Soil management device and soil management method

Abstract

To provide a soil property management device and a soil property management method which allow a user to easily grasp a compaction degree of soil for each point.SOLUTION: A soil property management device 1A comprises: a display unit 20A which displays information on a photographed image 22 of a ground surface S; and a position specification unit 30 which specifies a position of the display unit 20A. Since the display unit 20A displays hues 24 indicating compaction degrees for a plurality of points p of the ground surface S in a superimposed manner in the photographed image 22 on the basis of the position P of the display unit 20A specified by the position specification unit 30 and information including a measurement result of the compaction degree of soil E of the ground surface S for the plurality of points p of the ground surface S, a user can easily grasp the compaction degree of the soil E for each point p.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a soil management device and a soil management method. [Background technology]

[0002] In order to manage the soil quality of compacted embankments, a technique has been proposed for measuring the degree of compaction of the ground soil at multiple points on the ground. For example, Patent Document 1 discloses a technique for recording the movement of a mobile object equipped with an RI sensor capable of measuring the density or moisture of the ground soil, as well as the current position of the mobile object and the measurement values ​​of the RI sensor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-67297 Summary of the Invention [Problem to be solved by the invention]

[0004] While the above-mentioned technology can measure the degree of soil compaction at each point, it is not easy to grasp the degree of soil compaction at each point from the soil compaction degree displayed on a bird's-eye view like a map. Considering workability at construction sites, it is desirable to be able to grasp the degree of soil compaction at each point at a glance.

[0005] Therefore, an object of the present invention is to provide a soil management device and a soil management method that make it easy to grasp the degree of soil compaction at each point. [Means for solving the problem]

[0006] The gist of the present invention is as follows.

[0007] [1] A display unit that displays information on either a captured image of the ground or a field of view that includes the ground, and a position specifying unit that specifies the position of the display unit, wherein the display unit displays a color indicating the degree of compaction of each of a plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit specified by the position specifying unit and information including measurement results of the degree of compaction of the soil on the ground at each of a plurality of points on the ground, and the position specifying unit specifies the position of the display unit from the position in the captured image of any sign that appears in the captured image. The display unit superimposes and displays text information indicating an average value of the compaction degree of the ground and the color indicating the compaction degree for each of the points on either the captured image or the field of view, based on information including the measurement results of the compaction degree for each of the points. Soil management equipment.

[0008] According to this configuration, in a soil quality management device equipped with a display unit that displays information on either an image of the ground or a field of view that includes the ground, and a position identification unit that identifies the position of the display unit, the display unit superimposes colors indicating the degree of compaction of the ground at each of multiple points on the ground onto either the image or the field of view based on the position of the display unit identified by the position identification unit and information including measurement results of the degree of compaction of the soil on the ground at each of multiple points on the ground, making it easy to grasp the degree of compaction of the soil at each point.

[0009] [2] The display unit of the soil management device described in [1] displays the color indicating the degree of compaction for each point by superimposing it as a scattered marker on either the captured image or the field of view.

[0010] With this configuration, the display unit displays the degree of compaction for each point by superimposing scattered markers on either the captured image or the field of view, so that the entire captured image of the ground or the field of view including the ground is not covered by the markers. This makes it easier to grasp the position of each point on the ground in the captured image of the ground or the field of view including the ground, and makes it easier to grasp the degree of compaction for each point.

[0011] [3] The soil management device described in [2], wherein the display unit is capable of freely changing any of the size of the marker, the shape of the marker, and the color of the marker corresponding to the degree of compaction.

[0012] With this configuration, the display unit can freely change the size of the marker, the shape of the marker, or the color of the marker corresponding to the degree of compaction, making it easy to display the degree of compaction of the soil at each point on the ground depending on the situation, and making it easier to understand the degree of compaction of the soil at each point.

[0013] [4] A soil management device described in any one of [1] to [3], wherein the display unit superimposes and displays, on either the captured image or the field of view, text information indicating the average value of the compaction degree of the ground and the color indicating the compaction degree for each point, while switching between the text information and the color indicating the compaction degree for each point, based on information including the measurement results of the compaction degree for each point.

[0014] According to this configuration, the display unit superimposes and switches between text information indicating the average level of compaction of the ground and colors indicating the level of compaction at each point on either the captured image or the field of view based on information including the measurement results of the level of compaction at each point.This allows the display to be switched between cases where, for example, you want to know the level of compaction of the entire ground for inspection, etc., and cases where you want to know the level of compaction at each of multiple points on the ground in order to compact the soil on the ground without any excess or deficiency.

[0015] [5] A soil management device described in any one of [1] to [4], wherein the display unit superimposes and displays, on either the captured image or the field of view, a route from the position of the display unit identified by the position identification unit to the point where compaction of the soil on the ground should be performed, based on information including the measurement results of the degree of compaction for each point.

[0016] According to this configuration, the display unit displays, on either the captured image or the field of view, a superimposed path from the position of the display unit identified by the position identification unit to the point where the soil on the ground should be compacted, based on information including the measurement results of the degree of compaction at each point, thereby improving the efficiency of compacting the soil on the ground so that it is neither too much nor too little.

[0017] [6] A compaction degree measuring device includes a measuring step in which the compaction degree of the soil on the ground at each of a plurality of points on the ground is measured; a position specifying step in which a position specifying unit of the soil management device specifies the position of a display unit of the soil management device; and a display step in which the display unit displays information on either a captured image of the ground or a field of view including the ground, wherein in the display step, the display unit displays a color indicating the compaction degree at each of the plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit specified in the position specifying step and information including the measurement results of the compaction degree at each of the points measured in the measurement step, and the position specifying unit specifies the position of the display unit from the position in the captured image of any mark that appears in the captured image. and in the display step, the display unit superimposes and displays, on either the captured image or the field of view, text information indicating an average value of the degree of compaction of the ground and the color indicating the degree of compaction for each of the points, while switching between the text information and the color indicating the degree of compaction for each of the points, based on information including the measurement results of the degree of compaction for each of the points. Soil management methods.

[0018] [7] The soil management method described in [6], further comprising a compaction step in which a compaction machine compacts the soil of the ground before the measurement step.

[0019] According to this configuration, after the compaction machine compacts the soil on the ground in a compaction process before the measurement process, in the display process the display unit superimposes colors indicating the degree of compaction at each of multiple points on the ground on either the captured image or the field of view, making it easy to grasp the effect of the soil compaction process at each point.

[0020] [8] A soil management method as described in [6] or [7], further comprising: in the display step, the display unit superimposes and displays a route from the position of the display unit identified in the position identification step to the point where compaction of the soil on the ground should be performed on either the captured image or the field of view based on information including the measurement results of the degree of compaction for each point measured in the measurement step; and a re-compaction step in which a compaction machine re-compacts the soil on the ground based on the route displayed in the display step.

[0021] According to this configuration, in the display process, the display unit displays a route from the position of the display unit identified in the position identification process to the point where the ground soil should be compacted, superimposed on either the captured image or the field of view, based on information including the measurement results of the degree of compaction for each point measured in the measurement process, and in the re-compaction process, the compaction machine compacts the ground soil again based on the route displayed in the display process, thereby improving the efficiency of compacting the ground soil without any excess or deficiency.

[0022] [9] A soil management method according to any one of [6] to [8], wherein in the measuring step, the compaction degree measuring device brings a pair of capacitor electrodes, each consisting of a dielectric facing the ground and a conductor connected to the dielectric, close to the ground as a pair of current electrodes, and applies an AC voltage between the pair of current electrodes to pass an AC current through the soil of the ground, while bringing a pair of capacitor electrodes, each consisting of a dielectric facing the ground and a conductor connected to the dielectric, close to the ground as a pair of potential electrodes, and measures the potential between the pair of potential electrodes, and measures the electrical resistance of the soil of the ground based on the AC current passed through the soil of the ground by the current electrodes and the potential between the potential electrodes measured by the potential electrodes, and measures the compaction degree at each point based on the relationship between the electrical resistance of the soil of the ground and either the dry density or the wet density of the soil of the ground.

[0023] In conventional techniques for measuring the degree of compaction of soil by measuring the electrical resistance of the soil, when the compacted ground becomes dry or uneven, the contact area between the electrode and the ground decreases, causing the electrical resistance of the soil to be measured higher and making it impossible to accurately obtain the dry density of the soil. On the other hand, with the above configuration, in the measurement process, the compaction degree measuring device measures the electrical resistance of the soil using a current electrode and a potential electrode, which are capacitor electrodes, and measures the degree of compaction at each point based on the relationship between the electrical resistance of the soil and either the dry density or wet density of the soil. Therefore, it is possible to measure the degree of compaction at each point while reducing the effects of dryness and unevenness of the ground. [Effects of the Invention]

[0024] According to the soil management device and soil management method of the present invention, it is easy to grasp the degree of soil compaction at each point. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a block diagram showing the configuration of a soil management device according to a first embodiment. [Figure 2] 1 is a flowchart showing steps of a soil management method according to a first embodiment. [Figure 3] (A) is a plan view showing a compaction machine and a compaction degree measuring device, and (B) is a schematic diagram showing the principle of the compaction degree measuring device of (A). [Figure 4] FIG. 10 is a diagram showing a captured image of the ground displayed on a display screen by a display unit in the first embodiment, and text information indicating the average value of the soil compaction degree of the ground displayed superimposed on the captured image. [Figure 5] FIG. 10 is a diagram showing an image of the ground displayed on a display screen by a display unit in the first embodiment, and colors indicating the degree of compaction at each of a plurality of points on the ground that are displayed superimposed on the image. [Figure 6] FIG. 10 is a block diagram showing the configuration of a soil management device according to a second embodiment. [Figure 7] FIG. 11 is a diagram showing a field of view including the ground and text information showing the average value of the ground soil compaction level displayed superimposed on the field of view by the display unit in the second embodiment. [Figure 8] FIG. 10 is a diagram showing a field of view including the ground and colors indicating the degree of compaction at each of a plurality of points on the ground that are displayed superimposed on the field of view in the second embodiment. [Figure 9] FIG. 10 is a diagram showing colors indicating the degree of compaction at each of a number of points on the ground, superimposed on a plan view of the ground. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, embodiments of a soil management device and a soil management method according to the present invention will be described in detail with reference to the drawings. The soil management device and the soil management method according to the first embodiment of the present invention are intended to measure the degree of compaction of the ground after it has been compacted by a compaction machine such as a road roller during an earthwork construction project, for example, and to accurately grasp the degree of compaction of the soil at multiple points on the ground at a glance, thereby confirming the effectiveness of the compaction by the compaction machine.

[0027] 1, the soil management device 1A of this embodiment includes an imaging unit 10, a display unit 20A, a position identification unit 30, and an operation input reception unit 40. Specifically, the soil management device 1A is a general-purpose mobile information terminal such as a smartphone or tablet terminal carried by a user such as an earthwork worker. Any mobile information terminal can be used as the soil management device 1A as long as it has the function of capturing an image of the ground in front of the user and displaying the captured image of the ground toward the user, and the function of identifying the position of the soil management device 1A.

[0028] The soil management device 1A is an electronic computer having a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The soil management device 1A performs the operations described below as the soil management device 1A by installing an application program that causes the electronic computer to perform the operations described below on a general-purpose mobile information terminal such as a smartphone or tablet terminal.

[0029] The imaging unit 10 captures an image of the ground, such as the ground, in front of the user. Specifically, the imaging unit 10 is a camera built into the back of a smartphone, tablet terminal, or the like. The display unit 20A displays information on the captured image of the ground, and as will be described later, superimposes colors indicating the degree of compaction at each of multiple points on the ground. Specifically, the display unit 20A is a display placed in front of the smartphone, tablet terminal, or the like, and hardware and software that control the display.

[0030] The position identifying unit 30 identifies the position of the display unit 20A, i.e., the soil management device 1A including the imaging unit 10. Specifically, the position identifying unit 30 is a device that performs GNSS (Global Navigation Satellite System) surveying and is built into a smartphone, tablet terminal, or the like. The position of the display unit 20A identified by the position identifying unit 30 includes three-dimensional coordinate values ​​of the display unit 20A.

[0031] The position identifying unit 30 may identify the position of the display unit 20A by an automatic tracking TS (Total Station) using an optical surveying function, or the like. The position identifying unit 30 may also identify the position of the display unit 20A from the position in the captured image of any sign or the like that appears in the captured image by the imaging unit 10. By having the position identifying unit 30 identify the position of the display unit 20A by a method other than such GNSS surveying, the soil management device 1A can be applied, for example, even when checking the effect of compaction of underground ground where GNSS surveying is not possible.

[0032] The operation input acceptance unit 40 accepts operation inputs from a user. Specifically, the operation input acceptance unit 40 is a touch screen of a smartphone, a tablet terminal, or the like. In this embodiment, the touch screen that is the operation input acceptance unit 40 also serves as the display screen of the display unit 20A.

[0033] The soil quality management method according to the first embodiment will be described below. As shown in FIGS. 2 and 3(A), a compaction process (S1) is carried out before the measurement process (S2), in which a compaction machine 100 compacts the ground soil. The ground soil is, for example, an embankment in an earthwork project. The compaction machine 100 compacts the ground soil by applying pressure to the ground. Specifically, the compaction machine 100 is a roller-type compaction machine such as a road roller, tire roller, tamping roller, vibratory roller, macadam roller, combined roller, or hand-guided roller. The compaction machine 100 is capable of self-propelled on the ground. The compaction machine 100 may also be a flat-plate type compaction machine such as a plate compactor or tamper.

[0034] After the compaction process, a measurement process is carried out in which the compaction degree measurement device 200 measures the degree of compaction of the soil at each of a plurality of points on the ground (S2). As shown in Figure 3(A), the compaction degree measurement device 200 is towed by the compaction machine 100 that performs the compaction process, and is dragged over the ground while performing the measurement process. Therefore, in this embodiment, the measurement process can be carried out immediately after the compaction process.

[0035] As shown in Figures 3(A) and 3(B), in the measurement process, the compaction degree measuring device 200 brings a pair of capacitor electrodes 120, each consisting of a dielectric 124 facing the ground surface S and a conductor 123 connected to the dielectric 124, close to the ground surface S as a pair of current electrodes 121. The conductor 123 is a flat plate electrode made of a conductive metal. The dielectric 124 is a plate-shaped member made of a common synthetic resin.

[0036] Since the dielectric 124 is in direct contact with the ground surface S and is dragged over the ground surface S, it is preferable that the dielectric 124 is made of a material that can withstand such conditions. The dielectric 124 is preferably made of, for example, high-density polyethylene, hard polyurethane, ABS (Acrylonitrilebutadienestyrene) resin, or the like. The compaction degree measuring device 200 applies an AC voltage from an AC power source 125 between a pair of current electrodes 121, thereby passing an AC current through the soil E of the ground surface S.

[0037] In other words, when a voltage is applied to conductors 123 of a pair of current electrodes 121 that are not in contact with the ground S, charge accumulates between conductors 123 and earth E of the ground S, and current electrode 121 becomes a capacitor. If the polarity of the voltage is switched by AC power supply 125 before current electrode 121, which has become a capacitor, is completely charged or discharged, an AC current will continuously flow through earth E, which has a resistance value.

[0038] Compaction degree measuring device 200 passes an AC current through soil E of ground S between a pair of current electrodes 121, and brings a pair of capacitor electrodes 120, each consisting of a dielectric 124 facing ground S and a conductor 123 connected to dielectric 124, close to ground S as a pair of potential electrodes 122. Compaction degree measuring device 200 passes an AC current through soil E of ground S between the pair of current electrodes 121, and measures the potential between the pair of potential electrodes 122 with an electrometer 126. In other words, the electrometer 126 measures the potential of the pair of potential electrodes 122, which have become capacitors like the current electrodes 121.

[0039] The compaction degree measuring device 200 measures the electrical resistance of the soil E of the ground surface S using an AC current passed through the soil E of the ground surface S by an AC power supply 125 and a current electrode 121, and the potential between the potential electrodes 122 measured by an electrometer 126 and a potential electrode 122. The compaction degree measuring device 200 measures the degree of compaction at each point based on the relationship between the electrical resistance of the soil E of the ground surface S and either the dry density or the wet density of the soil E of the ground surface S.

[0040] It is known that there is a correlation between the electrical resistivity of soil E and its dry density. The same is true for the correlation between the electrical resistivity of soil E and its wet density. Therefore, the dry and wet densities of soil E can be derived based on the electrical resistivity of soil E. The degree of compaction at each point can be evaluated using the dry and wet densities of soil E. The degree of compaction is expressed directly by either the dry density or the wet density value. The degree of compaction can also be expressed by the percentage that the measured dry density or wet density corresponds to of either the maximum dry density or maximum wet density of that soil E.

[0041] As shown in Figure 2, a position identifying step is performed in which the position identifying unit 30 of the soil management device 1A carried by the user identifies the position of the display unit 20A of the soil management device 1A (S3). The user in this case is, for example, a worker standing on the ground surface S on which the above-mentioned compaction and measurement steps have been carried out, or a driver operating the compaction machine 100 traveling on the ground surface S on which the above-mentioned compaction and measurement steps have been carried out. The soil management device 1A may also be fixed to the driver's seat of the compaction machine 100. In this case, the position identifying unit 30 identifies the position of the display unit 20A fixed to the driver's seat of the compaction machine 100.

[0042] 2, 4, and 5, a display step is carried out in which the display unit 20A displays information on the captured image 22 of the ground surface S shown on the display screen 21 (S4). When it is desired to grasp the overall degree of compaction of the ground surface S for an inspection or the like, as shown in FIG. 4, in the display step, the display unit 20A displays text information 23 indicating the average value of the degree of compaction of the ground surface S by superimposing it on the captured image 22 on the display screen 21, based on the position P of the display unit 20A identified in the position identification step and information including the measurement results of the degree of compaction for each of a plurality of points p of the ground surface S measured in the measurement step. In the example of FIG. 4, the average value of the dry density is displayed as the average value of the degree of compaction.

[0043] On the other hand, if it is desired to grasp the degree of compaction at each of multiple points p on the ground surface S in order to compact the soil E on the ground surface S without excess or deficiency, as shown in Figure 5, in the display process, the display unit 20A superimposes and displays a color 24 indicating the degree of compaction at each of multiple points p on the ground surface S on the captured image 22 on the display screen 21 based on the position P of the display unit 20A identified by the position identification unit 30 in the position identification process and information including the measurement results of the degree of compaction of the soil E on the ground surface S at each of multiple points p on the ground surface S measured by the compaction degree measuring device 200 in the measurement process.

[0044] That is, based on information including the measurement results of the degree of compaction for each point p, the display unit 20A switches between and superimposes on the captured image 22 on the display screen 21 text information 23 indicating the average value of the degree of compaction of the ground surface S and a color 24 indicating the degree of compaction for each point p. Switching between the text information 23 indicating the average value of the degree of compaction and the color 24 indicating the degree of compaction for each point p is performed in response to an operation input received by the operation input receiving unit 40. The information including the measurement results of the degree of compaction for each point p includes the two-dimensional coordinate values ​​(latitude and longitude) of the point p and the degree of compaction associated with the two-dimensional coordinate values.

[0045] In displaying the captured image 22 on the display screen 21, the display unit 20A calculates the two-dimensional coordinate value of the point p from information including the measurement results of the degree of compaction for each point p. The display unit 20A calculates the three-dimensional coordinate value of the point p, with the position P of the display unit 20A identified by the position identification unit 30 as the origin, from the two-dimensional coordinate value (latitude and longitude) of the point p. The display unit 20A calculates the position of the point p in the captured image 22 from the position P of the display unit 20A and the three-dimensional coordinate value of the point p. The display unit 20A displays a marker of color 24 at the calculated position of the point p in the captured image 22, based on the information including the measurement results of the degree of compaction for each point p.

[0046] The display unit 20A plots and displays the measurement results of the degree of compaction linked to the two-dimensional coordinate values ​​(latitude and longitude) of point p at the actual three-dimensional position in the captured image 22 viewed from position P on the display unit 20A. If the user carrying the soil management device 1A moves, the display unit 20A follows the movement and continues to plot a color 24 at the actual three-dimensional position in the captured image 22 viewed from position P on the display unit 20A.

[0047] The display unit 20A displays the color 24 indicating the degree of compaction for each point p by superimposing it as scattered markers spaced apart from each other on the captured image 22 on the display screen 21. In this embodiment, for example, blue markers to red markers are displayed in order from lowest to highest compaction degree. Alternatively, for example, red markers to blue markers may be displayed in order from lowest to highest compaction degree. In the example of FIG. 5, the markers of color 24 are square-shaped, but the markers of color 24 may also be circular, oval, polygonal other than rectangular, or other shapes.

[0048] The display unit 20A can freely change any of the size of the marker of color 24, the shape of the marker of color 24, and the color of the marker of color 24 corresponding to the degree of compaction. The size, shape, and color corresponding to the degree of compaction of the marker of color 24 are changed in response to an operation input received by the operation input receiving unit 40. Furthermore, when a marker of color 24 displayed on the captured image 22 displayed on the touch screen (display screen 21) that is the operation input receiving unit 40 is clicked, text information 25 regarding the degree of compaction at point p corresponding to the marker of color 24 is displayed. Note that the display unit 20A may also display the color 24 in the form of a contour diagram that continuously covers, for example, 10% or more of the range of the captured image 22.

[0049] In the display step, the display unit 20A displays a route 26 from the position P of the display unit 20A identified in the position identification step to the point p where compaction of the soil E on the ground surface S should be performed, superimposed on the captured image 22 on the display screen 21, based on information including the measurement results of the degree of compaction for each point p measured in the measurement step. The display unit 20A can, for example, calculate candidate routes connecting all points p where compaction should be performed from the position P, and display the candidate route with the shortest distance as the final route 26.

[0050] The range in which the route 26 extends may include a point p where compaction should not be performed. In the example of Fig. 5, the display unit 20A suspends the display of the route 26 for a point p in the range in which the route 26 extends where compaction should not be performed. The display unit 20A may display a predetermined icon or the like for a point p in the range in which the route 26 extends where compaction should not be performed. In this embodiment, the route 26 extending from the outside to the inside of the captured image 22 on the display screen 21 and the route 26 extending from the inside to the outside of the captured image 22 on the display screen 21 are also displayed.

[0051] 2, when the degree of compaction is insufficient in the captured image 22 on the display screen 21 during the display process and a point p where compaction should be performed is displayed (S5), a re-compaction process is carried out in which the compaction machine 100 again compacts the soil E of the ground surface S based on the route 26 displayed during the display process (S6). Note that, during the re-compaction process, for points p within the range of the route 26 where compaction should not be performed, over-compaction can be prevented by, for example, running the compaction machine 100 along the route 26 while stopping the operation of the vibrating roller.

[0052] The soil management device 1A of this embodiment may be placed in the driver's seat of the compaction machine 100, and the display unit 20A may display the captured image 22 on the display screen 21, while displaying a plan view 50 on which a color 51 indicating the degree of compaction for each point p as shown in Figure 9 is superimposed on the display screen 21 or on a display separately installed in the driver's seat of the compaction machine 100. In other words, the driver operating the compaction machine 100 may check the plan view 50 for insufficient compaction points p, accurately identify the actual location of point p in the real world using the color 24 of the captured image 22, move to the insufficiently compacted point p, and compact point p.

[0053] In this embodiment, in a soil management device 1A equipped with a display unit 20A that displays information on an image 22 of the ground surface S and a position identification unit 30 that identifies the position of the display unit 20A, the display unit 20A displays a color 24 indicating the degree of compaction of each of multiple points p on the ground surface S superimposed on the image 22 based on the position P of the display unit 20A identified by the position identification unit 30 and information including measurement results of the degree of compaction of the soil E on the ground surface S at each of multiple points p on the ground surface S, making it easy to grasp the degree of compaction of the soil E at each point p.

[0054] That is, in this embodiment, projecting surface data of the measured compaction quality onto the real world leads to an accurate understanding of the compaction quality, and enables the quick identification of points p where compaction is insufficient, leading to improved work efficiency. When the user carrying the soil management device 1A moves, the display unit 20A follows the user's movement and continues to plot color 24 at the actual three-dimensional position in the captured image 22 viewed from position P on the display unit 20A, making it easy to go and compact points p where compaction is insufficient.

[0055] Furthermore, additional compaction of a point that is already sufficiently compacted can result in a decrease in density due to overcompaction, which can lead to a decrease in quality. In this embodiment, points p that are insufficiently compacted can be accurately identified, preventing the mistaken compaction of points p where the quality is satisfactory. This allows compaction and quality control to be achieved accurately at the same time.

[0056] Furthermore, according to this embodiment, the display unit 20A displays the colors 24 indicating the degree of compaction for each point p by superimposing them as scattered markers on the captured image 22, so the entire surface of the captured image 22 of the ground surface S is not covered by the markers. This makes it easy to grasp the position of each point p on the ground surface S in the captured image 22 of the ground surface S, and makes it even easier to grasp the degree of compaction of the soil E for each point p.

[0057] Furthermore, according to this embodiment, the display unit 20A can freely change any of the size of the marker, the shape of the marker, and the color of the marker corresponding to the degree of compaction, making it easy to display the degree of compaction of the soil E at each point p on the ground surface S depending on the situation, and making it easier to understand the degree of compaction of the soil E at each point p.

[0058] Furthermore, according to this embodiment, the display unit 20A switches between superimposing and displays text information 23 indicating the average value of the compaction degree of the ground surface S and a color 24 indicating the compaction degree for each point p on the captured image 22 based on information including the measurement results of the compaction degree for each point p. Therefore, the display can be switched between cases where, for example, one wishes to grasp the overall compaction degree of the ground surface S for inspection, etc., and cases where one wishes to grasp the compaction degree for each of multiple points p on the ground surface S in order to compact the soil E on the ground surface S without excess or deficiency.

[0059] Furthermore, according to this embodiment, after the compaction machine 100 compacts the soil E on the ground surface S in a compaction process prior to the measurement process, in the display process the display unit 20A displays a color 24 indicating the degree of compaction at each of a plurality of points p on the ground surface S superimposed on the captured image 22, making it easy to grasp the effect of the compaction process on the soil E at each point p. Furthermore, according to this embodiment, the compaction degree measuring device 200 is towed by the compaction machine 100 that performs the compaction process, and performs the measurement process while being dragged over the ground, after which the display process is performed, so that compaction, quality control of the compaction, and inspection of the compaction can be performed substantially simultaneously.

[0060] Furthermore, according to this embodiment, in the display process, the display unit 20A displays a route 26 superimposed on the captured image 22, based on information including the measurement results of the degree of compaction for each point p measured in the measurement process, from the position P of the display unit 20A identified in the position identification process to the point p where compaction of the soil E on the ground surface S should be performed, and in the re-compaction process, the compaction machine 100 again compacts the soil E on the ground surface S based on the route 26 displayed in the display process, thereby improving the efficiency of compacting the soil on the ground surface without excess or deficiency.

[0061] Furthermore, in this embodiment, the display unit 20A displays a message indicating that compaction should not be performed at points p in the range where the path 26 extends, where compaction should not be performed, thereby preventing excessive compaction. Also, in this embodiment, the path 26 from the outside to the inside of the captured image 22 on the display screen 21 and the path 26 from the inside to the outside of the captured image 22 on the display screen 21 are also displayed, making it easy to follow the path 26 over a wide range of the ground surface S.

[0062] In conventional techniques for measuring the degree of compaction of ground soil by measuring the electrical resistance of the soil, when the compacted ground becomes dry or uneven, the contact area between the electrode and the ground decreases, causing the electrical resistance of the ground soil to be measured higher and making it impossible to accurately obtain the dry density of the soil. On the other hand, in the measurement process of this embodiment, the compaction degree measuring device 200 measures the electrical resistance of the soil E of the ground S using the current electrode 121 and the potential electrode 122, which are capacitor electrodes 120, and measures the degree of compaction for each point p based on the relationship between the electrical resistance of the soil E of the ground S and either the dry density or the wet density of the soil E of the ground S. This makes it possible to measure the degree of compaction for each point p while reducing the effects of dryness and unevenness of the ground S.

[0063] Furthermore, the soil management device 1A and the soil management method of this embodiment can be realized by installing a predetermined application program on a general-purpose mobile information terminal such as a smartphone or tablet terminal, and therefore can be easily implemented.

[0064] A second embodiment of the present invention will now be described. As shown in FIG. 6, a soil management device 1B of this embodiment does not include an imaging unit 10, but includes a display unit 20B. As shown in FIGS. 7 and 8, the display unit 20B displays information in a field of view 27 that includes the ground surface S. Specifically, the display unit 20B of this embodiment is a glasses-type wearable device (smart glasses) worn by a user, similar to the first embodiment, that projects information into the user's field of view. Furthermore, the display unit 20B of this embodiment is a head-up display (HUD) that is installed in the driver's seat of the compaction machine 100 and projects information into the field of view ahead of the driver operating the compaction machine 100.

[0065] As in the first embodiment, the display unit 20B displays colors 24 indicating the degree of compaction at each of a plurality of points p on the ground surface S as scattered markers superimposed on the field of view 27. As in the first embodiment, the display unit 20B can freely change the size, shape, or color of the marker corresponding to the degree of compaction. In this embodiment, the operation input receiving unit 40 can be configured from a keyboard, a mouse, etc.

[0066] Furthermore, similar to the first embodiment, display unit 20B switches between superimposing and displays text information 23 indicating the average value of the compaction degree of the ground surface S and color 24 indicating the compaction degree for each point p in field of view 27. Similarly to the first embodiment, display unit 20B displays text information 25 relating to the compaction degree at point p corresponding to the marker of color 24 in field of view 27. Similarly to the first embodiment, display unit 20B also displays, superimposed on field of view 27, route 26 leading from position P of display unit 20B identified by position identification unit 30 to point p where compaction of soil E of the ground surface S should be performed.

[0067] In this embodiment, the soil management device 1B of this embodiment is placed in the driver's seat of the compaction machine 100, and the display unit 20B displays the above-mentioned text information 23, color 24, text information 25, and route 26 in the field of view 27, while displaying a plan view 50 on which a color 51 indicating the degree of compaction for each point p as shown in Figure 9 is superimposed in the field of view 27 or on a display separately installed in the driver's seat of the compaction machine 100. In other words, the driver operating the compaction machine 100 can check the plan view 50 for insufficient compaction points p, accurately identify the actual location of point p in the real world using the color 24 in the field of view 27, move to the insufficiently compacted point p, and compact point p.

[0068] According to this embodiment, the color 24 indicating the degree of compaction at each of a plurality of points p is projected directly into the user's field of vision 27, making it easy for the user to grasp the degree of compaction of the soil E at each point p. Furthermore, because the display unit 20B is a glasses-type wearable terminal worn by the user or a head-up display installed in the driver's seat of the compaction machine 100, the user does not need to hold the soil management device 1B in their own hands, allowing them to use both hands for work.

[0069] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be embodied in various forms. The soil E whose electrical resistivity is measured by the soil management device 1A and soil management method of the above embodiments includes not only ordinary soil E but also soil E in which cement is added to and mixed with sand and gravel obtained at a construction site in the CSG (Cemented Sand and Gravel) method, and soil in which ultra-hard concrete with a reduced amount of cement is spread and compacted with a vibrating roller or the like in the RCD (Roller Compacted Dam-Concrete) method. [Explanation of symbols]

[0070] 1A, 1B...soil management device, 10...imaging unit, 20A, 20B...display unit, 21...display screen, 22...captured image, 23...text information, 24...color, 25...text information, 26...route, 27...field of view, 30...position identification unit, 40...operation input reception unit, 50...plan view, 51...color, 100...compaction machine, 121...current electrode, 122...potential electrode, 123...conductor, 124...dielectric, 125...AC power supply, 126...potential meter, 200...compaction degree measuring device, S...ground, E...soil, P...position, p...point.

Claims

1. a display unit that displays a captured image of the ground and information in a field of view that includes the ground; a position specifying unit that specifies the position of the display unit; Equipped with the display unit displays a color indicating the degree of compaction of the ground at each of the plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit identified by the position identification unit and information including measurement results of the degree of compaction of the soil on the ground at each of the plurality of points on the ground, the position specifying unit specifies the position of the display unit from a position in the captured image of any sign that appears in the captured image; The display unit of the soil management device superimposes and switches between text information indicating the average value of the compaction degree of the ground and the color indicating the compaction degree for each point on either the captured image or the field of view based on information including the measurement results of the compaction degree for each point.

2. The soil management device according to claim 1 , wherein the display unit displays the color indicating the degree of compaction for each point by superimposing it as a scattered marker on either the captured image or the field of view.

3. The soil management device according to claim 2 , wherein the display unit is capable of freely changing any one of the size of the marker, the shape of the marker, and the color of the marker corresponding to the degree of compaction.

4. A soil management device as described in any one of claims 1 to 3, wherein the display unit displays a route from the position of the display unit identified by the position identification unit to the point where compaction of the soil on the ground should be carried out, superimposed on either the captured image or the field of view, based on information including the measurement results of the degree of compaction for each point.

5. a measuring step in which a compaction degree measuring device measures the compaction degree of soil on the ground at each of a plurality of points on the ground; a position specifying step in which a position specifying unit of the soil management device specifies the position of a display unit of the soil management device; a display step in which the display unit displays information in either the captured image of the ground or a field of view including the ground; Equipped with In the display step, the display unit displays a color indicating the degree of compaction at each of the plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit identified in the position identification step and information including the measurement results of the degree of compaction at each of the points measured in the measurement step, the position specifying unit specifies the position of the display unit from a position in the captured image of any sign that appears in the captured image; In the display process, the display unit superimposes and displays text information indicating the average value of the compaction degree of the ground and the color indicating the compaction degree for each point on either the captured image or the field of view, based on information including the measurement results of the compaction degree for each point, in a soil management method.

6. The soil management method according to claim 5 , further comprising a compaction step in which a compaction machine compacts the soil of the ground before the measuring step.

7. In the display step, the display unit displays a route from the position of the display unit identified in the position identification step to the point where compaction of the soil on the ground should be performed, superimposed on either the captured image or the field of view, based on information including the measurement results of the degree of compaction for each point measured in the measurement step, The soil management method according to claim 6, further comprising a re-compaction step in which a compaction machine recompacts the soil of the ground based on the path displayed in the display step.

8. In the measuring step, the compaction degree measuring device a pair of capacitor electrodes each consisting of a dielectric facing the ground and a conductor connected to the dielectric are brought close to the ground as a pair of current electrodes, and an AC voltage is applied between the pair of current electrodes to cause an AC current to flow through the soil of the ground, while a pair of capacitor electrodes each consisting of a dielectric facing the ground and a conductor connected to the dielectric are brought close to the ground as a pair of potential electrodes, and the potential between the pair of potential electrodes is measured, and the electrical resistance of the soil of the ground is measured from the AC current flowed through the soil of the ground by the current electrodes and the potential measured between the potential electrodes; The soil management method according to any one of claims 5 to 7, wherein the degree of compaction at each point is measured based on the relationship between the electrical resistivity of the soil of the ground and either the dry density or the wet density of the soil of the ground.

9. a display unit that displays a captured image of the ground and information in a field of view that includes the ground; a position specifying unit that specifies the position of the display unit; Equipped with the display unit displays a color indicating the degree of compaction of the ground at each of the plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit identified by the position identification unit and information including measurement results of the degree of compaction of the soil on the ground at each of the plurality of points on the ground, The display unit of the soil management device superimposes and switches between text information indicating the average value of the compaction degree of the ground and the color indicating the compaction degree for each point on either the captured image or the field of view based on information including the measurement results of the compaction degree for each point.

10. a measuring step in which a compaction degree measuring device measures the compaction degree of soil on the ground at each of a plurality of points on the ground; a position specifying step in which a position specifying unit of the soil management device specifies the position of a display unit of the soil management device; a display step in which the display unit displays information in either the captured image of the ground or a field of view including the ground; Equipped with In the display step, the display unit displays a color indicating the degree of compaction at each of the plurality of points on the ground by superimposing it on either the captured image or the field of view based on the position of the display unit identified in the position identification step and information including the measurement results of the degree of compaction at each of the points measured in the measurement step, A soil quality management method in which the display unit superimposes and displays, on either the captured image or the field of view, text information indicating the average value of the compaction degree of the ground and the color indicating the compaction degree for each point, while switching between them, based on information including the measurement results of the compaction degree for each point.

Images