CN112146724B - Water body liquid level height and fertility detection equipment and detection method thereof - Google Patents
Water body liquid level height and fertility detection equipment and detection method thereof Download PDFInfo
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- CN112146724B CN112146724B CN202010937869.4A CN202010937869A CN112146724B CN 112146724 B CN112146724 B CN 112146724B CN 202010937869 A CN202010937869 A CN 202010937869A CN 112146724 B CN112146724 B CN 112146724B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 230000035558 fertility Effects 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 142
- 239000010935 stainless steel Substances 0.000 claims abstract description 142
- 238000005259 measurement Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 26
- 238000002360 preparation method Methods 0.000 claims description 17
- 230000002262 irrigation Effects 0.000 abstract description 8
- 238000003973 irrigation Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2961—Acoustic waves for discrete levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/245—Earth materials for agricultural purposes
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- Medicinal Chemistry (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Health & Medical Sciences (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The application discloses water liquid level height and fertility check out test set and detection method thereof adopts the mode of stainless steel nail array, judges the water level between which two nails through measuring the conductivity between the metal nails to obtain the height of surface of water. When two stainless steel nails are connected by water, the conductivity between the two nails is increased, and when the water level is reduced and two adjacent stainless steel nails are not connected by water, the conductivity between the two nails is small; and the conductivity can be obtained by measuring the voltage value between two metal nails; the water level measurement accuracy of the scheme only depends on H 0 And H Z The precision of the two parameters can be controlled within +/-0.1 mm according to the precision of the current PCB production process, so that the control requirement of the current agricultural irrigation on the water level is completely met; the two stainless steel nails at the bottom are used as the conductivity of water, namely the conductivity EC of the water body 0 And the result of the value is also used as a judging value for the water level height reaching the minimum measurement height, and the value is two-purpose.
Description
Technical Field
The application relates to the technical field of agricultural irrigation, in particular to water body liquid level height and fertility detection equipment and a detection method thereof.
Background
In the face of the fact that water resources are increasingly in shortage, the importance of reasonable irrigation is more remarkable, the current farmland water level control is mainly realized by manually observing and then manually controlling the valve to switch the water supply valve and the water discharge valve, the workload is large, the control precision is poor, and the water supply valve and the water discharge valve are a main cause of agricultural water waste, so that automatic accurate irrigation is very important.
The principle of the water level detection device used in the current automatic irrigation system mainly adopts an ultrasonic sensor, and the sensor has two main defects: firstly, the requirement on the installation environment is too high, and the situation that the space in a conical area of the probe position peak of the ultrasonic sensor is completely forbidden and can not be shielded is ensured, so that the ultrasonic sensor is not suitable for a complex farmland environment; secondly, the measurement accuracy is not only affected by the ambient temperature, but also gradually becomes worse along with the use time.
Disclosure of Invention
The main object of the present application is to provide a device and a method for detecting the height and fertility of a water body, so as to solve the current problem.
In order to achieve the above object, the present application provides the following techniques:
the first aspect of the invention provides a water body liquid level height and fertility detection device, which comprises a vertically arranged PCB board, wherein the PCB board is provided with a conductivity EC for testing comprehensive fertility index of a water body 0 And stainless steel reference steel nails for judging the water level; stainless steel measuring steel nails are also arranged on the PCB above the stainless steel reference steel nails at equal intervals in a staggered way; the PCB above the stainless steel measuring steel nails is also provided with a voltage value for measuring output level and a conversion conductivity EC 0 The processor M1 is electrically connected with the stainless steel reference steel nail and the stainless steel measuring steel nail respectively.
Further, the stainless steel reference steel nail comprises a first stainless steel nail TP 01 And a second stainless steel nail TP 02 The first stainless steel nail TP 01 And the second stainless steel nail TP 02 At the same level.
Further, in the vertical direction, the first stainless steel nail TP 01 And the second stainless steel nail TP 02 The heights of the printed circuit boards and the bottom edges of the PCB are equal to each other and are H 0 。
Further, in the vertical direction, the spacing between the stainless steel measuring steel nails is standard spacing, and is H Z 。
The second aspect of the present invention provides a method for detecting the water level and the fertility by using the above-mentioned device for detecting the water level and the fertility, which is characterized by comprising the following steps:
s1, measuring conductivity EC of water 0 ；
S2, conductivity EC 0 And measuring the margin value EC of noise MIN Comparing;
s3, according to conductivity EC 0 And measuring the margin value EC of noise MIN And the water level is determined by comparing the results of the comparison.
Further, the conductivity EC of the measured water 0 The method specifically comprises the following steps:
control processor M1 to first stainless steel nail TP 01 Outputting a high level;
measuring the first stainless steel pin TP with high level 01 And the second stainless steel nail TP 02 Voltage values in between;
converting the voltage value to obtain the first stainless steel nail TP 01 And the second stainless steel nail TP 02 Conductivity between EC 0 。
Further, in step S3, if it is the conductivity EC 0 Exceeding the tolerance value EC of the measurement noise MIN Indicating that the water level has reached the first stainless steel nail TP 01 And the second stainless steel nail TP 02 At a height H of (2) 0 At this time, entering a specific quantitative measurement of the water level;
the water level specific quantitative determination specifically comprises the following steps:
a. setting a test point, and marking the test point as X;
b. the stainless steel measurement steel nail marked on the top of the PCB is N, and the maximum measurement range H of the PCB is expressed as: h=h 0 +N×H Z ；
If X is>N, the water level height reaches the maximum measuring range H of the PCB Water and its preparation method The method comprises the following steps: h Water and its preparation method ＝H 0 +N×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, the device exits from the sleep state, and goes to step S1 to start the water level H of the next period Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
Further, in step b, further comprising:
c. if X is<Or = N, then control the processor M1 to the X-th stainless steel pin TP X Outputting a high level;
measuring the X-th stainless steel nail TP by high level X And the second stainless steel nail TP 02 Voltage values in between;
the X-th stainless steel nail TP is converted through the voltage value X And the second stainless steel nail TP 02 Conductivity between EC X 。
Further, in step c, further comprising:
d. if it is EC X <EC MIN Indicating that the water level does not reach TP X At the height of the water level H Water and its preparation method ＝H 0 +(X-1)×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, the device exits from the sleep state, and goes to step S1 to start the water level H of the next period Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
Further, in step c, further comprising:
e. if it is EC X ≧EC MIN Indicating that the water level has reached TP X At the height of the water level H Water and its preparation method ＝H 0 +X×H Z ，X＝X+1；
Thereafter, steps b, c, d and e are repeated.
Compared with the prior art, the application can bring the following technical effects:
1. aiming at the complex environment of farmlands, the invention adopts a stainless steel nail array mode, and the conductivity between metal nails is measured by the MCU to judge which two nails the water level is between, thereby obtaining the height of the water surface. When two stainless steel nails are connected by water, the conductivity between the two nails is increased, and when the water level is reduced and two adjacent stainless steel nails are not connected by water, the conductivity between the two nails is small; the conductivity can be obtained by measuring the voltage value between two metal nails through the MCU;
compared with the prior art, the method has the advantages of simple installation, strong environmental adaptability, high accuracy, good repeatability, no influence of service life and the like;
2. the water level measurement accuracy of the scheme only depends on H 0 And H Z The precision of the two parameters can be controlled within +/-0.1 mm according to the precision of the current PCB production process, so that the control requirement of the current agricultural irrigation on the water level is completely met;
3. the advantages of this scheme: the measurement precision and accuracy are not affected by the ambient temperature and humidity; the long-term stability is good, and the measurement precision and accuracy cannot be deteriorated along with the service life; the structure is simple, and the installation is convenient; bottom two stainless steel nails TP 01 And TP 02 In the use of the water as the conductivity of water, namely the conductivity EC of the water body 0 The result of the value is used as the judgment value that the water level height reaches the minimum measurement height, and the mode of one value is two-purpose.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the detection apparatus of the present invention;
FIG. 2 is a schematic flow chart of the detection method of the present invention;
FIG. 3 is a specific workflow diagram of the detection method of the present invention.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
H, H of the invention 0 、N、H Z 、X、T 0 The technical definition represented by the equal symbols is simply a formula symbol, and the numerical value is selected according to the real stateThe setting of the space is not limited.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The invention adopts a stainless steel nail array mode, and the conductivity between the metal nails is measured by the MCU to judge which two nails the water level is between, thereby obtaining the height of the water surface. When two stainless steel nails are connected by water, the conductivity between the two nails is increased, and when the water level is reduced and two adjacent stainless steel nails are not connected by water, the conductivity between the two nails is small; and the conductivity can be obtained by measuring the voltage value between the two metal nails through the MCU.
As shown in figure 1, the first aspect of the invention is to provide a water body liquid level and fertility detection device, comprising a vertically arranged PCB board, wherein the PCB board is provided with a conductivity EC for testing the comprehensive fertility index of the water body 0 And stainless steel reference steel nails for judging the water level; stainless steel measuring steel nails are also arranged on the PCB above the stainless steel reference steel nails at equal intervals in a staggered way; the PCB above the stainless steel measuring steel nails is also provided with a voltage value for measuring output level and a conversion conductivity EC 0 The processor M1 is electrically connected with the stainless steel reference steel nail and the stainless steel measuring steel nail respectively.
EC value: the concentration of the soluble salt in the solution is also used to represent the total fertility of the liquid, expressed in mS/cm.
On a PCB, there are N+2 stainless steel nails, namely the stainless steel measuring steel nail, wherein the two steel nails TP at the bottom 01 And TP 02 At the same level for measuring the conductivity of water, and at a vertical distance H from the bottom edge of the PCB 0 ；
Steel nail TP 02 、TP 1 、TP 2 、…、TP N-1 、TP N Are respectively in vertical direction with the previous nailTo maintain a standard distance H Z . Therefore, the total measuring range of the sensor is:
H＝H 0 +N×H Z 。
according to the technical scheme, the method can be realized:
stainless steel nails which are arranged at equal intervals in the vertical direction of the PCB are in an appearance form;
stainless steel nails which are arranged at equal intervals in the vertical direction of the PCB are utilized, and the formula H=H is adopted 0 +N×H Z A principle of measuring the water level;
bottom two stainless steel nails TP 01 And TP 02 In the use of the water as the conductivity of water, namely the conductivity EC of the water body 0 The result of the value is used as the judgment value that the water level height reaches the minimum measurement height, and the mode of one value is two-purpose.
Further, the stainless steel reference steel nail comprises a first stainless steel nail TP 01 And a second stainless steel nail TP 02 The first stainless steel nail TP 01 And the second stainless steel nail TP 02 At the same level.
The bottom of the detection device of the invention is provided with two stainless steel nails TP 01 And TP 02 Respectively are first stainless steel nails TP 01 And a second stainless steel nail TP 02 The two nails are at the same height and are used for measuring the conductivity EC of water 0 As a comprehensive fertility index of the water body.
The measuring precision and accuracy of the invention are not affected by the ambient temperature and humidity; the long-term stability is good, and the measurement precision and accuracy cannot be deteriorated along with the service life; the structure is simple, and the installation is convenient; bottom two stainless steel nails TP 01 And TP 02 In the use of the water as the conductivity of water, namely the conductivity EC of the water body 0 The result of the value is used as the judgment value that the water level height reaches the minimum measurement height, and the mode of one value is two-purpose.
Further, in the vertical direction, the first stainless steel nail TP 01 And the second stainless steel nail TP 02 The heights of the printed circuit boards and the bottom edges of the PCB are equal to each other and are H 0 。
Further, in the vertical direction, the spacing between the stainless steel measuring steel nails is standard spacing, and is H Z 。
The water level measurement accuracy of the invention only depends on H 0 And H Z The precision of the two parameters can be controlled within +/-0.1 mm according to the precision of the current PCB production process, and the control requirement of the current agricultural irrigation on the water level is completely met.
As shown in figure 2 of the drawings,
the second aspect of the present invention provides a method for detecting the water level and the fertility by using the above-mentioned device for detecting the water level and the fertility, which is characterized by comprising the following steps:
s1, measuring conductivity EC of water 0 ；
S2, conductivity EC 0 And measuring the margin value EC of noise MIN Comparing;
s3, according to conductivity EC 0 And measuring the margin value EC of noise MIN And the water level is determined by comparing the results of the comparison.
As shown in figure 3 of the drawings,
further, the conductivity EC of the measured water 0 The method specifically comprises the following steps:
control the processor M1 to the first stainless steel nail TP 01 Outputting a high level;
measuring the first stainless steel pin TP with high level 01 And the second stainless steel nail TP 02 Voltage values in between;
converting the voltage value to obtain the first stainless steel nail TP 01 And the second stainless steel nail TP 02 Conductivity between EC 0 。
The device is powered on, the processor M1 first measures the bottom 2 nails of the first stainless steel nail TP 01 And the second stainless steel nail TP 02 Conductivity between EC 0 . The specific process is that the processor M1 transmits to TP 01 Outputs a high level, and then the processor M1 measures the first stainless steel pin TP 01 And the second stainless steel nail TP 02 Voltage value between the two through voltage value exchangeTP was calculated 01 And TP 02 Conductivity between EC 0 。
Further, in step S3, if it is the conductivity EC 0 Exceeding the tolerance value EC of the measurement noise MIN Indicating that the water level has reached the first stainless steel nail TP 01 And the second stainless steel nail TP 02 At a height H of (2) 0 At this time, entering a specific quantitative measurement of the water level;
the water level specific quantitative determination specifically comprises the following steps:
a. setting a test point, and marking the test point as X;
x is the working height of the test point, and the water level height is determined by testing the working height of the test point at the height position of the test point on the PCB. As shown in figure 1, the stainless steel measuring steel nail at the top of the PCB is TP N X points can be respectively positioned on stainless steel measuring steel nails TP N Is set according to the test selection.
b. The stainless steel measurement steel nail marked on the top of the PCB is N, and the maximum measurement range H of the PCB is expressed as: h=h 0 +N×H Z ；
If X is>N, the water level height reaches the maximum measuring range H of the PCB Water and its preparation method The method comprises the following steps: h Water and its preparation method ＝H 0 +N×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, the device exits from the sleep state, and goes to step S1 to start the water level H of the next period Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
Example 2
The invention adopts a stainless steel nail array mode, and the conductivity between the metal nails is measured by the MCU to judge which two nails the water level is between, thereby obtaining the height of the water surface. When two stainless steel nails are connected by water, the conductivity between the two nails is increased, and when the water level is reduced and two adjacent stainless steel nails are not connected by water, the conductivity between the two nails is small; and the conductivity can be obtained by measuring the voltage value between the two metal nails through the MCU.
As shown in figure 1, the first aspect of the invention is to provide a water body liquid level and fertility detection device, comprising a vertically arranged PCB board, wherein the PCB board is provided with a conductivity EC for testing the comprehensive fertility index of the water body 0 And stainless steel reference steel nails for judging the water level; stainless steel measuring steel nails are also arranged on the PCB above the stainless steel reference steel nails at equal intervals in a staggered way; the PCB above the stainless steel measuring steel nails is also provided with a voltage value for measuring output level and a conversion conductivity EC 0 The processor M1 is electrically connected with the stainless steel reference steel nail and the stainless steel measuring steel nail respectively.
EC value: the concentration of the soluble salt in the solution is also used to represent the total fertility of the liquid, expressed in mS/cm.
On a PCB, there are N+2 stainless steel nails, namely the stainless steel measuring steel nail, wherein the two steel nails TP at the bottom 01 And TP 02 At the same level for measuring the conductivity of water, and at a vertical distance H from the bottom edge of the PCB 0 ；
Steel nail TP 02 、TP 1 、TP 2 、…、TP N-1 、TP N Respectively keep a standard distance H with the previous nail in the vertical direction Z . Therefore, the total measuring range of the sensor is:
H＝H 0 +N×H Z 。
according to the technical scheme, the method can be realized:
stainless steel nails which are arranged at equal intervals in the vertical direction of the PCB are in an appearance form;
stainless steel nails which are arranged at equal intervals in the vertical direction of the PCB are utilized, and the formula H=H is adopted 0 +N×H Z A principle of measuring the water level;
bottom two stainless steel nails TP 01 And TP 02 In the use of the water as the conductivity of water, namely the conductivity EC of the water body 0 As a result of the value(s),and the method also serves as a judgment value for the water level height reaching the minimum measurement height, and the mode of one value and two purposes is adopted.
Further, the stainless steel reference steel nail comprises a first stainless steel nail TP 01 And a second stainless steel nail TP 02 The first stainless steel nail TP 01 And the second stainless steel nail TP 02 At the same level.
The bottom of the detection device of the invention is provided with two stainless steel nails TP 01 And TP 02 Respectively are first stainless steel nails TP 01 And a second stainless steel nail TP 02 The two nails are at the same height and are used for measuring the conductivity EC of water 0 As a comprehensive fertility index of the water body.
The measuring precision and accuracy of the invention are not affected by the ambient temperature and humidity; the long-term stability is good, and the measurement precision and accuracy cannot be deteriorated along with the service life; the structure is simple, and the installation is convenient; bottom two stainless steel nails TP 01 And TP 02 In the use of the water as the conductivity of water, namely the conductivity EC of the water body 0 The result of the value is used as the judgment value that the water level height reaches the minimum measurement height, and the mode of one value is two-purpose.
Further, in the vertical direction, the first stainless steel nail TP 01 And the second stainless steel nail TP 02 The heights of the printed circuit boards and the bottom edges of the PCB are equal to each other and are H 0 。
Further, in the vertical direction, the spacing between the stainless steel measuring steel nails is standard spacing, and is H Z 。
The water level measurement accuracy of the invention only depends on H 0 And H Z The precision of the two parameters can be controlled within +/-0.1 mm according to the precision of the current PCB production process, and the control requirement of the current agricultural irrigation on the water level is completely met.
As shown in fig. 2 and 3, a method for detecting the liquid level and fertility of a water body comprises the following steps:
s1, measuring conductivity EC of water 0 ；
S2, judging the conductivity EC 0 Whether or not to exceedMeasuring tolerance value EC of noise MIN ；
S3, if the conductivity EC is 0 Not exceeding the tolerance value EC of the measurement noise MIN Indicating that the water level does not reach the first stainless steel nail TP 01 And the second stainless steel nail TP 02 At a height H of (2) 0 。
Further, the conductivity EC of the measured water 0 The method specifically comprises the following steps:
control the processor M1 to the first stainless steel nail TP 01 Outputting a high level;
measuring the first stainless steel pin TP with high level 01 And the second stainless steel nail TP 02 Voltage values in between;
converting the voltage value to obtain the first stainless steel nail TP 01 And the second stainless steel nail TP 02 Conductivity between EC 0 。
Further, in step S3, if it is the conductivity EC 0 Exceeding the tolerance value EC of the measurement noise MIN Indicating that the water level has reached the first stainless steel nail TP 01 And the second stainless steel nail TP 02 At a height H of (2) 0 At this time, entering a specific quantitative measurement of the water level;
the water level specific quantitative determination specifically comprises the following steps:
a. setting a test point, and marking the test point as X;
b. the stainless steel measurement steel nail marked on the top of the PCB is N, and the maximum measurement range H of the PCB is expressed as: h=h 0 +N×H Z ；
Further, in step b, further comprising:
c. if X is<Or = N, then control the processor M1 to the X-th stainless steel pin TP X Outputting a high level;
measuring the X-th stainless steel nail TP by high level X And the second stainless steel nail TP 02 Voltage values in between;
the X-th stainless steel nail TP is converted through the voltage value X And the second stainless steel nail TP 02 Conductivity between EC X 。
Further, in step c, further comprising:
d. if it is EC X <EC MIN Indicating that the water level does not reach TP X At the height of the water level H Water and its preparation method ＝H 0 +(X-1)×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, the device exits from the sleep state, and goes to step S1 to start the water level H of the next period Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
Further, in step c, further comprising:
e. if it is EC X ≧EC MIN Indicating that the water level has reached TP X At the height of the water level H Water and its preparation method ＝H 0 +X×H Z ，X＝X+1；
Thereafter, steps b, c, d and e are repeated.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (5)
1. A water body liquid level and fertility detection method implemented by applying water body liquid level and fertility detection equipment, which is characterized in that,
the water body liquid level height and fertility detection equipment comprises a vertically arranged PCB board, wherein the PCB board is provided with an electric conductivity EC for testing the comprehensive fertility index of the water body 0 And stainless steel reference steel nails for judging the water level; stainless steel measuring steel nails are also arranged on the PCB above the stainless steel reference steel nails at equal intervals in a staggered way; is positioned on the PCB above the stainless steel measuring steel nailsAlso provided with measuring voltage value for output level and converting conductivity EC 0 The processor M1 is electrically connected with the stainless steel reference steel nail and the stainless steel measuring steel nail respectively; the stainless steel reference steel nail comprises a first stainless steel nail TP 01 And a second stainless steel nail TP 02 In the vertical direction, the first stainless steel nail TP 01 And the second stainless steel nail TP 02 The heights of the printed circuit boards and the bottom edges of the PCB are equal to each other and are H 0 In the vertical direction, the spacing between the stainless steel measuring steel nails is standard spacing and is H Z ；
The method for detecting the water body liquid level height and the fertility comprises the following steps:
s1, measuring the voltage between stainless steel reference steel nails, and converting the voltage into the conductivity EC of water 0 ；
S2, conductivity EC 0 And measuring the margin value EC of noise MIN Comparing;
s3, if the conductivity EC is 0 Exceeding the tolerance value EC of the measurement noise MIN Indicating that the water level has reached the first stainless steel nail TP 01 And the second stainless steel nail TP 02 At a height H of (2) 0 At this time, entering a specific quantitative measurement of the water level;
the water level specific quantitative determination specifically comprises the following steps:
a. setting a test point, and marking the test point as X;
b. the stainless steel measurement steel nail marked on the top of the PCB is N, and the maximum measurement range H of the PCB is expressed as: h=h 0 +N×H Z ；
If X is>N, the water level height reaches the maximum measuring range H of the PCB Water and its preparation method The method comprises the following steps: h Water and its preparation method ＝H 0 +N×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, the device exits from the sleep state, and goes to step S1 to start the water level of the next period to be highDegree H Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
2. A method for water level and fertility detection according to claim 1, wherein said measuring water conductivity EC 0 The method specifically comprises the following steps:
control processor M1 to first stainless steel nail TP 01 Outputting a high level;
measuring the first stainless steel pin TP with high level 01 And the second stainless steel nail TP 02 Voltage values in between;
converting the voltage value to obtain the first stainless steel nail TP 01 And the second stainless steel nail TP 02 Conductivity between EC 0 。
3. The method for detecting the water level and fertility of a body of water of claim 1, wherein in step b, further comprising:
c. if X is<Or = N, then control the processor M1 to the X-th stainless steel pin TP X Outputting a high level;
measuring the X-th stainless steel nail TP by high level X And the second stainless steel nail TP 02 Voltage values in between;
the X-th stainless steel nail TP is converted through the voltage value X And the second stainless steel nail TP 02 Conductivity between EC X 。
4. A method of water level and fertility detection according to claim 3, further comprising, in step c:
d. if it is EC X <EC MIN Indicating that the water level does not reach TP X At the height of the water level H Water and its preparation method ＝H 0 +(X-1)×H Z ；
At this time, the processor M1 sets the duration to T 0 Is in a low power consumption sleep state;
at T 0 After the countdown is finished, it exits the sleep stateTurning to step S1, the water level H of the next cycle is started Water and its preparation method And conductivity of water EC 0 Is a measurement of (a).
5. A method of water level and fertility detection according to claim 3, further comprising, in step c:
e. if it is EC X ≧EC MIN Indicating that the water level has reached TP X At the height of the water level
Hwater=h 0 +X×H Z ，X＝X+1；
Thereafter, steps b, c, d and e are repeated.
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