CN210442293U

CN210442293U - Soil moisture sensor

Info

Publication number: CN210442293U
Application number: CN201921061564.0U
Authority: CN
Inventors: 谢坤林; 曹明; 李洪权
Original assignee: Guangzhou Xaircraft Technology Co Ltd
Current assignee: Guangzhou Xaircraft Technology Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-05-01
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a soil moisture sensor, including casing, detection electrode and circuit board, the outer wall of casing is the concave recess that is equipped with, and two at least detection electrode are installed to the interval in the recess, and every detection electrode all is connected with the circuit board electricity, and two at least detection electrode set up along the width direction or the length direction interval of recess. Through set up the recess on the casing to install two at least detection electrode intervals in the recess, because the electric potential distribution between two detection electrodes is densest, when soil moisture sensor installed in soil, partial soil can be located between two detection electrodes in the recess, makes soil and detection electrode fully contact, has improved detectivity and range.

Description

Soil moisture sensor

Technical Field

The utility model relates to a soil moisture detects technical field, especially relates to a soil moisture sensor.

Background

Common soil moisture measurement techniques include an artificial drying method, a dielectric constant method, a neutron method and the like. The dielectric constant method is a method of converting the dielectric constant into the water content of soil by detecting the dielectric constant, and a frequency domain method (FDR), a time domain method (TDR), and the like among the dielectric constant methods are mainly used in engineering projects. The soil moisture sensor with multiple depths generally adopts the following two structures: the soil moisture sensor adopts the metal ring as an electrode, the metal ring is arranged in a round pipe, every two metal rings are a set of sensor unit, the water content of a plurality of positions can be detected by a plurality of sets of sensor units, and the integration level is high. The soil moisture sensor has small measuring range because of no direct contact with soil, the metal ring needs to have a large enough diameter to achieve higher precision, and the sensor has large integral volume and is inconvenient to install; the second type is a pin type sensor, which needs to be installed with a plurality of sensors corresponding to different depths, and although the pin type sensor has high detection precision, a section needs to be dug in a soil measurement area, and then the sensors are respectively inserted into different depths, so that the integration level is low and the installation mode is complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the soil moisture sensor is simple in structure, small in size, large in measuring range and high in precision.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a soil moisture sensor, includes casing, detection electrode and circuit board, the recess is equipped with on the outer wall of casing, at least two are installed at the interval in the recess detection electrode, every detection electrode all with the circuit board electricity is connected, at least two detection electrode follows the width direction or the length direction interval of recess set up.

As a preferable aspect of the soil moisture sensor, a length of the detection electrode extends in a length direction of the housing.

As a preferable mode of the soil moisture sensor, a surface of the detection electrode is flush with a notch of the groove.

As a preferable mode of the soil moisture sensor, the detection electrode partially protrudes from the notch of the groove.

As a preferable scheme of the soil moisture sensor, the circuit board is hermetically arranged in the housing.

As a preferable scheme of the soil moisture sensor, an accommodating cavity used for installing the circuit board is formed in the shell, a sealant for sealing the circuit board is filled in the accommodating cavity, and a glue filling opening communicated with the accommodating cavity is formed in the shell.

As a preferable mode of the soil moisture sensor, at least one connection port through which a lead wire passes is provided on the housing.

As a preferable scheme of the soil moisture sensor, the housing includes an upper housing and a lower housing which are detachably connected, and a receiving cavity for mounting the circuit board is formed between the upper housing and the lower housing.

As a preferable scheme of the soil moisture sensor, the groove is concavely arranged on one side of the upper shell, which is far away from the lower shell, and the circuit board is fixed on the inner wall of the upper shell and positioned on the back side of the groove bottom of the groove.

As a preferred scheme of soil moisture sensor, the casing has relative third side and the fourth side that sets up, the third side with the fourth side all is connected the casing is seted up the side of recess, all set up the buckle on the third side with the fourth side.

The utility model discloses beneficial effect does: through set up the recess on the casing to install two at least detection electrode intervals in the recess, because the electric potential distribution between two detection electrodes is densest, when soil moisture sensor installed in soil, partial soil can be located between two detection electrodes in the recess, makes soil and detection electrode fully contact, has improved detectivity and range.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic perspective view of a soil moisture sensor according to an embodiment of the present invention.

Fig. 2 is a schematic top view of a soil moisture sensor according to an embodiment of the present invention.

Fig. 3 is a schematic bottom view of a soil moisture sensor according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a side view of a soil moisture sensor according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a soil moisture sensor according to an embodiment of the present invention.

Fig. 6 is the utility model discloses soil moisture check out test set's schematic structure view.

Fig. 7 is a schematic cross-sectional view of a soil moisture sensor according to an embodiment of the present invention (the other half of the main body housing is not shown).

In the figure:

100. a soil moisture sensor; 1. a housing; 11. a groove; 12. an accommodating chamber; 13. pouring a glue opening; 14. a first side surface; 15. a second side surface; 16. a connecting port; 17. an upper housing; 18. a lower housing; 19. a third side; 110. a fourth side; 2. a circuit board; 3. a detection electrode; 4. buckling;

200. a main body; 210. a main body housing; 220. an inner cavity; 230. a convex portion.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 6, the present invention provides a soil moisture sensor 100 for detecting the moisture content in soil. The soil moisture sensor 100 is an indispensable component of a soil moisture detecting apparatus, which includes a rod-shaped main body 200, a plurality of soil moisture sensors 100 are provided at intervals along a longitudinal direction of the main body 200 on the main body 200, and the plurality of soil moisture sensors 100 are connected in series and then connected to a controller (not shown) in the main body 200. This soil moisture check out test set can detect the moisture of the soil of the different degree of depth simultaneously, and soil moisture sensor 100 integrated level is high, and the mounting means is simple, need not dig a cross-section in soil measurement area and install.

Referring to fig. 1 to 7, in the present embodiment, the soil moisture sensor 100 includes a housing 1, a detection electrode 3, and a circuit board 2, a groove 11 is concavely provided on an outer wall of the housing 1, at least two detection electrodes 3 are installed in the groove 11 at intervals, each detection electrode 3 is electrically connected to the circuit board 2, and the at least two detection electrodes 3 are arranged at intervals along a width direction or a length direction of the groove 11. Through set up recess 11 on casing 1 to install at least two detection electrode 3 intervals in recess 11, because the electric potential distribution between two detection electrode 3 is densest, when soil moisture sensor 100 installed in soil, partial soil can be located between two detection electrode 3 in recess 11, makes soil and detection electrode 3 fully contact, has improved detectivity and range.

Specifically, the circuit board 2 is hermetically disposed in the housing 1. This design can make soil moisture sensor 100's integrated level high, and circuit board 2 does not expose, need not to set up other structures and encapsulates it, reduces the equipment and the installation degree of difficulty.

Of course, the circuit board 2 can also be arranged outside the shell 1, the circuit board 2 can be selectively sealed by other shells with cavities, or directly packaged by sealant, or a mounting cavity is arranged on the main body 200 of the soil moisture detection device, and the circuit board 2 is packaged in the mounting cavity by the sealant.

In one embodiment, the recess 11 is a rectangular recess, the detecting electrodes 3 are elongated, when at least two detecting electrodes 3 are spaced apart along the width direction of the recess 11, the length of the detecting electrodes 3 extends along the length direction of the recess 11, and when at least two detecting electrodes 3 are spaced apart along the length direction of the recess 11, the length of the detecting electrodes 3 extends along the width direction of the recess 11.

In this embodiment, three detection electrodes 3 are disposed in the groove 11, the three detection electrodes 3 are disposed at intervals along the width direction of the groove 11, and two detection electrodes 3 are respectively attached to two opposite groove walls of the groove 11 in the width direction. The length of the detection electrode 3 can be the same as the length direction of the groove 11 through the design, more soil can be contacted with the detection electrode 3 in the rectangular groove 11, and the detection precision and the measuring range of the detection electrode 3 are improved.

Of course, the groove 11 is not limited to be rectangular, but may also be circular, oval or shaped. In addition, the detection electrode 3 is not limited to be long, and may be circular, elliptical or irregular.

Further, the length of the detection electrode 3 extends in the longitudinal direction of the case 1. The design can improve the length of the exposed part of the detection electrode 3, namely, the contact area of the detection electrode 3 and the soil is improved, and the detection precision and the measuring range of the detection electrode 3 are improved.

In one embodiment, the surface of the detection electrode 3 is flush with the notch of the recess 11. The design can ensure that the position with the most dense potential distribution between the two detection electrodes 3 is positioned in the groove 11, so that the soil in the groove 11 is contacted more fully, and the detection precision and the measuring range are effectively improved.

In other embodiments, the detection electrode 3 partially protrudes from the notch of the recess 11.

In one embodiment, a containing cavity 12 for installing the circuit board 2 is formed in the housing 1, the containing cavity 12 is filled with sealant for sealing the circuit board 2, and the housing 1 is provided with a sealant filling port 13 communicated with the containing cavity 12. Through sealed glue of embedment in holding chamber 12, can seal the processing to circuit board 2, prevent that the water in the soil from entering into casing 1 and damaging circuit board 2, encapsulating mouth 13 can be convenient for circuit board 2 carries out the encapsulating processing after installing to casing 1.

In this embodiment, the groove 11 is disposed on a first side surface 14 of the housing 1, the glue filling opening 13 is disposed on a second side surface 15 of the housing 1, and the first side surface 14 is disposed opposite to the second side surface 15.

Specifically, the first side 14 is an upper surface of the housing 1, and the second side 15 is a lower surface of the housing 1.

Of course, the sealing process of the circuit board 2 is not limited to the above-mentioned manner, and the housing 1 may be a sealed housing, that is, a sealing structure is disposed at the joint or the opening of the housing 1, and the sealing structure may be a sealing ring or a sealing glue.

In one embodiment, the housing 1 is provided with at least one connection port 16 for a wire to pass through. By arranging the connecting ports 16, the series connection between the adjacent soil moisture sensors 100 can be realized, and when two adjacent soil moisture sensors 100 need to be connected in series, a lead connected with the circuit board 2 is led out from the connecting port 16 of one soil moisture sensor 100 to be connected with the circuit board 2 in the other soil moisture sensor 100.

In the present embodiment, the housing 1 is provided with two connection ports 16, and the two connection ports 16 are provided at both ends of the housing 1 in the longitudinal direction.

In one embodiment, the housing 1 includes an upper housing 17 and a lower housing 18 detachably connected, and a receiving cavity 12 for mounting the circuit board 2 is formed between the upper housing 17 and the lower housing 18. By providing the housing 1 as a split structure, the mounting of the circuit board 2 and the wiring of the wires can be facilitated.

In the present embodiment, the groove 11 is recessed in a side of the upper housing 17 facing away from the lower housing 18, and the circuit board 2 is fixed to an inner wall of the upper housing 17 and located on a back side of a groove bottom of the groove 11. By fixing the circuit board 2 at the groove bottom back side of the groove 11, the distance between the detection electrode 3 and the circuit board 2 can be shortened to facilitate electrical connection of the detection electrode 3 and the circuit board 2.

Referring to fig. 1 to 5 and 7, the housing 1 has a third side 19 and a fourth side 110 opposite to each other, the third side 19 and the fourth side 110 are both connected to a side of the housing 1 (i.e. the first side 14 of the housing 1) where the groove 11 is formed, and the third side 19 and the fourth side 110 are both provided with the latch 4.

Specifically, the third side 19 and the fourth side 110 are both provided on the upper case 17.

The buckle 4 is of a plate-shaped structure, one end of the buckle 4 is fixedly connected with the third side surface 19 and the fourth side surface 110, the other end of the buckle is suspended, and the buckle 4 is arranged at an acute angle with the third side surface 19 and the fourth side surface 110.

The main body 200 of the soil moisture detection device is composed of two main body shells 210 which are arranged in a buckled mode, an inner cavity 220 is formed between the two main body shells 210, one main body shell 210 is provided with an opening communicated with the inner cavity 220 of the main body 200, a convex part 230 is arranged on the cavity wall of the inner cavity 220 of the main body 200 in a protruding mode, the soil moisture sensor 100 is installed in the inner cavity 220 of the main body shell 210 from the inner side, the buckle 4 on the side face of the soil moisture sensor 100 is deformed through extrusion (the hanging end of the buckle 4 is extruded to face towards the third side 19 or the fourth side 110 close to the third side), after the soil moisture sensor 100 is installed in place, the hanging end of the buckle 4 is abutted to one side, close to the opening, of the convex part 230, the soil moisture sensor 100 is pre-fixed in the inner cavity 220 of the main body 200, and therefore the.

In the description herein, it is to be understood that the terms "upper" and "lower" are used in a descriptive sense only and not for purposes of limitation, and are not to be construed as indicating or implying that a particular device or element must have a particular orientation, be constructed and operated in a particular manner, based on the orientation or positional relationship shown in the figures.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a soil moisture sensor, its characterized in that, includes casing, detection electrode and circuit board, the recess is equipped with on the outer wall of casing, at least two are installed at the interval in the recess detection electrode, every detection electrode all with the circuit board electricity is connected, at least two detection electrode follows the width direction or the length direction interval of recess set up.

2. The soil moisture sensor of claim 1, wherein a length of the detection electrode extends along a length direction of the housing.

3. The soil moisture sensor of claim 1, wherein a surface of the detection electrode is flush with a notch of the groove.

4. The soil moisture sensor of claim 1, wherein the sensing electrode portion protrudes from a notch of the recess.

5. The soil moisture sensor of claim 1, wherein the circuit board is sealingly disposed within the housing.

6. The soil moisture sensor of claim 5, wherein the housing has a cavity for mounting the circuit board therein, the cavity is filled with a sealant for sealing the circuit board, and the housing is provided with a glue filling opening communicated with the cavity.

7. The soil moisture sensor of claim 5, wherein the housing is provided with at least one connection port for a lead wire to pass through.

8. The soil moisture sensor of claim 5, wherein the housing comprises an upper housing and a lower housing that are detachably connected, and a receiving cavity for mounting the circuit board is formed between the upper housing and the lower housing.

9. The soil moisture sensor of claim 8, wherein the recess is formed in a side of the upper housing facing away from the lower housing, and the circuit board is fixed to an inner wall of the upper housing and is positioned on a back side of a bottom of the recess.

10. The soil moisture sensor of claim 1, wherein the housing has a third side and a fourth side opposite to each other, the third side and the fourth side are both connected to the side of the housing where the groove is formed, and the third side and the fourth side are both provided with a buckle.