JP2020134317A - Earth fill moisture content measuring system and earth fill moisture content measuring device - Google Patents

Abstract

To provide a system capable of easily measuring a moisture content of an earth fill.SOLUTION: An earth fill moisture measuring system comprise: a measuring device 10 which has an embedded section 12 configured to be able to be embedded in an earth fill W, a sensor section 13 installed in the earth fill to measure a moisture content of earth around the same and a first communication section 15a with a function to communicate with an outside; and an information processing device 20 which has a second communication section receiving moisture content information which is the information on the moisture content measured with the sensor section 13 from the measuring device 10 and a display section displaying the moisture content information.SELECTED DRAWING: Figure 1

Description

The present invention relates to a measurement system for the water content (including the water content ratio) of the embankment for measuring the water content ratio of the embankment, and particularly to a water content measurement system for the embankment constituting the road base.

Generally, when constructing roads, bridges, buildings, etc., an embankment is formed as a base. For example, a paved road has a structure in which a road body, a roadbed, a lower roadbed and an upper roadbed composed of embankments containing crushed stone, cement and lime, and a base layer and a surface layer containing asphalt are laminated in order from underground to the ground surface. .. The embankment that constitutes the roadbed contains water, and after being laid on the roadbed, it is compacted by a compaction machine such as a roller until a predetermined density is obtained, and the amount of water changes. At this time, it is necessary to adjust the water content by compacting or sprinkling water so that the embankment is within the range of the water content ratio at which a predetermined compaction degree can be obtained. When calculating the water content ratio of the embankment, since an accurate value cannot be calculated based on the water content of the embankment surface, a part of the embankment is dug up every several tens of meters to several hundreds of meters to take out a predetermined amount of embankment and keep the temperature constant. A method of calculating the water content ratio in the embankment from the change in weight after the water is removed by the drying furnace and before the removal is adopted (for example, Non-Patent Document 1).

Japanese Geotechnical Society Soil Examination Practice Book (3rd Revised Edition) Editorial Committee, "Soil Examination Basics and Guide", 1st Revised Edition, Japanese Geotechnical Society, July 2001, p. 17-19, 71-78

However, when a part of the compacted embankment is placed in a constant temperature drying oven, it is difficult to collect the compacted embankment with bare hands, so it is necessary to dig up the embankment with a shovel or the like and take out a part of the embankment. After measuring the water content, it is necessary to refill the excavated embankment and compact it again with a compaction machine. Further, in order to calculate the accurate water content ratio of the embankment, the embankment must be heated in a constant temperature drying oven for a long time such as until the dry mass becomes constant (18 to 24 hours is recommended in Non-Patent Document 1). Further, when calculating the water content ratio of the heated embankment, the heated embankment needs to be cooled to near the ambient temperature (almost room temperature). When cooling, it is necessary to cool using a desiccator so that the dried embankment does not absorb the moisture in the air, and the water content ratio of the embankment is high when constructing long roads or underlaying large-scale buildings. In addition to the time required for the measurement work, it takes time and effort to bring in the measuring equipment, which may affect the construction period.

Therefore, an object of the present invention is to provide a system capable of measuring the water content ratio of the embankment more easily than the above-mentioned conventional technique.

In view of the above problems, the inventors of the present application have studied various methods for measuring the water content in the embankment. By adopting the following system, the water content in the embankment can be measured without digging up the embankment and putting it in a constant temperature drying furnace. It was found that (including the water content ratio) can be measured.

That is, in one aspect of the present disclosure, the water content measuring system for measuring the water content of the filling is the embedding portion configured to be embedded in the filling and the water content of the surrounding filling placed in the filling. A measuring device including a sensor unit for measuring the amount and a first communication unit having a function of communicating with the outside, and a second receiving water content information which is information on the water content measured by the sensor unit from the measuring device. It is characterized by including an information processing device including a communication unit and a display unit for displaying the water content information.

According to this aspect, an embankment is provided so that it can be embedded in the embankment, the water content of the embankment is measured by the sensor unit while the embankment is embedded in the embankment, and the information is transmitted by an information processing device. I am trying to confirm it. As a result, the water content (including the water content ratio) of the embankment can be easily measured without using a constant temperature drying furnace.

According to the embankment water content measuring system according to the present invention, the embankment water content (including the water content ratio) can be measured more easily than before.

Schematic diagram showing the main configuration of the embankment moisture measurement system Block configuration diagram of the embankment water content measurement system The figure which shows the configuration example of the display screen of an information processing apparatus The figure which shows the configuration example of the measuring device used for the water content measurement system of the embankment Diagram for explaining how to install the measuring device The figure for demonstrating another example of the installation method of a measuring device. The figure which shows the other configuration example of the measuring apparatus The figure for demonstrating another example of the installation method of a measuring device. The figure which shows the example of the installation method of the measuring device and the example of the data acquisition method The figure which shows an example of the data acquisition method of the water content measurement system of the embankment The figure which shows an example of the data acquisition method of the water content measurement system of the embankment The figure which shows an example of the data acquisition method of the water content measurement system of the embankment The figure which shows the structural example of the measuring apparatus of 2nd Embodiment Block configuration diagram of the measuring device of the second embodiment Schematic configuration diagram showing other configuration examples of the measuring device The figure for demonstrating the water content measurement using the measuring apparatus of FIG. Schematic configuration diagram showing other configuration examples of the measuring device The figure for demonstrating the water content measurement using the measuring apparatus of FIG. Schematic diagram showing the main configuration of a modified example of the water content measurement system for the filling

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its scope of application, or its use.

Here, the "moisture content" in the present disclosure is used as a concept including the ratio of water content in the embankment (also referred to as so-called water content or water content ratio), which is the object to be measured, in addition to the amount of water content in the embankment. However, in the present embodiment, for convenience of explanation, it may be simply referred to as "water content".

<First Embodiment>
As shown in FIGS. 1 and 2, the water content measuring system A (hereinafter, simply referred to as the measuring system A) for filling the filling according to the present embodiment includes an embedding portion 12 configured to be embedded in the filling W. A measuring device 10 having a sensor unit 13 arranged in the filling W and having a function of measuring the water content of the surrounding filling W, and a first communication unit 15 having a function of communicating with the outside, and a first measuring device 10. An information processing device 20 including a second communication unit 21 that acquires water content information measured by a sensor unit 13 via a communication unit 15 and an arithmetic processing unit 23 that calculates a water content ratio based on the water content information. It has. In FIG. 1, 15a shows the antenna of the first communication unit 15. The antenna 15a may be externally attached or built-in.

FIG. 1 shows an example in which the measurement system A of the present embodiment is applied to a construction site of a paved road G. In FIG. 1, the paved road G includes a road body G1, a roadbed G2, a lower roadbed G3 and an upper roadbed G4 composed of an embankment W containing crushed stone, cement and lime, and asphalt in this order from underground to the ground surface. It has a structure in which the including base layer G5 and the surface layer G6 are laminated. In the measurement system A, for example, after forming from the road body G1 to the upper roadbed G4, the embedded portion 12 of the measuring device 10 is embedded in the embankment W portion (for example, the upper layer roadbed G4), so that the sensor unit 13 performs the embankment. It is configured so that the water content information of the surrounding embankment W can be measured. In FIG. 1, the road body G1 to the upper roadbed G4 are shown by solid lines, and the base layer G5 and the surface layer G6 are shown by virtual lines. Generally, the embankment W is formed in the lower roadbed G3 and the upper roadbed G4.

FIG. 2 is a block configuration diagram of the measurement system A. As shown in FIG. 2, the measuring device 10 includes a sensor unit 13, a first communication unit 15, a driver 16, a memory 17, a power supply unit 18, and a position recognition unit 19. Further, although not shown in FIG. 2, the measuring device 10 includes the above-mentioned embedded portion 12.

In the measuring device 10, the embankment information (information indicating the state of the embankment) including the information on the water content of the embankment W measured by the sensor unit 13 (hereinafter referred to as the water content information) is collected in the driver 16 and stored in the memory 17. It is stored. Further, the embankment information collected in the driver 16 is transmitted via the first communication unit 15 to the communication unit 21 of the information processing device 20 described later via wireless communication / wired communication or the like. Further, the position information measured by the position recognition unit 19 is transmitted to the second communication unit 21 of the information processing device 20 described later via the first communication unit 15.

Here, the first communication unit 15 may directly communicate with the second communication unit 21 of the information processing device 20, may communicate through a network line such as the Internet, or may be a dedicated repeater. Communication may be made via (not shown). Preferably, as shown in FIG. 1, if the information of the measuring device 10 can be transmitted to the information processing device 20 in the vicinity by wireless communication, it is easy to handle and the worker, the supervisor, etc. fill the embankment in real time. It is preferable because the embankment information such as the water content of W can be confirmed.

Further, when there are a plurality of measuring devices 10, the plurality of measuring devices 10 may be configured to be able to communicate with each other, and at least one of them may be configured to be connectable to the information processing device 20. Further, a part or all of the plurality of measuring devices 10 may have a function as a repeater. When a plurality of measuring devices 10 communicate with each other or are used as a repeater, information from another measuring device 10 may be temporarily stored in the memory 17 of the measuring device 10, or the other measuring device 10 may be used. Information from may be aggregated. Further, the memory 17 is configured to be removable from the measuring device 10, the memory 17 in a state where the information is temporarily stored or the information is aggregated as described above is removed, and a computer or the like (not shown) is used. , The data may be retrieved.

The information processing device 20 includes a second communication unit 21 for communicating with the measuring device 10, a GPS unit 22 having a positioning function using GPS (Global Positioning System), an arithmetic processing unit 23, a display unit 24, and the like. It includes an image capturing unit 25, a third communication unit 27, and a memory 29 composed of an SD card or the like.

In the information processing device 20, the second communication unit 21 is configured to enable bidirectional communication with the first communication unit 15 of each measurement device 10. Then, the second communication unit 21 receives the position information and the embankment information (including the water content information) of the surrounding embankment W from the measuring device 10 (each measuring device 10 when there are a plurality of measuring devices 10). The information is transmitted to the arithmetic processing unit 23.

For example, the GPS unit 22 and the image acquisition unit 25 display a design drawing, a map, a photograph, etc. of the work site on the display screen DP (see FIG. 3) of the display unit 24, and display the location of the measuring device 10 there. It is used to do things like that.

FIG. 3 shows a specific display example of the display unit 24. In the example of FIG. 3, it is assumed that the image capturing unit 25 holds an image of the design drawing. Then, for example, the arithmetic processing unit 23 receives the positioning information acquired by the GPS unit 22 from each measuring device 10 based on the correspondence between the positioning information and the design drawing of the work site received from the image capturing unit 25. The position of each measuring device 10 on the design drawing is specified based on the position information, and the information of the embankment W measured by each measuring device 10 is displayed at that position. Although FIG. 3 shows an example in which the water content of each measuring device 10 is displayed on the display unit 24, other items such as temperature and pressure can be selected and displayed on the display unit 24. May be good. Further, these plurality of items may be displayed at the same time.

Further, the information processing device 20 is connected to an external system / service such as cloud computing 35 or an external device such as a printer 36 via the third communication unit 27, and the calculation result in the calculation processing unit 23 or the like. May be configured to send.

Hereinafter, each component will be described more specifically.

(1. Measuring device)
-Embedded part, sensor part-
The embedding unit 12 may be configured so as to be able to be embedded in the embankment W so that the detection unit 13a (for example, an electrode) of the sensor unit 13 is arranged in the embankment W, and the specific configuration thereof is There is no particular limitation. The sensor unit 13 may be configured to be capable of measuring the water content of the embankment W, and includes, for example, a water content sensor 131 for measuring the water content of the embankment W. The embedded portion 12 and the sensor portion 13 may be integrally configured, or the embedded portion 12 and the sensor portion 13 may be separated from each other.

In the sensor unit 13, the type of the water content sensor 131 and the method for detecting the water content are not particularly limited. For example, as the water content sensor 131, (1) a DC current is passed through the filling W and an electric resistance type sensor that measures the water content based on the resistance value, and (2) an AC current is passed through the filling W to perform electrostatic capacity ( A capacitance type sensor that measures the amount of water based on changes in capacitance), (3) a microwave type sensor that irradiates the filling W with microwaves and measures the amount of water from its attenuation rate and absorption rate, ( 4) A near-infrared sensor that irradiates the filling W with light containing near infrared rays and measures the amount of water from its reflectance. (5) The filling W is irradiated with neutrons and is generated from hydrogen atoms in the filling W. A neutron-type sensor that calculates the amount of water based on the result of conversion of hot neutrons into charge pulses, (6) A heat probe that applies heat to the filling W to measure the specific heat and calculates the amount of water from the thermal conductivity. Examples of the sensor of the formula, (7) a matrix potential sensor that calculates the amount of water by measuring the capillary force.

The shape of the sensor unit 13 is not particularly limited. For example, the sensor unit 13 and the embedded unit 12 may be integrally configured, and the sensor unit 13 may be arranged in the ground by embedding the embedded unit 12 (for example, FIG. 4). reference). Further, the embedded portion 12 and the sensor portion 13 may be separated from each other (see, for example, FIG. 6). Further, the sensor unit 13 may be configured so that a part of the embankment can be loosened and embedded in the embankment, or all or a part of the sensor unit 13 can be embedded before the embankment is compacted. It may be configured.

In the measurement system A of the present disclosure, one sensor unit 13 (measurement device 10) may be used, or a plurality of sensor units 13 may be used. For example, as shown in FIG. 1 and the like, by enabling communication with each other by using a plurality of measuring devices 10, a plurality of sensor units 13 can be linked, and for example, a wide range of measurement positions can be recognized at the same time. Will be able to. The operation of the system when a plurality of sensor units 13 (measurement devices 10) are used will be specifically described later.

The sensor unit 13 may be buried in the embankment at all times as well as when measuring the water content and the like. By such constant burial, the time-series measurement result group obtained from the sensor unit 13 serves as an index of the stability of the embankment W and can play a role of preventive maintenance. In addition, it is a data group suitable for optimizing construction plans such as repair and maintenance and for grasping priority repair points in advance. Furthermore, economic loss due to road closure due to construction work can be minimized.

A part or all of the sensor unit 13 may be covered with an insulating material (for example, made of nylon) such as a bag or a sheet. It is possible to prevent deterioration of the electrode member used for the sensor unit 13 and alleviate an excessive reaction of the electric conductivity and the drying density of the embankment W. Further, for example, when rough information is desired, water content data can be efficiently obtained.

From the viewpoint of confirming the state of the embankment W from various aspects, the sensor unit 13 is one or more selected from the group consisting of pH, temperature, chloride ion, pressure, and Z-axis displacement, in addition to measuring the water content. The element may be measurable. For example, when the sensor unit 13 can measure (1) pH, it can be used to check the situation such as rainfall of acidic rain, and (2) when it can measure temperature, it can be used for freezing of embankment in winter. It can be used to check the situation, (3) if chloride ions can be measured, it can be used to detect the mixing of seawater into the embankment, and (4) if the pressure can be measured, the degree of compaction of the embankment. It can be used for measurement, and (5) when the Z-axis displacement can be measured, the unevenness of the embankment can be measured, so that it can be used for grasping the position where water in the embankment is likely to accumulate. In the example of FIG. 2, an example is shown in which the sensor unit 13 includes a pressure sensor 133 and a temperature sensor 135 in addition to the water content sensor 131.

4 to 9 show configuration examples of the sensor unit 13 and the embedded unit 12.

FIG. 4 shows an example in which the embedded portion 12 and the sensor portion 13 are integrally configured. In the example of FIG. 4, a rod-shaped implant extending downward is embedded in the lower surface of the main body 11 in which the first communication unit 15, the driver 16, the memory 17, the power supply unit 18, and the position recognition unit 19 of FIG. 2 are stored. An example is shown in which the portion 12 is projected. A function other than the above may be mounted on the main body 11.

FIGS. 4A to 4D show an example in which a rod-shaped sensor portion 13 (embedded portion 12) is attached to the rectangular main body portion 11. 4 (a) to 4 (d) show an example in which the sensor unit 13 itself has a function as the embedded unit 12, that is, the sensor unit 13 is configured to also serve as the embedded unit 12. In this case, for example, the sensor portion 13 (also used as the embedded portion 12) is a conductive moisture sensor made of a highly rigid material (for example, metal), and for example, the entire sensor portion 13 (the entire rod-shaped portion). May have a function as a detection unit 13a.

In FIG. 4A, the lower end surface of the tip portion 14 of the sensor portion 13 is flat. In FIG. 4B, the tip portion 14 of the sensor portion 13 has a nail shape formed so as to gradually become thinner toward the tip end. By making the tip portion tapered in this way, it becomes easy to pierce the compacted embankment. In FIG. 4 (c), two nail-shaped sensor portions 13 similar to those in FIG. 4 (b) are configured to extend in parallel. In FIG. 4 (d), the shape of the main body 11 is different from that in FIG. 4 (b), and it is substantially cylindrical. For example, in FIG. 4D, the rigidity of the main body 11 itself or the upper end thereof is relatively increased, and the upper end surface of the main body 11 is used as a striking surface for striking with a tool H such as a hammer. Can be done. As a result, even if the embankment W is relatively hard and compacted, the sensor unit 13 can be easily embedded in the embankment W.

FIG. 4E shows an example in which the embedded portion 12 has a flat plate shape and the sensor portion 13 is provided on the wide surface thereof. In FIG. 4 (e), the tip portion 14 of the embedding portion 12 gradually narrows toward the tip end, and is configured to be easily embedded in the embankment W. In FIG. 4E, the material of the embedded portion 12 is not particularly limited as long as a certain degree of rigidity can be secured, but for example, a resin such as acrylic or a metal can be adopted. For example, a sheet-shaped detection unit 13a (for example, an electrode) is attached to the sensor unit 13. In each aspect including FIGS. 4A to 4E, the mounting position of the detection unit 13a of the sensor unit 13 is not particularly limited, but for example, the embankment portion 12 is embedded in the embankment W. It is a position where it is placed in the embankment W when it is removed.

The method of embedding the embedded portion 12 (the sensor unit 13 when the sensor unit 13 also serves as the embedded portion 12) in the embankment W is not particularly limited, but for example, (1) one of the embankments W. The part may be loosened and embedded, (2) it may be screwed directly into the embankment, or it may be embedded by tapping it, or (3) the sensor or a part of the sensor may be embedded before the embankment is compacted. May be good.

5 and 6 show an example of a method of embedding the embankment portion 12 (sensor portion 13) after loosening a part of the embankment W.

Specifically, in the example of FIG. 5, a part of the embankment W is loosened by driving a nail-shaped member 8 having the same thickness as the sensor portion 13 or slightly thinner than the sensor portion 13 into the embankment W (FIG. 5 (a). )), The nail-shaped member 8 is pulled out to form a pilot hole 81 (FIG. 5 (b)), and the tip portion 14 of the sensor portion 13 is inserted into the formed pilot hole 81 and embedded, whereby the sensor portion 13 is formed. It is designed to be placed in the embankment W.

In this way, by providing the pilot hole 81 in the embankment W in advance, the sensor unit 13 itself and the tip portion 14 of the sensor unit 13 are not damaged as compared with the case where the sensor unit 13 is embedded in the embankment by hitting. The sensor unit 13 can be embedded (arranged) in the embankment W. More preferably, in FIG. 5, when the prepared hole 81 formed is slightly thinner than the tip portion 14 of the sensor portion 13, the tip portion 14 of the sensor portion 13 is in close contact with the embankment W, so that the amount of water in the embankment W is increased. The measurement becomes more accurate.

In the example of FIG. 6, an example of the configuration in which the embedded portion and the sensor portion 13 are separated from each other is shown.

In FIG. 6, the tubular member 50 as the embedded portion has a substantially cylindrical shape, the upper end portion 52 gradually expands toward the upper end side, and an opening for inserting the sensor portion 13 is formed at the upper end portion thereof. Has been done. Further, the lower end portion 51 of the tubular member 50 has a tapered shape toward the tip end side, and an opening (at the tip end thereof) so that the tip end portion 14 of the sensor portion 13 can be projected into the embankment W. (Not shown) is formed. In this example, first, the tubular member 50 is driven into the embankment W and embedded (FIG. 6A), and the tip 14 of the sensor portion 13 is inserted through the opening of the upper end portion 52 of the tubular member 50 (FIG. 6 (Fig. 6)). b)) By projecting the tip 14 of the sensor unit 13 from the opening of the lower end portion 51 of the tubular member 50 (FIG. 6 (c)), the sensor unit 13 is embedded in the embankment 30. With such a configuration, the sensor unit 13 can be arranged (embedded) in the embankment W without damaging the sensor unit 13 itself or the tip portion 14 of the sensor unit 13 as compared with the example of FIG.

7 and 8 show an example of a configuration and an embedding method in which the embedding unit 12 (sensor unit 13) is directly screwed into the embankment or tapped into the embankment.

In the example of FIG. 7, the tip portion 14 of the embedded portion 12 (sensor portion 13) has a drill shape, and by screwing it into the embankment W while rotating it, the tip portion 14 of the sensor portion 13 is placed in the embankment W. It is configured so that it can be embedded.

In the example of FIG. 8, the embedded portion 12 (sensor portion 13) is configured to be removable from the main body portion 11. As shown in FIG. 8, at the upper end of the embedded portion 12 (the end opposite to the longitudinal direction of the tip portion 14), the embedded portion 12 is driven into the embankment W using a striking tool H such as a hammer. The striking surface 12a of the above is formed. FIG. 8 shows an example of the embedding procedure of the measuring device 10. First, as shown in FIG. 8A, the embedding portion 12 is removed from the main body portion 11 and the embedding portion is used with the tool H. 12 may be driven into the embankment 30, and then the main body 11 may be attached to the upper side of the striking surface 12a of the embedded portion 12, as shown in FIG. 8 (b). The mounting structure of the main body portion 11 and the embedded portion 12 is not particularly limited, but for example, a magnetic force can be used or a mechanical engaging mechanism can be adopted.

Although specific illustration is omitted, in the configurations of FIGS. 4, 7, 8 and the like, the embedded portion 12 and the main body portion 11 of the measuring device 10 can be easily pulled out from the embankment W. It may be provided with a through hole, a convex portion, a concave portion, a knob portion, or the like, which is configured so that a finger can be passed through or a finger can be put on.

FIG. 9 shows an example in which a part or all of the measuring device 10 is buried before the embankment W is compacted. By burying a part or all of the sensor unit 13, it is possible to measure the water content in the embankment W without any work or operation on the embankment W even after the embankment W is compacted.

FIG. 9A shows an example in which a part of the measuring device 10 is embedded. Specifically, the main body 11 installed on the ground is configured to be able to communicate with the sensor 13 buried in the ground. In the configuration of FIG. 9A, a communication unit 13b configured to enable wireless communication with the main body 11 is provided integrally with the sensor unit 13, and the measurement result of the sensor unit 13 is transmitted to the main body 11. It can be sent. The main body 11 installed on the ground is configured to be connectable to, for example, an information processing device 20 or the like by wireless communication or the like. The communication between the main body 11 and the information processing device 20 is the same as the above-described configuration, and the description thereof will be omitted here. Further, in the configuration as shown in FIG. 9A, the sensor unit 13 buried in the ground and the main body unit 11 installed on the ground are connected by wire so as to perform wired communication between each other. You may be.

FIG. 9B shows an example in which the entire measuring device 10 is embedded. In this case, as shown in FIG. 9B, information on the amount of water from each measuring device 10 embedded in the filling 30 can be transmitted to the flying object F such as a drone, the vehicle C, or the like. Then, even if the embedding place of the sensor 10 is not recognized from the appearance, the information on the water content from each measuring device 10 can be obtained by the flying object F, the vehicle C, or the like.

Note that FIG. 9A shows an example in which the sensor unit 13 has a long shape, but the shape is not limited to this. For example, the sensor unit 13 has a spherical shape, a rectangular parallelepiped shape, or other irregular three-dimensional shape. It may have a shape such as a rod shape, a sheet shape, a linear shape, or a multi-needle shape formed from a plurality of needle groups. Similarly, the shape of the measuring device 10 in FIG. 9B is not particularly limited, but is preferably designed to withstand the compaction pressure. Although specific illustration is omitted, for example, the measuring device 10 may have a configuration in which the sensor unit 13 and the like are housed inside a box-shaped housing or a capsule-shaped container made of a metal plate. That is, the measuring device 10 may have a housing (not shown) having a role of protecting the sensor unit 13 from pressure from the embankment W and other external forces, and the entire housing may be embedded in the embankment W.

As shown in FIG. 10, when a plurality of measuring devices 10 are installed at a work site, they may be configured to measure the amount of water between the measuring devices 10 adjacent to each other. For example, by applying a voltage between the electrodes of the sensor unit 13 of the adjacent measuring device 10, the electric resistance value or the dielectric constant between both electrodes is measured, and the water content is measured based on the measurement result. It may have been done. This makes it possible to measure not only the water content at points but also the water content at surfaces. In FIG. 10, three measuring devices 10a to 10c are installed at the work site, and the water content is measured between the adjacent measuring devices 10 (between ab, ac, bc), and the water content thereof is measured. An example in which the measurement result is displayed on the information processing apparatus 20 is shown.

-Power supply-
The power supply unit 18 has a function of supplying power necessary for measuring various data by the sensor unit 13 (for example, measuring the amount of water) and transmitting measurement data obtained from the sensor unit 13. The configuration of the power supply unit 18 is not particularly limited, but is composed of, for example, a storage battery (not shown) built in the measuring device 10. Further, when the measuring device 10 is configured to receive power supplied from an external power source (for example, a cubicle power source or the like), the power supply unit 18 may be configured by a power supply circuit. Further, an external power source and a storage battery may be used together. The measuring device 10 may be configured to receive power supply from a power supply system such as solar power generation, thermoelectric power generation, pressure power generation by a passing load of a vehicle or the like as an external power source.

-Position awareness unit-
The measuring device 10 may include a position recognition unit 19 for recognizing the position of the own machine at the work site (for example, a road). By providing the position recognition unit 19 in each measuring device 10, it becomes easy to confirm at which position of the work site (fill W) the water content is measured.

The configuration of the position recognition unit 19 is not particularly limited, but can be realized by, for example, installing a GPS function. Further, for example, as shown in FIG. 11A, a plurality of measuring devices 10 configured to be able to transmit and receive radio waves to each other are installed, and each measurement is performed based on the radio wave strength and the phase difference between the two. The device 10 may be able to grasp the position of its own machine. Further, as shown by a broken line in FIG. 11A, a radio wave generator 46 (corresponding to a sign) configured to be capable of generating radio waves 44 is prepared separately from the sensor 10, and the radio wave generator 46 is used. The measuring device 10 may be configured so that the position of the own device can be grasped based on the radio wave (strength, phase difference, etc.). The measuring device 10 may be provided with a function as a sign for grasping the installation position.

Further, when the measuring device 10 has a wireless communication function (for example, a communication function in the 920 MHz band) with the information processing device 20, the position recognition unit 19 uses the radio wave for the position recognition of its own device. It may be. It is preferable that the measuring device 10 has a wireless communication function in the 920 MHz band because it can perform communication at a distance of up to several hundred meters with low power consumption.

Further, the position recognition unit 19 may include a position calibration mechanism in addition to the position recognition function of the own machine. By doing so, when an error occurs in the position recognition information, the error from the actual position can be corrected.

Further, in the measuring system A for measuring the water content by a plurality of measuring devices 10, when a part of the measuring devices 10 is pulled out and moved to another position, the measuring device 10 (for example, the position recognition unit 19) or The information processing device 20 may be configured so that the relocation can be recognized.

Specifically, as illustrated in FIGS. 11A and 11B, the measuring device 10 or the information processing device 20 holds the position information (see FIG. 11A) of the measuring device 10 before the relocation. At the same time, by acquiring the position information of the relocation destination, the information processing device 20 is configured to display the positions of the measuring devices 10 both before and after the relocation and the measurement results (see FIG. 11B). As a result, even when the number of measuring devices 10 is small and the work site is relatively large, the water content measurement of the entire work site can be continuously performed. Further, even if the number of measuring devices 10 is small, data at an arbitrary position can be measured, and measurement at multiple points can be easily performed.

From the viewpoint of improving the battery life, the measuring device 10 may be provided with a "measurement start button (not shown)" indicating the start of measurement. When the "measurement start button" is pressed, for example, in the measuring device 10, the sensor unit 13 starts measuring the water content and the like, the position recognition unit 19 recognizes the position of the own machine, and the first communication unit 15 is pressed. It is transmitted to the information processing device 20 via.

Further, in the multipoint measurement as shown in FIG. 11, a series of operations other than insertion / removal can be automatically performed by using, for example, a program stored in the measuring device 10 from the time lag and the displacement of the water content data. It is possible.

Specifically, for example, when the measuring device 10 is inserted into the filling W, it is automatically determined from the change in the measurement data of the sensor unit 13 that "the own machine (measuring device 10) has been inserted into the filling W". The water content may be measured and the position information and time of the own machine may be recorded. For example, when an electric resistance type sensor is used as the sensor unit 13, the change in the measurement data can be grasped by the change in the electric resistance value. The specific method is not particularly limited, but for example, a predetermined range width (a value close to the water content data of the embankment) is provided for the electric resistance value, and when the electric resistance value is within the range, it is "inserted into the embankment W". The judgment method can be adopted.

Next, when the measuring device 10 is pulled out from the filling W, it is similarly determined from the displacement of the measurement data of the sensor unit 13 that "the own machine (measuring device 10) has been pulled out from the filling W", and the standby mode (standby mode). You may shift to the power saving mode) or monitor the position of your own machine over time.

Then, when the measuring device 10 is inserted into the embankment W again, the operation when the measuring device 10 is inserted into the embankment W may be performed, and so on, the operations of the above two paragraphs may be repeatedly performed.

Further, when a plurality of measuring devices 10 are used for the measuring system A, the water content data and the like are measured simultaneously by all the measuring devices 10 at regular time intervals (for example, every 1 to 3 minutes), and the measured water content is measured. , Position information, and acquisition time may be aggregated in the information processing device 20. Then, when the change in the measurement position is not confirmed from the time of the immediately preceding measurement, the display may not be updated or the immediately preceding measurement result may be deleted and updated with new measurement data. On the other hand, where the change in the installation position of the measuring device 10 was confirmed from the time of the immediately preceding measurement, the measurement result immediately before being held (the measurement result at the position before the relocation) and the new measurement result (the position after the relocation). (Measurement result in) may be displayed together.

(2. Information processing device)
The information processing device 20 has a function of acquiring measurement data acquired by one or a plurality of measurement devices 10, and preferably has a function of arithmetically processing and displaying the measurement data. The specific configuration of the information processing device 20 is not particularly limited, and examples thereof include a tablet computer and a terminal device such as a smartphone as shown in FIG. Further, the information processing device 20 may be mounted on the flying object F as shown in FIGS. 9 and 19. Further, the information processing device 20 may be a stationary arithmetic processing device such as a personal computer or a server connected via a network such as the Internet.

As described above, the GPS unit 22 and the image acquisition unit 25 prepare design drawings, maps, photographs, etc. of the work site for display on the display unit 24, and the position of the measuring device 10 on the design drawings, etc. It also has a function to acquire position information for displaying measurement results and the like.

Specifically, the image capturing unit 25 has a function of holding, for example, a design drawing of a road or a structure at a work site or an aerial photograph (hereinafter, “construction map”). For example, when the information processing device 20 is a terminal device such as a tablet PC or a smartphone, the construction map may be captured in the image acquisition unit 25 in advance, or via a network such as a cloud service or the Internet. It may be taken in at the work site.

Further, as shown in FIG. 9, when the information processing device 20 is mounted on the flying object F or the like, the aerial photography data taken by the flying object F may be captured. In that case, the information processing device 20 mounted on the flying object 60 receives information such as water content measurement data from each measuring device 10, and the position of each measuring device 10 and the measurement data are linked based on the information. The processing may be performed, the processed data may be transmitted to the terminal device or the like, and the measurement result or the like may be displayed on the display unit of the terminal device or the like. As a result, the operator can comprehensively and easily acquire the installation location of the measuring device 10 and the information on the water content at each installation location. Although specific illustration is omitted, in the embodiment using such a flying object F, the measuring device 10 (including the marker) has an upper end portion or a vicinity of the upper end portion so as to be recognizable by aerial photography. It may be provided with an identification display having a design by a pattern, a figure, a character, a symbol, a coloring or the like. Further, the identification display may be changed for each measuring device 10. By doing so, it is possible to easily identify from the aerial photograph result which measuring device 10 is installed at which part of the work site (fill W).

The GPS unit 22 has a function of acquiring the position information of the information processing device 20 by a conventionally known GPS function. The position information of the information processing device 20 acquired by the GPS unit 22 has the absolute position of the information processing device 20 when, for example, the communication radio wave between the information processing device 20 and the measuring device 10 is used to specify the position information. As you can see, the information processing device 20 can be used as a marker.

The construction map captured by the image capturing unit 25 and the position information acquired by the GPS unit 22 are sent to the arithmetic processing unit 23.

The arithmetic processing unit 23 has a function of comprehensively controlling the operation of the entire measurement system A. The arithmetic processing unit 23 can be realized by using, for example, a microcomputer.

Specifically, for example, the measurement data and the position information of the water content are acquired from each measuring device 10, and these data, the construction map received from the image capturing unit 25, and the position information received from the GPS unit 22 The display information of the display screen DP of the display unit 24 is generated based on the above. For example, the arithmetic processing unit 23 links the construction map and the position information of each measuring device 10, and displays the information of the water content measured by each measuring device 10 at the position of each measuring device 10. , Control the display unit 24. As a result, it becomes possible to recognize at a glance which part of the water content was measured on the construction map captured by the computer.

In addition, in order to make it easier for the arithmetic processing unit 23 to align the construction map with the installation position of the measuring device 10, as illustrated in FIG. 12, the start point and end point of the work site (for example, the work site is a road). In this case, positioning signs 48 may be installed at both ends in the width direction of the road.

The transfer timing of the measurement data from the sensor unit 13 of each measurement device 10 to the arithmetic processing unit 23 may be arbitrarily set. For example, when the fluctuation of the water content with the passage of time is minute, the transmission interval from the measuring device 10 to the arithmetic processing unit 23 can be set to be relatively long (for example, every 10 minutes to 10 days). Good. When obtaining or analyzing macroscopic and temporal water content data, it is preferable because the treatment can be simplified.

The arithmetic processing unit 23 may have a function as a means for recognizing excess or deficiency of water content. The means for recognizing excess or deficiency of water content has a function of determining what is different from the appropriate water content at the work site. In the arithmetic processing unit 23, for example, the upper and lower threshold values of the water content are set in advance by an external input or the like. Then, for example, it is preferable that the display unit 24 is displayed so that the moisture measurement site deviating from the threshold value can be identified. For example, it is preferable that the construction map displayed on the display screen DP of the display unit 24 is configured so that a portion deviating from the appropriate amount of water is recognized. More preferably, it is preferable that the water content information is configured so as to be visually recognized in the above-mentioned construction map. Visually recognizable display modes include, for example, colors, patterns, marks, numbers, and the like. For example, on the display screen DP of the display unit 24, a color or pattern reminiscent of a warning may be displayed on the excessive moisture portion or the insufficient moisture portion on the construction map to encourage repair. FIG. 3 shows an example in which the repaired portion is indicated by diagonal lines. Further, although specific illustration is omitted, in addition to the above warning display, excess / under information on the amount of water using specific numerical values or the like may be displayed at the place of the warning display. This makes it easier to determine where to sprinkle water on the work site or where to compact it. Further, the information obtained by the arithmetic processing unit 23 (moisture excess / deficiency recognition means) is transmitted to a compaction machine such as a roller or a sprinkler, and the compaction machine is driven at a portion where the moisture is excessive, or the moisture is released. It may be configured to sprinkle water on the sprinkler at the missing part. As a result, it is possible to automatically adjust the water content to an appropriate level in the entire work site, and it is possible to reduce human error.

Further, as described above, when the measuring device 10 can measure one or more types selected from the group consisting of pH, temperature, chloride ion pressure, and Z-axis displacement, the arithmetic processing unit 23 However, this information may be combined with the water content information to determine the excess or deficiency of water content, freezing of the embankment, mixing of seawater into the embankment, and / or the degree of compaction of the embankment. Further, the determination result may be configured so that an operator or the like can confirm it on the display screen DP of the display unit 24.

As described above, according to the present embodiment, the measuring device 10 measures the water content of the embankment W and the embankment portion 12 arranged in the embankment W so as to be embedded in the embankment W. A sensor unit 13 and a first communication unit 15 having a function of communicating with the outside are provided. Thereby, the water content of the embankment W can be confirmed by using the information processing device 20 or the like configured to be able to communicate with the first communication unit 15. That is, the water content of the embankment can be easily measured without digging up the embankment W and putting it in a constant temperature drying furnace.

<Second Embodiment>
13, FIG. 15, and FIG. 17 show an example of the measuring device of this embodiment. As shown in FIGS. 13, 15, and 17, the present embodiment is characterized in that a display unit is provided in the measuring device so that the measurement of the water content and the like can be completed by the measuring device. There is. In the present embodiment, the components common to the first embodiment may be designated by a common reference numeral and the description thereof may be omitted.

Specifically, the measuring device 40 shown in FIG. 13 is provided with a display unit 43 for displaying the amount of water on the surface of the main body unit 11. Further, as shown in FIG. 14, the arithmetic processing unit 23 is provided instead of the driver 16. That is, the measuring device 40 has an embedded unit 12, a sensor unit 13, a first communication unit 15, a memory 17, and a power supply unit 18 as components common to the first embodiment, and is additionally provided. As a configuration, an arithmetic processing unit 41 and a display unit 43 are provided. Then, for example, the first communication unit 15, the memory 17, the power supply unit 18, and the arithmetic processing unit 41 are built in the main body unit 11. In addition, also in FIGS. 15 and 17, the block configuration of FIG. 14 can be adopted.

The arithmetic processing unit 41 can be realized by, for example, a microcomputer, and has a function of performing arithmetic processing on the result measured by the sensor unit 13 and controlling the display of the display unit 43. For example, in FIG. 14, the arithmetic processing unit 41 corresponds to the information acquisition unit, and the memory 17 corresponds to the storage unit. Further, for example, in FIG. 2, the driver 15 corresponds to the information acquisition unit, and the memory 17 corresponds to the storage unit. Also in FIG. 14, the memory 17 may be built in the measuring device 10 at all times, or may be detachably configured in the measuring device 10.

The display unit 43 has a function of displaying information such as the amount of water under the control of the arithmetic processing unit 41. The display mode of the display unit 43 is not particularly limited, but for example, as shown in FIG. 13A, the water content itself may be displayed, and as shown in FIG. 13B, the water content is specified. The display mode may be such that it is possible to identify whether or not it is within the range. Specifically, in FIG. 13B, it is possible to determine whether or not the water content is within the specified range by lighting the lamp. In this way, by configuring the measuring device 40 so that the measurement of the water content and the like can be completed, the handling at the time of use becomes easy.

15 and 17 are characterized in that the measuring device 60 is configured to be easily inserted and removed from the embankment W.

Specifically, in FIG. 15, in addition to the measuring device 60, a jig 70 for installing the measuring device 60 is provided. The jig 70 includes a handle portion 71 for manually pushing the embedded portion 12 (for example, an electrode) into the embankment W, and a footrest portion 72 for stepping on the ground with a foot. , A connecting portion 73 for connecting the handle portion and the footrest portion 72 is provided.

The handle portion 71 is a rod-shaped body extending in the horizontal direction, and the main body portion 11 of the measuring device 60 is attached to the central portion in the longitudinal direction thereof. Further, grip portions 71a for the operator to grip are provided at both ends of the handle portion 71 in the longitudinal direction. The footrest portion 72 is a rod-shaped body that extends parallel to the handle portion 71 (horizontally), and the handle portion 71 is the length of the lower body of a person so that the operator can easily rest his / her foot while holding the handle portion 71. It is provided so far apart. Then, the central portions of the handle portion 71 and the footrest portion 72 in the longitudinal direction are connected to each other by a rod-shaped connecting portion 73. Further, an embedded portion 12 composed of a pair of rod-shaped members (for example, electrodes) formed so as to extend downward is attached to the lower center side (filling W side) in the longitudinal direction of the footrest portion 72. There is. With such a configuration, the operator can grip the handle portion 71 or put his / her foot on the footrest portion 72 to apply force and insert the embedded portion 12 (for example, an electrode) into the embankment W. When pulling out, the operator can easily pull out by lifting the handle portion 71.

A display unit 43 and an input operation unit 48 are provided on the surface of the main body portion 11. The display unit 43 has, for example, a liquid crystal display screen, and can display measurement results such as the amount of water. The display items of the display unit 43 are not limited to the measurement results, and may be configured so that, for example, an operation menu or the like can be displayed in conjunction with the input operation received by the input operation unit 48. The form of the input operation unit 48 is not particularly limited, but is, for example, a push button type, which is used for changing the display content of the display unit 43 and making various settings of the measuring device 60.

The measuring device 60 of FIG. 15 may be used alone, or in cooperation with the information processing device 20 as in the first embodiment described above, the information processing device 20 may be subjected to the water content of the measuring device 60 and the like. The measurement result may be displayed. Further, although specific illustration is omitted, a plurality of measuring devices 60 may be used in combination.

The measuring device 60 of FIG. 17 has a different mounting position of the main body 11 from the measuring device 60 of FIG. 15, and specifically, the main body 11 is mounted at the center of the footrest 72.

As shown in FIG. 18B, the measuring device may be configured so that the jig can be attached and detached. As a result, after the measuring device is installed on the embankment, only the jig can be removed and attached to another measuring device, and a plurality of measuring devices 60 can be installed on the embankment W by one jig 70. As shown in FIG. 18, the measuring device 60 may operate in cooperation with the information processing device 20 as in the cases of FIGS. 15 and 16.

As described above, according to the present embodiment, the measuring device 10 is provided with the embedded unit 12 and the sensor unit 13 common to those of the first embodiment, and is provided with a display unit 43 for displaying the measurement result of the water content and the like. It is provided. As a result, the water content of the embankment can be easily measured without digging up the embankment W and putting it in the microwave oven.

Although the embodiment of the present invention has been described above, various modifications can be made.

For example, in the above-described embodiment, the configurations described in each embodiment and each drawing can be appropriately combined. For example, the measuring device 60 having the display function described in the second embodiment may be configured to be capable of position recognition as shown in FIG.

Further, for example, as another aspect using the flying object F, for example, it may be configured as illustrated in FIG. In FIG. 19, for example, a plurality of measuring devices 10 are mounted on the flying object F, and the measuring devices 10 are fired from the flying object F toward the embankment W so that the embankment W is embedded with the embedded portion 12. .. In this case, it is preferable that the tip of the embedded portion 12 of each measuring device 10 is formed as thin as a needle. Further, in order to facilitate the embedding portion 12 in the embankment W, (1) the measuring device 10 may be provided with a propulsion device (not shown), or (2) the measuring device 10 may be provided with a tail wing. , (3) The projectile F may be provided with a launching device (not shown), or (4) the tip of the measuring device 10 may be made of a heavy material. Configurations other than the above can be realized with the same configurations as those of the first embodiment and / or the second embodiment described above.

For example, after the embedded portion 12 of the measuring device 10 is embedded in the embankment W, the measuring device 10 may transmit information such as moisture information to the flying object F. Further, the camera F1 mounted on the flying object F may be used to recognize the position where the measuring device 10 is embedded. With such a configuration, the operator can comprehensively obtain information on the water content of the embankment simply by flying the projectile.

In addition, the measuring devices 10, 40, and 60 of each of the above embodiments may have a function of preventing forgetting to pull out. Specifically, for example, the measuring devices 10 may be individually identifiable with characters, symbols, patterns, etc., and for example, even after the measuring devices 10 are pulled out, the measuring devices 10 and / or information processing may be performed. If the device 20 is configured to be communicable and the number of sensors at hand is insufficient, the measuring device 10 and / or the information processing device 20 may issue a sound or visual warning. Further, a mechanism capable of notifying the measuring device 10 embedded in the embankment W by sound or visually recognizable means may be provided.

The present invention is extremely useful because it is possible to easily measure the water content of the embankment.

A Moisture content measurement system 10, 40, 60 Measuring device 12 Embedded unit 13 Sensor unit 15 1st communication unit 20 Information processing device 21 2nd communication unit 24,43 Display unit 19 Position recognition unit W embankment

Claims (12)

It is a water content measurement system for measuring the water content of the embankment.
A measuring device including an embedded part that can be embedded in the embankment, a sensor part that is arranged in the embankment and measures the water content of the surrounding embankment, and a first communication part that has a function of communicating with the outside. When,
It is provided with an information processing device including a second communication unit that receives water content information which is information on the water content measured by the sensor unit from the measuring device, and a display unit that displays the water content information. A featured filling water content measurement system. The measuring device includes a position recognition unit that measures the position information of the own machine.
The information processing device has image information of a work site where a filling is formed, receives the position information of the measuring device in addition to the water content information from the measuring device, and receives the position information of the measuring device based on the position information. The installation position of the measuring device is associated with the image information, the image information is displayed on the display unit, and the water content information of the measuring device is displayed at the installation position of the measuring device on the image information. The water content measuring system for filling according to claim 1. The water content measuring system includes a plurality of the measuring devices.
The water content measuring system for an embankment according to claim 1, wherein the measuring devices are configured to be capable of communicating with each other via the first communication unit. The water content of the embankment according to claim 3, wherein the measuring device includes a position recognition unit that measures the position of the own machine based on the intensity and phase of radio waves received from the other measuring device. Quantity measurement system. The measuring device is configured to be able to receive radio waves from a reference sign that serves as a reference for identifying the position of the own device via the first communication unit, and has the strength of radio waves transmitted to and received from the reference sign. The water content measuring system for an embankment according to claim 1, further comprising a position recognition unit that measures the position of the own machine based on the phase. The embedded portion and the sensor portion are integrally configured.
The embankment according to any one of claims 1 to 5, wherein the sensor portion is provided at a position where the embedded portion is arranged in the embankment when the embedded portion is embedded in the embankment. Moisture measurement system. The sensor unit is one or more types of water content sensors selected from the group consisting of electric resistance type, capacitance type, microwave type, near infrared type, neutron type, heat probe type and matrix potential type. The water content measuring system for a filling according to any one of claims 1 to 6, wherein the system comprises. The sensor unit is configured to be capable of measuring one or more types selected from the group consisting of pH, temperature, chloride ion, pressure, and Z-axis displacement, in addition to the water content of the filling. The water content measuring system for filling according to any one of claims 1 to 7, wherein the system comprises. In the measuring device, a striking surface for driving the embedded portion into the embankment by using a striking tool is formed at an end portion of the embedded portion in a direction opposite to the embankment direction. The embankment water content measuring system according to any one of claims 1 to 8, wherein the embankment has a water content. It is a water content measuring device for measuring the water content of the embankment.
An embedded part that can be embedded in the embankment,
A sensor unit that is placed inside the embankment and measures the water content of the surrounding embankment,
An embankment water content measuring device including an information acquisition unit that acquires and holds information on the water content measured by the sensor unit. The embankment according to claim 10, further comprising a storage unit for storing information on the amount of water acquired by the information acquisition unit, which is configured to be detachable from the water content measuring device. Moisture content measuring device. The water content measuring device for an embankment according to claim 11, further comprising a display unit for displaying the water content measured by the sensor unit.

Images