CN216484472U - Soil moisture sensor calibration device - Google Patents
Soil moisture sensor calibration device Download PDFInfo
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- CN216484472U CN216484472U CN202123298161.8U CN202123298161U CN216484472U CN 216484472 U CN216484472 U CN 216484472U CN 202123298161 U CN202123298161 U CN 202123298161U CN 216484472 U CN216484472 U CN 216484472U
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Abstract
The utility model discloses a soil moisture sensor calibration device, including the vessel, be used for the weighing instrument of weighing and be used for placing the accuse temperature box of vessel, the vessel is established the second container outside first empty ware including being used for placing sample soil and first container and cover, installs the soil moisture sensor who is used for measuring sample soil moisture in the first container, is equipped with the water inlet on the second container, and first container inner chamber and second container inner chamber are linked together, and soil moisture sensor is connected with data collection station. The soil moisture sensor calibration device of the utility model can perform calibration work in a laboratory, not only reduces manpower and material resources, but also is not influenced by external environmental factors, so that the calibration result is more accurate and reliable; simultaneously through placing the container body in the accuse temperature box, can control and adjust the temperature to demarcate under same temperature and different temperatures to same sample, not only convenient operation, and the precision is high.
Description
Technical Field
The utility model relates to a measuring device technical field especially relates to a soil moisture sensor calibration device.
Background
The soil moisture sensor is used for measuring the moisture of the soil, and the soil moisture sensor is used for monitoring the soil moisture, so that a grower can optimize the water consumption, improve the product quality, reduce the unnecessary water consumption and save a large amount of funds, and the grower can make a reasonable irrigation decision and obtain the best cost benefit.
Due to the different soil textures, the soil moisture sensor needs to be calibrated before measurement to determine the accuracy of the measurement. In the prior art, a small amount of soil is taken in a sensor mounting area, and then soil samples with different water contents are manufactured to calibrate the soil moisture sensor, but because the sample size is small, disturbance of the sample has a large influence on the measurement precision, and the measured data is easy to cause inaccuracy; and the soil sampling calibration is directly carried out on the installation site, but the influence of weather and human factors is large, the measurement accuracy cannot be ensured, the calibration period is long, a large amount of manpower and material resources are required to be invested, and the cost is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a convenient operation, soil moisture sensor calibration device that measurement accuracy is high.
The utility model provides a soil moisture sensor calibration device, include:
the container body comprises a first container and a second container sleeved outside the first container, sample soil is placed in the first container, a water inlet is further formed in the second container, and an inner cavity of the first container is communicated with an inner cavity of the second container;
a soil moisture sensor mounted within the first container for measuring moisture of the sample soil;
the weighing instrument is used for weighing the container body and the sample soil;
the data collector is connected with the soil moisture sensor and is used for recording data measured by the soil moisture sensor;
the container body is placed in the temperature control box body, and the temperature control box body is provided with a control part for adjusting the temperature in the temperature control box body.
Preferably, the soil moisture sensor calibration device further comprises:
and the water outlet of the March bottle is connected with the water inlet.
Preferably, a through hole communicated with the inner cavity of the second container is formed in the bottom plate of the first container.
Preferably, the container body further comprises a sleeve arranged in the inner cavity of the first container, and the soil moisture sensor is arranged in the sleeve.
Preferably, a first connecting part is arranged on the bottom plate of the first container, and a second connecting part matched with the first connecting part is arranged at the bottom end of the sleeve.
Preferably, the side walls of the first container and the second container are made of transparent materials.
Preferably, a graduated scale is arranged on the side wall of the first container.
Preferably, the soil moisture sensor calibration device further comprises a stabilizer, and the stabilizer is connected with the soil moisture sensor.
Preferably, the soil moisture sensor calibration device further comprises a storage battery, and the storage battery is connected with the temperature control box body and used for providing electric energy.
Preferably, the weighing apparatus is an electronic balance.
The utility model provides a soil moisture sensor calibration device, which can perform calibration work in a laboratory at any time, not only reduces manpower and material resources, but also is not influenced by external environmental factors, improves the measurement precision, and makes the calibration result more accurate and reliable; simultaneously through setting up accuse temperature box, not only can realize the control to sample soil temperature to obtain a plurality of calibration data of same sample soil under the same temperature, can also realize the regulation to sample soil temperature, in order to obtain the calibration data of same sample soil under the different temperatures, not only convenient operation, and the precision is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a three-dimensional structure of a soil moisture sensor calibration device of the present invention;
FIG. 2 is a connecting structure diagram of the container body and the Ma's flask in the calibration device of the soil moisture sensor of the present invention;
FIG. 3 is a schematic view of a three-dimensional structure of a container body in the calibration device of the soil moisture sensor of the present invention;
fig. 4 is a schematic perspective view of a first container in the calibration device of the soil moisture sensor according to the present invention;
fig. 5 is a schematic view of the assembly structure of the bottom plate and the sleeve of the first container in the calibration device of the soil moisture sensor of the present invention;
fig. 6 is the utility model discloses a soil moisture sensor structure schematic diagram in soil moisture sensor calibration device.
Reference numerals
1-a container body; 2-a soil moisture sensor; 3-a weighing instrument; 4-a data acquisition unit; 5-temperature control box body; 6-March flask; 7-a storage battery; 11-a first container; 12-a second container; 13-a sleeve; 21-a pull ring; 111-a via; 112-a first connection; 113-a graduated scale; 131-a second connecting portion; 121-water inlet.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.
It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, and are used for convenience of description and simplification of description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a soil moisture sensor calibration device which comprises a container body 1, a soil moisture sensor 2, a weighing instrument 3, a data collector 4 and a temperature control box body 5.
The container body 1 comprises a first container 11 and a second container 12 sleeved outside the first container 11, sample soil is placed in the first container 11, a water inlet 121 is formed in the second container 12, and an inner cavity of the first container 11 is communicated with an inner cavity of the second container 12.
The soil moisture sensor 2 is installed in the first container 11 for measuring moisture of the sample soil.
The weighing apparatus 3 is used for weighing the container body 1 and the sample soil.
The data collector 4 is connected with the soil moisture sensor 2 and is used for recording data measured by the soil moisture sensor 2.
The container body 1 is placed in the temperature control box body 5, and the temperature control box body 5 is provided with a control part for adjusting the temperature inside the temperature control box body 5.
Wherein the first container 11 is mainly used for placing the sample soil to be detected. The first container 11 is a can body having a cavity therein and an opening at the top. The second container 12 is mainly used for humidifying the sample soil to reach a saturation state, and specifically, the second container 12 is a tank body with an inner diameter larger than the outer diameter of the first container 11, is sleeved outside the first container 11, and is coaxially arranged with the first container 11. The bottom end of the side wall of the second container 12 is provided with a water inlet 121, and the water inlet 121 is connected with an external water source through a water supply pipe. Through holes 111 can be formed in the bottom plate of the first container 11, and the through holes 111 can be arranged in a plurality of circumferential arrays so as to communicate the inner cavity of the first container 11 with the inner cavity of the second container 12, so that water in the second container 12 can enter the first container 11 conveniently to soak sample soil.
Wherein, for adding water conveniently, this soil moisture sensor calibration device can also include mah-jong bottle 6, and the delivery port and the water inlet 121 of mah-jong bottle 6 are connected, and mah-jong bottle 6 can place the top at container body 1.
Wherein, soil moisture sensor 2 can directly bury underground in sample soil, certainly, in this embodiment, for avoiding on flowing into soil moisture sensor 2 because of rivers, influence measuring result, vessel 1 can also be including locating the sleeve pipe 13 of first container 11 inner chamber, and soil moisture sensor 2 installs in sleeve pipe 13, and sleeve pipe 13 can adopt the preparation of polyvinyl chloride material. The sleeve 13 may be integrally formed with the first container 11, or as shown in fig. 5, the sleeve 13 and the first container 11 may be of a split structure, and for fixing the split sleeve 13 and the first container 11, a first connection portion 112 may be provided on a bottom plate of the first container 11, and a second connection portion 131 matched with the first connection portion 112 may be provided at a bottom end of the sleeve 13. The first connection portion 112 may include a through hole penetrating through a bottom plate of the first container 11, and a groove coaxially disposed with the through hole on the bottom plate of the first container 11, the second connection portion 131 may include a connection shaft fitted with the through hole, and a connection disc fitted with the groove, and the first connection portion 112 and the second connection portion 131 may be sealed by a bonding adhesive after being assembled, thereby preventing water from entering the sleeve 13.
The weighing device 3 may be an electronic balance.
Wherein, data collection station 4 can be connected with soil moisture sensor 2 electricity through the cable.
Wherein, accuse temperature box 5 mainly used controls the temperature of sample soil, avoids sample soil temperature variation to cause the influence to soil moisture sensor measurement. The temperature control box body 5 can be an intelligent electric heating constant temperature drying box, and a working space for placing the container body 1 is arranged inside the temperature control box body. The control part can be a control panel arranged outside the temperature control box body 5 and used for adjusting the temperature in the working space.
When the soil moisture sensor calibration device is used, firstly, sample soil to be measured is placed in a first container 11, the first container 11 and the sample soil are placed in a second container 12, a switch of a Ma bottle 6 is turned on, water is added into the second container 12, so as to soak the sample soil until the sample soil is completely saturated, the container body 1 filled with the sample soil is put into a temperature control box body 5, the temperature in the temperature control box body 5 is set according to the actual temperature in the soil, the soil moisture of the sample is measured by the soil moisture sensor 2, because the moisture of the sample soil is continuously evaporated, the sample soil needs to be measured at intervals, and after each measurement, the mass of the soil sample needs to be weighed at the next measurement time interval, when the mass difference between the two measurements is around 80g, the next measurement is taken (it is to be noted that the soil measurement must be kept at the same temperature throughout each calibrated sample). And the data measured by the soil moisture sensor 2 is recorded by the data collector 4 until the sample soil is close to or reaches a dry soil state, and the measurement is finished. According to the weight value that 3 measurings of weighing instrument, calculate sample soil volume moisture content in first container 11, according to the data that soil moisture sensor 2 measured, calculate sample soil volume moisture content in first container 11 to according to the result that the calculation reachs, rectify soil moisture sensor 2.
Wherein, the calculation of the mass measurement volume water content is as follows:
total mass M measured during the first saturation of the first container 11 and of the sample soiliThe total mass M of the first container 11 and the sample soil at the last time when the sample soil in the first container 11 contains no free moisture at all (n-th measurement)n。
The volume of the sample soil in the first container 11 is:
r is the outer radius of the sleeve; r is the inner radius of the first container 11, and H is the height of the sample soil in the first container 11.
The mass determination volume water content obtained at the nth measurement is:
wherein, the calculation of the volume water content measured by the soil water sensor 2 is as follows:
reading the normalization frequency of each measurement from the soil moisture sensor 2, taking the average value of the repeated normalization frequency of each measurement as SFi, and calculating the water content value of the soil moisture sensor 2 in the ith measurement volume as:
therefore, the soil moisture sensor calibration device provided by the utility model can perform calibration work in a laboratory at any time, not only reduces manpower and material resources, but also is not affected by external environmental factors, improves the measurement precision, and makes the calibration result more accurate and reliable; simultaneously through setting up accuse temperature box, not only can realize the control to sample soil temperature to obtain a plurality of calibration data of same sample soil under the same temperature, can also realize the regulation to sample soil temperature, in order to obtain the calibration data of same sample soil under the different temperatures, not only convenient operation, and the precision is high.
Further, a filter paper may be laid in the first container 11, the filter paper being positioned on the bottom surface of the sample soil, and the filter paper may be provided to allow water in the second container 12 to be soaked in the first container 11, thereby soaking the sample soil, and preventing the sample soil in the first container 11 from leaking out of the first container 11 due to water addition or drying.
Furthermore, the side walls of the first container 11 and the second container 12 are made of transparent materials so as to facilitate observation of changes of the sample soil placed in the containers, and the thickness of the side wall of the first container 11 should be not less than 5mm so as to prevent the containers from being broken due to the fact that the sample soil placed in the first container 11 is heavy in weight.
As the utility model discloses a further preferred, be equipped with scale 113 on the lateral wall of first container 11, the height of the sample soil of placing in first container 11 can very convenient observation through the scale.
Furthermore, this soil moisture sensor calibration device still includes the stabilizer, and soil moisture sensor 2 is connected to the stabilizer, and the stabilizer can be the support that supports soil moisture sensor 2 for play the effect of stabilizing soil moisture sensor 2, prevent that soil moisture sensor 2 from rotating when measuring, taking place the skew, thereby influence measuring result.
Because the measuring time is longer, in order to prevent the measurement interruption caused by power failure in the calibration process, the soil moisture sensor calibration device also comprises a storage battery 7, and the storage battery 7 is connected with the temperature control box body 5 and used for providing electric energy.
Further, as shown in fig. 6, a pulling ring 21 may be provided on the top of the soil moisture sensor 2 to facilitate the removal of the soil moisture sensor 2 from the casing 13.
It should be noted that, in this document, 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.
The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. While the foregoing is only a preferred embodiment of the present invention, it should be noted that there are no specific structures that can be objectively infinite due to the limitation of the number expression, and it will be apparent to those skilled in the art that a number of modifications, decorations, or changes can be made without departing from the principle of the present invention, and the above technical features can also be combined in a suitable manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.
Claims (10)
1. A soil moisture sensor calibration device, characterized by includes:
the container comprises a container body (1), wherein the container body (1) comprises a first container (11) and a second container (12) sleeved outside the first container (11), sample soil is placed in the first container (11), a water inlet (121) is formed in the second container (12), and an inner cavity of the first container (11) is communicated with an inner cavity of the second container (12);
a soil moisture sensor (2), said soil moisture sensor (2) being mounted within said first container (11) for measuring moisture of said sample soil;
a weighing instrument (3), the weighing instrument (3) being used for weighing the container body (1) and the sample soil;
the data collector (4) is connected with the soil moisture sensor (2) and is used for recording data measured by the soil moisture sensor (2);
temperature control box body (5), place vessel (1) in the temperature control box body (5), be equipped with on temperature control box body (5) and be used for adjusting the control part of the inside temperature of temperature control box body (5).
2. The soil moisture sensor calibration device of claim 1, further comprising:
the water outlet of the March bottle (6) is connected with the water inlet (121).
3. The soil moisture sensor calibration device according to claim 1 or 2, wherein a through hole (111) communicated with the inner cavity of the second container (12) is formed in the bottom plate of the first container (11).
4. The soil moisture sensor calibration device according to claim 1 or 2, wherein the container body (1) further comprises a sleeve (13) arranged in the inner cavity of the first container (11), and the soil moisture sensor (2) is installed in the sleeve (13).
5. The soil moisture sensor calibration device according to claim 4, wherein a first connecting portion (112) is provided on the bottom plate of the first container (11), and a second connecting portion (131) matched with the first connecting portion (112) is provided at the bottom end of the sleeve (13).
6. The soil moisture sensor calibration device according to claim 1 or 2, wherein the side walls of the first container (11) and the second container (12) are made of transparent materials.
7. The soil moisture sensor calibration device according to claim 6, wherein a graduated scale (113) is arranged on the side wall of the first container (11).
8. The soil moisture sensor calibration device according to claim 1, further comprising a stabilizer connected to the soil moisture sensor (2).
9. The soil moisture sensor calibration device according to claim 1, further comprising a storage battery (7), wherein the storage battery (7) is connected with the temperature control box body (5) and is used for providing electric energy.
10. The soil moisture sensor calibration device according to claim 1, wherein the weighing instrument (3) is an electronic balance.
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| CN202123298161.8U CN216484472U (en) | 2021-12-23 | 2021-12-23 | Soil moisture sensor calibration device |
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| CN202123298161.8U CN216484472U (en) | 2021-12-23 | 2021-12-23 | Soil moisture sensor calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008507A (en) * | 2022-12-29 | 2023-04-25 | 中国科学院空天信息创新研究院 | Automatic calibration method and system for soil moisture sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008507A (en) * | 2022-12-29 | 2023-04-25 | 中国科学院空天信息创新研究院 | Automatic calibration method and system for soil moisture sensor |
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