JP4389814B2 - Pipeline search position specifying method, portable terminal, and pipeline search position specifying program - Google Patents

Description

  The present invention relates to a method for exploring the position of a specific part in a pipeline buried in the ground from the ground, a portable terminal that searches by the method, and a program thereof.

  Conventionally, when trying to find the position of a specific part of an embedded pipeline (for example, a joint position of a pipeline), the drawing created at the time of laying is carried to the site, and the ground point of the specific part based on the drawing And assumed that the part of the buried pipeline was underground at that point. In the drawing at the time of laying, the measurement result by the three-point survey of the specific part is specifically described, and the specific part is measured by measuring the distance from the three points used in the three-point survey on the ground with a tape measure when searching. I was trying to identify the ground point.

  However, due to changes in geography and environmental conditions after construction, the three points used in the three-point survey are lost, or even if there are three points, the initial construction is due to changes in geography and environmental conditions. There was a problem that the pipeline itself moved from the position of the time and could not be specified.

  By the way, subtle changes from the initial construction position do not lead to damage and degradation of the pipeline in a short period of time, but in the long term, unnecessary stresses are applied to each component of the pipeline. Therefore, measuring and grasping the shape of the pipeline laying path is very important in the maintenance of the pipeline. In addition, when a disaster such as an earthquake occurs, the shape of the pipeline laying path may change significantly. From this point of view, it is important to measure the shape of the pipeline laying path.

  Therefore, conventionally, the gyro unit is placed inside the pig body to measure the attitude of the gyro (pig body) relative to the earth coordinates during travel, and the pipeline laying path is determined from the distance traveled by the pig body and the gyro attitude. A method of calculating data indicating the shape of the pipe, specifically, coordinate data in the earth coordinate system of the pipeline laying route has been developed (see, for example, Patent Document 1).

JP 2004-333149 A

  The technique of the above-mentioned Patent Document 1 is a technique for obtaining a pipeline laying path shape to the last, and no attempt has been made to further utilize the coordinate data acquired by such technique.

  The present invention has been made to solve the above-described problems. Even if the actual position of the buried pipe is different from the actual position of the buried pipe, the pipeline has already been acquired. It is an object of the present invention to provide a search position specifying method, a portable terminal, and a search position specifying program capable of reliably specifying a search position using coordinate data in a coordinate system.

The pipeline search position specifying method according to the present invention pre-registers coordinate data in the earth coordinate system of the laying route of a pipeline buried in the ground in a portable terminal having a GPS function, When the search position in the pipeline is specified and the current position of the mobile terminal detected by the GPS function matches the specified search position , the mobile terminal informs the outside and informs the mobile terminal of the location. Coordinate data conversion in which the joint number assigned to each joint position of a plurality of buried pipes constituting the pipeline buried therein and the coordinate data in the earth coordinate system of the joint position of the joint number are stored in association with each other If the table is further registered in advance and the joint number is designated as the search position on the portable terminal, the coordinate data conversion table is referred to based on the joint number. To obtain the corresponding coordinate data, and performs the subsequent processes the coordinate data as a search position.

  In addition, the pipeline search position specifying method according to the present invention further registers map data including the pipeline in the mobile terminal in advance, and if the search position in the pipeline is designated on the mobile terminal, the map data The map based on the corresponding map data corresponding to the search position is displayed on the display means of the portable terminal, and at least the specified search position is displayed on the map.

  Further, the pipeline search position specifying method according to the present invention displays the current position of the portable terminal detected by the GPS function on a map.

  The pipeline search position specifying method according to the present invention is a method for schematically displaying the pipeline laying state on a map.

  The pipeline search position specifying method according to the present invention displays on the map a route from the current position of the mobile terminal detected by the GPS function to the designated search position.

  The pipeline search position specifying method according to the present invention is a data obtained by running a gyro pig equipped with a three-axis gyro in the pipeline in the earth coordinate system of the pipeline laying path. There is something.

  Further, the pipeline search position specifying method according to the present invention is such that the coordinate data in the earth coordinate system of the pipeline laying path is the latitude, longitude, and altitude of each position on the central locus of the buried pipe constituting the pipeline. Yes, (A) Altitude of road level point provided in the vicinity of the search position, (B) Altitude based on the coordinate data about the search position, and (C) Difference in height between the road level point and the road surface corresponding to the search position And (D) the depth from the road surface corresponding to the search position to the buried pipe based on the radius of the buried pipe acquired in advance, and the depth is notified to the outside.

  In addition, the pipeline search position specifying method according to the present invention is configured so that a level difference between a road level point and a road surface corresponding to the search position is set on a road level point provided on a road near the search position by setting a scale. Is obtained from the position read by, and the position read by a leveling instrument with a scale on the road surface corresponding to the search position.

The portable terminal according to the present invention includes a position detecting means for detecting the current position of the portable terminal by a GPS function, and a storage means for pre-registering coordinate data in the earth coordinate system of a pipeline laying path buried in the ground. And an input operation means for designating a search position in the pipeline, and whether the current position of the portable terminal detected by the position detection means matches the search position designated by the input operation means. When it is determined that the control means and the control means match, the control means is provided with a notification means for notifying the outside, and the storage means includes a plurality of buried pipes constituting the pipeline buried in the ground. A coordinate data conversion table in which the joint number assigned to each joint position and the coordinate data in the earth coordinate system of the joint position of the joint number are stored in association with each other is further registered in advance. When the joint number is designated as the search position from the input operation means, the control means refers to the coordinate data conversion table based on the joint number, obtains corresponding coordinate data, and obtains the coordinate data as the search position. The following processing is performed .

  In the mobile terminal according to the present invention, map data including a pipeline is further stored in the storage means in advance, and the control means sets the search position in the map data when the search position is designated by the input operation means. A map based on the corresponding corresponding map data is displayed on the display means, and at least a designated search position is displayed on the map.

  In the portable terminal according to the present invention, the control means displays the current position of the portable terminal detected by the GPS function on the map.

  Further, in the mobile terminal according to the present invention, the control means schematically displays the laying state of the pipeline on the map.

  In the mobile terminal according to the present invention, the control means displays a route from the current position of the mobile terminal detected by the GPS function to the designated search position on the map.

  Further, in the mobile terminal according to the present invention, the coordinate data in the earth coordinate system of the pipeline laying route is the latitude, longitude, and altitude of each position on the central locus of the buried pipe constituting the pipeline, and the control means Search based on the altitude in the coordinate data for the search position, the altitude of the road surface corresponding to the search position obtained by field survey at the search position of the pipeline, and the radius of the buried pipe acquired in advance The depth from the road surface corresponding to the position to the buried pipe is obtained, and the depth is notified to the outside by the notification means.

  The portable terminal according to the present invention is configured such that the notification unit is any one or a combination of a buzzer, a lamp, a display unit, and a synthesized voice output unit that reads out character data having contents to be notified.

  The pipeline search position specifying program according to the present invention is for causing a computer to function as control means for any one of the portable terminals described above.

  As described above, according to the present invention, when the mobile terminal reaches the search position by inputting the search position on the mobile terminal having the GPS function, the mobile terminal notifies the outside to that effect. The search position can be specified from the ground in a short time without drawing.

Embodiment 1 FIG.
FIG. 1 is a conceptual diagram illustrating a pipeline search position specifying method according to the first embodiment of the present invention.
In general, the pipeline search position specifying method of this example is embedded in the portable terminal 1 having a GPS function (a function of receiving radio waves from a GPS satellite and measuring coordinates of the current position) in the ground. Coordinate data in the earth coordinate system of the installed route of the pipeline 21 is registered in advance. When a searcher carrying the mobile terminal 1 specifies a search position on the mobile terminal 1, the current position and the search position of the mobile terminal 1 (joint position in the example of FIG. 1) are displayed on the map including the search position. A screen showing 21a is displayed on the display means 11, and when the mobile terminal 1 of the searcher who has moved according to the display reaches the search position, the searcher is notified by a buzzer or the like.

  Here, the coordinate data is obtained by running a gyro pig equipped with a three-axis gyro as disclosed in, for example, Patent Document 1 in a pipeline 21 such as gas, water, sewage or the like to be searched. It is what was done. Here, the gyro pig calculates the coordinate data in the earth coordinate system of the pipeline laying path as described above. This coordinate data is specifically coordinate data (three-dimensional absolute coordinates (latitude, longitude, altitude)) in the earth coordinate system at each position on the central locus 22 of the buried pipe 21b constituting the pipeline 21.

  The gyro pig has a function of detecting the joint position of the buried pipe 21b constituting the pipeline 21, and the joint position obtained by the gyro pig and a drawing as shown in FIG. It is possible to specify the three-dimensional absolute coordinates of each joint position by collating with the joint positions apparent from The coordinate data conversion table described later is created based on this principle. In addition, it is not restricted to a joint position, The three-dimensional absolute coordinate of a specific site | part can also be specified now by the data collation with the inspection pig and gyro pig which is a well-known technique.

FIG. 2 is a block diagram showing a configuration of the mobile terminal according to Embodiment 1 of the present invention.
The mobile terminal 1 is registered with display means 11 for performing various displays such as a map around the search position and a mark indicating the search position, an input operation means 12 for performing various inputs such as search position input, and a map database. Storage means 13, position detection means 14 for detecting the current position of the portable terminal 1 by the GPS function, notification means 15 for notifying the outside when the portable terminal 1 is located at the search position, And a control means 16 for controlling the mobile terminal 1 in an integrated manner.

  The storage means 13 includes coordinate data 13a in the earth coordinate system of the laying route of the pipeline 21 buried in the ground, a map database 13b for storing map data, a coordinate data conversion table 13c, and processing according to the present invention. Is stored in the pipeline search position specifying program 13d.

FIG. 3 is a diagram showing an example of the coordinate data conversion table.
The coordinate data conversion table 13c includes a joint number assigned in advance to each joint position of a plurality of buried pipes constituting the pipeline 21 buried in the ground, and coordinates in the earth coordinate system of the joint position of the joint number. The data is stored in association with each other.

  The notification unit 15 is configured by any one or combination of a buzzer, a lamp, a display unit 11 and a synthesized voice output unit that reads out the content to be notified.

  The control means 16 operates based on the search position specifying program 13d stored in the storage means 13.

  FIG. 4 is a flowchart showing the flow of processing according to the first embodiment. Hereinafter, the operation of the present embodiment will be described with reference to FIG.

  Here, FIG. 5 is a drawing created when the pipeline is laid. In the drawing, the laying state of the pipeline 21 and the central locus 22 of the plurality of buried pipes 21b constituting the pipeline 21 are drawn on the map, and the joint positions of the buried pipes 21b constituting the pipeline 21 are respectively shown. The joint number is indicated. In addition, the results of three-point survey of joint numbers 3, 7, and 11 are described. Moreover, the center locus | trajectory 22 of the buried pipe 21b which comprises the pipeline 21 is described. In the following, an example in which the position of the joint number 5 is to be specified in the construction for moving the position of the buried pipe 21b from the joint number 5 to the joint number 11 on this drawing as shown in FIG. The operation will be described below.

  The searcher carries the portable terminal 1 in which the coordinate data 13a related to the pipeline 21 to be searched is registered in advance, and goes to the vicinity of the search position based on the drawing. An initial screen is displayed on the display means 11 of the portable terminal 1 (S1), and an operation for calling an input screen for inputting a search position is performed on the initial screen (S2). Then, the control means 16 which detected this operation displays the search position input screen on the display means 11 (S3). The search position input screen is a screen that prompts input of a search position, and in this example, is a screen that prompts input of a joint number of the pipeline 21. When the target joint number is input by the searcher according to this screen (S4), the control means 16 that has detected this input refers to the coordinate data conversion table 13c based on the input joint number, and the corresponding coordinate data. Is acquired (S5). In this case, the joint number “5” is input, and coordinate data (x5, y5, z5) is acquired from the coordinate data conversion table 13c (see FIG. 3).

  And the control means 16 acquires applicable map data corresponding to the position specified from coordinate data (x5, y5, z5) from the map database 13b (S6). Then, a search position display screen as shown in FIG. 7 composed of a map based on the acquired map data is displayed on the display means 11 (S7).

FIG. 7 is a diagram illustrating an example of a search position display screen.
On the search position display screen, the laying state of the pipeline 21 (a plurality of buried pipes 21b of the pipeline 21, the central locus 22 of the pipeline 21, and the joint number) is schematically displayed on the map. It is a screen on which a position and a joint position which is a search position are displayed. The display of the search position display screen is based on the processing in the control unit 16. In this display, the control unit 16 displays the central locus 22 of the pipeline 21 with a dotted line based on the coordinate data 13 a stored in the storage unit 13. In addition to the line display, based on the coordinate data 13a and the radius of the buried pipe 21b, the laying shape of the pipeline 21 buried in the ground is schematically displayed, and on the map based on the coordinate data conversion table 13c. The joint number is displayed at the position. The radius of the buried pipe 21b may be registered in the storage unit 13 in advance or may be input from the input operation unit 12.

  Further, the current position mark 24 is displayed at the corresponding position on the map corresponding to the current position detected by the position detecting means 14, and the search position mark 25 is displayed at the corresponding position on the map corresponding to the coordinate data acquired at step S5. Flashes.

  By the way, the position detection unit 14 periodically calculates the current position of the mobile terminal 1, and the calculation result is output to the control unit 16. The control means 16 periodically checks whether or not the current position from the position detection means 14 matches the search position (S9). Based on this, the search position display screen is updated (S7). That is, when the searcher moves toward the search position according to the search position display screen and the current position of the mobile terminal 1 changes, the display of the search position display screen is updated based on the changed position. ing.

  When the current position of the mobile terminal 1 matches the search position, an arrival mark 26 as shown in FIG. 8 is displayed and a buzzer is sounded to notify the searcher that the search position has been reached ( S9).

  As described above, according to the first embodiment, the mobile terminal 1 is carried to the search position approximately predicted from the map created at the time of laying, and the search position is input on the mobile terminal 1, thereby allowing the mobile terminal 1 to When 1 reaches the search position, the fact is notified so that the search position can be specified from the ground without a drawing. Note that, for example, a buzzer may be sounded not only when the search position is reached but also when the search position is approached, and the volume may be increased as the position approaches. As described above, since the position specification becomes much easier than in the prior art, it is possible to shorten the time until the position is specified.

  Further, since a map is displayed on the display means 11 and a search position is displayed on the map, it is possible to know from the display screen where the search position is. Further, since the current position of the mobile terminal 1 is also displayed, it is easy to grasp the relative positional relationship up to the search position. Furthermore, since the laying state of the pipeline 21 (a plurality of buried pipes 21b of the pipeline 21, the central locus 22 of the pipeline 21, and the joint number) is also schematically displayed, it can be confirmed whether there is an error in the search position, The piping situation before and after the search position can be confirmed.

  Further, since the coordinate data conversion table 13c is registered in the storage means 13 in advance, it is only necessary to input the joint number when specifying the search position, and the search position specifying operation is simple.

  In the first embodiment, the current state of the mobile terminal 1 is displayed on the map on which the laying state of the pipeline 21 (the plurality of buried pipes 21b of the pipeline 21, the central locus 22 of the pipeline 21, and the joint number) is illustrated. Although the position and the search position are displayed, the laying state does not necessarily have to be displayed, and the position can be specified if at least the search position is displayed on the map.

  In the first embodiment, the case where the search position is the joint position has been described as an example. Of course, any position other than the joint position may be used. In this case, the coordinate data of the position itself on the portable terminal 1 is acceptable. You can enter in

  In the first embodiment, the current position and the search position of the portable terminal 1 are displayed on the map showing the laying state of the pipeline 21. Further, the search is performed from the current position of the searcher. The route to the position may be displayed. This can be realized by storing a conventionally known program for performing this kind of route calculation in the storage means 13 and processing by the control means 16 in accordance with this program. The route display in this case is not limited to the case where the route is displayed near the search position based on the map created at the time of laying, and may be displayed from the station nearest to the search position, for example. Thus, after reaching the nearest station, it is possible to reach the search position by simply walking according to the route display while looking at the display on the portable terminal 1, which is extremely convenient.

  In addition, since the present example effectively uses the acquired data obtained by the gyropig, which is a technology that has already been constructed, it can be realized without burdening the development of the portable terminal 1 of the present invention.

Embodiment 2. FIG.
In other words, the mobile terminal 1 according to the first embodiment can specify the planar position on the map, but the second embodiment can also specify the embedded depth of the embedded pipe 21b. The embedment depth is usually described in the drawing at the time of laying. However, the height of the road surface 31 may change due to road embankment, road widening or refurbishment. It is effective for.

  Since the block diagram of the portable terminal 1 of Embodiment 2 is the same as that of FIG. 2, illustration and description are omitted.

  As described above, the coordinate data in the earth coordinate system of the laying route of the pipeline 21 is coordinate data (three-dimensional absolute coordinates (latitude, longitude, altitude)) in the earth coordinate system at each position on the central locus of the buried pipe 21b. is there. In the second embodiment, among the three components of the coordinate data, the “elevation” is used to specify the embedding depth of the embedding pipe 21b. This will be specifically described below.

FIG. 9 is an explanatory diagram of the specific principle of the burying depth of the buried pipe.
The embedment depth of the buried pipe 21b is determined by (A) the elevation of the road level point 23 provided in the vicinity of the search position, (B) the elevation based on the coordinate data about the search position, and (C) the road level point 23 and the search. Based on the height difference from the road surface 31 corresponding to the position and (D) the radius r of the buried pipe 21b acquired in advance, the buried depth from the road surface 31 corresponding to the search position to the buried pipe 21b is obtained. More specifically, it is obtained by subtracting the height difference between the road level point 23 and the road surface 31 corresponding to the search position and the radius r of the buried pipe 21b from the elevation difference.

  Here, the altitude difference is obtained by subtracting (B) from (A), which is known data, and the radius r of the buried pipe 21b is also known. The height difference from the road surface 31 corresponding to is obtained by surveying at the site. As shown in FIG. 9, first, the height difference is obtained by setting up a box measure 32 as a measure on the road level 23 provided on the road in the vicinity of the search position, and reading it with the level 33 to obtain the distance b. In addition, a box scale 32 is set on the road surface 31 corresponding to the search position, and the distance a is obtained by reading with the leveling means 33, and the difference in height (ab) between the distance a and the distance b is obtained. To get.

Next, the operation at the actual site using the mobile terminal 1 will be described. Here, the case where the embedment depth of the embedment pipe 21b with the joint number 5 is obtained as in the first embodiment will be described as an example.
First, the joint position of joint number 5 is specified by the procedure of the first embodiment. On-site surveying is performed on the road surface 31 on the identified joint position as described above, and the height difference between the road level point 23 and the road surface 31 is obtained. Then, the input operation means 12 of the portable terminal 1 is operated to perform a screen calling operation for obtaining the embedment depth. When the control unit 16 of the portable terminal 1 recognizes the calling operation, the control unit 16 displays a corresponding screen on the display unit 11. This screen is a screen that prompts the user to input the altitude of the road level point 23, the height difference, and the radius of the buried pipe 21b. When the searcher inputs according to this display, the control means 16 calculates the embedment depth based on the input data.

  That is, the altitude difference is obtained from the altitude of the road level 23 and the altitude (corresponding to z5 in FIG. 3) based on the coordinate data of the joint number 5, and the embedding depth is calculated from the altitude difference and the input altitude difference and radius. Is calculated. Then, the calculated embedment depth is displayed on the display means 11 as shown in FIG.

  According to the second embodiment, the same operational effects as those of the first embodiment can be obtained, and the embedding depth of the embedding pipe 21b can be specified. As a result, it is possible to grasp how much digging should be carried out, so that the time for digging work can be shortened, and accidents such as digging more than necessary and damaging the buried pipe 21b can be prevented. Become.

It is a conceptual diagram explaining the search position specification method of the pipeline of Embodiment 1 of this invention. It is a block diagram which shows the structure of the portable terminal of Embodiment 1 of this invention. It is the figure which showed an example of the coordinate data conversion table. It is a flowchart which shows the flow of a process of this Embodiment 1. It is the figure created at the time of pipeline construction. It is a figure which shows the pipeline after moving. It is a figure which shows an example of a search position display screen. It is a figure which shows an example of the search position display screen when it arrives at a search position. It is explanatory drawing of the specific principle of the burial depth of a burial pipe. It is a figure which shows an example of the screen which displayed the embedment depth further on the screen of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile terminal 11 Display means 12 Input operation means 13 Storage means 13a Coordinate data 13b Map database 13c Coordinate data conversion table 13d Search position specifying program 14 Position detection means 15 Notification means 16 Control means 21 Pipeline 21a Search position (joint position)
21b Buried pipe 22 Pipeline center locus 23 Road level mark 24 Current position mark 25 Search position mark 26 Arrival mark 31 Road surface 32 Box measure (standard scale)
33 Standards

Claims (16)

The coordinate data in the earth coordinate system of the laying route of the pipeline buried in the ground is registered in advance in the portable terminal having the GPS function, and the search position in the pipeline is designated on the portable terminal. When the current position of the mobile terminal detected by the GPS function matches the searched position, the mobile terminal notifies the outside to that effect ,
The portable terminal is associated with a joint number assigned to each joint position of a plurality of buried pipes constituting a pipeline buried in the ground, and coordinate data in the earth coordinate system of the joint position of the joint number. The coordinate data conversion table stored in advance is registered in advance, and when a joint number is designated as the search position on the portable terminal, the coordinate data conversion table is referred to based on the joint number, and the corresponding A method for specifying a search position of a pipeline , comprising: obtaining coordinate data and performing the subsequent processing using the coordinate data as the search position.   When map data including the pipeline is further registered in advance in the mobile terminal, and a search position in the pipeline is designated on the mobile terminal, a corresponding map corresponding to the search position in the map data. 2. The pipeline search position specifying method according to claim 1, wherein a map based on the data is displayed on the display means of the portable terminal, and at least the designated search position is displayed on the map.   3. The pipeline search position specifying method according to claim 2, wherein the current position of the mobile terminal detected by the GPS function is further displayed on the map. 4. The pipeline search position specifying method according to claim 2 , wherein the pipeline installation state is schematically displayed on the map.   The pipe according to any one of claims 2 to 4, wherein a route from the current position of the mobile terminal detected by the GPS function to the designated search position is displayed on the map. Line search position identification method. The coordinate data in the earth coordinate system of the laying route of the pipeline is data obtained by running a gyro pig having a three-axis gyro in the pipeline. 6. The pipeline search position specifying method according to any one of the above. The coordinate data in the earth coordinate system of the laying route of the pipeline is the latitude, longitude and altitude of each position on the central locus of the buried pipe constituting the pipeline,
(A) an elevation of a road level point provided in the vicinity of the search position; (B) an elevation based on the coordinate data for the search position; and (C) a road surface corresponding to the road level point and the search position. And (D) obtaining the depth from the road surface corresponding to the search position to the buried pipe based on (D) the radius of the buried pipe obtained in advance,
7. The pipeline search position specifying method according to claim 1, wherein the depth is notified to the outside . The difference in height between the road level point and the road surface corresponding to the search position corresponds to the position read by a leveling tool on a road level point provided on the road near the search position and the search position. searching location method according to claim 7 Symbol mounting of the pipeline and obtains, from the position read by the leveling instrument make a leveling rod on the road surface. Position detecting means for detecting the current position of the portable terminal by a GPS function;
Storage means in which coordinate data in the earth coordinate system of the laying path of the pipeline buried in the ground is registered in advance;
Input operation means for designating a search position in the pipeline;
  Control means for determining whether or not the current position of the portable terminal detected by the position detection means matches the search position specified by the input operation means;
An informing means for informing the outside when it is determined by the control means to match,
The storage means corresponds to a joint number assigned to each joint position of a plurality of buried pipes constituting a pipeline buried in the ground, and coordinate data in the earth coordinate system of the joint position of the joint number. The coordinate data conversion table stored in advance is further registered in advance, and when the joint number is designated as the search position from the input operation means, the control means stores the coordinate data conversion table based on the joint number. A portable terminal characterized by referring to the corresponding coordinate data and performing the subsequent processing using the coordinate data as a search position. In the storage means, map data including the pipeline is further stored in advance, and when the search position is designated by the input operation means, the control means corresponds to the map corresponding to the search position in the map data. The mobile terminal according to claim 9, wherein a map based on data is displayed on the display means, and at least the designated search position is displayed on the map . The mobile terminal according to claim 10 , wherein the control means further displays a current position of the mobile terminal detected by the GPS function on the map . The mobile terminal according to claim 10 or 11 , wherein the control means schematically displays the laying state of the pipeline on the map. 13. The control unit according to claim 10, wherein a route from the current position of the mobile terminal detected by the GPS function to the designated search position is displayed on the map. The mobile terminal according to Crab . The coordinate data in the earth coordinate system of the laying route of the pipeline is the latitude, longitude, and altitude of each position on the central locus of the buried pipe constituting the pipeline, and the control means is the coordinates for the search position. Based on the altitude in the data, the altitude of the road surface corresponding to the search position obtained by field survey at the search position of the pipeline, and the radius of the buried pipe acquired in advance, the search position The portable terminal according to any one of claims 9 to 13, wherein a depth from a corresponding road surface to a buried pipe is obtained, and the depth is notified to the outside by the notification means . 15. The notification unit according to claim 9, wherein the notification unit includes any one or a combination of a buzzer, a lamp, the display unit, and a synthesized voice output unit that reads out character data of contents to be notified. The portable terminal as described in. A pipeline search position specifying program for causing a computer to function as the control means of the portable terminal according to any one of claims 9 to 15.

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