WO2012173293A1

WO2012173293A1 - Apparatus and method for inspection of section of magnetic conduit pipe using microprocessor

Info

Publication number: WO2012173293A1
Application number: PCT/KR2011/004402
Authority: WO
Inventors: 구종희
Original assignee: 부경엔지니어링 주식회사
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2012-12-20

Abstract

The present invention relates to an apparatus and a method for inspecting a section of a conduit pipe using a microprocessor. More specifically, the present invention provides: an apparatus, for inspecting a section of a conduit pipe, is the apparatus being provided with sound transmission and reception devices and configured for inspecting a pipe arranged between the transmission and reception devices; and a method for inspecting a section of a conduit pipe using a microprocessor. The apparatus comprises: a pipe to be inspected; a transmission converter for inducing vibration in the pipe (300); a pulse generator for providing the voltage which causes the vibration in the transmission converter; a remote switch for selectively connecting or disconnecting the pulse generator to or from the transmission converter; a remote control means for controlling the remote switch; and a microprocessor for operating the remote control means. In addition, the apparatus comprises: a reception converter, for picking up the vibration propagated through the pipe, and for converting same into electronic signals, is the reception convert being positioned on one end of the pipe, separated by a predetermined distance from the other end of the pipe on which the transmission converter is positioned,; a reception amplifier for amplifying the electronic signals from the reception converter; an A/D converter for converting analog signals from the reception amplifier into digital data; a microprocessor for processing and analyzing data received from the A/D converter; and a test output terminal for outputting whether abnormalities exist in the pipe, as obtained by the microprocessor, wherein the microprocessor (700), for the received waveforms, obtains the absolute values for the direct wave (740) portions and integrates same and calculates an average value; compares the average value to the first reference value for a normal state and determines whether a pipe crack (310) or a pipe erosion (320) exists in the path of the direct wave, and outputs the determination to the test output (800) terminal; and transmits the waveforms to a visualization module (900) over time. The visualization module (900), after acquiring the received waveforms by time, cuts the received waveforms by time into set units; corrects distortions in the cut and received waveforms; maps the corrected received waveforms onto a plan; displays the mapped and received waveforms onto a pre-stored plan of a pipe image by means of overlapping thereof; marks the status or the extent of damage indicating a pipe crack (310) or a pipe erosion (320); and magnifies and marks the location of the damage.

Description

【Specification】

[Name of invention]

Inspection device for pipeline pipe section using microprocessor and its method

Technical Field

The present invention relates to an inspection apparatus for a pipeline section using a microprocessor and a method thereof, by using a microprocessor for a pipeline pipe, and having an abnormality such as cracks, erosion and corrosion for a certain section of the pipeline pipe. The present invention relates to an inspection apparatus and method for inspecting pipeline pipe sections at once.

<2> In addition, the present invention can check the abnormality of a certain section of the pipeline pipe without mechanical transport means, and only the remote transmitter and the receiver converter for the embedded or unexposed pipeline pipe start of the predetermined section It relates to the inspection and device of pipeline section and the method for inspecting the abnormality such as crack, erosion and corrosion in a certain section by excavating at the part and end.

In addition, the present invention relates to an inspection apparatus and method for a pipeline pipe section that provides a more accurate inspection results by calculating and determining the abnormality such as cracks, erosion and corrosion of a certain section with respect to the pipeline pipe by a digital signal. It is about.

The present invention also provides an apparatus and method for inspecting pipeline pipe sections which display damage conditions and dimensions of damages indicating pipe cracks or pipe erosion and display the results more clearly by enlarging the damage locations. It is about.

In addition, the present invention centrally manages information on each pipe managed by the central server, and by providing a replacement time and replacement location for the pipe with a damage situation to the external administrator terminal, the management is conveniently performed It relates to an inspection device and a method of the pipe section.

<6>

Background Art

[7] In general, conventional apparatuses for inspecting abnormality of pipes constituting a pipeline include a sound source transmitter and a receiver such as an ultrasonic wave, and arrange the pipes arranged between the transceivers so that the sound wave transmission paths of these transceivers coincide. It is configured to check.

As a technology for this, the scale diagnosis method and apparatus of the piping pipe through the ultrasonic detection of the Republic of Korea Patent Publication No. 10-0480966 shown in Figure 1; Guided ultrasound Ultrasonic oscillation means for generating an ultrasonic wave capable of generating a, and receiving an ultrasonic wave signal; Ultrasonic incidence means provided in an ultrasonic incidence portion of a structure to be diagnosed and connected to the ultrasonic oscillation means; Sensing means for detecting induced ultrasonic waves generated in the structure; Control means for controlling the oscillation conditions of the ultrasonic oscillation means and analyzing the induced ultrasonic signal received from the probe means; And a display device for visualizing the ultrasonic signal, the control state, and the like to the operator. Since this technology diagnoses based on the maximum amplitude of the received signal, it is not easy to determine the maximum amplitude from the actual received wave, so the reliability of the diagnosis cannot be expected, and the time measured for the maximum amplitude is measured. This is a technique of determining the location of defects in a pipe by multiplying the velocity with the velocity of guided ultrasonic waves. Therefore, pipes made of various alloy materials or plastic compounds have limitations that cannot be diagnosed.

In addition, the Republic of Korea Patent No. 10-0668800 of Figure 2 relates to a crack position detection device of the pipe, the frame member, the inner surface of the frame member is installed at regular intervals in the circumferential direction and is supported by a hydraulic cylinder A forward movement means having a plurality of front wheel members and a front movement control unit; a rear having a plurality of rear wheel members and a rear movement control unit installed at an inner surface of the frame member at regular intervals in a circumferential direction and supported by a hydraulic cylinder; The longitudinal movement distance of the frame member is calculated based on the number of rotations of the plurality of rear wheel members detected by the moving means and the rear movement control unit, and the radial direction of the ultrasonic element sensing the abnormal signal among the ultrasonic signal members. A control unit for measuring a position, a hinge member provided in the frame member, and It characterized in that it comprises static member and a display for displaying from the control unit receives the radial position of the ultrasonic device for sensing the travel distance and the error signal of the frame member parts. However, this technique measures the cross-sectional direction of the pipeline through mechanical means for transporting the ultrasonic transducer when the pipeline is completely exposed, so that the measurement time over a certain section is long and the configuration of the transportation means is complicated. In addition, it cannot be used in an environment where the pipeline is not exposed, and above all, it is inconvenient to install a separate device for measurement.

As another technique, Korean Patent Laid-Open Publication No. 10-2009-0045208 of FIG. 3 relates to a non-destructive inspection of pipes during manufacture or completion, and mechanically rotates a plurality of ultrasonic transceivers. The pipe non-destructive inspection device, which is configured to pass a pipe through this center, is the main point. This technology also uses multiple ultrasonic transceivers. As well as moving into the system. There is still some inconvenience due to the neural treatment of the existing non-destructive inspection judgment technique by the naked eye.

<1 1>

[Detailed Description of the Invention]

[Technical problem]

As described above, the conventional apparatuses for inspecting the abnormality of a pipe constituting a pipeline include a sound source transmitter and a receiver such as an ultrasonic wave, and measure a time based on the maximum amplitude of the received signal and measure the time. Since it is a technique of determining the position of a defect in a pipe by multiplying the velocity of the guided ultrasonic wave with the guided ultrasonic wave, the pipe composed of various alloy materials or plastic compounds has limitations that cannot be diagnosed.

In addition, when the sound wave transmission paths of the transceivers are configured to be aligned to inspect the pipes arranged between the transceivers, the cross-section of the pipes through mechanical means for transporting the ultrasonic transducers with the pipes fully exposed. It is necessary to measure the direction, the measurement time over a certain section is long, and the configuration of the moving means, etc. has a complex disadvantage.

An object of the present invention is to provide an apparatus and method for inspecting pipeline pipe sections for inspecting pipe sections by only roughly grasping the velocity of sound waves in a material constituting the pipe for a certain section of the pipeline pipe. It is a task.

In addition, an object of the present invention is to provide an apparatus and a method for inspecting a pipeline pipe section for inspecting the abnormality of a certain section of the pipeline pipe at once.

In addition, the present invention is to solve the problem to provide an apparatus and a method for inspecting the pipe pipe section for inspecting the presence or absence of abnormality for a certain section of the pipe pipe without mechanical transport means.

In addition, the present invention is the pipeline pipe section for inspecting the presence or absence of abnormality for a certain section by disposing only the transmission transformer and the receiving converter at the beginning and end of the section for the pipe pipe not buried or exposed It is an object of the present invention to provide an inspection apparatus and a method thereof.

In addition, the present invention is a pipeline pipe structure that provides a more accurate inspection results by calculating and determining the presence or absence of abnormality for a certain section with respect to the pipeline pipe by a digital signal It is an object of the present invention to provide an apparatus for inspecting liver and a method thereof.

In addition, the present invention is to solve the problem to provide an apparatus and method for inspecting the pipeline pipe section that displays the damage situation and the size of the damage indicating the pipe crack or pipe erosion, and enlarges the damage location. do.

In addition, the present invention transmits to the central server through the communication network with the serial number of each pipe having a damage site, the inspection apparatus of the pipeline pipe section for centrally managing information on each pipe managed by the central server and Providing the method is a problem to be solved.

In addition, the present invention is to solve the problem of providing an inspection apparatus and method for the pipeline pipe section to facilitate the management by providing a replacement time and replacement position for the pipe in the damage situation to the external manager terminal. We do with problem to do.

<22>

Technical Solution

In order to solve the above-mentioned problem; The present invention the pipe to be inspected

A transmission transducer 200 causing vibration in the pipe 300; A pillar oscillator 100 for supplying a voltage for generating vibration to the transmission converter 200; A remote switch 720 provided to selectively connect or block the pulse oscillator 100 and the transmission converter 200; and remote control means 710 for controlling the remote switch 720; And a microprocessor 700 for driving the remote control means 710; And a receiving converter for picking up the vibration propagated to the pipe 300 and converting it into an electrical signal at the other end of the pipe 300 away from one end of the transmission converter 200 at a predetermined distance. A reception amplifier 500 for amplifying an electrical signal from the reception converter 400, and an A / D converter 600 for converting an analog signal from the reception amplifier 500 into digital data; And a microprocessor (700) for receiving and processing data from the A / D converter (600). And a test output 800 terminal for outputting the abnormality of the pipe 300 from the microprocessor 700.

Herein, the microprocessor 700 directly integrates the direct wave 740 with respect to the received waveform by taking an absolute value, calculates an average value, and compares the average value with a first reference value in a steady state. The presence of pipe cracks 310 or pipe erosion 320 in the path of the wave is output to the test output 800 terminal and the received waveform is transmitted to imaging modules 900 over time. Accordingly, the imaging modules 900 cut the received waveform of the acquired time unit in a predetermined unit after acquiring the received waveform in the time unit, and corrects the distortion of the received received waveform. A damage situation in which the corrected reception waveform is joined to a plan view, the planarized reception waveform is overlapped and displayed on a plan view of a previously stored pipe image, and the pipe crack 310 or pipe erosion 320 is displayed. It displays the dimension of the damage, characterized in that to enlarge the damage location.

Meanwhile, the imaging caps 900 generate analysis data quantitatively analyzing the number of the damage sites, and centralize the analysis data through a communication network together with a serial number of each pipe having the damage sites. Characterized in that the transmission to the server.

Accordingly, the central server centrally manages information on each of the pipes to be managed, and replaces and replaces positions for pipes having a damage situation indicating the pipe crack 310 or pipe erosion 320. Is provided to an external administrator terminal.

The microprocessor 700 integrates the continuous wave 750 after the portion of the direct wave 740 by the absolute value with respect to the received waveform, calculates an average value, and converts the average value into a normal value of 12 reference values. In comparison, the presence of the pipe corrosion portion 330 in the path of the direct wave is characterized by outputting to the test output 800 terminal.

In order to solve the above-mentioned problem; The present invention is provided with a sound source transmitter and a receiver, and configured to inspect the pipe arranged between the transceiver, the pipe pipe section inspection method, when the inspection method of the pipeline pipe section is started (S100) of the microprocessor 700 A control signal is generated from the remote control means 710 by the output signal, and the remote switch 720 receiving the received signal generates a pulse by connecting the pillar oscillator 100 and the transmission converter 200 to generate a pulse (S110). ; The electrical signal from the receiving converter 400 amplified by the receiving transformer 400 and the receiving amplifier 500 at the other end of the pipe 300 is followed by the field generating step S110. A / D conversion and data input step of storing data in the storage device inside the microprocessor 700 by A / D conversion (S120); Repeating the A / D conversion until the number of samples becomes m for the A / D conversion and data input step (S120) (S130); After repeating the A / D conversion until the number of samples is m (S130), the microprocessor 700 scans the stored A / D conversion data and directly transmits the data to the wave 740 from the data that is higher than or equal to the noise level. A first microprocessor calculation step S140 of reading the corresponding number n of data, taking an absolute value, summing, integrating, calculating an average value, and calculating the average value as a direct wave calculation value yl; Subsequent to the first microprocessor operation (S140), a micropro The parser 700 reads data from the number n to m of the continuous wave 750 after the number n of data corresponding to the direct wave 740, takes an absolute value, sums, integrates, and calculates an average value. A second microprocessor arithmetic step (S150) of calculating a continuous wave calculated value y2; The second microprocessor calculation step (S150), and then comparing the direct wave calculation value yl with the first reference value _yre fl value, which is a measured or set direct wave reference value in a steady state, 1 comparing and determining step (S160); If the direct wave calculation value yl is smaller than the first reference value yrefl value, which is a measured or set direct wave reference value in a steady state, after the first comparison determination step (S160), vibration such as crack or erosion in the pipe 300 is performed. The crack and erosion determination step (S170) of determining that the pipe 300 is in a crack and erosion abnormal state as a factor for attenuating the present condition is performed, and following the first comparison determination step (S160) If the direct wave calculation value yl is not small with respect to the first reference value yrefl value which is measured or set in the steady state, the direct reference value, the cross section normal determination step (S180) of determining the cross section of the pipe 300 as normal; After the crack and erosion determination step (S170) or the cross-sectional normal determination step (S180), the continuous wave calculated value y2 and the normal phase calculated in the second microprocessor calculation step (S150) A second comparison determination step (S190) of comparing the second reference value yref2 value, which is the measured or set continuous wave reference value in the state; If the continuous wave calculated value y2 is larger than the second reference value yref2 which is measured or set in the steady state after the second comparison determination step (S190), the pipe 300 determines that the pipe 300 is in a corroded state. The corrosion determination step (S200); and if the continuous wave calculated value y2 is not large for the second reference value yref2 value, which is the measured or set constant wave reference value in a steady state, following the second comparison determination step (S190). Corrosion normal determination step S200 of determining that the pipe corrosion part 330 does not exist in the 300 or is within an allowable corrosion range limit; After acquiring the electrical signal from the receiving converter 400 amplified by the receiving amplifier 500 in time units, the received waveform in time units obtained is cut in a predetermined unit, and the distortion of the received received waveforms is cut. Correcting and bonding the corrected received waveform to the plan view cotton (S300); The planarized reception waveform is displayed by overlapping the planar view of the previously stored pipe image, and the damage situation and the dimension of the damage indicating the pipe crack 310 or the pipe erosion 320 are displayed, and the damage position is enlarged. Displaying step S310; Characterized in how to perform.

Here, after the step (S310), to generate the analysis data quantitatively analyzing the number of the damage site, the analysis data to the central server through the communication network with the serial number of each pipe having the damage site Transmitting (S320); And the central server, Centrally managing information on each of the pipes to be managed, and providing a replacement time and replacement location for the pipe with a damage situation indicating the pipe crack 310 or pipe erosion 320 to an external manager terminal (S330); It is characterized by further performing.

<3i> In this case, the sample number m for the A / D conversion and data input step (S120) is cp / sec, the sound velocity of the pipe 300 material, from the transmission converter 200 to measure the reception converter ( When the distance to 400 is lni, the time for A / D conversion of one sample is ts, the transmission time of the direct wave 740 is U, and the duration is Δΐ, the number of samples m = [(cp / sec / (lm * ts)} + tt / ts + At / ts].

<32>

Advantageous Effects

The present invention described above has the following effects.

First, according to the present invention, there is an effect of allowing the pipe section to be inspected by roughly grasping the velocity of sound waves in the material constituting the pipe.

Second, the present invention has the effect of shortening the inspection time compared to the existing point-to-point inspection technology by inspecting the abnormality of a certain section of the pipeline pipe at once.

Third, the present invention has a technical effect of allowing a short period of time to check the abnormality of a certain portion of a pipeline pipe without a mechanical conveying means.

Fourth, the present invention is a magnetostrictive phenomenon for a pipeline pipe that is buried or unexposed

Only the transmitter and the receiver using the magnetostrictive effect are disposed at the beginning and the end of a section, thereby providing convenience for checking whether there is an abnormality in a section.

Fifth, the present invention has the effect of providing a more accurate test results by calculating and determining the presence or absence of abnormality for a certain section with respect to the pipeline pipe by a digital signal.

Sixth, the present invention displays the damage situation and the dimensions of the damage indicating the pipe crack or pipe erosion, and has an effect of providing an enlarged display of the damage position.

Seventh, the present invention has the effect of centrally managing information about each pipe managed by the central server when transmitted to the central server through the communication network with the serial number of each pipe having a damage site.

Eighth, the present invention provides a replacement timing and replacement position for a pipe that is damaged. By providing it to an external administrator terminal, there is an effect that the management is convenient.

<42>

[Brief Description of Drawings]

1 is an example of a scale diagnostic method and apparatus of a pipe pipe through conventional ultrasonic detection,

2 is an example of a crack position detection apparatus of a conventional pipe,

Rr 3 is an example of a non-destructive inspection for pipes in the prior art during manufacture or completion,

tr

4 is a schematic diagram of the pipe crack and pipe erosion test of the present invention.

5 is a schematic diagram of a pipe corrosion inspection of the present invention,

6 is a configuration of the inspection device for the pipeline pipe section according to an embodiment of the present invention,

FIG. 7 is an explanatory diagram of a test waveform of a pipeline pipe section according to an embodiment of the present invention.

8 is a flowchart illustrating a method of inspecting a pipeline pipe section according to an embodiment of the present invention.

9 is a flow chart of a method for inspecting pipeline pipe sections according to another embodiment of the present invention.

<52>

[Form for implementation of invention]

The present invention includes a pipe to be inspected; and a transmission transducer causing vibration to the pipe 300; A pillar oscillator for supplying a voltage for generating vibration to the transmission converter; A remote switch provided to selectively connect or block the pillar oscillator and the transmission converter; and remote control means for controlling the remote switch; And

And a microprocessor for driving the remote control means, and receiving at the other end of the pipe away from the one end where the transmitter is located to pick up the vibration propagated to the pipe and converting it into an electrical signal. A reception amplifier for amplifying an electrical signal from the reception converter, and an A / D converter for converting an analog signal from the reception amplifier into digital data; And a microprocessor for processing and receiving data from the A / D converter. A test output terminal for outputting the abnormality of the pipe from the microprocessor;

Of the pipeline pipe section using a microprocessor, In the inspection apparatus,

The microprocessor 700,

The absolute value of the direct wave 740 is integrated with the received waveform, the average value is calculated, and the average value is compared with the first reference value in the steady state to obtain the pipe crack 310 of the path of the direct wave. The present invention provides an inspection apparatus for a pipeline pipe section using a microprocessor, which outputs the presence or absence of the pipe erosion 320 to the test output 800 terminal.

In addition, the present invention is a test method using the inspection device of the pipeline pipe section using the microprocessor, when the inspection method of the pipeline pipe section is started, the control signal from the remote control means by the output signal of the microprocessor A pulse generating step in which the generated and received remote switch generates a pulse by connecting the pillar oscillator and the transmission converter; Following the field generation step, the microprocessor A / D converts an electrical signal from the receiver transducer located at the other end of the pipe and the receiver transducer amplified by the receiver amplifier to store data in a memory inside the microprocessor. / D conversion and data entry stages; Repeating A / D conversion for the A / D conversion and data input step until the number of samples becomes m; After repeating the A / D conversion until the number of samples becomes m, the microprocessor scans the stored A / D conversion data and reads the number n of data corresponding to the direct wave from the data that is higher than or equal to the noise level. A first microprocessor calculating step of taking a value, adding it, ie integrating, calculating an average value, and calculating it as a direct wave calculation value yl; Said first microprocessor open reading data to the acid number of samples from step a microprocessor Direct wave n data is saempol number of continuous wave after _n ~ m takes the absolute value sum that is, one after the average value of the integral A second microprocessor calculating step of calculating a value and calculating the value as a continuous wave calculated value y2; A first comparison determination step of comparing the direct wave calculation value yl with the first reference value yrefl value after the second microprocessor calculation step is a direct wave reference value measured or set in a steady state; In the case where the direct wave calculated value yl is smaller than the first reference value yrefl value which is measured or set in the normal state after the first comparison determination step, there is a factor that attenuates vibration in the pipe such as crack or erosion. Performing a crack and erosion determination step of determining that the pipe is in a crack and erosion abnormal state as being present;

If the direct wave calculation value yl is measured in a steady state or not smaller than the first reference value yrefl value which is a set direct wave reference value following the first comparison determination step, Performing a normal section determination step of determining a section as normal;

A system for comparing the continuous wave calculated value y2 calculated in the second microprocessor operation step with the second reference value yref2 value measured or set in the steady state following the crack and erosion determination step or the cross-sectional normal determination step. 2 comparative judgment step; A pipe corrosion determination step of determining that the pipe is in a corrosion state when the continuous wave calculated value y2 is larger than the second reference value yref2 value which is the measured or set sustain wave reference value in the steady state after the second comparison determination step; If the continuous wave calculation value y2 is not large for the second reference value yref2 value measured or set in the steady state following the step 2 comparison and determination step, the pipe corrosion portion is not present in the pipe or the allowable corrosion is performed. It provides a method for inspecting a pipeline pipe section using a microprocessor, characterized in that the corrosion normal determination step judged to be within the limits.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In adding reference numerals to the following drawings and components, the same components, even if displayed on the other drawings to have the same reference numerals as possible, it is known that unnecessarily obscure the subject matter of the present invention Detailed description of functions and configurations will be omitted.

When the transmission converter 200 is installed at one end of the pipe 300 and a pulse wave voltage is applied to the transmission converter 200, the transmission converter 200 generates vibrations according to the applied voltage. At this time, a vibration such as a pulse wave voltage applied to the inside of the pipe 300 is transmitted in the pipe 300. The pulse wave vibration generated in the pipe 300 includes components such as a longi tudinal wave, a transverse wave, a shear wave, and the like, and an apparatus and method for inspecting a pipe section of the present invention In the same material, longi tudinal waves are measured as vibrations with the fastest propagation speed and the largest signal component in the same material. In order to measure only longi tudinal waves with respect to components such as longi tudinal waves, transverse waves, and shear waves generated by the pulse wave oscillation of the transmission transducer 200. Adopt a receiver 400 as a longitudinal mode transducer or a transducer having the output of the full modes of longi tudinal wave, transverse wave and shear wave. This can be achieved by using only the output in the corresponding vibration direction. The longitudinal wave component vibrations of the transmission wave generated from the transmission converter 200 of FIG. 4 propagate along the inner wall of the pipe 300. Of course, some vibration may be transmitted to a fluid such as a liquid or a gas flowing through the inside of the pipe 300, but the acoustic impedance of the metal constituting the pipe 300 may be a liquid or a gas. Since it is larger than the acoustic impedance, most vibrations are transmitted into the wall of the pipe 300 by the boundary condition. In addition, the vibration is attenuated naturally because part of the vibration energy is consumed as heat according to the distance when the vibration is transmitted into the wall of the pipe 300.

In this case, if a crack is present in the pipe 300, that is, a crack is present, the crack 310 may have an acoustic impedance of a metal body constituting the pipe 300. Since it has a different acoustic impedance, it reflects a part of the vibration energy generated from the excitation coil 200 and passes only part of it. In addition, when there is an erosion portion in the pipe 300, that is, the pipe erosion 320, the pipe erosion 320 has a reduced cross-sectional area compared to the normal cross section of the metal body constituting the pipe 300. As a result of this configuration, it has an acoustic impedance different from the acoustic impedance of the normal cross section and reflects a part of the vibration energy generated from the transmission converter 200 and passes only a part thereof.

Therefore, when the vibration generated from the transmission converter 200 is transmitted through the pipe 300 having no abnormality, the natural attenuated vibration is located at a point away from the transmission converter 200 by a predetermined distance. Received by the receive converter 400. If there is a pipe crack 310 or a pipe erosion 320 on the transmission path of the vibration, ie, the wall of the pipe 300, due to reflection caused by the pipe crack 310 or the pipe erosion 320, etc. The attenuated vibration is transmitted to the reception converter 400 which is separated from the transmission converter 200 by a predetermined distance than the natural attenuation vibration.

5 is a schematic diagram of a pipe corrosion inspection of the present invention. The longitudinal component vibrations of the transmission wave generated from the transmission converter 200 of FIG. 5 propagate along the inner wall of the pipe 300. Of course, some vibration may be transmitted to a fluid such as a liquid or a gas flowing through the inside of the pipe 300, but the acoustic impedance of the metal constituting the pipe 300 may be a liquid or a gas. Because of the large acoustic impedance, the vibration is transmitted to the inside of the wall of the pipe 300 by the boundary condition (acoust boundary boundary). In addition, the vibration is attenuated naturally because part of the vibration energy is consumed as heat depending on the distance when the vibration is transmitted to the inside of the wall of the pipe (300). All.

At this time, if the corroded portion in the pipe 300, that is, the pipe corrosion portion 330 is present, the pipe corrosion portion 330 is the acoustic impedance of the metal body constituting the pipe 300 Since it has a different acoustic impedance similar to the acoustic ic impedance, at the interface between the pipe 300 and the pipe corrosion portion 330, it reflects a part of the vibration energy generated from the transmission converter 200 and passes through the rest. It will be tall. In addition, the vibration transmitted to the pipe erosion portion 330 in the pipe 300 causes reflection at the mirror interface between the pipe erosion portion 330 and the portion of the pipe erosion portion 330 flows.

Therefore, when the vibration generated from the transmission converter 200 is transmitted through the pipe 300 having no abnormality, the natural attenuated vibration is located at a point away from the transmission converter 200 by a predetermined distance. When the pipe corrosion part 330 is present on the wall of the pipe 300 while being received by the reception converter 400, a predetermined reflection from the transmission converter 200 is caused by the reflection caused by the pipe corrosion part 330. The oscillator with the diffused reflection oscillation delayed more than the transmission time of the transmission wave is transmitted to the receiver converter 400 which is far away.

The present invention propagates longitudinal wave vibrations inside the pipe 300 with the transmission converter 200 to the pipe 300 by using the above-described physical properties, and receives the vibration at a predetermined distance. Picking up the converter 400 and analyzing it with a microprocessor, it is characterized in that the pipe crack 310, pipe erosion 320 and pipe erosion portion 330, etc. in the pipe 300 to determine the abnormality. In this case, a predetermined distance from the transmitter 200 to the pipe 300 and the transmitter 200 to the receiver converter 400 may replace the pipe 300 when an abnormality of the pipe 300 is found. It is suitable to set in units that can be, and the above-described transmission converter 200 and the receiving converter 400 may be fixedly arranged in the pipe (300). In addition, the transmission converter 200 and the device for driving the drive converter 200 and the microprocessor is characterized in that the wireless drive.

On the other hand, the imaging modules 900 are wired to the microprocessor and receive the received waveform, which is the longitudinal wave vibration picked up by the receiver 400 through the pipe 300 of the replaceable unit. It is received from the microprocessor according to the flow and stored in the storage unit 910.

The imaging modules 900 acquire the received waveform in the time unit of the conduit, and then cut the received waveform in the acquired time unit in a predetermined unit, correct the distortion of the truncated received waveform, and correct the received received signal. Bond the waveforms to the top view. Then, the image caps 900 overlap the planar view of the received waveform with the planar view of the prestored pipe image and display a damage situation indicating the pipe crack 310 or the pipe erosion 320. The size of the damage is displayed, the location of the damage is magnified and the analysis data is generated quantitatively.

The imaging modules 900 transmit the analysis data to the central server through the communication network together with the serial number of each pipe having the damage site.

Accordingly, the central server centrally manages information on the pipes to be managed, and provides the external manager terminal with a replacement time and a replacement location for the pipe in question.

The administrator terminal holder can manage each pipe with reference to the replacement time and the replacement location.

<77>

Hereinafter, the feature and configuration of the inspection device for the magnetic pipe pipe section of the present invention will be described in detail with reference to FIG.

FIG. 6 illustrates the configuration of an inspection apparatus for a pipeline pipe section according to an embodiment of the present invention. The inspection apparatus of the pipeline pipe section of the present invention; A pipe oscillator 100 for generating vibration to the pipe 300 and the pipe, a pulse oscillator 100 for supplying a voltage for generating vibration to the transmitter converter 200, the pulse oscillator 100 and the transmitter converter Remote switch 720 provided to selectively connect or block 200, remote control means 710 for controlling the remote switch 720 and the microprocessor 700 for driving the remote control means 710 It is composed. The remote switch 720 and the remote control means 710 for controlling the remote switch 720 are connected to the remote control means 710 by an output signal of the microprocessor 700 (eg, an output port signal). A control signal is generated from the remote switch 720 is configured to selectively connect or disconnect the pillar oscillator 100 and the transmission converter 200, the remote switch 720 and the remote switch ( The remote control means 710 for controlling the 720 may use infrared, electromagnetic waves or wired or wireless communication method as needed. In addition, at the other end of the pipe 300, which is located at a predetermined distance from one end of the transmitting converter 200, a receiving converter for picking up the vibration propagated to the pipe 300 and converting it into an electrical signal ( 400 and a receiving amplifier 500 for amplifying electrical signals from the receiving converter 400 and an A / D converter 600 for converting analog signals from the receiving amplifier 500 into digital data. From the A / D converter 600 And a test output 800 terminal for processing and analyzing the data by the microprocessor 700 and outputting the abnormality of the pipe 300.

In addition, in the inspection device for the pipeline pipe section according to an embodiment of the present invention, by picking up the vibration propagated from the one end of the transmission converter 200 to the pipe 300 as an electrical signal The predetermined distance to the receiver transducer 400 for conversion is set in units that can replace the pipe 300 when an abnormality of the pipe 300 is found.

FIG. 7 illustrates an inspection waveform of a pipeline pipe section according to an embodiment of the present invention. FIG. 7 illustrates the relationship between waveforms for determining whether there is an abnormality in the pipe 300 by analyzing the data received from the A / D converter 600 of FIG. 6 by processing the microprocessor 700. The waveform on the time axis at the top of the figure shows the transmission wave 730 generated from the transmission converter 200 as described above in FIG. 6, and the waveform at the bottom shows the reception converter ( 400 shows the waveform received. First, when the transmission wave 730 is generated from the transmission converter 200 during the transmission time tt and the vibration is propagated through the pipe 300 described above, the transmission converter 420 is separated by a transmission time tp from the predetermined distance. The direct wave 740, which is attenuated by the transmission wave 730 generated during the transmission time tt, is first transmitted, followed by the continuous wave 750 due to the diffuse reflection inside the pipe or the diffuse reflection by the pipe corrosion part 330. It is received over this duration A t.

Therefore, the microprocessor 700 described with reference to FIG. 6 takes the absolute value of the direct wave 740 portion of the received waveform, calculates the magnitude of the signal, and compares it with the first reference value in the steady state. If the magnitude of the signal calculated with respect to the first reference value is small, it may be determined that the pipe crack 310 or the pipe erosion 320 exists in the path of the direct wave as illustrated in FIG. 4. In this case, the first reference value is preferably integrated for the direct wave input over a certain period of the steady state pipe, and the average value is calculated to make this value the first reference value.

In addition, the microprocessor 700 calculates the magnitude of the signal by taking an absolute value of the continuous wave ₇₅₀ after the portion of the direct wave 740 with respect to the received waveform and compares it with a second reference value in a steady state. do. If the magnitude of the signal calculated for 2 reference values is large, a large amount of diffuse reflection occurs, and as illustrated in FIG. 4, it may be determined that the pipe corrosion portion 330 exists in the path of the direct wave. At this time, the second reference value preferably integrates the inputted continuous wave over a period of the steady state pipe and calculates an average value. This value is used as the second reference value, and it is preferable to set the duration at least one time longer than the transmission time Δ 1; for more accurate determination.

<85>

In the pipe crack 310, the pipe erosion 320, and the pipe erosion part 330, the absolute value of the signal data input by the microprocessor 700 is set in FIG. 6. Integrating the waveform data input over and calculate the average value and compares this value with the reference value characterized in that the output of the pipe 300 to the test output (800) terminal.

Hereinafter, the feature and configuration of the inspection method of the pipe section of the present invention will be described in detail with reference to FIG.

FIG. 8 is a diagram illustrating a process of generating pulses by the microprocessor 700 and receiving and receiving data from the A / D converter 600 in the inspection device for the pipeline pipe section shown in FIG. 6 of the present invention. The flow chart of inspection method of pipeline pipe section is shown.

When the inspection method of the pipeline pipe section is started (S100), the microprocessor 700 generates a control signal from the remote control means 710 by the output signal of the microprocessor 700 of FIG. The remote switch 720 connects the pillar oscillator 100 and the transmission converter 200 to perform a pillar generation step S110 for generating a pulse.

Subsequent to the pillars generating step S110, the microprocessor 700 may include the pipe.

Memory inside the microprocessor 700 by A / D conversion of the electrical signal from the receiver converter 400 positioned at the other end of the receiver 300 and the receiver converter 400 amplified by the receiver amplifier 500. A / D conversion and data input step S120 for storing in a device (not shown) is performed, and the A / D conversion and data input step S120 is such that the number of input samples is m a predetermined number. Continues until. In this case, the number m of samples to be input is a sample that can be A / D converted during the time required for the receiver converter 400 to pick up the vibration generated from the transmitter converter 200 and propagated to the pipe 300. It is set based on the number.

In other words, when the sound velocity of the pipe 300 material is cp / sec, the distance from the transmit converter 200 to the receive converter 400 to be measured is lm. The propagation time of vibration generated from) is cp / sec / lm [sec]. If the time for A / D conversion of one sample is ts, the vibration generated from the transmission converter 200 The number of waiting samples to convert can be calculated as cp / sec / (lm * ts). The number of samples of the direct wave 740 is tt / ts with respect to the transmission time and the number of samples with the duration is / ts, so the total number of samples m = [{cp / sec / (lm * ts)} + tt / ts + A t / ts].

Hereinafter, the sample number will be described as an example to more clearly specify the number of samples. When the material of the pipe 300 to be measured is made of iron, a typical sound speed is 5800 [m / sec]. If the distance lm from the transmit converter 200 to the receive converter 400 is 11.6 [m], the transmission time of the vibration generated from the transmit converter 200 becomes 2 [msec], and one sample is A When the time of / D conversion is 10 [ysec], the number m of waiting samples required for A / D conversion of the received waveform is 200. At this time, if the transmission time U of the transmission wave 730 described in FIG. 7 is 100 [usee], the number of samples of the direct wave is 10, and the duration Δ1 of the sustain wave 750 is 200 [ysec, which is twice the transmission time U. If set to], the number of samples of continuous waves is 20, so the total number of samples is set at least 230. Therefore, in the above example, it can be designed to continue until the number of input samples of the A / D conversion and data input step (S120) is 230 or more.

The number m of samples described above is the minimum number of samples necessary for receiving the vibration generated from the transmission converter 200 at the reception converter 400 and performing all A / D conversions. It is preferable to set the appropriate number m of samples so that the number of samples calculated as m = [{cp / sec / (lm * ts)} + tt / ts + A t / ts] is larger than that.

Therefore, in the present invention, the number of samples m repeating the A / D conversion is m;

The sound velocity of the pipe 300 material is cp / sec, the distance from the transmitter 200 to the receiver converter 400 to be measured is lm, and the time for A / D conversion of one sample is directly ts. When the transmission time of the wave 740 is tt and the duration is At,

<96>

* Number of samples m = a value greater than m calculated by [{cp / sec / (lm * ts)} + tt / ts + At / ts].

When the number of samples input in the A / D conversion and data input step (S120) reaches a predetermined number m, the internal memory of the microprocessor 700 starts from the time when vibration is generated from the transmission converter 200. The A / D conversion data until receiving all the vibration in the receiving converter 400 is stored.

When the step of repeating the A / D conversion until the number of samples becomes m (S130) is completed, the microprocessor 700 scans the stored A / D conversion data to be above the noise level. A first microprocessor operation step of reading the number n pieces of data corresponding to the direct wave 740 of FIG. 7 from the data, taking an absolute value, summing, integrating, and calculating an average value to calculate the average wave value yl. S140).

<ιοο> After the first microprocessor operation (S140), the absolute value is obtained by adding data up to the number n to m of the continuous wave 750 after the number n of data corresponding to the direct wave 740, and summing. In operation S150, after the integration, the average value is calculated to calculate the average wave value y 2.

After the second microprocessor operation S150, a first comparison determination step S160 is performed in which the direct wave calculation value yl is compared with the first reference value yrefl value which is a direct wave reference value measured or set in a normal state. do. At this time, if the linear calculation value yl is small with respect to the first reference value yrefl value measured or set in the normal state, the vibration damping factor such as crack or erosion exists in the pipe 300. After the crack and erosion determination step S170 of determining that the pipe 300 is in a crack and erosion abnormal state, the direct wave calculated value yl is a direct wave reference value measured or set in a steady state with respect to 1 reference value yrefl value. If not small, the second comparison determination step S190, which is a next step, is performed after the cross-sectional normal determination step S18. In the second comparison determination step (S190), the continuous wave calculated value y2 calculated in the second microprocessor calculation step (S150) is compared with the second reference value yref2 value which is the measured or set continuous wave reference value in the steady state. In this case, when the continuous wave calculated value y2 is larger than the second reference value yref2 value measured or set in the steady state, the pipe corrosion part 330 is present in the pipe 300 and thus more diffuse reflection occurs than normal. After the pipe corrosion determination step S200 in which the pipe 300 is determined to be in a corrosion state, and if the continuous wave calculated value y2 is not large with respect to the measured second reference value yref2 value that is measured or set in the steady state, After the pipe corrosion part 330 does not exist in the pipe 300 or is determined to be within an allowable corrosion range limit, the inspection method of the pipeline pipe section of the present invention is terminated.

<102>

FIG. 9 is a diagram illustrating a process for generating a pulse by the microprocessor 700 and receiving and receiving data from the A / D converter 600 in the inspection device for the pipeline pipe section shown in FIG. 6 of the present invention. After inspection method of pipeline pipe section, flow chart for generating and utilizing analysis data is shown.

After the step S130 or after the step S220, the imaging module 900 is a microprocessor. After acquiring the received waveform, which is an electrical signal from the receiver converter 400 amplified by the receiving amplifier 500 from the parser 700 in time units, the received waveform in time units obtained is cut in a predetermined unit, Corrects the distortion of the received received waveform is cut, and is combined with the corrected received waveform all flat (S300).

After operation S300, the image caps 900 overlap the planar view of the received waveform with the planar surface of the pipe image pre-stored in the storage unit 910, and the pipe crack 310 described with reference to FIG. 8. ) And the damage situation indicating the pipe erosion (320) and the dimensions of the damage, and to enlarge the damage location (S310).

After the step S310, the imaging hairs 900 generate analysis data quantitatively analyzing the number of the damage sites, and centralize the analysis data through the communication network together with the serial number of each pipe having the damage sites. Send to the server (S320).

The central server manages information on each pipe managed by the axle, and replaces the replacement time and the location of the pipe with a damage situation indicating the pipe crack 310 or the pipe erosion 320 with an external manager terminal. Provided (S330).

<108>

As described above, the inspection apparatus and the method of the pipeline pipe section using the microprocessor of the present invention when the vibration is generated by using the microprocessor from the pipe 300 and the transmission converter 200 installed in the pipe (300). By receiving the vibration by the receiving converter 400 and calculating and comparing the waveform with the microprocessor 700, it is possible to easily determine whether there is an abnormality such as crack, erosion, and corrosion of the pipe section of the pipeline. Depending on the needs of those skilled in the art, various design modifications are possible, such as a fixed installation of an inspection device in a pipeline pipe section on an inspection object and an inspection also performed remotely through an additional communication means in a microprocessor.

Although the present invention has been described by means of a limited embodiment and drawings, the present invention is not limited to this and should be described by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the appended claims.

<1 1 1>

Claims

[Range of request]

[Claim 11

Pipe 300 to be inspected; and

A transmission converter 200 generating vibration in the pipe 300;

A pillar oscillator 100 for supplying a voltage for generating vibration to the transmission converter 200;

A remote switch 720 provided to selectively connect or block the pillar oscillator 100 and the transmission converter 200; and

Remote control means (710) for controlling the remote switch (720); And

A microprocessor 700 for driving the remote control means 710;

Equipped with

A receiver transducer 400 for picking up the vibration propagated to the pipe 300 and converting it into an electrical signal at the other end of the pipe 300 spaced a predetermined distance from one end of the transmission converter 200 is located. ;Wow

A reception amplifier (500) for amplifying an electrical signal from the reception converter (400); and an A / D converter (600) for converting an analog signal from the reception amplifier (500) into digital data; And

A microprocessor 700 for receiving and processing data from the A / D converter 600;

A test output (800) terminal for outputting the abnormality of the pipe (300) from the microprocessor (700);

In the inspection apparatus of the pipeline pipe section using a microprocessor,

The microprocessor 700 is,

The absolute value of the direct wave 740 is integrated with respect to the received waveform, the average value is calculated, and the average value is compared with the first reference value in the steady state, so that the pipe crack 310 or the pipe erosion of the direct wave path ( Outputting the presence or absence of the signal to the test output 800 terminal and transmitting the received waveform to the imaging modules 900 as time passes.

After the received waveforms are acquired in units of time, the imaging modules 900 cut the received waveforms of the acquired time units in a predetermined unit, correct distortion of the received received waveforms, and planarize the corrected received waveforms. Bonded with cotton,

The planarized receive waveform is over the planar plane of the previously stored pipe image. Apparatus for inspecting pipeline pipe sections using a microprocessor characterized in that the wrapping and display, indicating the damage situation and the dimensions of the damage indicating the pipe crack 310 or pipe erosion 320, and enlarges the damage location .

[Claim 2]

The method of claim 1, wherein the imaging caps 900,

Generating analysis data quantitatively analyzing the number of damaged parts, and transmitting the analyzed data along with the serial number of each pipe having the damaged parts to a central server through a communication network, pipeline pipe section using a microprocessor Inspection apparatus.

[Claim 3]

The method of claim 2, wherein the augmentation server,

Centrally manage information about each managed pipe,

Apparatus for inspecting pipeline pipe sections using a microprocessor to provide a replacement time and replacement position for the pipe with a damage situation indicating the pipe crack 310 or pipe erosion 320 to an external manager terminal.

[Claim 4]

The method according to any one of claims 1 to 3,

The microprocessor 700 takes an absolute value and integrates the continuous wave 750 after the portion of the direct wave 740 with respect to the received waveform, calculates an average value, and compares the average value with a crab reference value in a steady state. An apparatus for inspecting pipeline pipe sections using a microprocessor, characterized by outputting the presence or absence of a pipe corrosion section 330 in a path of contact to a test output 800 terminal.

[Claim 5]

In the inspection method of the pipeline pipe section having a sound source transmitter and a receiver, and configured to inspect the pipe arranged between the transceiver,

When the inspection method of the pipeline pipe section is started (S100),

The control signal is generated from the remote control means 710 by the output signal of the microprocessor 700 and the remote switch 720 which receives the signal is transmitted to the pillar oscillator 100. A pulse generating step S110 for connecting the transducer 200 to generate a fill;

The electrical signal from the receiving converter 400 amplified by the receiving converter 400 and the receiving amplifier 500 located at the other end of the pipe 300 is followed by the field generating step S110. A / D conversion and data input step (S120) of storing the data in the storage device inside the microprocessor 700 by A / D conversion;

Repeating the A / D conversion for the A / D conversion and data input step (S120) until the number of samples becomes m (S130);

After repeating the A / D conversion until the number of samples becomes m (S130), the microprocessor 700 scans the stored A / D conversion data and starts direct data from the data that is higher than or equal to the noise level. A total 1 microprocessor operation step (S140) of reading the number n of data corresponding to the absolute value, adding, ie, integrating, calculating the average value, and calculating the average value as a direct wave calculation value yl;

After the first microprocessor operation S140, the microprocessor 700 reads data from the number n to m of the continuous wave 750 after the number n of data corresponding to the direct wave 740 to the absolute value. A second microprocessor calculation step (S150) of taking and summing, ie, integrating and calculating an average value to calculate a continuous wave value _y 2;

A first comparison determination step (S160) of comparing the second microprocessor operation (S150) with a direct wave calculation value yl and a first reference value yrefl value which is a direct wave reference value measured or set in a normal state;

Following the first comparison determination step (S160)

When the direct wave calculated value yl is small with respect to the first reference value yrefl value, which is measured or set in the steady state, the pipe 300 has a factor that attenuates vibration, such as crack or erosion, in the pipe 300. Performing a crack and erosion determination step (S170) determining that the 300 is a crack and erosion abnormal state;

If the direct wave calculation value yl is measured or set in the steady state after the first comparison determination step S160 is not smaller than the 1 reference value yrefl value, the cross section of the pipe 300 is determined to be normal. Performing a cross-sectional normal observation step (S180); and calculating a continuous wave value y2 calculated in the second microprocessor calculation step (S150) following the crack and erosion determination step (S170) or the cross-sectional normal determination step (S180). And a second comparison determination step (S190) of comparing the second reference value yref2 value, which is the measured or set sustain wave reference value in the steady state;

Following the second comparison determination step (S190), the continuous wave calculated value y2 is measured in a steady state. If it is large for the second reference value yref2 value that is a predetermined or set sustain wave reference value, the pipe corrosion determination step (S200) of determining that the pipe 300 is in a corrosion state is performed.

If the continuous wave calculated value y2 is not large for the second reference value yref2 value which is measured or set in the steady state after the second comparison determination step (S190), the pipe corrosion part ( 330 is a corrosion normal determination step (S200) which is determined that does not exist or is within the allowable corrosion range limit;

After acquiring the electrical signal from the receiving converter 400 amplified by the receiving amplifier 500 in units of time, the received waveform of the obtained time unit is cut in a predetermined unit, and the distortion of the received received waveform is corrected. And bonding the corrected received waveform to the plan view cotton (S300);

The planarized reception waveform is displayed by overlapping the planarized plane image of the previously stored pipe image, displaying the damage situation and the dimension of the damage indicating the pipe crack 310 or the pipe erosion 320, and expanding the damage location. Displaying step S310; Method of inspection of pipeline pipe section using a microprocessor, characterized in that for performing the method.

[Claim 6]

The method according to claim 5, after the step S310,

Generating analysis data quantitatively analyzing the number of the damaged parts, and transmitting the analyzed data to the central server through a communication network together with the serial number of each pipe having the damaged parts (S320); And

The central server manages the information on each pipe managed by the central server, and when the replacement of the pipe with a damage situation indicating the pipe crack 310 or pipe erosion 320 and the replacement location of the external manager terminal Providing the step (S330); The inspection method of the pipeline pipe section using a microprocessor, characterized in that for further performing.

[Claim 7]

The method of claim 5,

The number of samples m for the A / D conversion and data entry step (S120) is

The sound velocity of the pipe 300 material cp / sec, the transmission converter 200 to be measured When the distance from the receiver 400 to l _m , A / D conversion of one sample, ts is the transmission time of the direct wave 740, and the duration is At.

A number of samples m = [{cp / sec / (lm * ts)} + tt / ts + A t / ts] A test method for a pipeline pipe section using a microprocessor, characterized in that the value is larger than m.