CN205384377U - Piezoelectricity detector arrangement and pressure -sensitive structure thereof - Google Patents
Piezoelectricity detector arrangement and pressure -sensitive structure thereof Download PDFInfo
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- CN205384377U CN205384377U CN201521101579.7U CN201521101579U CN205384377U CN 205384377 U CN205384377 U CN 205384377U CN 201521101579 U CN201521101579 U CN 201521101579U CN 205384377 U CN205384377 U CN 205384377U
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- flat mass
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Abstract
The embodiment of the application provides piezoelectricity detector arrangement and pressure -sensitive structure thereof, wherein this piezoelectricity detector arrangement includes the casing be provided with in the casing: pressure -sensitive structure, it includes flat quality piece, and is used for the response the vibration of flat quality piece and with its piezoelectric patches that converts two slice at least phase couplings of corresponding acceleration voltage signal to, the piezoelectric patches fixed mounting of two slice at least phase couplings in on the flat quality piece, and with parallel relative setting of flat quality piece, amplifier circuit, be used for with acceleration voltage signal enlargies back output. The piezoelectricity detector arrangement simple structure of this application embodiment, the stable performance.
Description
Technical field
The invention relates to seismic signal pickup technology field in seismic prospecting, especially relate to a kind of piezoelectricity detector arrangement and pressure sensitive structural thereof.
Background technology
Current seismic prospecting adopts magneto-electric cymoscope pickup seismic signal on a large scale.General, magneto-electric cymoscope is mainly made up 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 cymoscope.Owing to magneto-electric cymoscope is made up of more than ten accurate parts such as magnet steel, yoke, upper and lower bobbin, spring leaf and upper and lower contact chips, and work in coordination closely, so this kind of frame for movement is complex, and variations in temperature and electromagnetic interference is more sensitive.Therefore, the seismic wave pick device of a kind of simple in construction, stable performance is needed at present badly.
Utility model content
The purpose of the embodiment of the present application is in that 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 reaching above-mentioned purpose, the embodiment of the present application provides a kind of pressure sensitive structural on the one hand, including:
Flat mass；
The piezoelectric patches that at least two panels is coupled, for sensing 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, and 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 distortion compacting hole described in two-layer, and 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 in outer layer distortion compacting hole.
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 a piece of described piezoelectric patches.
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 being 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 being positioned on the upper and lower surface of described flat mass connects fixing by a screw rod running 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 every described piezoelectric patches and thickness identical.
The pressure sensitive structural of the embodiment of the present application, the material of described flat mass is pyrite.
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, including 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 includes:
For the amplifying circuit of output after being amplified by described acceleration voltage signal, it includes the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are sequentially connected.
In the embodiment of the present application, when seismic wave reaches piezoelectricity detector arrangement, seismic wave is conducted on the flat mass to pressure sensitive structural by housing etc. by seismic wave, flat mass vibrates, and then drive piezoelectric patches to produce small strain, thus converting the output of corresponding acceleration voltage signal to, the acceleration voltage signal of pressure sensitive structural output after amplifying circuit processes as the acceleration signal of this seismic wave.As can be seen here, the embodiment of the present application adopts the piezoelectric patches that at least two panels is coupled to add one piece of flat mass simple structure and achieves the pickup of seismic wave, and the embodiment of the present application does not have that components and parts that temperature and electromagnetic interference is comparatively sensitive of magneto-electric cymoscope, thus enhancing its stability.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present application, constitutes the part of the embodiment of the present application, is not intended that 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 be the application one embodiment piezoelectricity detector arrangement in the structured flowchart of amplifying circuit；
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.
Detailed description of the invention
For making the purpose 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 is used for explaining the embodiment of the present application, but is not intended as the restriction to the embodiment of the present application.
Below in conjunction with accompanying drawing, the detailed description of the invention of the embodiment of the present application is described in further detail.
With reference to shown in Fig. 1, the pressure sensitive structural of the embodiment of the present application includes:
Flat mass 2；
For sensing the vibration of described flat mass 2 and converting thereof into the piezoelectric patches 1 that the two panels of corresponding acceleration voltage signal is coupled, the piezoelectric patches 1 that two panels is coupled is fixedly installed on flat mass 2, and is oppositely arranged in parallel with flat mass 2.
In the embodiment of the present application, the upper and lower surface of flat mass 2 is separately installed with a piece of piezoelectric patches 1, and the material of every piezoelectric patches 1 and thickness identical, so it is not only simple in structure, two panels piezoelectric patches 1 is also made to can be good at pressing close to flat mass 2 such that it is able to only small delayed phase sensing ground microseism.
It is coupled as series connection described in the embodiment of the present application.The series connection of multi-disc piezoelectric patches 1 can superposition compliance voltage, thus be conducive to improve detection vibration sensitivity.
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 being positioned on the upper and lower surface of flat mass 2 is separately fixed on the end face of corresponding boss 4, this design makes the contact surface between flat mass 2 and piezoelectric patches 1 be only limitted on the end face of boss 4 this small region, thus being beneficial to be concentrated to stress the middle position of piezoelectric patches 1, and then be conducive to making piezoelectric patches 2 that bigger deformation (strain) to occur, thus improve its detection sensitivity to seismic wave.
In the embodiment of the present application, the axis of flat mass 2 offers axially extending bore, the piezoelectric patches 1 being positioned on the upper and lower surface of flat mass 2 is fixedly clamped by a screw rod 3 running 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 pyrite etc., this is because the density of pyrite is comparatively suitable and impact resistance is better.
In another embodiment of the application, it is also possible to combine use by parallel for multi-disc piezoelectric patches 1 or connection in series-parallel.
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.
With reference to shown in Fig. 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 in outer layer distortion compacting hole.Utility model people is found by long-term theoretical research and substantial amounts of experiment: the stress distribution of this piezoelectric plate structure and stress distribution are optimum, so that its rigidity can be preferably minimized, 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 includes housing and electric power system, is provided with the pressure sensitive structural of above-described embodiment in this housing；And amplifying circuit.This amplifying circuit exports after being amplified for the acceleration voltage signal exported by described pressure sensitive structural.
Shown in Fig. 2, the amplifying circuit of the embodiment of the present application includes the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are sequentially connected.Wherein:
Prime amplifying unit is divided into two-way after amplifying for the signal that the faint acceleration voltage signal that pressure sensitive structural exports is fixed gain；
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 carry out selective filter for respectively a road primary of prime amplifying unit output being amplified signal；One of them low-pass filter unit be used for so that the first setpoint frequency scope (such as 5～200Hz) signal by filter, and substantially unattenuated or decay less；And another low-pass filter unit is used for being set the decay of yardstick (such as 40dB/ frequency multiplication) so that the signal of the second setpoint frequency scope (such as 200～500Hz)；
Rear class power amplifier unit is corresponding with low-pass filter unit, is similarly two groups, is respectively used to the filtering signal by corresponding low-pass filter unit output and carries out power amplification；
Output unit is for exporting after the amplification signal of two groups of rear class power amplifier unit outputs is collectively referred to as a road signal.
In the embodiment of the present application, when seismic wave reaches piezoelectricity detector arrangement, seismic wave is conducted on the flat mass to pressure sensitive structural by housing or support etc. by seismic wave, flat mass vibrates, 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 are connected, the superposed signal that reality is the acceleration voltage signal that each piezoelectric patches produces of pressure sensitive structural output；The acceleration voltage signal of pressure sensitive structural output after amplifying circuit processes as the acceleration signal of this seismic wave.Wherein, the processing procedure of amplifying circuit is having already described above, and does not repeat them here.
As can be seen here, the embodiment of the present application adopts the structural design pressing from both sides flat mass in the middle of two panels piezoelectric patches to achieve the pickup of seismic wave, its structure is relatively simple, and the embodiment of the present application does not have that components and parts that temperature and electromagnetic interference is comparatively sensitive of magneto-electric cymoscope, thus enhancing stability.
In addition, shown in Fig. 3, shown by emulation experiment, the piezoelectricity detector arrangement of the embodiment of the present application has the feature of similar velocity profile cymoscope at 20Hz～400Hz, thus effectively prevent the drawback that under acceleration detector low frequency, sensitivity is too low and high-frequency sensitivity is too high, so that the low-frequency component of signal is greatly enhanced, increase the response band of device simultaneously, the seismic data of high-quality can be provided for high-resolution exploration.Meanwhile, the embodiment of the present application can make system sensitivity be maintained between 50dB～60dB under using frequency range (5Hz to 500Hz), has both ensured the pickup of effective tiny signal, will not bring again too much system interference.
The piezoelectricity detector arrangement of the embodiment of the present application can play the effect substituting tradition magneto-electric cymoscope in conventional and unconventional seismic prospecting；As a kind of single-point cymoscope, its simple in construction, stable performance, this is substantially reduced the working strength of field construction team, saves recruitment cost, is also beneficial to improve the quality of geological exploration data.
Particular embodiments described above; the purpose of the application, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the embodiment of the present application; it is not used to limit the protection domain of the application; all within spirit herein and principle, any amendment of making, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (12)
1. a pressure sensitive structural, it is characterised in that including:
Flat mass；
The piezoelectric patches that at least two panels is coupled, for sensing 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, it is characterised in that offer several equally distributed distortion compacting holes at equal intervals on described piezoelectric patches, described distortion compacting hole is arcuate socket and its both ends seamlessly transit.
3. pressure sensitive structural according to claim 2, it is characterised in that offering at least distortion compacting hole described in two-layer on described piezoelectric patches, 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 in outer layer distortion compacting hole.
4. pressure sensitive structural according to claim 1, it is characterised in that described is coupled as series connection.
5. pressure sensitive structural according to claim 1, it is characterised in that be separately installed with at least a piece of described piezoelectric patches on the upper and lower surface of described flat mass.
6. pressure sensitive structural according to claim 5, it is characterised in that the middle part on the upper and lower surface of described flat mass is respectively equipped with a boss, the piezoelectric patches being 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, it is characterised in that offer axially extending bore on the axis of described flat mass, the piezoelectric patches being positioned on the upper and lower surface of described flat mass connects fixing by a screw rod running through described axially extending bore.
8. pressure sensitive structural according to claim 5, it is characterised in that be separately installed with the piezoelectric patches of same piece number on the upper and lower surface of described flat mass, and the material of every described piezoelectric patches and thickness identical.
9. pressure sensitive structural according to claim 1, it is characterised in that the material of described flat mass is pyrite.
10. pressure sensitive structural according to claim 1, it is characterised in that described piezoelectric patches is piezoelectric crystal plate or piezoelectric ceramic piece.
11. a piezoelectricity detector arrangement, including housing, it is characterised in that be provided with the pressure sensitive structural described in claim 1-10 any one in described housing.
12. piezoelectricity detector arrangement according to claim 11, it is characterised in that described piezoelectricity detector arrangement also includes:
For the amplifying circuit of output after being amplified by described acceleration voltage signal, it includes the prime amplifying unit, low-pass filter unit, rear class power amplifier unit and the output unit that are sequentially connected.
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| CN201521101579.7U CN205384377U (en) | 2015-12-25 | 2015-12-25 | Piezoelectricity detector arrangement and pressure -sensitive structure thereof |
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| CN201521101579.7U CN205384377U (en) | 2015-12-25 | 2015-12-25 | Piezoelectricity detector arrangement and pressure -sensitive structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487109A (en) * | 2015-12-25 | 2016-04-13 | 中国石油天然气集团公司 | Piezoelectric wave detection device and voltage-sensitive structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487109A (en) * | 2015-12-25 | 2016-04-13 | 中国石油天然气集团公司 | Piezoelectric wave detection device and voltage-sensitive structure |
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