KR102076709B1 - Trouble diagnosis system of measuring instrument for structure monitoring - Google Patents

Abstract

The present invention relates to a system for diagnosing an error of a measurement device for structure monitoring, which comprises: at least one measurement device mounted on a structure to be monitored; a data logger which collects measurement data outputted from the measurement device and commands to transmit the same; and an operation server which receives and stores the measurement data of the measurement device transmitted from the data logger, and analyzing the measurement data in order to determine and monitor structural stability of the structure to be monitored. Here, the data logger includes a diagnosis module which inputs a first diagnosis voltage which is set after a diagnosis signal is received from the outside, and delivers first diagnosis data outputted from the measurement device by the first diagnosis voltage to the operation server. In addition, the operation server outputs the diagnosis signal for determining an error of the measurement device at every predetermined first time and transmitting the same to the diagnosis module. Moreover, the first diagnosis data of the measurement device corresponding to the first diagnosis voltage of the diagnosis module are compared and analyzed in order to determine an error of the measurement device.

Description

Trouble diagnosis system of measuring instrument for structure monitoring

The present invention is to provide a more reliable diagnostic result information by diagnosing the abnormality of the measuring device based on each measurement data measured under the input condition of different diagnostic voltage for the measuring device provided for the monitoring of the structure The present invention relates to an error diagnosis system of a measuring instrument for monitoring.

Structural Health Monitoring System (SHMS), which is installed for the purpose of providing information for the design, construction and maintenance of similar structures, is warned early when structural performance problems such as bridges occur. to be.

All measurement systems that are applied to domestic sites or developed for field applications can be classified into signal-based algorithms. Research on the system identification (SI) technique includes neural network based damage assessment, ambient vibration based bridge rating, and hybrid SHM monitoring technique (hybrid SHM). technique). In particular, algorithms for structural assessment and damage diagnosis using neural network techniques have been actively applied for research, especially in universities.

USN sensor type monitoring is a monitoring example of transmitting data acquired from the sensor unit of a structure to a main controller by wireless (ZigBee) and transmitting to a data server through CDMA, monitoring of ZigBee wireless communication method and comparison with existing system There is an example, but it is still in the research stage.

For example, the monitoring system of cable bridges (limited to suspension bridges and cable-stayed bridges) on national roads is integrated with the existing national road management offices in 2009 and commissioned by the Korea Facilities Safety Corporation and the Korea Institute of Construction Technology. Construction is underway and maintenance consulting is provided for cable bridge design on national roads.

The development of the measurement system for long span cable bridges is centered on the specialists who build the system. Specialists are not doing specialized research on this because they are developing measurement systems to improve the problems that occur during the construction of the measurement system. In addition, the government, corporation and specialized research institutes do not continuously invest in the development of the measurement system, so the systematic research infrastructure is insufficient.

Currently, about 30 cable bridges are being shared on the national roads, including the West Sea Bridge, Yeongjong Bridge, Incheon Bridge, and Gwangan Bridge, and most of these bridges have a separate maintenance system and operate a measurement system. have.

On the other hand, the measurement system mentioned above includes sensors, data loggers, network equipment, data processing systems, and power units as components for determining the state of the structure. It may be difficult to determine whether there is an abnormality in the structure due to incomplete collection of measurement data due to defects, noise or the like.

In this way, if the failure of the measurement system is not identified in advance, it is difficult to determine whether the abnormality of the measurement system is caused by a disaster or the actual occurrence of an abnormality in the structure or an error due to the aging of the system or an equipment error.

Despite the fact that a disaster has occurred due to a malfunction in the structure, it is very important that the malfunction of the measurement system often fails to identify the structural abnormality of the structure.

In addition, the current measurement system has to be visited by a limited number of people in a distant field in order to identify the problem of the measurement system due to the absence of an error diagnosis function, delaying the inspection time and accordingly difficult and expensive There is an uneconomical aspect.

Accordingly, in order to remotely grasp the abnormality of the measurement system and secure necessary materials for repair or replacement in advance, or to perform efficient system maintenance by prioritizing it according to the severity, abnormality diagnosis function is urgently needed in the measurement system. to be.

Republic of Korea Patent Publication No. 10-2012-0114439 (2012.10.17.)

Therefore, an object of the present invention is to obtain more reliable diagnostic result information by diagnosing the abnormality of the measuring device based on each measurement data measured under the input condition of different diagnostic voltage for the measuring device provided for the monitoring of the structure. It is to provide an error diagnosis system of a measuring instrument for monitoring a structure.

In order to achieve the above technical problem, an abnormality diagnosis system (hereinafter, referred to as an “abnormal diagnosis system”) of a measuring device for monitoring a structure of the present invention may include one or more measuring devices mounted on a structure to be monitored; A data logger instructing to collect and transmit measurement data output from the measurement device; And an operation server for receiving and storing measurement data of the measuring device transmitted from the data logger and analyzing the measurement data to determine and monitor the structural stability of the structure to be monitored, wherein the data logger receives a diagnostic signal from the outside. And a diagnostic module configured to input the set first diagnostic voltage to the measuring device and to transmit the first diagnostic data output from the measuring device by the first diagnostic voltage to the operating server, wherein the operating server is configured every first time. Outputs a diagnostic signal for determining whether the measuring device is abnormal and transmits it to the diagnostic module, and compares and analyzes the first diagnostic data of the measuring device according to the first diagnostic voltage of the diagnostic module to determine whether there is an abnormality of the measuring device. Judgment is characteristic.

As one example, the operation server, by comparing the first diagnostic data of the measuring device according to the first diagnostic voltage of the diagnostic module to suspect the abnormality of the measuring device, at least 2 for the corresponding measuring device suspected abnormality Repeated more than once to determine whether there is an abnormality.

As one example, the operation server may record the number of occurrences of the abnormality of the measuring device, and may determine the abnormality of the corresponding measuring device when the number of the abnormal occurrences exceeds the set reference number.

As an example, the diagnostic module may include a second diagnostic voltage different from the first diagnostic voltage set for the measurement device suspected of abnormality from the operation server, and output from the measurement device by the second diagnostic voltage. The diagnostic data may be transmitted to the operation server, and the operation server may compare the second diagnosis data of the measurement device according to the second diagnosis voltage of the diagnosis module to determine whether there is an abnormality of the measurement device.

As one example, the operation server may be instructed to stop the measurement activity by cutting off the power supply to the measuring device suspected of abnormality.

As described above, the fault diagnosis system of the present invention provides more reliable diagnosis result information by diagnosing an abnormality of the measurement device based on respective measurement data measured under the input condition of different diagnosis voltages with respect to the measurement device provided for monitoring the structure. There is an effect that can be obtained.

In addition, it is possible to identify in advance through the diagnosis of abnormality of the measuring device, so that it is easy to judge whether the measuring device's abnormality has occurred due to the disaster disaster or whether the abnormality is caused by the aging of the system or the device error. Since it is possible to determine whether the measuring device is abnormal, it is possible to reduce the manpower and maintenance cost by not having to visit the inspection personnel in person.

1 is a view schematically showing an abnormal diagnosis system of the present invention.
2 is a flowchart illustrating a process for diagnosing abnormalities according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration of an abnormal diagnosis system according to an exemplary embodiment of the present invention.
4 is a side cross-sectional view showing an embodiment of a measuring instrument as one configuration of the present invention.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, the term or word used in the present specification and claims is based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her invention. It should be interpreted as meanings and concepts corresponding to the technical idea of

1 is a diagram schematically showing a fault diagnosis system of the present invention, Figure 2 is a flow chart for explaining the fault diagnosis process according to an embodiment of the present invention. 3 is a block diagram showing a configuration of an abnormality diagnosis system according to an embodiment of the present invention, and FIG. 4 is a side cross-sectional view showing an embodiment of a measuring device as one configuration of the present invention.

Referring to FIG. 1, the abnormality diagnosis system of the present invention may include a measurement device 100, a data logger 200, and an operation server 300.

The measuring device 100 may be installed at least one main part in the monitoring target structure (1), such as a bridge.

The measuring device 100 may include conventional sensors for evaluating the stability and health of the structure (1).

For example, the measurement device 100 may include one or more of a strain sensor, a temperature sensor, a three-axis acceleration sensor, a pressure sensor, and a displacement sensor, and generate real-time measurement data on displacement of the structure to be monitored 1. You can output it.

The data logger 200 may instruct to collect measurement data output from the measurement device 100 and transmit the measurement data to the operation server 300. In this case, the transmission period of the data logger 200 may be selectively set by the operation server 300 described below.

Abnormal diagnosis system of the present invention is not shown in the drawings but may further include a data collection unit provided between the data logger 200 and the operation server 300 to collect and process the measurement data collected by the data logger 200. have.

The data collection unit may collect data according to a unique communication method for each data logger 200, and temporarily store measurement data collected from the data logger 200 in an internal buffer and store the data in a predefined manner. After processing in the form of an integrated transport protocol (RDEP, Realtime Data Exchange Protocol) can be transmitted to the operation server 300 at the request of the operation server (300).

The operation server 300 may receive and store measurement data of the measurement device 100 transmitted from the data logger 200, and analyze the measurement data to determine structural stability of the structure 1 to be monitored. The processing result, the determination result, and the like can be monitored.

The operation server 300 may include a database unit 310 as shown in FIG.

The database unit 310 is an integrated database for storing measurement data transmitted from the data logger 200. For example, the database unit 310 may receive and classify and store data processed in the integrated communication protocol format in the aforementioned data collection unit. In addition, a plurality of storage spaces may be provided to have determinism according to the addition of the data logger 200.

The database unit 310 may include a real-time raw data storage unit for storing real-time data and a statistical data storage unit for storing statistics and analyzed data.

The operation server 300 may query the database unit 200 for data requested by an administrator, and provide the inquired data.

According to an embodiment of the present invention may further include an administrator terminal 400 that is connected to the operation server 300 can display data provided by the operation server 300, such a manager terminal 400 The data request command of an administrator may be input or the provided data may be processed and displayed in a form suitable for an installed operating system (OS).

Here, the manager terminal 400 may be one of a web service based computer, a web application, and a mobile application.

When the manager terminal 400 requests data such as real-time data, data to be displayed on the control screen, real-time analysis / stored data, and the like, the operation server 300 inquires the real-time row data storage unit of the database unit 310 to find the corresponding data. The data can be provided to the administrator.

When the manager terminal 400 requests data such as statistical data, measuring instrument information and formula management information, analysis data, report inquiry data, event and alarm inquiry data, and raw data file analysis data, the operation server 300 The statistical data storage unit of the database unit 310 may be inquired to provide corresponding data to an administrator.

Meanwhile, the abnormal diagnosis system of the present invention may collect the diagnostic data for the diagnosis of the measuring device 100 by the data logger 200 including the diagnostic module 210, and transmit the diagnostic data to the operation server 300. By transmitting, it may be configured to diagnose whether or not the measuring device 100 is abnormal.

Specifically, the data logger 200 may receive a diagnostic signal from the outside and input the first diagnostic voltage set to the measuring device 100, and output from the measuring device 100 in response to the first diagnostic voltage. It may include a diagnostic module 210 for transmitting the first diagnostic data to the operation server (300).

That is, the diagnostic module 210 inputs a first diagnostic voltage to the measuring device 100 in response to a diagnostic signal, and operates the first diagnostic data output from the measuring device 100 by the first diagnostic voltage. It may be delivered to the server 300.

In this case, the first diagnostic data may be measurement data measured by the measuring device 100 when the first diagnostic voltage is input, and the basic data for determining whether or not the measuring device 100 is abnormal by the operation server 300. It can be used as.

In addition, the operation server 300 outputs a diagnostic signal for determining whether the measurement device 100 is abnormal at every set first time, and transmits the diagnostic signal to the diagnosis module 210 and the first of the diagnosis module 210. The first diagnosis data of the measuring device 100 according to the diagnostic voltage may be compared and analyzed to determine whether the measuring device 100 is abnormal.

In this case, the first time may be selectively set by the operation server 300, and may be preferably set in units of 30 minutes or 1 hour.

The operation server 300 previously stores measurement data of a normal category according to a first diagnosis voltage as a reference value to be compared, and the first of the measurement device 100 according to the first diagnosis voltage of the diagnosis module 210. By comparing and analyzing the diagnostic data and the measurement data which is a reference value, it is possible to determine whether the measurement device 100 is abnormal.

In addition, the operation server 300 compares and analyzes the first diagnosis data of the measuring device 100 according to the first diagnostic voltage of the diagnostic module 210 before determining an abnormal occurrence of the specific measuring device 100. The abnormality of the measuring apparatus 100 may be suspected, and the presence or absence of the abnormality may be repeatedly determined at least twice with respect to the measuring apparatus 100 suspected of abnormality.

For example, the diagnostic module 210 inputs a second diagnostic voltage different from the first diagnostic voltage set for the measurement device 100 suspected of abnormality from the operation server 300 to the measurement device 100. The second diagnostic data output from the measuring device 100 by the second diagnostic voltage may be transmitted to the operation server 300.

That is, when the diagnostic module 210 performs the diagnosis twice or more with respect to the measuring device 100 suspected of abnormality, the diagnostic module 210 changes the resistance value to change the diagnostic voltage, thereby converting the second diagnostic voltage changed from the first diagnostic voltage. Input to the measuring device 100.

In this case, the second diagnostic voltage may be set to a voltage that is relatively higher than the first diagnostic voltage.

In addition, the operation server 300 may compare the second diagnostic data of the measuring device 100 according to the second diagnostic voltage of the diagnostic module 210 to determine whether there is an abnormality of the corresponding measuring device 100.

In this case as well, the operation server 300 previously stores measurement data of a normal category according to the second diagnosis voltage as a reference value for comparison, and measures the measurement device 100 according to the second diagnosis voltage of the diagnosis module 210. By comparing and analyzing the second diagnosis data of reference) and the measurement data which is the reference value, it is possible to determine whether the measurement device 100 is abnormal.

In addition, the operation server 300 may record the number of occurrences of the abnormality of the measuring device 100 as the diagnosis target, and may determine the abnormality of the corresponding measuring device 100 when the number of abnormal occurrences exceeds the set reference number.

In particular, the operation server 300 is to shut off the power supply to the measuring device 100 suspected of abnormality to command the measurement activity is stopped by the measurement data measured by the abnormality measuring instrument 100 is the stability of the structure (1) It is possible to prevent the reliability of the result from being lowered by not being reflected in the judgment.

Hereinafter, a process of diagnosing an abnormality of the abnormality diagnosing system of the present invention will be described with reference to FIG. 2.

The operation server 100 outputs a diagnostic signal for diagnosis of the measurement device 100 at each set time and transmits the diagnostic signal to the data logger 200.

The data logger 200 generates and outputs a first diagnostic voltage (reference '9V' of FIG. 2) for diagnosis of the measuring device 100 in response to the diagnostic signal transmitted from the operation server 100, and the diagnosis target. Input to the measuring device 100.

The diagnosis target measuring device 100 outputs measurement data measured when the first diagnosis voltage of the diagnosis module 210 is input to the data logger 200 as first diagnosis data, and in the data logger 200. The first diagnosis data of the diagnosis target measuring device 100 is transmitted to the operation server 300.

Meanwhile, the operation server 300 compares and analyzes the first diagnosis data of the diagnosis target measuring device 100 with preset reference data, and determines that the first diagnosis data is within a normal error range. The diagnosis is determined to be normal and the diagnosis is terminated.

If it is determined that the first diagnostic data is out of the normal error range, the operation server 300 determines that the diagnosis target measuring device 100 is suspected of abnormality, and thus repeatedly diagnoses the diagnosis target measuring device 100. This can be done.

Referring to FIG. 2, the operation server 300 transmits another diagnostic signal to the data logger 200 for re-diagnosis of the corresponding measurement target measuring device 100. By changing the resistance value to change the diagnosis voltage to generate and output the second diagnostic voltage (12V reference to Fig. 2), the second diagnostic voltage output to the corresponding diagnostic target measuring device 100 is input.

In addition, the corresponding diagnostic target measuring device 100 having the second diagnostic voltage inputted outputs measurement data measured when the changed second diagnostic voltage is input to the data logger 200 as second diagnostic data, and the data logger ( In operation 200, the second diagnostic data of the diagnosis target measuring device 100 is transmitted to the operation server 300.

Thereafter, the operation server 300 compares and analyzes the second diagnostic data with the preset reference data in the same method, and records the number of occurrences of abnormalities for the same diagnosis target measuring device 100 when it is determined that the second diagnostic data is within the normal range. If the abnormality is repeatedly present and the number exceeds the set reference number, the diagnosis target measuring device 100 is finally determined to be abnormal.

As described above, the abnormality diagnosis system of the present invention performs repeated diagnosis while changing the diagnosis voltage rather than the same condition for the abnormality of the measuring device 100, thereby providing more reliable diagnosis and as a result, whether the measuring device 100 is accurate or not. Will be able to judge.

Meanwhile, in the present invention, as shown in FIG. 4, in the configuration of the measuring device 100, a three-axis acceleration sensor 110 attached to the structure c and an outer circumference of the three-axis acceleration sensor 110 are applied. And a buffer coating layer 120 made of an elastic material to form pores, a heat treatment layer 130 for finishing the surface of the buffer coating layer 120 through heat treatment, and a water repellent coating layer applied to an outer circumference of the heat treatment layer 130 ( 140) is included.

That is, in the present embodiment, while protecting the three-axis acceleration sensor 110 from the outside, the three-axis acceleration sensor 110 by blocking the transmission of the signal for the impact to the three-axis acceleration sensor 110 for the external physical shocks ) Is to accurately sense only the vibration transmitted from the structure (c).

In the case of the buffer coating layer 120 to mitigate the external shock transmitted to the buffer coating layer 120 to prevent the transmission of vibration energy due to the external shock to the three-axis acceleration sensor (110).

However, the above-mentioned external shock refers to physical shocks such as impacts caused by natural disasters such as impacts caused by any object, rain or wind. In addition to such physical shocks, sound waves such as wind noise and bridge driving sounds Even when the vibration energy is transmitted to the triaxial accelerometer 110, the sound wave acts as noise in sensing the vibration of the structure by the triaxial accelerometer 110.

In addition, when water droplets are formed by the moisture outside the 3-axis acceleration sensor 110, such water droplets distort the vibration energy caused by physical shocks and sound waves transmitted from the outside, thereby acting as a factor to lower the accuracy of the vibration signal generated in the structure. Done.

Therefore, in the present invention, the buffer coating layer 120 of the elastic material is formed on the outer periphery of the three-axis acceleration sensor 110 to form a pore, and the heat treatment layer 130 for finishing the surface of the buffer coating layer 120 by heat treatment ), And the water-repellent coating layer 140 applied to the outer circumference of the heat treatment layer 130).

The above-mentioned physical external shock is mitigated by the buffer coating layer 120 of the elastic material forming the pores, and the external signal due to physical shock and the external signal due to physical shock are absorbed to absorb the vibration energy caused by the sound wave. It is to block the transmission to the three-axis acceleration sensor (110).

The water repellent coating layer 140 is intended to block the formation of water droplets on the surface as it can distort the vibration signal from the outside or inside as mentioned above when water droplets are formed on the surface by moisture or the like. Since the water-repellent coating layer 140 has various known materials, its detailed description will be omitted.

However, when the water repellent coating layer 140 is directly applied to the outer circumference of the buffer coating layer 120, the coating liquid of the water repellent coating layer 140 is filled in the internal voids of the buffer coating layer 120, so that the buffer coating layer 120 has a physical external impact. Not only the elastic force to relieve is reduced, but also the problem that the function to absorb the vibration energy due to sound waves is deteriorated.

Accordingly, in the present invention, the heat treatment layer 130 is placed between the buffer coating layer 120 and the water repellent coating layer 140. The heat treatment layer 130 finishes the surface of the buffer coating layer 120 through heat treatment to form a buffer coating layer ( The internal voids of the 120 are blocked to the outside so that the water-repellent coating liquid is blocked from filling the internal voids of the buffer coating layer 120 when the water-repellent coating layer 140 is applied. Here, the heat treatment for forming the heat treatment layer 130 can be applied to a variety of well-known techniques such as UV, detailed description thereof will be omitted.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

100: measuring device 200: data logger
210: diagnostic module 300: operation server
310: database unit

Claims (6)

One or more measuring devices mounted on the structure to be monitored;
A data logger instructing to collect and transmit measurement data output from the measurement device; And
Operation server for receiving and storing the measurement data of the measuring device transmitted from the data logger and analyzing the measurement data to determine and monitor the structural stability of the structure to be monitored;
The data logger,
And a diagnostic module configured to receive a diagnostic signal from an external device, input a set first diagnostic voltage to the measuring device, and transmit first diagnostic data output from the measuring device by the first diagnostic voltage to the operation server.
The operation server,
Outputs a diagnostic signal for determining whether there is an abnormality of the measuring device at each set first time and transmits it to the diagnostic module, and compares and analyzes first diagnostic data of the measuring device according to the first diagnostic voltage of the diagnostic module. Determine the abnormality of the device,
The measuring device,
A three-axis acceleration sensor attached to the structure, an elastic material buffer coating layer applied to the outer periphery of the three-axis acceleration sensor to form a pore to absorb external vibration and absorb vibration energy by sound waves, and the surface of the buffer coating layer The heat treatment layer to finish through the heat treatment, and the water-repellent coating layer is applied to the outer periphery of the heat-treated layer includes the heat-resistant layer to the internal voids of the buffer coating layer to the outside and the coating liquid of the water-repellent coating layer when the water-repellent coating layer is applied to the buffer coating layer Abnormal diagnosis system of the measuring device for monitoring the structure, characterized in that to prevent the filling in the internal voids.
The method of claim 1,
The operation server,
Comparing and analyzing the first diagnostic data of the measuring device according to the first diagnostic voltage of the diagnostic module to suspect the abnormality of the measuring device, and to determine whether there is an abnormality by repeating at least two times for the measuring device suspected of abnormality. An error diagnosis system of a measuring instrument for monitoring a structure.
The method of claim 2,
The operation server,
And recording the number of occurrences of the abnormality of the measuring device and determining the abnormality of the corresponding measuring device when the number of occurrences of the abnormality exceeds a set reference number.
The method of claim 2,
The diagnostic module,
Input a second diagnostic voltage different from the first diagnostic voltage set for the measuring device suspected of abnormality from the operating server to the measuring device, and transmit the second diagnostic data output from the measuring device by the second diagnostic voltage to the operating server; ,
The operation server,
And analyzing the second diagnostic data of the measuring device according to the second diagnostic voltage of the diagnostic module to determine whether there is an abnormality of the corresponding measuring device.
The method of claim 2,
The operation server,
The abnormality diagnosis system of the measuring device for monitoring the structure, characterized in that the power supply for the measuring device suspected of abnormality to shut off the measurement activity.
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