CN206920617U - A kind of seismic observation system - Google Patents
A kind of seismic observation system Download PDFInfo
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- CN206920617U CN206920617U CN201720916529.7U CN201720916529U CN206920617U CN 206920617 U CN206920617 U CN 206920617U CN 201720916529 U CN201720916529 U CN 201720916529U CN 206920617 U CN206920617 U CN 206920617U
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Abstract
The utility model provides a kind of seismic observation system, and the system includes feedback seismograph and seismic data collector.Seismic data collector is handed to by the way that original is distributed into the leading second order limit task that feedback seismograph realized with analogy method to go to complete with digital algorithm, feedback seismograph no longer undertakes the work period and work damps 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
Electronic technology field is the utility model is related to, more particularly to a kind of seismic observation system.
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 causes 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
The transmission function of device synthesizes, and " the leading second order limit " in seismic observation system (characterizes work period and the work resistance of 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 contribution of the seismic data collector to ssystem transfer function is mainly that high-order is low
Pass filter function, accuracy of observation is contributed little.Therefore, the low skill of accuracy of observation existing for current Digital seismic observation system
Art problem.
Utility model content
The utility model embodiment provides a kind of seismic observation system, solves the sight of seismic observation system in the prior art
The low technical problem of precision is surveyed, realizes the technique effect that more accurately data are provided for earthquake forecast.
On the one hand, there is provided a kind of seismic observation system, including feedback seismograph and seismic data collector, wherein, it is described
Feedback seismograph is without leading second order pole velocity sensory feedback seismometer, for generating the first simulation without leading second order limit
Voltage waveform, including：First mechanical pendulum, the velocity sensor being connected with first mechanical pendulum, with the velocity sensor phase
First loop filter of connection, the first motor being connected respectively with the first described loop filter and first mechanical pendulum
Transducer；First mechanical pendulum and the velocity sensor, the first described loop filter, first electric machine transducers
Form the first feedback loop；The seismic data collector is that velocity profile dominates second order limit seismic data collector, for based on
The first analog voltage waveform generates the leading second order limit, 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 feedback error caused by first feedback loop.
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 forms the second feedback loop with institute's displacement sensors, second loop filter, second electric machine transducers；Describedly
It is that displacement type dominates second order limit seismic data collector to shake data acquisition unit, for being given birth to based on the second analog voltage waveform
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 both 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.
In the utility model embodiment, due to original to be distributed to the leading second order pole of feedback seismograph analogy method realization
Point task hands to seismic data collector and goes to complete with digital algorithm, and seismometer no longer undertakes work period and work damping life
Into task.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and
Do not influenceed by changes in environmental conditions and time passage.
In the utility model embodiment, because the feedback loop without leading second order pole velocity sensory feedback seismometer is sensing
Two groups of coils are taken in the structure design of coil and feedback coil each using the scheme of an independent magnetic system, are effectively prevented from
Straight-through electromagnetic coupled between two coils, it also inhibits feedback loop self-excitation of the deep feedback control loop because leading directly to strap and incline
To.
In the utility model embodiment, because mechanical pendulum is using straight line pendulum structure, it is allowed to distortionless centre of oscillation displacement
It is larger, higher dynamic range headroom and the relatively low distortion factor can be obtained.Meanwhile lower mechanical pendulum intrinsic frequency, reduce
Total noise of centrifuge, expand dynamic range.
In the utility model embodiment, correction module is added in the preceding stand in channel of feedback loop, further prevents feedback loop
Self-excitation tendency.
Brief description of the drawings
Fig. 1 is the first structural representation of seismic observation system in the utility model embodiment；
Fig. 2 is second of structural representation of seismic observation system in the utility model embodiment；
Embodiment
The utility model embodiment discloses a kind of seismic observation system, including feedback seismograph and earthquake data acquisition
Device, wherein, the feedback seismograph is without leading second order pole velocity sensory feedback seismometer, including the first mechanical pendulum and institute
It is the velocity sensor for stating the connection of the first mechanical pendulum, the first loop filter being connected with the velocity sensor, and described
The first electric machine transducers that first loop filter is connected；First mechanical pendulum and the velocity sensor, described the
One loop filter, first electric machine transducers form the first feedback loop；The seismic data collector is dominated for velocity profile
Second order limit seismic data collector, for generating the leading second order limit based on the first analog voltage waveform, and turn
Change the first digital seismic waveform of generation.
In the utility model embodiment, due to original to be distributed to the leading second order pole of feedback seismograph analogy method realization
Point task hands to seismic data collector and goes to complete with digital algorithm, and seismometer no longer undertakes work period and work damping life
Into task.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and
Do not influenceed by changes in environmental conditions and time passage.
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
In addition, " first " " second " is only used for distinguishing the purpose of description herein, and it is not intended that instruction or hint phase
To importance, can not be interpreted as indicating or hint order.
First, the technical background of the utility model embodiment 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
The transmission function of device synthesizes, and " the leading second order limit " in seismic observation system (characterizes work period and the work resistance of 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 contribution of the seismic data collector to ssystem transfer function is mainly that high-order is low
Pass filter function, accuracy of observation is contributed little.Therefore, the low skill of accuracy of observation existing for current Digital seismic observation system
Art problem.
In consideration of it, in the utility model embodiment, feedback seismograph no longer undertakes the work period and work damping generation is appointed
Business, whole system transmission function main body are all generated by the digital algorithm of seismic data collector, and precision is greatly improved,
And do not influenceed by changes in environmental conditions and time passage.
The technical scheme of the utility model embodiment offer is provided below in conjunction with the accompanying drawings.
Fig. 1 is referred to, the embodiment of the utility model one provides a kind of seismic observation system, including feedback seismograph and ground
Data acquisition unit is shaken, wherein, the feedback seismograph is without leading second order pole velocity sensory feedback seismometer 10, including first
Mechanical pendulum 101, the velocity sensor 102 being connected with the first mechanical pendulum 101, the first loop being connected with velocity sensor 102
Wave filter 103, the first electric machine transducers 104 being connected respectively with the first loop filter 103 and the first mechanical pendulum 101；With nothing
The velocity profile of the leading connection of second order pole velocity sensory feedback seismometer 10 dominates second order limit seismic data collector 11；Its
In, it is anti-that the first mechanical pendulum 101, velocity sensor 102, the first loop filter 103 and the first electric machine transducers 104 form first
Present ring.
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；First mechanical pendulum 101,
The first feedback loop that velocity sensor 102, the first loop filter 103 and the first electric machine transducers 104 are formed is mechanical by first
The leading second order limit (generally a pair of complex-conjugate poles) of pendulum 102 is decomposed into two independent single order real poles, wherein
One 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 simulation electricity
The ability of corrugating.
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, leading second order limit is generated based on the first analog voltage waveform, and change 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
After the filter factor in numeric field is 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.The first work period by seismological observation requirement and work damping nominal value,
Analog domain second order limit coordinate corresponding to calculating 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：ω2For the zero point added as counteracting low side with Multi- extended, 0.04 π is taken in the experiment of this project, it is corresponding
Corner frequency is 0.02Hz limit.ω1=2 π or π, the leading second order limit that the corresponding work period is 1s or 2s,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 utility model provides a kind of seismic observation system, refers to Fig. 2, including feedback seismograph and
Seismic data collector, wherein, the feedback seismograph is without leading second order limit displacement sensing feedback seismograph 20, for giving birth to
Into the first analog voltage waveform without leading second order limit, including：Second mechanical pendulum 201, the position being connected with the second mechanical pendulum 201
Displacement sensor 202, the second loop filter 203 being connected with displacement transducer 202, respectively with the second loop filter 203
With the second electric machine transducers 204 of the second mechanical pendulum 201 connection；With connecting without leading second order limit displacement sensing feedback seismograph 20
The displacement type connect dominates second order limit seismic data collector 21；Wherein, the second mechanical pendulum 201 and displacement transducer 202, second
Loop filter 203, the second electric machine transducers 204 form the second feedback loop.
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, it is lost the ability for influenceing 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 increases 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 both 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, leading second order limit is generated based on the second analog voltage waveform, and change 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
After the filter factor in numeric field is 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.The first work period by seismological observation requirement and work damping nominal value,
Analog domain second order limit coordinate corresponding to calculating 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 π of value 0.1,0.13 π, 0.05 π/3,0.025 π/3,0.05 π/9, the corresponding work period be respectively 20s,
60s, 120s, 240s and 360s；Damped for work；
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.
Following technique effect or advantage at least be present in one or more embodiment provided by the utility model：
In the utility model embodiment, due to original to be distributed to the leading second order pole of feedback seismograph analogy method realization
Point task hands to seismic data collector and goes to complete with digital algorithm, and seismometer no longer undertakes work period and work damping life
Into task.Thus one, whole system transmission function main body is all generated with digital algorithm, and precision is greatly improved, and
Do not influenceed by changes in environmental conditions and time passage.
In the utility model embodiment, because the feedback loop without leading second order pole velocity sensory feedback seismometer is sensing
Two groups of coils are taken in the structure design of coil and feedback coil each using the scheme of an independent magnetic system, are effectively prevented from
Straight-through electromagnetic coupled between two coils, it also inhibits feedback loop self-excitation of the deep feedback control loop because leading directly to strap and incline
To.
In the utility model embodiment, because mechanical pendulum is using straight line pendulum structure, it is allowed to distortionless centre of oscillation displacement
It is larger, higher dynamic range headroom and the relatively low distortion factor can be obtained.Meanwhile lower mechanical pendulum intrinsic frequency, reduce
Total noise of centrifuge, expand dynamic range.
In the utility model embodiment, correction module is added in the preceding stand in channel of feedback loop, further prevents feedback loop
Self-excitation tendency.
It should be understood by those skilled in the art that, the foregoing is only preferred embodiment of the present utility model, not it is used for
Limit the scope that the utility model is implemented, all shape, construction, feature and spirit according to described in the utility model claims scope
Carried out by equivalent changes and modifications, right of the present utility model all should be included in.
Claims (8)
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, it is connected respectively with the first described loop filter and first mechanical pendulum
First electric machine transducers；First mechanical pendulum and the velocity sensor, the first described loop filter, first electricity
Machine transducer forms the first feedback loop；
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 feedback error caused by first feedback loop.
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 pass with the displacement
Sensor is placed in the second mechanical pendulum both 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.
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| CN201720916529.7U CN206920617U (en) | 2017-07-26 | 2017-07-26 | A kind of seismic observation system |
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| CN201720916529.7U CN206920617U (en) | 2017-07-26 | 2017-07-26 | A kind of seismic observation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247288A (en) * | 2017-07-26 | 2017-10-13 | 四川省地震局 | A kind of seismic observation system and the method for generating earthquake transmission function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247288A (en) * | 2017-07-26 | 2017-10-13 | 四川省地震局 | A kind of seismic observation system and the method for generating earthquake transmission function |
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