WO2012173290A1 - Apparatus and method for inspection of section of magnetic conduit pipe using magnetostrictive effect - Google Patents

Abstract

The present invention relates to an apparatus and a method for inspecting a section of a magnetic conduit pipe using magnetostrictive effect, the appartus comprising: a pipe (300) formed from a magnetic substance; an exciter coil (200) for inducing the magnetostrictive effect, which consequently causes longitudinal vibrations in the pipe, the exciter coil (200) being set by unit which enables replacement of the pipe when an abnormality is discovered in the pipe, the affected section of the pipe can be replaced; a sine wave generator (100) for providing the electric current for creating a magnetic field in the exciter coil (200); a switch (710) for selectively connecting or disconnecting the sine wave generator (100) to and from the exciter coil (200); a microprocessor (700) for obtaining absolute values for signal data by controlling the switch (710), and for integrating the waveform data input over a set section and for calculating an average value; a reception converter (400), which is on one end of the pipe separated by a predetermined distance from the other end of the pipe (300) on which the exciter coil (200) is positioned, for picking up the vibration propagated from the pipe (300) and converting the vibration into an electronic signal; a reception amplifier (500) for amplifying the electronic signal from the reception converter (400); an A/D converter (600) for converting an analog signal from the reception amplifier into digital data; and a test output (800) terminal for outputting whether abnormalities exist in the pipe (300) after receiving data from the A/D converter (600), and analyzing the data values calculated by the microprocessor (700), wherein as the microprocessor (700) transmits the received waveform data over time to a visualization module (900), the visualization module (900), after acquiring the received waveform data by time, cuts same into a set unit size, corrects distortions in the cut and received waveform data, maps the corrected and received waveform data onto a plan, displays the mapped and received waveform data, which has been planned, onto a pre-stored plan of a pipe images 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 damage.

Description

Inspection device and method of magnetic pipe section using magnetostriction

The present invention relates to a device for inspecting a magnetic pipe section using magnetostriction, and a method thereof. The present invention relates to a method for inspecting abnormality of a certain section of a magnetic pipe by using a magnetostrictive effect. The present invention relates to a device for inspecting a magnetic pipe section and a method thereof.

In addition, the present invention can examine the presence or absence of abnormality for a certain section of the magnetic pipe pipe without mechanical transport means, only the coil and the receiving transducer at the beginning and end of the predetermined section for the embedded or unexposed magnetic pipe pipe The present invention relates to an apparatus and a method for inspecting a magnetic pipe line for excavation and inspection of abnormality in a predetermined section.

The present invention also relates to an apparatus and a method for inspecting a magnetic pipe line for providing a more accurate test result by calculating and determining the abnormality of a certain section with respect to the magnetic pipe line by a digital signal.

The present invention also relates to an apparatus and method for inspecting a magnetic pipe section for displaying a damage situation and a dimension of a damage that indicates a pipe crack and displaying the result more clearly by enlarging the damage location.

In another aspect, the present invention provides a magnetic pipe pipe to easily manage the information by centrally managing the information on each pipe managed by the central server, and to provide a replacement time and replacement location for the pipe that is damaged to the external administrator terminal An inspection apparatus of a section and a method thereof.

In general, the conventional apparatus for inspecting the abnormality of the pipe constituting the pipe line includes a sound source transmitter and a receiver such as an ultrasonic wave, and the sound wave transmission paths of these transceivers are aligned so that the pipes arranged between the transceivers can be inspected. It is composed.

As a technique for this, Korean Patent No. 10-0668800 shown in FIG. 1 relates to a crack position detecting apparatus of a pipe, and is installed at regular intervals in a circumferential direction on a frame member and an inner surface of the frame member and is provided by a hydraulic cylinder. A forward movement means having a plurality of front wheel members and a front movement control unit supported, and a plurality of rear wheel members and rear movement control units installed on the inner surface of the frame member at regular intervals in the circumferential direction and supported by a hydraulic cylinder; The longitudinal movement distance of the frame member is calculated from the number of rotations of the rear movement means and the plurality of rear wheel members detected by the rear movement control unit, and the radial direction of the ultrasonic element sensing the abnormal signal among the ultrasonic signal members. Control unit for measuring the position and the hinge portion provided in the frame member And it characterized in that it comprises a fixed member, a member from the control frame transfer distance and receives the radial position of the ultrasonic device for sensing the signal received over the display unit for display of. However, this technique measures the cross-sectional direction of the pipeline through the 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. However, 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.

In addition, Korean Patent Laid-Open Publication No. 10-2006-0063791 of FIG. 2 has a main mechanism device for rotatably arranging one or a plurality of ultrasonic transducer support devices in the vicinity of a pipe to enable ultrasonic defect inspection. A transducer installation arranged near the pipe and configured to install the transducer in close proximity to the pipe and the transducer installation to interlock with and interfer with the obstruction of the pipe to relative device movement when the device is moved relative to the pipe. And a guide surface configured in connection with.

This technique also comprises a plurality of ultrasonic transducers in the support device and configured to check for defects as the support device moves along the pipe. Therefore, like the above-described technology, the measurement time over a predetermined period is long, and the configuration of the moving means is complicated, and there is a problem that it is impossible to use in an environment where the pipeline is not exposed.

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, which mechanically rotates a plurality of ultrasonic transceivers and centers the pipes. The pipe non-destructive inspection device, which is configured to pass through, is the main point. This technology is not only mechanically moving a plurality of ultrasonic transceivers, but also is configured to perform the existing non-destructive inspection judgment technology by neural processing, the system is complicated and the mechanical transfer device is essential, there is still inconvenience in accordance with this .

As described above, 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. Since it is configured to inspect, it is necessary to measure the cross-sectional direction of the pipeline through the mechanical means for transporting the ultrasonic transducer when the pipeline is completely exposed, and the measurement time over a certain section is long, and the composition of the transportation means is complicated. There is this.

An object of the present invention is to provide an apparatus and a method for inspecting a magnetic pipe line for inspecting a pipe section using a magnetostrictive effect on the magnetic pipe line.

Another object of the present invention is to provide an apparatus and a method for inspecting a magnetic pipe line for inspecting at least one portion of a magnetic pipe line at a time.

Another object of the present invention is to provide an apparatus and a method for inspecting a magnetic pipe line for inspecting the presence of an abnormality of a certain section of the magnetic pipe line without a mechanical conveying means.

In addition, the present invention is a magnetic material for inspecting the presence or absence of abnormality for a certain section by exclusion only the female coil and the receiver using a magnetostrictive effect on the magnetic pipe line that is buried or not exposed It is an object of the present invention to provide an apparatus for inspecting a pipe section and a method thereof.

In another aspect, the present invention is to solve the problem to provide a device and method for inspecting the magnetic pipe pipe section that provides a more accurate inspection results by calculating and determining the abnormality of a certain section with respect to the magnetic pipe pipe by digital signal. .

In another aspect, the present invention is to solve the problem to provide a device and method for inspecting the magnetic pipe section of the pipe section to display the damage situation and the dimensions of the damage indicating the pipe crack, and to enlarge and display the damage location.

In addition, the present invention, when the transmission to the central server through the communication network with the serial number of each pipe having a damage site, the inspection apparatus and method of the magnetic pipe pipe section for centrally managing information about each pipe managed by the central server To provide a task to solve.

In order to solve the above problems, the present invention is a pipe 300 consisting of a magnetic material; and the magnetostrictive phenomenon to the pipe to cause longitudinal vibration and to set the unit to replace the pipe when an abnormality of the pipe is found Coil coil 200; A sine wave oscillator 100 for supplying a current for generating a magnetic field to the excitation coil 200; A switch 710 provided to selectively connect or block the sine wave oscillator 100 and the excitation coil 200; A microprocessor (700) for controlling the switch (710) to take an absolute value with respect to the input signal data, integrate the input waveform data over a predetermined period, and calculate an average value; Receiving converter 400 for picking up the vibration propagated to the pipe 300 is converted to an electrical signal at the break of the pipe 300 is located at a predetermined distance from one end of the excitation coil 200;

A reception amplifier 500 for amplifying an electrical signal from the reception converter 400;

An A / D converter 600 for converting an analog signal from the receiving amplifier 500 into digital data is provided, and receives data from the A / D converter 600 and is calculated by the microprocessor 700. A test output 800 terminal for analyzing a data value and outputting an abnormality state of the pipe 300; The microprocessor 700 transmits the received waveform data to the imaging module 900 over time, and the imaging module 900 acquires the received waveform data in units of time. Thereafter, the received waveform data in the unit of time obtained is cut in a predetermined unit, the distortion of the cut received waveform data is corrected, the corrected received waveform data is bonded to the plan view, and the planarized received waveform data is Overlapping and displayed on the plan view of the pre-stored pipe image, indicating the damage situation and the dimensions of the damage indicating the pipe crack 310, and enlarges the damage location.

Here, the imaging module 900 generates the analysis data quantitatively analyzing the number of the damage sites, and transmits the analysis data to the central server through the communication network with the serial number of each pipe having the damage sites. It features.

In this case, the central server centrally manages information on each of the pipes to be managed and provides an external manager terminal with a replacement time and a replacement location for a pipe having a damage situation indicating the pipe crack 310.

In addition, the present invention provides a method for inspecting a magnetic pipe pipe section; Starting inspection of the magnetic pipe section; An oscillator driving step of turning on the sine wave oscillator 100 after the inspection start step S100; Following the oscillator driving step (S110), the microprocessor 700 performs electrical signals from the receiver transducer 400 located at the other end of the pipe 300 and the receiver transducer 400 amplified by the receiver amplifier 500. A / D conversion and data input step (S120) of converting the A / D into a storage device (not shown) inside the microprocessor 700; Repeating the A / D conversion until the number of samples becomes m (S130); 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 and selects n number of data from the data that is equal to or higher than the noise level. A microprocessor calculation step (S140) of taking an absolute value, reading, summing, integrating, and calculating the average value as a calculated value y; A comparison determination step (S150) of comparing the calculated value y with a reference value yref value measured or set in a steady state after the microprocessor operation step S140; If the calculated value y in the comparison determination step (S150) is smaller than the measured or set reference value yref value in the normal state, there is a factor in the vibration reduction such as cracks in the pipe 300, so that the pipe 300 Determining an abnormal state and outputting the abnormal output to the test output 800 (S160); In the comparison determination step (S150), if the calculated value y is not smaller than the measured value or the set reference value yref value in the normal state, it is determined that the pipe 300 is in the normal state and outputs to the test output 800. (S170); An oscillator OFF step (S180) of turning off the sinusoidal oscillator 100 which is in an ON state in the oscillator driving step (S110) following the abnormal determination step (S160) or the normal determination step (S170); The imaging module 900 acquires the electrical signal amplified by the receiving amplifier 500 in units of time, and then cuts the received waveform in units of time, and corrects the distortion of the cut received waveform. Bonding the corrected received waveform to a plan view cotton (S200); Displaying the planarized received waveform on the planar surface of the pre-stored pipe image overlapping, displaying the damage situation and the dimensions of the damage indicating the pipe crack 310, and enlarges the damage position (S210) ); Characterized in that consisting of.

Here, after the step (S210), generating the analysis data quantitatively analyzing the number of the damage site, and transmitting the analysis data to the central server through the communication network with the serial number of each pipe having the damage site (S220); And centrally managing, by the central server, information on each of the pipes to be managed, and providing a replacement time and a replacement location for a pipe having a damage situation indicating the pipe crack 310 to an external manager terminal (S230). ); Characterized in further performing.

In the step of repeating the A / D conversion (S130) the number of samples m is; cp is the sound velocity of the pipe 300 material, lm is the distance from the excitation coil 200 to the receiving converter 400, ts is the time to A / D conversion of one sample, cp / (lm * ts) It is characterized in that it is set to be larger than the number of samples calculated as.

N data for taking an absolute value in the microprocessor operation (S140), adding, integrating, and calculating an average value and calculating the calculated value y; Characterized in that the n number of data from the data to the noise level or more,

In the microprocessor calculation step (S140), n data that take an absolute value, add, ie, integrate, calculate an average value, and calculate the calculated value y have vibration waveforms generated from the excitation coil 200 at least one wavelength or more. It is characterized by the included.

The present invention described above has the following effects.

First, according to the present invention, by inspecting the pipe section using the magnetostrictive effect on the magnetic pipe pipe by the excitation coil to configure the function of the existing transmission converter, such as the system has an effect that the system is simplified.

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

Third, the present invention has a technical effect that can be inspected in a short time whether there is an abnormality for a certain section of the magnetic pipe pipe without mechanical transport means.

Fourth, the present invention can inspect the presence or absence of abnormality in a certain section by disposing only a female coil and a receiver using a magnetostrictive effect on a buried or unexposed magnetic pipeline pipe at the beginning and the end of a certain section. This has the effect of providing convenience.

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 magnetic pipe 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 location.

Seventh, the present invention has the effect of centrally managing the information on 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 has an effect of conveniently performing management by providing a replacement time and a replacement position for a pipe having a damage situation to an external manager terminal.

1 is an example of a crack position detection apparatus of a conventional pipe

2 is an example of a conventional ultrasonic defect inspection

3 is an example of a non-destructive test for pipes in conventional manufacture or in a finished state.

4 is a schematic diagram of a high frequency vibration using magnetostriction of the present invention

5 is a high frequency vibration transmission by the crack of the present invention

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

7 is a test waveform of the magnetic pipe pipe section according to an embodiment of the present invention

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

9 is a flowchart illustrating a method of inspecting a magnetic pipe line section according to another embodiment of the present invention.

The present invention for achieving the above object is a pipe consisting of a magnetic material; and the excitation coil to cause a magnetostrictive phenomenon in the pipe to cause longitudinal vibration; A sine wave oscillator for supplying a current for generating a magnetic field to the excitation coil; A switch provided to selectively connect or block the sinusoidal oscillator and the excitation coil; and a microprocessor for controlling the switch; And a receiving converter for picking up the vibration propagated to the pipe and converting the electrical signal from the receiving converter to the other end of the pipe away from one end of the excitation coil. An A / D converter for converting an analog signal from the receiving amplifier into digital data; and a test output terminal for receiving data from the A / D converter and processing the same by the microprocessor to output an abnormality state of the pipe. It provides an inspection apparatus of the magnetic pipe pipe section using the magnetostrictive phenomenon, characterized in that consisting of.

In addition, the present invention is an inspection method using the inspection device of the magnetic pipe pipe section using the magnetostrictive phenomenon,

Starting inspection of the magnetic pipe section; An oscillator driving step of turning on the sine wave oscillator after the inspection start step; Following the oscillator driving step, the microprocessor A / D converts the electrical signals from the receiving transducer located at the other end of the pipe and the receiving transducer amplified by the receiving amplifier and stores them in a storage device inside the microprocessor. Conversion and data entry step; Repeating the A / D conversion until the number of samples becomes m; And when the step of repeating the A / D conversion until the number of samples becomes m is completed, the microprocessor scans the stored A / D conversion data, reads a certain number of n data from the data that is higher than or equal to the noise level, and takes an absolute value. A microprocessor calculation step of adding, that is, integrating, calculating an average value, and calculating the average value as a calculated value y; A comparison determination step of comparing the calculated value with a reference value measured or set in a steady state after the microprocessor operation step; When the calculated value is measured in the normal state or is small with respect to the set reference value in the comparison and determining step, there is a factor in damping vibration, such as a crack, in the pipe, and it is determined that the pipe is in an abnormal state and output to the test output. Abnormality determination step; A normal determination step of determining that the pipe is in a normal state and outputting it as a test output when the calculated value in the comparison determination step is not smaller than the measured reference value or the set reference value; An oscillator OFF step of turning off a sine wave oscillator which is in an ON state in the oscillator driving step following the abnormality determination step or the normal determination step; It provides a method for the inspection of the magnetic pipe pipe section using the magnetostrictive phenomenon characterized in that consisting of.

Hereinafter, preferred 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 different drawings to have the same reference numerals as possible, it is known that it may unnecessarily obscure the subject matter of the present invention Detailed description of functions and configurations will be omitted.

4 is a schematic diagram of a high frequency vibration using magnetostriction of the present invention. In general, magnetic materials vary in length in the direction of the magnetic field within the magnetic field. The change in the magnetic field length of the magnetic body is called a magnetostrictive effect. In the present invention, when the pipe forming the pipe is a magnetic material, it is characterized in that the magnetostrictive phenomenon is used as a means for applying vibration to the pipe pipe to determine the abnormality of the pipe pipe.

As shown in FIG. 4, when the excitation coil 200 is wound around the magnetic pipe 300 and a sine wave current is applied to the excitation coil 200, the excitation coil 200 generates a magnetic field according to the applied current. Let's do it. At this time, the magnetic body constituting the pipe 300 generates a vibration in the pipe 300 such as a sinusoidal alternating current applied by causing a magnetostrictive phenomenon in accordance with the change of the magnetic field. Since the sinusoidal alternating current vibration generated in the pipe 300 is due to the change in the length of the pipe 300 according to the change in the magnetic field, it is transmitted to the longitudinal wave in the pipe 300. Therefore, when the vibration is generated in the magnetic pipe 300 using the magnetostriction as in the present invention, a pure longitudinal wave component is generated in the magnetic pipe 300.

Figure 5 illustrates the transmission of high frequency vibrations by the crack of the present invention. As described above, when the magnetic wave phenomenon is used to generate vibration of pure longitudinal wave components in the magnetic pipe 300, the vibration of the longitudinal wave is transmitted along the 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 body constituting the pipe 300 may be a sound such as liquid or gas. Since it is larger than the impedance, most of the vibration is 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.

At this time, if there is a crack in the pipe, that is, a crack, the crack 310 has an acoustic impedance different from the acoustic impedance of the metal body constituting the pipe 300, so that the excitation Part of the vibration energy generated from the coil 200 reflects and passes only a part thereof. Therefore, when the vibration generated from the excitation coil 200 is transmitted through the pipe 300 having no abnormality, the naturally attenuated vibration is transmitted as shown in FIG. 5 at a point away from the excitation coil 200 by a predetermined distance. Propagated to (a). If there is a crack 310 or the like on the transmission path of the vibration, ie, the wall of the pipe 300, the filter 310 may be located at a point away from the excitation coil 200 due to reflection by the crack 310. The vibration attenuated more than the natural attenuation vibration as shown in (b) of FIG. 5 propagates to the transmission wave b.

The present invention propagates longitudinal wave vibrations inside the pipe 300 as the excitation coil 200 with respect to the pipeline pipe made of a magnetic material using the above properties, and picks up and analyzes the vibration at a predetermined distance from the pipe. (300) It is characterized by determining the presence or absence of abnormality due to the crack (310) inside. In this case, a predetermined distance from the excitation coil 200 and the excitation coil 200 with respect to the pipe 300 is preferably set to a unit that can replace the pipe 300 when an abnormality of the pipe 300 is found. In addition, the excitation coil 200 and the receiving converter 400 to be described later may be fixedly disposed on the pipe 300.

Hereinafter, the features and configuration of the inspection device of the adult pipeline pipe section of the present invention will be described in detail with reference to FIG.

6 is a block diagram illustrating an inspection apparatus for a magnetic pipe line in accordance with an embodiment of the present invention. The inspection device of the magnetic pipe pipe section of the present invention; Sine wave oscillator 100 for supplying a current generating a magnetic field to the excitation coil 200, magnetic excitation phenomenon causing the longitudinal wave vibration in the pipe 300 consisting of a magnetic material, the excitation coil 200, the sine wave oscillator It consists of a switch 710 and a microprocessor 700 for controlling the switch 710 is provided to selectively connect or cut off the 100 and the excitation coil 200.

In addition, the other end of the pipe 300 is located at a predetermined distance from one end of the excitation coil 200 is located on the other end of the receiving converter 400 for picking up the vibration propagated to the pipe 300 and converting it into an electrical signal and the receiving A reception amplifier 500 for amplifying an electrical signal from the converter 400 and an A / D converter 600 for converting an analog signal from the reception amplifier 500 into digital data are provided and the A / D converter 600 is provided. It is composed of a test output (800) terminal for outputting the presence or absence of abnormality in the pipe 300 by receiving the data from the processing by the microprocessor 700.

In addition, in the inspection device of the magnetic pipe pipe section according to an embodiment of the present invention, the receiving transducer for picking up the vibration propagated to the pipe 300 from one end of the excitation coil 200 is converted into an electrical signal ( The predetermined distance to 400 may be set to a unit that can replace the pipe 300 when an abnormality of the pipe 300 is found.

On the other hand, the imaging module 900 is connected to the microprocessor 700 in a wired manner, and the received waveform, which is the longitudinal wave vibration picked up by the receiver converter 400 through the pipe 300 of the replaceable unit in the flow of time According to the received from the microprocessor 700 and stored in the storage unit 910.

The imaging module 900 acquires the received received waveform in the time unit of the conduit, and then cuts the received waveform in the acquired time unit in a predetermined unit, corrects the distortion of the received received waveform, and corrects the corrected received waveform. Bond to the floor plan cotton.

Then, the imaging module 900 overlaps the planarized received waveform on the planar surface of the previously stored pipe image, and displays the damage situation and the dimension of the damage indicating the pipe crack 310 or the pipe erosion 320. In addition, the damage location is enlarged and displayed, and quantitative analysis of the number of damage areas is generated.

The imaging module 900 transmits 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 pipes to be managed, and provides replacement timing and replacement locations for troubled pipes to external manager terminals.

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

FIG. 7 illustrates a test waveform of a magnetic pipeline pipe section according to an exemplary 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 the microprocessor 700. FIG. 7A illustrates A / D of electrical signals from the receiving transducer 400 positioned at the other end of the pipe 300 in the normal state and the receiving transducer 400 amplified by the receiving amplifier 500. An example of a waveform that is converted to converter 600 and stored in microprocessor 700 is shown. The microprocessor 700 measures the magnitude of the signal by taking an absolute value with respect to the input signal data as shown in FIG. In FIG. 7, the waveform is shown based on the maximum value of the waveform. Preferably, it is preferable to integrate the waveform data input over a predetermined period, calculate an average value, and use the value as a reference value for more accurate determination.

FIG. 7C illustrates another waveform for determining whether the pipe 300 is abnormal by receiving data from the A / D converter 600 of FIG. 6 and analyzing the data by the microprocessor 700. As shown in Fig. 2, the pipe crack 310 is present inside the pipe 300 and the amplified by the receiving converter 400 and the receiving amplifier 500 located at the other end of the pipe 300. The measurement of waveforms stored in the microprocessor 700 by converting the electrical signal from the receiver converter 400 to the A / D converter 600 is attenuated compared to the reference value in the normal state. Although the maximum value of the received waveform is shown as a measured value in FIG. 7, it is preferable to integrate the input waveform data over a predetermined period, calculate an average value, and use this value as a measured value for more accurate determination. Therefore, the fixed inspection device of the magnetic pipe line section of FIG. 6 takes the absolute value of the waveform data input over a certain interval, integrates the average value, calculates the average value, and compares the average value with the reference value in a steady state. It can be determined.

In the above-described abnormality determination, the microprocessor 700 takes an absolute value with respect to the input signal data, integrates the input waveform data over a predetermined period, calculates an average value, and compares the value with a reference value. It is characterized in that the output of the abnormality of the pipe 300 to the output terminal 800.

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

FIG. 8 is a method for inspecting a magnetic conduit pipe section for receiving and analyzing data from the A / D converter 600 by the microprocessor 700 in the apparatus for inspecting a magnetic conduit pipe section shown in FIG. 6 of the present invention. Shows the flow chart. When the inspection method of the magnetic pipe line section starts (S100), the microprocessor 700 performs the oscillator driving step (S110) to turn on the sinusoidal oscillator 100 of FIG. Following the oscillator driving step (S110), the microprocessor 700 performs electrical signals from the receiver transducer 400 located at the other end of the pipe 300 and the receiver transducer 400 amplified by the receiver amplifier 500. A / D conversion and data input step (S120) for storing the A / D conversion in a storage device (not shown) inside the microprocessor 700, and performing the A / D conversion and data input step (S120). ) Is continued until the number of input samples becomes a predetermined number m. In this case, the number m of samples input is the number of samples that can be A / D converted during the time taken by the receiving transducer 400 to pick up the vibration generated from the excitation coil 200 and propagated to the pipe 300. It is set as a standard.

In other words, when the sound velocity of the pipe 300 material is cp / sec, when the distance from the excitation coil 200 to be measured to the receiving converter 400 is lm, the vibration generated from the excitation coil 200 is measured. The propagation time is cp / lm [sec]. On the other hand, if the time for A / D conversion of one sample is ts, the number m of samples required for receiving the vibration generated from the excitation coil 200 at the receiving converter 400 and performing all A / D conversion is cp / ( lm * ts).

An example will be described to more clearly specify the sample number. 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 excitation coil 200 to the receiving converter 400 is 11.6 [m], the transmission time of the vibration generated from the excitation coil 200 is 2 [msec], and one sample is A / When the time of D conversion is 10 [µsec], the number m of samples required for A / D conversion of all the received waveforms is 200. Therefore, in the above example, it can be designed to continue until the number of input samples in the A / D conversion and data input step (S120) is 200.

The number m of the samples described above is the minimum number of samples necessary for receiving the vibration generated from the excitation coil 200 in the receiving converter 400 and performing all A / D conversions. It is preferable to set the appropriate number m of samples so as to be larger than the number of samples calculated by lm * ts).

Therefore, in the present invention, the number of samples m repeating the A / D conversion is m; cp is the sound velocity of the pipe 300 material, lm is the distance from the excitation coil 200 to the receiving converter 400, ts is the time to A / D conversion of one sample, cp / (lm * ts) It is characterized in that it is set to be larger than the number of samples calculated as.

When the number of samples input in the A / D conversion and data input step (S120) reaches a predetermined number m, the internal memory device of the microprocessor 700 receives a reception converter from the time when vibration is generated from the excitation coil 200. A / D conversion data until all vibrations are received at 400 is stored.

* After the step of repeating the A / D conversion until the number of samples is m (S130) is completed, the microprocessor 700 scans the stored A / D conversion data and the data n number of data from the noise level or more to a certain number A microprocessor calculation step (S140) is performed in which an absolute value is read, summed, integrated, integrated, and calculated as an average value. In this case, the n pieces of data are set such that the vibration waveform generated from the excitation coil 200 includes at least one wavelength or more.

Therefore, the n pieces of data required in the operation of the microprocessor (S140) of the present invention are n number of data starting from the data which is equal to or higher than the noise level, and the vibration waveform generated from the excitation coil 200 includes at least one wavelength or more. It features.

After the microprocessor operation S140, a comparison determination step S150 is performed in which the calculated value y is compared with a reference value yref value measured or set in a steady state. At this time, when the calculated value y is measured in the normal state or is small with respect to the set reference value yref, there is a factor in damping the vibration, such as a crack, in the pipe 300, and it is determined that the pipe 300 is in an abnormal state. After the abnormality determination step (S160) of outputting to the test output 800, if the calculated value y is measured in the normal state or is not small with respect to the set reference value yref value, it is determined that the pipe 300 is in the normal state and tested A normal determination step S170 of outputting to the output 800 is performed. The magnetic body of the present invention by performing the oscillator OFF step (S180) to turn off the sinusoidal oscillator 100 in the ON state in the oscillator driving step (S110) following the abnormal determination step (S160) or the normal determination step (S170). The inspection method of the pipeline pipe section is completed.

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

After step S130 or after step S190, the imaging module 900 time-receives the received waveform, which is an electrical signal from the receive converter 400 amplified by the receive amplifier 500 from the microprocessor 700. After the acquisition in units of time, the received waveform of the acquired unit of time is cut in a predetermined unit, the distortion of the cut reception wave is corrected, and the corrected reception waveform is bonded by plan view cotton (S200).

After operation S200, the imaging module 900 overlaps the planarized reception waveform on the planar surface of the pipe image pre-stored in the storage unit 910 and displays the pipe crack 310 or the pipe erosion described with reference to FIG. 8. The damage situation and the dimensions of the damage indicated by 320 are displayed, and the damage position is enlarged and displayed (S210).

After step S210, the imaging module 900 generates analytical data quantitatively analyzing the number of damaged parts, and transmits the analyzed data to the central server through the communication network together with the serial number of each pipe having the damaged parts. (S220).

The central server centrally manages information on each of the pipes to be managed, and provides the external manager terminal with a replacement time and a replacement location for a pipe having a damage situation indicating a pipe crack 310 or a pipe erosion 320 ( S230).

Accordingly, the manager terminal holder can manage each pipe with reference to the replacement time and replacement location.

As described above, the inspection apparatus and the method of the magnetic pipe pipe section using the magnetostriction of the present invention generates a vibration using the magnetostriction from the pipe 300 and the excitation coil 200 installed in the pipe 300, By receiving the vibration by the receiving transducer 400 and calculating and comparing the waveforms with the microprocessor 700, it is possible to simply determine whether there is an abnormality in the magnetic pipe line, and if necessary, a device for inspecting the magnetic pipe line. Various design changes are possible according to the needs of those skilled in the art, such as fixed installation on the inspection object and remote inspection through additional communication means to the microprocessor.

Although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains, and claims to be described below. Of course, various modifications and variations are possible within the scope of equivalents.

Claims (8)

1. Pipe 300 composed of a magnetic material; and the excitation coil 200 causes a longitudinal wave vibration to the pipe and the excitation coil 200 to set the unit to replace the pipe when an abnormality of the pipe is found;

   A sine wave oscillator 100 for supplying a current for generating a magnetic field to the excitation coil 200;

   A switch 710 provided to selectively connect or block the sine wave oscillator 100 and the excitation coil 200;

   A microprocessor (700) controlling the switch (710) to take an absolute value with respect to the input signal data, integrate the input waveform data over a predetermined period, and calculate an average value;

   Receiving converter 400 for picking up the vibration propagated to the pipe 300 is converted to an electrical signal at the break of the pipe 300 is located at a predetermined distance from one end of the excitation coil 200;

   A reception amplifier 500 for amplifying an electrical signal from the reception converter 400;

   An A / D converter 600 for converting an analog signal from the receiving amplifier 500 into digital data is provided, and receives the data from the A / D converter 600 and is calculated by the microprocessor 700. A test output 800 terminal for analyzing a data value and outputting an abnormality state of the pipe 300; Consists of,

   When the microprocessor 700 transmits the received waveform data to the imaging module 900 over time,

   The imaging module 900, after acquiring the received waveform data in units of time, cuts the received waveform data in units of time acquired by a predetermined unit, corrects distortion of the received received waveform data, and corrects the received. Bonded the waveform data with a plan view

   The planarized received waveform data is displayed by overlapping the planar surface 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. Inspection device of the magnetic pipe pipe section using the magnetostrictive phenomenon characterized in that the display.
2. The method of claim 1, wherein the imaging module 900,

   Generating analytical data quantitatively analyzing the number of the damaged parts, and the magnetic pipe line using magnetic distortion phenomenon characterized in that for transmitting the analysis data to the central server through the communication network with the serial number of each pipe having the damaged site Inspection device of section.
3. The method of claim 2, wherein the central server,

   Centrally manage information about each managed pipe,

   Apparatus for inspecting the magnetic pipe pipe section using the magnetostrictive phenomenon, characterized in that 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 the external manager terminal.
4. In the method of inspecting the magnetic pipe pipe section;

   Starting inspection of the magnetic pipe section;

   An oscillator driving step of turning on the sine wave oscillator 100 after the inspection start step S100;

   Following the oscillator driving step (S110), the microprocessor 700 performs electrical signals from the receiver transducer 400 located at the other end of the pipe 300 and the receiver transducer 400 amplified by the receiver amplifier 500. An A / D conversion and data input step (S120) of storing the A / D conversion in a memory (not shown) inside the microprocessor 700;

   Repeating the A / D conversion until the number of samples becomes m (S130);

   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 and selects n number of data from the data that is equal to or higher than the noise level. A microprocessor calculation step S140 of reading and taking an absolute value, adding, ie, integrating, calculating an average value, and calculating the calculated value y;

   A comparison determination step (S150) of comparing the calculated value y with a reference value yref value measured or set in a steady state after the microprocessor operation step S140;

   If the calculated value y in the comparison determination step (S150) is smaller than the measured or set reference value yref value in the normal state, there is a factor in the vibration reduction such as cracks in the pipe 300, so that the pipe 300 Determining an abnormal state and outputting the abnormal output to the test output 800 (S160);

   In the comparison determination step (S150), if the calculated value y is not smaller than the measured value or the set reference value yref value in the normal state, it is determined that the pipe 300 is in the normal state and outputs to the test output 800. (S170);

   An oscillator OFF step (S180) of turning off the sinusoidal oscillator 100 which is in an ON state in the oscillator driving step (S110) following the abnormal determination step (S160) or the normal determination step (S170);

   The imaging module 900 acquires the electrical signal amplified by the receiving amplifier 500 in units of time, and then cuts the received waveform in units of time, and corrects the distortion of the cut received waveform. Bonding the corrected received waveform to a plan view cotton (S200);

   Displaying the planarized received waveform on the planar surface of the pre-stored pipe image overlapping, displaying the damage situation and the dimensions of the damage indicating the pipe crack 310, and enlarges the damage position (S210) ); Method of inspection of the magnetic pipe pipe section using the magnetostriction, characterized in that consisting of.
5. According to claim 4, After the step (S210),

   Generating analysis data quantitatively analyzing the number of damaged parts and transmitting the analyzed data to a central server through a communication network together with the serial number of each pipe having the damaged parts (S220); And

   The central server centrally manages information on each of the pipes to be managed, and replaces the replacement timing and the replacement location of the pipes having a damage situation indicating the pipe crack 310 or the pipe erosion 320 with an external manager terminal. Providing step (S230); Method of inspection of the magnetic pipe pipe section using the magnetostriction, characterized in that further performing.
6. The method according to claim 4,

   In the step of repeating the A / D conversion (S130) the number of samples m is;

   When cp is the sound velocity of the pipe 300 material, lm is the distance from the excitation coil 200 to the receiving converter 400, ts is the time to A / D conversion of one sample,

   A method for inspecting a magnetic conduit pipe section using magnetostriction, characterized in that it is set to be larger than the number of samples calculated as cp / (lm * ts).
7. The method according to claim 4,

   N data for taking an absolute value in the microprocessor operation (S140), adding, integrating, and calculating an average value and calculating the average value as y;

   A method for inspecting a magnetic pipe line section using magnetostrictive phenomenon, characterized in that the data is equal to or greater than the noise level and has a certain number of pieces of data.
8. The method according to claim 4,

   In the microprocessor calculation step (S140), n data that take an absolute value, add, ie, integrate, calculate an average value, and calculate the calculated value y have vibration waveforms generated from the excitation coil 200 at least one wavelength or more. Method of inspection of the magnetic pipe pipe section using a magnetostrictive phenomenon characterized in that it comprises.

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