CN107884816A - A kind of piezoelectric seismometer - Google Patents
A kind of piezoelectric seismometer Download PDFInfo
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- CN107884816A CN107884816A CN201711329710.9A CN201711329710A CN107884816A CN 107884816 A CN107884816 A CN 107884816A CN 201711329710 A CN201711329710 A CN 201711329710A CN 107884816 A CN107884816 A CN 107884816A
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- 239000000758 substrate Substances 0.000 claims abstract description 57
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- 239000013536 elastomeric material Substances 0.000 claims abstract description 3
- 230000002463 transducing effect Effects 0.000 claims description 20
- 239000013078 crystal Substances 0.000 claims description 10
- 229910000906 Bronze Inorganic materials 0.000 claims description 8
- 239000010974 bronze Substances 0.000 claims description 8
- 230000005684 electric field Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007772 electrode material Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
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- 239000010959 steel Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910003781 PbTiO3 Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
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- 229910019653 Mg1/3Nb2/3 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- 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
- G01V1/181—Geophones
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A kind of piezoelectric seismometer, comprising simply supported beam substrate made of housing and elastomeric material, the both ends on the length direction of simply supported beam substrate are rigidly attached on housing respectively to be horizontally disposed with, in the upper end and lower end of simply supported beam substrate：It is provided with piezoelectricity bar at least on one end along on the length direction of simply supported beam substrate, the set location of each piezoelectricity bar draws output lead to carry out the output of signal respectively about axial symmetry at the half length of simply supported beam substrate on each piezoelectricity bar.The piezoelectric seismometer of the present invention, there is high sensitivity, wide dynamic range, Portable durable, the application of the field such as seismic prospecting, underground seam seismic exploration is more reliable and extensive by land, relative to the cantilever beam structure of single-ended fixation,, can be under conditions of equal length beam substrate by the way of the both-end of simply supported beam substrate is fixed, the frequency range of detection is wider, and used differential structure is stronger compared to non-differential structure, antijamming capability.
Description
Technical field
The present invention relates to field of seismic exploration, more specifically to a kind of piezoelectric seismometer.
Background technology
Geophone be the direct wave of artificial explosive source or the reflected wave conversion on each stratum into electric signal, it is then defeated
Enter a kind of sensor special for being applied to geological prospecting and engineering measurement field to seismic instrument.It can be divided into by operation principle
The wave detectors such as magneto-electric, eddy current type and piezoelectric type.It can be divided into land seismic exploration wave detector, applied to rivers by application environment
The hydrophone of the marine exploration in lake, applied to the borehole seismometer in well-shooting.By energy conversion mechanism point
For two kinds of velocity profile wave detector and acceleration type wave detector.Compressional wave wave detector can be divided into from exploitation method and be also referred to as vertical detection
Device, and transversal wave detector are also referred to as horizontal pickup and three-component geophone.In addition, geophone can also be divided into active detection
Device and passive seismometer.Traditional mechanical moving-coil type and eddy acceleration geophone belong to passive class wave detector, and piezoelectric seismometer category
In active class wave detector.
At present, the widest or traditional simulation geophone of domestic application, this seismic wave sensing device output
Be analog signal, land is mainly using conventional or super velocity profile wave detector.This kind of wave detector is essentially all magnetoelectricity
Formula wave detector, eddy current type geophone, their internal structure are made up of permanent magnet and coil, are essentially all using electricity
Magnetic induction principle, by the interaction of coil and permanent magnet so as to reaching the purpose of seismic prospecting.Inside these wave detectors
There is high flexibility structure as coil, larger relative motion easily occurs between each part and produces deformation, so waveform is easy
Produce deformation, in turn result in distorted signals, and due to the performance of permanent magnet can change and magnetic can over time and
Disappear, its life-span is not long and is vulnerable to the influence of environment, and stability is low, high-precision and high-resolution so as to meet
Seismic prospecting requirement.Process is gathered as first step seismic signal, this detector device can not obtain preferable original earthquake
Signal, the quality of collection geological data is directly influenced, has limited and complicated geological structure is obtained using method of seismic prospecting
Ability, turn into one of main bottleneck for restricting the development of petroleum exploration technology.Raising and oil with high-precision oil-gas exploration technology
The increase of gas exploration complexity, geophone develop towards low distortion, high sensitivity, wide band direction, dynamic
Scope is big, frequency response is wide, equivalent input noise is small, small volume, in light weight and anti-electromagnetic interference capability are strong, meets high-resolution
Collection requires, is the trend of current seismic wave detector development.Various new wave detectors using different new technologies, new material start
Occur.
Piezoelectric acceleration geophone is exactly the new wave detector occurred in recent years, and its internal structure is simple, nonmagnetic steel
And coil, so rigidity is big, deformation is small, and caused wave distortion is small, stable performance, high resolution, be a sensitivity compared with
High high fidelity geophone.Yuan's guarantor's ancient cooking vessel et al. have developed inertial piezoelectric Amphibious wave detector in 1993, and (China is specially
Profit is 93232320.0)；Du Ke is equal to have developed land piezoelectric ceramic seismic detector (Chinese patent 00226749.7)；Liu Zhaoqi
YD20OO types land piezoelectricity seismic acceleration wave detector (Chinese patent 200420042025.X) is have developed, all employs traditional lead
Sour zirconium and zirconia titanate [PbZrO3-PbTiO3] (abbreviation PZT), the intrinsic frequency of piezoelectric seismometer is higher, and high frequency response is preferable, but
Be due to by its traditional piezoelectric elements piezoelectric constant it is low, the influence for the shortcomings of impedance is high, so its dynamic range is small, impedance
Height, LF-response are low.Research shows new relaxor ferroelectric crystal PMN-PT [xPb (Mg1/3Nb2/3)O3-(1-x)
PbTiO3] (abbreviation PMNT) main piezoelectric property index all significantly larger than PZT piezoelectric ceramics for being commonly used.Relaxation iron
Electric monocrystal material has higher piezoelectric constant g33、d33,Electromechanical coupling factor k33, permittivity ε33 TWith relatively low electrical loss,
Its combination property is more superior than PZT ceramics.Sensing element using relaxation Ferroelectric monocrystal material as piezoelectric type geophone
Part, matching detector core body structure is designed, to give full play to the performance advantage of monocrystal material, will be expected to substantially improve it
Sensitivity.
The content of the invention
The technical problem to be solved in the present invention is, to overcome sensitivity existing for existing piezoelectric seismometer inadequate, low
The deficiency of frequency difference in response, there is provided a kind of piezoelectric seismometer, using freely-supported girder structure detector core body, with the confined space
The sensitivity of interior increase wave detector, improves its LF-response performance.
According to the present invention wherein on the one hand, the present invention for solve its technical problem, there is provided piezoelectric seismometer bag
Containing simply supported beam substrate made of housing and elastomeric material, the both ends on the length direction of simply supported beam substrate are rigidly attached to shell respectively
It is horizontally disposed with body, in the upper end and lower end of simply supported beam substrate：Along the length side of simply supported beam substrate at least on one end
Set up piezoelectricity bar, the set location of each piezoelectricity bar respectively about axial symmetry at the half length of simply supported beam substrate,
Output lead is drawn on each piezoelectricity bar to carry out the output of signal.
In the piezoelectric seismometer of the present invention, simply supported beam substrate is made up of beryllium-bronze or phosphor bronze.
In the piezoelectric seismometer of the present invention, the crystal orientation of each piezoelectricity bar is<001>Direction, its polarized electric field direction
Parallel to its thickness direction, at two connection ends of simply supported beam substrate and housing, residing transducing pattern is d31 transducing moulds
Formula, for each piezoelectricity bar at the half length of simply supported beam substrate, residing transducing pattern is d33 transducing patterns.
In the piezoelectric seismometer of the present invention, only there is upper end piezoelectricity bar in the upper end of simply supported beam substrate or only exist
The lower end of simply supported beam substrate has lower end piezoelectricity bar, and the signal exported on upper end piezoelectricity bar or lower end piezoelectricity bar is as the piezoelectricity
The detection signal of geophone.
In the piezoelectric seismometer of the present invention, upper end piezoelectricity bar or the lower end piezoelectricity bar are in simply supported beam substrate
Mass is fixed with half length.
In the piezoelectric seismometer of the present invention, there is upper end piezoelectricity bar in the upper end of simply supported beam substrate and in simply supported beam
The lower end of substrate has lower end piezoelectricity bar, and the upper end piezoelectricity bar is consistent with the piezoelectricity conversion performance of the lower end piezoelectricity bar and closes
Formed between the signal gathered in simply supported beam substrate setting symmetrical above and below, the signal and lower end piezoelectricity bar of the collection of upper end piezoelectricity bar
One group of differential output.
In the piezoelectric seismometer of the present invention, piezoelectric seismometer also has a mass group, the mass group
With two identical in quality and the setting symmetrical above and below of simply supported beam substrate masses, the two masses are respectively arranged at upper end
On that face of the remote simply supported beam substrate of piezoelectricity bar and lower end piezoelectricity bar.
In the piezoelectric seismometer of the present invention, each piezoelectricity bar is single layer structure, using piezoelectric monocrystal PMN-PT systems
Into；Or
The structure of multi-disc piezoelectric monocrystal is respectively adopted in each piezoelectricity bar in whole or in part, and each piezoelectricity bar is each included each
Piezoelectric monocrystal is attached by the arrangement of Crystal polarization direction respectively, and each piezoelectric monocrystal is made of piezoelectric monocrystal PMN-PT.
In the piezoelectric seismometer of the present invention, have the stacked piezoelectricity bar of piezoelectricity strip adoption of multi-disc piezoelectric monocrystal real
It is existing.
The present invention piezoelectric seismometer in, each piezoelectricity bar respectively have upper surface electrode, lower surface electrode, it is each on
Surface electrode and each lower surface electrode draw output lead respectively；
The upper surface electrode of each piezoelectricity bar, the electrode material of lower surface electrode are silver or gold；Each upper surface electrode, each following table
The output lead drawn on the electrode of face is copper cash.
The piezoelectric seismometer of the present invention, has the advantages that high sensitivity, wide dynamic range, Portable durable, in underground
The application of the fields such as seam seismic exploration, land seismic exploration is more reliable and extensive.Relative to the cantilever beam structure of single-ended fixation,
, can be under conditions of equal length beam substrate by the way of the both-end of simply supported beam substrate is fixed, the frequency range of detection
More extensively, and used differential structure is stronger compared to non-differential structure, antijamming capability.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the preferred embodiment of piezoelectric seismometer one provided by the invention；
Fig. 2 is the structural representation of another embodiment of piezoelectric seismometer provided by the invention.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.
As shown in figure 1, its structural representation for the preferred embodiment of piezoelectric seismometer one of the present invention.The piezoelectricity
Shake wave detector, including simply supported beam substrate 2, piezoelectricity bar 3 and mass 4.Simply supported beam substrate 2 uses flexible member, flexible member pair
Vibrations are more sensitive, can increase the sensitivity of piezoelectric seismometer, can be preferably that beryllium-bronze or phosphor bronze are made.Piezoelectricity
The lower surface of bar 3 is pasted on the upper end of simply supported beam substrate 2, and (is closed on axial symmetry at the half length of simply supported beam substrate 2
Axis in figure is symmetrical), piezoelectric seismometer has the pedestal 1 being arranged on housing, the length side of simply supported beam substrate 2
Upward ends A end, B ends are rigidly connected on pedestal 1 with the housing that is rigidly connected respectively, into horizontally disposed.In the another of the present invention
The both ends of simply supported beam substrate 2 directly can be rigidly attached on housing in one embodiment.Piezoelectricity slip 3 is fixed with use on upper surface
Mass 4 made of the alloy such as steel or tungsten, mass 4 be located at piezoelectricity bar 3 at the half length of simply supported beam substrate on, matter
Gauge block 4 can make piezoelectricity bar 3 produce bigger strain.For different piezoelectric seismometers, by setting mass 4 as difference
Quality design the sensitivity of wave detector and resonant frequency；Power is converted to electric signal by piezoelectricity bar 3, the upper surface of piezoelectricity bar 3,
Upper surface electrode and lower surface electrode are respectively provided with lower surface, output is drawn respectively on each upper surface electrode and lower surface electrode
Wire, the output formed on piezoelectricity bar 3 form alone detection signal of the earthquake electric signal as piezoelectric seismometer.
Upper surface electrode and the electrode material of lower surface electrode can use silver, copper or gold.Piezoelectricity bar 3 is strip individual layer knot
Structure, is made of piezoelectric monocrystal (PMN-PT), and the crystal orientation of piezoelectric patches 3 is<001>Direction, it is thick that its polarized electric field is oriented parallel to it
Spend direction.At the nearly A and B ends of simply supported beam, piezoelectric is mainly by the transverse strain from the material caused by vibration, now
Transducing pattern residing for the piezoelectric patches of A and B ends is d31 transducing patterns, at the center O ends of simply supported beam, residing for the piezoelectric at O ends
Transducing pattern is d33 transducing patterns.
With reference to figure 2, it is the structural representation of another embodiment of piezoelectric seismometer of the present invention.The piezoelectricity earthquake is examined
Ripple device, including simply supported beam substrate 2, piezoelectric patches 3, piezoelectric patches 5, piezoelectric patches 6 and mass 4.The present invention with above-described embodiment
Piezoelectric patches 5 and the part of piezoelectric patches 6 are different only in that, piezoelectric patches 5 and piezoelectric patches 6 are respectively arranged at simply supported beam base length direction
Ends A end and B ends, piezoelectric patches 5 and the upper and lower surface of piezoelectric patches 6 are also plated with electrode respectively, distinguish extraction wire on each electrode.Pressure
The crystal orientation of electric piece 5 and 6 is<110>Direction, its polarized electric field are oriented parallel to its thickness direction, and residing transducing pattern is d31
Transducing pattern；The crystal orientation of piezoelectric patches 3 is<001>Direction, its polarized electric field are oriented parallel to its thickness direction, residing transducing mould
Formula is d33 transducing patterns.In the present embodiment, piezoelectric patches 3, piezoelectric patches 5, piezoelectric patches 6 form one group of output, three groups of output letters respectively
Number superposition after as final output, the form of superposition can be three current parallels or three Voltage Series.
With reference to figure 2, it is the structural representation of piezoelectric seismometer another embodiment provided by the invention.The piezoelectricity
Shake wave detector, including simply supported beam substrate 2, upper end piezoelectricity bar 3, lower end piezoelectricity bar 4, mass 5 and mass 6, mass 4 and matter
Gauge block 6 forms mass group.Simply supported beam substrate 2 uses flexible member, and flexible member is more sensitive to shaking, with can increasing piezoelectricity
The sensitivity of wave detector is shaken, can be preferably that beryllium-bronze or phosphor bronze are made.The pressure of upper end piezoelectricity bar 3 and lower end piezoelectricity bar 4
Electric conversion performance is consistent, and the lower surface of upper end piezoelectricity bar 3 is pasted on the upper end of simply supported beam substrate 2, and the upper surface of lower end piezoelectricity bar 4 is pasted
In the lower end of simply supported beam substrate 2, upper end piezoelectricity bar 3, lower end piezoelectricity bar 4 are on 2 setting symmetrical above and below of simply supported beam substrate, lower side pressure
One group of differential output is formed between the signal gathered on the signal and upper end piezoelectricity bar 3 that electric bar 4 gathers.Piezoelectric seismometer has
There is a pedestal 1 being arranged on housing, the ends A end, B ends on the length direction of simply supported beam substrate 2 are rigidly connected in pedestal 1 respectively
On with the housing that is rigidly connected, into horizontally disposed.The both ends of simply supported beam substrate 2 can be directly rigid in another embodiment of the invention
It is connected on housing.Upper end piezoelectricity bar 3 is fixed with using mass 5 made of the alloys such as steel or tungsten, lower end piezoelectricity on upper surface
It is fixed with the lower surface of bar 4 using mass 6 made of the alloys such as steel or tungsten, mass 4, the mass of mass 6 be equal and freely-supported
2 setting symmetrical above and below of beam substrate, mass 4, mass 6 and on piezoelectricity bar can be made to produce bigger strain.For different
Piezoelectric seismometer, it is that different quality designs the sensitivity of wave detector and resonance by setting mass 4, mass 6
Frequency.Power is converted to electric signal, upper end piezoelectricity bar 3, the upper table of lower end piezoelectricity bar 4 by pressure upper end piezoelectricity bar 3, lower end piezoelectricity bar 4
Upper surface electrode and lower surface electrode are respectively provided with face, lower surface, is drawn respectively in each upper surface electrode and lower surface electrode
Output lead.Upper surface electrode and the electrode material of lower surface electrode can use silver, copper or gold.Letter on upper end piezoelectricity bar 3
The output that signal on number output and the lower end piezoelectricity bar 4 that are formed is formed forms one group of differential wave, upper end piezoelectricity bar 3, lower end
The output lead that piezoelectricity bar 4 connects exports the differential wave.Upper end piezoelectricity bar 3, lower end piezoelectricity bar 4 are strip single layer structure, are adopted
It is made of piezoelectric monocrystal (PMN-PT), upper end piezoelectricity bar 3, the crystal orientation of lower end piezoelectricity bar 4 are<001>Direction, its polarized electric field side
To parallel to its thickness direction, at nearly A and B ends, piezoelectric mainly should by the transverse direction from the material caused by vibration
Become, now the transducing pattern residing for the piezoelectric of both ends is d31 transducing patterns.At the O ends of simply supported beam, the piezoelectric institute at O ends
The transducing pattern at place is d33 transducing patterns.
It should be appreciated that the piezoelectricity bar in Fig. 1, Fig. 2 is single layer structure, each piezoelectricity bar is whole in other embodiments
Or the structure of multi-disc piezoelectric monocrystal is respectively adopted in part, each piezoelectric monocrystal that each piezoelectricity bar is each included is respectively by crystal pole
Change direction arrangement to be attached, each piezoelectric monocrystal is made of piezoelectric monocrystal PMN-PT.It can such as use stacked piezoelectricity bar real
It is existing.
The operation principle of the present invention；After piezoelectricity simply supported beam core body is shaken by the earth, piezoelectricity simply supported beam can be with the earth
Vibrate occurrence frequency and the vibration of amplitude identical, due to the effect of mass, piezoelectric can be by for the intermediate ends of piezoelectricity simply supported beam
Power deforms upon, and due to the direct piezoelectric effect of piezoelectric, when piezoelectric produces deformation, can convert mechanical energy into electricity
Can, then gather two piezoelectric patches power on signal, it is possible to obtain earthquake electric signal.It should be appreciated that above-mentioned Fig. 1, Fig. 2 institute
In the embodiment shown, can also not have above-mentioned mass, core body equally being capable of normal work；The length of piezoelectricity bar can be with
Equal or shorter than the length of corresponding simply supported beam, and preferably more than 2/3rds of the length of cantilever beam.
Core of the present invention is simple, light weight, small volume, using the structure of single or more piezoelectricity bar simply supported beams, can fit
For in low-frequency vibration environment, while there is sensitivity with the elevated feature of frequency, because seismic signal is in the process of propagation
In it is lossy, the higher seismic wave of frequency amplitude in communication process is decayed bigger, can compensate earthquake to a certain extent
Wave amplitude increases caused decay with frequency.
Detector core body structure provided by the invention, vibrated using the vibratory drive simple beam structure of local environment, so that
Piezoelectricity bar produces Bending Deformation, makes to produce effective electromotive force between the Different electrodes of piezoelectricity bar, so as to make piezoelectricity more effective
Export energy.
Detector core body structure provided by the invention, has given full play to piezoelectric monocrystal (PMN-PT) anisotropic properties,
Take full advantage of the d of piezoelectric31And d33Two kinds of transducing patterns.The electrode of piezoelectric patches is arranged to upper and lower surface electrode, polarized
Direction and the direction (thickness direction) that is squeezed are consistent.Poisson effect during using piezoelectricity bar from bending, is more effectively played
The performance of piezoelectric patches, improve the energy delivery efficiency of piezoelectric patches.
Generally speaking, based on the present invention provide core geophone have high sensitivity, strong antijamming capability,
The advantages that wide dynamic range, Portable durable, in underground the field such as seam seismic exploration, land seismic exploration application it is more reliable and
Extensively.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (10)
1. a kind of piezoelectric seismometer, it is characterised in that include simply supported beam substrate, simply supported beam made of housing and elastomeric material
Both ends on the length direction of substrate are rigidly attached on housing respectively to be horizontally disposed with, the upper end of simply supported beam substrate and under
In end：Piezoelectricity bar, the set location difference of each piezoelectricity bar are provided with least on one end along on the length direction of simply supported beam substrate
Output lead is drawn on axial symmetry at the half length of simply supported beam substrate, on each piezoelectricity bar to carry out the output of signal.
2. piezoelectric seismometer according to claim 1, it is characterised in that the simply supported beam substrate be beryllium-bronze or
Phosphor bronze is made.
3. piezoelectric seismometer according to claim 1, it is characterised in that the crystal orientation of each piezoelectricity bar is<001>Side
To, its polarized electric field is oriented parallel to its thickness direction, at two connection ends of simply supported beam substrate and housing, residing transducing
Pattern is d31 transducing patterns, and each piezoelectricity bar at the half length of simply supported beam substrate, for d33 change by residing transducing pattern
Can pattern.
4. piezoelectric seismometer according to claim 1, it is characterised in that only have in the upper end of simply supported beam substrate upper
Side pressure electricity bar only has lower end piezoelectricity bar in the lower end of simply supported beam substrate, is exported on upper end piezoelectricity bar or lower end piezoelectricity bar
Detection signal of the signal as the piezoelectric seismometer.
5. piezoelectric seismometer according to claim 4, it is characterised in that the upper end piezoelectricity bar or the lower end
Piezoelectricity bar at the half length of simply supported beam substrate on be fixed with mass.
6. piezoelectric seismometer according to claim 1, it is characterised in that there is upper end in the upper end of simply supported beam substrate
Piezoelectricity bar and there is lower end piezoelectricity bar in the lower end of simply supported beam substrate, the piezoelectricity of the upper end piezoelectricity bar and the lower end piezoelectricity bar
Conversion performance is consistent and on the setting symmetrical above and below of simply supported beam substrate, and the signal of upper end piezoelectricity bar collection on the piezoelectricity bar of lower end with adopting
One group of differential output is formed between the signal of collection.
7. piezoelectric seismometer according to claim 6, it is characterised in that the piezoelectric seismometer also has one
Mass group, the mass group have two identical in quality and the setting symmetrical above and below of simply supported beam substrate masses, the two
Mass is respectively arranged on that face of the remote simply supported beam substrate of upper end piezoelectricity bar and lower end piezoelectricity bar.
8. piezoelectric seismometer according to claim 1, it is characterised in that each piezoelectricity bar is single layer structure, is used
Piezoelectric monocrystal PMN-PT is made；Or
The structure of multi-disc piezoelectric monocrystal, each piezoelectricity that each piezoelectricity bar is each included is respectively adopted in each piezoelectricity bar in whole or in part
Monocrystalline is attached by the arrangement of Crystal polarization direction respectively, and each piezoelectric monocrystal is made of piezoelectric monocrystal PMN-PT.
9. piezoelectric seismometer according to claim 8, it is characterised in that the piezoelectricity bar with multi-disc piezoelectric monocrystal is adopted
Realized with stacked piezoelectricity bar.
10. piezoelectric seismometer according to claim 1, it is characterised in that each piezoelectricity bar has upper surface electricity respectively
Pole, lower surface electrode, each upper surface electrode and each lower surface electrode draw output lead respectively；
The upper surface electrode of each piezoelectricity bar, the electrode material of lower surface electrode are silver or gold；Each upper surface electrode, each lower surface electricity
The extremely upper output lead drawn is copper cash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329710.9A CN107884816A (en) | 2017-12-13 | 2017-12-13 | A kind of piezoelectric seismometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329710.9A CN107884816A (en) | 2017-12-13 | 2017-12-13 | A kind of piezoelectric seismometer |
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| CN107884816A true CN107884816A (en) | 2018-04-06 |
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| CN201711329710.9A Pending CN107884816A (en) | 2017-12-13 | 2017-12-13 | A kind of piezoelectric seismometer |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248865A (en) * | 1989-03-23 | 1990-10-04 | Mazda Motor Corp | Acceleration detector |
| CN2488068Y (en) * | 2001-03-27 | 2002-04-24 | 南京师范大学 | Differential piezoelectric acceleration sensor |
| CN101788684A (en) * | 2010-04-09 | 2010-07-28 | 中国科学院地质与地球物理研究所 | Piezoelectric digital seismometer on land |
| CN102820423A (en) * | 2012-08-27 | 2012-12-12 | 杭州电子科技大学 | Combined piezoelectric micro-power generator |
| CN103197101A (en) * | 2013-04-18 | 2013-07-10 | 厦门乃尔电子有限公司 | Non-uniform section cantilever beam piezoelectricity accelerating speed sensor |
| CN103269179A (en) * | 2013-05-13 | 2013-08-28 | 西安交通大学 | Piezoelectric plate and vibration energy collector |
| JP2014178162A (en) * | 2013-03-14 | 2014-09-25 | Sekisui Chem Co Ltd | Leakage detector |
| CN104237934A (en) * | 2014-09-29 | 2014-12-24 | 中国地质大学 | Differential piezoelectric digital geophone |
| CN207780260U (en) * | 2017-12-13 | 2018-08-28 | 中国地质大学（武汉） | A kind of piezoelectric seismometer |
-
2017
- 2017-12-13 CN CN201711329710.9A patent/CN107884816A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248865A (en) * | 1989-03-23 | 1990-10-04 | Mazda Motor Corp | Acceleration detector |
| CN2488068Y (en) * | 2001-03-27 | 2002-04-24 | 南京师范大学 | Differential piezoelectric acceleration sensor |
| CN101788684A (en) * | 2010-04-09 | 2010-07-28 | 中国科学院地质与地球物理研究所 | Piezoelectric digital seismometer on land |
| CN102820423A (en) * | 2012-08-27 | 2012-12-12 | 杭州电子科技大学 | Combined piezoelectric micro-power generator |
| JP2014178162A (en) * | 2013-03-14 | 2014-09-25 | Sekisui Chem Co Ltd | Leakage detector |
| CN103197101A (en) * | 2013-04-18 | 2013-07-10 | 厦门乃尔电子有限公司 | Non-uniform section cantilever beam piezoelectricity accelerating speed sensor |
| CN103269179A (en) * | 2013-05-13 | 2013-08-28 | 西安交通大学 | Piezoelectric plate and vibration energy collector |
| CN104237934A (en) * | 2014-09-29 | 2014-12-24 | 中国地质大学 | Differential piezoelectric digital geophone |
| CN207780260U (en) * | 2017-12-13 | 2018-08-28 | 中国地质大学（武汉） | A kind of piezoelectric seismometer |
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