CN112327351A - Seismometer anti-vibration device - Google Patents
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Abstract
The invention discloses a seismometer shockproof device which comprises a seismometer, wherein a base surface of the seismometer is fixedly connected with a protective cover, four base blocks are fixedly connected with a base surface positioned in the protective cover in an all-annular array mode, a seismometer is arranged on a base surface positioned between the four base blocks, a limiting plate is fixedly connected with the base surface of each base block, four connecting plates are fixedly connected with the outer wall of the seismometer in an all-annular array mode, limiting columns are fixedly connected to the side walls of the connecting plates, limiting holes are formed in the side walls of the connecting plates, and supporting legs are fixedly arranged at the bottom of the seismometer. The invention solves the problem that the seismometer system can not normally operate after being subjected to a large earthquake under the conditions of obvious displacement, jumping and even subversion of the seismometer when the large earthquake occurs.
Description
Technical Field
The invention relates to the technical field of earthquake monitoring, in particular to a seismometer anti-vibration device.
Background
The earthquake station is an important place for carrying out monitoring work and is a basic unit for earthquake monitoring, early warning, prediction and forecast. Development of standardization and normalization of station appearance and internal design is an important content for construction of standardized seismograph stations, and has very important practical significance for promoting informatization and modernization of earthquake-proof and disaster-reduction services (Shouwu et al, 2019). The standard construction of the station puts forward the requirements of instrument shockproof reinforcement, comprehensive wiring specification and clear identification mark, and the shockproof reinforcement of the seismic instrument is one of important contents. The earthquake station standardized standard design atlas (revision draft) provides that a fixing device is scientifically added to earthquake monitoring professional equipment (such as a sensor or an observation device, a data acquisition unit and the like) according to requirements, so that the phenomenon that the equipment topples and falls due to a major earthquake or other reasons, and the aftershock monitoring and earthquake situation monitoring work after the earthquake is seriously influenced is avoided.
The instrument shockproof reinforcement is a necessary measure for ensuring that the station instrument normally carries out monitoring work, in particular to a near-field station in a high-intensity area or a potential earthquake source area with large earthquake and strong earthquake, and the earthquake observation instrument is necessary to have shockproof capability. Through earlier investigations, Wenchuan M8.0 level earthquake caused significant displacement of seismometers of more than 4 stations in 7 stations of the seismic area purple plateau berth net (Hanjin, 2009). A scientific exploration array of the China earthquake local sphere physical research institute is provided with a special anti-vibration reinforcing device for a CMG-3ESP seismograph in the special item of fracture earthquake monitoring of the small river in Yunnan. The earthquake gauges of Guralp company, UK and nanomtics company in America all design a sealing cover with the functions of shock resistance and airflow disturbance resistance.
For the earthquake sensor in the station observation instrument system, what measures are taken to ensure the normal operation of the station instrument and avoid the condition that the instrument is obviously displaced, jumped or even overturned when the near field of the station generates a large earthquake, so that the seismometer system can still normally operate after the large earthquake, the normal monitoring of the observation instrument on aftershocks and sequences is ensured, and timely useful data is provided for the development and judgment of the following earthquake situation trend.
Disclosure of Invention
The invention aims to solve the problem that a seismometer system cannot normally operate after being subjected to a large earthquake in order to solve the situation that the seismometer obviously displaces, jumps and even overturns when the large earthquake occurs.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a seismometer anti-vibration device, including the earthquake platform, the base face fixedly connected with protection casing of earthquake platform to and be located four base pieces of the equal ring array fixedly connected with of the inside base face of protection casing, and be located four base between the base piece is provided with the seismometer, the base face fixedly connected with limiting plate of base piece, four connecting plates of the equal ring array fixedly connected with of outer wall of seismometer, the spacing post of lateral wall fixedly connected with of connecting plate, spacing hole has been seted up to the lateral wall of connecting plate, the fixed landing leg that is provided with in bottom of seismometer.
Preferably, the top of the shield, and the four side walls are provided with transparent glass.
Preferably, the base block and the seismic table are connected in a 955 structural adhesive fixing mode, a U-shaped opening is formed in the base surface of the base block, and the supporting legs are located on the inner wall of the U-shaped opening.
Preferably, the limiting plate is the L type, and the lateral wall is provided with the scale to and the lateral wall welding of right angle department has the strengthening rib, and the bottom is connected with the base block through 304 stainless steel screws, it has thick 8mm high density matter sponge or the soft material of foam to bond with the qiang di glue between limiting plate and the base block.
Preferably, the limiting column slides through the inner wall of the limiting hole.
Preferably, the top of the connecting plate is a bending device, the bottom of the bending part is connected with the top of the seismometer through 304 stainless steel screws, the side wall of the connecting plate is connected with the outer wall of the seismometer through 304 stainless steel screws, and 8 mm-thick dense sponge or soft foam material is bonded between the connecting plate and the seismometer through Kendy glue.
Compared with the prior art, the invention has the following beneficial effects: the seismometer shockproof device is suitable for the protection device which can protect the seismometer from the situations of obvious displacement, jumping and even overturn when the seismometer instrument of the seismic station generates strong shock and large earthquake in the near field and ensures the normal operation of the seismometer instrument of the seismic station.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic top view of a base block according to the present invention;
fig. 3 is a front view of the limiting plate of the invention;
FIG. 4 is a front view of the connection plate of the present invention;
FIG. 5 is a graph of the correlation coefficient for Indonesia 6.8 seismometer 1 and seismometer 2 of the present invention for vertical recording events;
FIG. 6 is a schematic of the MISFIT results recorded for a quiet time period for seismometer 1 and seismometer 2 of the present invention oriented vertically;
FIG. 7 is a schematic illustration of MISFIT results recorded vertically for seismometer 1 and seismometer 2 in a Jining earthquake in accordance with the present invention;
FIG. 8 is a schematic diagram of MISFIT results recorded vertically for seismometer 1 and seismometer 2 in Indonesia 6.8 grade earthquake of the present invention.
In the figure: 1-an earthquake table, 2-a protective cover, 3-a base block, 4-an earthquake gauge, 5-a limiting plate, 6-a connecting plate, 7-a limiting column, 8-a limiting hole, 9-a supporting leg and 10-a U-shaped opening.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 8. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1:
the utility model provides a seismometer anti-vibration device, including seismic station 1, the base face fixedly connected with protection casing 2 of seismic station 1 to and be located four base pieces 3 of the equal annular array fixedly connected with of the base face of protection casing 2 inside, and be located four base between the base piece 3 is provided with seismometer 4, the base face fixedly connected with limiting plate 5 of base piece 3, four connecting plates 6 of the equal annular array fixedly connected with of outer wall of seismometer 4, the spacing post 7 of lateral wall fixedly connected with of connecting plate 6, spacing hole 8 has been seted up to the lateral wall of connecting plate 6, the fixed landing leg 9 that is provided with in bottom of seismometer 4.
The top of the protective cover 2 and the four side walls are provided with transparent glass.
The base block 3 and the seismic table 1 are connected in a 955 structural adhesive fixing mode, a U-shaped opening 10 is formed in the base surface of the base block 3, and the supporting legs 9 are located on the inner wall of the U-shaped opening 10.
Limiting plate 5 is the L type, and the lateral wall is provided with the scale to and the lateral wall welding of right angle department has the strengthening rib, and the bottom is connected with base piece 3 through 304 stainless steel screws, it has thick 8mm high density sponge or foam soft material to bond with the qiaodi glue between limiting plate 5 and the base piece 3, reduces limiting plate 5 and 3 shell wearing and tearing of base piece
The limiting column 7 penetrates through the inner wall of the limiting hole 8 in a sliding mode.
The top of connecting plate 6 is bending device, and the bottom of department of bending is connected with the top of seismometer 4 through 304 stainless steel screws, the lateral wall of connecting plate 6 is connected with the outer wall of seismometer 4 through 304 stainless steel screws, it has 8mm thick high density sponge or foam soft material to bond with the strong dike glue between connecting plate 6 and the seismometer 4, reduces wearing and tearing between connecting plate 6 and the seismometer 4.
Example 2:
earthquake-resistant performance analysis of the seismometer:
when the intensity of the seismic station appears, the seismometer can shift, which is a key problem to be solved by station standardization. The intensity of the seismic table (instrument pier surface) is related to the obtained ground peak acceleration, and the friction problem exists between the placed seismometer and the instrument pier surface due to the self-weight factor. Assuming that the seismometer generates a displacement S on the instrument pier surface, and the displacement is related to the self weight m of the seismometer and the obtained ground peak acceleration a, which is related to the square of the maximum peak frequency f of the passing seismic waves and the maximum amplitude h, the following relational expression is obtained by considering the influence of the coefficient of friction factor between the seismometer and the instrument pier surface ([ de ] valency l.
S＝β·1/(m·A) (1)
Wherein: s is the pier face displacement of the seismometer, and the unit is mm; m seismometer mass, unit g; a is the peak acceleration of seismic wave obtained by the surface of the swing pier in unit cm/s2Or f2Cm; beta is a dimensional coefficient, 0<β<1.0, unit 1/g.f2The empirical value is generally 1/5-1/3.
A0＝δ·A (2)
Wherein: a. the0Displacement of seismometer obtaining peak maximum acceleration in cm/s2Or gal; and delta is a dimensionless coefficient and is a friction coefficient between a concrete surface and a metal surface, and the value of delta is 0.15-0.69.
A seismometer of an observation field in a large intensity area needs to be additionally provided with a shockproof device, a seismometer harbor shock BBVS series and CMG-3ESP series of China monitoring station network operation are selected for carrying out a vibration table test, a corresponding seismometer is placed on a three-axis vibration table, the shockproof device is additionally arranged, and a seismic performance test and a seismometer displacement test during vibration table and input simulation earthquake are carried out.
Testing on a vibration table:
and (3) test environment: the test equipment is a three-axis vibration table with the model number of 3ES-20, the size of the table top of 600mm x 600mm and the mass of 100kg, and the table top can bear the most load100kg of heavy load, 20kN of single-term sine rated exciting force and three-axis no-load maximum acceleration Amax120m/s2Three-axis no-load maximum speed Vmax1.2m/s, three-axis no-load maximum displacement Dmax±1.2m/s。
According to the previous investigation and analysis, the shockproof device test of the experimental design adopts two fixing modes, one is screw fixation, and the other is structural adhesive fixation. The test equipment selects a seismometer BBVS series and a CMG-3ESP series of the monitoring station network running in China to perform tests, and performs the anti-seismic performance test in a screw fixing and structural adhesive fixing mode in sequence. The three-axis vibration table inputs sinusoidal acceleration signals (duration time 1min) with different amplitudes and frequencies (10-20) Hz, the maximum acceleration PGA estimation value is obtained when the seismometer obviously displaces, and the seismometer of the observation field in a large intensity area needs to be additionally provided with a shockproof device.
The earthquake-proof device simulates earthquake waves and earthquake-proof performance test:
according to the characteristics of the existing seismometers of the monitoring station network in China, the construction of station standardization projects is combined, and a vibration-proof device which is convenient to install, stable, reliable, convenient to overhaul and replace is designed for the station standardization project group, so that the normal operation of the seismometers is not influenced. The designed shockproof device is fixed by screws, can be stably fixed on a station swing pier, and the screws need to chisel holes on the swing pier; the other type adopts structural adhesive for fixation, and the structure of the swing pier is not damaged. In the fixed anti-vibration device test, the anti-vibration device and the seismometer are fixedly arranged on a vibration table (as shown in figure 1). The two fixing devices are respectively used for carrying out tests to detect the anti-seismic performance of the anti-seismic device. The test and results are as follows:
selecting a Sichuan Mianzhu platform, 5 and 12 days in 2008, Wenchuan, 8.0-level seismic wave acceleration record, inputting 3 directions, repeating the test for 3 times, and performing PGAmaxEW824cm/s in sequence2；NS622cm/s2；UD802cm/s2Duration 120 s; the maximum amplitude lasts about 20 seconds. Real record PGAmaxThe values are respectively EW842.6cm/s2、NS636.1cm/s2、UD824.5cm/s2The horizontal displacement is more than or equal to 5mm, and the table top intensity is more than or equal to IX (nine degrees). Screw-fixed shock-proof device, BBVS seismometer appeared and moved significantly in 3 times of experimentsIn the middle, 2 times of approaching one component of the anti-vibration device, 1 time of approaching two components, and the recording of the seismometer system is normal; the CMG-3ESP seismometer jumps up and down, 2 times of approaching to a component of the anti-vibration device and 1 time of not approaching, and the seismometer system records normally. The BBVS seismometer obviously moves back and forth in the anti-vibration device, is not close to the anti-vibration device after being shaken, but can be restored after the horizontal bubble excursion of the seismometer on one side for 1 time and zero setting. The CMG-3ESP seismometer has continuous up-and-down jumping and shaking phenomena, no anti-vibration device is close to after the earthquake occurs, and no offset occurs in the middle of the horizontal bubble. The test results are as follows: the seismometer system still normally operates under the installation of the anti-seismic device, and the anti-seismic performance intensity is more than or equal to IX (nine degrees).
The test result shows that the structural adhesive bonding method is suitable for fixed installation of the swing pier type seismometer, the swing pier structure of the instrument cannot be damaged in the installation process, and the structural adhesive is only used according to the technical requirements.
PGA estimation test of displacement of the seismometer:
and placing a BBVS seismometer and a CMG-3ESP seismometer on the vibration table, adding a vibration-proof device to enable the two seismometers to be separated by 10mm, and sequentially carrying out a vibration table test. In each test, a frequency (10-20 Hz) and sinusoidal acceleration signals with different amplitudes (duration time 1min) are sequentially input through an X axis or a Y axis of a vibration table, and a maximum acceleration PGA estimation value is obtained when the seismometer is detected to have obvious displacement. The test data and results are analyzed as in table 1 below.
TABLE 1 BBVS seismometer test data and results
TABLE 2 CMG-3ESP seismometer test data and results
The test shows that: when the PGA of the vibration table of the seismometer is larger than 103.2gal, the intensity of the table is equal to or larger than VII, and the seismometer has obvious displacement and moving phenomena. Referring to the relevant data, when the friction coefficient between the metal and the metal object is 1.0, the friction coefficient between the metal object and the smooth interface of the concrete is 1.15-1.69, but considering the contact between the point and the surface, the minimum friction coefficient is 1.15, and as a result, the minimum PGA value generating significant displacement is 119gal, which is about 120 gal. Therefore, the seismometer of the station in the area with the ground intensity greater than VII degrees needs to be additionally provided with a shockproof device. The station seismometer in the area where the ground intensity VI is less than or equal to I is less than or equal to VII can adopt or not adopt shockproof reinforcement according to the actual conditions and the actual needs of the station, but a safety protection sealing cover with a shockproof function is additionally arranged according to the influence of heat preservation and airflow disturbance resistance.
And (3) observing signal consistency analysis:
in order to further analyze the influence on the record of an observation system after the earthquake-proof device is additionally arranged, a China earthquake bureau Marlingshan platform comparison base is selected as a test field, BBVS series earthquake equipment of a China monitoring station network is selected, 2 sets of seismometer systems and 2 sets of BBVS-60 seismometers which are additionally arranged on the station are arranged, wherein 1 set of BBVS-60 seismometers is not additionally provided with the earthquake-proof device (seismometer 1), the other 1 set of seismometer systems is additionally provided with the earthquake-proof device (seismometer 2), and the collection equipment uniformly uses an EDAS data collector. The shock-proof device is bonded and fixed by adopting 955 structural adhesive method. And carrying out consistency analysis on data records of the two sets of equipment observation systems.
Data analysis the method we take is to calculate the square coherence coefficient C of the two sets of observed recorded dataijI.e. using CijThe correlation degree of recorded signals detected by two sets of observation systems on different frequency points of a frequency domain is described. If C ij1 means that the two signals are linearly and completely correlated; if C ij0 means that the two signals are completely uncorrelated, and the degree of correlation is usually 0 < C under testijInterval change < 1 (Kristekova, M. et al, 2006).
In the period of approximately one month of test operation in 7, 15 to 8, 10 months and 2018 of the Malingshan platform, a recorded near-earthquake record and a recorded far-earthquake record are selected for analysis and processing, and are compared with data results of near-earthquake and far-earthquake recorded by a provincial bureau platform network; the consistency of the recorded data of the near-earthquake and the far-earthquake of two seismometer systems with the anti-earthquake device and without the anti-earthquake device is compared. Selecting ML1.9 grade earthquake (collapse) recorded by 20 points 06 points in 8, 2 and 2 days in 2018 in Shandong Jinzhou in the near earthquake; the remote earthquake is a Indonesia voyama M6.8-level remote earthquake recorded at 19 points on 5 days 8 months 5 days 2018, and MISFIT data processing software is adopted to perform correlation analysis processing (Kristekova, M. et al, 2009.).
As can be seen from FIG. 5, in the recording process of Indonesia 6.8 grade earthquake, the correlation between seismometer 1 and seismometer 2 in the vertical direction is high in the frequency band from 60s to 5Hz, the correlation degree is basically maintained at about 1, and the correlation of the frequency band below 60s is slowly reduced. The same method was used to analyze the ML1.9 grade earthquake in zhou, shandong jining, with the results consistent with the far-quake records.
The square coherence coefficient reflects the degree of correlation between two signals at a certain frequency point, but cannot reflect the difference between the two signals in the time domain, and cannot give a difference between the signals in phase. For this purpose, in 2009, leistekova, m.et al defined MISFIT (Kristekova, m.2009) and given a series of parameters that quantify the signal amplitude and phase differences in the time and frequency domains. Wherein TFEM represents a time-frequency representation envelope error fitting result of two comparison signals, TEM represents a time-frequency representation envelope error fitting result of two comparison signals, FEM represents a frequency-domain time-frequency representation envelope error fitting result of two comparison signals, EM represents a mean value of the time-frequency representation envelope error fitting results of two comparison signals, PM represents a mean value of phase error fitting results of two comparison signals, TFPM represents a time-frequency phase error fitting result of two comparison signals, TPM represents a time-domain phase error fitting result of two comparison signals, and FPM represents a frequency-domain phase error fitting result of two comparison signals (Kristekova, m. et al, 2006).
Fig. 6 shows the results of MISFIT recorded by two seismometers in the quiet period in the vertical direction, and TFEM shows that the time-frequency performance envelope differences recorded by UD of the two seismometers are distributed in all periods, mainly concentrated in the frequency band with the period of more than 50 seconds, and are obvious from the difference of 100 seconds to lower frequency bands, and the maximum difference occurs outside the observation frequency band and is not more than-1%. The TFPM shows that the phase difference of UD direction records of two seismometers is distributed in all time periods, the phase difference is mainly concentrated on a frequency band with the period being more than 1 second, the difference from 2 seconds to lower frequency bands is obvious, and the maximum difference of about + 0.6% appears when the time is close to 5 seconds. The EM value is 0.48% and the PM value is 0.58% and is mainly due to high value pull-up below the 2 second band.
FIG. 7 shows the MISFIT results of the vertical direction near-seismic records of two seismometers, and TFEM shows that the time-frequency representation envelope curve difference of the UD direction records of the two seismometers is relatively obvious in the seismic time period, the main difference is concentrated in the frequency band with the period larger than 50s, and the maximum difference is not more than-1%. The TFPM shows that the phase difference of UD direction records of two seismometers is relatively obvious in the earthquake time period, mainly focuses on the frequency band with the period larger than 1s, and the maximum difference of about-0.3% occurs in 5 seconds. Compared with the quiet time period, the index values of the MISFIT observed at the same location of the near earthquake are relatively low, the floating amplitude is relatively small, the signal-to-noise ratio is improved mainly due to the earthquake event, and the percentage of errors is obviously smaller.
FIG. 8 shows the MISFIT results of the two seismometers for vertical direction far-shock recording, and TFEM shows that the time-frequency representation envelope curve difference of UD direction recordings of the two seismometers is relatively obvious in earthquake time period, and the consistency is very good in observation frequency band. The TFPM shows that the phase difference of UD direction records of two seismometers is relatively obvious in the earthquake time period, mainly focuses on the frequency band with the period larger than 1s, and the maximum difference of about-0.4% occurs in 4 seconds. Compared with a quiet period and a near-earthquake, the MISFIT values observed at the same site of the far-earthquake are better, mainly because the remote low-frequency energy is larger, and the percentage of errors is obviously smaller.
From the frequency domain and time domain analysis of the near-earthquake and far-earthquake recorded data, the seismometer 1 without the shock-proof device and the seismometer 2 with the shock-proof device have good consistency of vertical recording, and meanwhile, the project group also carries out comparative analysis on the two horizontal recording conditions, and the result shows that the system consistency of the seismometer without the shock-proof device and with the shock-proof device is identical to the analysis result of vertical recording, and the system errors are all less than 1%.
Conclusion and discussion:
in a PGA estimation test for testing the performance of the vibration-proof device of the vibrating table, a seismic source signal with a frequency band of 10-20 Hz is selected for development, and in a response test with a frequency band of 1-10 Hz, a project group further perfects a test scheme of the vibration-proof device in subsequent work of station standardization, and develops related work. In the instrument anti-vibration device consistency test data analysis, a square coherence data analysis method is adopted, recorded waveform comparison analysis is mainly carried out through far-vibration recording and near-vibration recording, and simultaneously recorded seismic waveforms in different states after the anti-vibration device is additionally arranged are compared. The result shows that the general operation condition of the seismometer system with the added anti-vibration device and the seismometer system without the added anti-vibration device is normal, the recording signal of the seismometer system is real and smooth, the consistency of the recorded earthquake is good, and the expected requirement is met. And in the subsequent work of the project group, further analyzing the record in the no-earthquake period, carrying out synchronous observation by adopting a plurality of devices, and comparing and analyzing the consistency of the frequency domain observation data and the time domain observation data. The shockproof device is also applied to the standardized construction of station stations in the provincial offices such as Fujian, Chongqing and Anhui. The test shows that the earth surface type observation system has no obvious influence on the operation of the system after the instrument shockproof device is additionally arranged. The anti-vibration device is further perfected and designed in future, so that the anti-vibration device is more practical, flexible and convenient, is suitable for different measurement and observation requirements, is more practical, and is more convenient for installation operation and follow-up operation and maintenance.
When a large earthquake and a strong earthquake occur, when earthquake waves are transmitted to the swing pier of the seismometer arranged on the ground and reach a certain peak acceleration, the large earthquake can cause the ground to generate a high intensity field, so that the seismometer on the swing pier can generate obvious displacement, jump and even overturn conditions, and the recording of the subsequent earthquake is seriously influenced. Therefore, the earthquake-proof device is added to the station seismometer in the area where the ground intensity is greater than VII degrees, so that the seismometer can work normally after a major earthquake, and the earthquake situation monitoring and the trend judgment after the earthquake are significant.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a seismometer seismic isolation device, is including seismic station (1), its characterized in that: base face fixedly connected with protection casing (2) of earthquake platform (1) to and be located four base pieces of equal ring array fixedly connected with of base face of protection casing (2) inside, and be located four base piece (3) of base piece (3) between the base piece is provided with seismometer (4), base face fixedly connected with limiting plate (5) of base piece (3), four connecting plates (6) of the equal ring array fixedly connected with of outer wall of seismometer (4), the spacing post (7) of lateral wall fixedly connected with of connecting plate (6), spacing hole (8) have been seted up to the lateral wall of connecting plate (6), the fixed landing leg (9) that is provided with in bottom of seismometer (4).
2. The seismometer shock mount of claim 1, wherein: the top of the protective cover (2) and the four side walls are provided with transparent glass.
3. The seismometer shock mount of claim 1, wherein: the base block (3) is fixedly connected with the earthquake table (1) in a 955 structural adhesive bonding mode, a U-shaped opening (10) is formed in the base surface of the base block (3), and the supporting legs (9) are located on the inner wall of the U-shaped opening (10).
4. The seismometer shock mount of claim 1, wherein: limiting plate (5) are the L type, and the lateral wall is provided with the scale to and the lateral wall welding of right angle department has the strengthening rib, and the bottom is passed through 304 stainless steel screws and is connected with base piece (3), it has thick 8mm high density sponge or foam soft material to bond with the qiang di glue between limiting plate (5) and base piece (3).
5. The seismometer shock mount of claim 1, wherein: the limiting column (7) penetrates through the inner wall of the limiting hole (8) in a sliding mode.
6. The seismometer shock mount of claim 1, wherein: the top of connecting plate (6) is bending device, and the bottom of department of bending is connected with the top of seismometer (4) through 304 stainless steel screws, the lateral wall of connecting plate (6) is connected with the outer wall of seismometer (4) through 304 stainless steel screws, it has thick 8mm high density sponge or foam soft material to bond with the Qiang Di glue between connecting plate (6) and seismometer (4).
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08233645A (en) * | 1995-02-28 | 1996-09-13 | Tokyo Gas Co Ltd | Seismic device |
| TWI242628B (en) * | 2004-06-04 | 2005-11-01 | Ind Tech Res Inst | Seismic-protection wheel locational anchorage |
| CN2784946Y (en) * | 2005-01-10 | 2006-05-31 | 北京市地震局 | Short period feedback seismograph |
| CN102085833A (en) * | 2011-01-07 | 2011-06-08 | 吴成芳 | Shockproof fixing frame for vehicle-mounted apparatus |
| CN205193289U (en) * | 2015-11-13 | 2016-04-27 | 中国地震局地震预测研究所 | Supporting structure of low temperature floats seismometer |
| CN206378603U (en) * | 2016-12-31 | 2017-08-04 | 苏州微著设备诊断技术有限公司 | Abnormal sound detection device with shockproof function |
| CN108594291A (en) * | 2018-06-22 | 2018-09-28 | 南方科技大学 | Ocean bottom seismograph |
| WO2019242720A1 (en) * | 2018-06-22 | 2019-12-26 | 南方科技大学 | Electromagnetic release device for submarine seismograph, and submarine seismograph |
| CN210347949U (en) * | 2019-10-18 | 2020-04-17 | 张磊 | Seismometer unable adjustment base |
| CN210514641U (en) * | 2019-09-26 | 2020-05-12 | 张磊 | Seismometer fixing device |
-
2020
- 2020-07-08 CN CN202010652850.5A patent/CN112327351B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08233645A (en) * | 1995-02-28 | 1996-09-13 | Tokyo Gas Co Ltd | Seismic device |
| TWI242628B (en) * | 2004-06-04 | 2005-11-01 | Ind Tech Res Inst | Seismic-protection wheel locational anchorage |
| CN2784946Y (en) * | 2005-01-10 | 2006-05-31 | 北京市地震局 | Short period feedback seismograph |
| CN102085833A (en) * | 2011-01-07 | 2011-06-08 | 吴成芳 | Shockproof fixing frame for vehicle-mounted apparatus |
| CN205193289U (en) * | 2015-11-13 | 2016-04-27 | 中国地震局地震预测研究所 | Supporting structure of low temperature floats seismometer |
| CN206378603U (en) * | 2016-12-31 | 2017-08-04 | 苏州微著设备诊断技术有限公司 | Abnormal sound detection device with shockproof function |
| CN108594291A (en) * | 2018-06-22 | 2018-09-28 | 南方科技大学 | Ocean bottom seismograph |
| WO2019242720A1 (en) * | 2018-06-22 | 2019-12-26 | 南方科技大学 | Electromagnetic release device for submarine seismograph, and submarine seismograph |
| CN210514641U (en) * | 2019-09-26 | 2020-05-12 | 张磊 | Seismometer fixing device |
| CN210347949U (en) * | 2019-10-18 | 2020-04-17 | 张磊 | Seismometer unable adjustment base |
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