CN107247288A - A kind of seismic observation system and the method for generating earthquake transmission function - Google Patents
A kind of seismic observation system and the method for generating earthquake transmission function Download PDFInfo
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
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Abstract
The invention provides a kind of seismic observation system and the method for generating earthquake transmission function, the system includes feedback seismograph and seismic data collector.By by it is former distribute to the leading second order limit task that feedback seismograph realized with analogy method and hand to seismic data collector completion is gone with digital algorithm, feedback seismograph no longer undertakes work period and work damping generation task.Thus one, whole system transmission function main body is all generated by seismic data collector using digital algorithm, and precision is greatly improved and do not influenceed by changes in environmental conditions and time passage.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of seismic observation system and the side for generating earthquake transmission function
Method.
Background technology
Earthquake often results in serious personal's injures and deaths, fire hazard, floods, toxic gas leakage, bacterium and radioactive material
Matter spreads, it is also possible to cause the disasters such as tsunami, landslide, avalanche, ground fissure.Therefore, strengthen seismological observation to be very important.
At present, the transmission function of domestic and international Digital seismic observation system is mainly by feedback seismograph and earthquake data acquisition
" leading second order limit " in the transmission function synthesis of device, seismic observation system (hinder by the work period and work for characterizing seismometer
Buddhist nun) it is to be generated jointly by the analog component in feedback seismograph and mechanical pendulum mass, in wide temperature range and long continuous operation
In it is difficult to ensure that its high accuracy and high stability.And to be mainly high-order low for contribution of the seismic data collector to ssystem transfer function
Pass filter function, contributes little to accuracy of observation.Therefore, the low skill of the accuracy of observation of current Digital seismic observation system presence
Art problem.
The content of the invention
The embodiment of the present invention provides a kind of seismic observation system and the method for generating earthquake transmission function, solves existing skill
The low technical problem of the accuracy of observation of seismic observation system in art, realizes and provides more accurately data for earthquake forecast
Technique effect.
First aspect there is provided a kind of seismic observation system, including feedback seismograph and seismic data collector, wherein, institute
It is without leading second order pole velocity sensory feedback seismometer, for generating the first mould without leading second order limit to state feedback seismograph
Intend voltage waveform, including：First mechanical pendulum, the velocity sensor being connected with first mechanical pendulum, with the velocity sensor
The first loop filter being connected, the first electricity being connected respectively with the first described loop filter and first mechanical pendulum
Machine transducer；First mechanical pendulum and the velocity sensor, the first described loop filter, the first motor transducing
Device the first feedback loop of formation；The seismic data collector is that velocity profile dominates second order limit seismic data collector, for base
The leading second order limit is generated in the first analog voltage waveform, and changes the first digital seismic waveform of generation.
With reference in a first aspect, in the first possible embodiment of first aspect, the sensing of the velocity sensor
The feedback coil of coil and the electric machine transducers is separate.
With reference in a first aspect, in second of possible embodiment of first aspect, the nothing dominates second order pole velocity
Sensory feedback seismometer also includes the first correction module, for correcting the feedback error that first feedback loop is produced.
With reference to the first possible embodiment of first aspect, in the third possible embodiment of first aspect,
First mechanical pendulum is put for the first heavy damping straight line.
With reference in a first aspect, in the 4th kind of possible embodiment of first aspect, the feedback seismograph is without leading
Second order limit displacement sensing feedback seismograph, for generating the second analog voltage waveform without leading second order limit, including：Second
Mechanical pendulum, the displacement transducer being connected with second mechanical pendulum, the second loop filtering being connected with institute displacement sensors
Device, the second electric machine transducers being connected respectively with second loop filter and second mechanical pendulum；Second machinery
Pendulum and institute's displacement sensors, second loop filter, second electric machine transducers the second feedback loop of formation；Describedly
It is that displacement type dominates second order limit seismic data collector to shake data acquisition unit, for based on the second analog voltage waveform life
Into the leading second order limit, and change the second digital seismic waveform of generation.
With reference to the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment of first aspect,
Second electric machine transducers and institute's displacement sensors are placed in the second mechanical pendulum two ends.
With reference to the 4th kind of possible embodiment of first aspect, in the 6th kind of possible embodiment of first aspect,
Second mechanical pendulum is put for the second heavy damping straight line.
With reference to the 4th kind of possible embodiment of first aspect, in the 7th kind of possible embodiment of first aspect,
Institute's displacement sensors are differential capacitor displacement transducer.
There is provided a kind of method for generating earthquake transmission function, applied to seismic observation system, the earthquake system for second aspect
System includes feedback seismograph and seismic data collector, and methods described includes：Receive earth shock and generate mechanical oscillation；Peel off
Leading second order limit in the feedback seismograph simultaneously generates analog voltage waveform；It is described based on analog voltage waveform generation
Leading second order limit simultaneously changes generation digital seismic waveform.
It is described to peel off leading second order limit in the first possible embodiment of second aspect with reference to second aspect
Specially：Increase forms the damping of the first mechanical pendulum of the mechanical oscillation, will by the first feedback system based on the damping
The leading second order Pole Decomposition is two independent single order real poles, and one of them is moved to outside the high-end band of passband,
Another is then moved to outside the low side band of the passband；Or, increase forms the damping of the second mechanical pendulum of the mechanical oscillation
By the leading second order Pole Decomposition it is two independences by the second feedback system with the rigidity of the spring of second mechanical pendulum
Single order real pole, described two independent single order real poles are released outside the high-end band of the passband together.
In the embodiment of the present invention, due to distributing to the leading second order limit times that feedback seismograph is realized with analogy method by former
Business hands to seismic data collector and completion is gone with digital algorithm, and seismometer no longer undertakes the work period and work damping generation is appointed
Business.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and not by
Changes in environmental conditions and the influence of time passage.
In the embodiment of the present invention, because the feedback loop without leading second order pole velocity sensory feedback seismometer is in sensor coil
With two groups of coils are taken in the structure design of feedback coil each using the scheme of independent magnetic system, efficiently avoid two
Straight-through electromagnetic coupled between individual coil, also inhibits feedback loop self-excitation tendency of the deep feedback control loop because leading directly to strap.
In the embodiment of the present invention, because mechanical pendulum is using straight line pendulum structure, it is allowed to which distortionless centre of oscillation displacement is larger,
Higher dynamic range headroom and the relatively low distortion factor can be obtained.Meanwhile, lower mechanical pendulum intrinsic frequency reduces complete machine
Noise, expand dynamic range.
In the embodiment of the present invention, correction module is added in the preceding stand in channel of feedback loop, feedback loop oneself is further prevented
Swash tendency.
Brief description of the drawings
Fig. 1 is the first structural representation of seismic observation system in the embodiment of the present invention；
Fig. 2 is second of structural representation of seismic observation system in the embodiment of the present invention；
Fig. 3 is the flow chart of the method for generation earthquake transmission function in the embodiment of the present invention.
Embodiment
The embodiment of the invention discloses a kind of seismic observation system, including feedback seismograph and seismic data collector, its
In, the feedback seismograph is without leading second order pole velocity sensory feedback seismometer, for generating without leading second order limit
First analog voltage waveform, including：First mechanical pendulum, the velocity sensor being connected with first mechanical pendulum, with the speed
The first loop filter that sensor is connected, is connected with the first described loop filter and first mechanical pendulum respectively
First electric machine transducers；First mechanical pendulum and the velocity sensor, the first described loop filter, first electricity
Machine transducer the first feedback loop of formation；The seismic data collector is that velocity profile dominates second order limit seismic data collector,
For generating the leading second order limit based on the first analog voltage waveform, and change the first digital seismic waveform of generation.
In the embodiment of the present invention, due to distributing to the leading second order limit times that feedback seismograph is realized with analogy method by former
Business hands to seismic data collector and completion is gone with digital algorithm, and seismometer no longer undertakes the work period and work damping generation is appointed
Business.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and not by
Changes in environmental conditions and the influence of time passage.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In addition, " first " " second " is only used for distinguishing the purpose of description herein, and it is not intended that indicating or implying phase
To importance, it can not be interpreted as indicating or hint order.
First, the technical background of the embodiment of the present invention is introduced.
The transmission function of Digital seismic observation system is mainly by feedback seismograph and earthquake data acquisition both at home and abroad at present
" leading second order limit " in the transmission function synthesis of device, seismic observation system (hinder by the work period and work for characterizing seismometer
Buddhist nun) it is to be generated jointly by the analog component in feedback seismograph and mechanical pendulum mass, in wide temperature range and long continuous operation
In it is difficult to ensure that its high accuracy and high stability.And to be mainly high-order low for contribution of the seismic data collector to ssystem transfer function
Pass filter function, contributes little to accuracy of observation.Therefore, the low skill of the accuracy of observation of current Digital seismic observation system presence
Art problem.
In consideration of it, in the embodiment of the present invention, feedback seismograph is no longer undertaken work period and work damping generation task, whole
Individual ssystem transfer function main body is all generated by the digital algorithm of seismic data collector, and precision is greatly improved, and not
Influenceed by changes in environmental conditions and time passage.
Technical scheme provided in an embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Fig. 1 is referred to, one embodiment of the invention provides a kind of seismic observation system, including feedback seismograph and earthquake number
According to collector, wherein, the feedback seismograph is without leading second order pole velocity sensory feedback seismometer 10, including the first machinery
Pendulum 101, the velocity sensor 102 being connected with the first mechanical pendulum 101, the first loop filtering being connected with velocity sensor 102
Device 103, the first electric machine transducers 104 being connected respectively with the first loop filter 103 and the first mechanical pendulum 101；It is leading with nothing
The velocity profile that second order pole velocity sensory feedback seismometer 10 is connected dominates second order limit seismic data collector 11；Wherein,
One mechanical pendulum 101, velocity sensor 102, the first loop filter 103 and the first electric machine transducers 104 the first feedback loop of formation.
In specific implementation process, without the first mechanical pendulum in leading second order pole velocity sensory feedback seismometer 10
101 sensing ground vibrations simultaneously form the first mechanical oscillation.In order to obtain higher dynamic range headroom and the relatively low distortion factor, the
One mechanical pendulum 101 is put using straight line.
Velocity sensor 102 senses first mechanical oscillation, forms the first analog voltage waveform；, the first mechanical pendulum
101st, the first feedback loop of velocity sensor 102, the first loop filter 103 and the formation of the first electric machine transducers 104 is by first
The leading second order limit (generally a pair of complex-conjugate poles) of mechanical pendulum 102 is decomposed into two independent single order real poles,
One of them is moved to outside the high-end band of passband, and another is then moved to outside the low side band of passband, it is lost influence mould
Intend the ability of voltage waveform.
During the fact that specific, in order to ensure the first mechanical pendulum 101 leading second order Pole Decomposition into two solely
Vertical single order real pole can be moved to outside passband, and the first mechanical pendulum 101 uses heavy damping mechanical pendulum, it is preferred that first
The damped coefficient of mechanical pendulum 101 is not less than 50.
Further, in order to avoid in feedback loop in the prior art sensor coil and feedback coil be wound on same magnetic system
In same coil rack on cause the technological deficiency of self-excitation；The sensor coil of feedback loop and feedback coil difference in the present embodiment
Using independent magnetic system.
Further, in order to further avoid feedback loop self-excitation, without leading second order pole velocity sensory feedback seismometer 10
A correction module is added in the forward path of feedback loop.
Velocity profile is dominated second order limit seismic data collector 11 and received without leading second order pole velocity sensory feedback earthquake
First analog voltage waveform of the transmission of meter 10, based on the leading second order limit of the first analog voltage waveform generation, and changes life
Into the first digital seismic waveform.
In specific implementation process, leading second order limit is a pair of complex-conjugate poles in analog domain in S planes, and
The filter factor for being used as generating leading second order limit in seismic data collector is the antipodal points in numeric field Z plane.For
Make after the filter factor in numeric field handled seismic waveform data, its effect can be dominated in height analogue simulation domain
Filter result of the second order limit to seismic waveform signal.Nominal value first is damped by the work period and work of seismological observation requirement,
Calculate corresponding analog domain second order limit coordinate and the coefficient of quadratic polynomial.
The master of velocity pick-up feedback seismograph is calculated according to the coefficient of analog domain second order limit coordinate and quadratic polynomial
The analog function for leading the generation of second order limit is as follows：
In formula：ω2It is right for as the zero point that low side is added with Multi- extended is offset, 0.04 pei is taken in the experiment of this project
Answer the limit that corner frequency is 0.02Hz.ω1=2 pei Huo pei, the correspondence work period is 1s or 2s leading second order limit,Work damping.
Based on the analog function, velocity profile dominates second order limit seismic data collector 11 will using Bilinear transformation method
It is converted into numeric field transmission function, obtains numeric field transmission function formula, as follows：
In formula：a0、a1And a2For the polynomial coefficient of molecule；
b0、b1And b2For the coefficient of denominator polynomials；
C is amplitude versus frequency characte peak value normalization coefficient；
K is conversion coefficient.
Another embodiment of the present invention provides a kind of seismic observation system, refers to Fig. 2, including feedback seismograph and earthquake
Data acquisition unit, wherein, the feedback seismograph is without leading second order limit displacement sensing feedback seismograph 20, for generating nothing
Second analog voltage waveform of leading second order limit, including：Second mechanical pendulum 201, the displacement being connected with the second mechanical pendulum 201 is passed
Sensor 202, the second loop filter 203 being connected with displacement transducer 202, respectively with the second loop filter 203 and
Second electric machine transducers 204 of two mechanical pendulums 201 connection；It is connected with without leading second order limit displacement sensing feedback seismograph 20
Displacement type dominates second order limit seismic data collector 21；Wherein, the second mechanical pendulum 201 and displacement transducer 202, the second loop
Wave filter 203, the second electric machine transducers 204 the second feedback loop of formation.
In specific implementation process, without the second mechanical pendulum in leading second order limit displacement sensing feedback seismograph 20
201, which receive ground vibration, produces the second mechanical oscillation.In order to obtain higher dynamic range headroom and the relatively low distortion factor, second
Mechanical pendulum 201 is put using straight line.
Displacement transducer 202 senses second mechanical oscillation, forms the second analog voltage waveform；Second mechanical pendulum 201
The second feedback loop is formed by the second mechanical pendulum with displacement transducer 202, the second loop filter 203, the second electric machine transducers 204
201 leading second order Pole Decomposition is two independent single order real poles, and two limits are released into the high-end of passband together
Band is outer, the ability for making it lose influence analog voltage waveform.
During the fact that specific, in order to ensure the second mechanical pendulum 201 leading second order Pole Decomposition into two solely
Vertical single order real pole can be moved to outside passband, the second mechanical pendulum 201 selection heavy damping mechanical pendulum, while increase by second
The rigidity of the spring of mechanical pendulum 201.
Further, in order to avoid in feedback loop in the prior art sensor coil and feedback coil be wound on same magnetic system
In same coil rack on cause the technological deficiency of self-excitation；The electric machine transducers of displacement transducer 202 and second in the present embodiment
204 are respectively placed in the two ends of the second mechanical pendulum 201.
Displacement type is dominated second order limit seismic data collector 21 and received without leading second order limit displacement sensing feedback earthquake
Second analog voltage waveform of the transmission of meter 20, based on the leading second order limit of the second analog voltage waveform generation, and changes life
Into the second digital seismic waveform.
In specific implementation process, leading second order limit is a pair of complex-conjugate poles in analog domain in S planes, and
The filter factor for being used as generating leading second order limit in seismic data collector is the antipodal points in numeric field Z plane.For
Make after the filter factor in numeric field handled seismic waveform data, its effect can be dominated in height analogue simulation domain
Filter result of the second order limit to seismic waveform signal.Nominal value first is damped by the work period and work of seismological observation requirement,
Calculate corresponding analog domain second order limit coordinate and the coefficient of quadratic polynomial.
The master of displacement sensing feedback seismograph is calculated according to the coefficient of analog domain second order limit coordinate and quadratic polynomial
The analog function for leading the generation of second order limit is as follows：
In formula：The pei of value 0.1,0.13 pei, 0.05 pei/3,0.025 pei/3,0.05 pei/9, corresponding work period difference
For 20s, 60s, 120s, 240s and 360s；For work damping；
Based on the analog function, displacement type dominates second order limit seismic data collector 21 will using Bilinear transformation method
It is converted into numeric field transmission function, obtains numeric field transmission function formula, as follows：
In formula：a0、a1And a2For the polynomial coefficient of molecule；
b0、b1And b2For the coefficient of denominator polynomials；
C is amplitude versus frequency characte peak value normalization coefficient；
K is conversion coefficient.
Corresponding to above-mentioned seismic observation system, another embodiment of the present invention provides a kind of side for generating earthquake transmission function
Method, as shown in figure 3, applied in the seismic observation system, the seismic system includes feedback seismograph and geological data is adopted
Storage, methods described includes：
S301:Sensing ground vibration simultaneously forms mechanical oscillation；
In specific implementation process, earth shock can be sensed comprising one in the feedback seismograph of seismic observation system
Mechanical pendulum, the mechanical pendulum can sense when ground vibration and forms mechanical oscillation.
S302:Peel off the leading second order limit in the feedback seismograph and generate analog voltage waveform；
In specific implementation process, peeling off the mode of the leading second order limit in the feedback seismograph has two kinds：
The first, increase mechanical pendulum damping, by the first feedback system will the leading second order Pole Decomposition be two
Independent single order real pole, one of them is moved to outside the high-end band of passband, and another is then moved to the passband
Outside low side band.
Second, increase the rigidity of the damping of mechanical pendulum and the spring of the mechanical pendulum, will be described by the second feedback system
Leading second order Pole Decomposition is two independent single order real poles, and described two independent single order real poles are released together
Outside the high-end band of the passband.
Because above two mode has shifted leading second order limit outside passband onto so that leading second order limit loses
" leading " effect.
S303:The leading second order limit is generated based on the analog voltage waveform and generation digital seismic waveform is changed.
It is a pair of conjugate complex number poles in analog domain in S planes due to dominating second order limit in specific implementation process
Point, and the filter factor for being used as generating leading second order limit in seismic data collector is a pair of poles in numeric field Z plane
Point.In order that after the filter factor in numeric field is handled seismic waveform data, its effect being capable of height analogue simulation domain
In dominate second order limit to the filter result of seismic waveform signal.First marked by the work period and work damping of seismological observation requirement
Title value, calculates corresponding analog domain second order limit coordinate and the coefficient of quadratic polynomial.
Velocity pick-up feedback seismograph and position are calculated according to the coefficient of analog domain second order limit coordinate and quadratic polynomial
The analog function for the leading second order limit generation that sensory feedback seismometer is used is moved respectively as formula (1) and formula (2) are shown：
There is the transmission function in analog domain, numeric field is converted it to Bilinear transformation method to be adopted in geological data
Realized in storage with algorithm.This project has selected Bilinear transformation method and has not selected other methods, and its main cause is this
Leading second order limit in mesh is all away from sample rate, the digital transfer function amplitude versus frequency characte obtained with Bilinear transformation method and simulation
Amplitude versus frequency characte similarity highest in domain, the conventional Step Calibration response method characteristic of China's seismological department and the amplitude-frequency in analog domain
Characteristic similar waveform is also most like, obtains numeric field transmission function such as formula (3)：
A, b, c coefficient are exactly the filter factor of the leading second order limit of seismic data collector generation in formula.
At least there is following technique effect or advantage in one or more embodiment that the present invention is provided：
In the embodiment of the present invention, due to distributing to the leading second order limit times that feedback seismograph is realized with analogy method by former
Business hands to seismic data collector and completion is gone with digital algorithm, and seismometer no longer undertakes the work period and work damping generation is appointed
Business.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and not by
Changes in environmental conditions and the influence of time passage.
In the embodiment of the present invention, because the feedback loop without leading second order pole velocity sensory feedback seismometer is in sensor coil
With two groups of coils are taken in the structure design of feedback coil each using the scheme of independent magnetic system, efficiently avoid two
Straight-through electromagnetic coupled between individual coil, also inhibits feedback loop self-excitation tendency of the deep feedback control loop because leading directly to strap.
In the embodiment of the present invention, because mechanical pendulum is using straight line pendulum structure, it is allowed to which distortionless centre of oscillation displacement is larger,
Higher dynamic range headroom and the relatively low distortion factor can be obtained.Meanwhile, lower mechanical pendulum intrinsic frequency reduces complete machine
Noise, expand dynamic range.
In the embodiment of the present invention, correction module is added in the preceding stand in channel of feedback loop, feedback loop oneself is further prevented
Swash tendency.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or product.Obviously,
Those skilled in the art can carry out various changes and modification to the present invention without departing from the spirit and scope of the present invention.This
Sample, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then this hair
It is bright to be also intended to comprising including these changes and modification.
Claims (10)
1. a kind of seismic observation system, including feedback seismograph and seismic data collector, it is characterised in that：
The feedback seismograph is without leading second order pole velocity sensory feedback seismometer, for generating without leading second order limit
First analog voltage waveform, including：First mechanical pendulum, the velocity sensor being connected with first mechanical pendulum, with the speed
The first loop filter that sensor is connected, is connected with the first described loop filter and first mechanical pendulum respectively
First electric machine transducers；First mechanical pendulum and the velocity sensor, the first described loop filter, first electricity
Machine transducer the first feedback loop of formation；
The seismic data collector is that velocity profile dominates second order limit seismic data collector, for based on the described first simulation
Voltage waveform generates the leading second order limit, and changes the first digital seismic waveform of generation.
2. seismic observation system as claimed in claim 1, it is characterised in that the sensor coil of the velocity sensor with it is described
The feedback coil of first electric machine transducers is separate.
3. seismic observation system as claimed in claim 2, it is characterised in that the nothing dominates second order pole velocity sensory feedback
Seismometer also includes the first correction module, for correcting the feedback error that first feedback loop is produced.
4. seismic observation system as claimed in claim 1, it is characterised in that first mechanical pendulum is put for first straight line.
5. seismic observation system as claimed in claim 1, it is characterised in that：
The feedback seismograph is without leading second order limit displacement sensing feedback seismograph, for generating without leading second order limit
Second analog voltage waveform, including：Second mechanical pendulum, the displacement transducer being connected with second mechanical pendulum, with the displacement
The second loop filter that sensor is connected, be connected respectively with second loop filter and second mechanical pendulum
Two electric machine transducers；Second mechanical pendulum is changed with institute displacement sensors, second loop filter, second motor
Can device the second feedback loop of formation；
The seismic data collector is that displacement type dominates second order limit seismic data collector, for based on the described second simulation
Voltage waveform generates the leading second order limit, and changes the second digital seismic waveform of generation.
6. seismic observation system as claimed in claim 5, it is characterised in that second electric machine transducers are passed with the displacement
Sensor is placed in the second mechanical pendulum two ends.
7. seismic observation system as claimed in claim 5, it is characterised in that second mechanical pendulum is put for second straight line.
8. seismic observation system as claimed in claim 5, it is characterised in that institute's displacement sensors pass for differential capacitor displacement
Sensor.
9. a kind of method for generating earthquake transmission function, applied to seismic observation system, the seismic system includes feedback earthquake
Meter and seismic data collector, it is characterised in that methods described includes：
Sensing earth shock simultaneously forms mechanical oscillation；
Peel off the leading second order limit in the feedback seismograph and generate analog voltage waveform；
The leading second order limit is generated based on the analog voltage waveform and generation digital seismic waveform is changed.
10. the method for earthquake transmission function is generated as claimed in claim 9, it is characterised in that second order pole is dominated in the stripping
Put and be specially：
Increase forms the damping of the first mechanical pendulum of mechanical oscillation, and first feedback loop is passed through by the master based on the damping
It is two independent single order real poles to lead second order Pole Decomposition, and one of them is moved to outside the high-end band of passband, another
Then it is moved to outside the low side band of the passband；Or,
Increase forms the rigidity of the damping of the second mechanical pendulum of the mechanical oscillation and the spring of second mechanical pendulum, passes through institute
It is two independent single order real poles that the second feedback loop, which is stated, by the leading second order Pole Decomposition, by described two independent one
Rank real pole is released outside the high-end band of the passband together.
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| CN107329172A (en) * | 2017-09-06 | 2017-11-07 | 四川易诚智讯科技有限公司 | Many attribute visual analysis methods based on spatial information |
| CN109343109A (en) * | 2018-11-27 | 2019-02-15 | 四川省地震局水库地震研究所 | It is embedded in leading second order pole type seismic data collector |
| CN116805462A (en) * | 2023-08-23 | 2023-09-26 | 济南科明数码技术股份有限公司 | Signal measurement system of earthquake simulation experience device |
| CN117233863A (en) * | 2023-09-08 | 2023-12-15 | 同济大学 | Transfer function calibration method and device for three-component seismograph |
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