CN2646724Y - Moving-coil type high sensitivity geophone - Google Patents
Moving-coil type high sensitivity geophone Download PDFInfo
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- CN2646724Y CN2646724Y CN 03262650 CN03262650U CN2646724Y CN 2646724 Y CN2646724 Y CN 2646724Y CN 03262650 CN03262650 CN 03262650 CN 03262650 U CN03262650 U CN 03262650U CN 2646724 Y CN2646724 Y CN 2646724Y
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- magnet steel
- high sensitivity
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Abstract
The utility model relates to a moving-coil geophone with high sensitivity comprising a coil wound on the coil rack, an alnico arranged in the coil rack, magnetic shoes arranged on both ends of the alnico, a leaf spring arranged on the end of the coil rack, and a compensated ring arranged between the alnico and the coil rack. Wherein, the number of turns of coil is 1600 to 2000 turns, the enamel wire of winding coil has a wire diameter of 0.050 to 0.065 mm, the coercive force of alnico Hcj is more than 1105 KA per m, the flux density Br is larger than 1.281T, and the magnetic energy product(BH) m is larger than 305GJ per m3. As the assembly is improved, additionally the compensated ring can automatically compensate the magnetic loss of the magnetic circuit, the sensitivity of the geophone and the damp is greatly improved. The utility model is in particular suitable for the geophone with 20 HZ.
Description
Technical field
The utility model relates to a kind of seismoreceiver, a kind of specifically high sensitivity, big damping moving-coil type seismoreceiver.
Background technology
Seismoreceiver has been widely used in field of seismic exploration such as oil field, coal.At some geographical environments abominable and oil gas store dark, than areas with complicated, the frequency characteristic of seismoreceiver, sensitivity, anti-interference, signal to noise ratio (S/N ratio) are had higher requirement.At present, at home the moving-coil type seismoreceiver that uses in the seismic prospecting process in oil gas, oil field comprise one on the coil former coil, be positioned at the magnet steel of coil former and place the upper and lower magnetic boots at magnet steel two ends, respectively be provided with spring leaf at the two ends of coil.This moving-coil geophone is owing to be subjected to the influence of material such as self coil, magnetic circuit and magnet steel, magnetic boots and structure, causes that its sensitivity is lower, damping is little.The sensitivity of wave detector is low, is unfavorable for the collection of wavelet energy; And damping is little, can to the compacting of low frequency energy, acquired signal frequency band widen and the raising of wavelet dominant frequency brings very big influence, thereby reduced the resolution of seismoreceiver, anti-interference and signal to noise ratio (S/N ratio) ability.In the present process of seismic exploration practically, in order to explore out the situation of matter structure more truly, obtain seismic prospecting effect preferably, for conventional seismoreceiver, often use a large amount of strings, cause equipment disposition many, thereby strengthened economic cost to geologic prospecting, increase the workload of construction team, had a strong impact on the efficient of seismic prospecting.
Summary of the invention
Technical problem to be solved in the utility model is improved above-mentioned prior art, and the moving-coil type seismoreceiver of a kind of high sensitivity, big damping is provided.
The technical scheme that addresses the above problem is: the moving-coil type high sensitivity earthquake wave detector that is provided comprise one on the coil former coil, be positioned at the magnet steel of coil former and place the upper and lower magnetic boots at magnet steel two ends, be provided with spring leaf in the end of coil former.Improvements of the present utility model are to be provided with a compensated loop between magnet steel and coil former; The number of turn of said coil is 1600～2000 circles, and the enameled wire line of coiling directly is 0.050～0.065mm; The coercivity H j of said magnet steel＞1105KA/m, magnetic flux density Br＞1.281T, magnetic energy product (BH) m＞305KJ/m3.Wave detector is when being given a shock, and coil shakes and cutting magnetic line thereupon, thereby changes vibration signal into electric signal.Improve owing to carried out above-mentioned assembly, the compensated loop magnetic loss of compensation magnetic automatically in addition, thus the sensitivity of wave detector and damping are greatly improved.It is 10～30 hertz seismoreceiver that the utility model is suitable for frequency, is particularly suitable for frequency and is 20 hertz moving-coil type seismoreceiver.
For 20 hertz moving-coil type seismoreceiver, the number of turn of above-mentioned coil is 1780～1820 circles, and the enameled wire line of coiling directly is 0.058～0.060mm.
Above-mentioned magnet steel and compensated loop are preferably selected neodymium iron boron for use.
Compared with prior art, the utility model can effectively improve the collection of wavelet energy, the resolution of suppressing low frequency energy, raising seismoreceiver, can reduce the string quantity of using in the seismic prospecting process again, thereby the labour intensity and the executive cost that alleviate the worker reduce cost, enhance productivity.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Accompanying drawing has provided the structural drawing that the utility model is used for 20 hertz of seismoreceivers.As shown in the figure: seismoreceiver is mainly by coil former 1, spring leaf 2, magnet steel 3, parts such as two magnetic boots 4, compensated loop 5, upper and lower vinyl cover 6,7 and iron shells 8, coil 9 are formed up and down.Wherein coil 9 employing diameters are the enameled wire coiling of 0.060mm, and coil turn is 1800 circles.Magnet steel 3 places within the coil former 1, and it forms a closed magnetic path with two magnetic boots 4 up and down and the compensated loop 5 that is enclosed within magnet steel 3 outsides; Magnet steel 3 adopts NdFeB material, increases compensated loop 5 magnetic loss of compensation magnetic automatically.Two spring leafs 2 respectively by clamping up and down between vinyl cover 6,7 and the magnetic boots 4, the both ends of coil former 1 are stuck on the spring leaf 2, constitute a moving-coil structure.The sensitivity of this wave detector is 2～3 times of existing similar wave detector, and damping can reach more than 0.8.
Claims (3)
1, a kind of moving-coil type high sensitivity earthquake wave detector, comprise a coil (9) on the coil former (1), be positioned at the magnet steel (3) of coil former (1) and place the magnet steel two ends on, following magnetic boots (4), be provided with spring leaf (2) in the end of coil former (1), it is characterized in that, be provided with a compensated loop (5) between described magnet steel (3) and the coil former (1), the number of turn of described coil (9) is 1600～2000 circles, the enameled wire line of coiling (9) directly is 0.050～0.065mm, the coercivity H j of described magnet steel＞1105KA/m, magnetic flux density Br＞1.281T, magnetic energy product (BH) m＞305KJ/m
3
2, moving-coil type high sensitivity earthquake wave detector as claimed in claim 1 is characterized in that the number of turn of described coil (9) is 1780～1820, and the enameled wire line of coiling directly is 0.058～0.060mm.
3, moving-coil type high sensitivity earthquake wave detector as claimed in claim 1 or 2 is characterized in that, described magnet steel (3) and compensated loop (5) adopt neodymium iron boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262650 CN2646724Y (en) | 2003-08-21 | 2003-08-21 | Moving-coil type high sensitivity geophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262650 CN2646724Y (en) | 2003-08-21 | 2003-08-21 | Moving-coil type high sensitivity geophone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2646724Y true CN2646724Y (en) | 2004-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03262650 Expired - Fee Related CN2646724Y (en) | 2003-08-21 | 2003-08-21 | Moving-coil type high sensitivity geophone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2646724Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408596B (en) * | 2008-11-28 | 2010-05-12 | 清华大学 | Method and device for measuring electrical pure iron coercive force and relative magnetic permeability of weak magnetic material |
| CN101241191B (en) * | 2007-11-21 | 2010-08-11 | 中南大学 | Method for enlarging moving-coil geophone magnetostatic field and a moving-coil geophone |
| CN102879809A (en) * | 2012-09-19 | 2013-01-16 | 威海双丰物探设备股份有限公司 | single-point high-sensitivity detector |
| CN103235336A (en) * | 2013-04-23 | 2013-08-07 | 涿州昌迪石油仪器有限公司 | Broadband moving-coil earthquake detector |
| CN105824045A (en) * | 2016-05-10 | 2016-08-03 | 西安森舍电子科技有限责任公司 | Geophone with low frequency, large damping and high sensitivity |
| CN106019362A (en) * | 2016-05-23 | 2016-10-12 | 中国科学院地质与地球物理研究所 | Moving coil type low-frequency expanded geophone |
-
2003
- 2003-08-21 CN CN 03262650 patent/CN2646724Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241191B (en) * | 2007-11-21 | 2010-08-11 | 中南大学 | Method for enlarging moving-coil geophone magnetostatic field and a moving-coil geophone |
| CN101408596B (en) * | 2008-11-28 | 2010-05-12 | 清华大学 | Method and device for measuring electrical pure iron coercive force and relative magnetic permeability of weak magnetic material |
| CN102879809A (en) * | 2012-09-19 | 2013-01-16 | 威海双丰物探设备股份有限公司 | single-point high-sensitivity detector |
| CN103235336A (en) * | 2013-04-23 | 2013-08-07 | 涿州昌迪石油仪器有限公司 | Broadband moving-coil earthquake detector |
| CN105824045A (en) * | 2016-05-10 | 2016-08-03 | 西安森舍电子科技有限责任公司 | Geophone with low frequency, large damping and high sensitivity |
| CN106019362A (en) * | 2016-05-23 | 2016-10-12 | 中国科学院地质与地球物理研究所 | Moving coil type low-frequency expanded geophone |
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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 |