JP2021060362A - Buried object survey system and buried object survey method - Google Patents

Abstract

To detect with good accuracy the buried states such as the buried position and shape of a survey object that is buried in an excavation area, while simplifying buried object survey work.SOLUTION: In a buried object survey system 1, buried object survey work is carried out using a survey device 100 in which a plurality of buried object detection units 10 for detecting a magnetic field emanated from a buried object including a survey object existing in an excavation area E are provided in parallel spaced apart by a prescribed scanning pitch in a direction that intersects with the scanning direction of the excavation area. The buried object survey system comprises: a position detection unit 20 for detecting the survey position information on the buried object detection units 10 in the excavation area E; and a buried object determination unit 31 for determining, on the basis of buried object detection information and survey position information set in advance, whether or not the buried object is a survey object, and outputting, as survey object information, the buried object detection information and survey position information on the buried object having been determined as a survey object.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a buried object exploration system and a buried object exploration method for exploring buried objects such as water pipes, and the burial position, shape, and depth of the exploration object in the excavation area, especially before and during excavation. It relates to a buried object exploration system and a buried object exploration method in which the buried state can be specified.

When excavating a road using construction equipment for excavation such as a backhoe, buried objects such as gas pipes, water pipes, and conduits are often buried under the excavation area. It is essential to accurately grasp the position of the buried object in order to prevent damage and destruction. Therefore, in general, the construction is being carried out while checking the buried drawings provided by the management company that manages the buried objects in advance (the figure showing the buried state of the buried objects near the construction site). ..

However, the buried drawings provided may not correctly reflect the buried state of the buried object. Therefore, unexpected buried objects may be found during the excavation work, or the buried objects may be buried at a position different from the drawing, and there is a risk that the buried objects will be damaged or damaged during the excavation work. there were.

Therefore, as a method of preventing such an accident, a method of searching for the position of the buried object by using the inventions disclosed in the following Patent Documents 1 and 2 is adopted while utilizing the buried drawing as a preliminary investigation. ..

Japanese Unexamined Patent Publication No. 9-288187 Japanese Unexamined Patent Publication No. 2014-238350

However, in the invention of Patent Document 1, it is possible to search for a buried object in the excavated area before or during excavation, but the excavated area is made of metal, which is an object to be explored as a buried object. It was difficult to accurately identify the position and shape of the buried object because it contained foreign substances such as scrap iron in addition to the piping.

Further, in the invention of Patent Document 2, although it is easy to specify the position and shape of the buried object, it is necessary to read the image data obtained from the reflected wave to identify the buried object, which requires skillful skill. .. Furthermore, since the mainstream of this type of exploration device is a cart type with wheels provided in the housing so as to scan the excavation area before excavation, the ground is leveled each time to explore the buried object at any time during excavation. It is not easy to use because it requires work.

Further, in the inventions of Patent Documents 1 and 2, it is necessary to scan the excavated area many times in the buried object exploration work, and especially when the excavated area is relatively large, it takes time and effort for the buried object exploration work. There is a problem.

At least one embodiment of the present invention has been made in view of the above circumstances. Specifically, the burial position of the exploration object to be buried in the excavation area while simplifying the exploration work of the buried object. It is an object of the present invention to provide a buried object exploration system and a buried object exploration method capable of accurately detecting a buried state such as a shape.

The buried object exploration system of the present invention uses an exploration device provided with a buried object detection unit that detects a magnetic field emitted from a buried object including an exploration object existing in the excavated area to perform buried object exploration work in the excavated area. In the buried object exploration system to be performed, the position detection unit that detects the exploration position information of the buried object detection unit in the excavation area, the buried object detection information based on the detection signal detected by the buried object detection unit, and the exploration. It is determined whether or not the buried object is the exploration target based on the position information and the preset determination information, and when the buried object is the exploration target, the buried object detection information and the said A buried object determination unit that outputs exploration position information as exploration target information,
The buried object detection unit is provided in parallel with the exploration device at a predetermined scanning pitch in a direction intersecting the scanning direction of the excavation area.

Preferably, in the buried object exploration system, the exploration device may be configured to include an attachment mechanism to which the buried object detection unit is attached and expands and contracts in a direction intersecting the scanning direction so that the scanning pitch can be adjusted.

Preferably, in the buried object exploration system, the determination information may include at least one determination element of the number of detections of the detection signal detected by the buried object detection unit and the amplitude intensity of the detection signal. ..

Preferably, in the buried object exploration system, the exploration target information is reflected in the excavation area data created based on the area setting information regarding the excavation area set in advance, and the object is buried in the excavation area. The configuration may include a buried state information creating unit that creates buried state information that serves as image data for visualizing the buried state of the exploration target.

Preferably, the buried object exploration system may include a storage unit that stores the buried state information as exploration history information, and the exploration device may include a display unit that displays the buried state information.

Preferably, the buried object exploration system may include an execution determination unit that determines whether or not the buried object exploration work has been executed in the excavation area based on the exploration history information.

Preferably, in the buried object exploration system, when it is determined as the determination result of the determination unit that the buried object exploration work for the excavation area is not executed, the notification unit notifies the notification destination to that effect. It may be configured to include.

In the buried object exploration method according to the present invention, a buried object detecting unit that detects a magnetic field emitted from a buried object including an exploration object existing in the excavation area performs a predetermined scanning in a direction intersecting the scanning direction of the excavation area. It is a buried object exploration method that performs buried object exploration work in the excavated area by using a plurality of exploration devices provided in parallel at intervals, and obtains the exploration position information of the buried object detection unit in the excavated area. Based on the detection process, the buried object detection information based on the detection signal detected by the buried object detection unit, and the exploration position information, it is determined whether or not the buried object is the exploration target, and the buried object is buried. When the object is the exploration object, the process of outputting the buried object detection information and the exploration position information as the exploration object information is included.

According to at least one embodiment of the present invention, it is possible to accurately detect the buried state such as the buried position and shape of the exploration object to be buried in the excavation area while simplifying the buried object exploration work.

It is a figure for demonstrating the buried object exploration system which concerns on this embodiment. It is a block diagram which shows the functional configuration example of this system. (A) is a diagram schematically showing an exploration device, and (b) is a diagram showing an example of a scanning method in this system. It is a figure which showed the judgment example by the buried object judgment part in this system. It is a figure which showed the other judgment example by the buried object judgment part in this system. It is a flowchart which shows a series of processing operations in this system. It is a flowchart which shows the processing operation of the buried object determination process in this system. It is a flowchart which shows the processing operation of the exploration execution judgment processing in this system.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
The embodiments shown here are examples for embodying the technical idea of the present invention, and do not limit the present invention. In addition, all other feasible forms, examples, operational techniques, etc. that can be considered by those skilled in the art without departing from the gist of the present invention are included in the scope and gist of the present invention, and are described in the claims. It is included in the invention and its equivalent range.

Further, the drawings attached to the present specification may be represented schematically by changing the scale, aspect ratio, shape, etc. from the actual ones for convenience of illustration and comprehension. However, it does not limit the interpretation of the present invention.

As shown in FIG. 1, the buried object exploration system 1 according to an embodiment of the present invention is buried along the road R, for example, when excavating the road R using an excavation construction device C such as a backhoe. Exploration target (for example, water pipe, conduit, optical fiber) that is a buried object existing in the excavation area E where the gas supply pipe that connects the gas main branch pipe and the gas inner pipe buried in the site of the house H is buried. The purpose is to acquire information on buried objects such as the position, shape, and depth of buried pipes, in addition to the presence or absence of buried pipes P) such as conduits, before or during excavation.

The objects to be explored in this system are excavated areas such as water pipes, conduits, and optical fiber conduits made of magnetic materials (for example, iron materials containing iron such as cast iron and steel) generated in the presence of the earth's magnetic field. It is a "buried pipe P" buried so as to cross the inside of E. In the present embodiment, the “water supply pipe P2” will be described as an example of the buried pipe P.

Further, the state in which the buried pipe P to be the exploration object "crosses" the excavation area E means that the excavation area E is buried at a predetermined distance so as to extend from one side forming the excavation area E toward the other side when the excavation area E is viewed in a plan view. Refers to the state of being done. The burial direction of the buried pipe P is not limited to the vertical direction, the horizontal direction, and the diagonal direction when the excavation area E is viewed in a plan view, and when the excavation area E is three-dimensionally grasped, it is higher than the above direction. Elements in the vertical direction (vertical (vertical) direction) may also be included.

<System configuration>
Hereinafter, the buried object exploration system 1 according to the present embodiment will be described.
As shown in FIG. 2, the buried object exploration system 1 according to the present embodiment includes a buried object detection unit 10, a position detection unit 20, a control unit 30, a storage unit 40, a display unit 50, and an operation setting unit. The exploration device 100 is composed of 60 and a notification unit 70, and can be carried by a worker who has adopted an electromagnetic induction method as a detection method, for example. Further, the exploration device 100 includes a power supply unit 80 realized by, for example, a primary battery or a rechargeable secondary battery in order to supply power to each unit.

It is not necessary that all the parts constituting the buried object exploration system 1 are provided in the exploration device 100. For example, the display unit 50 is a separate display device or a terminal owned by a construction worker (worker, manager, etc.). A device (smartphone, tablet terminal, etc.) may be used as a substitute, and the storage unit 40 may use the memory of the terminal device, an external server, or the like. In this case, the exploration device 100 is wired or wireless with an external device such as a display device, a terminal device, or an external server via a communication unit 90 (communication I / F) for communicating with the outside via a network. The configuration may be such that various information is communicated by communicating.

As shown in FIG. 3A, the exploration device 100 has a grip portion 102 in which an operator grips one end side of the main body portion 101, and a plurality of buried object detection portions 10 are attached to the other end side. Specifically, a plurality (three in the example) of the buried object detection unit 10 are attached in parallel to the tip end side of the exploration device 100 in a direction intersecting the scanning direction when scanning in the excavation area E. .. Note that FIG. 3A shows an example in which the mounting mechanism 103 of the exploration device 100 is provided with three mounting locations for the buried object detection unit 10, but the number of mounting locations is not limited to this.

The exploration device 100 is provided with an attachment mechanism 103 for attaching the buried object detection unit 10 so that the size of the excavation area E can be increased or decreased as appropriate, and is buried according to the length of the excavation area E in the width direction. The number of object detection units 10 to be installed is determined. The mounting mechanism 103 can be expanded and contracted in the width direction (parallel direction of the buried object detection unit 10), and the length can be adjusted when setting the scanning pitch according to the excavation width direction of the excavation area E. .. Further, the installation interval of the buried object detecting unit 10 depends on the device performance such as the detection sensitivity, but the scanning pitch when scanning the buried object detecting unit 10 alone (the detection width that can be searched by one buried object detecting unit 10). ) (As an example, about 20 to 50 cm).

FIG. 3B is a diagram showing an example of a scanning method when the buried object exploration work in the excavation area E is executed. In FIG. 3B, the buried pipe P to be explored extends the excavation area E in the vertical direction in the figure from the water distribution pipe P1 buried in the left-right direction in the figure along the road R toward the house H. It becomes a water supply pipe P2 buried so as to cross. Further, the excavation area E has a rectangular shape, the longitudinal direction in the excavation area E is defined as the “first direction”, and the lateral direction (excavation width direction) intersecting the first direction is defined as the “second direction”.

In the case of the excavation area E as shown in FIG. 3B, since a plurality of buried object detection units 10 are attached to the exploration device 100 at predetermined intervals along the second direction, the first Buried object exploration work becomes possible with one scan along the direction. Assuming that the excavation width of the excavation area E shown in FIG. 3B is about 60 cm and the scanning pitch is about 20 cm, the number of appropriate buried object detection units 10 attached to the exploration device 100 is “3”.

By performing the buried object exploration work using the exploration device 100 having such a configuration, the worker can perform the buried object exploration work in the excavation area E with the buried object detection unit 10 side of the exploration device 100 facing the ground surface of the excavation area E. By simply scanning along the direction of 1, the entire excavation area E can be scanned at once, the exploration time required for the buried object exploration work can be significantly reduced, and the work can be performed efficiently.

Further, when the more detailed buried state of the buried pipe P in the excavated area E is to be known, the excavated area E is scanned over the entire area along the first direction as shown in FIG. 3 (b). A second scanning path S1 moves the exploration apparatus 100 and reciprocates in the excavation area E along the second direction while leaving a predetermined scanning pitch to scan the excavation area E over the entire area. The exploration device 100 may be moved along the scanning path S2 of the above.

In this way, while moving the exploration device 100 along the first scanning path S1 and scanning the excavation area E over the entire area, while moving the exploration device 100 along the second scanning path S2, the excavation area E is spread over the entire area. By scanning over, the excavation area E can be scanned in a grid pattern. Therefore, it is possible to accurately detect the presence / absence of the buried object existing in the excavation area E, the buried position, the shape, the depth of the buried pipe P which is the exploration target, and the like.

The buried object detection unit 10 detects the buried object buried in the excavation area E. As an example, the buried object detection unit 10 includes a detection coil, a magnetic field resonance circuit, and a configuration capable of searching for a buried object by an electromagnetic induction method such as a power supply, and is attached to, for example, the attachment mechanism 103 of the exploration device 100. Be done. The buried object detection unit 10 generates a high-frequency magnetic field from the detection coil, and when the detection object (buried object) to be searched approaches the magnetic field, an induced current flows through the detection object by electromagnetic induction, and the voltage generated by the induced current. Detects and detects magnetism.
The buried object detection unit 10 is not particularly limited as long as the buried object buried in the excavation area E can be detected. Therefore, in addition to the above-mentioned "electromagnetic induction method" configuration, the buried object detection unit 10 detects a magnetic field from a magnetic material (iron material, magnet, electric field, etc.) generated in the presence of the earth's magnetic field, for example. The "geomagnetic detection method" may be adopted.

When the buried object detection unit 10 detects a buried object, the larger the size of the buried object, the larger the output of the detection signal, and the closer it is to the buried object detection unit 10, the larger the output of the detection signal tends to be. That is, by analyzing the output state of the detection signal detected by the buried object detection unit 10, the presence / absence of the buried object including the magnetic material in the excavation area E, the size of the buried object, and the depth at which the buried object exists can be roughly determined. It becomes possible to identify.

Further, the buried object detection unit 10 can adjust the detection sensitivity by performing a predetermined operation on the operation setting unit 60, and becomes an exploration target by analyzing the detection signal in the state where the sensitivity is adjusted. Information such as the shape of the buried pipe P and the burial depth can be accurately obtained.

The buried object detection unit 10 detects a buried object existing in the excavated area E by scanning the ground surface of the excavated area E in a predetermined direction, and controls a detection signal indicating the presence or absence of the buried object as the buried object detection information. Output to unit 30.

The buried object detection unit 10 has a structure that can be attached to and detached from the attachment mechanism 103 of the exploration device 100, but is not limited to this, and the number of the buried object detection unit 10 is fixed in advance according to the excavation width of the excavation area E or the main body unit. It may be configured integrally provided with 101.

The position detection unit 20 detects the search position of the buried object detection unit 10 in the excavation area E over time. The position detection unit 20 can measure, for example, an acceleration sensor (for example, a biaxial acceleration sensor capable of measuring linear acceleration in two directions of the X-axis and the Y-axis, and linear acceleration in the three directions of the X-axis, the Y-axis, and the Z-axis). 3-axis accelerometer), angular velocity sensor (for example, 2-axis gyro sensor capable of measuring rotational angular velocity in two directions of X-axis and Y-axis, and rotational angular velocity in three directions of X-axis, Y-axis and Z-axis can be measured 3 It is a sensor such as an axis gyro sensor) and GPS (Global Positioning System) that can detect search position information including at least the moving distance and moving direction of the buried object detection unit 10. Further, the position detection unit 20 may be equipped with an altimeter and may add a function of detecting the depth of the buried object detection unit 10 from the ground surface before excavation.

The position detection unit 20 detects the search position information of the buried object detection unit 10 when the excavation area E is scanned over time and outputs it to the control unit 30. The detection timing of the position detection unit 20 is set at all times or at predetermined time intervals when the buried object exploration work is performed by following a predetermined scanning path from the exploration start position to the exploration end position. Therefore, the moving speed of the buried object detection unit 10 and the time information (detection time information) when the exploration position information is detected are also added to the exploration position information.

The control unit 30 includes various processors such as a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory), and executes each process executed by the buried object exploration system 1 based on various information. .. The control unit 30 includes a buried object determination unit 31, a buried state information creation unit 32, and an execution determination unit 33 as a configuration of functions realized by executing a predetermined program.

Further, the control unit 30 is provided with a time measuring unit 34 for measuring the current date and time (including the date and time). Specifically, the timekeeping unit 34 is a real-time clock (RTC) or the like, but it may be in any form.

The buried object determination unit 31 detects the buried object based on the buried object detection information detected by the buried object detection unit 10, the search position information detected by the position detection unit 20, and preset determination information. It is determined whether the object is a buried pipe P or a foreign substance to be searched. The buried object determination unit 31 searches for buried object detection information and exploration position information corresponding to the detection position of the buried pipe P buried in the excavation area E as a determination result of determining that the buried object is an exploration target. It is output to the buried state information creation unit 32 as object information. Further, when the buried object determination unit 31 determines that the buried pipe P is not buried in the excavation area E as a result of the determination, a notification that the buried pipe P is not buried in the excavation area E is buried. Output to the state information creation unit 32.

The presence or absence of the exploration target object can be determined by the buried object determination unit 31 based on, for example, the "number of detections" and the "amplitude magnitude" of the detection signals detected in the excavation area E, and at least one of these determination elements. Elements are used as judgment information.
When "the number of detections of the detection signal" is set as the determination information, the buried object determination unit 31 determines the excavation area E based on the detected buried object detection information, the exploration position information, and the above determination information. When the buried object detection information is detected a plurality of times so as to cross the inside, it is determined that the buried object is the "buried pipe P", and the other buried objects are determined as "foreign matter".
When "large or small of the amplitude of the detection signal" is set as the determination information, the buried object determination unit 31 can assume the range of the amplitude intensity of the detection signal when the buried pipe P is detected (determination amplitude range). Is set in advance, and based on the detected buried object detection information, the exploration position information, and the above-mentioned determination information, when the detection signal is within this determination amplitude range, the buried object is "buried pipe P". Judgment is made, and other buried objects are judged as "foreign matter".

FIG. 4 is an output example of the detection signal when the determination element of the buried object determination unit 31 is “the number of detections of the detection signal”, and shows the state of the detection signal when scanning along the first scanning path S1. There is.
As shown in FIG. 4, it is assumed that the worker has moved from the exploration start position on the left side of the figure to the exploration end position on the right side of the figure in the excavation area E. At this time, the exploration device 100 detects the water supply pipe P2 by the three buried object detection units 10, and detects the foreign matter in the excavation area E only by the central buried object detection unit 10, so that the water supply pipe P2 and the foreign matter are detected. The number of signals is different.
In order to determine whether or not the buried object is buried in the excavation area E, the buried object determination unit 31 sets the buried object detection information, the exploration position information, and the “number of detection signal detections” as determination elements. It is determined whether the buried object is a buried pipe P or a foreign substance based on the determination information, and when the buried object is determined as the buried pipe P, the exploration target information according to the position where the buried pipe P is detected is input to the buried state information creation unit. Output to 32.

FIG. 5 is an output example of the detection signal when the determination element of the buried object determination unit 31 is “large or small of the amplitude of the detection signal”, and shows the state of the detection signal when scanned by the first scanning path S1. ing.
As shown in FIG. 5, it is assumed that the worker has moved from the exploration start position on the left side of the figure to the exploration end position on the right side of the figure in the excavation area E. At this time, the exploration device 100 detects the water supply pipe P2 by the three buried object detection units 10, and detects a relatively large foreign matter by the three buried object detection units 10 like the water supply pipe P2, but the water supply pipe P2 and the foreign matter. The amplitude of the detection signal is different between and.
In order to determine whether or not the buried object is buried in the excavation area E, the buried object determination unit 31 sets the buried object detection information, the exploration position information, and "the magnitude of the amplitude of the detection signal" as the determination element. It is determined whether the buried object is the buried pipe P or a foreign substance based on the determined determination information, and when the buried object is determined as the buried pipe P, the exploration target information corresponding to the position where the buried pipe P is detected is created as the buried state information. Output to unit 32.

The buried pipe P can be specified more accurately by combining the above-mentioned two elements of "the number of detections of the detection signal" and "the magnitude of the amplitude of the detection signal" as the determination elements of the buried object determination unit 31. .. For example, when a long steel frame is buried so as to cross the excavation area E, the number of detections of the detection signal is satisfied, but when the diameter of the buried pipe P and the width size of the steel frame are different, the amplitude of the detection signal is satisfied. It is possible to judge whether it is a buried pipe P or a steel frame based on the size of.

The buried state information creation unit 32 is buried in the excavation area E based on the exploration target information from the buried object determination unit 31 and the excavation area data created by the area setting information set by the operation setting unit 60. Create buried state information as image data for visualizing the buried state of the buried pipe P.

When the buried state information is created as two-dimensional data, at least the buried state of the buried pipe P (buried direction, shape of the buried pipe P, thickness of the buried pipe P, etc.) in the excavation area E in a plan view is the two-dimensional data. It is reflected in the excavation area data created as. Further, when the buried state information is created as three-dimensional data, information on the buried depth of the buried pipe P is further added as the buried state of the buried pipe P, so that this information is used as the three-dimensional data for the excavation area data. By reflecting this in, it is possible to obtain a three-dimensional bird's-eye view of the buried state of the buried pipe P, and it is possible to obtain more detailed information.

Regarding the shape of the buried pipe P reflected in the buried state information, the buried state information creating unit 32 analyzes the signal strength of the buried object detection information so that the cross-sectional shape of the buried pipe P is circular (including an elliptical shape). It is possible to specify whether it is a rectangle or a polygon.

Further, the buried depth information reflected in the buried state information is acquired by the buried state information creating unit 32 analyzing the signal strength of the detection signal, which is the buried object detection information, based on a predetermined analysis process. That is, before excavation, the burial depth information obtained based on the exploration target information after scanning the excavation area E can be used. If the burial depth information is being excavated, in addition to the method of obtaining it based on the signal analysis processing of the burial state information creating unit 32 as described above, the actual measurement value obtained by measuring the burial depth from the ground surface at the start of digging. May be input from the operation setting unit 60.

Further, when the buried object determination unit 32 notifies that the buried pipe P is not buried in the excavation area E, the buried state information creating unit 32 reflects this in the buried state information. That is, the buried pipe P is not displayed in the buried state information created when this notification is received.

The execution determination unit 33 performs the buried object exploration work in the excavation area E based on the presence or absence of the exploration history information indicating that the buried object exploration work such as the buried state information stored in the storage unit 40 has been performed. Judge whether or not it was broken. When the execution determination unit 33 determines that the buried object exploration work has not been performed, the execution determination unit 33 outputs a notification instruction for notifying the determination result to the notification unit 70. As a result, even if the worker forgets to perform the buried object exploration work, the administrator can urge the worker to perform the buried object exploration work based on the content of the notification from the notification unit 70.

The execution determination unit 33 does not necessarily have to be notified via the notification unit 70. For example, the display unit 50 may output display information for notifying the notification content and display it on the display unit 50, or the communication unit. Notification may be made to an external device (management server, terminal device owned by a person involved in construction, etc.) to be notified via 90.

In addition, the execution determination unit 33 also determines whether or not all the various processes performed after the buried object exploration work have been completed, and if it is determined that all the processes have not been completed, the unfinished process is performed. Identify and have the corresponding parts execute the process.

The storage unit 40 is composed of a storage device such as a flash memory, an HDD (Hard Disk Drive), and an SSD (Solid State Drive), and stores a predetermined program or the like used in the buried object exploration system 1. Further, the storage unit 40 has various information obtained in the buried object exploration work (for example, the buried object detection information detected by the buried object detecting unit 10, the exploration position information detected by the position detecting unit 20, and the buried object determining unit). The exploration object information acquired in 31, the buried state information created by the buried state information creating unit 32, the determination result determined by the execution determination unit 33, and the like) are stored. The buried state information stored in the storage unit 40 is used as exploration history information indicating that the inside of the excavation area E has been scanned during the excavation work.

Further, the storage unit 40 stores determination information set by the buried object determination unit 31 to determine whether or not the buried object buried in the excavation area E is the buried pipe P.

The determination information is information for determining that the buried object detected by the buried object detecting unit 10 is an exploration target object (for example, a buried pipe P), and as an example, a detection signal detected in the excavation area E. "Number of detections", "Amplitude magnitude", etc. are set. When the determination information is "the number of detections of the detection signal", it can be determined that the buried object buried so as to cross the excavation area E is the buried pipe P based on the buried object detection information and the exploration position information. The number of detections is set. When the determination information is "large or small of the amplitude of the detection signal", a predetermined amplitude intensity is set within the range of the amplitude intensity that can be assumed for the buried pipe P.

The display unit 50 is composed of a display device such as an LCD (Liquid Crystal Display) or an EL (Electro Luminescence) display that utilizes the effect of passing a voltage through an organic or inorganic illuminant to emit light. In addition to the buried state information, the display unit 50 displays various displays related to the setting and operation of the exploration device 100 in a format that can be visually recognized by the operator according to the data type. Further, the display unit 50 can also be configured by a display device having a touch input function such as a touch panel. In this case, the operation setting unit 60 can be provided on the touch panel, and the hardware configuration such as the switch mechanism can be omitted.

The operation setting unit 60 is an input device such as an operation key, a switch mechanism such as a numeric keypad, and a position input device of a touch panel, and an operation signal when a worker performs a predetermined operation is output to the control unit 30. The operation setting unit 60 is predetermined when the buried object exploration work is started from the exploration start position, and is predetermined when the worker moves while scanning the excavation area E and the buried object exploration work is completed at the exploration end position. Be manipulated. This defines the exploration start time and exploration end time in the buried object exploration work.

Further, the operation setting unit 60 is subjected to a predetermined operation when adjusting the sensitivity of the buried object detection unit 10. For example, when the buried object exploration work is performed with the sensitivity of the buried object detecting unit 10 kept at the default value, the buried object P may not be detected depending on the depth of the buried object P. Therefore, by appropriately adjusting the sensitivity of the buried object detection unit 10, the buried pipe P can be detected accurately, and by analyzing the degree of signal strength obtained by the sensitivity adjustment, the buried pipe P is buried. You can know the depth.

Further, the operation setting unit 60 is operated when performing the buried object exploration work, and various information (excavation area E) for creating excavation area data which is two-dimensional or three-dimensional image data that can be displayed on the display unit 50. Information such as the shape of the area, the length of the area edge, the exploration start position, and the exploration end position) are set.

As an example of the excavation area data, when the excavation area E is rectangular as shown in FIG. 3B, the area setting information to be set includes the long side (buried water supply pipe P2) which is the area end of the excavation area E. The length of the side (the side in the direction intersecting the direction) and the length of the short side (the side parallel to the burial direction of the water supply pipe P2), the position information of the exploration start position and the exploration end position in the excavation area E can be mentioned. The buried state information creating unit 32 creates excavation area data that can be displayed on the display unit 50 based on these area setting information set by the operation setting unit 60. Since the shape of the excavation area E and the length of the area edge are different for each work site, the excavation area data according to the site is set before the excavation work.

The notification unit 70 is configured by individually or in combination of a display device such as an LED device, a ringing device that outputs a warning sound such as a buzzer sound, and a vibration device having a vibration function. For example, when the buried object exploration work is not performed, the notification unit 70 performs a predetermined notification based on the notification instruction from the execution determination unit 33. As a notification form by the notification unit 70, for example, in the case of an LED display device, lighting / blinking and color-coded display are performed. Accurately notify the contents.

<System processing operation>
Next, the processing operation of the buried object exploration system 1 according to the present embodiment will be described with reference to FIGS. 6 to 8.
The operations described below are presented with step elements in an exemplary order, and are not limited to the specific order in which they are presented. Therefore, the order of the flowcharts shown in FIGS. 6 to 8 may be changed as long as there is no contradiction in the processing results.

As shown in FIG. 6, first, the power of the exploration device 100 is turned on (ST1), the operation setting unit 60 is operated, and the area setting information corresponding to the excavation area E is input and set (ST2). Then, when the input of the area setting information is completed, the worker starts the buried object exploration work (ST3). In the buried object exploration work, the entire area in the excavation area E is scanned by the exploration device 100 from the exploration start position to the exploration end position.

Next, the control unit 30 determines whether or not the buried object exploration work has been completed (ST4), and if it determines that the buried object exploration work has been completed (ST4-Yes), the set area setting information is used. The excavation area data is created based on this (ST5).
On the other hand, when the control unit 30 determines that the buried object exploration work has not been completed (ST4-No), the control unit 30 loops the process of ST4 and repeats the process until the buried object exploration work is completed.

When the excavation area data is created in ST5, the control unit 30 is set in advance with the buried object detection information detected by the buried object detecting unit 10 and the exploration position information detected by the position detecting unit 20. Based on the determination information, the buried object determination process for determining whether or not the detected buried object is the buried pipe P is performed (ST6). The details of the buried object determination process will be described later with reference to FIG. 7.

Next, the control unit 30 creates burial state information that visualizes the burial state of the burial pipe P buried in the excavation area E based on the exploration target information acquired in the buried object determination process of ST6. The state information creation process is performed (ST7).
In the burial state information creation process, burial state information that is two-dimensional or three-dimensional data that reflects the burial state of the burial pipe P is created in the excavation area data based on the exploration object information and the excavation area data.

Next, the control unit 30 performs an exploration execution determination process for determining whether or not the buried object exploration work in the excavation area E has been performed based on the presence or absence of the exploration history information stored in the storage unit 40 (ST8). .. The details of the exploration execution determination process will be described later with reference to FIG.

After that, the control unit 30 determines whether or not all the predetermined processes based on the various information acquired in the buried object exploration work have been completed (ST9).

In ST9, when the control unit 30 determines that all the predetermined processes have been completed (ST9-Yes), the control unit 30 ends the processes.
On the other hand, when the control unit 30 determines that all the predetermined processes have not been completed (ST9-No), the control unit 30 identifies the processes that have not been completed (ST10), and again in order to execute the specified processes. Return to ST5 and execute only the processing that has not been completed.

Next, the buried object determination process will be described with reference to FIG. 7. The buried object determination process is mainly executed by the buried object determination unit 31 included in the control unit 30.

As shown in FIG. 7, the buried object determination unit 31 includes buried object detection information detected by the buried object detection unit 10, search position information detected by the position detection unit 20, and preset determination information. Based on the above, it is determined whether or not the detected buried object is the buried pipe P (ST61).

In ST61, when the buried object determination unit 31 determines that the buried pipe P is buried in the excavation area E (ST61-Yes), it depends on the detection position of the buried pipe P buried in the excavation area E. The buried object information and the exploration position information are output to the buried state information creation unit 32 (ST62) as the exploration target information, the buried object determination process is completed, and the process proceeds to ST7.
On the other hand, when the buried object determination unit 31 determines that the detection signal corresponding to the buried object is not detected in the excavation area E and the buried pipe P is not buried (ST61-No), it is buried in the excavation area E. A notification that the pipe P is not buried is output to the notification destination (ST63), the buried object determination process is completed, and the process shifts to ST7.

Next, the exploration execution determination process will be described with reference to FIG. The exploration execution determination process is mainly executed by the execution determination unit 33 included in the control unit 30.

As shown in FIG. 8, whether or not the execution determination unit 33 has performed the buried object exploration work in the excavation area E based on the presence or absence of the exploration history information such as the buried state information stored in the storage unit 40. Is determined (ST81).

In ST81, when the execution determination unit 33 determines that the buried object exploration work is being performed (ST81-Yes), the execution determination unit 33 ends the exploration execution determination process and shifts to ST9.
On the other hand, when the execution determination unit 33 determines that the buried object exploration work has not been performed (ST81-No), the execution determination unit 33 outputs a notification instruction for notifying the determination result to the notification unit 70 to perform a predetermined notification. It is executed (ST82), the exploration execution determination process is completed, and the process proceeds to ST9.

<Effect>
As described above, the buried object exploration system 1 according to the present embodiment includes an exploration device 100 including a buried object detecting unit 10 for detecting a magnetic field emitted from a buried object including an exploration object existing in the excavation area E. It is a system that performs the buried object exploration work in the excavation area E by using the position detection unit 20 that detects the exploration position information of the buried object detection unit 10 in the excavation area E, and the detection detected by the buried object detection unit 10. It is determined whether or not the buried object is an exploration target based on the buried object detection information based on the signal, the exploration position information, and the preset determination information, and when the buried object is an exploration object, it is buried. A buried object determination unit 31 that outputs object detection information and exploration position information as exploration object information is provided, and the buried object detection unit 10 is predetermined in a direction intersecting the scanning direction of the excavation area E with respect to the exploration device 100. A plurality of scan pitches are provided in parallel with each other.

As a result, the number of scans in the excavation area E can be reduced and the buried object exploration work can be easily performed, and the position, shape, etc. of the buried pipe P, which is the exploration target to be buried in the excavation area E, can be determined before excavation. Since it is possible to grasp during excavation, it is possible to prevent damage / breakage of the buried pipe P during excavation.

Further, in the buried object exploration system 1 according to the present embodiment, the exploration device 100 includes an attachment mechanism 103 to which the buried object detection unit 10 is attached and expands and contracts in a direction intersecting the scanning direction to adjust the scanning pitch.

As a result, the position of the buried object detection unit 10 can be easily set so that the scanning pitch becomes appropriate according to the excavation width of the excavation area E simply by expanding and contracting the mounting mechanism 103.

Further, in the buried object exploration system 1 according to the present embodiment, the determination information used by the buried object determination unit 32 is at least the number of detections of the detection signal detected by the buried object detection unit 10 and the amplitude intensity of the detection signal. It contains one of the judgment elements.

As a result, among the buried objects existing in the excavation area E, the buried pipe P to be the exploration target and other foreign substances can be easily distinguished.

Further, the buried object exploration system 1 according to the present embodiment reflects the exploration target information in the excavation area data created based on the area setting information regarding the excavation area E set in advance, and within the excavation area E. It is provided with a buried state information creating unit 32 that creates buried state information that is image data for visualizing the buried state of the exploration object to be buried.

As a result, by visually recognizing the buried state information, it is possible to grasp the position, shape, etc. of the buried pipe P, which is an exploration target to be buried in the excavation area E, before and during excavation. It is possible to prevent damage / breakage of the buried pipe P at the time.

Further, the buried object exploration system 1 according to the present embodiment includes a storage unit 40 that stores the buried state information as exploration history information, and the exploration device 100 includes a display unit 50 that displays the buried state information.

As a result, by visually recognizing the buried state information displayed on the display unit 50 mounted on the exploration device 100, the buried state of the buried pipe P, which is the exploration target existing in the excavation area E, is being excavated before and during excavation. Can be easily confirmed. Therefore, it is possible to prevent damage or damage to the buried pipe P during excavation by proceeding with the work while visually recognizing the buried state information or the like during the excavation work.

Further, the buried object exploration system 1 according to the present embodiment includes an execution determination unit 33 that determines whether or not the buried object exploration work has been executed in the excavation area E based on the exploration history information.

As a result, it is possible to determine whether or not the buried object exploration work in the excavation area E has been executed. Therefore, when the buried object exploration work is not executed, the worker is requested to execute the buried object exploration work. Can be urged to.

Further, the buried object exploration system 1 according to the present embodiment notifies the notification destination when it is determined as the determination result of the execution determination unit 33 that the buried object exploration work for the excavation area E is not executed. The notification unit 70 is provided.

As a result, the notification unit 70 notifies that the buried object exploration work has not been executed, so that the buried object exploration work in the excavation area E can be reliably executed.

Further, in the buried object exploration method according to the present embodiment, the buried object detecting unit 10 for detecting the magnetic field emitted from the buried object including the exploration target existing in the excavation area E intersects the scanning direction of the excavation area E. This is a method of performing a buried object exploration work in the excavation area E by using a plurality of exploration devices 100 provided in parallel with a predetermined scanning pitch in the direction, and exploration of the buried object detection unit 10 in the excavation area E. The buried object is an exploration target based on the process of detecting the position information, the buried object detection information based on the detection signal detected by the buried object detection unit 10, the exploration position information, and the preset determination information. When it is determined whether or not the buried object is an exploration target, the process of outputting the buried object detection information and the exploration position information as the exploration target information is included.

As a result, the number of scans in the excavation area E can be reduced and the buried object exploration work can be easily performed. In addition, since the position and shape of the buried pipe P, which is an object to be explored buried in the excavation area E, can be grasped before and during excavation, damage to the buried pipe P during excavation can be prevented. be able to.

1 Buried object exploration system 10 Buried object detection unit 20 Position detection unit 30 Control unit 31 Buried object judgment unit 32 Buried object status information creation unit 33 Execution judgment unit 34 Timing unit 40 Storage unit 50 Display unit 60 Operation setting unit 70 Notification unit 80 Power supply Part 90 Communication part 100 Exploration device 101 Main body part 102 Grip part 103 Mounting mechanism C Excavation construction equipment E Excavation area H Residential P1 Water distribution pipe P2 Water supply pipe R Road S1 First scanning path S2 Second scanning path

Claims (8)

In a buried object exploration system that performs buried object exploration work in an excavated area using an exploration device equipped with a buried object detection unit that detects a magnetic field emitted from a buried object including an exploration object existing in the excavated area.
A position detection unit that detects the search position information of the buried object detection unit in the excavation area, and a position detection unit.
It is determined whether or not the buried object is the exploration target based on the buried object detection information based on the detection signal detected by the buried object detection unit, the exploration position information, and preset determination information. Then, when the buried object is the exploration object, the buried object determination unit that outputs the buried object detection information and the exploration position information as the exploration object information, and the buried object determination unit.
With
A plurality of the buried object detection units are provided in parallel with respect to the exploration device at a predetermined scanning pitch in a direction intersecting the scanning direction of the excavation area.
Buried exploration system. The exploration device includes an attachment mechanism to which the buried object detection unit is attached and the scanning pitch can be adjusted by expanding and contracting in a direction intersecting the scanning direction.
The buried object exploration system according to claim 1. The determination information includes at least one determination element of the number of detections of the detection signal detected by the buried object detection unit and the amplitude intensity of the detection signal.
The buried object exploration system according to claim 1 or 2. The exploration target information is reflected in the excavation area data created based on the area setting information related to the excavation area set in advance, and the buried state of the exploration object buried in the excavation area is visualized. It is equipped with a buried state information creation unit that creates buried state information that serves as image data for the purpose.
The buried object exploration system according to any one of claims 1 to 3. A storage unit that stores the buried state information as exploration history information is provided.
The exploration device includes a display unit that displays the buried state information.
The buried object exploration system according to any one of claims 4. An execution determination unit for determining whether or not the buried object exploration work has been executed in the excavation area based on the exploration history information is provided.
The buried object exploration system according to claim 5. As a determination result of the execution determination unit, when it is determined that the buried object exploration work for the excavation area is not executed, a notification unit for notifying the notification destination is provided.
The buried object exploration system according to claim 6. A plurality of buried object detection units for detecting a magnetic field emitted from a buried object including an exploration object existing in the excavation area are provided in parallel at a predetermined scanning pitch in a direction intersecting the scanning direction of the excavation area. This is a buried object exploration method for exploring buried objects in the excavation area using the exploration device.
The process of detecting the exploration position information of the buried object detection unit in the excavation area and
Based on the buried object detection information based on the detection signal detected by the buried object detection unit and the exploration position information, it is determined whether or not the buried object is the exploration target, and the buried object is the exploration target. When it is an object, a process of outputting the buried object detection information and the exploration position information as exploration object information, and
including,
Buried object exploration method.

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