JP6024355B2 - Moisture content correction device, moisture content correction method and program - Google Patents

Description

  The present invention relates to a moisture content correction apparatus, a moisture content correction method, and a program.

  Conventionally, it has a plurality of electrodes that can be inserted into the soil for plant cultivation, and the moisture content of the soil is measured by measuring the electrical resistance value between these electrodes, and the content is below a set limit level. When it becomes, the moisture content monitoring apparatus which issues an alarm is known (for example, refer to patent documents 1).

Japanese Patent No. 2608679

  However, the moisture sensor as described in Patent Document 1 is affected by the temperature of the soil and has low measurement accuracy and reliability.

  The subject of this invention is improving the precision and reliability of the moisture content information of soil.

In order to achieve the above object, a water content correction apparatus according to claim 1 is:
An acquisition unit for acquiring soil moisture content information;
Based on the moisture amount information acquired by the acquisition unit, a water injection determination unit that determines whether water has been injected into the soil;
An increase determination unit that determines whether or not the moisture content information acquired by the acquisition unit is increasing;
On the basis of the water injection determination unit and the rise judgment unit of the judgment result, Bei example and a correction unit for correcting the moisture content information,
The correction unit determines that the water injection determination unit determines that water injection has not been performed, and the increase determination unit determines that the water content information has increased, immediately before the value of the water content information increases. It correct | amends so that it may become the same value as the moisture content information.

  ADVANTAGE OF THE INVENTION According to this invention, the precision and reliability of the moisture content information of soil can be improved.

It is a block diagram which shows the functional structure of the moisture sensor in this embodiment. It is a figure which shows the structural example of the sensor part of FIG. It is a graph which shows a time-dependent transition of sensor output value [%] and moisture content [g] when a bowl is left to stand in the sunlight where the temperature change is intense. It is a graph which shows temporal transition of the sensor output value [%] and the temperature [° C.] of the outside air during the experiment of FIG. It is a figure which shows a time-dependent transition of sensor output value [%] and room temperature [° C] when a bowl is left at room temperature where the temperature change is not so large. It is a graph which shows a time-dependent transition of sensor output value [%] and moisture content [g] when a pot is left to stand in a thermostat set to 50 [° C.]. It is a graph which shows the time-dependent change of moisture content of FIG. 3, and difference (DELTA) V (t) of a sensor output value. It is the graph which expanded the rising part of the sensor output value when water injection is not performed, and the graph which shows the corrected output value at this time. It is a flowchart which shows the correction process performed by the control part of FIG. It is a graph which shows the relationship between the soil temperature [degreeC] and sensor output value [%] about two pots which put the soil from which moisture content differs. It is a figure which shows the structural example when a server is used as the moisture content correction apparatus.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the illustrated example.

<Configuration of moisture sensor 1>
First, the structure of the moisture sensor 1 including the moisture amount correction apparatus according to the present invention will be described.
FIG. 1 is a block diagram illustrating a functional configuration example of the moisture sensor 1. As shown in FIG. 1, the moisture sensor 1 includes a control unit 10, a sensor unit 11, an operation unit 12, a display unit 13, a storage unit 14, a communication unit 15, a time measuring unit 16, and the like. Connected by.

  Although not shown, the control unit 10 includes a CPU (Central Processing Unit) and a RAM (Random Access Memory). The CPU of the control unit 10 reads out the program stored in the storage unit 14, develops it in the work area of the RAM, and executes various processes including correction processing described later according to the expanded program. The control unit 10 functions as a water injection determination unit, a rise determination unit, and a correction unit by executing correction processing.

  The sensor part 11 functions as an acquisition part, measures the moisture content of the soil S in which the plant was planted, acquires moisture content information, and outputs this moisture content information to the control part 10 as a sensor output value. .

FIG. 2A shows a configuration example of the sensor unit 11. FIG. 2B shows a circuit diagram for measuring the moisture content of the soil S in the sensor unit 11. In addition, although the plant is planted in the soil S, the illustration is abbreviate | omitted in Fig.2 (a).
2A, the sensor unit 11 includes an electrode 11a, an electrode 11b, and a detection circuit 11c, and measures the moisture content of the soil S by inserting the electrode 11a and the electrode 11b into the soil S.
The detection circuit 11c incorporates a power supply V0, an electric resistance R, and a voltmeter V1 shown in FIG. The power source V0 is a power source for applying a voltage V0 [V] to the electrode 11a. The electric resistance R is an electric resistance of an electric resistance value R [Ω] (constant) incorporated in order to measure the moisture content of the soil S between the electrodes 11a and 11b. The voltmeter V1 is a voltmeter for measuring a voltage drop V1 [V] across the electric resistance R. In addition, Rs in FIG.2 (b) represents the electrical resistance value [(ohm)) in the soil S between the electrodes 11a and 11b.

In the sensor unit 11 of the present embodiment, the moisture content of the soil S is defined by V1 / V0 × 100 [%].
From FIG. 2B, V0 can be expressed by the following (formula 1). When this is transformed into an equation, V1 / V0 is expressed by (Equation 2).

  Here, when water is poured into the soil S, and moisture is contained in the soil S, conduction between the electrodes 11a and 11b becomes possible through the soil S containing moisture, and the electric resistance value Rs decreases (Rs → 0). From (Formula 2), the water content V1 / V0 × 100 [%] of the soil S approaches 100 [%] as Rs approaches 0. Conversely, when the soil S between the electrodes 11a and 11b is dried, the electrical resistance value Rs increases (Rs → ∞). From (Formula 2), the water content V1 / V0 × 100 [%] of the soil S approaches 0 [%] as Rs approaches ∞. That is, as V1 / V0 × 100 [%] is closer to 100, the moisture content of the soil S is larger, and as it is closer to 0, the moisture content of the soil S is smaller.

  Based on the control from the control unit 10, the detection circuit 11c of the sensor unit 11 applies the voltage V0 [V] to the electrode 11a from the power source V0, and the voltage drop V1 [V] which is a measurement value by the voltmeter V1. Is obtained, and the moisture content V1 / V0 × 100 [%] is calculated and output to the control unit 10.

  The operation unit 12 has various function keys, cursor keys, and the like, receives key input by the user, and outputs the operation information to the control unit 10.

  The display unit 13 is configured by an LCD (Liquid Crystal Display) or the like, and performs various displays according to a display control signal from the control unit 10.

  The storage unit 14 is configured by a nonvolatile semiconductor memory or the like. The storage unit 14 stores system programs and various processing programs executed by the control unit 10, data necessary for executing these programs, and the like. The program is stored in the form of computer readable program code. The control unit 10 sequentially executes operations according to the program code.

  The communication unit 15 is configured by, for example, a wireless local area network (LAN) module, and is connected to an external device for data transmission / reception.

  The timer unit 16 is composed of an RTC (Real Time Clock) or the like, measures the current date and time, and outputs it to the control unit 10.

<Influence of temperature change on sensor output value>
Here, in general, the moisture contained in the soil decreases as it evaporates into the atmosphere or is sucked out by plants, so the moisture in the soil decreases unless “water injection” is performed. However, it has been experimentally confirmed that the sensor output value from the sensor unit 11 rises despite no water injection. The experimental results are shown in FIGS. In addition, in the experiment shown in FIGS. 3-6, the kind of the soil put into the pot, the volume of a pot, and the shape are using the same thing.

  FIG. 3 shows the change over time of the moisture in the soil in the pot when the pot is left in the sun, which is exposed to direct sunlight where the temperature changes drastically. In FIG. 3, the solid line indicates the sensor output value when the soil moisture amount [%] is measured by the sensor unit 11. A dotted line shows the measurement result of the moisture content [g] of soil. The water content is a value obtained by subtracting the mass of the pot when the soil is in a dry state from the mass of the pot containing the soil. The measurement period is from February 10 to March 30. Moreover, water injection is not performed until March 14 (at the time of enclosing with the dashed-dotted ellipse b).

  As shown in FIG. 3, the water content [g] decreases from the time when the water injection from February 10 to March 14 is performed. However, in this period, it can be confirmed that the sensor output value increases in a spike shape everywhere, such as a portion surrounded by a dashed ellipse a.

  FIG. 4 shows changes over time of the sensor output value [%] and the outside air temperature [° C.] during the experiment of FIG. As shown in FIG. 4, when the temperature rises, the sensor output value also rises despite the fact that water injection is not performed. That is, it can be confirmed that the sensor output value changes in accordance with the change in temperature.

FIG. 5 shows changes over time in sensor output value [%] and room temperature [° C.] when the bowl is left at room temperature where the temperature change is not so large. The measurement period of FIG. 5 is from February 15 to April 18. Water injection is performed once on February 15 and five times from March 7 to March 16 (at the time surrounded by a dashed-dotted circle in FIG. 5).
In FIG. 5, the temperature change is very small compared to FIG. 4, and the sensor output value at this time does not show a spike-like change as seen in FIG. Only changes are seen.

  FIG. 6 shows changes over time of the sensor output value [%] and the water content [g] when the pot is left in a thermostat set to a constant 50 [° C.]. As shown in FIG. 6, under a constant temperature condition, the sensor output value does not increase except at the time of water injection (when the water content increases) even at a high temperature of 50 [° C.] (except for noise). .

  In addition, when a predetermined maximum amount of water is injected, the sensor output value is 86 to 87 under the high temperature (50 [° C.]) condition shown in FIG. 6, whereas the room temperature shown in FIG. It was about 81 under these conditions.

From the above, it can be said that the sensor output value is affected by the temperature, and has a characteristic that it decreases at a low temperature and increases at a high temperature.
However, an increase in the sensor output value despite the absence of water injection is not preferable because it is not reliable. For example, the sensor output value is compared with a plurality of threshold values to determine the moisture level of the soil relative to the plant (for example, low (dry), good, slightly high, high (risk of root rot), etc.) When notifying the user for support, if the sensor output value rises due to the influence of temperature near the threshold value even though water is not being poured, the judgment level will rise, and an accurate judgment result will be displayed. Can't tell user.
Therefore, in the moisture sensor 1, the influence of the temperature on the sensor output value is removed, and correction processing is performed so that the sensor output value does not increase except when it is recognized that “water has been injected”.

<Correction process>
Hereinafter, the correction process will be described.
In the following description, a sensor output value at a certain time t is defined as V (t), and a corrected output value obtained by correcting V (t) is defined as Vout (t). The difference between the sensor output value and the sensor output value measured immediately before is defined as ΔV (t). ΔV (t) = V (t) −V (t−1).

First, an outline of an algorithm for correction processing will be described.
FIG. 7 shows changes over time in the moisture content and the difference ΔV (t) between the sensor output values. FIG. 7 is created using the water content and sensor output value of the experimental result of FIG.
As shown in FIG. 7, at the time of water injection, that is, when the water content is increased, ΔV (t) is greatly increased (for example, 10 or more), but other than that, a very small value (for example, 5 or less) can be confirmed. In other experiments, it has been confirmed that ΔV (t) significantly increases (for example, 10 or more) during water injection.

  Therefore, in the correction process of the present embodiment, when V (t) increases, the control unit 10 determines ΔV (t) in order to determine whether the increase is due to water injection or due to temperature. Is compared with a predetermined threshold value Vth (for example, 10), and when ΔV (t)> Vth, it is determined that water injection has been performed. When it is determined that ΔV (t)> Vth is not satisfied, that is, water injection is not performed, correction due to the influence of temperature is performed.

FIG. 8 shows a graph in which the rising portion of the sensor output value when water injection is not performed is enlarged, and the sensor output value after correction processing (referred to as corrected output value) at this time.
In FIG. 8, t5 to tn is a period until the sensor output value rises and returns to the original value as the temperature rises. Here, as described above, the amount of water in the soil does not increase unless water injection is performed. Therefore, in the correction processing of the present embodiment, when the sensor output value is rising despite the fact that water has not been injected, as shown between t5 and tn shown in FIG. During the period until returning to, correction is performed so that the corrected output value becomes the sensor output value immediately before the increase. In the case of FIG. 8, correction is performed so that the corrected output value becomes the sensor output value V (t5) between t5 and tn.

The correction process by the above algorithm is realized by cooperation between the control unit 10 and a program stored in the storage unit 14. FIG. 9 is a flowchart showing the flow of the correction process. Hereinafter, the flow of the correction process will be described with reference to FIG.
The RAM of the control unit 10 stores the previous sensor output value V (t−1) and its corrected output value Vout (t−1), and the current sensor output value V (t) and its corrected output. A storage area for storing the value Vout (t) is provided.

  First, the control unit 10 acquires the sensor output value V (t) from the sensor unit 11 and stores it in the storage area of V (t) in the RAM (step S1).

  Next, it is determined whether or not a value of V (t−1) exists in the RAM storage area (step S2). For example, there is no value of V (t−1) at the first measurement.

  When it is determined that the value of V (t−1) does not exist (step S2; NO), the control unit 10 stores the value of V (t) in Vout (t) (step S8), and Vout (t) Is output (step S9). That is, when it is determined that the value of V (t−1) does not exist, the control unit 10 outputs the same value as the sensor output value as the corrected output value. The output destination of the corrected output value is, for example, the display unit 13 or the above-described determination process (details will be described later) for determining the moisture content level (the same applies hereinafter).

  When it is determined that V (t−1) exists (step S2; YES), the control unit 10 calculates ΔV (t) = V (t) −V (t−1) (step S3), and ΔV ( It is determined whether or not t)> Vth (step S4).

  When it is determined that ΔV (t)> Vth, that is, when it is determined that water injection has been performed (step S4; YES), the control unit 10 stores the value of V (t) in Vout (t) ( Step S8), Vout (t) is output (Step S9). That is, when it is determined that water injection has been performed, the control unit 10 outputs the same value as the sensor output value as a corrected output value (substantially no correction is performed).

When it is determined that ΔV (t)> Vth is not satisfied, that is, when it is determined that water injection is not performed (step S4; NO), the control unit 10 determines whether ΔV (t)> 0, that is, Then, it is determined whether or not the sensor output value has increased compared to the previous time (step S5).
When it is determined that ΔV (t)> 0, that is, the sensor output value has increased compared to the previous time (step S5; YES), the control unit 10 sets Vout (t−1) to Vout (t). Is stored (step S7), and Vout (t) is output (step S9). That is, when the sensor output value rises when water injection is not performed, the same corrected output value as the previous corrected output value is output.

When it is determined that ΔV (t)> 0 is not satisfied, that is, the sensor output value is the same or decreased compared to the previous time (step S5; NO), the control unit 10 determines that V (t) <Vout (t− 1), that is, it is determined whether or not the current sensor output value has decreased compared to the previous corrected output value (step S6).
When it is determined that V (t) <Vout (t−1), that is, the current sensor output value is decreased compared to the previous corrected output value (step S6; YES), the control unit 10 , V (t) is stored in Vout (t) (step S8), and Vout (t) is output (step S9). That is, when it is determined that the current sensor output value is decreased compared to the previous corrected output value, the control unit 10 outputs the same value as the sensor output value as the corrected output value (substantially corrected). Is not done).
On the other hand, when it is determined that V (t) <Vout (t−1) is not satisfied, that is, the current sensor output value is higher than or equal to the previous corrected output value (step S6; NO) ), The controller 10 stores the value of Vout (t−1) in Vout (t) (step S7), and outputs Vout (t) (step S9). That is, when it is determined that the current sensor output value is higher than or equal to the previous corrected output value, the control unit 10 outputs the same corrected output value as the previous corrected output value. .

  When the output of Vout (t) ends, the control unit 10 stores Vout (t) in the storage area of Vout (t−1) (step S10), and stores V (t in the storage area of V (t−1). ) Is stored (step S11), and the correction process is terminated.

  As described above, according to the control unit 10 of the moisture sensor 1, the correction process is executed on the sensor output value that is the moisture content information of the soil acquired by the sensor unit 11, and the influence of the temperature on the sensor output value is corrected. To do. Therefore, it is possible to output a corrected output value in which the influence of temperature is removed from the sensor output value, and the accuracy and reliability of the moisture content information of the soil can be improved.

  Specifically, in the correction process, it is determined whether or not water has been injected into the soil S based on the sensor output value from the sensor unit 11, and the sensor output is determined despite the determination that water has not been injected. If the value is rising, make corrections. Therefore, it is possible to prevent the sensor output value from increasing despite the fact that water is not injected due to the influence of temperature.

  The determination of whether or not water injection has been performed is based on whether or not the difference between the sensor output value from the sensor unit 11 and the sensor output value acquired immediately before from the sensor unit 11 exceeds a predetermined threshold value. By setting it as the structure to perform, it becomes possible to determine easily whether water injection was performed.

  If it is determined that water injection has not been performed, the sensor output value is the same value as the sensor output value immediately before the increase until the sensor output value returns to the sensor output value before the increase after the sensor output value starts increasing. By correcting so as to be, it is possible to prevent the sensor output value from increasing even though water is not poured.

In addition, the control part 10 is good also as performing the determination process which determines the moisture content level of the soil S with respect to a plant using the corrected output value output by the correction process, for example.
In this case, for each type of plant, a determination table (for example, ˜40: low (dry), 41-60: good, 61-80: somewhat high, 81) in which the moisture content [%] of the soil is associated with the water content level. ˜100: Many (root rot)) is stored in the storage unit 14. Moreover, it is set as the structure which can register the kind of plant planted in the soil S by the operation part 12, and the kind of registered plant is memorize | stored in the memory | storage part 14. FIG. In the determination process, the control unit 10 reads the determination table for the registered plant type from the storage unit 14, determines the moisture level corresponding to the corrected output value based on the determination table, and determines the determination result. The data is output to a mobile terminal of a user connected via the display unit 13 or the communication unit 15.
In this way, the determination process using the corrected output value instead of the raw data of the sensor output value is performed, so that the determination of the moisture level of the soil with respect to the growing plant can be accurately performed. It becomes possible, and a reliable determination result can be provided to the user.

<Modification 1>
Hereinafter, Modification 1 of the present embodiment will be described.
The inventor of the present application conducted an experiment to measure the relationship between the temperature of the soil in the pot and the output value of the sensor having the configuration of the sensor unit 11 for two pots containing soil having different water contents. FIG. 10 is a graph showing an example of the result.
As shown in FIG. 10, it can be confirmed that the sensor output value is linearly proportional to the soil temperature. Similarly, in the experiment with other pots, it was confirmed that the sensor output value was linearly proportional to the soil temperature.

That is, the corrected output value not affected by the soil temperature (when the apparent soil temperature is 0 [° C.]) is set as Vc (t), and the sensor output value at each time is expressed as V (t), If the soil temperature is T (t) and the correction coefficient α,
V (t) = αT (t) + Vc (t) (Equation 3)
Can be defined as By transforming (Equation 3), Vc (t) becomes
Vc (t) = V (t) −αT (t) (Formula 4)
Can be defined as

  Therefore, the moisture sensor 1 further includes a temperature sensor (not shown) as a temperature acquisition unit that acquires the temperature of the soil S. In the control unit 10, the sensor output value V (t) from the sensor unit 11. Instead of performing the correction processing of the above embodiment, the sensor output value V (t) from the sensor unit 11 and the temperature value T (t) from the temperature sensor are applied to the above (Equation 4), and Vc is not affected by temperature. The value of (t) may be output as the corrected output value Vout (t).

Here, the correction coefficient α is a constant under certain conditions, that is, the conditions such as the soil type of the soil S, the pot size, and the pot shape (when using a pot) are the same. If the conditions are different, it changes according to the conditions. Therefore, for example, α is statistically calculated in advance for each combination of each soil type (when not placed in a pot), each soil type, pot size, and pot shape, and stored in the storage unit 14 for control. The unit 10 may read and correct α corresponding to the soil type, pot size, and pot shape of the soil S to be measured. The soil type of the soil S to be measured, the presence / absence of use of a pot, the pot size, the shape of the pot, and the like are input by the operation unit 12 and stored (registered) in the storage unit 14.
Moreover, some sample data of the temperature [° C.] and the sensor output value [%] of the soil S to be measured are acquired, and the control unit 10 uses the acquired data, the above (formula 3), and the like to obtain α May be calculated in advance.

In this way, the influence of the sensor output value V (t) due to the temperature can be corrected based on the temperature T (t) of the soil S. By this correction, it becomes possible to output a corrected output value in which the influence of temperature is removed from the sensor output value, and the accuracy and reliability of the moisture content information of the soil can be improved.
Moreover, by changing α according to the type of soil S, the pot size, the shape of the pot, and the like, it becomes possible to provide the user with an accurate amount of soil moisture according to the conditions of the measurement target.

<Modification 2>
Hereinafter, Modification 2 of the present embodiment will be described.
As described in Modification 1 above, when the sensor output value at each time is V (t) and the soil temperature is T (t), it is not affected by the temperature of the soil S (apparently the soil temperature is 0 ° C. The corrected output value Vc (t) can be calculated using (Equation 4).
In the modified example 2, first, the sensor output value from the sensor unit 11 is acquired by the control unit 10, and the sensor output value V (t) and the temperature value T (t) of the soil S are used. The value of (t) is corrected to Vc (t) that is not affected by the temperature of the soil S by the above (Equation 4), and the processing after step S2 of the correction processing shown in FIG. 9 is performed on the corrected Vc (t). To do. Specifically, correction processing is performed by replacing V (t) and V (t−1) in FIG. 9 with Vc (t) and Vc (t−1), respectively.

  As described above, by combining the above embodiment and the first modification, it is possible to further improve the accuracy and reliability of the moisture amount information.

  As mentioned above, although embodiment of this invention and its modification were demonstrated, the description content in the said embodiment and modification is a suitable example of the moisture content correction apparatus which concerns on this invention, and is not limited to this. Absent.

  For example, in the embodiment and the modification described above, the moisture sensor 1 includes the moisture amount correcting device, and the sensor output value from the sensor unit 11 is corrected in the moisture sensor 1, but as illustrated in FIG. The moisture sensor 1 and the server 2 including the moisture amount correction device are connected via the communication network N, and the server 2 corrects the sensor output value acquired from the moisture sensor 1 via the communication network N. May be. The communication network N is, for example, an Internet line, and includes a line network such as a wireless local area network (LAN) or a mobile communication network for connecting each device to the Internet line.

  Specifically, the server 2 is a computer device or a terminal device that includes a control unit, a storage unit, an operation unit, a display unit, a communication unit, and the like, and the control unit of the server 2 is connected to the moisture sensor 1 via the communication unit. The sensor output value is acquired, and the correction process described in the above embodiment is performed on the acquired sensor output value. Alternatively, the control unit of the server 2 acquires the sensor output value and the temperature value from the moisture sensor 1 via the communication unit, and the first modified example or the modified example based on the acquired temperature value with respect to the acquired sensor output value. The correction process described in 2 is performed. For example, the corrected output value is transmitted to the mobile terminal 3 of the user of the moisture sensor 1 registered in the server 2 in advance, and is output from the mobile terminal 3. Further, the server 2 may perform the above-described water content level determination process based on the corrected output value, and transmit the water content level determination result to the mobile terminal 3.

  In the case of the configuration using the server 2, for example, it becomes possible to manage the amount of water in a vast land at a garden or farm level. For example, the moisture sensor 1 is arranged for each area, the moisture amount is measured at each moisture sensor 1 every predetermined time, the sensor output value is transmitted to the server 2, and the sensor output value is corrected by the server 2 at once. By managing and sending the moisture content information (corrected output value) and moisture content level of each area to the user's mobile terminal 3, the user can easily grasp the status of the moisture content of each area. It becomes.

In this embodiment, after determining ΔV (t)> Vth, ΔV (t)> 0 is determined and correction is performed based on the determination result. However, the present invention is not limited to this, and ΔV (t)> If it is determined whether or not ΔV (t)> 0, it may be determined whether or not ΔV (t)> Vth. If ΔV (t)> 0 and ΔV (t)> Vth is not satisfied, Vout (t−1) may be output as the corrected output value Vout (t).
Also, as a computer-readable medium storing a program for executing each of the above processes, a non-volatile memory such as a flash memory, a portable recording medium such as a CD-ROM, in addition to a ROM, a hard disk, etc. Is also possible. A carrier wave is also used as a medium for providing program data via a predetermined communication line.

  In addition, the detailed configuration and detailed operation of each device constituting the moisture amount correcting device can be changed as appropriate without departing from the spirit of the invention.

(Appendix)
Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
<Claim 1>
An acquisition unit for acquiring soil moisture content information;
Based on the moisture amount information acquired by the acquisition unit, a water injection determination unit that determines whether water has been injected into the soil;
An increase determination unit that determines whether or not the moisture content information acquired by the acquisition unit is increasing;
A correction unit that corrects the water content information based on the determination results of the water injection determination unit and the rise determination unit;
A water content correction apparatus comprising:
<Claim 2>
The water content correction apparatus according to claim 1, wherein when the water injection determination unit determines that water injection is not performed, the increase determination unit determines whether the water content information has increased.
<Claim 3>
The water amount correction device according to claim 1, wherein the water injection determination unit determines whether or not water injection has been performed when the increase determination unit determines that the water content information has increased.
<Claim 4>
The water injection determination unit is configured to inject water based on whether or not the difference between the water content information acquired by the acquisition unit and the water content information acquired by the acquisition unit immediately before exceeds a predetermined threshold. The moisture content correction apparatus according to any one of claims 1 to 3, wherein it is determined whether or not the operation has been performed.
<Claim 5>
The correction unit determines that the water injection determination unit determines that water injection has not been performed, and the increase determination unit determines that the water content information has increased, immediately before the value of the water content information increases. The water content correction apparatus according to any one of claims 1 to 4, wherein the water content is corrected to have the same value as the water content information.
<Claim 6>
A temperature acquisition unit for acquiring temperature information of the soil;
The moisture correction apparatus according to any one of claims 1 to 5, wherein the correction unit corrects the moisture content information acquired by the acquisition unit based on the temperature information acquired by the temperature acquisition unit.
<Claim 7>
The said correction | amendment part is a moisture content correction | amendment apparatus of Claim 6 which correct | amends the moisture content information acquired by the said acquisition part further based on the kind of the said soil.
<Claim 8>
The said correction | amendment part is a moisture content correction | amendment apparatus of Claim 7 which correct | amends the moisture content information acquired by the said acquisition part further based on the size and shape of the pot which put the said soil further.
<Claim 9>
In the correction based on the temperature information, the moisture content information at each time is V (t), the soil temperature is T (t), the corrected moisture content information is Vc (t), and the correction coefficient is α.
Vc (t) = V (t) −αT (t)
The water content correction apparatus according to any one of claims 6 to 8, represented by:
<Claim 10>
An acquisition step of acquiring moisture content information of the soil;
Based on the water content information acquired by the acquisition step, a water injection determination step of determining whether or not water has been injected into the soil,
An increase determination step for determining whether or not the water content information acquired by the acquisition step is increasing;
Based on the determination results of the water injection determination step and the increase determination step, a correction step of correcting the water content information;
Moisture correction method including
<Claim 11>
A computer used in a moisture correction device that corrects moisture information acquired by an acquisition unit that acquires moisture information of soil,
A water injection determination unit that determines whether water has been injected into the soil based on the water content information acquired by the acquisition unit,
An increase determination unit for determining whether or not the moisture content information acquired by the acquisition unit is increasing;
A correction unit that corrects the moisture amount information based on the determination results of the water injection determination unit and the increase determination unit,
Program to function as.

DESCRIPTION OF SYMBOLS 1 Moisture sensor 10 Control part 11 Sensor part 12 Operation part 13 Display part 14 Storage part 15 Communication part 16 Time measuring part 17 Bus 2 Server 3 Portable terminal

Claims (10)

An acquisition unit for acquiring soil moisture content information;
Based on the moisture amount information acquired by the acquisition unit, a water injection determination unit that determines whether water has been injected into the soil;
An increase determination unit that determines whether or not the moisture content information acquired by the acquisition unit is increasing;
On the basis of the water injection determination unit and the rise judgment unit of the judgment result, Bei example and a correction unit for correcting the moisture content information,
The correction unit determines that the water injection determination unit determines that water injection has not been performed, and the increase determination unit determines that the water content information has increased, immediately before the value of the water content information increases. Water amount correction apparatus for correcting the water content information to be the same value as the water content information .   The water content correction apparatus according to claim 1, wherein when the water injection determination unit determines that water injection is not performed, the increase determination unit determines whether the water content information has increased.   The water amount correction device according to claim 1, wherein the water injection determination unit determines whether or not water injection has been performed when the increase determination unit determines that the water content information has increased.   The water injection determination unit is configured to inject water based on whether or not the difference between the water content information acquired by the acquisition unit and the water content information acquired by the acquisition unit immediately before exceeds a predetermined threshold. The water content correction apparatus according to any one of claims 1 to 3, wherein it is determined whether or not the operation has been performed. A temperature acquisition unit for acquiring temperature information of the soil;
The water content correction apparatus according to any one of claims 1 to 4 , wherein the correction unit corrects the water content information acquired by the acquisition unit based on the temperature information acquired by the temperature acquisition unit. The moisture correction apparatus according to claim 5 , wherein the correction unit further corrects the moisture content information acquired by the acquisition unit based on the type of soil. The said correction | amendment part is a moisture content correction | amendment apparatus of Claim 6 which correct | amends the moisture content information acquired by the said acquisition part further based on the size and shape of the pot which put the said soil further. In the correction based on the temperature information, the moisture content information at each time is V (t), the soil temperature is T (t), the corrected moisture content information is Vc (t), and the correction coefficient is α.
Vc (t) = V (t) −αT (t)
The water content correction apparatus according to any one of claims 5 to 7 , represented by : An acquisition step of acquiring moisture content information of the soil;
Based on the water content information acquired by the acquisition step, a water injection determination step of determining whether or not water has been injected into the soil,
An increase determination step for determining whether or not the water content information acquired by the acquisition step is increasing;
A correction step of correcting the water content information based on the determination results of the water injection determination step and the increase determination step ,
In the correction step, when the water injection determination step determines that water injection is not being performed, and the increase determination step determines that the water content information has increased, the value of the water content information immediately before the increase Water amount correction method for correcting to the same value as the water content information . A computer used in a moisture correction device that corrects moisture information acquired by an acquisition unit that acquires moisture information of soil,
A water injection determination unit that determines whether water has been injected into the soil based on the water content information acquired by the acquisition unit,
An increase determination unit for determining whether or not the moisture content information acquired by the acquisition unit is increasing;
A correction unit that corrects the moisture amount information based on the determination results of the water injection determination unit and the increase determination unit,
To function as,
The correction unit determines that the water injection determination unit determines that water injection has not been performed, and the increase determination unit determines that the water content information has increased, immediately before the value of the water content information increases. A program that corrects to the same value as the moisture content information .

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