KR101638864B1 - Damage Detection System and Method - Google Patents

Abstract

The present invention relates to a damage detection system and method, and a system according to the present invention includes an actuator for emitting an impulse signal generated in a signal generator to a detection target, a sensor for receiving an impulse response signal corresponding to the impulse signal, And analyzing the received impulse response signal to determine whether the detection target is damaged or damaged. According to the present invention, it is possible to more easily grasp the damage and the damage location of the detection object and share information with other users by using an application provided in the mobile terminal without any additional analysis equipment.

Description

[0001] Damage Detection System and Method [

The present invention relates to a damage detection system and method, and more particularly, to a damage detection system and method capable of receiving a response of an impulse signal radiated to a structure to detect damage such as deterioration or cracks generated in the structure.

Generally, various structures such as power plants, airplanes, ships, bridges, and nuclear reactors are deteriorated when they are used for a long period of time, and cracks are generated inside. These cracks gradually change from the initial small form to the large form over time and eventually cause the collapse of the structure itself, resulting in large-scale loss of life and property.

Therefore, methods such as periodical visual inspection are used to detect cracks and prevent damage to human life and property. In the case of a visual inspection, it is possible to grasp the cracks generated from the outside most certainly, but it has a problem that it can not grasp the internal cracks. In addition, there are not many technicians for exploring cracks, and it is very cumbersome and labor-intensive to perform visual inspection.

Conventionally, a method of finding a crack or evaluating the size of a crack by using various inspection apparatuses has been developed.

For example, there is a method of irradiating an X-ray to an object to be inspected and capturing the transmitted X-ray with a camera to analyze cracks and the like. However, the X-ray is effective for detecting an open crack having a volume, Is very small, it is difficult to change the attenuation of the X-ray as a healthy part and a part of the crack, and it is difficult to detect and evaluate precise cracks.

In addition, the analysis equipment for detecting cracks by analyzing X-rays is very expensive and the administrator has to constantly monitor the analysis equipment, which is troublesome and time-consuming.

In addition, conventional analytical instruments have had a difficulty in sharing the results of analysis with other administrators at a remote location.

Japanese Patent Publication No. 9-297111 (published on November 18, 1997)

Accordingly, a problem to be solved by the present invention is to provide a damage detection system and method capable of easily grasping the damage and the damage position of the detection object and sharing it with other users by using an application provided in the mobile terminal without a separate analysis equipment .

Further, the present invention includes other objects that can be achieved from the construction of the present invention described later, in addition to the objects explicitly mentioned.

According to an aspect of the present invention, there is provided a damage detection system including an actuator for radiating an impulse signal generated in a signal generator to a detection target, a sensor for receiving an impulse response signal corresponding to the impulse signal, And a portable terminal for analyzing the received impulse response signal to determine whether the detected object is damaged or damaged.

The mobile terminal may include an application for analyzing the received impulse response signal according to a correlation index model to calculate damage index information and damage location information of the detection target.

)는,

로 산출되고, COV는 공분산으로,

이고,

는 엑츄에이터의 입력이고,

는 센서의 출력일 수 있다.The damage index information of the detection target

),

, COV is a covariance,

ego,

Is the input of the actuator,

May be the output of the sensor.

로 파악되되, 0<

<1이면 손상이고,

=1이면 손상이 없는 것일 수 있다.Whether or not the object to be detected is damaged

Respectively,

&Lt; 1 is damaged,

= 1, it may be that there is no damage.

The application may generate a warning signal if the detected damage of the detected object is equal to or greater than a preset threshold value.

The mobile terminal can transmit information on the detected damage to the detected user and damage information to other user terminals.

The actuator may be installed on the object to be detected, the sensor may be provided on the object to be detected, and may be spaced apart from the actuator by a predetermined interval.

Meanwhile, in the damage detection method according to an embodiment of the present invention, an actuator radiates an impulse signal generated in a signal generator to a detection object, a sensor receives an impulse response signal corresponding to the impulse signal, And analyzing the received impulse response signal to determine whether the target is damaged or damaged.

Wherein the step of analyzing the received impulse response signal and determining the damage location and the damage location of the detection target by analyzing the received impulse response signal according to a correlation index model, And calculating the position information.

)는,

로 산출되고, COV는 공분산으로,

이고,

는 엑츄에이터의 입력이고,

는 센서의 출력일 수 있다.The damage index information of the detection target

),

, COV is a covariance,

ego,

Is the input of the actuator,

May be the output of the sensor.

로 파악되되, 0<

<1이면 손상이고,

=1이면 손상이 없는 것일 수 있다.Whether or not the object to be detected is damaged

Respectively,

&Lt; 1 is damaged,

= 1, it may be that there is no damage.

And generating a warning signal if the mobile terminal determines that the detected object is damaged or not, the predetermined value being greater than a predetermined threshold value.

The mobile terminal may further include a step of transmitting information on the detected damage and the damage location to the other user terminals.

As described above, according to the damage detection system and method according to the embodiment of the present invention, it is possible to more easily grasp the damage and the damaged position of the detection target by using the application provided in the mobile terminal without a separate analysis equipment.

In addition, since there is no need for the manager to continuously monitor the analysis equipment, it is possible to reduce the troublesome and unnecessary time wasted, and the cost can be saved because expensive analysis equipment is not needed.

In addition, since it is possible to transmit a result obtained by the portable terminal to another user terminal, it is advantageous to be able to conveniently share with other administrators. If the detected result is more than a threshold value, a warning signal is generated in real time, It is possible to provide a means for preventing the above-mentioned problems.

On the other hand, the effects of the present invention are not limited to those described above, and other effects that can be derived from the constitution of the present invention described below are also included in the effects of the present invention.

1 is a block diagram of a damage detection system according to an embodiment of the present invention.
2 is a detailed configuration diagram of the portable terminal shown in Fig.
3 is a flowchart illustrating a damage detection process according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a configuration diagram of a damage detection system according to an embodiment of the present invention, and FIG. 2 is a detailed configuration diagram of the portable terminal shown in FIG.

1 and 2, the damage detection system 1 includes a signal generator 100, an actuator 200, a sensor 300, and a portable terminal 400.

The signal generator 100 may generate an impulse signal. The signal generator 100 may generate an impulse signal having an accurate output level and frequency necessary for performing the damage check on the object 10 to be detected.

The actuator 200 can radiate the impulse signal generated from the signal generator 100 to the detection object 10.

More specifically, the actuator 200 may be installed on one side of the object to be detected 10 and may be electrically connected to the signal generator 100 to receive the impulse signal generated by the signal generator 100. The actuator 200 radiates the received impulse signal to be propagated to the sensor 300 and is configured to receive the impulse signal reflected from the crack when a damage such as a crack is generated in the detection target 10 .

The sensor 300 may be installed on the other side of the object to be detected 10 and may receive an impulse response signal corresponding to the impulse signal at a predetermined interval from the actuator 200.

For example, if there is a crack in the detection object 10 in the process of propagating the impulse signal from the actuator 200 to the sensor 300, the shape of the impulse signal changes. The sensor 300 receives information about the impulse response signal To the portable terminal 400 so that the portable terminal 400 can be used for damage measurement and prediction of the detection target 10. [ At this time, the sensor 300 may be a sensor for measuring a physical phenomenon such as a piezoelectric sensor.

The portable terminal 400 is an information communication terminal used by an administrator who manages or monitors the detection object 100. The portable terminal 400 may be an ultra mobile personal computer (UMPC), a tablet PC, a personal digital assistant (PDA) a web pad, and the like, and may be implemented as a terminal equipped with a microprocessor and having computing capability. The portable terminal 400 may be provided with various applications and may provide various services to the user.

More specifically, the portable terminal 400 may include a communication unit 410, a control unit 430, a storage unit 450, and an output unit 470.

The communication unit 410 may be connected to the sensor 300 through a wired or wireless communication method to receive the impulse response signal transmitted from the sensor 300. The wired communication method may include a communication method using a multiport or a universal serial bus (USB) cable. The wireless communication method may include Wi-Fi, bluetooth, zigbee, IrDA , Infrared Data Association (UWB), Ultra Wide Band (UWB), or Radio Frequency Identification (RFID).

The communication unit 410 is connected to the application server 500 and the first to nth user terminals 600a to 600n which are other user terminals through the communication network 20 to exchange various information and data.

The network 20 may be a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), the Internet, a 2G, 3G, 4G mobile communication network, a Wi- Fi, WiBro, Value Added Network (VAN), etc., and the communication method does not depend on wired or wireless, and any communication method may be used.

The control unit 430 may be implemented by a central processing unit (CPU) and a mobile operating system, and may perform functions to control various operations of the portable terminal 400 as a whole. For example, the control unit 430 can be implemented as a CPU and an Android platform. In particular, the controller 430 according to an exemplary embodiment of the present invention may be provided with an application 431 for analyzing the impulse response signal received from the sensor 300 and determining whether the target is damaged or damaged. The application 431 can be installed in the portable terminal 400 by downloading an installation file from an application market (not shown) such as an app store, an Android market, and the like.

The application 431 receives the impulse response signal transmitted from the sensor 300, converts the impulse response signal into digital data, and analyzes the converted digital data according to the user's request. The application 431 analyzes the digital data and compares the output signal of the sensor 300 with respect to the input signal of the actuator 200 to detect a change in the waveform. Using the change in the detected waveform, .

)를 산출할 수 있다.More specifically, the application 431 analyzes the received impulse response signal according to the correlation exponent model as shown in Equation (1)

) Can be calculated.

(1)

이고,

는 엑츄에이터(200)의 입력이고,

는 센서(300)의 출력이다.COV is a covariance,

ego,

Is the input of the actuator 200,

Is the output of the sensor (300).

Then, the application 431 can determine whether the detection target 10 is damaged, as in the following equation (2).

(2)

<1이면 손상이고,

=1이면 손상이 없는 것으로 파악할 수 있다.At this time, the application 431 sets 0 <

&Lt; 1 is damaged,

= 1, it can be determined that there is no damage.

The application 431 can generate a warning signal if the detected damage of the detected object 10 is equal to or greater than a preset threshold value. For example, when the damage of the detection target 10 is determined to be equal to or greater than a predetermined threshold value, the application 431 outputs a warning message, a warning sound, or the like so that the administrator can find a means for preventing the detection target 10 from being damaged do.

Meanwhile, the portable terminal 400 transmits information on the damage and the damage location of the detection target 10 to the application server 500 through the communication unit 410 and stores it in a database (not shown) 500 to the first to nth user terminals 600a to 600n. That is, the portable terminal 400 can transmit information on the damage and the damage location of the detection target 10 to other user terminals 600a to 600n installed with the application, and can share the information. Therefore, it can be used to grasp the detection target 10 by conveniently sharing information with other managers at a remote location.

The storage unit 450 may store a control program for controlling the portable terminal 400 and applications and programs for performing various functions. In addition, the storage unit 450 may store various information and data for grasping the damage of the detection object and the damage location.

The output unit 470 may display various information and data related to the operation of the portable terminal 400 under the control of the controller 430. The output unit 470 may include a liquid crystal display (LCD) panel, a light emitting diode (LED) Panel, an AM OLED (Active Matrix Organic Light-Emitting Diode) panel, or the like.

The output unit 470 may include a speaker or the like and may output a warning sound if the damage of the detection object is equal to or greater than a predetermined threshold value.

Hereinafter, a damage detection method according to an embodiment of the present invention will be described.

3 is a flowchart illustrating a damage detection process according to an embodiment of the present invention.

Referring to FIG. 3, the actuator 200 may emit an impulse signal generated in the signal generator 100 to the detection target 10 (S300).

More specifically, the actuator 200 may be installed on one side of the object to be detected 10 and may be electrically connected to the signal generator 100 to receive the impulse signal generated by the signal generator 100. The actuator 200 radiates the received impulse signal to be propagated to the sensor 300 and is configured to receive the impulse signal reflected from the crack when a damage such as a crack is generated in the detection target 10 .

Then, the sensor 300 may receive the impulse response signal corresponding to the impulse signal (S310).

For example, if there is a crack in the detection object 10 in the process of propagating the impulse signal from the actuator 200 to the sensor 300, the shape of the impulse signal changes. The sensor 300 receives information about the impulse response signal To the portable terminal 400 so that the portable terminal 400 can be used for damage measurement and prediction of the detection target 10. [ At this time, the sensor 300 may be a sensor for measuring a physical phenomenon such as a piezoelectric sensor.

Next, the portable terminal 400 analyzes the received impulse response signal to determine whether the detection target 10 is damaged or damaged (S320).

)를 산출할 수 있다.More specifically, the portable terminal 400 analyzes the received impulse response signal according to the correlation exponent model as shown in the following equation (1)

) Can be calculated.

(1)

이고,

는 엑츄에이터(200)의 입력이고,

는 센서(300)의 출력이다.COV is a covariance,

ego,

Is the input of the actuator 200,

Is the output of the sensor (300).

The portable terminal 400 can grasp whether the detection target 10 is damaged as in the following (Equation (2)).

(2)

<1이면 손상이고,

=1이면 손상이 없는 것으로 파악할 수 있다.At this time, the portable terminal 400 sets 0 <

&Lt; 1 is damaged,

= 1, it can be determined that there is no damage.

Then, the portable terminal 400 can generate a warning signal if the detected damage of the detected object 10 is equal to or greater than a preset threshold value. For example, if the application 431 judges that the damage of the detection object 10 is large, the application 431 outputs a warning message, a warning sound, or the like so that the administrator can find a means for preventing the detection object 10 from being damaged.

The portable terminal 400 transmits information on the damage and the damage location of the detection target 10 to the application server 500 through the communication unit 410 and stores the information in the database (not shown) N to the first to nth user terminals 600a to 600n via the first to nth user terminals 600a to 600n. That is, the information about the damage and the damage location of the detection target can be shared with other user terminals installed with the application. Then, it can be used to grasp the target of detection by sharing information conveniently with other managers at a remote location.

Embodiments of the present invention include a computer-readable medium having program instructions for performing various computer-implemented operations. The medium records a program for executing the above-described damage detection method. The medium may include program instructions, data files, data structures, etc., alone or in combination. Examples of such media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD and DVD, programmed instructions such as floptical disk and magneto-optical media, ROM, RAM, And a hardware device configured to store and execute the program. Or such medium may be a transmission medium, such as optical or metal lines, waveguides, etc., including a carrier wave that transmits a signal specifying a program command, data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

1: Damage detection system
100: Signal generator 200: Actuator
300: Sensor 400: Portable terminal
410: communication unit 430:
431: Application 450:
470:

Claims (13)

An actuator for radiating an impulse signal generated from the signal generator to a detection target,
A sensor for receiving an impulse response signal corresponding to the impulse signal, and
And a mobile terminal for analyzing the received impulse response signal to determine whether the detected object is damaged or damaged,
The mobile terminal includes:
And an application for analyzing the received impulse response signal according to a correlation index model to calculate damage index information and damage location information of the detection target,
The damage index information of the detection target

),

Lt; / RTI &gt;
COV is a covariance,

ego,

Is the input of the actuator,

Is the output of the sensor. delete delete The method of claim 1,
Whether or not the object to be detected is damaged,

However,
0 <

&Lt; 1 is damaged,

= 1, no damage is detected. The method according to claim 1 or 4,
The application comprises:
And generates a warning signal if the detected damage of the detected object is equal to or greater than a predetermined threshold value. The method of claim 1,
The mobile terminal includes:
And transmits the information on the detected damage to the other user terminals. The method of claim 1,
The actuator includes:
And a control unit,
The sensor includes:
Wherein the damage detection system is installed at the object to be detected, and is spaced apart from the actuator at a predetermined interval. The step of the actuator radiating the impulse signal generated in the signal generator to the object to be detected,
The sensor receiving an impulse response signal corresponding to the impulse signal, and
And analyzing the received impulse response signal to determine whether the target is damaged or damaged,
The step of the mobile terminal analyzing the received impulse response signal to determine whether the target is damaged or damaged is characterized by comprising:
And analyzing the received impulse response signal according to a correlation index model to calculate damage index information and damage location information of the detection target,
The damage index information of the detection target

),

Lt; / RTI &gt;
COV is a covariance,

ego,

Is the input of the actuator,

Is the output of the sensor. delete delete 9. The method of claim 8,
Whether or not the object to be detected is damaged,

However,
0 <

&Lt; 1 is damaged,

= 1, no damage is detected. The method of claim 8 or 11,
Further comprising the step of generating a warning signal if the mobile terminal determines that the detected object is damaged or not, the predetermined value being greater than a predetermined threshold value. 9. The method of claim 8,
Further comprising the step of the mobile terminal transmitting to the other user terminals information on the detected damage and damage location of the detected object.

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