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CN105487109A - Piezoelectric wave detection device and voltage-sensitive structure - Google Patents

Piezoelectric wave detection device and voltage-sensitive structure Download PDF

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Publication number
CN105487109A
CN105487109A CN201510994237.0A CN201510994237A CN105487109A CN 105487109 A CN105487109 A CN 105487109A CN 201510994237 A CN201510994237 A CN 201510994237A CN 105487109 A CN105487109 A CN 105487109A
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CN
China
Prior art keywords
pressure sensitive
piezoelectric patches
sensitive structural
flat mass
piezoelectric
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CN201510994237.0A
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Chinese (zh)
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CN105487109B (en
Inventor
薛立武
王萌
陈永兵
韩晓波
邵欣
王霞
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China National Petroleum Corp
BGP Inc
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China National Petroleum Corp
BGP Inc
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Priority to CN201510994237.0A priority Critical patent/CN105487109B/en
Publication of CN105487109A publication Critical patent/CN105487109A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G01V1/181Geophones

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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)
  • Measuring Fluid Pressure (AREA)

Abstract

The invention discloses a piezoelectric wave detection device and a voltage-sensitive structure. The piezoelectric wave detection device comprises a housing which is internally provided with the voltage-sensitive structure; the voltage-sensitive structure comprises a flat mass block and at least two voltage sheets which are coupled, wherein the voltage sheets are used for sensing the vibration of the flat mass block and converting the vibration to corresponding acceleration voltage signals; the at least two coupled voltage sheets are fixedly installed on the flat mass block and are arranged in parallel with the flat mass block; and an amplification circuit is used for amplifying and outputting the acceleration signal. The piezoelectric wave detection device is simple in structure and stable in performance.

Description

Piezoelectricity detector arrangement and pressure sensitive structural thereof
Technical field
The embodiment of the present application relates to seismic signal pickup technology field in seismic prospecting, especially relates to a kind of piezoelectricity detector arrangement and pressure sensitive structural thereof.
Background technology
Current seismic prospecting adopts magneto-electric wave detector to pick up seismic signal on a large scale.General, magneto-electric wave detector is formed primarily of assemblies such as magnet steel, coil, spring leafs, and adopts coil cutting magnetic line principle to carry out seismic signal pickup, belongs to a kind of passive velocity type wave detector.Because magneto-electric wave detector is made up of magnet steel, yoke, up and down coil former, spring leaf and contact chip etc. more than ten is accurate up and down parts, and work in coordination closely, so this kind of physical construction is comparatively complicated, and to temperature variation and electromagnetic interference (EMI) more responsive.Therefore, need that a kind of structure is simple, the seismic event pick device of stable performance at present badly.
Summary of the invention
The object of the embodiment of the present application is to provide a kind of piezoelectricity detector arrangement and pressure sensitive structural thereof, to reduce the structure complexity of piezoelectricity detector arrangement, and improves its stability.
For achieving the above object, the embodiment of the present application provides a kind of pressure sensitive structural on the one hand, comprising:
Flat mass;
At least piezoelectric patches that is coupled of two panels, for responding to the vibration of described flat mass and converting thereof into corresponding acceleration voltage signal; Wherein, the piezoelectric patches that described at least two panels is coupled is fixedly installed on described flat mass, and is oppositely arranged with described flat masses parallel.
The pressure sensitive structural of the embodiment of the present application, described piezoelectric patches offers several equally distributed distortion compacting holes at equal intervals, described distortion compacting hole is arcuate socket and its both ends seamlessly transit.
The pressure sensitive structural of the embodiment of the present application, described piezoelectric patches offers at least two-layer described distortion compacting hole, the distortion compacting hole of every layer is positioned at same circumference, wherein, in adjacent two-layer distortion compacting hole:
In internal layer, often the middle part at the interval of adjacent two distortion compacting holes is corresponding with the middle part of a distortion compacting hole in skin.
The pressure sensitive structural of the embodiment of the present application, described is coupled as series connection.
The pressure sensitive structural of the embodiment of the present application, the upper and lower surface of described flat mass is separately installed with at least piezoelectric patches described in a slice.
The pressure sensitive structural of the embodiment of the present application, the middle part on the upper and lower surface of described flat mass is respectively equipped with a boss, and the piezoelectric patches be positioned on the upper and lower surface of described flat mass is separately fixed on the end face of corresponding boss.
The pressure sensitive structural of the embodiment of the present application, the axis of described flat mass offers axially extending bore, and the piezoelectric patches be positioned on the upper and lower surface of described flat mass is connected and fixed by the screw rod that runs through described axially extending bore.
The pressure sensitive structural of the embodiment of the present application, the upper and lower surface of described flat mass is separately installed with the piezoelectric patches of same piece number, and the material of piezoelectric patches described in every sheet and thickness identical.
The pressure sensitive structural of the embodiment of the present application, the material of described flat mass is brass.
The pressure sensitive structural of the embodiment of the present application, described piezoelectric patches is piezoelectric crystal plate or piezoelectric ceramic piece.
On the other hand, the embodiment of the present application additionally provides a kind of piezoelectricity detector arrangement, comprises housing, is provided with above-mentioned pressure sensitive structural in described housing.
The piezoelectricity detector arrangement of the embodiment of the present application, described piezoelectricity detector arrangement also comprises:
For described acceleration voltage signal is amplified the rear amplifying circuit exported, it comprises the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are connected successively.
In the embodiment of the present application, when seismic event reaches piezoelectricity detector arrangement, seismic event conducts on the flat mass in pressure sensitive structural by seismic event by housing etc., flat mass vibration, and then drive piezoelectric patches to produce small strain, thus convert to corresponding acceleration voltage signal export, pressure sensitive structural export acceleration voltage signal after amplifying circuit process as the acceleration signal of this seismic event.As can be seen here, the piezoelectric patches that the embodiment of the present application adopts at least two panels to be coupled adds the pickup that one piece of flat mass simple structure achieves seismic event, and the embodiment of the present application does not have that components and parts comparatively responsive to temperature and electromagnetic interference (EMI) of magneto-electric wave detector, thus enhance its stability.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present application, forms the part of the embodiment of the present application, does not form the restriction to the embodiment of the present application.In the accompanying drawings:
Fig. 1 is the structural representation of the pressure sensitive structural of the application one embodiment;
Fig. 2 is the structured flowchart of amplifying circuit in the piezoelectricity detector arrangement of the application one embodiment;
Fig. 3 is the amplitude-versus-frequency curve of the piezoelectricity detector arrangement of the application one embodiment;
Fig. 4 is the structural representation of the piezoelectric patches of the application one embodiment.
Embodiment
For making the object of the embodiment of the present application, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the embodiment of the present application is described in further details.At this, the schematic description and description of the embodiment of the present application for explaining the embodiment of the present application, but not as the restriction to the embodiment of the present application.
Below in conjunction with accompanying drawing, the embodiment of the embodiment of the present application is described in further detail.
Shown in figure 1, the pressure sensitive structural of the embodiment of the present application comprises:
Flat mass 2;
For responding to the vibration of described flat mass 2 and the piezoelectric patches 1 that is coupled of the two panels converting thereof into corresponding acceleration voltage signal, the piezoelectric patches 1 that two panels is coupled is fixedly installed on flat mass 2, and parallelly with flat mass 2 is oppositely arranged.
In the embodiment of the present application, the upper and lower surface of flat mass 2 is separately installed with a slice piezoelectric patches 1, and the material of every sheet piezoelectric patches 1 and thickness identical, so not only structure is simple, two panels piezoelectric patches 1 is also made to can be good at flat mass 2, thus can with very little delayed phase induction ground microseism.
Series connection is coupled as described in the embodiment of the present application.The series connection of multi-disc piezoelectric patches 1 can superpose compliance voltage, thus is conducive to the sensitivity improving detection vibration.
In the embodiment of the present application, the middle part on the upper and lower surface of flat mass 2 is respectively equipped with a boss 4, the piezoelectric patches 1 be positioned on the upper and lower surface of flat mass 2 is separately fixed on the end face of corresponding boss 4, this small region on the end face that this design makes the surface of contact between flat mass 2 and piezoelectric patches 1 be only limitted to boss 4, thus be conducive to middle position stress being concentrated to piezoelectric patches 1, and then be conducive to making piezoelectric patches 2 that larger deformation (strain) occur, thus improve its detection sensitivity to seismic event.
In the embodiment of the present application, the axis of flat mass 2 offers axially extending bore, the piezoelectric patches 1 be positioned on the upper and lower surface of flat mass 2 is fixedly clamped by the screw rod 3 that runs through described axially extending bore, thus further simplify the structure of the embodiment of the present application.
In the embodiment of the present application, the material of flat mass 2 can adopt brass etc., this is because the density of brass is comparatively suitable and impact resistance is better.
In another embodiment of the application, also can combine multi-disc piezoelectric patches 1 parallel connection or connection in series-parallel use.
In another embodiment of the application, piezoelectric patches 1 material can be piezoelectric crystal plate or piezoelectric ceramic piece.
In another embodiment of the application, the quantity of piezoelectric patches 1 and position are according to can suitably adjust, and such as three piezoelectric patches 1 are all fixedly installed in the same surface (upper surface or lower surface) of flat mass 2.
Shown in figure 4, as another important improvement point in the embodiment of the present application, piezoelectric patches in the pressure sensitive structural of the embodiment of the present application offers at least two-layer distortion compacting hole, the distortion compacting hole of every layer is positioned at same circumference and is uniformly distributed at equal intervals, and each distortion compacting hole is arcuate socket and its both ends seamlessly transit; Wherein, in adjacent two-layer distortion compacting hole: in internal layer, often the middle part at the interval of adjacent two distortion compacting holes is corresponding with the middle part of a distortion compacting hole in skin.Inventor is found by long-term theoretical research and a large amount of experiments: the stress distribution of this piezoelectric plate structure and Strain Distribution optimum, thus it is minimum to make its rigidity to drop to, thus farthest reduce the distortion of piezoelectric patches, substantially increase the sensitivity of its LF-response.
The piezoelectricity detector arrangement of the embodiment of the present application comprises housing and electric power system, is provided with the pressure sensitive structural of above-described embodiment in this housing; And amplifying circuit.The acceleration voltage signal that this amplifying circuit is used for described pressure sensitive structural to export carries out amplifying rear output.
Shown in composition graphs 2, the amplifying circuit of the embodiment of the present application comprises the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are connected successively.Wherein:
Prime amplifying unit is divided into two-way after being fixed the signal amplification of gain for the faint acceleration voltage signal exported by pressure sensitive structural;
Low-pass filter unit is two groups (such as two groups of second-order low-pass filter unit), and two groups of low-pass filter units are used for carrying out selective filter to the elementary amplifying signal in road that prime amplifying unit exports respectively; The signal that one of them low-pass filter unit is provided for the first setpoint frequency scope (such as 5 ~ 200Hz) is by filtering, and substantially unattenuated or decay is less; And the signal that another low-pass filter unit is provided for the second setpoint frequency scope (such as 200 ~ 500Hz) carries out the decay setting yardstick (such as 40dB/ frequency multiplication);
Rear class power amplifier unit is corresponding with low-pass filter unit, is similarly two groups, and the filtering signal being respectively used to corresponding low-pass filter unit to export carries out power amplification;
Output unit exports after being used for that the amplifying signal that two groups of rear class power amplifier units export is collectively referred to as a road signal.
In the embodiment of the present application, when seismic event reaches piezoelectricity detector arrangement, seismic event to conduct on the flat mass in pressure sensitive structural by seismic event by housing or support etc., flat mass vibration, and then driving the piezoelectric patches being located thereon lower two ends to produce small strain, this small strain is converted to corresponding acceleration voltage signal by piezoelectric patches and exports, wherein, when multiple piezoelectric patches series connection, the reality that pressure sensitive structural exports is the superposed signal of the acceleration voltage signal that each piezoelectric patches produces; Pressure sensitive structural export acceleration voltage signal after amplifying circuit process as the acceleration signal of this seismic event.Wherein, the processing procedure of amplifying circuit illustrates above, does not repeat them here.
As can be seen here, the embodiment of the present application adopts the structural design of the flat mass of two panels piezoelectric patches therebetween to achieve the pickup of seismic event, its structure is comparatively simple, and the embodiment of the present application does not have that components and parts comparatively responsive to temperature and electromagnetic interference (EMI) of magneto-electric wave detector, thus enhance stability.
In addition, shown in composition graphs 3, shown by emulation experiment, the piezoelectricity detector arrangement of the embodiment of the present application has the feature of similar velocity profile wave detector at 20Hz ~ 400Hz, thus the too low and drawback that high-frequency sensitivity is too high of sensitivity under effectively prevent acceleration detector low frequency, thus the low-frequency component of signal is strengthened greatly, increase the response band of device simultaneously, can be the seismic data that high-resolution exploration provides high-quality.; Meanwhile, the embodiment of the present application can make system sensitivity remain between 50dB ~ 60dB under use frequency range (5Hz to 500Hz), has both ensured the pickup of effective tiny signal, can not bring too much system interference again.
The piezoelectricity detector arrangement of the embodiment of the present application can play the effect of alternative traditional magneto-electric wave detector in routine and unconventional seismic prospecting; As a kind of single-point wave detector, its structure is simple, stable performance, and this reduces the working strength of field construction team greatly, saves recruitment cost, is also conducive to the quality improving geological exploration data.
Above-described specific embodiment; the object of the application, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the embodiment of the present application; and be not used in the protection domain limiting the application; within all spirit in the application and principle, any amendment made, equivalent replacement, improvement etc., within the protection domain that all should be included in the application.

Claims (12)

1. a pressure sensitive structural, is characterized in that, comprising:
Flat mass;
At least piezoelectric patches that is coupled of two panels, for responding to the vibration of described flat mass and converting thereof into corresponding acceleration voltage signal; Wherein, the piezoelectric patches that described at least two panels is coupled is fixedly installed on described flat mass, and is oppositely arranged with described flat masses parallel.
2. pressure sensitive structural according to claim 1, is characterized in that, described piezoelectric patches offers several equally distributed distortion compacting holes at equal intervals, described distortion compacting hole is arcuate socket and its both ends seamlessly transit.
3. pressure sensitive structural according to claim 2, is characterized in that, described piezoelectric patches offers at least two-layer described distortion compacting hole, the distortion compacting hole of every layer is positioned at same circumference, wherein, in adjacent two-layer distortion compacting hole:
In internal layer, often the middle part at the interval of adjacent two distortion compacting holes is corresponding with the middle part of a distortion compacting hole in skin.
4. pressure sensitive structural according to claim 1, is characterized in that, described is coupled as series connection.
5. pressure sensitive structural according to claim 1, is characterized in that, the upper and lower surface of described flat mass is separately installed with at least piezoelectric patches described in a slice.
6. pressure sensitive structural according to claim 5, is characterized in that, the middle part on the upper and lower surface of described flat mass is respectively equipped with a boss, and the piezoelectric patches be positioned on the upper and lower surface of described flat mass is separately fixed on the end face of corresponding boss.
7. pressure sensitive structural according to claim 5, is characterized in that, the axis of described flat mass offers axially extending bore, and the piezoelectric patches be positioned on the upper and lower surface of described flat mass is connected and fixed by the screw rod that runs through described axially extending bore.
8. pressure sensitive structural according to claim 5, is characterized in that, the upper and lower surface of described flat mass is separately installed with the piezoelectric patches of same piece number, and the material of piezoelectric patches described in every sheet and thickness identical.
9. pressure sensitive structural according to claim 1, is characterized in that, the material of described flat mass is brass.
10. pressure sensitive structural according to claim 1, is characterized in that, described piezoelectric patches is piezoelectric crystal plate or piezoelectric ceramic piece.
11. 1 kinds of piezoelectricity detector arrangements, comprise housing, it is characterized in that, are provided with the pressure sensitive structural described in claim 1-10 any one in described housing.
12. piezoelectricity detector arrangements according to claim 11, is characterized in that, described piezoelectricity detector arrangement also comprises:
For described acceleration voltage signal is amplified the rear amplifying circuit exported, it comprises the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are connected successively.
CN201510994237.0A 2015-12-25 2015-12-25 Piezoelectricity detector arrangement and its pressure sensitive structural Active CN105487109B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106291668A (en) * 2016-07-25 2017-01-04 西安石油大学 Micro logging/wave speed logging piezoelectricity system for acquiring seismic data
CN110503585A (en) * 2019-08-30 2019-11-26 佛山市启明星智能科技有限公司 A kind of students ' physical tutoring system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709360A (en) * 1985-11-12 1987-11-24 Sparton Corporation Hydrophone transducer with negative feedback system
CN2766252Y (en) * 2004-12-31 2006-03-22 朱军 Piezo-electric acceleration detector machine core
CN203465426U (en) * 2013-08-26 2014-03-05 西安思坦仪器股份有限公司 Piezoelectric type universal geophone
CN204065420U (en) * 2014-07-08 2014-12-31 中国石油集团东方地球物理勘探有限责任公司 A kind of for seismic signal receiver apparatus in the petroleum prospecting of land
CN205384377U (en) * 2015-12-25 2016-07-13 中国石油天然气集团公司 Piezoelectricity detector arrangement and pressure -sensitive structure thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709360A (en) * 1985-11-12 1987-11-24 Sparton Corporation Hydrophone transducer with negative feedback system
CN2766252Y (en) * 2004-12-31 2006-03-22 朱军 Piezo-electric acceleration detector machine core
CN203465426U (en) * 2013-08-26 2014-03-05 西安思坦仪器股份有限公司 Piezoelectric type universal geophone
CN204065420U (en) * 2014-07-08 2014-12-31 中国石油集团东方地球物理勘探有限责任公司 A kind of for seismic signal receiver apparatus in the petroleum prospecting of land
CN205384377U (en) * 2015-12-25 2016-07-13 中国石油天然气集团公司 Piezoelectricity detector arrangement and pressure -sensitive structure thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106291668A (en) * 2016-07-25 2017-01-04 西安石油大学 Micro logging/wave speed logging piezoelectricity system for acquiring seismic data
CN110503585A (en) * 2019-08-30 2019-11-26 佛山市启明星智能科技有限公司 A kind of students ' physical tutoring system and method

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