drives the water pipe 18 and the spray head 19 to swing back and forth.
The shower head 19 is matched to the treatment tank 5.
The bottom plate 3 is made of cast iron.
The working process of the invention is as follows: and placing the soil into the second arc-shaped groove 24, and recording initial data of the electronic scale 4.
The second motor 28 is turned on, and the arc-shaped blocks 32 are driven by related elements to swing back and forth to roll soil. When the second motor 28 is turned on, the second motor 28 drives the circular plate 34 to rotate, the circular plate 34 drives the third connecting rod 33 to swing in a reciprocating manner, the third connecting rod 33 drives the second connecting rod 30 to swing in a reciprocating manner, and the second connecting rod 30 drives the arc-shaped block 32 to swing in a reciprocating manner.
The first motor 8 is turned on to rotate slowly, the spray head 19 is driven by related elements to swing back and forth, a small amount of water is supplied to the water supply pipe 18, the spray head 19 sprays water, and the arc-shaped blocks 32 stir soil and water to enable the soil and the water to be fully mixed. When the first motor 8 is turned on, the first motor 8 drives the first connecting rod 15 to swing in a reciprocating manner, the first connecting rod 15 drives the second round rod 17 to swing in a reciprocating manner along the sliding groove 16, the second round rod 17 drives the sliding groove 16 to move in a reciprocating manner along the vertical rod 11, the sliding groove 16 drives the first round rod 13 to move in a reciprocating manner along the first arc-shaped groove 10 and the sliding groove 16, the first round rod 13 drives the square rod 20 to swing in a reciprocating manner and to move in a reciprocating manner along the square-shaped block 22, the square rod 20 drives the square-shaped block 22 to move in a reciprocating manner, the square rod 22 drives the convex block 21 to move in a reciprocating manner along the convex groove 14, and the square rod 20 drives the water pipe 18 and the spray head 19 to swing in a reciprocating manner.
And opening the heating block 6 to heat the treatment tank 5 to quickly evaporate water, and controlling the second motor 28 to intermittently rotate until the display of the electronic scale 4 is not changed.
And calculating the water content according to the original data and the final data.
And (3) turning on the second motor 28, controlling the first motor 8 to rotate quickly, and supplying a large amount of water to the water supply pipe 18 to flush the treatment tank 5 with water so as to flush the treatment tank 5 with water.
This device is through setting up two 28 motors, under the drive of relevant component, realizes the reciprocal swing of arc piece 32 along two 24 arc walls, realizes rolling to soil, realizes that soil is broken, supplies water a small amount through the feed pipe 18, and 19 swings the blowout of shower nozzle, and the reciprocal swing of arc piece 32 makes water and soil fully contact, makes the soil normal water fully contact with 19 spun water of shower nozzle, heats through heating block 6, realizes moisture rapid evaporation.
This device is through setting up motor 8, through the rotational speed of control motor 8 and the water supply of water pipe 18, realizes handling soil and treatment tank 5, and a motor 8 rotational speed is slow, and when 18 a small amount of water supplies water of delivery pipe, conveniently realize water and soil contact, make soil normal water mix with 19 spouting waters of shower nozzle, convenient subsequent processing, motor 8 rotational speed piece, when 18 a large amount of water supplies water of delivery pipe, conveniently realize handling tank 5 and arc piece 32 cleaning process.
This device realizes the short-term test of soil moisture through design ingeniously to and the quick clearance of treatment trough 5, the convenient next detection.
The above disclosure is only for the specific embodiment of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art should fall within the scope of the present invention.

Claims (10)

1. A soil moisture content detection device and method comprises a treatment tank (5), and is characterized in that:
the treatment tank (5) is provided with an arc-shaped groove (24), two ends of the treatment tank (5) are fixedly connected with a second vertical plate (25), and one second vertical plate (25) is fixedly connected with the support (23);
the support (23) is fixedly connected with a support plate (26), and a long plate (27) and a short plate (29) are fixedly connected to two sides of the support plate (26);
the long plate (27) is fixedly connected with a second motor (28), an output shaft of the second motor (28) penetrates through the long plate (27), an output shaft of the second motor (28) is fixedly connected with a circular plate (34), and an eccentric part of the circular plate (34) is rotatably connected with one end of a third connecting rod (33);
the short plate (29) is rotatably connected with one end of a second connecting rod (30), the other end of a third connecting rod (33) is rotatably connected with the second connecting rod (30), and the other end of the second connecting rod (30) is fixedly connected with an arc-shaped block (32);
the arc-shaped block (32) is provided with a groove (31), and the second connecting rod (30) is arranged in the groove (31);
the treatment tank (5) is fixedly connected with a group of heating blocks (6).
2. The soil moisture content detection device according to claim 1, characterized in that: the processing tank (5) is fixedly connected with an electronic scale (4), the electronic scale (4) is fixedly connected with a bottom plate (3), the bottom plate (3) is fixedly connected with a vertical plate (2), the vertical plate (2) is fixedly connected with a top plate (1), the top plate (1) is fixedly connected with a motor support (7), the top plate (1) is fixedly connected with a vertical rod (11), the top plate (1) is fixedly connected with a square plate (9), the square plate (9) is provided with a symmetrical arc-shaped groove (10), and the square plate (9) is provided with a convex groove (14).
3. The soil moisture content detection device according to claim 2, characterized in that: the motor support (7) is fixedly connected with a first motor (8), an output shaft of the first motor (8) is fixedly connected with one end of a first connecting rod (15), and the other end of the first connecting rod (15) is fixedly connected with a second round rod (17).
4. The soil moisture content detection device according to claim 3, characterized in that: the utility model provides a novel structure, including the montant (11), round bar two (17) set up in spout (16), be provided with round bar (13) in arc wall (10), round bar (13) set up in spout (16), round bar (13) fixed connection square pole (20), square pole (20) pass back piece (22), back piece (22) fixed connection convex block (21), convex block (21) set up in convex groove (14).
5. The soil moisture content detection device according to claim 4, characterized in that: the square rod (20) is fixedly connected with a water pipe (18), and the water pipe (18) is fixedly communicated with a group of spray heads (19).
6. The soil moisture content detection method according to claim 5, comprising the steps of:
the method comprises the following steps: placing soil into the second arc-shaped groove (24), and recording initial data of the electronic scale (4);
step two: the second motor (28) is turned on, and the arc-shaped block (32) is driven by related elements to swing to roll soil in a reciprocating manner;
step three: the first motor (8) is turned on to rotate slowly, the spray head (19) is driven by related elements to swing in a reciprocating mode, a small amount of water is supplied to the water pipe (18), the spray head (19) sprays water, and the arc-shaped blocks (32) stir soil and water to enable the soil and the water to be fully mixed;
step four: opening the heating block (6), heating the treatment tank (5), rapidly evaporating water, and controlling the second motor (28) to intermittently rotate until the indication number of the electronic scale (4) is not changed;
step five: calculating the water content according to the original data and the final data;
step six: and (3) turning on the second motor (28), controlling the first motor (8) to rotate quickly, supplying a large amount of water to the water pipe (18), and flushing the treatment tank (5) with water to completely flush the treatment tank (5) with water.
7. The soil moisture content detection method according to claim 6, characterized in that: when the second motor (28) is turned on, the second motor (28) drives the circular plate (34) to rotate, the circular plate (34) drives the third connecting rod (33) to swing in a reciprocating mode, the third connecting rod (33) drives the second connecting rod (30) to swing in a reciprocating mode, and the second connecting rod (30) drives the arc-shaped block (32) to swing in a reciprocating mode.
8. The soil moisture content detection method according to claim 6, characterized in that: when the first motor (8) is opened, the first motor (8) drives the first connecting rod (15) to swing back and forth, the first connecting rod (15) drives the second round rod (17) to swing back and forth along the sliding groove (16), the second round rod (17) drives the sliding groove (16) to move back and forth along the vertical rod (11), the sliding groove (16) drives the first round rod (13) to move back and forth along the first arc-shaped groove (10) and the sliding groove (16), the first round rod (13) drives the square rod (20) to swing back and forth along the return block (22), the square rod (20) drives the return block (22) to move back and forth, the return block (22) drives the convex block (21) to move back and forth along the convex groove (14), and the square rod (20) drives the water pipe (18) and the spray head (19) to swing back and forth.
9. The soil moisture content detection method according to claim 6, characterized in that: the spray head (19) is matched with the processing tank (5).
10. The soil moisture content detection method according to claim 6, characterized in that: the bottom plate (3) is made of cast iron.
CN202211042025.9A 2022-08-29 2022-08-29 Soil moisture content detection device and method Pending CN115389740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211042025.9A CN115389740A (en) 2022-08-29 2022-08-29 Soil moisture content detection device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211042025.9A CN115389740A (en) 2022-08-29 2022-08-29 Soil moisture content detection device and method

Publications (1)

Publication Number Publication Date
CN115389740A true CN115389740A (en) 2022-11-25

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Application Number Title Priority Date Filing Date
CN202211042025.9A Pending CN115389740A (en) 2022-08-29 2022-08-29 Soil moisture content detection device and method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108519477A (en) * 2018-04-24 2018-09-11 西南科技大学 A kind of frozen ground regions roadbed model pilot system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108519477A (en) * 2018-04-24 2018-09-11 西南科技大学 A kind of frozen ground regions roadbed model pilot system
CN108519477B (en) * 2018-04-24 2023-10-13 西南科技大学 Seasonal frozen soil area roadbed model test system

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