CN108844997B - Soil water and salt content measuring device and method - Google Patents
Soil water and salt content measuring device and method Download PDFInfo
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- CN108844997B CN108844997B CN201810501946.4A CN201810501946A CN108844997B CN 108844997 B CN108844997 B CN 108844997B CN 201810501946 A CN201810501946 A CN 201810501946A CN 108844997 B CN108844997 B CN 108844997B
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- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
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Abstract
The invention provides a device and a method for measuring water and salt content of soil, comprising the following steps: the device comprises a soil conductivity detection sensor, a position sensor and a controller; the soil conductivity detection sensor comprises a plurality of groups of disks which are arranged in parallel and have different diameters, and the disks with different diameters are used for detecting the conductivity of the soil with different depths; each disc is provided with an electrode, when the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the discs form a corresponding electric field after being electrified; the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected. The invention can quickly measure a large amount of soil samples and can complete the measurement of the water and salt content of the soil in real time.
Description
Technical Field
The invention relates to the technical field of agricultural production, in particular to a device and a method for measuring water and salt content of soil.
Background
When soil texture investigation is carried out, the water and salt content of soil is a key index, namely the measurement requirement of the water and salt content of soil is large.
The existing measuring mode of the water and salt content of the soil is to take back a soil sample and then measure the soil sample in a laboratory by adopting a traditional water and salt measuring instrument, and the problems of time and labor waste, poor precision and low timeliness exist.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an automatic measuring device for soil organic matters, which can quickly measure a large number of soil samples and can complete the measurement of the water and salt content of soil in real time.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a soil water salt content measuring device, which is characterized by comprising: the device comprises a soil conductivity detection sensor, a position sensor and a controller;
the soil conductivity detection sensor comprises a plurality of groups of disks which are arranged in parallel and have different diameters, and the disks with different diameters are used for detecting the conductivity of the soil with different depths; convex patterns are arranged on the surface of the disc;
each disc is provided with an electrode, the electrodes are connected with the controller through leads, when the electrodes are electrified, an electric field is formed between the two discs, and the controller collects formed electric field information and corresponding time information;
the measuring device further includes: the support is arranged at one end, far away from soil, of the soil conductivity detection sensor, a plurality of ultrasonic sensors are placed on the support, the ultrasonic sensors are arranged at intervals with the disc, and the ultrasonic sensors are used for acquiring conductivity measurement depth information in the measurement process;
in the process that the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the disc are electrified to form a corresponding electric field; correspondingly, the controller is used for storing the collected electric field information and the corresponding measurement depth information and time information in the dragging process of the measuring device; the controller is also used for storing the position information acquired by the position sensor and the corresponding time information;
the controller is used for converting the corresponding relation between the stored electric field information and the depth and the time into the corresponding relation between the soil conductivity and the depth and the time and storing the corresponding relation;
the controller is used for correcting the obtained soil conductivity according to a preset temperature compensation curve; the abscissa axis of the preset temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil salinity and the time according to a first preset conversion relation and storing the corresponding relation;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil water content and the time according to a second preset conversion relation and storing the corresponding relation;
the controller is used for storing the soil water content information and the position information corresponding to the same time point to obtain the soil water content information of each position point in the soil area to be detected;
the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected.
Further, the controller is configured to correct the obtained soil conductivity according to a preset temperature compensation curve, and includes:
and the controller multiplies the soil conductivity at the corresponding depth by the temperature compensation coefficient at the corresponding depth to obtain the corrected soil conductivity.
Furthermore, a plurality of temperature sensors are arranged on each disk, and the angles of the temperature sensors on different disks and the positions of the temperature sensors on different disks, which are arranged on the disks, are different from the center of the circle;
the controller is also used for storing the temperature information acquired by the temperature sensor positioned on the disc and the corresponding time information;
the controller is also used for generating a first temperature compensation curve according to temperature information acquired by a temperature sensor positioned on the disc and conductivity measurement depth information acquired by the ultrasonic sensor;
correspondingly, the controller is used for correcting the obtained soil conductivity according to the first temperature compensation curve; the abscissa axis of the first temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient.
Further, the first predetermined conversion relationship is: and y is 0.0247x +0.2638, wherein x is the conductivity and y is the soil salinity.
Further, the second predetermined conversion relationship is: and y is 2.4736x +3.4979, wherein x is the conductivity and y is the soil moisture content.
Furthermore, the dragging device is connected with the soil conductivity detection sensor through a parallel four-bar linkage.
Further, the dragging device is a tractor, and correspondingly, the parallel four-bar linkage is fixed at the position of the tractor counterweight iron.
Further, the measuring device further includes: the protection land wheel sets up on the soil conductivity detection sensor, be used for the soil conductivity detection sensor towed in-process shock attenuation.
Further, the ground protection wheel is provided with a pressure sensor for measuring the pressure condition of the ground protection wheel during the rotation of the ground protection wheel.
Further, the controller is also used for carrying out normalization processing on the electric field signals detected by the soil conductivity detection sensor.
According to the technical scheme, the soil water salt content measuring device provided by the invention comprises: the device comprises a soil conductivity detection sensor, a position sensor and a controller; the soil conductivity detection sensor comprises a plurality of groups of disks which are arranged in parallel and have different diameters, and the disks with different diameters are used for detecting the conductivity of the soil with different depths; each disc is provided with an electrode, the electrodes are connected with the controller through leads, when the electrodes are electrified, an electric field is formed between the two discs, and the controller collects formed electric field information and corresponding time information; the measuring device further includes: the support is arranged at one end, far away from soil, of the soil conductivity detection sensor, a plurality of ultrasonic sensors are placed on the support, the ultrasonic sensors are arranged at intervals with the disc, and the ultrasonic sensors are used for acquiring conductivity measurement depth information in the measurement process; in the process that the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the disc are electrified to form a corresponding electric field; correspondingly, the controller is used for storing the collected electric field information and the corresponding measurement depth information and time information in the dragging process of the measuring device; the controller is also used for storing the position information acquired by the position sensor and the corresponding time information; the controller is used for converting the corresponding relation between the stored electric field information and the depth and the time into the corresponding relation between the soil conductivity and the depth and the time and storing the corresponding relation; the controller is used for correcting the obtained soil conductivity according to a preset temperature compensation curve; the abscissa axis of the preset temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient; the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil water content and the time according to a first preset conversion relation and storing the corresponding relation; the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil salinity and the time according to a second preset conversion relation and storing the corresponding relation; the controller is used for storing the soil water content information and the position information corresponding to the same time point to obtain the soil water content information of each position point in the soil area to be detected; the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected. Therefore, the method can automatically and quickly acquire the water and salt content in the soil, is trouble-saving and labor-saving, has high timeliness, takes temperature compensation into consideration, and corrects the measurement precision by utilizing the temperature compensation, so that the measurement precision can be obviously improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a soil water salt content measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the position relationship between the dragging device and the soil water and salt content measuring device;
FIG. 3 is a schematic diagram showing the arrangement position of the temperature sensor on the disk;
FIG. 4 is a graphical illustration of the relationship between temperature compensation coefficient and conductivity measurement depth;
FIG. 5 is a schematic diagram of a normalization process;
FIG. 6 is a graph showing the relationship between conductivity and soil salinity;
fig. 7 is a graph showing the relationship between conductivity and soil moisture content.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a soil water salt content measuring device, including: a soil conductivity detection sensor, a position sensor (not shown in the figure) and a controller;
referring to fig. 1, the soil conductivity detection sensor includes a plurality of sets of disks arranged in parallel and having different diameters, and the disks having different diameters are used for detecting the conductivity of the soil at different depths; for example, the diameter of the disc can be any value of 20-60 cm; the surface of the disc is provided with convex patterns to enhance the strength and avoid being stuck by soil;
each disk is provided with an electrode (not shown in the figure), the electrode is connected with the controller through a lead, when the electrodes are electrified, an electric field is formed between the two disks, and the controller collects formed electric field information and corresponding time information; it will be appreciated that the disc may be replaced by a plow electrode;
the measuring device further includes: the support is arranged at one end, far away from soil, of the soil conductivity detection sensor, a plurality of ultrasonic sensors are placed on the support, the ultrasonic sensors are arranged at intervals with the disc, and the ultrasonic sensors are used for acquiring conductivity measurement depth information in the measurement process;
in the process that the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the disc are electrified to form a corresponding electric field; correspondingly, the controller is used for storing the collected electric field information and the corresponding measurement depth information and time information in the dragging process of the measuring device; for the purpose of accurately controlling detection layer by layer, preferably, the electric field signal detected by the soil conductivity detection sensor is normalized, the signal intensity is linearly normalized to 0-1, and the unit of the signal quantity is eliminated, which can be specifically referred to as the signal normalization processing process shown in fig. 5;
the controller is also used for storing the position information acquired by the position sensor and the corresponding time information;
the controller is used for converting the corresponding relation between the stored electric field information and the depth and the time into the corresponding relation between the soil conductivity and the depth and the time and storing the corresponding relation; it is understood that the process of converting soil electric field information into soil conductivity by the controller belongs to the prior art, and the detailed description is omitted here.
The controller is used for correcting the obtained soil conductivity according to a preset temperature compensation curve; the abscissa axis of the preset temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil salinity and the time according to a first preset conversion relation and storing the corresponding relation; the first preset conversion relation is a soil salinity prediction model obtained in advance through a multiple regression prediction method;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil water content and the time according to a second preset conversion relation and storing the corresponding relation; the second preset conversion relation is a soil water content prediction model obtained in advance through a multiple regression prediction method;
the controller is used for storing the soil water content information and the position information corresponding to the same time point to obtain the soil water content information of each position point in the soil area to be detected;
the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected.
As can be seen from the above description, the soil water salt content measuring device provided in this embodiment includes: the device comprises a soil conductivity detection sensor, a position sensor and a controller; the soil conductivity detection sensor comprises a plurality of groups of disks which are arranged in parallel and have different diameters, and the disks with different diameters are used for detecting the conductivity of the soil with different depths; each disc is provided with an electrode, the electrodes are connected with the controller through leads, when the electrodes are electrified, an electric field is formed between the two discs, and the controller collects formed electric field information and corresponding time information; the measuring device further includes: the support is arranged at one end, far away from soil, of the soil conductivity detection sensor, a plurality of ultrasonic sensors are placed on the support, the ultrasonic sensors are arranged at intervals with the disc, and the ultrasonic sensors are used for acquiring conductivity measurement depth information in the measurement process; in the process that the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the disc are electrified to form a corresponding electric field; correspondingly, the controller is used for storing the collected electric field information and the corresponding measurement depth information and time information in the dragging process of the measuring device; the controller is also used for storing the position information acquired by the position sensor and the corresponding time information; the controller is used for converting the corresponding relation between the stored electric field information and the depth and the time into the corresponding relation between the soil conductivity and the depth and the time and storing the corresponding relation; the controller is used for correcting the obtained soil conductivity according to a preset temperature compensation curve (as shown in figure 4); the abscissa axis of the preset temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient; the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil water content and the time according to a first preset conversion relation and storing the corresponding relation; the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil salinity and the time according to a second preset conversion relation and storing the corresponding relation; the controller is used for storing the soil water content information and the position information corresponding to the same time point to obtain the soil water content information of each position point in the soil area to be detected; the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected. Therefore, the method can automatically and quickly acquire the water and salt content in the soil, is trouble-saving and labor-saving, has high timeliness, takes temperature compensation into consideration, and corrects the measurement precision by utilizing the temperature compensation, so that the measurement precision can be obviously improved.
In a preferred embodiment, the controller is configured to modify the obtained soil conductivity according to a preset temperature compensation curve (as shown in fig. 4), and comprises:
and the controller multiplies the soil conductivity at the corresponding depth by the temperature compensation coefficient at the corresponding depth to obtain the corrected soil conductivity.
In a preferred embodiment, a plurality of temperature sensors are arranged on each disk, and the temperature sensors on different disks are arranged at different angles and different positions away from the center of the circle;
the controller is also used for storing the temperature information acquired by the temperature sensor positioned on the disc and the corresponding time information;
the controller is also used for generating a first temperature compensation curve according to temperature information acquired by a temperature sensor positioned on the disc and conductivity measurement depth information acquired by the ultrasonic sensor;
correspondingly, the controller is used for correcting the obtained soil conductivity according to the first temperature compensation curve; the abscissa axis of the first temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient.
It can be understood that, when the first temperature compensation curve is generated, the temperature value acquired corresponding to the depth segment may be subtracted from the preset temperature value of the depth segment, and the temperature compensation coefficient of the depth segment is determined according to the difference.
It is understood that the average value of the temperature values collected by the plurality of temperature sensors on the disk can be used as the collected temperature value.
It will be appreciated that 8 discs can be installed at a time, 3 of which are measuring discs (1, 3, 4 in the figure, the roles can be changed) and 1 of which is a transmitting disc, the order being reversed. There are six groups of disks, and 48 disks can be combined. The difference between each group of disks is that the angle and the position from the center of the circle of the temperature sensor are different. Referring to fig. 3, the sensors on the disks are arranged at different positions, so as to avoid temperature abnormality caused by friction of uneven sand grains in soil, and errors can be effectively eliminated by adopting different arrangement positions.
According to the method, the temperature value is acquired while the soil electromagnetic field information is acquired, and the electromagnetic field information (namely, the conductivity information) is corrected according to the corresponding depth temperature value, so that a more accurate measurement result is obtained.
In a preferred embodiment, the disc is connected to a controller through a brush, and the controller continuously generates a modulation electric field through an algorithm and simultaneously receives other secondary magnetic fields conducted by soil, and the voltage signals are combined with a position point (such as a GPS point) and are stored correspondingly. In this embodiment, the modulation program of the electric field is closely related to the diameters of the different disks. The output of the modulation signal can also be related to the parameter of the diameter of the disc, so that the precision of acquiring the soil conductivity data can be improved. In a set of discs, one is a transmitting end and the other is a receiving end, wherein the frequency of the transmitting end is a sinusoidal signal and the frequency is 450 Hz. The transmitting end adopts discrete elements to form an RC oscillating circuit to generate a sinusoidal signal. Specifically, a negative feedback (an amplifier and a field effect transistor are used for stabilizing and optimizing the amplitude) is additionally arranged on the traditional RC oscillating circuit, so that a stable electromagnetic field signal can be obtained, and a more accurate measurement result can be obtained.
In a preferred embodiment, referring to fig. 6, the first predetermined conversion relationship is: y is 0.0247x + 0.2638. Namely, the soil salt content prediction model is as follows: y is 0.0247x +0.2638, and the model determines the coefficient R2＝0.9682。
In a preferred embodiment, referring to fig. 7, the second predetermined conversion relationship is: y 2.4736x + 3.4979. Namely, the soil water content prediction model is as follows: 2.4736x +3.4979, model decision coefficient R2＝0.9689。
In a preferred embodiment, referring to fig. 2, the dragging device is connected with the soil conductivity detection sensor through a parallel four-bar linkage.
In a preferred embodiment, the traction device is a tractor, and accordingly, the parallel four-bar linkage is fixed at the position of the weight iron of the tractor.
In this embodiment, the soil conductivity detection sensor is fixed in front of the tractor, the bolt is fixed in front within 1.5 m in front of the tractor to measure soil organic matter, and the distance is adjusted through the bolt and the U-shaped hole.
It can be understood that the parallel four-bar linkage is adopted, and is characterized in that the soil conductivity detection sensor is lifted or lowered, and the angle of the soil conductivity detection sensor is not changed. The advantage is simple structure, easily dismantles. The embodiment relies on this mechanism to keep leading sensor mechanism can not incline, keeps measuring angle unchangeable, ensures that the fluctuation in farmland can not disturb the measurement, improves and measures the accuracy.
It will be appreciated that the soil conductivity detection sensor is fixed in front of the tractor for forward measurements, and the implement may be implemented in the rear traction variables or may be measured separately without carrying the implement.
In a preferred embodiment, the measuring device further comprises: the protection land wheel sets up on the soil conductivity detection sensor, be used for the soil conductivity detection sensor towed in-process shock attenuation.
In a preferred embodiment, the ground protection wheel is equipped with a pressure sensor for measuring a pressure condition of the ground protection wheel during rotation of the ground protection wheel.
It can be understood that the increase of the protection land wheel can avoid that the soil conductivity detection sensor is damaged by being impacted greatly when falling down after being jacked up by the straws in the farmland, and the land wheel plays a role in shock absorption. Furthermore, a pressure sensor is provided at the ground wheel, and when a soaring ground wheel is detected from the pressure sensor signal, it can be noted that the signal at the time is abnormal, which does not participate in the conductivity analysis.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is further noted that, herein, 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 above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A soil water salt content measuring device, characterized by comprising: the device comprises a soil conductivity detection sensor, a position sensor and a controller;
the soil conductivity detection sensor comprises a plurality of groups of disks which are arranged in parallel and have different diameters, and the disks with different diameters are used for detecting the conductivity of the soil with different depths; convex patterns are arranged on the surface of the disc;
each disc is provided with an electrode, the electrodes are connected with the controller through leads, when the electrodes are electrified, an electric field is formed between the two discs, and the controller collects formed electric field information and corresponding time information;
the measuring device further includes: the support is arranged at one end, far away from soil, of the soil conductivity detection sensor, a plurality of ultrasonic sensors are placed on the support and are arranged at intervals with the disc, and the ultrasonic sensors are used for acquiring conductivity measurement depth information in the measurement process;
in the process that the measuring device is dragged by the dragging device in the soil area to be measured, the disc penetrates through the soil surface layer of the soil area to be measured by a preset penetration depth, and the electrodes arranged on the disc are electrified to form a corresponding electric field; correspondingly, the controller is used for storing the collected electric field information and the corresponding measurement depth information and time information in the dragging process of the measuring device; the controller is also used for storing the position information acquired by the position sensor and the corresponding time information;
the controller is used for converting the corresponding relation between the stored electric field information and the depth and the time into the corresponding relation between the soil conductivity and the depth and the time and storing the corresponding relation;
the controller is used for correcting the obtained soil conductivity according to a preset temperature compensation curve; the abscissa axis of the preset temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil salinity and the time according to a first preset conversion relation and storing the corresponding relation;
the controller is used for converting the corrected corresponding relation between the soil conductivity and the time into the corresponding relation between the soil water content and the time according to a second preset conversion relation and storing the corresponding relation;
the controller is used for storing the soil water content information and the position information corresponding to the same time point to obtain the soil water content information of each position point in the soil area to be detected;
the controller is used for storing the soil salinity information and the position information corresponding to the same time point to obtain the soil salinity information of each position point in the soil area to be detected;
further comprising: the protective land wheel is arranged on the soil conductivity detection sensor and is used for damping in the dragging process of the soil conductivity detection sensor; each disc is provided with a plurality of temperature sensors, and the angles of the temperature sensors arranged on different discs and the positions of the temperature sensors on different discs, which are far away from the circle center, are different; the controller is also used for storing the temperature information acquired by the temperature sensor positioned on the disc and the corresponding time information; the controller is also used for generating a first temperature compensation curve according to temperature information acquired by a temperature sensor positioned on the disc and conductivity measurement depth information acquired by the ultrasonic sensor; correspondingly, the controller is used for correcting the obtained soil conductivity according to the first temperature compensation curve; the abscissa axis of the first temperature compensation curve is the conductivity measurement depth, and the ordinate axis is the temperature compensation coefficient.
2. The measuring device of claim 1, wherein the controller is configured to modify the obtained soil conductivity according to a preset temperature compensation curve, comprising:
and the controller multiplies the soil conductivity at the corresponding depth by the temperature compensation coefficient at the corresponding depth to obtain the corrected soil conductivity.
3. The measurement device of claim 1, wherein the first predetermined transformation relationship is: and y is 0.0247x +0.2638, wherein x is the conductivity and y is the soil salinity.
4. The measurement device of claim 1, wherein the second predetermined transformation relationship is: and y is 2.4736x +3.4979, wherein x is the conductivity and y is the soil moisture content.
5. The measuring device as claimed in claim 1, wherein the dragging device is connected with the soil conductivity detection sensor through a parallel four-bar linkage.
6. A measuring device according to claim 5, characterized in that the traction device is a tractor, and correspondingly the parallel four-bar linkage is fixed in the position of the weight iron of the tractor.
7. The apparatus of claim 1, wherein the ground protection wheel is equipped with a pressure sensor for measuring a pressure condition of the ground protection wheel during rotation of the ground protection wheel.
8. The measurement device of claim 1, wherein the controller is further configured to normalize the electric field signal detected by the soil conductivity detection sensor.
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| US11067560B2 (en) * | 2015-09-09 | 2021-07-20 | Veris Technologies, Inc. | System for measuring multiple soil properties using narrow profile sensor configuration |
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