CN110297265A - A kind of wave detector machine core and wave detector based on charge amplification full-differential circuits - Google Patents
A kind of wave detector machine core and wave detector based on charge amplification full-differential circuits Download PDFInfo
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- CN110297265A CN110297265A CN201910486413.8A CN201910486413A CN110297265A CN 110297265 A CN110297265 A CN 110297265A CN 201910486413 A CN201910486413 A CN 201910486413A CN 110297265 A CN110297265 A CN 110297265A
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- wave detector
- machine core
- differential circuits
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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
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- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Geophysics And Detection Of Objects (AREA)
Abstract
The invention belongs to seismic exploration technique field more particularly to a kind of wave detector machine cores and wave detector based on charge amplification full-differential circuits.Pass through the series and parallel of the machine core unit based on charge-extraction mode, and the mode of centre-point earth and two pairs of separate shock units of setting symmetrical above and below provide a kind of without higher input impedance with the tighten together technical solution of composition of hollow screw, can effectively improve the wave detector machine core of low frequency ability to accept；The present invention no matter the length of transmission line, higher common-mode rejection ratio can be provided resist noise interference and will not influence transmission signal voltage amplitude decaying wave detector machine core；The present invention provides the wave detector machine cores that a kind of distribution capacity does not influence frequency bandwidth.
Description
Technical field
The invention belongs to seismic exploration technique field more particularly to a kind of wave detectors based on charge amplification full-differential circuits
Machine core and wave detector.
Background technique
In seismic survey system, the earthquake wave direction stratum depths that man-made explosion generates is propagated, will after stratum is reflected
The wave detector that back wave with formation information is transmitted to ground is received.Wave detector undertakes the reflection wave signal that will be received
It is converted to electric signal and is output to the task of latter earthquake prospecting instrument.Due to the limitation of source level and declining for stratum media
Subtract, the stratum reflection signal that wave detector receives is very faint.The reflection formation information for wanting complete and accurate, just necessarily requires detection
Device have enough sensitivity and it is enough receive frequency bandwidth, and have the ability for resisting external interference.
Wave detector completes the electromechanical transformation of back wave, and electric signal is output to subsequent acquisition station and ground after amplification arranges
Shake instrument is stored and is analyzed.Epicenter excitation generally takes explosive or controlled source, is limited by physical features and condition, vibration letter
The loss of low frequency signal number into stratum transmittance process, wave detector itself receives the part decaying of low frequency signal in addition.It causes to examine
Wave device is received and is passed in seismographic signal, and the deficiency of low-frequency information component, this will have a direct impact on seismic prospecting data
The true reflection of imaging level and stratum looks.Since seismic signal is when stratum depths is transmitted, high-frequency information is deep with transmitting
It is very fast that degree increases decaying, and low-frequency information is even more to play a major role in deep layer exploration, thus if because of low frequency caused by a variety of causes
The missing of information, it will the signal-to-noise ratio for influencing survey acquisition signal, to influence the exploration effects of deep layer.
The machine core of existing land piezoelectric geophone uses the concatenated mode of piezo-electric crystal, is suitble to voltage subtraction mode.Work as inspection
When wave device applied voltage extracts amplification principle, there are strict requirements that must have first with respect to piezoelectricity capacitive feature in circuit
Standby sufficiently high input impedance, could effectively extract required low-frequency information, but excessively high input impedance can bring noise and
The aggravation of drift；Based on its secondary circuit and piezo-electric crystal rise shake unit (machine core) be directly connected to cable be not easy it is too long, otherwise
Cable resistance and distribution capacity can bring biggish loss and biggish interference.Only this two o'clock, to using voltage subtraction amplification
The performance raising of piezoelectric seismometer brings certain limitation.
Summary of the invention
An object of the present invention is to provide one kind without higher input impedance, can effectively improve low frequency ability to accept
Wave detector machine core；The second object of the present invention is to provide it is a kind of no matter the length of transmission line, higher common mode suppression can be provided
Ratio is made to resist the wave detector machine core for the decaying of noise interfered and will not influence transmission signal voltage amplitude；Mesh of the invention
Three be to provide a kind of distribution capacity and do not influence the wave detector machine core of frequency bandwidth.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of wave detector machine core based on charge amplification full-differential circuits, includes at least core shell body, upper cover and support
Frame, the upper surface center of upper cover are provided with through through-hole, are above placed on core shell body, braced frame is connected to machine core
In outer housing；Braced frame includes bracket and support ring, and bracket is connected to side wall in core shell body, on the inner sidewall of bracket between
Further include 1-4 machine core unit every being provided with support ring, the machine core unit horizontal be connected to neighbouring support ring it
Between；Machine core unit includes two pairs of separate shock units, a hollow screw and a substrate；Outside the separate shock unit
Along there is a lead, the center of the separate shock unit and substrate is provided with coaxial through-hole, and hollow screw passes through separate shock
The coaxial through-hole of unit and substrate is fastenedly connected by substrate and positioned at two pairs of separate shock units of substrate setting symmetrical above and below；Solely
The lead of vertical vibration unit is connected to drawing through through-hole for upper cap upper surface by the center of hollow screw.
The separate shock unit is made of a mass body and an electro-mechanical conversion element, mass body and electromechanical transformation
Element has coaxial through-hole, and the outer diameter of mass body is less than the outer diameter of electro-mechanical conversion element, and the electro-mechanical conversion element is placed in base
Between piece and mass body, the outer of electro-mechanical conversion element is connected with a lead.
The electro-mechanical conversion element is piezoelectric chip or piezoelectric ceramic piece.
It is connected between the machine core unit using serial or parallel connection mode, center connecting wire with circuit connects.
The upper cover and core shell body uses metal material.
A kind of wave detector based on charge amplification full-differential circuits, includes at least wave detector shell, circuit board and output line,
It further includes wave detector machine of the even number based on charge amplification full-differential circuits through through-hole that the upper surface of wave detector shell, which is provided with,
Core；The wave detector machine core based on charge amplification full-differential circuits is connect with the inner sidewall of wave detector shell, the electricity
Road plate is fixed by the bracket in the upper surface of core shell body, circuit board and the wave detector machine based on charge amplification full-differential circuits
Line connects between core, and output line is connect by the through-hole that runs through of the upper surface of wave detector shell with circuit board.
The wave detector shell is bar shaped or dish-type.
Wave detector machine core of the even number based on charge amplification full-differential circuits is linear in the bar shaped wave detector shell
It lays, connects between the wave detector machine core based on charge amplification full-differential circuits.
Wave detector machine core of the even number based on charge amplification full-differential circuits is rounded in the dish-type wave detector shell
Array is laid, in parallel between the wave detector machine core based on charge amplification full-differential circuits.
The utility model has the advantages that
1, mass body is evenly distributed to each piezoelectric bimorph on piece, piezoelectric bimorph and upper and lower mass body hollow screw
It tightens together.Upper and lower quality body weight unanimously guarantees that piezoelectric chip is in centre of oscillation position, and piezoelectric chip is not when non-stress
Charge is generated, does not generate drift because of unbalance stress after guaranteeing circuit connection.
2, each piezoelectric chip and mass body form an Independent Vibration unit, compared with multi-disc train Stiffness,
Be conducive to the reception to tiny signal, improve the sensitivity of wave detector.
3, machine core wiring cooperation subsequent conditioning circuit takes series-parallel form group to be combined into the machine core of full equilibrium form, and center connects and leads
Line with circuit connects, and meets the requirement of full-differential circuits.It will not cause the reduction of complete machine common-mode rejection ratio because of machine core.
4, upper cover and shell use metal material to play electromagnetic shielding action to machine core, and it is integrally anti-interference to strengthen wave detector
Ability.
5, the use of hollow screw reduces assembling difficulty and improves production effect convenient for the connection of conducting wire when piezoelectric chip parallel connection
Rate.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is wave detector cassette mechanism structure schematic diagram of the invention；
Fig. 2 is the series-parallel schematic diagram of machine core equivalent capacity of the present invention；
Fig. 3 is machine core of the present invention and circuit connection diagram；
Fig. 4 is machine core layout diagram in bar shaped wave detector of the present invention；
Fig. 5 is machine core layout diagram in dish-type wave detector of the present invention；
Wave detector machine core Fig. 6 of the invention takes piezoelectric chip parallel form structural schematic diagram；
Wave detector machine core parallel piezoelectric wafer circuit isoboles Fig. 7 of the invention.
In figure, 1- core shell body；2- upper cover；3- bracket；4- support ring；5- hollow screw；6- substrate；7- mass body；
8- electro-mechanical conversion element；9- wave detector shell；10- circuit board；11- output line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of wave detector machine core based on charge amplification full-differential circuits as shown in figs. 1-7, includes at least core shell
Body 1, upper cover 2 and braced frame, the upper surface center of upper cover 2 are provided with through through-hole, and upper cover 2 is placed on core shell body 1,
Braced frame is connected in core shell body 1；Braced frame includes bracket 3 and support ring 4, and bracket 3 is connected to core shell body 1
Inner sidewall is arranged at intervals with support ring 4 on the inner sidewall of bracket 3, further includes 1-4 machine core unit, the machine core unit water
Flushconnection is between neighbouring support ring 4；Machine core unit includes two pairs of separate shock units, a hollow screw 5 and one
Substrate 6；There is a lead in the outer of the separate shock unit, and the center of the separate shock unit and substrate 6 is provided with
Coaxial through-hole, hollow screw 5 is by the way that the coaxial through-hole of separate shock unit and substrate 6 is by substrate 6 and to be located at substrate 6 symmetrical above and below
Two pairs of separate shock units being arranged are fastenedly connected；The lead of separate shock unit is connected to by the center of hollow screw 5
It is drawn through through-hole 2 upper surface of lid.
It is preferably connected between the machine core unit using serial or parallel connection mode, center connecting wire is with circuit
Connect.
In actual use, by the series and parallel of the machine core unit based on charge-extraction mode, and the side of centre-point earth
Formula and two pairs of separate shock units of setting symmetrical above and below tightened together with hollow screw composition technical solution in, hollow spiral shell
The connection of conducting wire is convenient in the use of nail, reduces assembling difficulty, improves production efficiency.The technical solution of separate shock unit, than
The multi-disc train Stiffness for playing the prior art, is conducive to the reception to tiny signal, improves the sensitivity of wave detector.
Machine core wiring cooperation subsequent conditioning circuit takes series-parallel form group to be combined into the machine core of full equilibrium form, and center connecting wire is with circuit
Connect, meets the requirement of full-differential circuits.It will not cause the reduction of complete machine common-mode rejection ratio because of machine core.That support ring 4 is arranged
Particular number is arranged according to actual needs in number.
Embodiment two:
A kind of wave detector machine core based on charge amplification full-differential circuits as shown in Figure 1 and Figure 4, it is different from embodiment one
Place is: the separate shock unit is made of a mass body 7 and an electro-mechanical conversion element 8, mass body 7 and electromechanics
Conversion element 8 has coaxial through-hole, and the outer diameter of mass body 7 is less than the outer diameter of electro-mechanical conversion element 8, the electro-mechanical conversion element
8 are placed between substrate 6 and mass body 7, and the outer of electro-mechanical conversion element 8 is connected with a lead.
Preferably the electro-mechanical conversion element 8 is piezoelectric chip or piezoelectric ceramic piece.
In actual use, the weight of all mass bodies 7 is consistent, and the setting of the mass body 7 of consistent weight ensure that
Piezoelectric chip is in centre of oscillation position, and piezoelectric chip is made when non-stress not generate charge, guarantee after circuit connection not because by
Power is uneven and generates drift, improves the effect of test.
Embodiment three:
A kind of wave detector machine core based on charge amplification full-differential circuits as shown in Figure 1 and Figure 4, it is different from embodiment 1
Place is: the upper cover 2 and core shell body 1 uses metal material.
In actual use, upper cover 2 and core shell 1 use metal material to play electromagnetic shielding action to machine core, reinforce
Wave detector entirety anti-interference ability.
Example IV:
Such as a kind of Fig. 1-wave detector based on charge amplification full-differential circuits shown in Fig. 7, wave detector shell is included at least
9, circuit board 10 and output line, the upper surface of wave detector shell 9 are provided with through through-hole, further include based on charge amplification fully differential electricity
The wave detector machine core on road；The circuit board 10 and wave detector machine core is placed in wave detector shell 9, and circuit board 10 is connected to detection
1 upper surface of device core shell body, circuit board 10 are connect with wave detector machine core line, and output line passes through the upper surface of wave detector shell 9
Connect with circuit board 10 through through-hole.
In actual use, using the wave detector of the wave detector machine core based on charge amplification full-differential circuits, Neng Gouti
The sensitivity of high wave detector will not cause the reduction of complete machine common-mode rejection ratio because of machine core reason, and strengthen wave detector entirety
Anti-interference ability reduces assembling difficulty and improves production efficiency.
Embodiment five:
A kind of wave detector based on charge amplification full-differential circuits as shown in Figure 1, Figure 4 and Figure 5, it is different from example IV
Place is: being bar shaped wave detector or dish-type wave detector.
Several wave detector machine cores are linearly laid in the preferably described bar shaped wave detector shell 9, wave detector machine core it
Between connect.
The rounded array of wave detector machine core is laid in the preferably described dish-type wave detector shell 9, wave detector machine core it
Between it is in parallel.
In actual use, no matter bar shaped wave detector or dish-type wave detector are used, all reduces the height of wave detector, it is convenient
Use to the wave detector for having requirement for height region is required according to the geographical environment of actual test region, chooses different height
Wave detector, to expand the use scope of wave detector.
Wave detector machine core takes its structure of piezoelectric chip parallel form as shown in figure 5, parallel piezoelectric wafer circuit is equivalent such as
Shown in Fig. 6.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.
Technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
Claims (9)
1. it is a kind of based on charge amplification full-differential circuits wave detector machine core, include at least core shell body (1), upper cover (2) and
Braced frame, the upper surface center of upper cover (2) are provided with through through-hole, and upper cover (2) is placed on core shell body (1), support
Frame is connected in core shell body (1)；Braced frame includes bracket (3) and support ring (4), and bracket (3) is connected to outside machine core
Shell (1) inner sidewall is arranged at intervals with support ring (4) on the inner sidewall of bracket (3), it is characterised in that: further include 1-4 machine core
Unit, the machine core unit horizontal are connected between neighbouring support ring (4)；Machine core unit includes two pairs of separate shock lists
Member, a hollow screw (5) and a substrate (6)；There are a lead, the independent shake in the outer of the separate shock unit
The center of moving cell and substrate (6) is provided with coaxial through-hole, and hollow screw (5) is same by separate shock unit and substrate (6)
Shaft through-hole is fastenedly connected by substrate (6) and positioned at two pairs of separate shock units of substrate (6) setting symmetrical above and below；Separate shock list
The lead of member is connected to drawing through through-hole for upper cover (2) upper surface by the center of hollow screw (5).
2. a kind of wave detector machine core based on charge amplification full-differential circuits as described in claim 1, it is characterised in that: described
Separate shock unit be made of a mass body (7) and an electro-mechanical conversion element (8), mass body (7) and electromechanical transformation member
Part (8) has coaxial through-hole, and the outer diameter of mass body (7) is less than the outer diameter of electro-mechanical conversion element (8), the electro-mechanical conversion element
(8) it is placed between substrate (6) and mass body (7), the outer of electro-mechanical conversion element (8) is connected with a lead.
3. a kind of wave detector machine core based on charge amplification full-differential circuits as claimed in claim 2, it is characterised in that: described
Electro-mechanical conversion element (8) be piezoelectric chip or piezoelectric ceramic piece.
4. a kind of wave detector machine core based on charge amplification full-differential circuits as described in claim 1, it is characterised in that: described
Machine core unit between connected using serial or parallel connection mode, center connecting wire with circuit connects.
5. a kind of wave detector machine core based on charge amplification full-differential circuits as described in claim 1, it is characterised in that: described
Upper cover (2) and core shell body (1) use metal material.
6. a kind of wave detector based on charge amplification full-differential circuits, includes at least wave detector shell (9), circuit board (10) and defeated
The upper surface of outlet (11), wave detector shell (9) is provided with through through-hole, it is characterised in that: further includes even number such as claim
Wave detector machine core based on charge amplification full-differential circuits described in one of 1-5；Described amplifies full-differential circuits based on charge
Wave detector machine core connect with the inner sidewall of wave detector shell (9), the circuit board (10) is fixed by the bracket outside machine core
The upper surface of shell (1), line is connect between circuit board (10) and the wave detector machine core based on charge amplification full-differential circuits, is exported
Line (11) is connect by the through-hole that runs through of the upper surface of wave detector shell (9) with circuit board (10).
7. a kind of wave detector based on charge amplification full-differential circuits as claimed in claim 6, it is characterised in that: the inspection
Wave device shell (9) is bar shaped or dish-type.
8. a kind of wave detector based on charge amplification full-differential circuits as claimed in claim 7, it is characterised in that: the item
Shape wave detector shell (9) interior even number is linearly laid based on the wave detector machine core of charge amplification full-differential circuits, is based on charge
Amplify and connects between the wave detector machine core of full-differential circuits.
9. a kind of wave detector based on charge amplification full-differential circuits as claimed in claim 8, it is characterised in that: the disk
Type wave detector shell (9) interior even number is laid based on the rounded array of wave detector machine core of charge amplification full-differential circuits, is based on
Charge amplifies in parallel between the wave detector machine core of full-differential circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486413.8A CN110297265A (en) | 2019-06-05 | 2019-06-05 | A kind of wave detector machine core and wave detector based on charge amplification full-differential circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486413.8A CN110297265A (en) | 2019-06-05 | 2019-06-05 | A kind of wave detector machine core and wave detector based on charge amplification full-differential circuits |
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| Publication Number | Publication Date |
|---|---|
| CN110297265A true CN110297265A (en) | 2019-10-01 |
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ID=68027640
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910486413.8A Pending CN110297265A (en) | 2019-06-05 | 2019-06-05 | A kind of wave detector machine core and wave detector based on charge amplification full-differential circuits |
Country Status (1)
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|---|---|
| CN (1) | CN110297265A (en) |
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2019
- 2019-06-05 CN CN201910486413.8A patent/CN110297265A/en active Pending
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