Soil volume management device, soil volume management method, and soil volume management program

Abstract

Accurately measure the water content of the soil. [Solution] A soil volume management device for managing the amount of soil transported from a mud pressure shield tunneling machine through the tunnel to the launch shaft, comprising: a moisture content data acquisition unit that acquires moisture content data measured by a near-infrared moisture meter of soil discharged from a screw conveyor installed on the bulkhead of the mud pressure shield tunneling machine and transported by a belt conveyor; a soil discrimination unit that determines whether or not soil is being transported by a belt conveyor using images of the soil being transported by a camera and a soil discrimination model generated by learning the shape and color of the soil; a distance data acquisition unit that acquires distance data from a distance meter that measures the distance between the accumulation height of the soil being transported by the belt conveyor and a near-infrared moisture meter; and a moisture content data adoption unit that adopts moisture content data when the soil discrimination unit determines that soil is being transported and the distance measured by the distance meter is a predetermined distance.

Description

[Technical Field] 【0001】 This invention relates to an earthwork volume management device, an earthwork volume management method, and an earthwork volume management program. [Background technology] 【0002】 In the technical field described above, Patent Document 1 discloses a conveying flow rate measuring system in which a first roller-type weighing machine 8 having a roller 8a and a weighing scale 8b and a second roller-type weighing device 9 having a roller 9a and a weighing scale 9b are arranged so as to contact the lower surface of a conveying belt 4, wherein the weighing scales 8b and 9b detect the magnitude of the force pushing the rollers 8a and 9a downward, and the mass conveying flow rate and dry mass flow rate of the conveyed material 6 are determined based on the detected values ​​(paragraphs

[0032] to

[0034] of the same document, etc.). Furthermore, Patent Document 2 discloses the detection of the moisture content of solid matter using a moisture meter 110 provided in a soil separation device 10 (paragraphs

[0078] to

[0079] of the same document, etc.). In addition, Patent Document 3 discloses that an infrared moisture meter 6 is provided on the discharge conveyor so that the moisture content of the discharged solidified mud 11 can be checked (paragraph 6, bottom left, lines 3 to 5 of the same document, etc.). [Prior art documents] [Patent Documents] 【0003】 [Patent Document 1] Japanese Patent Publication No. 2017-78574 [Patent Document 2] Japanese Patent Publication No. 2001-193099 [Patent Document 3] Japanese Patent Application Publication No. 2-167996 [Overview of the project] [Problems that the invention aims to solve] 【0004】 However, the technologies described in Patent Documents 1 to 3 above cannot accurately measure the water content of soil because they measure the water content of soil even when there is no soil present on the conveyor belt, etc. [Means for solving the problem] 【0005】 To achieve the above objective, the earthwork volume management device according to the present invention is This is a soil volume management device that manages the amount of soil transported from the earth pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition unit acquires moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter. A soil discrimination unit determines whether or not the soil is being transported on the belt conveyor, using images of the soil being transported on the belt conveyor captured by a camera and a soil discrimination model generated by learning the shape and color of the soil. A distance data acquisition unit that acquires distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A water content data selection unit selects the water content data when the soil discrimination unit determines that soil is being transported and the distance measured by the distance meter is a predetermined distance, It is equipped. 【0006】 Furthermore, in order to achieve the above objective, the earthwork volume management method according to the present invention is A method for managing the volume of soil transported from a mud pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition step involves obtaining moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter, and A soil discrimination step that determines whether or not the soil is being transported by the belt conveyor, using images of the soil being transported by the belt conveyor captured by a camera and a soil discrimination model generated by learning the shape and color of the soil, A distance data acquisition step involves acquiring distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A moisture content data adoption step is performed in which, if it is determined in the soil identification step that soil is being transported and the distance measured by the distance meter is a predetermined distance, the moisture content data is adopted. Includes. 【0007】 Furthermore, in order to achieve the above objective, the earthwork volume management program according to the present invention is This is a soil volume management program that manages the amount of soil transported from the earth pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition step involves obtaining moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter, and A soil discrimination step that determines whether or not the soil is being transported by the belt conveyor, using images of the soil being transported by the belt conveyor captured by a camera and a soil discrimination model generated by learning the shape and color of the soil, A distance data acquisition step involves acquiring distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A moisture content data adoption step is performed in which, if it is determined in the soil identification step that soil is being transported and the distance measured by the distance meter is a predetermined distance, the moisture content data is adopted. Have the computer execute it. [Effects of the Invention] 【0008】 According to the present invention, the water content of soil and sediment can be accurately measured. 【Brief Description of the Drawings】 【0009】 [Figure 1] It is a diagram for explaining the outline of the soil quantity management device according to the first embodiment of the present invention. [Figure 2] It is a block diagram for explaining the configuration of the soil quantity management device according to the first embodiment of the present invention. [Figure 3] It is a diagram for explaining the hardware configuration of the soil quantity management device according to the first embodiment of the present invention. [Figure 4] It is a flowchart for explaining the processing procedure of the soil quantity management device according to the first embodiment of the present invention. [Figure 5] It is a diagram for explaining the outline of the soil quantity management device according to the first embodiment of the present invention. [Figure 6] It is a block diagram for explaining the configuration of the soil quantity management device according to the second embodiment of the present invention. [Figure 7] It is a diagram for explaining the hardware configuration of the soil quantity management device according to the second embodiment of the present invention. [Figure 8] It is a flowchart for explaining the processing procedure of the soil quantity management device according to the second embodiment of the present invention. [Figure 9] It is a diagram for explaining the outline of the soil quantity management device according to the third embodiment of the present invention. [Figure 10] It is a block diagram for explaining the configuration of the soil quantity management device according to the third embodiment of the present invention. [Figure 11] It is a diagram for explaining the hardware configuration of the soil quantity management device according to the third embodiment of the present invention. [Figure 12] It is a flowchart for explaining the processing procedure of the soil quantity management device according to the third embodiment of the present invention. 【Modes for Carrying Out the Invention】 【0010】 The embodiments for carrying out the present invention will be described in detail below with reference to the drawings. However, the configurations, numerical values, processing flow, functional elements, etc., described in the following embodiments are merely examples, and they can be freely modified or changed, and the technical scope of the present invention is not intended to be limited to the following description. 【0011】 [First Embodiment] A soil volume management device according to the first embodiment of the present invention will be described with reference to Figures 1 to 4. Figure 1 is a diagram illustrating the overview of the soil volume management device 100 according to this embodiment. The soil volume management device 100 is a device for managing the volume of soil to be transported using water content data of soil transported from the earth pressure balance shield tunneling machine 10 through the tunnel to the launch shaft. 【0012】 First, let's explain the overall configuration of the earth pressure balance shield tunneling machine 10. The earth pressure balance shield tunneling machine 10 is an earth pressure type tunneling machine in which the excavation section for excavating the ground is located at the tip in the direction of travel (arrow 40). The earth pressure balance shield tunneling machine 10 injects a soil preparation material into the soil 31 excavated in the excavation section, mixes it, and converts the excavated soil 31 into a mud that is impermeable and has plastic fluidity. Here, the excavation section is located at the tip of the earth pressure balance shield tunneling machine 10 and includes a cutter for cutting the bedrock. 【0013】 The earth pressure balance shield tunneling machine 10 then fills the mud chamber 11 and screw conveyor 14 located immediately behind the cutter with mud obtained by converting the excavated soil, and extends the shield jack 13 to push the segment 30. The earth pressure balance shield tunneling machine 10 is an excavator that obtains thrust by pushing the segment 30, generates mud pressure, and excavates in the direction of arrow 40 while stabilizing the tunnel face to prevent collapse. The skin plate 12 is the outer shell of the earth pressure balance shield tunneling machine 10 and is the part that resists soil and water pressure. 【0014】 The earth pressure balance shield tunneling machine 10 then excavates while adjusting the amount of soil 31 filling the soil chamber 11 and the screw conveyor 14 in order to adjust the earth pressure. The soil 31 filling the screw conveyor 14 is transported toward the top of the screw conveyor 14 (in the direction of arrow 41) by the action of the screw. The soil 31 that reaches the top of the screw conveyor 14 is discharged from the soil discharge port 16 provided on the screw conveyor 14. The discharge of soil 31 from the soil discharge port 16 is carried out while adjusting the amount of soil discharged, for example, by an opening and closing mechanism provided at the outlet of the soil discharge port 16. The soil discharge port 16 may be kept open at all times, so that the soil 31 transported by the screw conveyor 14 falls automatically onto the belt conveyor 17. The screw conveyor 14 is arranged with an incline so that the intake port for collecting soil 31 is located at a lower position and the soil discharge port 16 is located at a higher position. In other words, the screw conveyor 14 is tilted so that the soil 31 is transported diagonally upward from the collection opening to the discharge opening 16. 【0015】 The soil 31 discharged from the soil discharge port 16 is then transported to the rear by a belt conveyor 17 (in the direction of arrow 43) and processed in a soil disposal device located behind the earth pressure balance shield tunneling machine 10. 【0016】 Furthermore, the screw conveyor 14 is connected to a connection port located at the bottom of the partition wall 20. The partition wall 20 is a wall that separates the soil chamber 11 from the interior of the earth pressure balance shield tunneling machine 10. The gate 18 is open when excavation is being carried out by the earth pressure balance shield tunneling machine 10, and is closed when soil 31 becomes clogged in the screw conveyor 14 or the like, causing a blockage and stopping the operation of the earth pressure balance shield tunneling machine 10. 【0017】 The earth pressure balance shield tunneling machine 10 is equipped with a near-infrared moisture meter 101 and a camera 102. The near-infrared moisture meter 101 and the camera 102 are positioned at a predetermined distance from the conveying surface of the soil 31 of the belt conveyor 17, and are positioned at any position between the soil discharge port 16 and the end point of the belt conveyor 17. In the illustrated example, the near-infrared moisture meter 101 and the camera 102 are positioned in parallel near the soil discharge port 16, but their arrangement is not limited to this, and for example, they may be positioned at a certain distance from each other. 【0018】 Then, the moisture content of the soil 31 being transported on the belt conveyor 17 is measured by a near-infrared moisture meter 101, and the measured moisture content data is transmitted to the soil volume management device 100. Similarly, the image of the belt conveyor 17 captured by the camera 102 is also transmitted to the soil volume management device 100. The soil volume management device 100 uses a soil discrimination model to identify the parts of the image of the belt conveyor 17 that contain soil 31, and adopts the moisture content data measured when soil 31 is visible. Based on the adopted moisture content data, the soil volume management device 100 calculates the volume of soil 31. 【0019】 Next, the configuration of the soil volume management device 100 will be described with reference to Figure 2. The soil volume management device 100 includes a water content data acquisition unit 201, a soil sediment discrimination unit 202, a water content data selection unit 203, and a soil volume calculation unit 204. 【0020】 The moisture content data acquisition unit 201 acquires moisture content data by measuring the moisture content of soil transported by a screw conveyor 14 installed in the bulkhead of the earth pressure balance shield tunneling machine 10 using a near-infrared moisture meter 101. 【0021】 The near-infrared moisture meter 101 is a device that measures moisture content by irradiating an object with near-infrared light, which has absorption characteristics highly correlated with moisture content, and comparing the measured absorbance with a pre-created calibration curve. In other words, when a substance containing moisture is irradiated with light in the near-infrared region, the absorption rate (absorbance) changes in a specific wavelength band depending on the amount of moisture contained in the substance. This is because water molecules resonate with and absorb light of a specific wavelength, and in the near-infrared region, there are specific absorption bands such as 1.2 [μm], 1.45 [μm], and 1.94 [μm]. The measurement method is as follows: (1) Light containing near-infrared light is generated using a tungsten lamp. (2) The wavelength band that absorbs moisture (absorption wavelength) and the wavelength band that does not absorb moisture (reference wavelength band) are spectrally separated using an optical filter. (3) The spectrally separated light is irradiated onto the object to be measured. (4) The reflected light reflected from the object is measured using a photodetector. (5) Measure the amount of reflection between the absorption wavelength band and the reference wavelength band, take the ratio, and calculate the degree of absorption in the absorption wavelength band. 【0022】 The moisture content data acquisition unit 201 acquires moisture content data measured by the near-infrared moisture meter 101. Data acquisition may be performed in real time or at regular intervals. The moisture content data acquisition unit 201 may also acquire data directly from the near-infrared moisture meter 101 via wired or wireless communication, or it may acquire data via a storage medium such as non-volatile memory. 【0023】 The soil discrimination unit 202 uses images of soil 31 being transported by the belt conveyor 17 captured by the camera 102, and a soil discrimination model generated by learning the shape and color of the soil 31, to determine whether or not soil is being transported by the belt conveyor 17. The soil discrimination model is generated, for example, by learning the color and shape of soil samples excavated and transported from the tunnel face using machine learning techniques. For example, the soil discrimination model is generated by extracting and learning the contours, color area, area, edge pixels, color average, and brightness average of the soil from images of soil samples. 【0024】 Furthermore, the camera 102 may be equipped with an image sensor (CMOS (Complementary Metal-Oxide-Semiconductor) sensor) capable of capturing color images and suitable for capturing fast-moving objects. In addition, the camera 102 is positioned so that the entire conveying surface of the belt conveyor 17 in the width direction (direction perpendicular to the conveying direction) fits within its field of view, and is adjusted so that it is in focus on the conveying surface of the belt conveyor 17. 【0025】 The moisture content data selection unit 203 selects moisture content data when the sediment discrimination unit 202 determines that sediment 31 is being transported. In other words, the moisture content data selection unit 203 selects moisture content data when sediment 31 is definitely being transported, and excludes moisture content data measured when sediment 31 is not being transported (excludes outliers). 【0026】 The soil volume calculation unit 204 calculates the soil volume of the sediment 31 based on the water content ratio derived from the adopted water content data. The soil volume calculation unit 204 calculates the soil volume of the sediment 31 using the following equation (1). The parameters in equation (1) are as follows. 【0027】 【number】 【0028】 ΔV s Excessive intake of dry soil and sand m оut :Weight of discharged soil w оut :Water content ratio of discharged soil G s,оut : Soil particle density of excavated soil V: Theoretical drilling volume ρ t : Wet density of the ground G s : Soil particle density of the natural ground V a : Dry mass of the injected additive ΔV a : Dry mass of the additive that deviates from the norm 【0029】 Then, the soil quantity calculation unit 204 substitutes the water content ratio (w оut ) of the discharged soil (soil and sand 31) into Equation (1) to calculate the weight (m оut ) of the discharged soil (soil and sand 31). 【0030】 [Table 1] comparing the average water content ratios is shown below. <All data> indicates that the average water content ratio was 20.1 [%] when all the data measured by the near-infrared moisture meter 101 was adopted. Comparing this with 25.4 [%], which is the measured value (average water content ratio [%]) by the microwave oven method, it was found that the difference in the average water content ratio between the microwave oven method and when the raw data measured by the near-infrared moisture meter 101 was adopted as it was was -5.3 [%]. In contrast, as shown in <Camera image>, when the measured values adopted in this embodiment were used, the average water content ratio was 23.6 [%], and the difference from the microwave oven method was -1.8 [%]. 【0031】 【Table 1】 【0032】 Next, with reference to Figure 3, the hardware configuration of the earthwork volume management device 100 will be described. The CPU (Central Processing Unit) 310 is a processor for arithmetic control and realizes the various functional configurations of the earthwork volume management device 100 shown in Figure 2 by executing programs. The CPU 310 may have multiple processors and may execute different programs, modules, tasks, threads, etc. in parallel. The ROM (Read Only Memory) 320 stores initial data, fixed data such as programs, and other programs. The network interface 330 communicates with other devices via the network. Note that the CPU 310 is not limited to one, and may have multiple CPUs, or may include a GPU (Graphics Processing Unit) for image processing. Furthermore, it is desirable that the network interface 330 has a CPU independent of the CPU 310 and write or read data to and from the RAM (Random Access Memory) 340 area. It is also desirable to provide a DMAC (Direct Memory Access Controller) that transfers data between the RAM 340 and the storage 350 (not shown). In addition, the CPU 310 recognizes that data has been received or transferred to the RAM 340 and processes the data. Furthermore, the CPU 310 prepares the processing results in the RAM 340, and leaves subsequent transmission or transfer to the network interface 330 or DMAC. 【0033】 RAM340 is a random access memory used by the CPU310 as a temporary storage work area. RAM340 has a storage area reserved for storing the data necessary to realize this embodiment. Moisture content data341 is data on the moisture content of the soil 31 being transported by the belt conveyor 17, measured by a near-infrared moisture meter 101. Video data342 is data of the soil 31 being transported by the belt conveyor 17, captured by a camera 102. Adopted moisture content data343 is data on moisture content adopted by the moisture content data adoption unit 203. Calculated soil volume344 is the weight of the transported soil 31, calculated based on the adopted moisture content data. 【0034】 The transmitted and received data 345 is data transmitted and received via the network interface 330. The RAM 340 also has an application execution area 346 for running various application modules. 【0035】 The storage 350 stores the database, various parameters, or the following data or programs necessary for realizing this embodiment. 【0036】 Storage 350 stores a moisture content data acquisition module 351, a sediment discrimination module 352, a moisture content data selection module 353, and a soil volume calculation module 354. The moisture content data acquisition module 351 is a module that acquires moisture content data measured by a near-infrared moisture meter 101 of the sediment 31 discharged from the screw conveyor 14 of the bulkhead 20 of the earth pressure balance shield tunneling machine 10 and transported by the belt conveyor 17. The sediment discrimination module 352 is a module that determines whether or not sediment 31 is being transported by the belt conveyor 17, using images of the sediment 31 being transported by the belt conveyor 17 captured by a camera 102 and a sediment discrimination model generated by learning the shape and color of the sediment. The moisture content data selection module 353 is a module that selects the moisture content data when it is determined that sediment 31 is being transported. The soil volume calculation module 354 is a module that calculates the soil volume of the soil 31 based on the water content ratio derived from the water content data used. These modules 351 to 354 are read by the CPU 310 into the application execution area 346 of the RAM 340 and executed. The control program 355 is a program for controlling the entire soil volume management device 100. 【0037】 The input / output interface 360 ​​interfaces with input / output devices for input / output data. The display unit 361 and the operation unit 362 are connected to the input / output interface 360. A storage medium 364 may also be connected to the input / output interface 360. Furthermore, a speaker 363 which is an audio output unit, a microphone (not shown) which is an audio input unit, or a GPS position determination unit may also be connected. Note that the RAM 340 and storage 350 shown in Figure 3 do not contain programs or data related to the general-purpose functions of the earthwork volume management device 100 or other feasible functions. 【0038】 Next, the processing procedure of the earthwork volume management device 100 will be explained with reference to the flowchart shown in Figure 4. This flowchart is executed by the CPU 310 in Figure 3 using the RAM 340, and realizes the various functional configurations of the earthwork volume management device 100 in Figure 2. 【0039】 In step S401, the moisture content data acquisition unit 201 acquires moisture content data measured by a near-infrared moisture meter from the soil 31 discharged from the screw conveyor 14 installed on the bulkhead 20 of the earth pressure balance shield tunneling machine 10 and transported by the belt conveyor 17. In step S403, the soil discrimination unit 202 acquires video footage of the soil 31 being transported by the belt conveyor 17, captured by the camera 102. In step S405, the soil discrimination unit 202 uses the acquired video footage and a soil discrimination model generated by learning the shape and color of the soil to determine whether or not soil 31 is being transported by the belt conveyor 17. If it is determined that soil 31 is being transported (YES in step S405), in step S407, the moisture content data adoption unit 203 adopts the moisture content data in which it was determined that soil 31 was being transported. In step S409, the soil volume calculation unit 204 calculates the soil volume of the soil 31 based on the moisture content ratio derived from the adopted moisture content data. If it is determined that the soil 31 is not being transported by the belt conveyor 17 (NO in step S405), the soil volume management device 100 returns to step S403. 【0040】 According to this embodiment, the water content of soil can be accurately measured with a simple device configuration. Furthermore, since the water content of soil can be accurately measured, the volume of soil can be accurately calculated. 【0041】 [Second Embodiment] Next, a soil volume management device according to a second embodiment of the present invention will be described with reference to Figures 5 to 8. Figure 5 is a diagram illustrating the overview of the soil volume management device according to this embodiment. The soil volume management device according to this embodiment differs from the first embodiment in that it has a distance measuring unit. Since the other configurations and operations are the same as in the first embodiment, the same reference numerals are used for the same configurations and operations, and their detailed descriptions are omitted. 【0042】 The overall configuration of the earth pressure balance shield tunneling machine 50 is substantially the same as that of the first embodiment described above. The earth pressure balance shield tunneling machine 50 is equipped with a distance meter 501, a near-infrared moisture meter 101, and a camera 102. These devices are arranged in the order of distance meter 501, near-infrared moisture meter 101, and camera 102, starting from the side closest to the tunnel face. Note that the arrangement of these devices is not limited to the example shown here. The distance meter 501 measures the distance between the height of the soil 31 being transported by the belt conveyor 17 and the near-infrared moisture meter 101. The distance data measured by the distance meter 501 is transmitted to the soil volume management device 500 along with the image captured by the camera 102 and the moisture content data measured by the near-infrared moisture meter 101. The soil volume management device 500 uses the moisture content data measured when the distance measured by the distance meter 501 is a predetermined distance to calculate the volume of soil 31. 【0043】 Next, the configuration of the soil volume management device 500 will be described with reference to Figure 6. The soil volume management device 500 further includes a distance data acquisition unit 601. The distance data acquisition unit 601 acquires distance data from a distance meter 501 that measures the distance between the accumulation height of the soil 31 being transported by the belt conveyor 17 and a near-infrared moisture meter 101. 【0044】 The rangefinder 501 is, for example, a 60 GHz millimeter-wave radar instrument that analyzes the state of reflected waves from an object to be measured and measures the distance to that object. Since the installation position (installation height) of the near-infrared moisture meter 101 is fixed, the rangefinder 501 is installed in a position that matches the installation position of the near-infrared moisture meter 101. For example, the rangefinder 501 and the near-infrared moisture meter 101 are installed so that the height of the millimeter-wave radar transmitter of the rangefinder 501 and the near-infrared transmitter of the near-infrared moisture meter 101 are at the same height. The focal point of the rangefinder 501 is set to be near the center in the width direction (perpendicular to the conveying direction) of the belt conveyor 17. 【0045】 The moisture content data selection unit 203 then selects the moisture content data when the soil discrimination unit 202 determines that soil 31 is being transported and the distance measured by the distance meter 501 is a predetermined distance. In other words, the moisture content data selection unit 203 excludes moisture content data measured when the amount of soil 31 that can be transported in a stable amount for which moisture content can be measured is not being transported (excludes outliers). The predetermined distance is set, for example, to 350 ± 30 [mm] from the transport surface of the belt conveyor 17, taking into account the height of the soil 31. In other words, moisture content data outside this range is excluded. The predetermined distance can be set according to the transport conditions of the soil 31, the performance and specifications of the earth pressure balance shield tunneling machine 50, etc. 【0046】 The amount or height (accumulation amount or accumulation height) of soil 31 being transported by the belt conveyor 17 changes moment by moment depending on the amount of gravel and moisture contained in the soil 31. Therefore, if the amount of soil 31 is extremely small (accumulation height) or if part of the conveying surface of the belt conveyor 17 is exposed, the soil 31 may not be transported correctly. Consequently, if soil 31 is not present within a certain distance from the distance meter 501, that is, if soil 31 is not present within a certain height range from the conveying surface of the belt conveyor 17, the measured moisture content of the soil 31 becomes unreliable. 【0047】 Next, Table 2, which compares the average moisture content, is shown below. <All Data> indicates that the average moisture content was 20.1[%] when all data measured by the near-infrared moisture meter 101 was used. Comparing this with the measurement value (average moisture content [%]) of 25.4[%] obtained by the microwave method, it was found that the difference between the average moisture content obtained by using the raw data measured by the near-infrared moisture meter 101 and the microwave method is -5.3[%]. In contrast, as shown in <Camera Image + Rangefinder>, when the measurement value adopted in this embodiment is used, the average moisture content is 24.9[%], and the difference from the microwave method is -0.5[%]. However, the number of moisture content data points adopted was 209, which is a decrease compared to the first embodiment described above. 【0048】 [Table 2] 【0049】 Next, with reference to Figure 7, the hardware configuration of the earthwork volume management device 500 will be described. RAM 740 is a random access memory used by the CPU 310 as a temporary storage work area. RAM 740 has a storage area reserved for storing the data necessary to realize this embodiment. Distance data 741 is data measured by the distance meter 501. 【0050】 Storage 750 stores the database, various parameters, or the following data or programs necessary for realizing this embodiment. 【0051】 The storage 750 stores the distance data acquisition module 751. The distance data acquisition module 751 is a module that acquires distance data from a distance meter 501 that measures the distance between the accumulation height of the soil 31 being transported by the belt conveyor 17 and a near-infrared moisture meter. This module 751 is read by the CPU 310 into the application execution area 346 of the RAM 740 and executed. 【0052】 Next, the processing procedure of the earthwork volume management device 500 will be explained with reference to the flowchart shown in Figure 8. This flowchart is executed by the CPU 310 in Figure 7 using RAM 740, and realizes the various functional configurations of the earthwork volume management device 500 shown in Figure 5. 【0053】 In step S801, the water content data acquisition unit 601 determines whether the distance measured by the distance meter 501 is a predetermined distance. If it is determined that the distance is a predetermined distance (YES in step S801), the soil volume management device 500 proceeds to step S407. If it is determined that the distance is not a predetermined distance (NO in step S801), the soil volume management device 500 returns to step S403. 【0054】 According to this embodiment, the water content of soil can be accurately measured with a simple device configuration. Furthermore, since the water content of soil can be accurately measured, the volume of soil can be accurately calculated. 【0055】 [Third Embodiment] Next, the earthwork volume management device 900 according to the third embodiment of the present invention will be described with reference to Figures 9 to 12. Figure 9 is a diagram illustrating the overview of the earthwork volume management device 900 according to this embodiment. The earthwork volume management device 900 according to this embodiment differs from the first embodiment in that it has a timing unit. The other configurations and operations are the same as in the first embodiment, so the same components and operations are denoted by the same reference numerals and their detailed descriptions are omitted. 【0056】 The overall configuration of the earth pressure balance shield tunneling machine 90 is substantially the same as that of the first embodiment described above. The earth pressure balance shield tunneling machine 90 is equipped with a near-infrared moisture meter 101 and a camera 102, similar to the earth pressure balance shield tunneling machine 10 shown in the first embodiment. Furthermore, the earth pressure balance shield tunneling machine 10 is equipped with a clock 901 for measuring time. These devices are arranged in the order of the near-infrared moisture meter 101 and the camera 102, starting from the side closest to the tunnel face. Note that the arrangement of these devices is not limited to the example shown here. 【0057】 The soil volume management device 900 then acquires data measured by the clock 901 and adopts the water content data when it is determined from the video captured by the camera 102 that soil 31 has been transported continuously for a predetermined period of time. 【0058】 Next, the configuration of the soil volume management device 900 will be described with reference to Figure 10. The soil volume management device 900 further includes a timing time determination unit 1001. The timing time determination unit 1001 determines whether the time during which soil 31 is being transported by the belt conveyor 17 in the image captured by the camera 102 is continuous for a predetermined time (a pre-set time). If the determined time is the predetermined time, the water content data acquisition unit 203 acquires the water content data of the soil 31 transported during the predetermined time and calculates the soil volume of the soil 31. The predetermined time can be set arbitrarily, for example, to 5 seconds, but it is set appropriately according to the excavation conditions by the earth pressure balance shield tunneling machine 90 and other conditions. 【0059】 The water content data selection unit 203 selects the water content data for the case where it is determined that the soil 31 has been transported for a predetermined time, for example, 5 seconds continuously. 【0060】 In this way, by adopting water content data when the soil 31 is transported stably for a predetermined period of time, outliers in the data can be eliminated, and the reliability of the adopted data can be improved. 【0061】 Next, Table 3, which compares the average moisture content, is shown below. <All Data> indicates that the average moisture content was 20.1[%] when all data measured with the near-infrared moisture meter 101 was used. Comparing this with the measurement value (average moisture content [%]) of 25.4[%] obtained by the microwave method, it was found that the difference between the average moisture content when using the raw data measured with the near-infrared moisture meter 101 and the microwave method is -5.3[%]. In contrast, as shown in <Camera Image + Time>, when the measurement value adopted in this embodiment is used, the average moisture content is 24.4[%], and the difference with the microwave method is -1.0[%]. 【0062】 [Table 3] 【0063】 Next, with reference to Figure 11, the hardware configuration of the soil volume management device 900 will be described. RAM 1140 is a random access memory used by the CPU 310 as a temporary storage work area. RAM 1140 has a storage area reserved for storing the data necessary to realize this embodiment. Timing data 1141 is data relating to the time at which the soil discrimination unit 202 (timing time determination unit 1001) determined that soil 31 was transported by the belt conveyor 17. 【0064】 The storage 1150 stores the database, various parameters, or the following data or programs necessary for realizing this embodiment. 【0065】 The storage 1150 stores the timing determination module 1151. The timing determination module 1151 is a module that determines whether or not the soil 31 being transported by the belt conveyor 17 has been continuously transported for a predetermined time. This module 1151 is read by the CPU 310 into the application execution area 346 of the RAM 1140 and executed. 【0066】 Next, the processing procedure of the earthwork volume management device 900 will be explained with reference to the flowchart shown in Figure 12. This flowchart is executed by the CPU 310 in Figure 11 using the RAM 1140, and realizes the various functional configurations of the earthwork volume management device 900 in Figure 10. 【0067】 In step S1201, the timing determination unit 1001 determines, based on the image captured by the camera 102, whether or not the soil 31 being transported on the belt conveyor 17 is being transported continuously for a predetermined time. If it is determined that it is being transported continuously for the predetermined time (YES in step S1201), the soil volume management device 900 proceeds to step 407. If it is determined that it is not being transported continuously for the predetermined time (NO in step S1201), the soil volume management device 900 returns to step S403. 【0068】 According to this embodiment, the water content of soil can be accurately measured with a simple device configuration. Furthermore, since the water content of soil can be accurately measured, the volume of soil can be accurately calculated. 【0069】 Although the present invention has been described above with reference to embodiments, the present invention is not limited to the embodiments described above and can be modified as appropriate. Various modifications to the configuration and details of the present invention can be made that will be understood by those skilled in the art within the scope of the present invention. Furthermore, any system or apparatus that combines the separate features included in each embodiment in any way is also included in the scope of the present invention. 【0070】 Furthermore, the present invention may be applied to a system composed of multiple devices or to a single device. Moreover, the present invention is also applicable when an information processing program that realizes the functions of the embodiment is supplied to a system or device and executed by a built-in processor. Therefore, the technical scope of the present invention includes programs installed on a computer to realize the functions of the present invention on a computer, the medium on which the program is stored, the WWW (World Wide Web) server that allows the program to be downloaded, and the processor that executes the program. In particular, at least a non-transitory computer-readable medium containing a program that causes a computer to execute the processing steps included in the above-described embodiment is included in the technical scope of the present invention.

Claims

[Claim 1] This is a soil volume management device that manages the amount of soil transported from the earth pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition unit acquires moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter. A soil discrimination unit determines whether or not soil is being transported on the belt conveyor, using images of the soil being transported on the belt conveyor by a camera and a soil discrimination model generated by learning the shape and color of the soil. A distance data acquisition unit that acquires distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A water content data selection unit selects the water content data when the soil discrimination unit determines that soil is being transported and the distance measured by the distance meter is a predetermined distance, A soil volume management device equipped with this device. [Claim 2] The soil volume management device according to claim 1, further comprising a soil volume calculation unit that calculates the soil volume of the soil based on the water content ratio derived from the water content data that has been adopted. [Claim 3] A method for managing the volume of soil transported from a mud pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition step involves obtaining moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter, and A soil discrimination step that determines whether or not the soil is being transported by the belt conveyor, using images of the soil being transported by the belt conveyor captured by a camera and a soil discrimination model generated by learning the shape and color of the soil, A distance data acquisition step involves acquiring distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A moisture content data adoption step is performed in which, if it is determined in the soil identification step that soil is being transported and the distance measured by the distance meter is a predetermined distance, the moisture content data is adopted. A method for managing soil volume, including soil volume management. [Claim 4] This is a soil volume management program that manages the amount of soil transported from the earth pressure balance shield tunneling machine through the tunnel to the launch shaft, A moisture content data acquisition step involves obtaining moisture content data by measuring the moisture content of soil discharged from a screw conveyor installed in the bulkhead of the earth pressure balance shield tunneling machine and transported by a belt conveyor using a near-infrared moisture meter, and A soil discrimination step that determines whether or not the soil is being transported by the belt conveyor, using images of the soil being transported by the belt conveyor captured by a camera and a soil discrimination model generated by learning the shape and color of the soil, A distance data acquisition step involves acquiring distance data from a distance meter that measures the distance between the height of the soil being transported by the belt conveyor and the near-infrared moisture meter, A moisture content data adoption step is performed in which, if it is determined in the soil identification step that soil is being transported and the distance measured by the distance meter is a predetermined distance, the moisture content data is adopted. A program that uses a computer to manage the volume of earthworks.

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