JP2003004519A - Damage prevention monitoring system for buried pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring system preventing a buried pipe from damage occurrence, which enables wide area monitoring as well as easier setting without necessity of reequipping to smoothly handle damage prevention after a risk is detected. SOLUTION: In the system, an auxiliary pipe 2 is provided in the vicinity of an underground buried pipe 1, and plural vibration detectors 3 are disposed at certain intervals inside the auxiliary pipe 2. A detection signal detected by the vibration detectors 3 is converted into a vibration frequency property to be transmitted to a monitoring center via a relay station 4 and a remote station 5. Thus, the monitoring center recognizes that a danger of breakage impends over the buried pipe, based on the received vibration property and the vibration detector position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damage prevention monitoring system capable of detecting the possibility of damage to a buried pipe.

[0002]

2. Description of the Related Art Underground pipes such as gas pipes and water pipes are difficult to grasp directly from the ground because their positions in the ground are difficult to grasp. Various monitoring systems have been proposed in the past to deal with this.

[0003] First, when a signal for monitoring is applied from a transmitter to the buried pipe itself to be monitored and the signal is received by a receiver installed at a distant position, the buried pipe is damaged. There is a monitoring method to detect the damage to the buried pipe after the fact that the voltage received by the receiver has dropped. According to this, since it is a post-detection, it takes a lot of effort to restore the damaged portion, and in a situation where a secondary disaster immediately occurs due to the damage, it is extremely difficult to avoid the disaster. is there.

Therefore, Japanese Unexamined Patent Publication No. 7-264758,
As disclosed in Japanese Patent Laid-Open No. 7-294233, there is proposed a damage prevention monitoring system that detects the possibility of damage to a buried pipe before it is damaged. In these proposals, at the time of burying the buried pipe or after the burial, a monitoring member is arranged in the vicinity of the buried pipe so as to surround it, and a plurality of monitoring members are provided along the longitudinal direction of the buried pipe. Deploy signal lines,
By monitoring the disconnection of the signal line due to the damage of the monitoring member, the buried pipe is prevented from being damaged.

[0005]

According to the above-mentioned conventional technique, since the monitoring member is arranged around the buried pipe, it is necessary to excavate the circumference of the buried pipe at the time of laying to secure a space for arrangement. There is a problem that the construction time becomes long and a great construction cost is required. Also, in order to detect the possibility of damage to the buried pipe, it is premised that the monitoring member installed around the buried pipe is damaged, so once the monitoring member is damaged, it cannot be reused. There is also a problem that re-equipment requires a great deal of cost and time.

Further, in such a monitoring system, it is not possible to accurately detect the damaged portion of the monitoring member, and the time from the damage of the monitoring member to the actual damage of the buried pipe is short. However, because it is not possible to determine what causes the monitoring member to be damaged, etc., when monitoring over a wide area, even if the possibility of damage is detected, smooth measures can be taken to prevent damage. There is a problem that you cannot do it.

Therefore, it is the current situation that a large number of personnel are deployed over a wide area to monitor high-pressure gas pipes, which are particularly important to monitor, by patrol vehicles day and night. This causes a great deal of labor and labor costs, which is a problem.

The present invention has been proposed in order to cope with such a situation, and is a monitoring system for preventing damage to a buried pipe, which enables monitoring over a wide area in particular. In addition, it is easy to install, does not need to be re-equipped, and it is possible to smoothly deal with damage prevention after detecting the possibility of damage, and further it is possible to reduce labor and labor cost. The purpose is to propose a system.

[0009]

In order to achieve the above object, the buried pipe damage prevention monitoring system according to the present invention comprises:
It has the following features.

The invention according to claim 1 is characterized in that an accessory pipe is arranged in close proximity to the underground pipe, and a vibration detector for detecting vibration around the buried pipe is provided at a predetermined interval in the accessory pipe. A detection signal from a vibration detector is a damage prevention monitoring system for a buried pipe that detects the possibility of damage to the buried pipe, wherein the vibration detector detects the vibration based on a change in the frequency characteristic of vibration. It is characterized by comprising information processing means for judging the possibility of damage to the buried pipe.

According to a second aspect of the present invention, on the basis of the first aspect of the invention, the information processing means is provided when the vibration level of a specific frequency or more exceeds a reference level with respect to the detected power spectrum of the vibration. It is determined that the possibility of damage is high.

According to a third aspect of the present invention, on the basis of the first aspect of the invention, the information processing means is based on a temporal change of a vibration level above a specific frequency with respect to the detected power spectrum of the vibration. Characterized by determining the possibility of damage.

According to a fourth aspect of the present invention, based on the first aspect of the invention, the vibration detector includes a ring-shaped support member fixed to the inner surface of the accessory pipe, and the support member includes the accessory member. A mounting hole penetrating in the axial direction of the pipe is formed, and the top of the conical fixture is inserted into the mounting hole and screwed to bring the bottom of the fixture into contact with the inner surface of the accessory pipe, The support member is fixed to the accessory pipe.

The invention according to claim 5 is the damage prevention monitoring system according to any one of claims 1 to 4, wherein the vibration detector provided in a predetermined section is provided in each section. In addition to being connected to the relay processing device in the base, the information processing means is provided for transmitting information to the information processing means via each relay processing device. In the relay processing device, the detection signal from each vibration detector is primary. It is characterized in that the processed information and the primary processed information are transmitted to an adjacent relay processing device together with the installation position information of each vibration detector.

According to the invention of claim 6, on the premise of the invention of claim 5, the information transmitted via the relay station provided in a predetermined area is stored in a remote base provided for each area. Of the information processing apparatus, the information processing apparatus collects the information in the monitoring center, and the monitoring center gives the possibility determination and the handling instruction based on the determination.

The invention according to claim 7 is based on the invention of claim 5, wherein the relay base has a waterproof-treated casing buried under the ground, and the relay processing device is provided in the casing. It is characterized by

The invention according to claim 8 is based on the invention of claim 6, wherein the remote base is provided with the information processing means in a building installed on the ground, and is used for power-receiving equipment for commercial power and transmission. It is characterized in that at least antenna equipment is provided.

The invention according to each claim having the above-described structure has the following functions. According to a first aspect of the present invention, a plurality of vibration detectors are provided at predetermined intervals in the vicinity of the buried pipe to be monitored, and the buried pipe is based on the vibration around the buried pipe detected by the vibration detector. It is to monitor the approach of other construction machines, which may be damaged, at a remote location, and it is possible to monitor completely without contact.

When the vibration around the buried pipe is detected, the detection signal always contains a slight vibration, and when a large vehicle passes over the buried pipe, a vibration with a large amplitude is temporarily generated. Depending on the intensity of the detected vibration, it is not possible to accurately grasp the situation where other construction machinery that may cause damage is approaching the buried pipe to be monitored, depending on only the detected vibration intensity. Can not. On the other hand, if the frequency characteristic of the detection signal is obtained and monitored, if the excavator or the like approaches and the possibility of damage increases, the output mode of the frequency characteristic greatly changes. By using the change in numerical characteristics as a criterion, it is possible to detect the possibility of damage to the buried pipe.

By individually monitoring each vibration detector, it becomes possible to accurately detect a position where the possibility of breakage increases due to the position where each vibration detector is arranged, and the vibration characteristic The change can be detected stepwise by the presence of a potentially damaging source of vibration at a location remote from the buried pipe being monitored, and this can be detected in a stepwise manner, which allows for potential damage at an early stage. Perception is possible. Therefore, it is possible to promptly and smoothly take measures against damage prevention from the detection of the possibility of damage, which enables collective monitoring over a wide range.

To lay this monitoring system, first,
It is necessary to place the auxiliary pipe inside which the vibration detector is placed close to this buried pipe during or after the buried pipe is buried. The auxiliary pipe may be arranged before the top soil is covered with the soil, and if the embedded pipe is laid, a small area on the embedded pipe may be excavated and the auxiliary pipe may be arranged there. Therefore, it is possible to suppress the cost and working time for the construction to be low as compared with the conventional monitoring member arranged around the buried pipe.

The invention according to claims 2 to 3 has the following characteristic actions in addition to the above-mentioned actions. In these inventions, the power spectrum of the detected vibration is obtained as the above-mentioned frequency characteristic, and this is used as a parameter for judging the possibility of damage. Since the output spectrum of the detected vibration has a characteristic shape according to the type of the vibration source, by grasping this in advance,
It is possible to presume the cause of the detected vibration, so that it is possible to smoothly deal with the damage after the possibility of damage is detected.

For example, when a steel pipe machine or an excavating machine similar thereto is approaching, the output form above a specific frequency (20 to 30 Hz or more) of the power spectrum is a substantially flat form without a large peak component. And its vibration level gradually increases. Also, when an excavator with a vibration source at the tip approaches, such as a propulsion ultimate propulsion machine, the power spectrum shows a peak component at a frequency peculiar to the vibration source, and the peak component rises with the approach. To do. In other words, by grasping in advance that the power spectrum of the detected vibration exhibits such characteristics of the output form, and monitoring the change according to the characteristics of the output form, the cause of the vibration can be grasped. And it becomes possible to judge together that it has entered the dangerous area. In particular, the method of determining the possibility of damage when a steel pipe machine approaches is to obtain a characteristic value from the vibration level above a specific frequency, and to judge that there is a high possibility when this exceeds a reference value. Applicable. In addition, by obtaining the temporal change in the vibration level above a specific frequency (rising speed, etc.), it is possible to know the traveling speed of the steel tube excavator, and prevent damage from occurring depending on the situation. It will be possible.

[0024] The fourth aspect specifies a specific configuration for disposing the vibration detector. The vibration detector provided with the ring-shaped support member is inserted into the accessory pipe, and the conical fixture provided on the ring-shaped support member is screwed. As a result, when inserting into the accessory pipe, the fixture that is slightly inclined and held loosely in the mounting hole of the support member is firmly fixed to the mounting hole, so that the bottom of the conical fixing device is It rises in the radial direction and comes into contact with the inner surface of the accessory pipe. As a result, the support member is fixed to the inner surface of the accessory pipe.

The present invention according to claims 5 to 8 specifies a specific configuration for laying the above-mentioned monitoring system over a wide monitoring target area.

A plurality of vibration detectors provided in a predetermined section are connected to a relay processing device in a relay station provided for each section, and the relay processing devices are connected to each other via a LAN so that each vibration detector The detection signal is transmitted to the information processing means via the relay processing device. The relay processing device performs primary processing (conversion into frequency characteristics, etc.) on the detection signals sent from the plurality of vibration detectors in real time, and outputs this together with the position information of each vibration detector. At the same time, it receives the output information from the relay processing device in one adjacent section, outputs this together with the output information of the relay processing apparatus to the relay processing device in the other adjacent section, and finally the information processing means. The output from each relay processing device is transmitted to.

Then, the outputs of all the relay processing devices in the predetermined area are sent to the information processing device of the remote base provided for each area, and the outputs of the information processing devices of each area are collected in the monitoring center. Here, the information processing device at the remote base and the central information processing device provided in the monitoring center serve as the above-mentioned information processing means, and the above-mentioned possibility of damage is determined. In addition, the monitoring center gives coping instructions to the site based on the judgment of the possibility of damage.

The above-mentioned relay station is a facility buried under the ground to facilitate the connection with the signal line and the information transmitting means in the auxiliary pipe arranged in the ground, and the information transmitting means to the ground. The wire is prevented from being broken by eliminating the exposure of. In addition, it is provided with a casing that is waterproofed in order to maintain the performance of the relay processing device provided inside.

Since the above-mentioned remote base is an information transmission base to the monitoring center, it is a ground facility equipped with a transmitting antenna facility and also a power supply base to the relay base and the vibration detector. Equipped with a commercial power supply facility.

[0030]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. [System Overview] FIG. 1 is an explanatory diagram showing an overview of the monitoring system of the present invention. Reference numeral 1 is a buried pipe buried in the ground to be monitored. Close to the upper space of this buried pipe 1,
The accessory pipe 2 is arranged. The material of the auxiliary pipe 2 is not particularly limited, but a PE pipe is suitable in consideration of ease of handling during construction, corrosion resistance in the ground, and the like. In the accessory pipe 2, vibration detectors 3 for detecting vibration around the buried pipe are provided at predetermined intervals l (for example, 5 m). This accessory tube 2
As for the arrangement of the vibration detector 3, an auxiliary pipe having a length corresponding to the interval 1 is prepared, the vibration detector 3 is arranged in advance in the pipe, and the necessary number of pipes are arranged along the embedded pipe 1. Let me
The signal lines from the vibration detector 3 are sequentially passed through the accessory pipes 2, and then the accessory pipes 2 are connected (fused) to each other. The attachment pipe 2 and the vibration detector 3 may be arranged at the same time when the buried pipe 1 is installed, or the space above the buried pipe may be excavated and arranged. .

Each vibration detector 3 is connected to a relay station (sub station) 4 provided in each predetermined section L (for example, 100 m), and is passed through an adjacent relay station 4 in a remote station (satellite station) 50. It is connected to the information processing device 50.

FIG. 2 is an explanatory diagram showing the system configuration of the present invention. The vibration detectors 3 arranged in the auxiliary pipe 2 at intervals l are individually connected to the relay processing device 40 in the relay station 4 by the signal lines 6. The detection signal from each vibration detector 3 is sent to the relay processing device 40 and subjected to necessary signal processing. In one relay processing device 40 (for example, T ₁ ), a plurality of (20 in the illustrated example) vibration detectors 3 in the section L are included.
The detection signal from is input, and the detection signal is signal-processed and output to the cable 7. The relay processing device 40 (T _{2 to} T ₅₀ ) arranged in each section L has a LAN constructed by the cable 7, and the input of the vibration detector 3 connected to each relay processing device 40 and one front side. The output from the relay processing device 40 is superimposed and output to the cable 7. The cable 7 is preferably an optical fiber cable capable of transmitting a large amount of data at high speed. The outputs of all the relay processing devices (T _{1 to} T ₅₀ ) 40 in the predetermined area M are transmitted from the cable 7 via the hub 9 to the information processing device 50 in the remote base 5.
Be transmitted to.

In the information processing device 50, the output signal from the relay processing device 40 is subjected to necessary processing, and a communication line (a wireless or wired telephone line via the transmitting / receiving antenna 52) is provided.
To send the information to the central monitoring center 10. Further, necessary information is sent from the central monitoring center to the information processing device 50, and from there, the information is further transmitted to each relay processing device 40.

On the other hand, the remote base 5 is connected to the relay processing device 40.
It also serves as a power supply base for the vibration detector 3. That is, each remote base 5 is provided with a power supply device 51 connected to a commercial AC power supply, from which power is supplied to the relay processing device 40 and the vibration detector 3 via the power supply line 8.

[Function of each part] <Vibration detector> Predetermined interval l
The vibration detector 3 arranged in 1 detects the vibration generated around the buried pipe and sends it to the relay processing device 40. Since each of the vibration detectors 3 numbered and installed in the section L has position information, the local vibration data around the buried pipe is combined with the position information and the relay processing device 40.
Sent to. The direct purpose of the system is to detect the approach of various excavating machines that may damage the buried pipe, but the vibration detector 3 has the ability to detect traffic vibration and seismic vibration at the same time. Build a versatile system using the above. For that purpose, a detector that can select the measurement range and the sampling frequency of data according to the purpose is desirable. As an example, measurement range: ± 200
0 gal, resolution: 0.01% of full scale (0.2 gal)
A servo type accelerometer having a certain level of performance is used.

<Relay Processing Device> FIG. 3 shows the relay processing device 40.
FIG. 3 is an explanatory diagram regarding the function of. The relay processing device 40 is intended to perform a primary process on a detection signal sent in real time from a plurality of (20) vibration detectors 3 installed in a predetermined section L (100 m). Relay processing device 40
(T _n ) is provided with a memory space corresponding to the plurality of vibration detectors 3 and an arithmetic processing unit, and detects detection signals sent from the respective vibration detectors at predetermined sampling periods by the frequency of the power spectrum or the like. Convert to characteristic. Then, this frequency characteristic information is linked with the magnitude of the vibration directly obtained from the detection signal and the position information of each vibration detector, and further superimposed with the output from the immediately preceding relay processing device T _n-1. And output to the cable 7.

It is also possible to additionally connect a three-component accelerometer ST _n to the relay processing device 40 to detect the vibration around the relay station 4 more accurately. By measuring the primary information (acceleration, velocity, SI value, measured seismic intensity, pipe strain) at the time of the earthquake with this three-component accelerometer, the movement of the buried pipe at the time of the earthquake can be monitored.

<Information Processing Apparatus> FIG. 4 is an explanatory diagram concerning the function of the information processing apparatus. In the information processing device 50 in the remote base 5, the relay processing devices 40 (T ₁ to
Based on the frequency characteristic information sent from T ₅₀ ),
Information for determining whether another construction machine or the like that may cause damage to the buried pipe is approaching is output and sent to the central monitoring center 10. The central monitoring center 10 sends to the information processing device 50 a command required to output the above-mentioned information or a command to change the processing program. Relay processing device 40
When the primary information of the earthquake is input from, the secondary information (probability of breakage, estimation of leakage amount, etc.) for it is obtained and sent to the central monitoring center 10.

<Central Monitoring Center> Central Monitoring Center 10
The central processing unit collects information sent from the information processing unit 50, determines whether the buried pipe may be damaged, and gives a coping instruction based on the determination. From the central monitoring center, grasp the situation by displaying the location where damage is expected to occur on the installation map, issuing an alarm, and specifying the location, moving speed, and type of the excavator that causes the occurrence. Dispatch the damaged construction site to prevent damage to the buried pipe.

[Monitoring Judgment Method] A monitoring judgment method in the above-described buried pipe damage prevention monitoring system will be described below. FIG. 5 is a situation explanatory view for explaining the determination method of the embodiment according to the present invention, in which the steel pipe machine 20 (baby molding) is installed in the starting shaft A, and the steel pipe machine 20 is machined toward the buried pipe 1. It shows the situation where the advancing tube 21 is advancing.

When the tip of the cutting pipe 21 of the steel pipe cutting machine 20 approaches the embedded pipe 1, the vibration detector 3 in the auxiliary pipe 2 detects the vibration and sends a detection signal to the relay processing device 40. The relay processing device 40 converts this detection signal into a frequency characteristic, which is one of the characteristics of the power spectrum (PS
D) shows an output form as shown in FIG.

In FIG. 6, P ₀ indicates fine movements when the steel pipe machine 20 is not present.
2 and P3 show outputs when the distance x between the tip of the thrust tube 21 and the vibration detector 3 is 10.5 m, 5.5 m, and 2.5 m, respectively. As is clear from the figure, the output form of the power spectrum in this situation is almost flat without a large peak component at 20 Hz or higher (particularly 30 Hz or higher), and the tip of the retraction tube 21 approaches. The output level is increasing on average. Such an output form is a peculiar form seen when a steel pipe machine or a similar excavating machine approaches, and the form varies depending on the type of the vibration source. For example, when an excavator with a vibration source at the tip approaches, such as a propulsion ultimate propulsion machine, the power spectrum shows a peak component at the frequency peculiar to the vibration source, and the peak component rises with the approach. To do. By grasping the output form of such a power spectrum in advance according to various situations and monitoring the change, it is possible to identify the cause of vibration and determine the possibility of damage.

Focusing on the detection output from one vibration detector 3, a method of judging the possibility of damage by the detection signal will be described. Relay processing device 40 sampled at a specific cycle
The detection signal sent to the device is converted into frequency characteristic information at each sampling period and sent to the information processing device 50. In the information processing device 50, a predetermined parameter, for example, a power spectrum is selected from the frequency characteristic according to a command from the central monitoring center 10, statistical processing is performed on the data to obtain a required characteristic value, and this characteristic value is relayed. Device 4
Central monitoring center 10 with frequency characteristic information converted by 0
Send to. At the central monitoring center 10, changes in the obtained frequency characteristic information and characteristic values are monitored at any time, and the characteristics of the output form are analyzed. While the parameter change command and the processing program change command are issued to the information processing device 50 at any time, the above analysis is repeated, and when the cause of vibration is specified by the output form, the characteristic according to the output form is selected. And judge the possibility of damage.

The determination of the possibility of breakage due to the approach of the steel pipe machine described above will be described as an example. If the output form shown in FIG.
An average value is obtained for a vibration level of 0 Hz or higher, and an increase in the average value is monitored. At that time, focusing on the temporal change of the average value, particularly the rising speed, it becomes possible to grasp the speed at which the working tube of the steel tube machine approaches. Then, a predetermined reference value is set for the average value, and when the average value exceeds the reference value, it is determined that the shaft advancement has entered the dangerous area.

Information processing for such determination is usually performed in parallel with the detection signals from the plurality of vibration detectors. Then, the vibration detector at the specific position is selected based on the mutual relationship. The position at which the possibility of damage is detected can be accurately detected depending on which of the relay processing devices 40 is connected to the identified vibration detector and which number.

[Embodiment Concerning Arrangement of Vibration Detector] FIG. 7 is an external view of the vibration detector 3 used in the embodiment of the present invention. The vibration detector 3 has a detector main body 30 mounted on two ring-shaped support members 31. Detector body 30
From the above, the above-mentioned signal line 6 connected to the relay processing device 40 is derived. Mounting holes 31a are formed at three positions in one support member 31, and a conical fixing tool 32 is attached to the mounting holes by inserting the top portion thereof. In addition, an opening 31b for inserting a screw fastener (hexagonal range, etc.) is formed in the support member 31 on the front side when the vibration detector 3 is arranged in the accessory pipe 2.

In order to deploy such a vibration detector 3 in the accessory tube 2, as shown by the broken line in FIG. 8, the screw portion 32a of the fixture 32 is loosened and the fixture 32 is tilted to the support member 31. It is held in the state of being held, and is inserted into the accessory pipe 2 in that state. Since the outer diameter of the support member 31 is formed to be slightly smaller than the inner diameter of the accessory tube 2, it can be easily inserted into the accessory tube 2 by inclining the fixture 32. After placing the vibration detector 3 at a predetermined position in the pipe, the fixture 32
The screw part 32a is tightened to bring the fixture 32 into a standing state as shown by the solid line in FIG. As a result, the conical inclined surface of the fixing tool 32 comes into contact with the edge of the mounting hole 31a to fix the fixing tool 32 to the support member 31, and the notch 32b formed in the conical bottom portion of the fixing tool 32 has the inner surface of the accessory pipe 2. Therefore, the vibration detector 3 is fixed in the accessory pipe 2. When connecting the accessory pipe 2, the support member 3
The space in 1 is a space through which the plurality of signal lines 6 pass.

[Embodiment of Relay Station] FIG. 9 is an explanatory view showing a laid state of the above-mentioned relay station 4. The relay station 4 is an underground facility in which a housing 41 in which the relay processing device 40 is housed is buried under the ground. The housing 41 is a concrete enclosure that is waterproofed, and the lid 41 is provided on the ground surface.
It has a structure that allows internal maintenance and inspection by opening a.

With respect to the casing 41, the accessory pipe 2 in which the above-mentioned vibration detector 3 is arranged is provided with a joint portion 42 for drawing out the signal line 6, and is connected to this joint portion 42. Through the drawn out pipe 43A, the section L
The signal lines 6 from the respective vibration detectors 3 inside are bundled and
1 is installed in the relay processing device 40 inside the housing 41.
It is connected to the. Further, a similar joint portion 42 'is also provided in the accessory pipe 2'in which the cable 7 and the power supply line 8 are housed, and the cable 7 and the cable 7 are connected via the pull-out pipe 43B connected to the joint portion 42'. The power supply line 8 is introduced into the housing 41 and connected to the relay processing device 40. In this example, the accessory pipe 2'is provided separately, but the cable 7 and the power supply line 8 may be housed in the accessory pipe 2 to form one accessory pipe.

By thus forming the relay station 4 as an underground structure, the signal line 6, the cable 7 and the power supply line 8 can be deployed without being exposed to the ground, and the possibility of disconnection is avoided. be able to. Further, as described above, the three-component accelerometer 44 for earthquake detection may be embedded in the vicinity of the relay station 4 and connected to the relay processing device 40 via the extraction pipe 43C.

[Embodiment of Remote Base] FIG. 10 is an explanatory view showing the installed state of the remote base 5 described above. Remote base 5
The above-mentioned information processing means 50 and power supply device 51 are installed in a building installed on the ground. A utility pole 52 for drawing in a commercial power source and a telephone line is installed outside the building. The power supply line 51 is connected to the information processing device 50 via a power supply device 51, and an antenna 53 for transmitting and receiving information and a telephone line are connected.

In the basement of the remote base 5, a joint portion 54 is provided in the accessory pipe 2 ′, and the cable 7 and the power supply line 8 are introduced into the house through a lead pipe 55 connected to the joint portion 54. ing. When the cable 7 and the power supply line 8 are housed in the accessory pipe 2 and the accessory pipe is one, the cable 7 and the power supply line 8 are provided by providing a joint portion in the accessory pipe 2.
Pull out.

[0053]

Since the present invention is constructed as described above,
It is a monitoring system that prevents damage to buried pipes, and enables monitoring over a wide area.
It is easy to lay, does not need to be re-equipped, and it is possible to smoothly deal with damage prevention after detecting the possibility of damage. In addition, since it enables automatic monitoring over a wide area, it is possible to reduce labor and labor costs by eliminating the need for manual monitoring.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a monitoring system of the present invention.

FIG. 2 is an explanatory diagram showing a system configuration of the present invention.

FIG. 3 is an explanatory diagram related to a function of a relay processing device.

FIG. 4 is an explanatory diagram regarding functions of the information processing apparatus.

FIG. 5 is a situation explanatory diagram for explaining a determination method according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an output form of a power spectrum according to an example.

FIG. 7 is an external view of a vibration detector used in the embodiment of the present invention.

FIG. 8 is an explanatory diagram illustrating fixation of a vibration detector.

FIG. 9 is an explanatory diagram showing a laid state of the relay station according to the embodiment.

FIG. 10 is an explanatory diagram showing an installed state of a remote base according to the embodiment.

[Explanation of symbols]

1 buried pipe 2,2 'accessory pipe 3 Vibration detector 30 Detector body 31 Support member 32 fixture 4 relay station 40 Relay processing device 41 housing 41a lid 42 Joint part 43A, 43B, 43C Drawer tube 44 3-component accelerometer 5 remote base 50 Information processing equipment 51 power supply 52 utility pole 53 antenna 54 Joint 55 Drawer tube 6 signal lines 7 cable 8 power lines 20 Steel Pipe Machine 21 Cutting tube

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukio Miyamoto Exhibition             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Keiji Shiba             Seavan, 1-3-2 Shibaura, Minato-ku, Tokyo             S S building Shimizu Corporation (72) Inventor Hiroyuki Watanabe             Seavan, 1-3-2 Shibaura, Minato-ku, Tokyo             S S building Shimizu Corporation (72) Inventor Keiichi Okada             Seavan, 1-3-2 Shibaura, Minato-ku, Tokyo             S S building Shimizu Corporation F term (reference) 2G064 AA04 AB22 BA02 CC42 CC46                       CC54 CC62                 3J071 AA02 AA12 BB11 CC11 DD30                       EE07 EE08 EE21 EE30 EE37                       FF03 FF12                 5C087 AA03 AA09 AA10 AA24 AA25                       BB20 BB34 BB63 BB74 DD03                       DD49 EE05 EE19 FF01 FF03                       FF04 FF17 FF19 FF20 GG11                       GG14 GG31

Claims (8)

[Claims] 1. An auxiliary pipe is arranged in proximity to an underground pipe, and vibration detectors for detecting vibrations around the embedded pipe are arranged at predetermined intervals in the auxiliary pipe, and the vibration detector detects the vibration. A signal is a damage prevention monitoring system for a buried pipe that detects the possibility of damage to the buried pipe, wherein damage to the buried pipe is detected based on a change in frequency characteristics of vibration detected by the vibration detector. A damage prevention and monitoring system for a buried pipe, characterized by comprising information processing means for judging the possibility. 2. The information processing unit according to claim 1, wherein the power spectrum of the detected vibration determines that there is a high possibility of damage when the vibration level of a specific frequency or higher exceeds a reference level. Monitoring system for damage prevention of buried pipes. 3. The information processing means determines the possibility of damage based on a temporal change in a vibration level of a specific frequency or higher in the detected power spectrum of the vibration. Damage prevention monitoring system for buried pipes. 4. The vibration detector comprises a ring-shaped support member fixed to the inner surface of the accessory pipe, wherein a mounting hole is formed in the support member so as to penetrate in the axial direction of the accessory pipe. By inserting the top of the conical fixture into the hole and screwing it, the bottom of the fixture is brought into contact with the inner surface of the accessory pipe,
2. The embedded pipe damage prevention monitoring system according to claim 1, wherein the support member is fixed to the accessory pipe. 5. The damage prevention monitoring system according to claim 1, wherein the vibration detector provided in a predetermined section is provided in each section of a relay processing apparatus in a relay station. Connected to
The relay processing device is provided with information transmitting means for transmitting information to the information processing means via each relay processing device, wherein the relay processing device performs a primary process on a detection signal from each vibration detector, and the primary processed information is used for each vibration. A damage prevention monitoring system for a buried pipe, which transmits the information to the adjacent relay processing device together with the detector installation position information. 6. Information transmitted via the relay station provided in a predetermined area is transmitted to an information processing apparatus in a remote base provided in each area, and the information processing apparatus sends the information to a monitoring center. 6. The damage prevention and monitoring system for a buried pipe according to claim 5, wherein the monitoring center gives the judgment of the possibility and a coping instruction based on the judgment. 7. The buried pipe damage according to claim 5, wherein the relay base is constructed by burying a waterproof-treated casing under the ground, and arranging the relay processing device in the casing. Prevention monitoring system. 8. The remote base is provided with the information processing means in a building installed on the ground, and is provided with at least a power receiving facility for a commercial power source and a transmitting antenna facility. The buried pipe damage prevention monitoring system according to 6.