CN211453409U - Intubation type soil moisture detector verification system - Google Patents

Intubation type soil moisture detector verification system Download PDF

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Publication number
CN211453409U
CN211453409U CN202020034323.3U CN202020034323U CN211453409U CN 211453409 U CN211453409 U CN 211453409U CN 202020034323 U CN202020034323 U CN 202020034323U CN 211453409 U CN211453409 U CN 211453409U
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frequency
air
calibration
water
underwater
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杜建苹
刘银锋
彭坚
韦伟
翟龙升
刘丹丹
宋佳新
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Beijing Huayun Dongfang Detection Technology Co ltd
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Beijing Huayun Dongfang Detection Technology Co ltd
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Abstract

The utility model relates to an intubation type soil moisture detector verification system. The verification system comprises a soil medium frequency verification device, an air medium frequency verification unit, an underwater frequency verification unit and a data acquisition unit; the air medium frequency detecting unit comprises an air medium frequency detecting cylinder, an air medium frequency detecting insertion pipe is arranged in the air medium frequency detecting cylinder, and an air medium frequency detecting cavity is formed between the air medium frequency detecting insertion pipe and the cylinder wall of the air medium frequency detecting cylinder; the underwater frequency calibration unit comprises an underwater frequency calibration barrel, an underwater frequency calibration insertion tube is arranged in the underwater frequency calibration barrel, and an underwater frequency calibration cavity for containing water is formed between the underwater frequency calibration insertion tube and the barrel wall of the underwater frequency calibration barrel; when the data acquisition unit is used, the data acquisition unit is connected with the detectors calibrated in the soil medium frequency calibration device, the air medium frequency calibration unit and the water medium frequency calibration unit through data lines. The verification system is used for obtaining a detector verification result with higher accuracy.

Description

Intubation type soil moisture detector verification system
Technical Field
The utility model relates to an intubation type soil moisture detector verification system.
Background
The intubation type soil moisture detector is an important apparatus for realizing variable irrigation, water saving and drought resistance; the FDR frequency domain reflection method is a commonly used method for an intubating soil moisture detector, and the principle of the FDR frequency domain reflection method is to calculate the water content of a measured object according to the difference of radio frequencies of electromagnetic waves emitted by the detector in substances with different dielectric constants. The intubation type soil moisture detector comprises a detector body, a plurality of sensor nodes are sequentially arranged on the detector body from top to bottom, and each sensor node is provided with a frequency acquisition unit and is used for acquiring moisture information in soil.
For the accuracy of the data that the guarantee detector surveyed and obtained, generally can carry out periodic verification to the detector, the utility model discloses a patent document that the publication number is CN207866814U describes a intubation type soil moisture detector calibrating installation in authorizing, this calibrating installation includes the mounting bracket and installs the verification unit in the mounting bracket, verification unit is including the mounting structure and the soil box subassembly that are used for installing the detector, four detectors can be fixed simultaneously to mounting structure, be in on same circumference after four detectors are fixed, mounting structure can drive four detectors and rotate around the centre of a circle of this circumference, the soil box subassembly includes soil box tray and locates four soil boxes on the soil box tray, four soil boxes can rotation in the mounting bracket, soil box tray can the up-and-down motion. During the use, during each detector inserted the soil box, the soil box rotation can be so that the water content of the soil of different position in the detector detection soil box, and mounting structure drives four detectors and rotates, can make each detector insert the interior examination of different soil boxes to guarantee the accurate nature of examination of detector.
When the detector is used, the initial value of the frequency in the air and the initial value of the frequency in the water are used as references for detection, and the water content in the soil is judged according to different detected frequencies.
After the detector is used for a certain time, the situation that the value read by the frequency in the detection air is different from the initial value of the frequency in the air and the situation that the value read by the frequency in the detection water is different from the initial value of the frequency in the water are likely to occur, in this situation, the detection device is continuously used for detecting the detector, and the obtained data is inaccurate.
Disclosure of Invention
An object of the utility model is to provide an intubation type soil moisture detector verification system for obtain the higher detector verification result of accuracy.
The utility model provides an intubation type soil moisture detector verification system adopts following technical scheme:
this intubation type soil moisture detector verification system includes:
a frequency in soil calibrating device;
the device comprises an air medium frequency detecting unit, a frequency detecting unit and a frequency detecting unit, wherein the air medium frequency detecting unit comprises an air medium frequency detecting cylinder, the middle part of the air medium frequency detecting cylinder is provided with an air medium frequency detecting insertion pipe for inserting a detector, and an air medium frequency detecting cavity for containing air is formed between the air medium frequency detecting insertion pipe and the cylinder wall of the air medium frequency detecting cylinder;
the underwater frequency calibration unit comprises an underwater frequency calibration barrel, wherein an underwater frequency calibration insertion pipe for inserting a detector is arranged in the middle of the underwater frequency calibration barrel, and an underwater frequency calibration cavity for containing water is formed between the underwater frequency calibration insertion pipe and the barrel wall of the underwater frequency calibration barrel;
and the data acquisition unit is connected with the detectors calibrated in the soil medium frequency calibration device, the air medium frequency calibration unit and the water medium frequency calibration unit through data lines during use and is used for collecting information acquired by each detector.
The utility model provides an intubation type soil moisture detector verification system's beneficial effect is: the calibration system is provided with a soil medium frequency calibration device, an air medium frequency calibration unit and an underwater frequency calibration unit, the air medium frequency calibration unit and the underwater frequency calibration unit can be used for detecting the error between the air medium frequency initial value and the underwater frequency initial value of the detector and the actual situation, if the error is within an allowable range, the detector can be continuously calibrated through the soil medium frequency calibration device, if the error exceeds the allowable range, the parameters of the detector are changed, the actually measured air medium frequency value is used for replacing the air medium frequency initial value, the actually measured underwater frequency value is used for replacing the underwater frequency initial value, and then the soil medium frequency calibration device is used for calibrating the detector, so that the obtained calibration structure is more accurate; in addition, the frequency calibration tube in the air and the frequency calibration tube in the water are respectively provided with the frequency calibration tube in the air and the frequency calibration tube in the water, and the inner diameters of the frequency calibration tube in the air and the frequency calibration tube in the water are reasonably arranged, so that the detection accuracy of the detector can be improved, and whether the detector is deformed or not can be checked.
Furthermore, the intubation type soil moisture detector verification system further comprises a rack, the rack is a movable rack with rollers mounted at the bottom, and the frequency detection cylinder in the air and the frequency detection cylinder in the water are mounted on the rack side by side. The arrangement is convenient for the movement of the frequency detection cylinder in the air and the frequency detection cylinder in the water.
Furthermore, the rack is provided with a fixing structure for fixing the frequency detection cylinder in the air and the frequency detection cylinder in the water. The frequency detection cylinder in the air and the frequency detection cylinder in the water are arranged on the rack stably.
Further, the rack is box-shaped structure, including roof and bottom plate, set up two perforation that are arranged in supplying air respectively that frequency examines a section of thick bamboo and aquatic frequency examination section of thick bamboo and pass on the roof, it examines a section of thick bamboo and aquatic frequency examination section of thick bamboo respectively to correspond in the air frequency on the bottom plate and respectively is equipped with a plurality of stoppers, each stopper is respectively examined a section of thick bamboo and aquatic frequency along the frequency in the air and is examined a section of thick bamboo and aquatic frequency and examine the circumference interval arrangement of a section of thick bamboo and carry on spacingly with examining a section of thick bamboo to frequency in the air, perforation on the roof and the stopper on the bottom plate constitute the fixed knot who is arranged in fixed air frequency examination section of thick bamboo. The fixing structure with the structure is simple, convenient to process and low in manufacturing cost.
Furthermore, the intubation type soil moisture detector verification system also comprises a wire frame for routing data wires between the detectors and the data acquisition unit verified in the air medium-frequency verification unit and the water medium-frequency verification unit. The arrangement is convenient for the arrangement of the data lines, and accidents such as clamping and breaking of the data lines and tripping of workers caused by the scattered stacking of the data lines are prevented.
Furthermore, the wire frame is arranged beside the air frequency detection cylinder and the water frequency detection cylinder and is arranged corresponding to the middle of the air frequency detection cylinder and the water frequency detection cylinder. The arrangement is convenient for the wiring of the data line.
Further, the wire frame is in an inverted L shape. The arrangement is convenient for the wiring of the data line.
Furthermore, the material of the air frequency detection cylinder and the water frequency detection cylinder is acrylic. The acrylic material is convenient to obtain and low in cost.
Furthermore, the frequency verification cannula in the air and the frequency verification cannula in the water are both PVC pipes. The PVC pipe is convenient to obtain materials and low in cost.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a calibration system for a cannula-type soil moisture detector provided by the present invention;
fig. 2 is a schematic structural diagram of a soil medium frequency calibrating device in an embodiment of the intubation-type soil moisture detector calibrating system provided by the present invention;
fig. 3 is a schematic structural diagram of a rack, a wire rack, an air-to-air frequency calibration unit and an underwater frequency calibration unit in an embodiment of the intubation-type soil moisture detector calibration system provided by the present invention.
In the figure: 1-soil medium frequency calibrating device, 2-data collector, 3-air medium frequency calibrating unit, 4-water frequency calibrating unit, 5-bench, 6-data line, 7-wire rack, 8-detector, 11-mounting rack, 12-mounting structure, 13-soil box tray, 14-screw, 15-soil box, 16-guide rod, 31-air frequency calibrating cylinder, 32-air frequency calibrating insertion tube, 41-water frequency calibrating cylinder, 42-water frequency calibrating insertion tube, 51-roller, 52-adjusting foot seat, 53-framework, 54-top plate, 55-bottom plate, 56-side plate, 57-limiting block, 151-soil medium frequency calibrating insertion tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model provides a concrete embodiment of intubate formula soil moisture detector verification system:
as shown in fig. 1, the intubation type soil moisture detector calibration system comprises a soil medium frequency calibration device 1 and a data collector 2; as shown in fig. 2, the soil medium frequency calibrating device 1 comprises a mounting frame 11 and a soil calibrating unit installed in the mounting frame 11, wherein the soil calibrating unit comprises a mounting structure 12 installed on the top of the mounting frame 11 and used for fixing the detector 8, the mounting structure 12 is provided with four fixing positions for fixing the detector 8, the four detectors 8 are fixed on the mounting structure 12 and then are positioned on the circumference of a circle, the mounting structure 12 can rotate under the driving of a rotation driving mechanism (not shown in the figure), and the four detectors 8 move on the circumference of the circle during the rotation of the mounting structure 12; the soil verification unit further comprises a soil box assembly, the soil box assembly comprises a soil box tray 13 and four soil boxes 15 arranged on the soil box tray 13, soil medium frequency verification insertion pipes 151 used for inserting the detectors 8 are arranged in the four soil boxes 15, soil medium frequency verification cavities used for containing soil are formed between the soil medium frequency verification insertion pipes 151 and box walls of the soil boxes 15, and the positions of the four soil boxes 15 arranged on the soil box tray 13 ensure that the four detectors 8 are aligned with the soil medium frequency verification insertion pipes 151 on the four soil boxes 15 when the mounting structure 12 rotates to certain states; the soil medium frequency calibrating device 1 further comprises a lead screw 14 extending up and down and four guide rods 16 extending up and down, the soil box disc 13 is sleeved on the lead screw 14, a thread sleeve (not shown in the figure) matched with the lead screw 14 is arranged on the soil box disc 13, the four guide rods 16 penetrate through the soil box disc 13 and play a role in guiding the soil box disc 13, and the lead screw 14 is driven by a lead screw driving mechanism (not shown in the figure) to rotate so as to drive the soil box disc 13 to move in an up-and-down direction in a guiding manner; the soil box tray 13 is further provided with a rotation driving mechanism (not shown) capable of driving the soil box 15 to rotate.
The four detectors 8, which are fixed to the mounting structure 12, are connected to the data collector 2 via associated data lines in order to transmit the data collected by the detectors 8 to the data collector 2.
When the soil medium frequency calibrating device 1 is used, the soil box tray 13 moves upwards under the driving of the screw driving mechanism and the screw 14, so that the four detectors 8 are inserted into the soil medium frequency calibrating insertion tubes 151 of the soil box 15, at the moment, the sensor nodes on the detectors 8, which are the uppermost, are aligned with the soil box 15, then the detectors 8 start working to detect the water content of the soil in the soil box 15, then the soil box 15 rotates, the detectors 8 detect the water content of the soil at different positions in the soil box 15, after the detection of the sensor nodes on the detectors 8, the soil box tray 13 moves downwards, so that the second sensor nodes from top to bottom in the detectors 8 are aligned with the soil box 15, then the detection of the detectors 8 is started, and so on, after the detection of all the sensor nodes on the detectors 8 is completed, the soil box tray 13 moves downwards to separate the detectors 8 from the soil box 15, then the mounting structure 12 and the rotation driving mechanism drive the four detectors, the four detectors 8 are aligned with the adjacent soil box 15, and then the measurement is started for the adjacent soil box 15, and so on, until each detector 8 detects four soil boxes 15.
As shown in fig. 1 and 3, the intubation-type soil moisture detector verification system further includes an in-air frequency verification unit 3, an in-water frequency verification unit 4, and a gantry 5; the medium-air frequency detecting unit 3 comprises a medium-air frequency detecting cylinder 31 and a medium-air frequency detecting insertion tube 32 inserted into the middle of the medium-air frequency detecting cylinder 31 from top to bottom, the medium-air frequency detecting cylinder 31 comprises a cylinder body, an upper cover and a lower cover, the upper cover, the lower cover and the cylinder body enclose the medium-air frequency detecting cylinder 31, the upper cover is provided with a through hole for the medium-air frequency detecting insertion tube 32 to pass through, an medium-air frequency detecting cavity for containing air is formed between the outer peripheral surface of the medium-air frequency detecting insertion tube 32 and the inner cylinder wall of the medium-air frequency detecting cylinder 31, and the medium-air frequency detecting insertion tube 32 is used for inserting the detector 8 to detect the air in the medium-air frequency detecting cavity; the underwater frequency calibration unit 4 comprises an underwater frequency calibration barrel 41 and an underwater frequency calibration insertion tube 42 inserted in the middle of the underwater frequency calibration barrel 41 from top to bottom, the underwater frequency calibration barrel 41 comprises a barrel body, an upper cover and a lower cover, the upper cover, the lower cover and the barrel body surround the underwater frequency calibration barrel 41 together, the upper cover is provided with a through hole for the water-in frequency calibration insertion tube 42 to pass through, an underwater frequency calibration cavity for containing water is formed between the outer peripheral surface of the underwater frequency calibration insertion tube 42 and the inner barrel wall of the underwater frequency calibration barrel 41, and the underwater frequency calibration insertion tube 42 is used for inserting a detector 8 to detect the water in the underwater frequency calibration cavity; the bench 5 is a square box-shaped structure, comprises a framework 53, a top plate 54, a bottom plate 55 and side plates 56, two through holes arranged side by side are provided on the top plate 54, the in-air frequency detecting cylinder 31 and the in-water frequency detecting cylinder 41 can be inserted into the inside of the stand 5 through the corresponding through holes and placed on the bottom plate 55, four limit blocks 57 are respectively arranged on the bottom plate 55 corresponding to the frequency detection cylinder 31 in the air and the frequency detection cylinder 41 in the water, the four limit blocks 57 corresponding to the in-air frequency detection cylinder 31 are arranged along the circumference of the in-air frequency detection cylinder 31 at intervals, so as to limit the in-air frequency detection cylinder 31, four limit blocks 57 corresponding to the underwater frequency detection cylinder 41 are arranged at intervals along the circumference of the underwater frequency detection cylinder 41, the limiting blocks 57 and the through holes on the top plate 54 form a fixing structure for fixing the in-air frequency detection cylinder 31 and the in-water frequency detection cylinder 41; four corners of the bottom of the rack 5 are respectively provided with a roller 51 to realize the movement of the rack 5, four corners of the rack 5 are respectively provided with an adjusting foot seat 52, and each adjusting foot seat 52 can support the rack 5 after the rack 5 moves to a set position, so that the levelness of the rack 5 can be adjusted while the rack 5 is prevented from abnormally moving.
In this embodiment, the air middle frequency calibration insertion tube 32 and the water middle frequency calibration insertion tube 42 are both PVC tubes, the air middle frequency calibration tube 31 and the water middle frequency calibration tube 41 are both made of acrylic, and the framework 53, the top plate 54, the bottom plate 55 and the side plates 56 in the rack 5 are all made of aluminum alloy.
The inner diameters of the in-air frequency verification cannula 32 and the in-water frequency verification cannula 42 are slightly larger than the maximum outer diameter of the probe 8, and when the probe 8 is deformed and the degree of deformation exceeds the allowable range, the probe 8 cannot be inserted into the in-air frequency verification cannula 32 and the in-water frequency verification cannula 42.
As shown in fig. 1, the detectors 8 inserted into the air frequency verification cannula 32 and the water frequency verification cannula 42 are respectively connected with the data collector 2 through corresponding data lines 6, so as to transmit the data collected by the two detectors 8 to the data collector 2; the plug tube type soil moisture detector calibration system further comprises a wire frame 7, the wire frame 7 is in an inverted L shape, the wire frame 7 is installed on the rack 5, the wire frame 7 is located beside the air frequency detection cylinder 31 and the water frequency detection cylinder 41 and arranged corresponding to the middle positions of the air frequency detection cylinder 31 and the water frequency detection cylinder 41, and the data wires 6 are arranged along the wire frame 7, so that the data wires 6 can be prevented from being stacked randomly.
This intubation type soil moisture detector verification system includes that aquatic frequency examines a section of thick bamboo 41, air medium frequency and examines a section of thick bamboo 31 and soil box 15, and soil box 15 can use the standard soil box of different water contents, so make detector 8 can detect in the environment of various different water contents, and coverage is wider, and the measured data who obtains also more has reference value, and detector 8's testing result is also more accurate.
In the above embodiment, intubation type soil moisture detector verification system includes mobilizable rack, is equipped with the fixed knot who is arranged in the fixed air frequency to examine a section of thick bamboo and an aquatic frequency to examine a section of thick bamboo on the rack and constructs, and fixed knot constructs by seting up the perforation on the roof and locating the stopper on the bottom plate and constitute. In other embodiments, the rack is not needed, and the in-air frequency calibration cylinder and the in-water frequency calibration cylinder are directly placed on the relevant workbench or the ground and can be used as well; the fixing structure can be in other forms, such as that the frequency detecting cylinder in air and the frequency detecting cylinder in water are directly placed on the upper surface of the top plate of the rack, and the upper surface of the top plate is provided with a clamping structure corresponding to the two detecting cylinders respectively, so that the clamping of the two detecting cylinders can be realized, and the fixing structure can also be used; the rack is not provided with a fixed structure, and the frequency detection cylinder in the air and the frequency detection cylinder in the water are directly placed on the upper surface of the top plate of the rack and can be used as well.
In the above embodiment, the intubation type soil moisture detector calibration system further includes a wire rack disposed at a position corresponding to the middle of the in-air frequency calibration barrel and the in-water frequency calibration barrel, and the wire rack is located beside the two calibration barrels. In other embodiments, the wire frame can be arranged at any position of the rack and can be used; the intubation type soil moisture detector calibration system does not need to be provided with a wire frame and can be used as well.
In the above embodiment, the bobbin has an inverted L-shape. In other embodiments, the bobbin may have other shapes, such as a straight shape.
In the above embodiment, the air frequency detecting cylinder and the water frequency detecting cylinder are made of acrylic. In other embodiments, the material of the air-in frequency detection cylinder and the water-in frequency detection cylinder may be other types, such as stainless steel, aluminum alloy, etc.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides an intubation type soil moisture detector verification system which characterized by includes:
a frequency in soil calibrating device;
the device comprises an air medium frequency detecting unit, a frequency detecting unit and a frequency detecting unit, wherein the air medium frequency detecting unit comprises an air medium frequency detecting cylinder, the middle part of the air medium frequency detecting cylinder is provided with an air medium frequency detecting insertion pipe for inserting a detector, and an air medium frequency detecting cavity for containing air is formed between the air medium frequency detecting insertion pipe and the cylinder wall of the air medium frequency detecting cylinder;
the underwater frequency calibration unit comprises an underwater frequency calibration barrel, wherein an underwater frequency calibration insertion pipe for inserting a detector is arranged in the middle of the underwater frequency calibration barrel, and an underwater frequency calibration cavity for containing water is formed between the underwater frequency calibration insertion pipe and the barrel wall of the underwater frequency calibration barrel;
and the data acquisition unit is connected with the detectors calibrated in the soil medium frequency calibration device, the air medium frequency calibration unit and the water medium frequency calibration unit through data lines during use and is used for collecting information acquired by each detector.
2. The intubation-tube soil moisture detector calibration system according to claim 1, wherein the intubation-tube soil moisture detector calibration system further comprises a rack, the rack is a moving rack with rollers mounted at the bottom, and the in-air frequency calibration tube and the in-water frequency calibration tube are mounted on the rack side by side.
3. The intubation-tube soil moisture detector verification system according to claim 2, wherein the rack is provided with a fixing structure for fixing the in-air frequency detection tube and the in-water frequency detection tube.
4. The intubation-tube soil moisture detector assay system according to claim 3, wherein the rack has a box-like structure including a top plate and a bottom plate, the top plate has two through holes for passing the air-in frequency detection tube and the water-in frequency detection tube, the bottom plate has a plurality of stoppers corresponding to the air-in frequency detection tube and the water-in frequency detection tube, the stoppers are spaced apart from each other in the circumferential direction of the air-in frequency detection tube and the water-in frequency detection tube to limit the air-in frequency detection tube and the water-in frequency detection tube, and the through holes on the top plate and the stoppers on the bottom plate together form a fixing structure for fixing the air-in frequency detection tube and the water-in frequency detection tube.
5. The system of any of claims 1-4, further comprising a wire rack for routing data wires between the detectors and data collectors of the in-air and in-water frequency calibration units.
6. The intubation-tube soil moisture detector assay system of claim 5, wherein the wire rack is located beside and in correspondence with the middle of the air frequency detection tube and the water frequency detection tube.
7. The cannula type soil moisture detector verification system according to claim 5, wherein said wire rack is in an inverted L shape.
8. The intubation-tube soil moisture detector verification system according to any one of claims 1 to 4, wherein the material of the in-air frequency detection tube and the in-water frequency detection tube is acrylic.
9. The cannula soil moisture detector verification system of any one of claims 1-4, wherein the frequency in air verification cannula and the frequency in water verification cannula are both PVC tubes.
CN202020034323.3U 2020-01-08 2020-01-08 Intubation type soil moisture detector verification system Active CN211453409U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020034323.3U CN211453409U (en) 2020-01-08 2020-01-08 Intubation type soil moisture detector verification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020034323.3U CN211453409U (en) 2020-01-08 2020-01-08 Intubation type soil moisture detector verification system

Publications (1)

Publication Number Publication Date
CN211453409U true CN211453409U (en) 2020-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020034323.3U Active CN211453409U (en) 2020-01-08 2020-01-08 Intubation type soil moisture detector verification system

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CN (1) CN211453409U (en)

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