KR100365139B1 - Receiving device of earthquake wave - Google Patents

Abstract

The present invention stores the information of the earthquake received from the seismic wave detection device in the built-in expansion memory card, analyzes the acceleration data of the transmitted ground, and analyzes the transmitted ground acceleration data. After filtering only the components, calculate the maximum ground acceleration by vector-synthesizing the horizontal two components (the north-south direction, the east-west direction) and the one vertical direction, and convert the measured actual earthquake situation to 4 ~ 20mA according to the size to the local control center. It transmits to RTU at static pressure base for transmission, has LCD panel to check earthquake behavior when earthquake occurs, and seismic wave with input function using touch screen to set various parameters necessary for self-diagnosis and operation It relates to a receiving device.

Description

Receiving device of earthquake wave

The present invention relates to a seismic wave receiving device, and more particularly, to store the earthquake information received from the seismic wave detecting device in an expansion memory card having a built-in memory, and analyze the acceleration data of the transmitted ground to apply the ground vibration to the supply management station. After filtering only the seismic wave components of the natural frequency band, which is most vulnerable, the central management station calculates the maximum ground acceleration by vector-synthesizing two horizontal components (North-North and East-West) and one vertical direction. According to 4-20mA, it transmits to RTU at constant pressure base for transmission to local control station. It has LCD panel to check earthquake behavior in case of earthquake, and it is possible to set various parameters for self-diagnosis and operation. It relates to a seismic wave receiving device having an input function using a touch screen.

In general, an earthquake is a wave caused by a sudden crustal change somewhere in the earth, that is, an earthquake wave is transmitted to the earth's surface and shakes the ground. can do. Earthquakes are detected almost simultaneously in large areas. At this time, if you check the degree of shaking, that is, the intensity of each area, you can feel the shaking in the far place where the shaking is weakened when it is the strongest within a narrow range and far from it. This allows us to see that earthquakes have the same properties as sound waves that ring in all directions when hitting a bell.

The most likely cause of such earthquakes is the plate tectonics, which appeared in the late 1960s. According to this theory, the Earth's surface consists of lithospheres of several tens of kilometers or more, which are divided into ten plates, the Pacific, North American, and Eurasian, each at a rate of several centimeters each year. It is moving. Earthquakes occur mainly near plate boundaries due to these relative movements, and also in the intraplate earthquake near the boundary. Most of the occurrence in Japan occurs on the Pacific side, which can be explained by the fact that the plate boundary earthquake is causing the Pacific to collide under the Eurasian Plate.

In the method of measuring such an earthquake, when the heavy weight is hung on the thread and the end of the thread is fastened to the left and right, the weight remains stationary. The first seismograph uses this principle. When an earthquake occurs, the ground shakes and the seismograph embedded in the ground shakes, but since the earthquake's overtaking is stopped by inertia, the ground can be recorded on a rotating cylinder record sheet. Seismographs include horizontal and vertical seismometers, and seismic stations record and analyze three-dimensional earthquakes by installing a pair of horizontal seismometers in a direction orthogonal to each other (Z axis). Modern seismographs use complex electronic equipment to record earth shakes, but the basic concept is the same as early seismographs.

In terms of the magnitude of the earthquake, the magnitude, or magnitude, of the earthquake depends largely on the magnitude, epicenter, and depth of the earthquake, and can be assessed according to the geological structure, structure and population of the area. Progress is divided into classes and is not uniform across the world, and each country adopts a scale that fits its situation. The Korean Meteorological Administration uses the JMA Scale classified by the Japan Meteorological Administration. The JMA scale is Grade 8, while the MSK scale, which originated in the United States and attempted international unification of the MM scale used in various countries and the progress grade, has a Grade 12 (see Table 1 below).

scale Explanation MM Scale Righter scale I 0 -4.3 The degree to which vibration is recorded by the machine Ⅱ To the extent that a person relaxing upstairs feels Ⅲ You can feel the shaking in the room, and the moving object Ⅳ 4.3-4.8 The plate shakes Ⅴ The sleeper wakes up, the door moves, and the water overflows from the glass. Ⅵ 4.8-6.2 The steps are not stable, the windows shake, and the pictures on the wall fall. Ⅶ It's hard to stand and the bricks and tiles fall down Ⅷ 6.2-7.3 The car is hard to drive. The chimney collapses, the branches break, and cracks form on the wet ground. Ⅸ There is a sense of fear. The buildings are damaged. A sand breeze occurs. Ⅹ Most buildings are destroyed. Landslides and tsunamis occur. ⅩⅠ 7.3-8.9 Railway tracks bend and roads collapse. Large cracks occur in the ground, and the rocks collapse. XII Everything is destroyed, the surface shakes and the river stem changes direction.

The conventional seismograph measures the acceleration of the ground using a speed or acceleration sensor and transmits the acceleration to the control station. The control station uses the transmitted data to analyze the seismic response characteristics and obtain the strength of the earthquake. In the conventional earthquake detection system, since the characteristics of the earthquake response can be analyzed by the analysis program only when data is transmitted to the control station, it takes a long time to deal with an accident, and it is not possible to check the analysis result and the warning about the earthquake. have. In addition, the first consideration in installing and operating a system for monitoring the safety situation of a facility that has a risk of damage or collapse of a building due to an earthquake is the on-site measures through quick measurement and analysis of results. The prior art as described above has a problem that it is not possible to grasp the impact of the earthquake in the field, it takes a lot of time to analyze the impact of the earthquake and provide information for on-site action.

In addition, when an earthquake occurs, there is the most vulnerable frequency band for the seismic waves of all the facilities, one of which is the natural frequency of the facility. Therefore, in the measurement and analysis of earthquakes for the safety of hazardous facilities, the strength and SI of seismic waves should be calculated in the band near the natural frequency of the facility from the earthquake wave, and the result is closely related to the degree of damage to the facility. Although it can be determined in the prior art, there was a problem in that no countermeasure could be taken because the SI value could not be calculated in such a dangerous facility.

In addition, the risk factors in the event of an earthquake as described above may primarily include the collapse of facilities, etc. In recent years, however, secondary risk factors such as gas explosions and fires, in which the magnitude of damage is greater, are more problematic. As the Korean peninsula is recently classified as an earthquake danger zone, there is a need for a device that can continuously monitor earthquake occurrences, identify whether the earthquake intensity affects the safety of gas facilities, and provide information to block gas by region. The situation is rising more.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to store the information of the earthquake received from the seismic wave detection device in the built-in expansion memory card, and analyzes the transmitted acceleration data of the ground Of the ground vibration applied to the supply station, filter the seismic wave components of the natural frequency band which is the most vulnerable, and then calculate the maximum ground acceleration by vector-synthesizing the two components in the horizontal direction (North-North, East-West) and the vertical direction. The measured earthquake situation is converted to 4 ~ 20mA according to the size and sent to the RTU at the static pressure base for transmission to the local control center.It has an LCD panel to check the behavior of the earthquake in case of an earthquake. Seismic wave with input function using touch screen to set various necessary parameters It is to provide a receiving device.

1 is a control block diagram of a seismic wave receiving apparatus according to the present invention.

2 is an interconnection diagram of a seismic wave receiving device according to the present invention;

3 and 4 show the external structure of the present invention.

5 is a graph comparing acceleration vertical components of measurement points of the present invention.

6 is a graph showing the vector synthesis acceleration and SI value of the present invention.

7 is a view showing the seismic data management state of the present invention on a monitor screen.

<Description of the symbols for the main parts of the drawings>

20: I / O terminal 21: I / O communication module

22 band pass filter 23 control unit

24: SI and acceleration calculation module 25: self-diagnosis module

26: trigger module 27: memory

28: LCD display unit 29: touch screen input unit

30: alarm means 31: data output unit

32: I / O communication module 33: I / O terminal

34: RS-232C port 35: noise filter

36: external memory card 37: card reader

Features of the present invention for achieving the above object, the input and output communication module for inputting the signal output from the seismic wave detection device into the device via the input and output terminal; A band pass filter for appropriately processing signals inputted from the input / output communication module to remove various noises, analyzing the frequency components and waveforms, and selecting only necessary signals having a set bandwidth; The signal is received from the band pass filter, processed, and then output to the data output unit. Algorithms such as general control of each function, assignment of variables, storage, recording control, management functions, and calculations are performed, and SI and maximum ground acceleration values are used. SI and acceleration calculation module to obtain the value, shock and earthquake identification ability by frequency analysis when the value over preset alarm value is input, and the trigger module to store these values in the internal or external memory, and stable operation and reliability A control unit including a self-diagnosis module which performs a self-diagnosis function at least once upon power-on to check an internal device function and transmits a result to the RTU when a failure or a function is detected to maintain the power; Graphic, maximum ground acceleration value, speed response spectrum for three axes so that various operation information and function of the site such as earthquake or normal ground acceleration generated in the field can be monitored under the control of the controller. LCD display unit for displaying the SI value; A touch screen input unit configured on the surface of the LCD display unit as an input function for inputting various damping factors (earthquake alarm time point, self-diagnosis period, SI value) required for operation to the control unit and adjusting the zero point of the seismic wave detection device; Alarm means for outputting an alarm by a siren when a value equal to or greater than a threshold value set by the controller is detected; An external memory card for storing seismic situation data output from the controller, the external memory card being collected for re-analysis after being collected in the field to be used as a recovery measure of the size and damage of the earthquake after the end of the situation; A data output unit having analog and digital output modes to observe data output from the control unit in a control room in association with SCADA (Supervisory Control And Data Acquisition); And an input / output communication module for outputting a signal output from the data output unit to an external device via an input / output terminal.

The card reader may further include a card reader that reads an external memory card collected at a site, utilizes an analysis program, and reproduces a situation value through graph analysis of the collected data and data DB.

In addition, as a separate communication port connected to the data output unit further includes an RS-232C port for smoothly connecting various information inside the device with an external computer system.

The apparatus may further include a noise filter for removing noise accompanying the values sent to the external memory card.

The analog output mode of the data output unit transmits the maximum acceleration and the SI value at 4-20 mA. The data output unit has two analog output ports for outputting maximum ground acceleration and SI values, and three digital output ports for outputting earthquake alarms, manual shutdown, and self-diagnosis signals. The digital output mode of the data output unit transmits an earthquake alarm in case of an earthquake and a failure state in a self-diagnosis to an on / off contact point.

The earthquake situation data stored in the external memory card is preferably earthquake situation data from 50 seconds to 100 seconds before the trigger mode, and more preferably, the controller is a micro-processor.

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

1 is a control block diagram of a seismic wave receiving apparatus according to the present invention, and FIG. 2 is an interconnection diagram of a seismic wave receiving apparatus according to the present invention.

As shown, the present invention is an input and output communication module 21 for inputting a signal output from the seismic wave detection device into the device via the input and output terminal 20; A band pass filter 22 for appropriately processing signals input from the input / output communication module 21 to remove various noises, analyzing the frequency components and waveforms, and selecting only necessary signals having a set bandwidth; After receiving the signal from the band pass filter 22 and processing it, and outputs it to the data output unit 31, and performs algorithms such as overall control of each function and assignment of variables, storage, recording control, management function, operation, etc. , SI and acceleration calculation module 24 for calculating SI and maximum ground acceleration values, and shock and seismic discrimination ability by frequency analysis when a value higher than a preset alarm value is input. In order to maintain stable operation and reliability, at least one self-diagnosis function is performed at the first power-on in order to maintain stable operation and reliability. A control unit 23 including a self-diagnosis module 25 for transmitting the result to the RTU when detected; Graphics on the three axes, maximum ground acceleration value, so as to monitor the operation of various site information and functions such as earthquake or normal ground acceleration generated in the field under the control of the control unit 23, An LCD display 28 for displaying the speed response spectrum and the SI value; Input the various damping factors (earthquake alarm time point, self-diagnosis period, SI value) required for the operation to the control unit 23, and adjust the zero point of the seismic wave detection device on the surface of the LCD display unit 28 A touch screen input unit 29 configured; Alarm means (30) for outputting an alarm by a siren when a value equal to or greater than a threshold value set by the controller (23) is detected; An external memory card 36, which is a storage medium for storing the earthquake situation data output from the control unit 23, is stored for re-analysis after being collected in the field to be used as a recovery measure of the size and damage of the earthquake after the end of the situation. ); A data output unit 31 having analog and digital output modes so that data output from the control unit 23 can be observed in a control room in association with SCADA (Supervisory Control And Data Acquisition); An input / output communication module 32 for outputting a signal output from the data output unit 31 to an external device via an input / output terminal 33; A card reader 37 that reads the external memory card 36 collected in the field and utilizes an analysis program to reproduce the situation value through graph analysis of the collected data and DB of the data; RS-232C port 34 for smoothly connecting various information inside the device as an external communication port and an external computer system; And a noise filter 35 for removing noise accompanying the values sent to the external memory card 36. The analog output mode of the data output unit 31 transmits the maximum acceleration and the SI value at 4-20 mA. The data output unit 31 has two analog output ports for outputting maximum ground acceleration and SI value, and three digital output ports for outputting earthquake alarm, manual shutdown, and self-diagnosis signals. Digital output mode transmits earthquake alarm in case of earthquake and failure situation in self-diagnosis to on / off contact point.

Earthquake situation data stored in the external memory card 36 is earthquake situation data from 50 seconds to 100 seconds before the trigger mode, the control unit 23 is composed of a micro-processor (Micro-Processor).

3 and 4 illustrate the external structure of the present invention. In general, the material is made of aluminum, and an LCD panel and an external memory card are mounted on a front surface thereof, and a plurality of connection connectors and a power connector are mounted on the bottom thereof. In addition, the rear side is formed with a heat dissipation device (not shown) such as a cooling fan for cooling is fixed to the wall.

5 is a graph showing a comparison of acceleration vertical components of measurement points of the present invention, FIG. 6 is a graph showing the vector synthesis acceleration and the SI value of the present invention, and FIG. 7 is a view showing the seismic data management state of the present invention on a monitor screen. to be.

Referring to the operation of the present invention configured in this way in more detail as follows.

First, the input / output communication module 21 of the present invention inputs a signal output from the seismic wave sensing device into the device via the input / output terminal 20. The bandpass filter 22 appropriately processes signals input from the input / output communication module 21 to remove various noises, analyzes frequency components and waveforms thereof, and selects only necessary signals having a set bandwidth.

Thereafter, the control unit 23 performs algorithms such as control of each function and substitution of variables, storage, recording control, management functions, and calculations, and the SI and acceleration calculation module 24 obtains SI and maximum ground acceleration values. The trigger module 26 has a shock and seismic identification capability by frequency analysis when a value equal to or greater than a preset alarm value is input. The trigger module 26 stores these values in an internal or external memory 27 or 36, and the self-diagnosis module 25. In order to maintain stable operation and reliability, it performs the self-diagnosis function at least once when the power is turned on to check the function of the internal device, and transmits the result to the RTU when a failure or malfunction is detected.

In addition, the LCD display unit 28 is a graphic for the three axes, the maximum ground acceleration value, so as to monitor the operation of various operational information and functions of the site, such as the value of earthquake or normal ground acceleration occurring in the field, The speed response spectrum and the SI value are displayed, and the touch screen input unit 29 configured on the surface of the LCD display 28 inputs various damping factors (earthquake alarm time point, self-diagnosis period, SI value) necessary for operation. , Adjust the zero point of the seismic wave detection device.

The alarm means 30 outputs an alarm by a siren when a value equal to or greater than a predetermined threshold value is detected, and the external memory card 36 is a storage medium for storing earthquake situation data. To be used, it is collected in the field and kept for re-analysis, but the seismic situation data stored here is the seismic situation data from 50 seconds before the trigger mode to 100 seconds later. The noise filter 35 removes noise accompanying the values sent to the external memory card 36.

The data output unit 31 has analog and digital output modes that can be observed in the control room in connection with SCADA (Supervisory Control And Data Acquisition). In particular, the analog output mode transmits the maximum acceleration and the SI value at 4-20 mA. The data output unit 31 has two analog output ports for outputting maximum ground acceleration and SI values, and three digital output ports for outputting earthquake alarms, manual shutdown, and self-diagnosis signals. The output mode transmits earthquake alarms in case of an earthquake and the occurrence of faults in self-diagnosis to on / off contacts.

The input / output communication module 32 outputs the signal output from the data output unit 31 to an external device via the input / output terminal 33, and the card reader 37 reads the external memory card 36 collected in the field. In-situ program is used to reproduce the site situation values through graph analysis of collected data and DB of data. In addition, the RS-232C port 34 is a separate communication port for smoothly connecting various types of information inside the device with an external computer system.

Here, the response spectrum is used in the present invention in order to know the effect of the seismic waves on the structure, in particular, the response spectrum shows the effect on the structure represented by a single quality system. In particular, the velocity response spectrum indicates the maximum energy that the ground vibrations have on the structure. For example, if the spring constant of a structure such as a gas supply base is k and the maximum displacement from an earthquake is x _max , the maximum strain energy per unit mass is 1/2 · k / mx _max ² , which is 1 / 2 (w x _max) ² is obtained. In other words, it is 1/2 · S _v ² . This S _v is the velocity response spectrum.

There are many cycles of ground structures and their members, and their local cycles change when local destruction occurs. However, for structures with some stiffness, the main member is at approximately 0.1 to 2.5 (sec), so the integral value represents the sum of the energy between them. By using, it is used as an index indicating the destructive force of the earthquake, and this is called spectral intensity.

Therefore, in the present invention, by realizing the speed spectrum and SI value in real-time to display through the output device of the field and to transmit to the control station, it is possible to know the destructive force of the earthquake at the site and control station at the same time and prompt response accordingly Done.

In addition, as described above, the present invention stores the information of the earthquake received from the seismic wave sensing device in the built-in expansion memory card, analyzes the transmitted acceleration data of the ground, and applies the ground management station during the ground vibration applied to the supply management station. After filtering only the seismic wave components in the weak natural frequency band, vector synthesis of horizontal two components (north-south, east-west direction) and vertical one component is performed to calculate the maximum ground acceleration. It transmits to the RTU at the static pressure base so that it can be transferred to the local control station.It has an LCD panel to check the behavior of the earthquake in the event of an earthquake, and a touch screen to set various parameters for self-diagnosis and operation. It is available.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are intended to fall within the scope of the appended claims.

As described above, according to the present invention, the ground station supply management station stores the information of the earthquake received from the seismic wave detection device in the built-in expansion memory card, analyzes the transmitted acceleration data of the ground and applies it to the supply station. Filter the seismic wave components of the most vulnerable natural frequency band, and then calculate the maximum ground acceleration by vector-synthesizing two horizontal components (North-North and East-West) and one vertical direction. It is converted to ~ 20mA and transmitted to RTU at the static pressure base so that it can be transmitted to the local control center.It has an LCD panel to check the behavior of the earthquake in the event of an earthquake, and touch to set various parameters necessary for self-diagnosis and operation. Screen input function allows signal passband to be tailored By inputting the seismic wave, it is possible to calculate the strength and SI value of the seismic wave in the band near the natural frequency of the supply station, and to analyze the damage degree of the supply station quickly and accurately. However, there is a wide variety of effects that can be stored semi-permanently and later analyzed more precisely through the card reader.

Claims (9)

An input / output communication module 21 for inputting a signal output from the seismic wave detection device into the device via the input / output terminal 20; A band pass filter 22 for appropriately processing signals input from the input / output communication module 21 to remove various noises, analyzing the frequency components and waveforms, and selecting only necessary signals having a set bandwidth; After receiving the signal from the band pass filter 22 and processing it, and outputs it to the data output unit 31, and performs algorithms such as overall control of each function and assignment of variables, storage, recording control, management function, operation, etc. , SI and acceleration calculation module 24 for calculating SI and maximum ground acceleration values, and shock and seismic discrimination ability by frequency analysis when a value higher than a preset alarm value is input. In order to maintain stable operation and reliability, at least one self-diagnosis function is performed at the first power-on in order to maintain stable operation and reliability. A control unit 23 including a self-diagnosis module 25 for transmitting the result to the RTU when detected; Graphics on the three axes, maximum ground acceleration value, so as to monitor the operation of various site information and functions such as earthquake or normal ground acceleration generated in the field under the control of the control unit 23, An LCD display 28 for displaying the speed response spectrum and the SI value; Input the various damping factors (earthquake alarm time point, self-diagnosis period, SI value) required for the operation to the control unit 23, and adjust the zero point of the seismic wave detection device on the surface of the LCD display unit 28 A touch screen input unit 29 configured; Alarm means (30) for outputting an alarm by a siren when a value equal to or greater than a threshold value set by the controller (23) is detected; An external memory card 36, which is a storage medium for storing the earthquake situation data output from the control unit 23, is stored for re-analysis after being collected in the field to be used as a recovery measure of the size and damage of the earthquake after the end of the situation. ); A data output unit 31 having analog and digital output modes so that the data output from the control unit 23 can be observed in a control room in association with SCADA; And an input / output communication module (32) for outputting the signal output from the data output unit (31) to an external device via the input / output terminal (33). The apparatus of claim 1, further comprising a card reader (37) which reads the external memory card (36) collected in the field and utilizes an analysis program to reproduce the site situation value through graph analysis of the collected data and DB of the data. Seismic wave receiving device, characterized in that. The method of claim 1, The seismic wave receiving apparatus further comprises an RS-232C port 34 for smoothly connecting various information inside the device with an external computer system as a separate communication port connected to the data output unit 31. An apparatus according to claim 1, further comprising a noise filter (35) for removing noise accompanying the values sent to said external memory card (36). 2. The seismic wave receiving apparatus according to claim 1, wherein the analog output mode of the data output unit (31) transmits the maximum acceleration and the SI value at 4-20 mA. 2. The data output unit (31) according to claim 1, wherein the data output unit (31) includes two analog output ports for outputting maximum ground acceleration and SI values, and three digital output ports for outputting earthquake alarms, manual shutdown, and self-diagnosis signals. Seismic wave receiving device characterized in that it has a. 7. The seismic wave receiving apparatus according to claim 6, wherein the digital output mode of the data output unit (31) transmits an earthquake alarm upon occurrence of an earthquake and an occurrence of a failure upon self-diagnosis to an on / off contact point. 2. The seismic wave receiving apparatus according to claim 1, wherein the seismic situation data stored in the external memory card (36) is seismic situation data from 50 seconds to 100 seconds before the trigger mode. The seismic wave receiving apparatus according to claim 1, wherein the control unit is a microprocessor.