KR101424983B1 - A Magnetic Applied Management System - Google Patents

Abstract

The present invention relates to a facility management system for a cylindrical pipe line buried underground,
A plurality of magnetic vector sensors capable of sensing the direction of the earth magnetic field are arranged on parallel lines to cancel out the magnetic field of the earth and to detect only the pure distortion magnetic field and the direction and the size of the distorted magnetic field detected by the sensor means, And a magnetic marker part formed of a magnetic body and attached to the cylindrical pipe, wherein the magnetic marker part comprises an upper end part and a lower end part, and the lower end part of the magnetic marker part has a center position of the magnetic body And the magnetic polarity is displayed on the upper end of the magnetic marker portion.

Description

Description of the Related Art A Magnetic Applied Management System (MMI)

The present invention relates to a magnetic marker type underground facility management system for attaching a magnetic marker to a subterranean burial material, detecting the magnetic marker, performing a positional amount of the magnetic marker, constructing a database, and linking with a GIS for efficient management.

In recent years, installation of city gas supply pipes, water supply and sewage pipes, electricity and communication lines has been rapidly increasing in accordance with progress of urbanization. These facilities are generally grounded for cosmetic reasons, in order to protect the facilities from the ground environment. However, since the location and depth information of such underground facilities are not accumulated properly, it is not easy to visually understand its position or condition.

In addition, it is difficult to accurately locate existing underground facilities when new underground facilities are installed. This increases the time and cost, damages existing underground facilities, and creates safety problems for workers.

The present invention relates to Registration No. 10-0732127 (Jun. 27, 2007). The above-mentioned patent is a system for managing a facility of a cylindrical pipe line buried underground, and more specifically,

At least two magnetic vector sensors capable of sensing the direction of the earth magnetic field are arranged on a parallel line so as to cancel the earth magnetic field and to detect only the purely distorted magnetic field and to detect the direction and size of the distorted magnetic field detected by the sensor means And a magnetic marker unit formed of a magnetic body and attached to the cylindrical channel, wherein the magnetic marker unit is composed of an upper end portion and a lower end portion, and the lower end portion is composed of an upper end portion and a lower end portion, Characterized in that the center of the magnetic body is formed in a curved surface structure so as to be orthogonal to the ground surface, and magnetic polarity is displayed on the upper end of the magnetic marker portion,

The underground excavation safety caused by the discrepancy between design and construction by measuring the pattern or change amount of the earth magnetic field change caused by the direction of the magnetic line of force generated in the permanent magnet and detecting the planar burial position of the underground facility with the magnetic marker part without error We provide an underground facility management system that can prevent accidents in advance,

The present invention provides an underground facility management system capable of easily attaching a magnetic marker portion made of a permanent magnet to an underground object and measuring a magnetic field with a constant direction of magnetic force lines,

It is possible to detect the magnetic field generated by the magnetic marker portion and convert the magnitude to digital data to facilitate the processing of numbers and graphics to output detection results in various visual forms, Management system.

In the present invention, when a magnetic detector is used as in the above-mentioned patent, generally, a magnetic substance is attached around a subterranean material in order to amplify a change in the magnetic field of the earth, but it is difficult to distinguish between a general metal body and a magnetic body, The general detector of the present invention displays the detection value instantaneously, so that it is difficult for the detector to recognize the pattern of change of the detection value, the location of the magnetic coil is inaccurate due to the installation of the magnetic coil at the time of excavation and burial construction, In particular,

In order to amplify the change of the magnetic field of the earth, a more useful method for contacting and attaching the magnetic body to be attached to the cylindrical pipe is proposed.

The present invention relates to a facility management system for a cylindrical pipe line buried underground,

A plurality of magnetic vector sensors capable of sensing the direction of the earth magnetic field are arranged on parallel lines to cancel out the magnetic field of the earth and to detect only the pure distortion magnetic field and the direction and the size of the distorted magnetic field detected by the sensor means, And a magnetic marker part formed of a magnetic body and attached to the cylindrical pipe, wherein the magnetic marker part comprises an upper end part and a lower end part, and the lower end part of the magnetic marker part has a center position of the magnetic body And the magnetic polarity is displayed on the upper end of the magnetic marker portion. The magnetic polarity displayed on the polarity display section preferably selects the N pole.

The magnetic marker portion is provided with a covering material surface-treated for waterproofing and moisture-proofing over the entire surface of the magnetic body, and a polarity indicating portion indicating the polarity of the magnetism is provided at an upper end portion of the magnetic marker portion.

Wherein the control means comprises: a digital gradiometer for receiving as output the outputs of the two magnetic vector sensors of the sensor means, generating a frequency corresponding to the frequency difference between the two signals and outputting the frequency as digital data, A voltage-controlled oscillator for outputting the analog signal generated from the digital-analog converter to a frequency band in which auditory sense can be sensed, a voice amplifier for amplifying the output of the voltage- An interface unit for inputting the output of the digital graphic meter to a microprocessor, a microprocessor for processing a signal output from the interface unit, an LCD device for outputting data output from the microprocessor in numerical or graphic form, a GPS Through the current Receiving value includes the external system connection for connecting the GIS information that is input from the GPS receiver and out of the GIS system for input to the microprocessor by wire or wirelessly.

The microprocessor compares and searches the location information received from the GPS receiver with the embedded information of the measurement area from the external GIS system and outputs buried information corresponding to the received location to the LCD device.

Wherein the control means sets the detection value detected on the indicator according to the scanning method to a predetermined pattern so as to divide the magnetic field disturbance object around the general metal object or the facilities buried in the ground, .

The microprocessor stores the detected values for one period scan at a high resolution and continuously outputs the detected values through the LCD device.

According to the present invention, when a magnetic detector is used, it is generally used to attach a magnetic body around a subterranean material in order to amplify a change in the magnetic field of the earth, but it is difficult to distinguish between a general metal body and a magnetic body because there is no directionality. Since the numerical values are displayed in a momentary manner, it is possible to solve the problem that the detector does not recognize the change pattern of the detection value,

 By precisely installing the magnetic coil, it is possible to easily grasp the position at the time of excavation and burial construction, reduce the loss of the magnetic coil, and accurately and easily attach the magnetic body to the cylindrical pipe to effectively and accurately locate the underground facility .

1A is a plan view of a magnetic marker portion of the present invention; Front view; Side view; Installation view seen from side B; Other installation drawings seen from the C side;
2A is a side view showing another embodiment of the magnetic marker portion of the present invention; B installation method; C An illustration of another installation method;
Figure 3 shows an example of the distribution and detection method of magnetic force lines of magnetic markers installed in an underground facility
4 Block diagram of underground facility detection system
5 shows an example of an output characteristic curve of the magnetic sensor
6 graph showing the pattern of detection value change
Figures 7A and B are partial illustrations of another embodiment of the present invention.

Hereinafter, the configuration of the present invention will be described with reference to the drawings.

FIG. 3 shows a magnetic force line distribution and detection method of a magnetic marker installed in an underground facility. The magnetic marker 11 has a permanent lifetime. The permanent magnet (ferrite) of a certain magnetic force is coated with nickel plating, Urethane film coating process, and the like is attached to the facility at the time of installing the underground facility 18 such as the water supply and drainage pipe, city gas supply pipe, electricity and communication line.

The underground facility detector 10 includes a support bar 15 and a first flux gate sensor 12 and a second flux gate sensor 13 provided in the support bar 15 to detect the magnetic flux of the magnetic marker 11 And the first fluxgate sensor 12 and the second fluxgate sensor 13 are vector sensors and measure an average magnetic field component corresponding to each sensing axis.

The first fluxgate sensor 12 and the second fluxgate sensor 13 are located in different directions so that the polarities of the measured magnetic fields are opposite to each other and the fluxgate sensor 12 and the second fluxgate sensor 13 ), It is possible to eliminate the components commonly sensed by the two sensors, such as the geomagnetic field, so that only the magnetic field component of the liquid level remains.

The magnetic field measured by the first fluxgate sensor 12 close to the magnetic marker 11 has a value much larger than the value specified by the second fluxgate sensor 13. [ Accordingly, the difference between the magnetic field intensity of the magnetic marker 11 and the magnetic field intensity of the magnetic marker 11 having the magnetic component indicates the strength of the magnetic field measured through the speaker or LCD device built in the underground facility detector 10 Output.

FIG. 4 is a block diagram of an underground facility detection system according to the present invention. The first fluxgate sensor 12 and the second fluxgate sensor 13 are installed on a support rod 15 such that the axis thereof is straight. The first fluxgate sensor 12 and the second fluxgate sensor 13 measure magnetic fields generated at the magnetic markers 11 at their respective positions and input the measured magnetic fields to the digital gradiometer 20. [ The digital gradiometer 20 performs digital mixing of the magnetic field waveforms input from the first fluxgate sensor 12 and the second fluxgate sensor 13. [ That is, a frequency signal corresponding to the frequency difference between the two input signals is generated, and the magnitude of the mixed frequency of the two waveforms is output as digital data. The digital data output from the digital gradiometer 20 is transmitted to the microprocessor 22 through the input interface 21 for outputting in numerical or graphical form. The microprocessor 22 is provided with a storage means for receiving a digital signal corresponding to the intensity of the magnetic field and calculating the intensity of the magnetic field generated by the magnetic marker 11, Is displayed on the LCD display device 24 in the form of letters, numbers, or graphs. The microprocessor 22 is connected to the GPS receiver 32 and the external system connector 33. The GPS receiver 32 can receive the current location of the underground facility detector 10 via GPS. The received location information is processed by the microprocessor 22 and stored in the storage means of the microprocessor 22.

The external system connection unit 33 is connected to the external GIS system wirelessly or by wire to inquire buried information of the area to be measured. The microprocessor 22 refers to the digital data output from the digital graphic meter 20 and if it confirms that the magnetic marker 11 is buried, it receives the current position information from the GPS receiver, 33) and receives the buried information corresponding to the current location from the external GIS system. Then, the microprocessor 22 compares the buried information with the location, searches for buried information on the buried underground, and outputs the embedded information to the LCD device 24 through the output interface 23 in the form of a graphic. The digital data output from the digital gradiometer 20 is sent to the input of the digital-to-analog converter 25 for outputting with an external voice of a strength corresponding to its size. The digital-to-analog converter 25 outputs the input digital data as an analog voice signal in the range of 0 to 2.5 V according to the size thereof. The sensitivity adjuster 26 adjusts the sensitivity of the signal by adjusting the threshold voltage of the digital-to-analog converter 25.

A +5 V power is supplied to the first fluxgate sensor 12, the second fluxgate sensor 13 and the digital gradiometer 20 by a single constant voltage source, and the digital-analog converter 25 and the voltage- (27) and the voice amplifier (28) are driven by another constant voltage source.

The output frequency of the first fluxgate sensor 12 and the second fluxgate sensor 13 may be adjusted by Mixing to obtain the difference between the measured magnetic fields to generate a signal indicating the presence or absence of the magnetic marker 11. [ )do. This mixing is performed in the digital gradiometer 20. The output from the digital gradiometer 20 has a parallel data structure that varies with the magnitude of the mixed frequency. It also has an output indicating the sign bit. This indicates which of the first fluxgate sensor 12 and the second fluxgate sensor 13 has a large magnetic field. Thus, the output "0" means that the two sensors detect a magnetic field of the same size, and the output of the highest value (eg, 255) means that the magnetic field difference is large. The digital gradiometer 20 observes the maximum and minimum values of the field length, depending on the crystal oscillator frequency, but automatically calibrating for 10 to 20 seconds from when the switch is turned on. At this time, the digital gradiometer (20) is arranged in the north-south direction, and the end portion is tilted by the inclination angle of the geomagnetic field system. Then, by turning on the switch and rotating the digital gradiometer (20) 180 ° for the adjustment time (about 10 seconds), the sensitivity and zero offset for the sensor are determined and the error from the sensor difference is corrected.

The most difficult part of maximizing the performance of the underground facility detector 10 is to mechanically arrange the first fluxgate sensor 12 and the second fluxgate sensor 13. The fixation of the first fluxgate sensor 12 and the second fluxgate sensor 13 is such that the first fluxgate sensor 12 is aligned with the axis of the second fluxgate sensor 13 exactly. In the present invention, first, the first fluxgate sensor 12 is fixed and the second fluxgate sensor 13 is fixed with a fixing screw having a non-magnetic property. In this way, while the sensor device is being measured, the axis of the first fluxgate sensor 12 and the second fluxgate sensor 13 are aligned while rotating the fixing screw so as to keep certain measured values while continuing to rotate.

In the present invention, in order to allow the detector to easily recognize the detection value change pattern, the detection value of the detector 10 during one cycle scan of the microprocessor 22 of the microprocessor 22 incorporated in the detector 10 is set to a high resolution And outputs it through the LCD device 24 of the detector 10 continuously to distinguish the distinction between the magnetic marker unit 100 and the magnetic field disturbance object in the form of a graph, thereby facilitating the determination.

Regarding the characteristics of the underground facility management system using the polarity of the magnetic markers, FIG. 5 shows the output characteristic curve of the magnetic sensor, and the range of the earth magnetic field is -0.5G to + 0.5G. +/- indicates the direction of the Earth's magnetic field. On the other hand, FIG. 6 is a graph showing a detection value change pattern. However, it can be seen that the distribution of the magnetic flux density becomes regular around the vertical point of the center of the magnetic marker portion 100 when the computer analysis is performed.

The first fluxgate sensor 12 and the second fluxgate sensor 13 use a vector sensor having a directionality as a fluxgate type magnetic sensor and the direction of the earth magnetic field is different between the first fluxgate sensor 12 and the second fluxgate sensor 12. [ Has a maximum value when it coincides with the vertical axis of the flux gate sensor 13, and has a minimum value when it coincides with the horizontal axis. Therefore, the difference in the vector amounts of the first fluxgate sensor 12 and the second fluxgate sensor 13 is the magnitude of the Earth magnetic field change, and the direction of the vector amount indicates the polarity position of the magnetic marker portion 100. [

According to the present invention, the magnetic markers attached to the facilities are arranged such that the portion indicated by the N-pole is positioned above the magnetic markers so that the state of attachment of the magnetic bodies during the operation is kept constant, The detection error can be minimized by easily separating the magnetic metal disturbance object around the general metal object or the buried object and the magnetic marker portion attached to the facility which are magnetized by the change pattern of the detection value .

In addition, according to the degree of change of the magnetic field of the earth being proportional to the magnitude of the magnetic flux density generated by the magnetic body attached to the buried material, a structure easy to adhere to the cylindrical channel is selected so that the position of the center of the magnetic body is orthogonal to the earth surface, A polarity indicator is formed on the top of the magnetic marker so as to make the attachment state of the magnetic body constant, so that the operator can easily attach the polarity to the position.

In the above, further details will be cited in the above-mentioned Japanese Patent No. 10-0732127.

Based on the above description, in particular, in the magnetic marker portion of the present invention,

A plan view of the magnetic marker portion 100 shown in FIG. 1A; Front view; Looking specifically at the side view,

A magnetic body (101) of a permanent magnet member in which an upper portion is disposed at an N pole lower portion and an S pole at an upper portion; An upper part 103 covered with a plastic (or acrylic resin) after the nickel plating (or urethane film coding) processing for waterproofing and moisture proofing of the magnetic material 101 and a lower part of a city gas supply pipe (or a water supply and drainage pipe, A covering material 102 comprising a lower end 104 for attachment to the facility 18; A polarity display part 105 provided on an upper surface 100a of the upper part 103; And a hinge part (106) hinged to the lower end part (104) so that the upper end part (103) can be tilted.

On the other hand, the bottom surface 100b of the lower end portion 104 may have a curved surface shape to increase the attachment surface of the cylindrical pipe and facilitate the orthogonal alignment with the ground surface.

The upper end portion 103 and the lower end portion 104 of the covering material are coupled through the hinge portion 106. [ At this time, it is preferable to secure a spaced distance between the upper end portion 103 and the lower end portion 104 so as to be relatively inclined. The hinge portion 106 adopts a material such as a metal material, a synthetic resin material, or the like which is somewhat refractable and firmly fixes the upper end portion 103 and the lower end portion 104 of the covering material. Particularly, the hinge part 106 is formed on the side wall surface of the cover 102 so as not to damage the body of the magnetic marker part 100, and the hinge part 106 is formed on the side wall surface of the upper end part 103 and the lower end part 104 Respectively.

Referring to FIGS. 1B and 5C and the actual installation work,

First, the bottom surface 100b of the lower end portion 104 is attached to the pipeline of the underground facility 18. At this time, the attachment follows the conventional working method.

Thereafter, the horizontal angle of the upper surface 100a of the upper end portion is adjusted so as to be orthogonal to the ground surface. Such an operation can be performed because the hinge portion 106 can bend.

More specifically

The bottom surface 100b of the lower end portion 104 is adhered horizontally on the curved surface of the underground facility 18 made of a cylindrical pipe so that the left tilting (+ a) or the right tilting (-a) The upper surface 100a of the right tilt a can be determined by inducing the tilt of the hinge portion 106 while moving the tilted upper surface 100a` of the upper portion 103 using a horizontal system .

When the state of the right tilt (a) is obtained, a filling member 107 such as cement, silicone, or synthetic resin is filled between the upper end 103 and the lower end 104 to maintain the above state.

On the other hand, as shown in FIG. 2A, the tilt adjusting screw portion 108 can be formed on the opposite side of the hinge portion 106. In the embodiment of Figures 2B and 2C, the tilting screw portion 108 comprises a manually adjustable handle 108a; An adjustment screw 108b extending vertically from the adjustment handle 108a and having a screw shape formed on the outer periphery thereof and being wound and unwound along the rotation; And a tubular upper and lower attaching portion 1008c having a screw shape corresponding to the adjusting screw 108b and fitted with the adjusting screw 108b and attached to the side wall of the covering member 102 .

1C and Fig. 1B can be maintained while the screw is unwound or wound in the direction sp in which the adjusting knob 108a is rotated as shown in Figs. 2B and 2C. At this time, the adjustment handle 108a can be adapted to a changed angle of the upper end portion and the lower end portion when the hinge portion is bent by the rotation axis, by adopting a member that allows slight bending.

In the case where the tilt adjusting screw portion 108 is provided, it is possible to shorten the time required by filling the filling member and omitting the hardening operation. Of course, it is also possible to work together for durability after installation.

On the other hand, when the bottom surface 100b and the channel are curved surfaces having different radii, the curvatures of the curved surfaces may be different from each other, and only one supporting point may be formed.

7A and 7B, at least two support points t3 are formed on the bottom surface 100b of the lower end portion 104 so as to be stably supported from the cylindrical outer periphery of the underground pipe 18 The bottom surface 100b may have a triangular shape. At this time, a triangle is formed so as to form a central angle t2 by giving an outer peripheral angle (t1) from both sides of the outer periphery of the bottom surface of the lower end portion (104). The center angle t2 is preferably about 110 to 170 degrees. After the fulcrum t3 is brought into contact with the fulcrum to form a fulcrum, the remaining voids can be filled with the filling member to be hardened.

An underground facility detector 10; A magnetic marker 11; A first fluxgate sensor 12 underground facility 18; A digital gradiometer 20; A microprocessor 22; A LCD display device 24; A digital-to-analog converter 25; A magnetic marker portion 100; The magnetic body 101,

Claims (1)

Sensor means in which a plurality of magnetic vector sensors capable of sensing the direction of the earth magnetic field so as to cancel the earth magnetic field and detect only the purely distorted magnetic field are arranged on a parallel line,
A control means for converting the direction and magnitude of the distorted magnetic field sensed by the sensor means into a sensed value and displaying the sensed numerical value on a graphical display, and a magnetic marker portion formed of a magnetic material and attached to the cylindrical conduit,
Wherein the magnetic marker portion comprises:
A magnetic body 101 of the permanent magnet member; A cover member 102 made of a covered upper end 103 for moisture proofing of the magnetic body and a lower end 104 for attaching to the underground facility 18; A hinge portion (106) hinged to the lower end portion so as to tilt the upper end portion; And a tilt adjusting screw part (108) for holding the state of the right tilt (a)
Wherein the tilting-
Adjustment knob 108a; An adjustable screw (108b) extending from the adjustment handle and formed in a threaded shape on the outer periphery and being capable of being wound and unwound; And an attachment portion (1008c) having a tubular shape in which a screw shape corresponding to the adjustment screw is formed, and the adjustment screw is fitted and the outside is attached to the side wall of the cover
Wherein the bottom surface of the lower end portion has a triangular shape having a center angle t2 to form the cylindrical pipe and two supporting points.

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