CN212301415U - Moisture sensor - Google Patents
Moisture sensor Download PDFInfo
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- CN212301415U CN212301415U CN202022182553.7U CN202022182553U CN212301415U CN 212301415 U CN212301415 U CN 212301415U CN 202022182553 U CN202022182553 U CN 202022182553U CN 212301415 U CN212301415 U CN 212301415U
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- eddy current
- moisture sensor
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- shell
- inner casing
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Abstract
An embodiment of the utility model discloses a moisture sensor, this moisture sensor includes: the eddy current testing device comprises a shell, a testing sheet arranged in the shell and an eddy current testing probe positioned at one end of the shell; the casing comprises an outer casing, an inner casing and a hydrophobic stone, the outer casing is sleeved on the outer side of the inner casing, a detection cavity is formed in the inner casing, the detection piece is arranged in the detection cavity, the hydrophobic stone is filled between the outer casing and the inner casing, and a plurality of flow guide holes are formed in the outer casing and the inner casing. The moisture sensor is convenient to use, wide in application range and high in measurement precision.
Description
Technical Field
The utility model relates to a sensor field, concretely relates to moisture sensor.
Background
At present, the soil moisture sensor mainly utilizes two measurement principles of TDR and FDR, and the two soil moisture sensors all need the test probe to be directly contacted with soil in the use process, and the type and the density of soil have great influence on the data accuracy measured by the sensor, and the sensor adopts batched calibration when leaving the factory, if needing to obtain higher accuracy, the soil of actual measurement needs to be taken back to the laboratory to be calibrated again by a drying method, and the measuring personnel convert the water content of the soil into according to the calibrated formula. The use is inconvenient, and the application range is single.
Therefore, it is necessary to develop a moisture sensor with convenient use, wide application range and high measurement accuracy.
The information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a moisture sensor, this moisture sensor convenient to use, application scope are wide and measurement accuracy is high.
In order to achieve the above object, according to the present invention, there is provided a moisture sensor, comprising: the eddy current testing device comprises a shell, a testing sheet arranged in the shell and an eddy current testing probe positioned at one end of the shell;
the casing comprises an outer casing, an inner casing and a hydrophobic stone, the outer casing is sleeved on the outer side of the inner casing, a detection cavity is formed in the inner casing, the detection piece is arranged in the detection cavity, the hydrophobic stone is filled between the outer casing and the inner casing, and a plurality of flow guide holes are formed in the outer casing and the inner casing.
Preferably, the detection sheet is a metal sheet.
Preferably, one end of the eddy current testing probe penetrates through the shell and is arranged in the testing cavity, and the arrangement direction of the eddy current testing probe is perpendicular to the metal sheet.
Preferably, the area ratio of the metal sheet to the cross section of the eddy current inspection probe is greater than or equal to 3.
Preferably, the eddy current testing device further comprises an output lead, wherein the output lead is connected to one end of the eddy current testing probe, which does not extend into the testing cavity.
Preferably, the outer shell and the inner shell are rectangular parallelepiped shaped.
Has the advantages that: the moisture sensor of this application utilizes the eddy current measurement principle through the setting of electric eddy current test probe and detection piece, can adopt non-contact measurement to measure soil moisture content, because with soil non-contact, soil type and density do not have the influence to measurement accuracy, and survey crew can directly use the moisture content that is used for obtaining soil, and the moisture sensor application scope of this application is wide, has both improved the measurement accuracy of sensor, has reduced survey crew's work load again.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the moisture sensor of the present invention.
Description of reference numerals:
1, a shell; 2, hydrophobic stone; 3, detecting a probe by an eddy current; 4 a metal sheet; 5, water; 6 output lead.
Detailed Description
The technical scheme of the utility model is described in detail with the accompanying drawings.
According to an aspect of the utility model provides a moisture sensor, this moisture sensor includes: the eddy current testing device comprises a shell, a testing sheet arranged in the shell and an eddy current testing probe positioned at one end of the shell;
the casing comprises an outer casing, an inner casing and a hydrophobic stone, the outer casing is sleeved on the outer side of the inner casing, a detection cavity is formed in the inner casing, the detection piece is arranged in the detection cavity, the hydrophobic stone is filled between the outer casing and the inner casing, and a plurality of flow guide holes are formed in the outer casing and the inner casing.
The utility model provides a moisture sensor, in the use, bury moisture sensor underground in waiting to detect soil, make eddy current test probe be located moisture sensor's top, it enters into the detection intracavity to wait to detect the moisture in the soil and see through the casing, when moisture in detection intracavity and the soil reaches the equilibrium, moisture in the soil can stop permeating to the casing, the moisture deposit that this moment infiltration entered into the casing is below detecting the piece, eddy current test probe's measured value and eddy current test probe and the distance value of detecting between the piece are relevant, lift the detection piece through the water of compiling in detecting the intracavity, it changes to detect the distance output between piece and the eddy current test probe, can learn the moisture content in the soil through the signal that eddy current test probe detected and acquireed. This moisture sensor detects part need not directly to detect the physical contact with detecting, detects the type and the density of thing and does not have the influence to measurement accuracy, and survey crew can directly use in order to obtain the moisture content of soil, and the moisture sensor application scope of this application is wide, has both improved the measurement accuracy of sensor, has reduced survey crew's work load again.
Specifically, after soil moisture detection is completed, the moisture sensor can be taken out, moisture in the moisture sensor can be conducted to the outer side of the shell through the shell, and the moisture content in the moisture sensor is kept balanced with the external environment.
Further, the detection sheet is a metal sheet.
Specifically, the distance between the metal sheet and the eddy current detection probe changes, so that the measuring result of the eddy current detection probe changes, the water content of the object to be detected can be known based on the distance measuring result of the eddy current detection probe, and the device is convenient to use.
Furthermore, one end of the eddy current testing probe penetrates through the shell and is arranged in the testing cavity, and the arrangement direction of the eddy current testing probe is perpendicular to the metal sheet.
Specifically, the one end of current vortex flow test probe passes the casing and sets up in detecting the intracavity, and the installation and the dismantlement of the current vortex flow test probe of being convenient for set up the direction perpendicular to sheetmetal through current vortex flow test probe, when moisture entered into and detects the intracavity and lifts the sheetmetal, can directly change the distance between sheetmetal and the current vortex flow test probe for moisture sensor's testing result is more accurate.
Further, the area ratio of the metal sheet to the cross section of the eddy current inspection probe is greater than or equal to 3.
Specifically, the area of the metal sheet is larger than the cross section of the eddy current detection probe, and the area of the metal sheet is more than three times of the cross section of the eddy current detection probe, so that the eddy current detection probe can accurately know that the distance between the metal sheet and the eddy current detection probe changes.
Furthermore, the eddy current testing device further comprises an output lead, wherein the output lead is connected to one end, which does not extend into the testing cavity, of the eddy current testing probe.
Particularly, through the arrangement of the output lead, the measuring result of the eddy current testing probe is convenient to output.
Further, the outer shell and the inner shell are cuboid.
Specifically, the design of the cuboid is adopted, so that the production and the processing of the shell are convenient.
Example 1
Fig. 1 is a schematic structural diagram of an embodiment of the moisture sensor of the present invention.
As shown in fig. 1, the moisture sensor includes a housing 1, a hydrophobic stone 2, an eddy current detection probe 3, a metal piece 4, and an output lead 6.
When the water sensor is used, the water sensor is vertically embedded in soil to be measured, soil moisture penetrates through the hydrophobic stone 2 to flow water 5 into the shell 1, the metal sheet 4 is suspended on the water 5, the height of the water 5 changes, the height of the metal sheet 4 changes similarly, the eddy current detection probe 3 and the metal sheet 4 are in a vertical state, the eddy current detection probe 3 generates eddy current with the metal sheet 4 after being electrified, the current intensity of the eddy current is related to the distance, and signals are output through the output lead 6.
Further, the area of the metal sheet 4 is larger than 3 times of the detection surface of the vertical eddy current detection probe 3.
Further, if the soil moisture outside the moisture sensor is reduced, the water 5 inside the sensor is automatically discharged through the hydrophobic stone 2, and the water content of the water 5 is kept in balance with the soil moisture content. The soil moisture content can be converted by measuring the height of the variable gap.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A moisture sensor, comprising: the eddy current testing device comprises a shell, a testing sheet arranged in the shell and an eddy current testing probe positioned at one end of the shell;
the casing comprises an outer casing, an inner casing and a hydrophobic stone, the outer casing is sleeved on the outer side of the inner casing, a detection cavity is formed in the inner casing, the detection piece is arranged in the detection cavity, the hydrophobic stone is filled between the outer casing and the inner casing, and a plurality of flow guide holes are formed in the outer casing and the inner casing.
2. The moisture sensor of claim 1, wherein the sensing patch is a metal patch.
3. The moisture sensor of claim 2, wherein an end of the eddy current test probe is disposed through the housing in the test cavity, the eddy current test probe being disposed perpendicular to the metal sheet.
4. The moisture sensor of claim 3, wherein the area ratio of the metal sheet to the cross-section of the eddy current inspection probe is greater than or equal to 3.
5. The moisture sensor of claim 3, further comprising an output lead connected to an end of the eddy current test probe that does not extend into the test cavity.
6. The moisture sensor of claim 1, wherein the outer housing and the inner housing are rectangular parallelepiped shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182553.7U CN212301415U (en) | 2020-09-29 | 2020-09-29 | Moisture sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182553.7U CN212301415U (en) | 2020-09-29 | 2020-09-29 | Moisture sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212301415U true CN212301415U (en) | 2021-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022182553.7U Active CN212301415U (en) | 2020-09-29 | 2020-09-29 | Moisture sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212301415U (en) |
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2020
- 2020-09-29 CN CN202022182553.7U patent/CN212301415U/en active Active
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