JP2000121740A - Method for monitoring underground buried pipeline facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an underground buried pipeline facility damage accident or the like by identifying and detecting the vibration or the sound of an execution machine caused by construction from the vibration or the sound of a non- execution machine caused by the passage of a vehicle or the like by a vibration sensor or a sound pressure sensor. SOLUTION: A center centralized monitoring function part 11 receives a signal from sensors 14 and 15, analyzes the signal, detects the vibration or the sound of an execution machine due to a road construction or the like that is an abnormal signal, and shows an image along with the arrangement figure and the map of a pipeline together with the position information of the sensors 14 and 15. A transmitter function part 12 transmits a reception signal from the sensors 14 and 15 to the center centralized monitoring function part 11 in real time. The sensor function part is composed of at least one sound pressure sensor 14 and vibration sensor 15, the sound pressure sensors 14 detect the sound of the execution machine and the vibration sensors 15 detect pressure that is applied to an underground buried pipeline facility when an execution machine such as a back hoe approaches a road.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for monitoring a trauma caused by a road construction of an underground pipe installation.

[0002]

2. Description of the Related Art Underground buried pipeline facilities are buried underground near roads, and are damaged by construction machinery during road works such as gas, water, and sewerage, resulting in accidents such as cable cutting and gas leakage. The case never stops. If the underground burial company is aware of the implementation of the construction in advance, it is possible to prevent damage to the underground burial pipe by meeting in advance with the contractor and attending during the construction. However, there are many constructions that do not have prior notice, and it is actually difficult to completely understand such construction even by patrols.

Conventionally, as a method of searching for damage to underground pipe installations, a method of specifying the position of an injury using an X-ray projection photograph or an ultrasonic inspection method has been used. Alternatively, as in a power cable injury prediction method described in Japanese Patent Application Laid-Open No. 5-180690, a power cable and an optical fiber are provided side by side, and the vibration caused by construction is detected by detecting a mode change of a laser beam input to the optical fiber. There is a method of indirectly predicting a power cable trauma.

[0004]

Since road construction usually involves considerable vibration or sound, if this can be detected, accidents such as cable cuts and gas leaks drawn into underground pipes can be considerably reduced. Underground buried pipelines are laid over a long distance, but most of the underground buried pipelines are susceptible to damage directly under the road and in the vicinity thereof. A vibration sensor and sound pressure sensor are installed, and the signals detected by each sensor are transmitted to the monitoring center via a transmitter, and if the construction of construction machinery is detected, it is anticipated that the impact of the construction on underground pipeline facilities will be affected. It becomes possible to foresee.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and monitors the construction of a construction machine near an underground pipeline facility near a road, that is, a location where damage is likely to occur over the entire length of the underground pipeline facility. It is another object of the present invention to provide a method of monitoring underground buried pipeline facilities to reduce damage to underground buried pipeline facilities.

[0006]

In order to achieve the above object, an underground pipe installation monitoring method according to the present invention uses a vibration sensor or a sound pressure sensor installed in an underground pipe installation or a manhole. The vibration or the sound of the construction machine caused by the vehicle is distinguished and detected from the vibration or the sound of the non-construction machine caused by the traffic of the vehicle, and the damage of the underground pipeline equipment is predicted. The signal detected and detected is converted into an electric signal, transmitted to a monitoring center, and centrally managed.

[0007] According to the present invention, since the construction near the underground pipe installation can be centrally monitored, even if the construction without notification is carried out in advance, the maintenance person can detect the presence or absence of the construction. Therefore, it is possible to prevent damage to the underground pipe installation.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 and FIG. 2 are explanatory diagrams showing the configuration of an equipment monitoring system for underground buried pipeline equipment according to the present invention. As shown in FIG. 1, the system of the present invention is a
1, a transmitter function unit 12, a signal transmission function unit 13 between the center central monitoring function unit 11 and the transmitter function unit 12.
And a sensor function unit including the sound pressure sensor 14 and the vibration sensor 15. The centralized monitoring function unit 1
1 receives signals from the sensors 14 and 15 and analyzes the signals to detect vibration or sound of construction machinery associated with road construction or the like, which is an abnormal signal, and together with position information of the sensors 14 and 15 It has the function of displaying images together with the pipeline layout map and map. The transmitter function unit 12 includes a sensor 14,
The received signal from the center 15 is transmitted to the center centralized monitoring function unit 11 in real time by wireless or wired. The sensor function unit includes one or more sound pressure sensors 14 and a vibration sensor 15. The sound pressure sensor 14 detects the sound of the construction machine. The vibration sensor 15 is used when a construction machine such as a backhoe approaches a road. Detects the pressure exerted on underground pipeline equipment. As the sound pressure sensor 14, a ceramic type sensor is used. In addition to indirectly detecting the sound of the construction machine such as a backhoe to judge the approaching state of the construction machine, the vibration sensor 15 is a piezoelectric acceleration type. A double detection configuration may be used so as to directly detect the acceleration of vibration when a construction machine such as a backhoe contacts the underground pipeline equipment.

Further, as shown in FIG.
Has a frequency converter and an SFT analyzer function, and performs centralized monitoring after frequency analysis of the sound of construction machines such as backhoes propagating in underground pipeline facilities and the sound of non-construction machines caused by vehicle traffic etc. You may comprise so that it may transmit to the function part 11. 2, the same parts as those of FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

In the present invention, whether the vibration detected by the vibration sensor 15 in the underground pipe installation is caused by the passage of the vehicle or the vibration of the construction machine is determined as follows.

[0012] In a buried underground pipe line facility laid immediately below or near a road, a unique wave of displacement called a surfing phenomenon accompanying the traveling of the vehicle is generated due to vibration caused by the running of the vehicle. Since the measurement of the surfing phenomenon is a measurement in the underground pipe installation, it is detected by the vibration sensor 15. The vibration sensor 15 includes three accelerometers that measure accelerations in three directions of x-axis, y-axis, and z-axis of three-dimensional coordinates, respectively, when an axis direction of the underground pipe is an x-axis direction. The determination can be made by setting the road equipment in a predetermined direction.

If the vibrations detected by the vibration sensor 15 are caused by the surfing phenomenon, it is determined that there is no abnormality. If the other vibrations are determined to be abnormal vibrations caused by the construction machine, the damage to the underground pipeline equipment is determined. Can be predicted. In addition,
Vibrations caused by construction machines such as backhoes usually increase gradually from the ground surface to the underground pipe facilities, and the frequency components of the vibrations also tend to shift to higher frequencies. Can be tracked and displayed for each abnormal vibration.

[0014]

As described above, the present invention is to monitor the presence or absence of road construction or the like in the vicinity of the entire length of the underground pipe installation and to reduce accidents and injuries of the underground pipe installation. The vibration sensor or sound pressure sensor installed in the underground pipe system or in the manhole detects the vibration or sound of the construction machine accompanying the abnormal road construction near the underground pipe system, By transmitting the detection signal to the monitoring center, it is possible to predict a trauma of the underground pipe installation such as the communication pipe installation.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing another embodiment of the present invention.

[Explanation of symbols]

 11 centralized monitoring function unit 12 transmitter function unit 13 signal transmission function unit 14 sound pressure sensor 15 vibration sensor

Claims (2)

[Claims] 1. A method for monitoring underground pipe installation which prevents damage caused by construction of underground pipe installation, wherein at least one vibration sensor is installed in the underground pipe installation near a road, and the vibration sensor is detected. The generated signal is transmitted to the monitoring center by an electric signal, and at the monitoring center, the vibration of the construction machine caused by road construction and the like and the vibration of the non-construction machine caused by vehicle traffic etc. are separated, and the point of occurrence of the vibration of the construction machine is determined. Analyze,
A method for monitoring underground buried pipeline equipment, wherein the method predicts a trauma to the underground buried pipeline equipment. 2. A sound pressure sensor installed in a manhole discriminates and detects the sound of a construction machine caused by road construction or the like from the sound of a non-construction machine caused by vehicle traffic or the like, and causes damage to an underground pipe installation. A method for monitoring underground buried pipeline facilities, wherein