CN2724017Y - Marine seismic wave detector - Google Patents
Marine seismic wave detector Download PDFInfo
- Publication number
- CN2724017Y CN2724017Y CN 200420042128 CN200420042128U CN2724017Y CN 2724017 Y CN2724017 Y CN 2724017Y CN 200420042128 CN200420042128 CN 200420042128 CN 200420042128 U CN200420042128 U CN 200420042128U CN 2724017 Y CN2724017 Y CN 2724017Y
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- cavity
- substrate
- shell
- wave detector
- piezoelectric
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Abstract
The utility model relates to a marine seismic wave detector which comprises a vibrating body and an accommodator. The utility model is characterized in that the vibrating body is fixed in a shell. The vibrating body is at least composed of a piezoelectric and a metal substrate. The piezoelectric is fixed on the substrate and the substrate is fixed on the shell. The piezoelectric and the metal substrate in the shell form at least one cavity and a cavity vibrating body is formed. The accommodator is composed of a magnetic conductive material and an adapter loop. The magnetic conductive material combines a primary loop and a secondary loop together. The primary loop is connected with the piezoelectric material and the secondary loop is electrically connected with the cable. A projection is arranged on the external layer shell of the cavity vibrating body. The external shell is made of acoustic transmission materials. The marine seismic wave detector can overcome the problem that the wave detector used in the present sea exploration can not provide good receptivity of the signal at low-frequency stage and the receiving effect is relatively poor.
Description
Affiliated technical field: the utility model relates to a kind of marine seismometer, claims the ocean nautical receiving set again, belongs to the acoustic transducer field, and its effect is that mechanical vibrational energy is converted to electric energy by piezoelectric, with the form output of electric signal.Electric signal input instrument by instrument record and analysis, obtains actual geologic information.
Background technology: in offshore shooting and geologic survey, adopt towed array or bottom streamer to explore usually at present, the wave detector of employing is the high-frequency resonant body, and frequency ratio is higher, and remolding sensitivity is lower, and is bad in the receptivity of low-band signal.For the comparatively complicated location of landform, often bigger operation ship can't be in these zone constructions, and bottom streamer also can't be constructed to this, and in these zones, the background noise in the external world is bigger in the time of construction, mainly is wind-induced water wave noise, makes the reception of signal poor.In the ocean or other waters carry out seismic prospecting, usually the requirement of construction can't be satisfied with seismoreceiver in land, just can receive vibration signal because land must be fixed on seabed or the riverbed with seismoreceiver, construct and be difficult to realization in the waters usually.Vibration signal is propagated with the signal of sound often in water, because the shear stress of water is zero, therefore in water, there is not compressional wave, the vibration signal of propagating up from the seabed can produce signal when the interface on process water and land reflection and refraction, enable volume production and give birth to certain loss, and compressional wave can enter into aqueous medium with the form of transformed wave, and more near the sea, the intensity of signal can be weak more.This just needs wave detector to have bigger working depth, to improve the sensitivity of received signal.
Summary of the invention: the purpose of this utility model just provides a kind of marine seismometer, and it can overcome the problem of using in the existing seafari that wave detector is bad in the receptivity of low-band signal, reception is poor.
For achieving the above object, the technical solution of the utility model is: design a kind of marine seismometer, its involving vibrations body and adapter, it is characterized in that: vibrating mass is fixed in the housing, vibrating mass is made of piezoelectrics, metal substrate at least, and piezoelectrics are fixed on the substrate, and substrate is fixed on the housing, piezoelectrics, metal substrate in the housing form a cavity at least, constitute the cavity vibrating mass; Adapter wherein is to be made of permeability magnetic material, adaptive coil, and permeability magnetic material with primary and secondary coil combination together; Elementaryly be connected, secondaryly be electrically connected with cable with piezoelectric.
Described cavity vibrating mass outer casing has boss.
Described shell is an acoustic window material.
Described adapter magnetic material is a soft magnetic material.
Described adaptive coil comprises one group of above output terminal at least.
Between described substrate and the housing coupling material is arranged.
Piezoelectrics in the described housing, metal substrate constitute 2-4 cavity.
The course of work of the present utility model is: piezoelectric links to each other with the adapter secondary coil, constitute resonant tank, when cavity vibrating mass outer casing or boss because when receiving the vibration wave of the water surface, can effect make it produce electric signal to piezoelectrics, produce induced field in the electrical signal online circle, by the coupling of permeability magnetic material, make secondary coil produce the induction electromotive force of same frequency, it is exported with the voltage signal form.
The utlity model has following advantage.
The utility model adopts single encapsulation, and remolding sensitivity is higher, and sealing property is relatively good, by adjusting the resonance frequency of adapter, can be operated in the darker degree of depth.Because adopt adapter to carry out the resonance frequency adjustment, the frequency of operation that can make wave detector makes the bandwidth of wave detector reach the 5Hz-1000Hz scope in lower frequency range.By adjusting geophone sensitivity, can improve the signal to noise ratio (S/N ratio) of wave detector, high-frequency signal is fainter usually, improves the reception of feeble signal, thereby improves the resolution of exploration.
Description of drawings:
Below in conjunction with the embodiment accompanying drawing the utility model embodiment is described further;
Fig. 1 is the embodiment cross-sectional view;
Fig. 2 is an embodiment surface structure synoptic diagram.
Among the figure, 1, vibrating mass; 2, adapter; 3, end cap; 4, cable; 5, shell; 6, boss; 7, piezoelectric ceramics; 8; Substrate; 9, cavity; 10, permeability magnetic material; 11, adaptive coil; 12, cone; 13, cylinder; 14, detection head.
Embodiment:
Fig. 2 is an embodiment surface structure synoptic diagram, and the embodiment shell structure is to be the structure of one for three sections by cone 12, cylinder 13 and detection head 14 parts as shown in Figure 2.
Fig. 1 is the embodiment cross-sectional view, and as shown in Figure 1, cone 12 is a segment signal output; Cylinder 13 is the adapter part; Detection head 14, internal fixation vibrating mass 1.Vibrating mass 1 is made up of piezoelectric ceramics 7, substrate 8 and cavity 9, and substrate 8 outer field shells 5 are over against there being boss 6, and boss 6 makes wave detector rely on the pressure of water that wave detector shell 5 and piezoelectric ceramics 7 are adjacent in the time of in water, guarantees that sound wave is received by piezoelectric ceramics 7; Between substrate 8 and the housing 5 coupling material is arranged, shell adopts acoustic window material to make, and makes the loss in the shell medium drop to minimum.Adapter 2 is made up of permeability magnetic material 10, adaptive coil 11, and adaptive coil 11 is on permeability magnetic material 10, and adaptive coil 11 has two level circles, and one is secondary coil; Another secondary coil.With primary and secondary coil combination together; Elementaryly be connected, secondaryly be electrically connected with cable with piezoelectric.Adapter is installed in the shell 5, and when working in the adapter water, hydraulic pressure can not make the adapter pressurized, guarantees that signal output is normal.In the end of shell 5, the end cap 3 have thimble is installed, adopt screw to be fixed, lead twines in the hole of thimble, guarantees that lead has certain stretching resistance, makes that wave detector can not pulled in the process of construction.In order to make wave detector be operated in the darker degree of depth, the encapsulation of whole wave detector must have good sealing property, and wave detector adopts integral body to encapsulate, and cable 4 bonds together with shell, and anti-sealing causes signal shorts from the seam crossing infiltration of cable and shell.
Permeability magnetic material 10 in the adapter in the utility model and adaptive coil 11 are by adjusting, and the bandwidth of wave detector reaches the 5Hz-1000Hz scope.Sensitivity, signal to noise ratio (S/N ratio) are improved.Improve the reception of feeble signal, thereby improve the resolution of exploration.
Claims (7)
1, a kind of marine seismometer, its involving vibrations body and adapter, it is characterized in that: vibrating mass is fixed in the housing, vibrating mass is made of piezoelectrics, metal substrate at least, piezoelectrics are fixed on the substrate, substrate is fixed on the housing, and piezoelectrics, metal substrate in the housing form a cavity at least, constitutes the cavity vibrating mass; Adapter wherein is to be made of permeability magnetic material, adaptive coil, and permeability magnetic material with primary and secondary coil combination together; Elementaryly be connected, secondaryly be electrically connected with cable with piezoelectric.
2, a kind of marine seismometer according to claim 1 is characterized in that: described cavity vibrating mass outer casing has boss.
3, a kind of marine seismometer according to claim 1, it is characterized in that: described shell is an acoustic window material.
4, a kind of marine seismometer according to claim 1 is characterized in that: described adapter magnetic material is a soft magnetic material.
5, a kind of marine seismometer according to claim 1 is characterized in that: described adaptive coil comprises one group of above output terminal at least.
6, a kind of marine seismometer according to claim 1 is characterized in that: between described substrate and the housing coupling material is arranged.
7, a kind of marine seismometer according to claim 1 is characterized in that: the piezoelectrics in the described housing, metal substrate constitute 2-4 cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042128 CN2724017Y (en) | 2004-06-28 | 2004-06-28 | Marine seismic wave detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042128 CN2724017Y (en) | 2004-06-28 | 2004-06-28 | Marine seismic wave detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2724017Y true CN2724017Y (en) | 2005-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420042128 Expired - Fee Related CN2724017Y (en) | 2004-06-28 | 2004-06-28 | Marine seismic wave detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2724017Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706441A (en) * | 2012-06-19 | 2012-10-03 | 威海双丰物探设备股份有限公司 | Low-frequency hydrophone |
| CN111912511A (en) * | 2020-07-27 | 2020-11-10 | 刘峙亚 | Ocean sound wave analysis device |
-
2004
- 2004-06-28 CN CN 200420042128 patent/CN2724017Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706441A (en) * | 2012-06-19 | 2012-10-03 | 威海双丰物探设备股份有限公司 | Low-frequency hydrophone |
| CN111912511A (en) * | 2020-07-27 | 2020-11-10 | 刘峙亚 | Ocean sound wave analysis device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |