CN110596753A - Earthquake monitoring system and method for research pile - Google Patents
Earthquake monitoring system and method for research pile Download PDFInfo
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- CN110596753A CN110596753A CN201910886353.9A CN201910886353A CN110596753A CN 110596753 A CN110596753 A CN 110596753A CN 201910886353 A CN201910886353 A CN 201910886353A CN 110596753 A CN110596753 A CN 110596753A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/223—Radioseismic systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/307—Analysis for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The invention discloses an earthquake monitoring system and method for a research pile, aiming at the earthquake monitoring and alarming of the research pile, on the premise of ensuring normal earthquake monitoring and alarming, a simplified and efficient alarm signal is sent to a main control room of the research pile to remind an operator to take emergency measures after an alarm condition is met according to a true and false earthquake distinguishing result, so that frequent false earthquake alarming caused by engineering construction and the like is reduced, the safety pressure of false earthquake alarming on operators is reduced, the unplanned pile stopping probability caused by false earthquake is reduced, and the operability of the research pile is improved.
Description
Technical Field
The invention relates to the field of earthquake monitoring and alarming, in particular to an earthquake monitoring system and method for a research pile.
Background
The prior domestic nuclear facility earthquake monitoring system generally monitors earthquake intensity and measures earthquake acceleration value, when different thresholds are reached, alarm signals of different levels are sent to a control room, construction of newly building or dismantling a project site where a research pile is located is frequent, various engineering mechanical vibration and engineering blasting easily cause the earthquake monitoring system to trigger false earthquake alarm, frequent earthquake event alarm aggravates the operating pressure of an operator, false alarm of the earthquake monitoring system also influences the response time of the main control room operator to rapidly take measures for ensuring that the reactor is controlled in a safe state under the real earthquake working condition, and unnecessary shutdown and economic loss can be brought to the research pile. In view of the fact that seismic monitoring alarm of a research pile does not need to distinguish seismic event alarm or operation reference seismic alarm or safe pile-stopping seismic alarm, a seismic monitoring system and an alarm method suitable for the research pile are needed.
Disclosure of Invention
The invention aims to provide a system and a method for researching a pile earthquake monitoring system, so as to increase the stability of the earthquake monitoring system and reduce the false alarm probability of the earthquake monitoring system.
In order to achieve the purpose, the invention adopts the technical scheme that: the monitoring cabinet is used for carrying out true and false earthquake analysis and judgment on measuring point acquired data, sending a corresponding alarm signal after meeting an alarm sending condition and displaying a corresponding intensity value to a main control room of the research pile so as to remind an operator to take corresponding measures.
Preferably, the station apparatus comprises:
the accelerometer is used for monitoring and researching seismic oscillation signals at each measuring point in the reactor in real time and transmitting the signals to the recorder for numerical processing;
the recorder is used for receiving the seismic oscillation signal of the accelerometer, carrying out early-stage numerical processing on the signal and transmitting the signal to the monitoring cabinet;
the shielding box body is used for increasing the reliability of the accelerometer and the recorder in a field monitoring environment.
Preferably, the monitoring cabinet comprises:
the alarm unit is used for performing numerical processing on the received signals of the plurality of measuring points to obtain information such as signal duration, power spectrum and the like, applying an authenticity earthquake identification calculation algorithm, performing logic judgment according to the algorithm and giving a hard-wired passive alarm contact;
the signal post-processing unit is used for sending out an external triggering network signal of the earthquake motion signal, storing the signal for a long time, and directly printing a preset earthquake key information speed report after triggering the safe shutdown signal;
correspondingly, the invention provides a monitoring and alarming method for studying earthquake of a pile, which comprises the following steps:
step S1: carrying out true and false earthquake identification on three factors of the amplitude, the frequency spectrum and the duration of earthquake motion monitored by the accelerometer;
step S2: when the earthquake intensity grade is judged to be larger than or equal to V, the monitoring cabinet sends two paths of alarm signals in different forms to the main control room so as to remind an operator to take corresponding measures;
when the accelerometer monitors that the signals simultaneously satisfy the following 3 conditions, the signals are judged to be seismic signals, otherwise, the signals are non-seismic signals, and the three conditions are respectively as follows: (1) the multiple accelerometers all have signals in the X, Y or Z directions at the same time and are all larger than the sampling trigger value (set to 0.01 g). (2) The signal duration of the plurality of accelerometers is greater than 5 s. (3) The energy of the power spectrum of the signals of the free-field accelerometer in the X direction, the Y direction or the Z direction within the range of 0-10 Hz is greater than or equal to 50% of the total energy.
According to the main characteristics of earthquake motion, the earthquake motion can be represented by 3 basic elements of the amplitude, duration and spectral characteristics of the earthquake motion, and various structural seismic damages are the results of the comprehensive influence of the 3 basic elements; the range of the vibration frequency of the earthquake with strong destructiveness is 0.1-12Hz, the duration of the strong earthquake is more than 5s, and the like. In order to reduce the probability of false alarm caused by false earthquake vibration, the following settings are carried out according to theoretical analysis and engineering practice: when the signals measured by all the accelerometers of the research pile exceed the acceleration threshold corresponding to a certain intensity value of the earthquake, the real earthquake with the intensity level exceeding a certain intensity level can be considered to occur. Therefore, the following 3 conditions are set, and when the following 3 conditions are all met, an alarm is triggered and an earthquake intensity value is displayed.
(1) All accelerometers have signals in the X, Y or Z direction at the same time and are all larger than a sampling trigger value (set to be 0.01 g); (2) the signal duration of all accelerometers is more than 5 s; (3) the energy of the power spectrum of the signals in the X direction or the Y direction or the Z direction of the accelerometer with the free field in the low-frequency vibration range of 0Hz to 10Hz is more than or equal to 50 percent of the total energy of all frequency ranges.
Preferably, the step S1 includes:
continuously monitoring the earthquake motion signals by accelerometers arranged at each measuring point of the research pile and transmitting the earthquake motion signals to one-to-one corresponding recorder;
and carrying out numerical processing by a corresponding recorder to obtain seismic signals, transmitting the seismic signals to the monitoring cabinet alarm module, carrying out numerical processing by the monitoring cabinet alarm module to obtain information such as signal duration, power spectrum and the like, and then applying an authenticity seismic identification calculation algorithm to carry out authenticity identification on the seismic signals.
Preferably, the step S2 includes:
and after the earthquake signal is judged to be a real earthquake signal, triggering an alarm when the calculated intensity level is greater than or equal to V, and sending an earthquake alarm signal to the master control room.
A monitoring cabinet alarm module sends a hard-wired passive alarm contact to a main control room to complete lamp ring alarm;
and the signal post-processing unit of the monitoring cabinet receives the signal after the truth identification of the alarm module of the monitoring cabinet and sends a network alarm signal to the main control room to finish the image display of the intensity value.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
the monitoring and alarming system for studying the heap earthquake provided by the invention reduces the probability of false earthquake triggering false alarm by continuously monitoring earthquake motion signals and applying a true and false earthquake discrimination algorithm according to key information such as acceleration values, duration time, power spectrums and the like of the acquired earthquake motion signals, improves an alarming mode, triggers the alarm only when the earthquake intensity is greater than or equal to V, and improves the reliability of receiving the earthquake alarming signals by a main control room by adopting different alarming forms; when the local vibration signal is judged to be a pseudo seismic signal, the signal is only recorded; the local vibration signal is judged to be a real seismic signal but not more than or equal to the seismic intensity grade V, only the network signal is sent to the main control room to display the seismic intensity grade value, no sound and light alarm signal is sent to the main control room, and finally reliable and efficient alarm in the main control room is realized, the operating pressure of an operator is reduced, and unnecessary shutdown and economic loss caused by false alarm to research pile are avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic diagram of a seismic monitoring alarm system for a research stack according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a seismic monitoring alarm system for a research stack according to a second embodiment of the present invention;
FIG. 3 is a flow chart of the seismic surveillance alarm method of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
FIG. 1 is a schematic diagram of a seismic monitoring alarm system for a research stack according to a first embodiment of the present invention. As shown in FIG. 1, the earthquake monitoring and alarming system for the research pile comprises a plurality of measuring point devices 1-n of the research pile and a monitoring cabinet 2 connected with the plurality of recorders, wherein n is a natural number greater than 1, and further, in practical application, n is 6, namely, comprises 6 measuring point devices. In an embodiment of the invention, the plurality of measuring point devices 1-n are used for continuously monitoring and researching seismic motion signals of each measuring point in the pile, the measuring point devices process the signals and transmit the signals to the monitoring cabinet 2, the monitoring cabinet 2 carries out true and false seismic recognition, and when the signals are confirmed to be real seismic signals and the seismic intensity value is greater than or equal to V, different forms of seismic alarm signals are sent to the main control room 3 to remind an operator to take corresponding measures.
Specifically, the accelerometer continuously monitors earthquake motion signals, sends the earthquake motion signals to the monitoring cabinet 2, the monitoring cabinet 2 performs numerical processing and true and false earthquake identification, calculates earthquake intensity grade after the real earthquake is judged, sends passive contact signals to the main control room 3 to realize acousto-optic alarm when the earthquake intensity grade is larger than or equal to V, and simultaneously sends network signals to the main control room 3 to realize earthquake intensity value display alarm by the monitoring cabinet 2.
The earthquake monitoring and alarming system for research pile provided by the embodiment can distinguish true and false earthquake of monitoring signals, calculate corresponding earthquake intensity grade after judging as real earthquake signals, and send two paths of alarm signals with different forms to the master control room when the earthquake intensity grade is greater than or equal to V, so that the interference of the false earthquake alarm signals to a master control room operator is reduced, the signal receiving reliability and efficiency of the master control room operator during earthquake alarming are improved, and unnecessary pile stopping and economic loss brought to research pile by false alarm are avoided.
The false earthquake discrimination algorithm is applied to reduce the probability of triggering false alarm by false earthquake, the alarm signal is sent only when the calculated true earthquake intensity grade is greater than or equal to V, the reliability of the main control room for receiving the earthquake alarm signal is improved by adopting different alarm forms, the reliable and efficient alarm in the main control room is finally realized, the operation pressure of an operator is reduced, and unnecessary shutdown and economic loss caused by the false alarm to research pile are also avoided.
Example two
There is shown a schematic diagram of a seismic surveillance alarm system for a research stack according to a first embodiment of the invention. As shown in figure 1 of the drawings, in which,
in order to realize the in-situ monitoring and storage of the seismic signals of each seismic monitoring point, in the embodiment, the data acquisition instrument and the accelerometer are arranged together, so that the seismic signals can be processed and recorded by numerical values in addition to the reference events. Specifically, the accelerometers 1 to 6 are used for continuously monitoring seismic signals, and the recorders 1 to 6 connected to the accelerometers perform numerical processing such as filtering on the seismic signals to obtain the seismic signals, and transmit the seismic signals to the monitoring cabinet 3.
As shown in fig. 2, in this embodiment, the monitoring cabinet 3 includes an alarm unit 3-1 and a signal post-processing unit 3-2, and the main control room 4 includes an audible and visual alarm 4-1 and an information display 4-2.
Further, the alarm unit 3-1 performs numerical calculation and true-false earthquake recognition, calculates earthquake intensity value for the earthquake signal after confirming as a real earthquake signal, and immediately sends a hard-wired passive contact signal for triggering the main control room 4 acousto-optic alarm 4-1 when the earthquake intensity value is greater than or equal to V.
Further, after the signal post-processing unit 3-2 is judged to be triggered by the real earthquake signal by the alarm unit 3-1, when the earthquake intensity value is greater than or equal to V, the earthquake intensity value network signal for the information display 4-2 of the main control room 4 is immediately sent. Therefore, an operator in the main control room can immediately acquire the current real earthquake according to the sound-light alarm signal and the intensity value display signal, and can know the current maximum intensity value so as to take corresponding measures.
Further, when the signal monitored by the measuring point equipment is judged to be a pseudo seismic signal by the alarm unit, the signal is only recorded; when the earthquake intensity level is judged to be true, but not more than or equal to the earthquake intensity level V, the network signal is only sent to the main control room to display the earthquake intensity level value, and the acousto-optic alarm signal is not sent to the main control room, so that the operation pressure of an operator is reduced, and unnecessary economic loss caused by pile fault shutdown due to false alarm is avoided.
EXAMPLE III
FIG. 3 is a flow chart of a method of providing a seismic surveillance alarm system for a research stack according to a third embodiment of the invention. As shown in FIG. 3, the monitoring and alarming method for the earthquake of the research pile provided by the invention comprises the following steps:
step S1: and continuously monitoring seismic signals of corresponding areas in the research pile by a plurality of accelerometers, and transmitting the seismic signals to a monitoring cabinet.
Step S2: after the monitoring cabinet connected with the recorder judges whether the earthquake signals are true or false, if the earthquake signals are true earthquake signals and the calculated earthquake intensity value is greater than or equal to V, different forms of alarm signals are sent to the main control room to remind an operator to take corresponding measures; and when the earthquake intensity level is judged to be true, the sound-light alarm signal is not sent to the master control room, the network signal is only sent to the master control room to display the earthquake intensity level value, and if the earthquake intensity level is a false earthquake signal, the master control room is not required to send any signal.
Specifically, step S2 includes:
step S21: and (3) performing true and false earthquake identification by the monitoring cabinet alarm unit, if the following 3 criteria are simultaneously met, judging the earthquake signals, and if 1 criterion is not met, judging the earthquake signals to be non-earthquake signals.
(1) The 6 accelerometers all have signals in the X, Y or Z directions at the same time and are all larger than the sampling trigger value (set to 0.01 g).
(2) The signal duration of the plurality of accelerometers is greater than 5 s.
(3) The energy of a power spectrum of a signal of the free-field accelerometer in the X direction, the Y direction or the Z direction within the range of 0-10 Hz is more than or equal to 50% of the total energy;
step S22: if the earthquake signal is a real earthquake signal, calculating an earthquake intensity value of the earthquake signal, immediately sending a hard-wired passive contact signal for triggering the acousto-optic alarm of the master control room when the earthquake intensity value is greater than or equal to V, and immediately sending an earthquake intensity value network signal for displaying 4-2 information in the master control room 4 after the signal post-processing unit is judged to be triggered by the real earthquake signal by the alarm unit.
Step S23: if the earthquake intensity value is a real earthquake intensity signal, only sending a network signal to the master control room to display the earthquake intensity grade value when the earthquake intensity value is smaller than V.
Step S24: if the signal is determined to be a pseudo seismic signal by S21, no signal is sent to the main control room.
Advantageously, the application of the algorithm can reduce the interference of the environment unreal to the seismic signals to the monitoring of the seismic instrument, and can reduce the probability of false earthquake alarm.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A seismic monitoring system for a research pile, the system comprising:
the monitoring equipment cabinet is arranged in each area in the research pile and is connected with the plurality of measuring point devices, the monitoring equipment cabinet analyzes and judges the truth of the earthquake based on the data collected by the measuring point devices, and when the earthquake is judged to be a real earthquake and meets the alarm sending condition, a corresponding alarm signal is sent out, and the corresponding earthquake intensity value is displayed to a main control room of the research pile.
2. The seismic monitoring system for a research pile of claim 1, wherein the station apparatus comprises:
the accelerometer is used for monitoring and researching seismic oscillation signals at a survey point in the reactor in real time and transmitting the signals to the recorder for numerical processing;
the recorder is used for receiving the seismic oscillation signal of the accelerometer, carrying out early-stage numerical processing on the signal and transmitting the signal to the monitoring cabinet;
the shielding box body, the accelerometer and the recorder are arranged in the shielding box body.
3. The seismic monitoring system for a research pile of claim 1, wherein the monitoring cabinet comprises:
the alarm unit is used for carrying out numerical processing on the received measuring point signals to obtain signal duration time and power spectrum information, carrying out logic judgment by applying an true and false earthquake identification calculation algorithm based on the obtained signal duration time and power spectrum information, judging whether the earthquake is true or not and providing a hard-wired passive alarm contact;
and the signal post-processing unit is used for sending the external triggering network signal of the earthquake motion signal, storing the signal for a long time, and printing a preset earthquake key information report after triggering the safe shutdown signal.
4. The seismic monitoring system for studying a pile of claim 2, wherein the monitoring cabinet performs true and false seismic identification on three elements of amplitude, frequency spectrum and duration of the seismic signals monitored by the accelerometer; and when the earthquake intensity grade is judged to be greater than or equal to V, the monitoring cabinet sends two paths of alarm signals in different forms to the main control room.
5. The seismic monitoring system for studying a pile of claim 4, wherein the signal monitored by the accelerometer is determined to be a true seismic signal when the following 3 conditions are simultaneously met, and is determined to be a non-true seismic signal when the signal monitored by the accelerometer is not met, and the three conditions are respectively: (1) all the accelerometers have signals in the X direction, the Y direction or the Z direction at the same time, and the signals are all larger than a sampling trigger value; (2) the signal duration of all accelerometers is more than 5 s; (3) the energy of the power spectrum of the signals in the X direction or the Y direction or the Z direction of the accelerometer with the free field in the low-frequency vibration range of 0Hz to 10Hz is more than or equal to 50 percent of the total energy of all frequencies.
6. A seismic monitoring method based on the seismic monitoring system for a research pile of any one of claims 1-4, characterized in that the method comprises:
step S1: carrying out true and false earthquake identification on three factors of the amplitude, the frequency spectrum and the duration of earthquake motion monitored by the measuring point equipment;
step S2: when the earthquake intensity grade is judged to be greater than or equal to V, the monitoring cabinet sends two paths of alarm signals in different forms to the main control room; when the signal monitored by the measuring point equipment simultaneously meets the following 3 conditions, the signal is judged to be a real seismic signal, otherwise, the signal is a non-real seismic signal, and the three conditions are respectively as follows: (1) all the accelerometers have signals in the X direction, the Y direction or the Z direction at the same time, and the signals are all larger than a sampling trigger value; (2) the signal duration of all accelerometers is more than 5 s; (3) the energy of the power spectrum of the signals in the X direction or the Y direction or the Z direction of the accelerometer with the free field in the low-frequency vibration range of 0Hz to 10Hz is more than or equal to 50 percent of the total energy of all frequencies.
7. The seismic monitoring method for studying a pile of claim 6, wherein said step S1 includes:
continuously monitoring earthquake motion signals by accelerometers arranged at each measuring point of the research pile and transmitting the earthquake motion signals to one-to-one corresponding recorder;
and carrying out numerical processing by a corresponding recorder to obtain earthquake motion signals, transmitting the earthquake motion signals to the monitoring cabinet alarm module, carrying out numerical processing by the monitoring cabinet alarm module to obtain signal duration time and power spectrum information, and carrying out true and false identification on the earthquake motion signals by applying a true and false earthquake identification calculation algorithm based on the signal duration time and the power spectrum information.
8. The seismic monitoring method for studying a pile of claim 6, wherein said step S2 includes:
triggering an alarm when the calculated base intensity grade is greater than or equal to V after the earthquake signal is judged to be a real earthquake signal, and sending an earthquake alarm signal to a master control room;
a monitoring cabinet alarm module sends a hard-wired passive alarm contact to a main control room to complete lamp ring alarm;
and the signal post-processing unit of the monitoring cabinet receives the signal after the true and false identification of the alarm module of the monitoring cabinet and sends a network alarm signal to the main control room to finish the image display of the intensity value of the base.
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| CN201910886353.9A CN110596753A (en) | 2019-09-19 | 2019-09-19 | Earthquake monitoring system and method for research pile |
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| CN201910886353.9A CN110596753A (en) | 2019-09-19 | 2019-09-19 | Earthquake monitoring system and method for research pile |
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| CN110596753A true CN110596753A (en) | 2019-12-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882087A (en) * | 2020-11-03 | 2021-06-01 | 武汉地震科学仪器研究院有限公司 | Nuclear power plant earthquake shutdown protection system and method and nuclear power plant shutdown control system |
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2019
- 2019-09-19 CN CN201910886353.9A patent/CN110596753A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882087A (en) * | 2020-11-03 | 2021-06-01 | 武汉地震科学仪器研究院有限公司 | Nuclear power plant earthquake shutdown protection system and method and nuclear power plant shutdown control system |
| CN112882087B (en) * | 2020-11-03 | 2024-02-20 | 武汉地震科学仪器研究院有限公司 | Nuclear power plant earthquake shutdown protection system, method and nuclear power plant shutdown control system |
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Application publication date: 20191220 |