KR101474950B1 - Apparatus for monitoring stress of pipe and system thereof - Google Patents

Apparatus for monitoring stress of pipe and system thereof Download PDF

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Publication number
KR101474950B1
KR101474950B1 KR20130138953A KR20130138953A KR101474950B1 KR 101474950 B1 KR101474950 B1 KR 101474950B1 KR 20130138953 A KR20130138953 A KR 20130138953A KR 20130138953 A KR20130138953 A KR 20130138953A KR 101474950 B1 KR101474950 B1 KR 101474950B1
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KR
South Korea
Prior art keywords
pipe
clamp
sensor
stress
unit
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KR20130138953A
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Korean (ko)
Inventor
조영준
Original Assignee
삼성중공업 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Pipeline Systems (AREA)

Abstract

A stress monitoring apparatus and system for a pipe are provided. An apparatus for monitoring a stress of a pipe according to an embodiment of the present invention includes: a first sensor unit installed on a pipe; A second sensor unit installed in a clamp for restraining the pipe; And a data obtaining unit obtaining a relative displacement between the first and second sensor units.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a stress monitoring apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a system for monitoring a stress of a pipe, and more particularly to a system and a system for monitoring stress of a pipe for calculating and monitoring stress of the pipe based on relative displacements of sensors installed respectively in the pipe and the clamp .

To measure the displacement of the pipe, a strain gauge is attached to the pipe to sense the displacement of the pipe.

1A and 1B are a cross-sectional view and a perspective view, respectively, showing a strain gauge installed in a conventional pipe.

Referring to Figs. 1A and 1B, a strain gauge 3 is directly attached to the outside of the pipe 1 to measure the displacement of the pipe 1. Fig. However, since the strain gauge 3 is mounted only on the pipe 1, only the displacement of the pipe itself due to the tension of the pipe 1 is obtained, and accurate data collection may be difficult. In addition, the strain gauge 3 is attached to the outside of the pipe 1, and the strain gauge 3 is exposed, and there is a high possibility of damage.

US Open Patent No. 2012-0024052 (2012.02.02. Open)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pipe stress monitoring apparatus and system capable of measuring a stress of a pipe by measuring a relative displacement between a pipe and a clamp.

Also, there is provided a pipe stress monitoring apparatus and system capable of evaluating the stress of a pipe at a high speed by collecting data easily by measuring a relative displacement between the pipe and the clamp using a clamp used for pipe fixing will be.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an apparatus for monitoring a stress of a pipe, comprising: a first sensor unit installed on a pipe; A second sensor unit installed in a clamp for restraining the pipe; And a data obtaining unit obtaining a relative displacement between the first and second sensor units.

The stress monitoring apparatus of the pipe may further include a calculating unit that calculates a stress of a pipe applied to the pipe from a relative displacement obtained by the data obtaining unit.

The stress monitoring apparatus of the pipe may further include a display unit for displaying the stress of the pipe calculated by the calculating unit.

The apparatus for monitoring a stress of the pipe may further include an alarm unit for providing an alarm signal for warning when the stress of the pipe calculated by the calculation unit is out of a preset safe range.

According to another aspect of the present invention, there is provided a stress monitoring system for a pipe for monitoring a stress of a pipe fixed by a clamp, the system comprising: a clamp sensor installed at the clamp; A pipe sensor installed on the pipe, a clamp sensor installed on the clamp is fixed, and a pipe sensor installed on the pipe moves in accordance with the movement of the pipe, so that, based on the relative displacement between the clamp sensor and the pipe sensor, And the stress of the subject is monitored and monitored.

The clamp may be installed at predetermined intervals in the pipe to fix the pipe.

At least one or more clamp sensors may be provided for each clamp.

The pipe sensor may be installed in a one-to-one correspondence with the clamp sensor.

The clamp sensor may be installed in the inner groove of the clamp.

The pipe sensor may be installed in an insulating layer of the pipe.

The stress monitoring system of the pipe includes an interface module for obtaining the relative displacement, a processor for calculating a stress of the pipe based on the relative displacement, and a display module for displaying a stress of the calculated pipe, .

Other specific details of the invention are included in the detailed description and drawings.

According to the present invention, relative displacement can be obtained between the sensor installed in the clamp and the sensor installed in the pipe to monitor the stress of the pipe.

Further, by providing a sensor in a clamp used for fixing the pipe, data can be easily acquired.

Further, since the sensor is installed in the groove of the clamp and the insulation layer of the pipe, the sensor is protected from external damage and the maintenance of the sensor can be simplified.

1A and 1B are a cross-sectional view and a perspective view respectively showing strain gauges installed in a conventional pipe.
2 is a block diagram showing a concept of a stress monitoring apparatus for a pipe according to an embodiment of the present invention.
FIGS. 3A and 3B are views showing torsional displacement measured by the stress monitoring apparatus of the pipe of FIG. 2. FIG.
4A and 4B are views showing lateral displacement measured by the stress monitoring apparatus of the pipe of FIG.
FIGS. 5A and 5B are diagrams showing axial displacement measured by the stress monitoring apparatus of FIG. 2; FIG.
6 is a block diagram showing a concept of a stress monitoring system for a pipe according to an embodiment of the present invention.
Fig. 7 is a diagram showing the arrangement relationship of pipes and clamps measured by the stress monitoring system of the pipe of Fig. 6; Fig.
FIG. 8 is a diagram showing the arrangement relationship of sensors installed in a pipe in the stress monitoring system of the pipe of FIG. 6; FIG.
9 is a block diagram of a microcomputer in the stress monitoring system of the pipe of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a block diagram showing a concept of a stress monitoring apparatus for a pipe according to an embodiment of the present invention.

Referring to FIG. 2, an apparatus for monitoring a stress of a pipe according to an embodiment of the present invention includes a first sensor unit 110 installed on a pipe, a clamp 20 restricting the pipe 10, And a data acquisition unit 130 for acquiring a relative displacement between the first sensor unit 110 and the second sensor unit 120. [ The apparatus for monitoring a stress of a pipe according to an embodiment of the present invention includes a calculating unit 130 that calculates a stress of the pipe 10 applied to the pipe 10 from a relative displacement obtained by the data obtaining unit 130, A display section 150 for displaying the stress of the pipe 10 calculated by the calculating section 140 and a stress calculating section 140 for calculating a stress of the pipe 10 calculated by the calculating section 140, And an alarm unit 160 for providing an alarm signal to warn the user.

The pipe 10 is fastened with the clamp 20 to restrain the whole of the pipe 10 in a predetermined direction. The clamp 20 is in a fixed position, but the pipe 10 can move in position even if it is constrained by the clamp 20.

Thus, when the pipe 10 and the clamp 20 are respectively mounted with sensors, the relative displacement between the pipe 10 and the clamp 20 due to the movement of the pipe 10 can be accurately measured by the data acquiring unit 130 . In the case of the clamp 20, the position of each sensor can be provided by grooving the inside of the clamp 20, and in the case of the pipe 10, between the pipe body and the insulation, .

The relative displacement obtained in the data acquisition unit 130 is basic data for calculating the stress of the pipe 10, and the calculation unit 140 performs the relative displacement. The relative displacement refers to the displacement of the pipe 10 and the clamp 20, but since the clamp 20 is at the fixed position, the relative displacement is the displacement of the pipe 10. This will be described in detail later.

The stress of the pipe 10 obtained in the calculating unit 140 is displayed in real time on the display unit 150. The stress of the pipe 10 is displayed in real time on the display unit 150. Especially when the stress of the pipe 10 is out of a predetermined range, An alarm signal can be given to alert the user.

FIGS. 3A and 3B are views showing torsional displacement measured by the stress monitoring apparatus of the pipe of FIG. 2. FIG. 4A and 4B are views showing a lateral displacement measured by the stress monitoring apparatus of the pipe of FIG. 5A and 5B are views showing an axial displacement measured by the stress monitoring apparatus of the pipe of FIG. 2. FIG.

3A and 3B, it can be seen that the first sensor unit 110 is twisted by an angle? Due to the force of the pipe 10 in the rotating direction. The greater the stress on the rotating direction of the pipe 10, the greater the angle?.

4A and 4B, it can be seen that the first sensor unit 110 is moved by a distance A from the second sensor unit 120 by receiving a force in the transverse direction perpendicular to the pipe axis . As the stress is applied in the direction perpendicular to the axis of the pipe 10, the moving distance A becomes larger.

Referring to FIGS. 5A and 5B, it can be seen that the first sensor unit 110 is moved by a distance C from the second sensor unit 120 by the force of the pipe 10 in the axial direction parallel to the pipe axis . The more the stress is applied in the axial direction parallel to the axis of the pipe 10, the larger the moving distance C becomes.

The calculation unit 140 can calculate the torque applied to the pipe 10 from the angle a and can recognize the forces applied in the vertical and horizontal directions of the pipe 10 from the movement distances A and C Therefore, the stress of the pipe 10, which is a stress acting per unit area, can be obtained by using this.

Therefore, by using the clamp 20 used for fixing the pipe 10 through the apparatus for monitoring the stress of the pipe according to the embodiment of the present invention, data collection can be made easier and the existing strain gauge can be directly bonded Since the sensor is protected by the insulation of the pipe and the clamp 20 by measuring the relative displacement between the clamp 20 and the pipe 10, Less maintenance and easier to maintain.

6 is a block diagram showing a concept of a stress monitoring system for a pipe according to an embodiment of the present invention. Fig. 7 is a diagram showing the arrangement relationship of pipes and clamps measured by the stress monitoring system of the pipe of Fig. 6; Fig. FIG. 8 is a diagram showing the arrangement relationship of the sensors installed on the pipe in the stress monitoring system of the pipe of FIG. 9 is a block diagram of a microcomputer in the stress monitoring system of the pipe of FIG.

Referring to FIG. 6, a stress monitoring system for a pipe according to an embodiment of the present invention is a stress monitoring system for a pipe that monitors the stress of a pipe 10 fixed by a clamp 20, A clamp sensor 220 is installed on the pipe 10 and a pipe sensor 10 is installed on the pipe 10. The clamp sensor 220 installed on the clamp 20 is fixed and a pipe sensor 210 are moved according to the movement of the pipe 10 so that the stress of the pipe 10 is calculated and monitored based on the relative displacement between the clamp sensor 220 and the pipe sensor 210 .

At this time, as shown in FIG. 7, the clamp 20 is installed at a predetermined interval in the pipe 10 to fix the pipe 10. Therefore, if the clamps 20 are regarded as one section, the stress of the pipe 10 can be calculated and monitored for each section.

At least one clamp sensor 220 may be provided for each clamp 20, and the pipe sensor 110 may be installed in a one-to-one correspondence with the clamp sensor 220. Since a plurality of clamps 20 are provided on the pipe 10 at predetermined intervals, the clamp sensor 220 must be provided for each clamp 20. It is advantageous that a plurality of clamp sensors 220 are provided for each clamp 20 in order to accurately measure the relative displacement between the clamp 20 and the pipe 10, The sensor 210 must be installed.

In order to protect the clamp sensor 220, it is preferable that the clamp 20 digs a groove (not shown) inwardly of the pipe 10 and mounts the clamp sensor 220 in the groove. 8, it is preferable to be provided on the insulating layer 15 of the pipe 10 in order to protect the pipe sensor 210. [

The clamp sensor 220 installed on the clamp 20 is fixed and the pipe sensor 210 installed on the pipe 10 moves in accordance with the movement of the pipe 10 so that the clamp sensor 220 and the pipe The relative displacement between the sensors 210 is obtained, and the relative displacement thus obtained can be calculated and monitored through the microcomputer 300.

9, the microcomputer 300 may include an interface module 310, a processor 320, a display module 330, a speaker 340, and the like.

The interface module 310 acquires and transmits the relative displacement between the clamp sensor 220 and the pipe sensor 210 to the processor 320. The processor 320 calculates the stress of the pipe 10 based on the relative displacement. The stress of the pipe 10 calculated by the processor 320 may be displayed on the display module 330 and displayed or may be provided to the system manager or the like through the speaker 340.

Therefore, by installing the sensors 210 and 220 in the clamp 20 and the pipe 10, respectively, through the stress monitoring system of the pipe according to the embodiment of the present invention, the displacement of the pipe 10 can be detected with the clamp 20 By measuring the relative displacement, the data can be collected more easily, and the sensors 210 and 220 can be protected by the insulating layer of the clamp 20 and the pipe 10 to prevent breakage.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: Pipe 20: Clamp
110: first sensor unit 120: second sensor unit
130: Data acquisition unit 140:
150: display unit 160: alarm unit
210: Pipe sensor 220: Clamp sensor
300: Microcomputer

Claims (11)

A first sensor unit installed on the pipe;
A second sensor unit installed in a clamp for restraining the pipe; And
And a data acquisition unit for acquiring a relative displacement between the first and second sensor units. The method according to claim 1,
Further comprising: a calculating unit that calculates a stress of a pipe applied to the pipe from a relative displacement obtained by the data obtaining unit. 3. The method of claim 2,
And a display unit for displaying the stress of the pipe calculated by the calculating unit. 3. The method of claim 2,
Further comprising an alarm unit for providing an alarm signal to warn when the stress of the pipe calculated by the calculation unit is out of a preset safety range. CLAIMS 1. A stress monitoring system for a pipe which monitors the stress of a pipe held by a clamp,
A clamp sensor is installed in the clamp, a pipe sensor is installed in the pipe,
Wherein the clamp sensor installed on the clamp is fixed and the pipe sensor installed on the pipe moves according to the movement of the pipe to thereby calculate and monitor the stress of the pipe based on the relative displacement between the clamp sensor and the pipe sensor, Pipe stress monitoring system. 6. The method of claim 5,
Wherein the clamp is installed at a predetermined interval in the pipe to fix the pipe. The method according to claim 6,
Wherein the clamp sensor is installed at least one per each clamp. 8. The method of claim 7,
Wherein the pipe sensor is installed in a one-to-one correspondence with the clamp sensor. 6. The method of claim 5,
Wherein the clamp sensor is installed in an inner groove of the clamp. 6. The method of claim 5,
Wherein the pipe sensor is installed in an insulating layer of the pipe. 6. The method of claim 5,
Further comprising a microcomputer including an interface module for obtaining the relative displacement, a processor for calculating a stress of the pipe based on the relative displacement, and a display module for displaying a stress of the calculated pipe, system.
KR20130138953A 2013-11-15 2013-11-15 Apparatus for monitoring stress of pipe and system thereof KR101474950B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160090072A (en) 2015-01-21 2016-07-29 세명이엔시 (주) System for monitoring steel pipe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100573736B1 (en) 2004-02-16 2006-04-25 재단법인서울대학교산학협력재단 Transducer for Generating and Sensing Torsional Waves, and Apparatus and Method for Structural Diagnosis Using It

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100573736B1 (en) 2004-02-16 2006-04-25 재단법인서울대학교산학협력재단 Transducer for Generating and Sensing Torsional Waves, and Apparatus and Method for Structural Diagnosis Using It

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160090072A (en) 2015-01-21 2016-07-29 세명이엔시 (주) System for monitoring steel pipe

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