KR101453336B1 - Non contact displacement measurement system - Google Patents

Abstract

The present invention relates to a non-contact displacement measuring system capable of three-dimensionally real-time monitoring thermal expansion and change of a boiler, and more particularly, to a non-contact displacement measuring system, A camera module for photographing a photographing area including the reference point in real time as a moving image; a laser module for emitting a laser to a reference point indicated on the sample (boiler) at one side of the camera module, A laser distance measuring module that receives a laser reflected from the reference point and measures a displacement on a Z axis along with a distance from the reference point, the laser distance measuring module being connected to the camera module, Converted into a digital signal, and converted into a digital signal The image is divided into image frames, the color values of the divided image frames are analyzed in units of pixels, and the displacement on the X, Y, and Z axes of the reference data and the reference point is determined in real time based on the color values of the analyzed image frame An operation control unit connected to the image processing unit to calculate a tracking control signal for a reference point based on measurement data compared with reference data in the image processing unit; The camera module and the laser distance measurement module are tracked along the displaced reference point and a control signal is applied to the servo motors so that the point of sight of the camera module and the point of the laser distance measurement module coincide with the displaced reference point And an operation control unit coupled to the operation processing unit, And an output unit connected to the operation processing unit and outputting a warning signal as sound and image when data applied from the operation processing unit is applied as data out of a predetermined range set in advance, It is possible to monitor the thermal expansion and displacement / change state of the boiler three-dimensionally in real-time in a continuous and real-time manner, so that the boiler can be kept in an optimum state, and safety can be secured Of course, it provides a non-contact displacement measurement system that ensures reliability.

Description

[0001] Non-contact displacement measurement system [0002]

The present invention relates to a non-contact displacement measurement system capable of three-dimensionally real-time monitoring the thermal expansion and change state of a boiler, and more particularly, And more particularly, to a non-contact displacement measurement system for three-dimensionally monitoring the displacement state of a boiler in accordance with thermal expansion based on data produced to track and track the same.

Generally, the electric power business is a key industry in a country that consumes enormous energy, and the power plant must maintain its performance optimally for reliable operation.

Among the power generation facilities, the boiler is an important factor that determines the performance of the entire power generation facility, so such boilers should be continuously measured and monitored.

In order to monitor such combustion performance, direct flame measurement inside the boiler or monitoring of the displacement / deformation of the boiler due to thermal expansion is adopted. However, since the boiler of the electric power facility is large and operated at a very high temperature, And management.

Therefore, most of the power plants are managed by analyzing the amount of fuel and air in the boiler, the amount of unburned gas in the combustion gas, or the amount of pollutants generated.

As another method of the boiler, there is a method of monitoring the displacement / deformation state of the boiler and calibrating and managing the displacement / deformation state of the boiler.

According to this method, it is possible to correct the deformation of the boiler structure and to extend the life of the boiler by grasping the thermal distribution state of the water-cooling wall tube constituting the boiler structure.

In the method of managing the boiler by monitoring the displacement due to such thermal expansion, a mechanical measuring device is generally used. Such a measuring apparatus is, for example, one in which an indicator plate is movably provided on a scale indicated with a scale, and the degree of displacement due to thermal expansion can be measured by the movement of the indicator plate.

Such a measuring device is installed at various positions of the boiler, and then the displacement according to the thermal expansion of each part of the boiler is measured, for example, in units of day, month, etc., and the boiler is managed by analyzing it and calibrating it according to the displacement.

However, as described above, the one-dimensional thermal expansion measuring means is installed at various positions of the boiler, and the method of periodically detecting and analyzing the thermal expansion to manage the boiler can not continuously detect the displacement of the boiler. There is a problem that continuous and accurate management can not be performed.

In addition, since each of the displacement measuring devices is manually detected and recorded, there is a problem that an error of a measured value may be generated, and safety of an operator may be impaired.

According to the above-described problem, various proposals have been provided to measure the displacement of the specimen and to monitor the displacement of the specimen. As a result, in the registered patent No. 10-0655053 (2006.11.30), a pipe displacement measuring device A three-dimensional piping displacement measuring device comprising a fixed portion and a displacement detecting portion for three-dimensionally detecting a displacement amount of a pipeline supported by the fixed portion and to be measured using three displacement sensors, A rotation detecting unit for detecting a rotation angle of the pipe line by using the rotation angle sensor and transmitting a corresponding rotation angle signal to the measurement point of the rotation detecting unit, Which receives the pipe rotation angle signal detected from the pipe, calculates the pipe displacement considering the rotation, and outputs the change of the pipe displacement Provided is a three-dimensional pipe displacement measuring device that takes into account rotation including a food part.

In addition, in Japanese Patent Application No. 10-0361898, there is provided a fixing device for fixing a measuring device to a support, a displacement detector for three-dimensionally detecting a displacement amount of a pipe line supported by the fixing part, And a marking unit for receiving and outputting the detected displacement amount and providing a connection terminal for easily transmitting a signal of the displacement detection unit to the marking unit at one side of the fixing unit.

However, the conventional contact type displacement measuring instrument is disadvantageous in that it must be installed in a harsh environment during installation, and it must be operated at a high altitude.

Since the present invention can be installed in the vicinity of a boiler without directly installing or installing the boiler, it is possible to monitor the thermal expansion and displacement / change state of the boiler three-dimensionally continuously in real time, In order to ensure safety, the non-contact displacement measurement system with reliable reliability is provided.

The non-contact displacement measuring system according to the present invention includes a camera module for photographing a photographing area including the reference point in real time as moving images, the reference point being previously displayed on a specimen (boiler) A laser is emitted at a reference point indicated on the specimen (boiler), a laser dot point generated by the laser is positioned to coincide with the reference point, and a laser beam reflected from the reference point is received, A laser distance measuring module for measuring a displacement along the Z axis in real time with a distance; a camera module connected to the camera module for receiving a moving picture photographed by the camera module, converting the received moving picture into a digital signal, Separate and analyze pixel values in pixels for a divided image frame An image processor for determining in real time the displacement of the reference data and the X, Y, Z axes of the reference point based on the color values of the analyzed image frame; and an image processor connected to the image processor, An operation control unit connected to the operation control unit to track the camera module and the laser distance measurement module along a displaced reference point based on operation data of the operation control unit, An operation processing unit for applying a control signal to the servo motors so that the point of sight of the camera module and the dot position of the laser distance measurement module coincide with the displaced reference point and an operation processing unit connected to the operation control unit, And the control signal data for the servo motors applied by the operation processing unit are converted into numerical values And is connected to the storage unit, the operation processing unit for storage in real time, is applied to the data out of the specified range by a previously set data is applied from the operation processing unit includes an output portion outputting a warning signal to the sound and video.

At this time, the camera module according to the present invention includes a main body in which the operation control unit is built, a '?' Shaped bracket positioned at the upper part of the main body, the camera being disposed inside the main body, An X-axis servo motor coupled to an upper end of the bracket to rotate the bracket at a designated angle in accordance with a control signal applied from the operation processing unit to change an image pickup angle of the camera to an X-axis line, And a rotation shaft connected to one side of the bracket to rotate the rotation shaft at a designated angle in accordance with a control signal applied from the operation processing unit, Axis Y-axis servo motor for changing the shooting angle of the Y-

The laser distance measuring module according to the present invention is arranged on an upper part of a laser distance measuring instrument and rotates the laser distance measuring instrument according to a control signal applied from the operation processing part to change the aiming point of the laser distance measuring instrument to an X- A Z-axis servo motor is further included.

The non-contact displacement measuring apparatus according to the present invention has the following effects.

First, it is possible to monitor the thermal expansion and displacement / change status of the boiler in three-dimensional continuous real-time by installing it in the vicinity of the boiler without installing it directly in the boiler or installing it in the boiler. have.

Second, the boiler can be maintained in an optimum state, which prolongs the life span, secures safety, and ensures reliability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing a non-contact displacement measurement system according to an embodiment of the present invention.
2 is a view illustrating an example of a camera module and a laser distance measuring module according to an embodiment of the present invention.
FIG. 3 is a view illustrating a state in which a reference point X-axis displacement is determined according to an embodiment of the present invention.
FIG. 4 is a view illustrating a state in which a reference point Y-axis displacement is determined according to an embodiment of the present invention.
5 is a diagram illustrating a state in which a reference point Z-axis displacement is determined according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, at the time of the present application, It should be understood that variations can be made.

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

2 is a view illustrating an example of a camera module and a laser distance measuring module according to an embodiment of the present invention, and FIG. 3 is a view showing an embodiment of a non-contact displacement measuring system according to an embodiment of the present invention. 4 is a view illustrating a state for determining a Y-axis displacement of a reference point according to an embodiment of the present invention, and FIG. 5 is a view for explaining a method of determining a displacement of a reference point according to an embodiment of the present invention. Fig. 6 is a view showing a state in which the Z-axis displacement of the reference point is determined.

The present invention relates to a moving image photographed by a camera and a non-contact displacement measuring system for three-dimensionally real-time monitoring the displacement state due to thermal expansion of the boiler with a distance measured by a laser distance measuring instrument. A laser distance measurement module 200, an image processing unit 300, an operation control unit 400, an operation processing unit 500, a storage unit 600, and an output unit 700.

2, the camera module 100 is positioned such that the reference point P1 displayed on the sample (boiler) matches the predetermined aiming point P2 on the image, and then, The photographing area including the reference point P1 is photographed in real time as a moving image.

The camera module 100 according to the present invention includes a main body 110 having the operation control unit 400 and the operation processing unit 500. The main body 110 includes a main body 110, And supplies power to the camera 121, the laser distance measuring device 210 and the servo motors 130, 150 and 220, and supplies the power to the camera 121, the laser distance measuring device 210, .

The bracket 120 is supported by an X-axis servomotor 130. The bracket 120 is mounted on the X-axis servo motor 130, And rotates as the X-axis servo motor 130 is driven.

The X-axis servo motor 130 is disposed at a central portion of the main body 110. The X-axis servo motor 130 is coupled to the upper end of the main body 110. The X- Is rotated at a specified angle, and the photographing angle of the camera 121 is changed along the X axis.

The camera 121 is fixed to the pivot shaft 140 and disposed inside the bracket 120. The pivot shaft 140 is horizontally coupled to the upper portion of the bracket 120, The camera 121 is fixed to a central portion of the camera body 140.

At this time, the pivot shaft 140 is provided with bearings (not shown) on both left and right sides for stable rotation and is fixed to the bracket 120 by the bearings (not shown).

A Y-axis servo motor 150 is formed at one side of the bracket 120. The Y-axis servo motor 150 is mechanically connected to the rotation shaft 140, The rotation shaft 140 is rotated at a specified angle by a control signal, and the photographing angle of the camera 121 is changed along the Y axis.

A laser distance measurement module 200 is formed on one side of the camera module 100. The laser distance measurement module 200 outputs a laser to a reference point P1 indicated on the sample (boiler) The distance from the reference point P1 is measured by receiving the laser beam reflected from the reference point P1 after the dots P3 are aligned with each other and the displacement of the reference point P1 along the Z- .

In this case, the determination of the Z-axis displacement of the reference point P1 may be determined by the distance measured by the laser distance measurement module 200.

The laser distance measuring module 200 is installed by a mounting frame extending to one side of the bracket 120. The laser distance measuring device 210 is installed on the mounting frame, A Z axis servomotor 220 is configured to rotate the laser distance measuring device 210 to the left or to the right by a control signal applied from the operation processing unit 500, Change the position of the point P3 according to the left and right X-axis.

In addition, the image processing unit 300 is connected to the camera module 100 through a communication cable or a wireless communication module. The image processing unit 300 receives the moving image captured by the camera module 100 and converts the received digital signal into a digital signal , A moving image converted into a digital signal is divided into image frames, and the color values of each divided image frame are analyzed in units of pixels.

In this case, the color value is calculated by using OpenCVsharp to set the pixel color value (for example, red <R: 255, G: 0, B: 0>) to the reference point of the image frame to a certain range And recognizes the corresponding color value and compares it with the reference data of the previously inputted reference point to determine the displacement on the X and Y axes of the reference point.

The processing for the photographed light then converts the image frame to a gray image frame, converts the gray image frame to a binary image frame at an arbitrary threshold, and uses a function including blinking of the converted binary image frame to convert the white portion .

The operation control unit 400 is connected to the image processing unit 300 and calculates a tracking control signal for the reference point P1 based on the measurement data compared with the reference data in the image processing unit 300. [

At this time, the control signals for the X axis server motor 130, the Y axis server motor 150, and the Z axis server motor 220 are calculated based on the comparison determined data, ).

3 to 5, the operation processing unit 500 is connected to the operation control unit 400 and controls the operation of the camera module 100 and the laser distance measurement module 200 are traced along the displaced reference point P1 and the aiming point P2 of the camera module 100 and the dot point P3 of the laser distance measuring module 200 coincide with each other at the displaced reference point P1 Axis servo motor 130, the Y-axis server motor 150, and the Z-axis server motor 220, respectively.

At this time, the control signals are converted into numerical values to the X axis server motor 130, the Y axis server motor 150, and the Z axis server motor 220, respectively, and are applied to the storage unit 600.

The storage unit 600 is connected to the operation processing unit 500 and stores data applied by the operation processing unit 500 in real time and outputs the stored data according to the user's needs.

The operation processing unit 500 is connected to the output unit 700. When the signal applied from the operation processing unit 500 is out of a predetermined range, the operation processing unit 500 outputs an alarm signal to the speaker and monitor do.

When a plurality of non-contact displacement measurement systems according to the present invention are installed, the degree of deformation of the boiler may be determined by mapping the deformation of the boiler to a rectangular or cubic cross section.

In addition, the present invention can be applied to CCTV monitoring high-rise buildings to measure the displacement and deformation amount of high-rise buildings in real time, thereby preventing accidents such as building collapse.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

P1: reference point P2: aiming point P3: dot point
100: camera module 110:
120: Bracket 121: Camera
130: X-axis servo motor 140: Pivot shaft
150: Y axis servo motor 220: Z axis servo motor
200: Laser distance measuring module 210: Laser distance measuring instrument
300: image processing unit 400:
500: operation processing unit 600: storage unit
700: Output section

Claims (3)

A camera module for photographing a photographing area including the reference point in real time as a moving picture by locating a reference point previously displayed on a specimen (boiler) and an aiming point set in advance on the image;
A laser is emitted at a reference point indicated on the specimen (boiler), a laser dot point generated by the laser is positioned to coincide with the reference point, and a laser beam reflected from the reference point is received A laser distance measurement module for real-time measuring the displacement on the Z-axis line with the distance from the reference point;
The camera module is connected to the camera module. The camera module receives the moving picture, converts the received moving picture into a digital signal, divides the moving picture converted into the digital signal into image frames, analyzes pixel values of the divided image frames, An image processing unit for determining in real time the displacements on the X, Y and Z axes of the reference data and the reference point based on the color values of the analyzed image frame;
An operation control unit connected to the image processing unit to calculate a tracking control signal for a reference point based on measurement data compared with reference data in the image processing unit;
And an operation control unit for controlling the camera module and the laser distance measurement module based on the operation data of the operation control unit along the displaced reference point, An operation processing unit for applying a control signal to the servo motors so that the points coincide;
A storage unit connected to the operation control unit, the camera module, and the operation processing unit connected to the laser distance measurement module to digitize control signal data for the servo motors applied by the operation processing unit and store the numerical data in real time; And
Wherein the non-contact displacement measurement system includes an output unit connected to the operation processing unit and outputting a warning signal as sound and image when data applied from the operation processing unit is applied as data out of a predetermined range set in advance.
The method according to claim 1,
The camera module
A main body in which the operation control unit is incorporated;
A '┛' shaped bracket positioned above the main body and having the camera disposed therein;
An X-axis servo for changing an angle of photographing of the camera to an X-axis line by rotating the bracket at a designated angle in accordance with a control signal applied from the operation processing unit, motor;
A pivot shaft horizontally penetratingly connected to the bracket and having a camera disposed therein; And
And a Y-axis servo motor connected to the pivot shaft at one side of the bracket and configured to rotate the pivot shaft at a specified angle in accordance with a control signal applied from the operation processor to change the photographing angle of the camera to a Y axis line Non-contact displacement measurement system.
The method according to claim 1,
The laser distance measurement module
And a Z-axis servomotor that is disposed on an upper portion of the laser range finder and rotates the laser range finder in accordance with a control signal applied from the operation processor to change an aiming point of the laser range finder to an X- Measuring system.

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