CN105607116B - Passive piezoelectric seismometer movement and the passive piezoelectric seismometer based on the movement - Google Patents
Passive piezoelectric seismometer movement and the passive piezoelectric seismometer based on the movement Download PDFInfo
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- CN105607116B CN105607116B CN201610153464.5A CN201610153464A CN105607116B CN 105607116 B CN105607116 B CN 105607116B CN 201610153464 A CN201610153464 A CN 201610153464A CN 105607116 B CN105607116 B CN 105607116B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—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
- G01V1/184—Multi-component geophones
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Abstract
The invention discloses a kind of passive piezoelectric seismometer movement and the passive piezoelectric seismometer based on the movement, including ceramic mounting ring, ceramic mounting ring upper and lower surface installs potsherd respectively, potsherd is two-sided positive and negative pasted with ceramic veneer on one piece of substrate, substrate is provided with mesopore, mass body is fixed with by screw on upper potsherd, lower potsherd is fastened on base by screw, screw is provided with the insulating sleeve for preventing the short circuit of the substrate of screw and potsherd, spinning inner housing on base, the circular hole passed for positive and negative lead wires is provided with above inner housing, the positive and negative lead wires of potsherd pass from the top circular hole of inner housing.The passive piezoelectric seismometer movement and the passive piezoelectric seismometer based on the movement, it has high sensitivity, effective band wide and the feature of high s/n ratio.
Description
Technical field
The present invention is to belong to passive piezoelectric seismometer field, is related to a kind of passive piezoelectric seismometer movement and base
In the passive piezoelectric seismometer of the movement.
Background technology
Method of seismic prospecting is always most important exploration means in petroleum exploration industry.This method is to bury wave detector
Ground is placed in, stratum vibration information is extracted by feeding seismic detector by artificial earthquake, digital seismograph is again by these information
Geologic structure information is converted into by data processing.It can be seen that the source of these information is exactly wave detector, wave detector can receive
Information content size directly influence and finally can be obtained geologic structure information content.
Most commonly used both at home and abroad at present is moving-coil seismic detector, but due to the original of this wave detector self structure
Cause, be characterized in high band and low-frequency range receives that sensitivity is consistent, dynamic range is small, effective working band is narrow, anti-interference energy
Power is poor.Because high-frequency signal is decayed soon in transmitting procedure, just seem that this wave detector receives the ability of high-frequency signal.It is all
Multifactor the defects of reflecting this wave detector, it is impossible to obtain the seismic prospecting data of high quality well.
Piezoelectric ceramics wave detector compares moving-coil type magnetoelectricity wave detector, it is advantageous that 1：It is a kind of acceleration type sensing
Device, frequency is higher, and receiving sensitivity is higher.2：Effective working band is wide, can reach 5--400Hz, and moving-coil type magnetoelectricity detection
The working band of device is about 10--200Hz.3：Antijamming capability is better than moving-coil type magnetoelectricity wave detector.4：Dynamic range can reach
To 100dB, and the dynamic range of moving-coil type magnetoelectricity wave detector is about 60dB.
However, piezoelectric seismometer also has the shortcomings that its own, such as：The high-impedance state of piezoelectric ceramics output influences signal transmission
Impedance mismatch with instrument docking, low frequency end sensitivity is relatively low, anti-dropping capability is poor etc..If overcome these above-mentioned shortcomings
If, it will can obtain more preferable geologic information than carrying out seismic prospecting using moving-coil magnetoelectricity wave detector using piezoelectric seismometer.
It is divided into active piezoelectric seismometer and passive piezoelectric seismometer again in piezoelectric seismometer field.Active piezoelectric seismometer
Advantage is that can to improve overall sensitivity and output impedance by the multiplication factor of circuit low, is easily docked with instrument.Its
Shortcoming is that electronic circuit can introduce electrical noise, reduces signal to noise ratio；It is a troublesome thing, it is necessary to by ground to provide power supply for circuit
Wave detector is supplied to after shaking the power supply transformation of instrument, has limited to its use range；If wave detector uses battery powered, it is necessary to
Timing is changed, and this is an i.e. expensive and bothersome additional workload.
If passive piezoelectric seismometer improves sensitivity, output impedance is improved, then it is than active piezoelectric seismometer
Just more advantage.
In petroleum exploration industry, passive piezoelectric seismometer uses only in seafari as acoustic receiver, in land
There is presently no be promoted in ground seismic prospecting.According to open source literature report and Chinese patent literature inquiry and petroleum exploration
Recognize that current only a few passive piezoelectric seismometers of money can also all overcome lacking for following several respects without a kind of in market
Fall into：Sensitivity is low, impedance matching box conversion efficiency is low, frequency band is not wide enough, anti-dropping capability is poor and signal to noise ratio is not high.This is just
It is a kind of no passive piezoelectric seismometer the commercially available large-scale promotion of land oil exploration and application the main reason for.
Passive piezoelectric seismometer is designed with piezoelectric ceramic piece, following point need to mainly be solved according to the characteristics of piezoelectric ceramics：
(1) high-impedance state of piezoelectric ceramics.(2) high voltage low current output characteristic.(3) paradox of sensitivity and bandwidth.(4) it is ceramic
The anti-drop problem that fragility is brought.Etc..
The content of the invention
In order to solve the above technical problems, The present invention provides a kind of high sensitivity, effective band is wide and signal to noise ratio is high
Passive piezoelectric seismometer movement and the passive piezoelectric seismometer based on the movement.
The present invention is to be achieved through the following technical solutions：
A kind of passive piezoelectric seismometer movement, including ceramic mounting ring, ceramic mounting ring upper and lower surface are installed respectively
Potsherd, potsherd are two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore, consolidated on upper potsherd by screw
Surely there is mass body, lower potsherd is fastened on base by screw, and screw, which is provided with, prevents that the substrate of screw and potsherd is short-circuit
Insulating sleeve, spinning inner housing on base is provided with the circular hole passed for positive and negative lead wires above inner housing, potsherd it is positive and negative
Pole lead passes from the top circular hole of inner housing.
Described potsherd is two-sided positive and negative pasted with ceramic veneer on one piece of beryllium-bronze substrate, and substrate is provided with mesopore, beryllium
Bronze base plate thickness is 0.3mm.
Layered ceramic thickness is 0.1mm, and the capacitance of layered ceramic is 150~170nF, the substrate two sides of upper potsherd
2 ceramics are in parallel, and 2 ceramics on the substrate two sides of lower potsherd are in parallel, then upper and lower base plate is short by ceramic mounting ring
Connect and be in series.
A kind of passive piezoelectric seismometer, including ceramic mounting ring, ceramic mounting ring upper and lower surface install ceramics respectively
Piece, potsherd are two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore, is fixed with upper potsherd by screw
Mass body, lower potsherd are fastened on base by screw, and screw, which is provided with, prevents the exhausted of the substrate of screw and potsherd short circuit
Edge sleeve pipe, spinning inner housing on base, the circular hole passed for positive and negative lead wires is provided with above inner housing, the both positive and negative polarity of potsherd draws
Line passes from the top circular hole of inner housing, is connected to outside impedance matching box impedance matching box and inner housing and is provided with shell body,
The bottom installation tail bone of shell body, the top connection output plug of shell body.
A kind of passive piezoelectric seismometer based on passive piezoelectric seismometer movement, including circuit board, impedance
Orchestration and more passive piezoelectric seismometer movements, the more passive piezoelectric seismometer movements centre-to-centre spacing peace such as equiangularly
On circuit boards, the center of circuit board is provided with impedance matching box to dress, and circuit board is securedly mounted on chassis by division board, outside
Sleeve pipe installs rubber seal rear screw additional and is arranged on chassis, and upper lid installs rubber seal rear screw additional and is arranged on outer tube,
Upper lid is connected by the rubber washer of waterproof with pressing line disk, and the center of upper lid passes output lead and inserted in pressing line disk with exporting
The output cable of head is connected, and decile installs more tail cones on chassis.
The hollow space of described pressing line disk pours into the polyurethane adhesive of waterproof.
The passive piezoelectric seismometer movement of more monomers and impedance matching box installation on circuit boards, pass through circuit board cloth
Line realizes the connection in series-parallel relation of more monomers.
The passive piezoelectric seismometer movement of six monomers equiangularly etc. centre-to-centre spacing and three strings two and relations be arranged on
On circuit board, the passive piezoelectric seismometer movement of six monomers shares an impedance matching box, come from different backgrounds and possess different abilities array single-point without
Source piezoelectric seismometer.
The output cable of output plug connects output lead after being knotted inside pressing line disk.
Described impedance matching box rolls into cylindrical shape as magnetic core, double winding using ultracrystallite sheet material.
Compared with prior art, the present invention has technique effect beneficial below：
Passive piezoelectric seismometer movement provided by the invention and the passive piezoelectric seismometer based on the movement, its
With high sensitivity, effective band is wide and the feature of high s/n ratio.
The present invention realizes upper ceramic substrate and lower ceramics using active force and reaction force principle by the mounting structure
Substrate has equal active force.Impedance matching box rolls into cylindrical shape as magnetic core, double winding using ultracrystallite sheet material.Impedance
Adaptation changes the output high-impedance state of potsherd, the output impedance of integral sensors is less than 4K Ω, output sensitivity is more than 1V/
G, output effective bandwidth are more than 250Hz.
Meanwhile the present invention, using 1) one piece of substrate double faced adhesive ceramics, it is that 4 ceramics carry out 2 strings 2 simultaneously to share 2 plate bases
Structure, solve the problems, such as that sensitivity is low.(2) substrate thickness, potsherd thickness, quality shape and weight are rationally designed and solves band
Wide inadequate problem, and there is rational sensitivity.(3) structure design meets anti-drop requirement.(4) output end uses new impedance
Adaptation improves electromagnetic conversion efficiency, and the sensitivity to sacrifice as far as possible small solves the problems, such as high-impedance state as cost.The impedance matching
Device is to be fabricated to magnet ring shape with Superfine crystal material, around twisted pair line circle, makes output impedance within the scope of rational.
By the implementation of these measures, the passive piezoelectric seismometer that the present invention designs reaches following index：(1) export
Sensitivity is more than 1V/g.(2) output effective bandwidth is more than 250Hz, can reach 400Hz.(3) resonance point is higher than 450Hz.
(4) output impedance is less than 4K Ω.
The present invention is that more passive piezoelectric seismometer movements are passed through into certain connection in series-parallel composition of relations (example together
Such as embodiment of the present invention, using passive piezoelectric seismometer movement, combined with 32 modes simultaneously of string), share one
Individual impedance matching box, based on day flat structure, angularly etc. centre-to-centre spacing is arranged on same chassis, realizes increase sensitivity
Purpose.
The passive piezoelectric seismometer of complex array single-point that the present invention designs reaches following index：(1) six combination is defeated
Go out sensitivity and be more than 6V/g.(2) output effective bandwidth is more than 250Hz, can reach 400Hz.(3) resonance point is higher than 450Hz.
(4) output impedance is less than 4K Ω.
Brief description of the drawings
Fig. 1 is a kind of embodiment structural representation provided by the invention；
Fig. 2 is another embodiment structural representation provided by the invention；
Fig. 3 is the plum blossom form schematic diagram of Fig. 2 passive piezoelectric seismometer movement of embodiment six；
Fig. 4 is embodiment list of the invention only passive piezoelectric seismometer cassette mechanism structure schematic diagram.
Wherein, 1：Ceramic mounting ring.2：Potsherd.3：Mass body.4：Screw.5：Insulating sleeve.6：Shell body.7：Bottom
Seat.8：Chassis.9：Inner housing.10：Impedance matching box.11：Passive piezoelectric seismometer movement.12：Tail cone.13:Output is inserted
Head.14：Outer tube.15：Rubber seal.16：Upper lid.17：Rubber seal.18：Pressing line disk.19：Division board.20：Circuit
Plate.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Referring to Fig. 4, a kind of passive piezoelectric seismometer movement, including ceramic mounting ring 1, ceramic mounting ring is two about 1
Potsherd 2 is installed in face respectively, and potsherd 2 is two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore, upper potsherd
Mass body 3 is fixed with by screw 4 on 2, lower potsherd is fastened on base 7 by screw 4, and screw 4, which is provided with, prevents screw
With the insulating sleeve 5 of the substrate of potsherd short circuit, spinning inner housing 9 on base 7, the top of inner housing 9, which is provided with, supplies positive and negative lead wires
The circular hole passed, the positive and negative lead wires of potsherd pass from the top circular hole of inner housing.
Wherein, during described potsherd is two-sided positive and negative pasted with ceramic veneer on one piece of beryllium-bronze substrate, and substrate is provided with
Hole, beryllium-bronze substrate thickness are 0.3mm.Layered ceramic thickness is 0.1mm, and the capacitance of layered ceramic is 150~170nF, on
2 ceramics on the substrate two sides of potsherd 2 are in parallel, and 2 ceramics on the substrate two sides of lower potsherd 2 are in parallel, then will be up and down
Substrate is in series by ceramic mounting ring short circuit.
Referring to Fig. 1, a kind of passive piezoelectric seismometer, including ceramic mounting ring 1, the ceramic upper and lower surface of mounting ring 1 point
Not An Zhuan potsherd 2, potsherd 2 is two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore, on upper potsherd 2
Mass body 3 is fixed with by screw 4, lower potsherd is fastened on base 7 by screw 4, and screw 4, which is provided with, prevents screw and pottery
The insulating sleeve 5 of the substrate short circuit of ceramics, spinning inner housing 9 on base 7, the top of inner housing 9 is provided with to be passed for positive and negative lead wires
Circular hole, the positive and negative lead wires of potsherd 2 pass from the top circular hole of inner housing, are connected to impedance matching box 10, impedance matching
Shell body 6, the bottom installation tail bone 12 of shell body 6, the top connection output of shell body 6 are installed outside device 10 and inner housing 9
Plug 13.
Specifically, a kind of passive piezoelectric seismometer, potsherd 2 is installed on the ceramic two sides of mounting ring 1 respectively, and to ceramics
The two-sided rolling clamping potsherd 2 of mounting ring 1.The potsherd 2 is that two-sided positive and negative pasted with ceramic veneer and have on one piece of beryllium-bronze substrate
ф 4 interior mesopore.The public substrate of upper two ceramics calls substrate, and the public substrate of lower two ceramics is infrabasal plate.Monolithic
Ceramic thickness is 0.1mm, and the capacitance of layered ceramic is 150~170nF, and 2 ceramics on upper substrate two sides are in parallel, infrabasal plate
2 ceramics on two sides are in parallel, then they are in series, and 4 ceramics is formed two strings two and structure, then combination capacitor value is still
150~170nF.Beryllium-bronze substrate thickness is 0.3mm, by heat treatment process.
Mass body 3 is fastened on upper potsherd with screw 4, has insulating sleeve 5 to prevent that screw 4 and upper substrate are short on screw
Road.Lower potsherd is fastened on base 7 by another screw 4, also adds insulating sleeve 5 to prevent that screw 4 and infrabasal plate are short on screw
Road.
Spinning inner housing 9 on base 7.
Positive and negative lead wires pass from the top circular hole of inner housing 9, are connected to impedance matching box 10.
Impedance matching box 10, cylindrical shape is rolled into as magnetic core, double winding using ultracrystallite sheet material.First around it is primary around
Group, then cover ring is around secondary windings.Prevent that it is loose in its external coating insulated paint after the completion of coiling, then twined with insulating tape
Foreign object damage is prevented around parcel.The core material permeability is high, is much better than silicon steel sheet or permalloy, and cirque structure
Leakage field it is few.Adaptation armature winding, with 6 circles of enamel-covered wire coiling 7000；Adaptation secondary windings, with 10 enamel-covered wire coilings
450 circles.
Shell body 6 is installed, and tail bone 12 is installed in the bottom of shell body 6.
Output plug 13 is connected from the top of shell body 6.
Passive piezoelectric seismometer made of this embodiment, output sensitivity 2V/g, output effective bandwidth are
300Hz, output impedance are 3.6K Ω.
The course of work：
By wave detector embedding and underground at least 50cm, ensure the close-coupled between wave detector and the earth.When the earth vibrates,
Because the Action of Gravity Field of mass body makes potsherd deformation produce electric current output.Because potsherd on substrate two sides is positive and negative paste
, make two sides ceramic plane short circuit installing, realize the parallel connection of double-surface ceramics, another potsherd installation method is identical.Two
Substrate realizes the series connection of two groups of potsherds, i.e., overall two strings two and structure by the short circuit of ceramic mounting ring.When upper potsherd
Stress is when mass body deforms, and according to active force and reaction force principle, lower potsherd is also by onesize but in opposite direction
Reaction force be allowed to deform.Upper and lower potsherd output charge and phase is consistent, mutual superimposed (series relationship) simultaneously.Ceramics
Impedance matching box is passed through in the electric charge output of piece, finally in output plug end output voltage signal.
This embodiment has high sensitivity height, effective band wide and high s/n ratio feature.Passive pressure provided by the invention
Electric geophone, output sensitivity are more than 1V/g, and output effective bandwidth is more than 250Hz, and output impedance is less than 4K Ω.
Further, biradical plate totally 4 ceramics composition one piezoceramic transducer, kernel be aided with the mechanical structure and
Other parts form independent passive piezoelectric seismometer.
It should be noted that the positive and negative paste ceramics in the two sides of every piece of substrate, and two panels ceramics are realized into ceramic plane short circuit
Parallel relationship.Upper substrate realizes the series relationship of biplate ceramics with infrabasal plate by ceramic mounting ring short circuit.
It should be noted that ceramic mounting ring 1, material uses brass HP59.Belt substrate double-surface ceramics piece 2, double-surface ceramics
Positive and negative stickup.Baseplate material uses parelinvar beryllium-bronze.Mass body 3, material use stainless steel.Screw 4, material is using yellow
Copper HP59.Insulating sleeve 5, material use plastics.Base 7, material use duralumin.Inner housing 9, material use duralumin.Impedance
Orchestration 10, material roll into cylindrical shape using ultracrystallite band and are used as magnetic core, double winding, additional plastics protective case.Shell body 11, material
Material is process using enhancing modification of nylon with mould.Tail cone 12, material use stainless steel.
The present invention realizes upper ceramic substrate and lower ceramics using active force and reaction force principle by the mounting structure
Substrate has equal active force.Impedance matching box rolls into cylindrical shape as magnetic core, double winding using ultracrystallite sheet material.Impedance
Adaptation changes the output high-impedance state of potsherd, the output impedance of integral sensors is less than 4K Ω, output sensitivity is more than 1V/
G, output effective bandwidth are more than 250Hz.
Meanwhile the present invention utilizes (1) one piece of substrate double faced adhesive ceramics, it is that 4 ceramics carry out 2 strings 2 simultaneously to share 2 plate bases
Structure, solve the problems, such as that sensitivity is low.(2) substrate thickness, potsherd thickness, quality shape and weight are rationally designed and solves band
Wide inadequate problem, and there is rational sensitivity.(3) structure design meets anti-drop requirement.(4) output end uses new impedance
Adaptation improves electromagnetic conversion efficiency, and the sensitivity to sacrifice as far as possible small solves the problems, such as high-impedance state as cost.The impedance matching
Device is to be fabricated to magnet ring shape with Superfine crystal material, around twisted pair line circle, makes output impedance within the scope of rational.
By the implementation of these measures, the passive piezoelectric seismometer that the present invention designs reaches following index：(1) export
Sensitivity is more than 1V/g.(2) output effective bandwidth is more than 250Hz, can reach 400Hz.(3) resonance point is higher than 450Hz.
(4) output impedance is less than 4K Ω.
Referring to Fig. 2 to Fig. 4, a kind of passive piezoelectric seismometer based on above-mentioned passive piezoelectric seismometer movement,
Including circuit board 20, impedance matching box 10 and more passive piezoelectric seismometer movements 11, more passive piezoelectricity seismic detections
Equiangularly etc. centre-to-centre spacing is arranged on circuit board 20 device movement, and the center of circuit board 20 is provided with impedance matching box 10, circuit
Plate 20 is securedly mounted on chassis 8 by division board 19, and outer tube 14 installs the rear screw of rubber seal 15 additional and is arranged on chassis 8
On, upper lid 16 installs the rear screw of rubber seal 17 additional and is arranged on outer tube 14, rubber washer and pressure that upper lid 16 passes through waterproof
Drum 18 is connected, and the center of upper lid 16 passes output lead and is connected in pressing line disk with the output cable of output plug,
Decile installs more tail cones 12 on chassis 8.
The hollow space of described pressing line disk 18 pours into the polyurethane adhesive of waterproof.
The passive piezoelectric seismometer movement 11 of more monomers and impedance matching box installation on circuit boards, pass through circuit board
The connection in series-parallel relation of more monomers is realized in wiring.
The passive piezoelectric seismometer movement 11 of six monomers equiangularly etc. centre-to-centre spacing and three strings two and relations installation
On circuit board 20, the passive piezoelectric seismometer movement 11 of six monomers shares an impedance matching box 10, and come from different backgrounds and possess different abilities battle array
The passive piezoelectric seismometer of list point.
The output cable of output plug connects output lead after being knotted inside pressing line disk.
Described impedance matching box rolls into cylindrical shape as magnetic core, double winding using ultracrystallite sheet material.
Specifically, a kind of passive piezoelectric seismometer based on above-mentioned passive piezoelectric seismometer movement, six nothings
Source piezoelectric seismometer movement 11 (angularly etc. centre-to-centre spacing) in the form of plum blossom is arranged on circular circuit board 20.
32 electrical relations simultaneously of strings are realized in wiring on circuit board 20.
Circuit board 20 is securedly mounted on chassis 8 by division board 19.
Impedance matching box 10 is arranged on the center of circuit board 20.
Outer tube 14 installs rubber seal 15 additional, and spiral is arranged on chassis 8.
Upper lid 16 installs rubber seal 17 additional, and spiral is arranged on outer tube 14.
Output lead is passed in the center of upper lid 16 and the output cable with 408 plugs 13 in pressing line disk 18 is connected.
Pressing line disk 18 is installed with upper lid 16 with screw, centre plus rubber washer waterproof.
The cable of 408 plugs 13 connects output line after being knotted inside pressing line disk 18.
Polyurethane adhesive is poured into the hollow space of pressing line disk 18 to solve the problems, such as waterproof and tension.
Decile installs 3 tail cones 12 on chassis, to ensure sensor installation perpendicularity and the degree of coupling.
The passive piezoelectric seismometer of complex array single-point made of this embodiment, output sensitivity reach monomer movement
3 times of sensitivity, it is 6V/g, output effective bandwidth is 300Hz, and output impedance is 3.5K Ω.
Another embodiment of the present invention：The centre-to-centre spacing installation such as equiangularly of more monomers passive piezoelectric seismometer movement
Together with form and certain connection in series-parallel composition of relations, an impedance matching box is shared, come from different backgrounds and possess different abilities the passive piezoelectricity of array single-point
Geophone.
A kind of passive piezoelectric seismometer of complex array single-point, by more passive piezoelectric seismometer movements with isogonism
The centre-to-centre spacing such as degree are arranged on circular circuit board, are connected up on the circuit board and are realized more passive piezoelectric seismometer movements
Connection in series-parallel electrical relation.The circuit board is securedly mounted on chassis by division board.In the center peace of the circuit board
Fill impedance matching box.Outer tube installs rubber seal spiral additional and is arranged on chassis.Upper lid installs the installation of rubber seal spiral additional
On outer tube.Output lead is passed in the center of upper lid and is connected in pressing line disk with the output cable of output plug.Institute
State pressing line disk to install with upper cover screw, centre plus rubber washer waterproof.Output cable connects output after being knotted in pressing line disk
Line.Polyurethane adhesive is poured into the hollow space of the pressing line disk to solve the problems, such as waterproof and tension.Decile is pacified on the chassis
More tail cones are filled, to ensure sensor installation perpendicularity and the degree of coupling.
The passive piezoelectric seismometer of complex array single-point, output sensitivity reach monomer made of embodiment of the present invention
More times of movement sensitivity, output effective bandwidth are more than 250Hz, and output impedance is less than 4K Ω.
It should be noted that the passive piezoelectric seismometer movement of more monomers and impedance matching box are arranged on circuit board
On, multiunit connection in series-parallel relation is realized by circuit board wiring.Pressing line disk inside cable knotting tension and pour into polyurethane adhesive
Waterproof construction.More tail cones of chassis etc. point installation, ensure the installation perpendicularity of sensor, and improve the installation of sensor and the earth
The degree of coupling so that output effective bandwidth is more than 250Hz, and output impedance is less than 4K Ω.
It should be noted that impedance matching box, material rolls into cylindrical shape using ultracrystallite band and is used as magnetic core, double wrap
Group, additional plastics protective case.Chassis, material use duralumin, anodized.Outer tube, material use duralumin, at anodic oxidation
Reason.Upper lid, material use duralumin, anodized.Pressing line disk, material use duralumin, anodized.Division board,
10mm thickness phenol aldehyde laminated cloth board makes.Circular circuit board, 2mm thickness phenol aldehyde laminated cloth board make.Tail cone, totally three, material uses stainless steel.
In many cases, it is desirable to which seismic sensor has higher sensitivity.The present invention is by more passive piezoelectricity
Shake wave detector movement by certain connection in series-parallel composition of relations together (such as embodiment of the present invention, using passive piezoelectricity
Wave detector movement is shaken, is combined with 32 modes simultaneously of string), an impedance matching box is shared, based on day flat structure, etc.
The centre-to-centre spacing such as angle are arranged on same chassis, realize the purpose of increase sensitivity.
The passive piezoelectric seismometer of complex array single-point that the present invention designs reaches following index：(1) six combination is defeated
Go out sensitivity and be more than 6V/g.(2) output effective bandwidth is more than 250Hz, can reach 400Hz.(3) resonance point is higher than 450Hz.
(4) output impedance is less than 4K Ω.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of passive piezoelectric seismometer movement, it is characterised in that including ceramic mounting ring (1), on ceramic mounting ring (1)
Potsherd (2) is installed on lower two sides respectively, and potsherd (2) is two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore,
Mass body (3) is fixed with by screw (4) on upper potsherd (2), lower potsherd is fastened on base (7) by screw (4), spiral shell
Nail (4) is provided with the insulating sleeve (5) for preventing the short circuit of the substrate of screw and potsherd, spinning inner housing (9) on base (7), interior
The circular hole passed for positive and negative lead wires is provided with above housing (9), the positive and negative lead wires of potsherd are worn from the top circular hole of inner housing
Go out.
2. passive piezoelectric seismometer movement according to claim 1, it is characterised in that described potsherd is one piece
Two-sided positive and negative pasted with ceramic veneer on beryllium-bronze substrate, and substrate is provided with mesopore, and beryllium-bronze substrate thickness is 0.3mm.
3. passive piezoelectric seismometer movement according to claim 1 or 2, it is characterised in that layered ceramic thickness is
0.1mm, the capacitance of layered ceramic is 150~170nF, and 2 ceramics on the substrate two sides of upper potsherd (2) are in parallel, lower pottery
2 ceramics on the substrate two sides of ceramics (2) are in parallel, then upper and lower base plate is in series by ceramic mounting ring short circuit.
A kind of 4. passive piezoelectric seismometer, it is characterised in that including ceramic mounting ring (1), ceramic mounting ring (1) up and down two
Potsherd (2) is installed in face respectively, and potsherd (2) is two-sided positive and negative pasted with ceramic veneer on one piece of substrate, and substrate is provided with mesopore, upper pottery
Mass body (3) is fixed with by screw (4) on ceramics (2), lower potsherd is fastened on base (7) by screw (4), screw
(4) being provided with prevents the insulating sleeve (5) of the substrate of screw and potsherd short circuit, spinning inner housing (9) on base (7), inner casing
The circular hole passed for positive and negative lead wires is provided with above body (9), the positive and negative lead wires of potsherd (2) are worn from the top circular hole of inner housing
Go out, be connected to impedance matching box (10), shell body (6), shell body are installed outside impedance matching box (10) and inner housing (9)
(6) bottom installation tail bone (12), the top connection output plug (13) of shell body (6).
5. a kind of passive piezoelectric seismometer of the passive piezoelectric seismometer movement based on described in claim 1, it is special
Sign is, including circuit board (20), impedance matching box (10) and more passive piezoelectric seismometer movements (11), and more passive
Equiangularly etc. centre-to-centre spacing is arranged on circuit board (20) piezoelectric seismometer movement, and the center of circuit board (20) is provided with resistance
Anti- adaptation (10), circuit board (20) are securedly mounted on chassis (8) by division board (19), and it is close that outer tube (14) installs rubber additional
Seal (15) rear screw is arranged on chassis (8), and upper lid (16) installs rubber seal (17) rear screw additional and is arranged on outer tube
(14) on, upper lid (16) is connected by the rubber washer of waterproof with pressing line disk (18), and the center of upper lid (16) passes output lead
And be connected in pressing line disk with the output cable of output plug, decile installs more tail cones (12) on chassis (8).
6. passive piezoelectric seismometer according to claim 5, it is characterised in that described pressing line disk (18) it is hollow
Part pours into the polyurethane adhesive of waterproof.
7. passive piezoelectric seismometer according to claim 5, it is characterised in that the passive piezoelectricity earthquake inspection of more monomers
The connection in series-parallel that ripple device movement (11) and impedance matching box installation realize more monomers on circuit boards, by circuit board wiring is closed
System.
8. the passive piezoelectric seismometer according to claim 5 or 7, it is characterised in that six passive piezoelectricity of monomer
Shake wave detector movement (11) equiangularly etc. centre-to-centre spacing and three strings two and relations be arranged on circuit board (20), six monomers without
Source piezoelectric seismometer movement (11) shares an impedance matching box (10), the passive piezoelectricity earthquake inspection of the array single-point that comes from different backgrounds and possess different abilities
Ripple device.
9. passive piezoelectric seismometer according to claim 5, it is characterised in that the output cable of output plug is being pressed
Output lead is connected after being knotted inside drum.
10. the passive piezoelectric seismometer according to claim 4 or 5, it is characterised in that described impedance matching box is adopted
Cylindrical shape is rolled into as magnetic core, double winding by the use of ultracrystallite sheet material.
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| CN106019363B (en) * | 2016-05-26 | 2018-01-23 | 西安陆海地球物理科技有限公司 | A kind of piezo-electric type marsh geophone |
| CN107167838A (en) * | 2017-05-25 | 2017-09-15 | 西安思坦测控技术有限公司 | A kind of land vibroseis target positioning piezo-type sensor |
| CN108645504B (en) * | 2018-04-02 | 2020-02-11 | 中国人民解放军海军工程大学 | Sound insulation type earth sound piezoelectric sensor |
| CN109164481B (en) * | 2018-06-22 | 2024-04-19 | 威海双丰物探设备股份有限公司 | Detector coil surface painting device |
| CN111239800B (en) * | 2020-02-26 | 2021-07-16 | 吉林大学 | Interactive auxiliary geophone leveling device and method |
| CN113885072B (en) * | 2021-10-18 | 2023-10-24 | 河北华通线缆集团股份有限公司 | Embedded solid cable detector and manufacturing process thereof |
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