CN109001433B - deep soil moisture punching measurement method - Google Patents
deep soil moisture punching measurement method Download PDFInfo
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- CN109001433B CN109001433B CN201810713676.3A CN201810713676A CN109001433B CN 109001433 B CN109001433 B CN 109001433B CN 201810713676 A CN201810713676 A CN 201810713676A CN 109001433 B CN109001433 B CN 109001433B
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Abstract
The invention relates to a deep soil moisture perforation measuring method which is characterized by comprising a plurality of limiting pipes (6), a plurality of holes, a plurality of automatic perforation measuring devices and a control receiver (8), wherein limiting pipes (6) are placed in each hole, automatic perforation measuring devices (9) are arranged in each limiting pipe (6), and the control receiver (8) synchronously controls each automatic perforation measuring device (9) to simultaneously perforate, simultaneously measure and transmit measured data.
Description
Technical Field
The invention relates to a method for researching the response relation of soil moisture change to a hydrological process in a changing environment, belongs to the field of hydrological research methods, and particularly relates to a deep soil moisture punching measuring method.
Background
The section soil moisture measuring system is based on a time domain reflection technology of a section soil moisture sensor and is used for directly measuring the dielectric constant of soil or other media, the dielectric constant is closely related to the content of soil moisture, and the soil moisture content can be calculated and displayed by a reading system through analog voltage output.
However, when the profile soil moisture measuring system is used for measuring deeper soil moisture, the probe times of accurate insertion of the probe of the profile soil moisture measuring system into the pre-punched hole cannot be guaranteed by the matched pre-punching device, which may cause damage to the probe of the profile soil moisture measuring system.
However, in view of the limited field operation conditions and the limited number of workers, and the influence of field temperature difference and water evaporation, the longer interval time between each measuring point influences the measured value of the water in the whole area, and causes data distortion.
In addition, when the existing profile soil moisture measuring system is used, due to the diversity of components in soil, the solid gravel is very easy to damage a measuring probe in the downlink process, and the soil moisture measuring instrument is very expensive, so that the use cost is high.
See the following chinese patent documents:
1. the invention discloses improved devices for measuring soil moisture, which is an application number of 200620168653.1, and patentees of Shenyang applied ecology research institute of Chinese academy of sciences, and comprises a hole puncher and a soil moisture meter.
2. The invention discloses pre-perforating devices capable of being used for a profile soil moisture measuring system, and relates to the application number of 201610248040.7, the patent applicant, China institute of Water conservancy and hydropower science, which solves the problem of positioning relation between the perforating devices and limiting pipes, but cannot ensure that subsequently placed measuring probes accurately enter preset holes, and can also damage the detecting system if gravel exists in the downward moving direction.
Disclosure of Invention
The invention designs deep soil multi-point synchronous punching measurement methods, which solve the technical problems that:
(1) however, in view of the inconvenience of field operation conditions and the limitation of the number of workers, and the influence of field temperature difference and water evaporation, the measured value of the water in the whole area is influenced by the longer interval time between each measuring point, so that the data are distorted.
(2) When the existing profile soil moisture measuring system is used for measuring the moisture of deeper soil, a matched pre-punching device cannot ensure that a probe times of the profile soil moisture measuring system is accurately inserted into a pre-punching hole, so that the probe of the profile soil moisture measuring system can be damaged.
(3) When the existing profile soil moisture measuring system is used, due to the diversity of components in soil, a measuring probe is easily damaged in the descending process due to solid gravel, and the soil moisture measuring instrument is expensive, so that the use cost is high.
In order to solve the technical problems, the invention adopts the following scheme:
deep soil multi-point synchronous punching measurement method, comprising the following steps:
step 9, controlling the receiver (8) to start the punching probe switch mechanism (4) of each automatic punching measuring device (9) and closing the cone digging part (11) of each automatic punching measuring device;
and 10, taking the automatic punching measuring device (9) out of the limiting pipe (6).
, in the step 1, the limiting slide block (61) of the limiting pipe (6) is matched with the limiting groove (31) of the mounting platform (3) of the automatic punching measuring device (9), so that the punching probe 1 is accurately positioned at the bottom of the hole.
Step , if the depth of pre-perforation cannot be completed by times, steps 2-3 can be repeated.
And , repeating the step 2-3 by a part of automatic punching measuring devices (9) or repeating the step 2-3 by a part of automatic punching measuring devices (9) for different times so as to realize the measurement of the pre-punched moisture at different depths.
deep soil moisture multiple spot synchronous measurement system, including a plurality of spacing pipes (6), a plurality of hole, a plurality of automatic measuring device (9) and control receiver (8) punch, place spacing pipes (6) in every hole, be equipped with automatic measuring device (9) that punch in every spacing pipe (6), control receiver (8) synchronous control every automatic measuring device (9) that punch and punch simultaneously, simultaneous measurement and measured data's transmission.
, the automatic punching measuring device (9) comprises a punching probe (1) driven by a punching driving motor (14) to punch pre-punched holes at different depths, a measuring probe (2) used for collecting water data of soil and arranged inside the punching probe (1), a punching probe switch mechanism (4) used for opening or closing a cone digging part of the punching probe (1) to enable the measuring probe (2) to freely enter and exit the punching probe (1), a micro cylinder (7) connected with the measuring probe (2) and used for sending the measuring probe (2) out of the punching probe (1) and measuring and withdrawing the measuring probe (1) after the measurement is finished, a pressure sensor (21) arranged at a measuring end part of the measuring probe (2) and used for judging whether the measuring probe (2) reaches a proper measuring position or not, and a control receiver (8) of a water measuring instrument connected with the punching driving motor (14), the punching probe switch mechanism (4), a micro cylinder (7), the pressure sensor (21) and the opening and stopping time of the measuring probe (2).
, the punching probe (1) comprises a cone digging part (11), a movable connecting part (12) and a fixed connecting part (13), the output end of a punching driving motor (14) is connected with the end of the fixed connecting part (13), the other end of the fixed connecting part (13) is connected with the end of the movable connecting part (12) through threads, the movable connecting part (12) stretches under the rotation of the fixed connecting part (13), the other end of the movable connecting part (12) is connected with the cone digging part (11) through a connecting rotating shaft (15), a punching probe switch mechanism (4) controls the cone digging part (11) to be opened or closed and synchronously realizes the release or the retraction of the measuring probe (2), and a spiral groove (16) convenient for soil output is arranged on the surface of the movable connecting part (12).
, the perforating probe switch mechanism (4) comprises an expansion link (41), an air cylinder rod (42), an elastic hollow tube (43) and a second micro air cylinder (45), the second micro air cylinder (45) is fixed on the inner wall of the mobile connection part (12), the air cylinder rod (42) of the second micro air cylinder (45) is fixedly connected with the end of the expansion link (41), the expansion link (41) expands and contracts under the action of the linear motion of the air cylinder rod (42), the elastic hollow tube (43) is fixed on the inner wall of the cone digging part (11), and the other end of the expansion link (41) enters the elastic hollow tube (43) to directly push the cone digging part (11) or indirectly push the cone digging part (11) through the elastic hollow tube (43).
, the cone digging part (11) is composed of at least two half cones (111), each half cone (111) is provided with elastic hollow tubes (43), each half cone (111) is connected with the movable connecting part (12) through connecting rotating shafts (15), and the end of the movable connecting part (12) connected with the connecting rotating shafts (15) is provided with a limiting sheet (17) used for limiting the opening angle of the half cone (111).
, the two half cones (111) are opened through second micro cylinders (45), the specific structure is that a telescopic rod (41) is connected with ejector rods through a connecting circular ring (44), a measuring probe (2) penetrates through the connecting circular ring (44), the telescopic rod (41) is matched with elastic hollow tubes (43) on half cones (111), and the ejector rods are matched with another elastic hollow tube (43) on another half cones (111).
, a return spring (46) is arranged between each half cone (111) and the movable connecting part (12) to help the half cones (111) to restore to cone structures after being opened.
, the punching machine further comprises an installation platform (3), the punching drive motor (14) is fixed on the installation platform (3), the end of the measuring probe (2) is also installed on the installation platform (3), and the extension rod (5) is connected above the installation platform (3).
, the automatic punching device further comprises a limiting pipe (6), the whole pipe body of the limiting pipe is buried in soil, the punching position of the automatic punching measuring device (9) can be located, a plurality of limiting sliding blocks (61) are arranged on the inner wall of the limiting pipe (6) along the axial direction, the same number of limiting grooves (31) are correspondingly arranged on the mounting platform (3), and the limiting sliding blocks (61) and the limiting grooves (31) are matched with each other to ensure that the position relation of the limiting sliding blocks (61) and the limiting grooves (31) cannot deviate.
, the punching probes (1) are two, the corresponding measuring probes (2) are also two, the two punching probes (1) work simultaneously, and the two measuring probes (2) work simultaneously.
The deep soil multi-point synchronous punching measuring method has the following beneficial effects:
(1) the invention can realize synchronous punching, measurement and measurement data transmission of a plurality of automatic punching measurement devices in different holes, can obtain the measurement value of soil moisture of a plurality of measurement points in a specific area within the same time, and can reflect the moisture condition of the soil in the area more truly and reliably.
(2) According to the invention, the punching probe and the measuring probe are combined at , and the measuring probe is released for measurement after the punching of the punching probe is finished, so that the step that the measuring probe needs to enter pre-punching independently is reduced, the damage of the measuring probe caused by the entering error of the measuring probe is avoided, and the damage of gravel in pre-punching to the measuring probe can also be avoided.
(3) The invention can realize the automation of punching and measurement, changes the mode of manual excessive contact in the past, and improves the measurement precision and the measurement efficiency.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of an automatic punching measuring device;
FIG. 2: FIG. 1 is a schematic diagram of the operation of the punch probe switch mechanism;
FIG. 3: FIG. 1 is a schematic external view of a perforation probe;
FIG. 4: the mounting platform and the limiting pipe are connected schematically;
FIG. 5: FIG. 1 is a schematic view of the structure of the digging portion of the cone;
FIG. 6: the control unit is connected with a block schematic diagram;
FIG. 7: the invention discloses a structural schematic diagram of a deep soil moisture multipoint synchronous measurement system.
Description of reference numerals:
the automatic punching device comprises a punching probe 1, a punching probe 11, a cone digging part 11, a semi-cone 111, a movable connecting part 12, a fixed connecting part 13, a punching driving motor 14, a connecting rotating shaft 15, a spiral groove 16, a limiting sheet 17, a measuring probe 2, a pressure sensor 21, an installation platform 3, a limiting groove 31, a punching probe switch mechanism 4, a telescopic rod 41, a cylinder rod 42, an elastic hollow tube 43, a connecting ring 44, a second micro cylinder 45, a return spring 46, an extension rod 5, a limiting tube 6, a limiting slide block 61, a th micro cylinder 7, a control receiver 8 and an automatic punching measuring device 9.
Detailed Description
The present invention is further illustrated at in conjunction with FIGS. 1-7:
as shown in figure 1, deep soil moisture multipoint synchronous measurement systems comprise a punching probe 1 and a measuring probe 2, wherein the punching probe 1 is of a hollow structure, the measuring probe 2 is placed in the punching probe 1, the number of the punching probes 1 is two, the number of the corresponding measuring probes 2 is two, the two punching probes 1 work simultaneously, the two measuring probes 2 work simultaneously, and after the punching probe 1 finishes punching, the measuring probe 2 is automatically released to measure soil moisture, so that the measuring probe 2 is prevented from being damaged by gravel when independently entering pre-punching holes or entering pre-punching holes.
Specifically, the punching probe 1 comprises a cone digging part 11, a movable connecting part 12 and a fixed connecting part 13, wherein the output end of a punching driving motor 14 is connected with the end 13 of the fixed connecting part 13, the other end end of the fixed connecting part 13 is connected with the end 12 of the movable connecting part 12 through threads, the movable connecting part 12 stretches under the rotation of the fixed connecting part 13, the other end end of the movable connecting part 12 is connected with the cone digging part 11 through a connecting rotating shaft 15, a punching probe switch mechanism 4 controls the opening or closing of the cone digging part 11 and synchronously releases or retracts the measuring probe 2, and a spiral groove 16 facilitating soil output is arranged on the surface of the movable connecting part 12.
The fixed connection part 13 is not fixed, but is fixedly connected with the output end of the punch driving motor 14, the fixed connection part 13 rotates under the action of the punch driving motor 14, the movable connection part 12 rotates through the thread action, and the length of the thread connection between the movable connection part 12 and the fixed connection part 13 is changed in the rotating process of the movable connection part 12, so that the movable connection part 12 and the fixed connection part 13 are telescopic, rod structures with threads distributed on the outer surface and tubular structures with threads distributed on the inner parts are required, and the lengths of the threads of the movable connection part 12 and the fixed connection part can be regulated according to the moving length of the movable connection part 12.
When forward rotation strokes are finished, the control receiver 8 starts the punching driving motor 14 to rotate reversely through instructions, drives the fixed connecting part 13 to rotate and retract the movable connecting part 12, and retracts the cone digging part 11.
As shown in FIG. 2, the punch probe switch mechanism 4 includes an expansion link 41, a cylinder rod 42, an elastic hollow tube 43 and a second micro cylinder 45, the second micro cylinder 45 is fixed on the inner wall of the movable connecting portion 12, the cylinder rod 42 of the second micro cylinder 45 is fixedly connected with the expansion link 41 , the expansion link 41 expands and contracts under the action of the linear motion of the cylinder rod 42, the elastic hollow tube 43 is fixed on the inner wall of the cone digging portion 11, and the other end of the expansion link 41 enters the elastic hollow tube 43 to directly push the cone digging portion 11 or indirectly push the cone digging portion 11 through the elastic hollow tube 43.
The cylinder rod 42 of the second micro cylinder 45 drives the telescopic rod 41 to extend and retract and enter the elastic hollow tube 43. The advantage of selecting the elastic hollow tube 43 is: the contact position of the telescopic rod 41 and the semi-cone 111 is prevented from changing when the telescopic rod 41 jacks the semi-cone 111; the smooth opening of the pyramidal excavation portion 11 can be ensured, avoiding the seizure or wear thereof.
The cone digging part 11 is at least composed of two half cones 111, each half cone 111 is provided with elastic hollow pipes 43, each half cone 111 is connected with the movable connecting part 12 through connecting rotating shafts 15, and the end of the movable connecting part 12 connected with the connecting rotating shafts 15 is provided with a limiting piece 17 used for limiting the opening angle of the half cone 111.
The two half cones 111 are opened by second micro cylinders 45 for releasing and measuring, and the structure is that the telescopic rod 41 is connected with a ejector rod through a connecting ring 44, the measuring probe 2 penetrates through the connecting ring 44, the telescopic rod 41 is matched with the elastic hollow tubes 43 on the half cones 111, and the ejector rod is matched with another elastic hollow tubes 43 on another half cones 111, the telescopic rod 41 and the ejector rod are driven by second micro cylinders 45, so that the space can be saved, the manufacturing cost can be saved, the synchronous working of the telescopic rod 41 and the ejector rod can be ensured all the time, and the two half cones 111 are opened synchronously.
When the cone digging part 11 needs to be closed, the punching driving motor 14 rotates reversely, and each half cone 111 needs to be restored, so that return springs 46 are arranged between each half cone 111 and the movable connecting part 12, which can help the half cones 111 to restore to the cone structure after being opened.
As shown in fig. 3, the surface of the moving connecting portion 12 is provided with a spiral groove 16 for facilitating the output of soil.
As shown in FIG. 4, the deep soil multi-point synchronous punching measurement method further comprises an installation platform 3, a punching driving motor 14 is fixed on the installation platform 3, the end of a measurement probe 2 is also installed on the installation platform 3, extension rods 5 are connected above the installation platform 3, in addition, the deep soil multi-point synchronous punching measurement method further comprises limiting pipes 6, the whole pipe bodies of the limiting pipes are buried in the soil, a plurality of limiting sliding blocks 61 are axially arranged on the inner walls of the limiting pipes 6, the installation platform 3 is correspondingly provided with limiting grooves 31 with the same number, and the limiting sliding blocks 61 and the limiting grooves 31 are matched with each other to ensure that the position relation of the limiting sliding blocks 61 and the limiting.
As shown in fig. 5, the digging portion 11 of the cone is composed of two half cones 111, and the half cones 111 are two structures which are cut into two equal volumes along the height of the cone.
As shown in fig. 6, the connection mode of the control units of the deep soil multi-point synchronous perforation measuring method of the present invention is as follows:
the control receiver 8 of the moisture meter, which is connected to the punch driving motor 14, the second micro cylinder 45 of the punch probe switching mechanism 4, the th micro cylinder 7, the pressure sensor 21, and the measuring probe 2, controls the opening, the opening time, and the stopping thereof, and in addition, the control receiver 8 of the moisture meter controls the punch driving motor 14, the second micro cylinder 45 of the punch probe switching mechanism 4, the th micro cylinder 7, the pressure sensor 21, and the measuring probe 2 through a power source.
As shown in fig. 7, deep soil multi-point synchronous perforation measuring methods include six limiting pipes 6, six holes A, B, C, D, E, F, six automatic perforation measuring devices 9, and control receivers 8, wherein each hole is placed with limiting pipes 6, each limiting pipe 6 is provided with automatic perforation measuring devices 9, and the control receivers 8 synchronously control each automatic perforation measuring device 9 to perform simultaneous perforation, simultaneous measurement, and transmission of measurement data.
The multi-point synchronous drilling measurement method for the deep soil comprises the following steps:
And 2, controlling the receiver 8 to start the punching driving motors 14 of all the punching probes 1 to rotate forwards, and downwards digging the pre-punched holes by each cone digging part 11 through force transmission.
And 3, controlling the receiver 8 to start the punching driving motors 14 of all the punching probes 1 to reversely rotate, so that each punching probe 1 is restored to the initial state before the step 2 is started.
And 4, controlling the receiver 8 to start each perforating probe switch mechanism 4, and opening each cone digging part 11 of each telescopic rod 41 through force transmission so that a descending channel of each measuring probe 2 is unobstructed.
And 5, controlling the receiver 8 to start each th microcylinder 7, and pushing each th microcylinder 7 out of the punching probe 1 by the corresponding measuring probe 2.
And 6, in the descending process of each measuring probe 2, when the numerical value output by any pressure sensors 21 reaches a preset value, the measuring probe 2 is indicated to be fully contacted with the soil to be measured, and the receiver 8 is controlled to close the th micro air cylinder 7 corresponding to the pressure sensor 21 until all th micro air cylinders 7 are closed.
And 7, controlling the receiver 8 to start each measuring probe 2 to collect moisture data, and storing the moisture data in the control receiver 8.
And 8, after data acquisition is finished, controlling the receiver 8 to start each th micro cylinder 7, and withdrawing each measuring probe 2 to the corresponding perforating probe 1.
And 9, controlling the receiver 8 to start the punching probe switch mechanism 4 of each automatic punching measuring device 9, and closing each cone digging part 11.
And 10, taking the automatic punching measuring device 9 out of the limiting pipe 6.
, in step 1, the limit slide block 61 of the limit tube 6 is matched with the limit groove 31 of the mounting platform 3 of the automatic punching measuring device 9, so that the punching probe 1 is accurately positioned at the bottom of the hole.
If the depth of the pre-perforation cannot be completed times, step 2-3 may be repeated.
And (3) repeating the step (2-3) by the partial automatic punching measuring device (9), and realizing the measurement of the pre-punched moisture at different depths by different times of repeating the step (2-3) by the partial automatic punching measuring device (9).
The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (2)
1, deep soil moisture perforating measurement method, comprising the following steps:
step 1, digging a plurality of holes in a specific area, placing limiting pipes (6) in each hole, arranging automatic punching measuring devices (9) in each limiting pipe (6), enabling the automatic punching measuring devices (9) to be located at the bottoms of the holes, and controlling a receiver (8) to be connected with all the automatic punching measuring devices (9), wherein in the step 1, a limiting sliding block (61) of each limiting pipe (6) is matched with a limiting groove (31) of a mounting platform (3) of each automatic punching measuring device (9), so that a punching probe (1) is accurately located at the bottom of each hole;
step 2, controlling the receiver (8) to start the punching driving motors (14) of all the punching probes (1) to rotate forwards, and downwards digging the pre-punched holes by each cone digging part (11) through force transmission;
step 3, controlling the receiver (8) to start the punching driving motors (14) of all the punching probes (1) to rotate reversely, so that each punching probe (1) is recovered to the initial state before the step 2 starts, and if the depth of the pre-punching can not be finished for times, repeating the step 2-3;
step 4, controlling the receiver (8) to start each perforating probe switch mechanism (4), and opening each cone digging part (11) by each telescopic rod (41) through force transmission to ensure that a descending channel of each measuring probe (2) is smooth;
step 5, controlling a receiver (8) to start each th micro cylinder (7), and pushing each th micro cylinder (7) out of the punching probe (1) by the measuring probe (2);
step 6, in the descending process of each measuring probe (2), when the numerical value output by any pressure sensor (21) reaches a preset value, the measuring probe (2) is fully contacted with the soil to be measured, and the receiver (8) is controlled to close the micro cylinder (7) corresponding to the pressure sensor (21) until all micro cylinders (7) are closed;
step 7, controlling the receiver (8) to start each measuring probe (2) to collect water data, and storing the water data in the control receiver (8);
step 8, after data acquisition is finished, controlling the receiver (8) to start each th micro cylinder (7) and withdrawing each measuring probe (2) to the corresponding punching probe (1);
step 9, controlling the receiver (8) to start the punching probe switch mechanism (4) of each automatic punching measuring device (9) and closing the cone digging part (11) of each automatic punching measuring device;
and 10, taking the automatic punching measuring device (9) out of the limiting pipe (6).
2. The deep soil moisture perforating method as recited in claim 1, wherein: and (3) repeating the step (2-3) by part of the automatic punching measuring devices (9), or repeating the step (2-3) by part of the automatic punching measuring devices (9) for different times so as to realize the measurement of the pre-punched moisture at different depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713676.3A CN109001433B (en) | 2017-05-02 | 2017-05-02 | deep soil moisture punching measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713676.3A CN109001433B (en) | 2017-05-02 | 2017-05-02 | deep soil moisture punching measurement method |
| CN201710298149.6A CN107132335B (en) | 2017-05-02 | 2017-05-02 | A kind of deep soil Multipoint synchronous punches measuring method |
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| CN201710298149.6A Division CN107132335B (en) | 2017-05-02 | 2017-05-02 | A kind of deep soil Multipoint synchronous punches measuring method |
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| CN109001433A CN109001433A (en) | 2018-12-14 |
| CN109001433B true CN109001433B (en) | 2020-01-31 |
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| CN201810713676.3A Active CN109001433B (en) | 2017-05-02 | 2017-05-02 | deep soil moisture punching measurement method |
| CN201810707080.2A Active CN109001431B (en) | 2017-05-02 | 2017-05-02 | Automatic soil moisture punching and measuring device |
| CN201810713677.8A Active CN109001434B (en) | 2017-05-02 | 2017-05-02 | Deep soil multi-point synchronous punching measurement system |
| CN201710298149.6A Active CN107132335B (en) | 2017-05-02 | 2017-05-02 | A kind of deep soil Multipoint synchronous punches measuring method |
| CN201810713307.4A Active CN109001432B (en) | 2017-05-02 | 2017-05-02 | Soil moisture probe on-off mechanism that punches |
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| CN201810707080.2A Active CN109001431B (en) | 2017-05-02 | 2017-05-02 | Automatic soil moisture punching and measuring device |
| CN201810713677.8A Active CN109001434B (en) | 2017-05-02 | 2017-05-02 | Deep soil multi-point synchronous punching measurement system |
| CN201710298149.6A Active CN107132335B (en) | 2017-05-02 | 2017-05-02 | A kind of deep soil Multipoint synchronous punches measuring method |
| CN201810713307.4A Active CN109001432B (en) | 2017-05-02 | 2017-05-02 | Soil moisture probe on-off mechanism that punches |
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| CN107514143B (en) * | 2017-09-21 | 2023-05-12 | 中国三冶集团有限公司 | Board thickness controller |
| CN109765076A (en) * | 2019-01-25 | 2019-05-17 | 宁波甬骋智能科技有限公司 | One kind is by vertically squeezing acquisition interflow device |
| CN112684145B (en) * | 2020-12-15 | 2024-01-26 | 湖南博川农业发展有限责任公司 | Saline-alkali soil detection device |
| CN114460262A (en) * | 2020-12-28 | 2022-05-10 | 海南聚能科技创新研究院有限公司 | Portable soil moisture salinity sensor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109001431A (en) | 2018-12-14 |
| CN109001434A (en) | 2018-12-14 |
| CN109001431B (en) | 2020-08-25 |
| CN109001434B (en) | 2020-05-12 |
| CN107132335A (en) | 2017-09-05 |
| CN109001433A (en) | 2018-12-14 |
| CN107132335B (en) | 2018-06-08 |
| CN109001432A (en) | 2018-12-14 |
| CN109001432B (en) | 2020-10-02 |
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