JP4043761B2 - Detecting elongate body and method for detecting pipeline information - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elongate sign body suitable for detecting information about pipelines and cables buried in the ground from the ground and a method for detecting pipeline information .
[0002]
[Prior art]
Currently, when newly installing underground underground pipelines, there is a possibility that existing piping may be laid, so it is necessary to investigate the documents recorded by the road administrator in advance, or to perform a partial excavation It was necessary to check the presence and location of buried objects.
In addition, in order to prevent damage during re-excavation along the pipeline containing the power / communication cables buried in the ground, for example, the type of cable is clearly shown between the ground and the pipeline as shown in FIG. A resin sign sheet may be embedded at the same time as the pipe laying. In this way, even if the pipe burial part is excavated again by road construction etc., it will be found that the pipe line is buried by being caught by the sign sheet during the excavation process, and the pipe line will be damaged. Can be prevented.
In addition, the ground surface is embedded with embedment marks color-coded according to the pipe manager symbol and pipe type at regular intervals along the pipe burial route so that the position of the buried object can be known. It was. Such prior art has been applied not only to electric power and communication lines but also to underground facilities and lines such as gas and water and sewage.
[0003]
[Problems to be solved by the invention]
In the case where a pipeline is newly established as described above, preliminary surveys and test excavation are conducted, but it may be found that the pipeline is laid in a route different from the route expected in the test mining etc. is there. In such a case, it is necessary to redesign or perform a large-scale test excavation, which is very time-consuming and delays the work period.
In the case of the buried sign sheet, it is actually excavated with heavy machinery, etc., and if it does not hit the sheet, it is not known that the pipeline is buried, and the information on the sheet is not visible, so it is found at the place where the pipeline is planned to be laid In such a case, it was necessary to review the pipeline laying route.
In addition, it is a fact that the heavy equipment stays up to the pipeline without noticing the buried sign sheet, which may damage the existing piping.
In addition, information on the manager's symbol, burial position, and pipe type can be obtained from the burial mark, but more information such as burial depth, number of pipe lines, cable type, laying time, laying contractor, etc. In addition, detailed information that is urgently needed for maintenance, disaster recovery, etc. could not be obtained, and it was necessary to examine the documents kept by the administrator.
The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily obtain information on buried pipes and cables, and to provide detailed information such as maintenance inspection history and cable types. Is to be able to confirm on-site.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is configured to form a sign long body by installing wireless response tags at predetermined intervals on a long body such as a tape or string. By irradiating electromagnetic waves to this wireless response tag, information stored in the wireless response tag in a non-contact manner, for example, embedded information such as cables and embedded pipelines, distance information from one end of a long body, or standard information Can be detected from the ground.
An RFID (Radio Frequency Identification) tag is known as a wireless response tag. The contactless recognition system using the RFID tag is a system that exchanges information with an IC memory built in the RFID tag wirelessly (electromagnetic wave), and can read and rewrite data without contact. It has been attracting attention as a replacement for bar codes used in physical distribution management, etc., and magnetic tapes used in cash cards, etc. Currently, the unit price has fallen due to mass production and has begun to spread rapidly.
[0005]
The configuration of the RFID non-contact type recognition system includes an “RFID tag” that is a basis for individual management, an “antenna” that relays communication, and a “reader” that reads / writes ID information of the RFID tag, The RFID tag incorporates an IC chip including a memory for storing ID information and a communication circuit, and a micro antenna.
The antenna is designed for efficient communication in combination with a reader. The reader includes an RF module and a control module, and writes data from the host computer to the RFID tag through the antenna and transmits ID information of the RFID tag to the host computer.
In addition, RFID tags that are activated by electromagnetic waves transmitted are becoming mainstream. Furthermore, since the tag communicates with the electromagnetic wave, it is possible to read and write the tag through earth and sand, water, and concrete.
[0006]
Detailed information necessary for maintenance and disaster recovery, such as administrator name, burial position, pipe type and number of pipes, cable type, laying time, laying contractor, work history, etc. Record it, for example, install it at a certain interval on a long tape made of resin, and embed it between the pipeline and the ground, or install it through the tape in the pipeline, as with the embedded marker sheet. Then, an electromagnetic wave having a natural frequency is transmitted from the antenna by the transmitting circuit at the site, and the above information stored in the memory storing the ID data is received by the RFID tag and returned from the ground to the ground in real time by the reader. It becomes possible to obtain information on buried pipelines and cables.
Since this RFID tag can rewrite data, it is possible to update information stored first, and to add or rewrite a maintenance history or the like. Further, since information can be written remotely, it is possible to write data after laying without writing data before laying.
[0007]
As a measure for existing piping, laying in one pipeline is suitable. If such a laying form is taken, the RFID tag can be laid without re-digging.
In this way, if a long object for buried object marking is installed, information on the buried pipeline can be obtained from the ground without investigating records or conducting a test excavation. It is possible to proceed to the next step, the maintenance work becomes easy, and it becomes easy to leave a history and the like.
In addition, even if a cable placed in a pipeline is damaged due to a disaster such as an earthquake, if a power-less RFID tag is used, the type of cable can be immediately grasped locally, and restoration work can be performed quickly. Is possible.
Further, the distance from the RFID tag can be measured by measuring the reception intensity of the electromagnetic wave returned from the RFID tag with a reader and analyzing the relationship between the reception intensity and the distance.
By measuring the distance, it is possible to know the depth of the tag, so if a long sign is laid in the pipe, the depth of the pipe will be determined. There is no risk of damaging the pipe line even if it is cut all at once.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing the structure of a labeling tape according to an embodiment of the present invention.
As shown in the figure, RFID tags 2 are attached to a long tape 1 at a predetermined interval. The tape is preferably made of resin such as polyethylene from the viewpoint of long-term use, but may be made of metal. Note that the shape is not a tape shape and may be a string shape.
The interval between the tags is preferably 0.5 to 5 m. That is, the communication distance of the RFID tag is currently about 6 m at the maximum, and considering that information can always be monitored on the route, an interval of 5 m or less is desirable, and if the interval is too large, the cost increases although it is inexpensive. Therefore, an interval of 0.5 m or more is desirable.
Currently, RFID tags that are commercially available include those in which an IC chip consisting of a memory storing ID information and a communication circuit and an ultra-small antenna are sandwiched and sealed between resin sheets, resin, silicon and glass There are things that are housed in a case made of steel, and these may be attached to the tape.
Alternatively, the resinous sheet for sealing may be formed into a long tape, and the IC chip and the small antenna may be sealed at a predetermined interval to form a labeling tape. In this way, it is possible to save the trouble of installing the RFID tag later.
[0009]
FIG. 2 shows an example of a method for laying the labeling tape.
As a laying method, as shown in FIG. 2, a method can be employed in which the marker tape 1 is inserted and installed in a pipe line 3 laid and laid.
Usually, a wire rod is often left in the pipe, and if this wire is used, a marker tape can be easily inserted even in an existing pipe. A parachute can be attached and blown into the pipe with high-pressure air.
With this laying method, there is a merit that it can be easily applied to existing pipelines, and in the unlikely event that the marking tape has to be replaced, it can be easily replaced. Also, when checking the buried position of the existing pipeline, if the marker tape is inserted through the pipeline, the buried position of the pipeline can be easily confirmed.
Furthermore, since it is possible to measure the distance to the RFID tag by measuring the reception intensity of the electromagnetic wave returned from the RFID tag with a reader and analyzing the relationship between the reception intensity and the distance, for example, FIG. As shown, if the buried object labeling tape is placed in the pipe, the depth of the pipe is known, so that it is possible to know in advance the excavable depth without damaging the pipe.
If a serial number is written from one side to the RFID tag of this labeling tape, the length of the tube from the manhole can be roughly known based on this number.
[0010]
FIG. 3 shows another example of a method for laying a labeling tape.
As shown in the figure, a method of embedding the buried object marking tape 1 at an arbitrary position between the pipe line 3 and the ground surface can be adopted in the same manner as a conventional marking sheet. In this case, it is possible to embed buried object marking tapes as many as the number of pipelines. However, only one buried object marking tape is laid on a plurality of pipelines, and information on the multiple pipelines is placed on the RFID tag. It is also possible to store them together.
As information stored in the RFID tag, for example, it is possible to rewrite or add information as well as an administrator name, burial position, pipe type and number of pipes, cable type, laying time, laying contractor. Information necessary for maintenance and disaster recovery, such as maintenance inspection history and cable replacement history, can be considered.
The RFID tag includes a battery type and a non-powered type, but a non-powered type is desirable from the viewpoint of long-term use.
[0011]
FIG. 4 shows another embodiment of the buried object labeling tape.
As shown in the figure, by marking the pipeline and cable information in letters and symbols on the buried object marking tape, it is visually confirmed that the pipeline has been buried when excavated and dug up. But it is convenient because it can be confirmed.
In addition, although said Example described the electric power and the communication line, it is possible to apply also about the gas and water and sewage pipes which are similarly buried underground.
[0012]
【The invention's effect】
As described above, the following effects can be obtained.
(1) By using a long sign body with a wireless response tag, it is possible to obtain information on buried pipes and cables accurately on-site, eliminating the need for preliminary surveys and test excavations by documents. It will be possible to proceed with construction accurately, since there will be no change of route afterwards.
Further, if the long sign body is inserted into an existing pipeline, the buried position of the existing pipeline can be easily confirmed, and test excavation or the like is not required. Furthermore, if the long object for buried object marking is buried between the buried object such as a pipe and the ground surface, the same function as that of a conventional marker sheet can be provided.
(2) Even during maintenance and recovery from disasters, detailed information such as maintenance inspection history, cable types, and laying routes can be confirmed on-site, making it possible to respond quickly. In addition, since information can be stored and transmitted as electronic information, a long-distance communication means such as a mobile phone is attached to the reader, and information is exchanged with a host computer that performs collective management. It can also be applied to network management systems.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a labeling tape according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a method for laying a labeling tape.
FIG. 3 is a diagram showing another example of a method for laying a labeling tape.
FIG. 4 is a diagram showing another example of a labeling tape.
FIG. 5 is a diagram showing an example of a sign sheet that has been used conventionally.
[Explanation of symbols]
1 Tape 2 RFID tag 3 Pipe line

Claims (2)

A long sign for laying in a pipe,
The long sign body is a radio response tag installed at a predetermined interval on a long object. By irradiating the radio response tag with electromagnetic waves, the radio response tag is contactlessly formed. An elongate sign body characterized in that embedded information such as stored cables or buried pipelines can be detected from the ground . A sign long body with wireless response tags installed at predetermined intervals is inserted through the pipe, and installed.
Irradiate electromagnetic waves to the wireless response tag, receive electromagnetic waves from the wireless response tag, and detect at least the buried position, buried depth, and buried length of the pipeline from the ground.
A method for detecting pipeline information.

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