CN1012220B - Suspension type eddy seismonmeter - Google Patents
Suspension type eddy seismonmeterInfo
- Publication number
- CN1012220B CN1012220B CN 87105424 CN87105424A CN1012220B CN 1012220 B CN1012220 B CN 1012220B CN 87105424 CN87105424 CN 87105424 CN 87105424 A CN87105424 A CN 87105424A CN 1012220 B CN1012220 B CN 1012220B
- Authority
- CN
- China
- Prior art keywords
- magnet
- sleeve
- wave detector
- coil
- vortex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000725 suspension Substances 0.000 title description 4
- 239000000463 material Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229920006361 Polyflon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to a geophone for overland seismic exploration. An inertial oscillation system in the geophone is composed of three vertically arranged permanent magnets, wherein the main magnet as inertial mass is arranged in a suspensible mode between the upper magnet and the lower magnet, and the magnets are provided oppositely with the same polarity; a pair of magnetic springs are formed by the acting force among the three magnets; a vortex sleeve is arranged outside the inertial oscillation system; a pair of coils are wound outside the vortex sleeve.
Description
The present invention is a kind of seismoreceiver that land exploration is used that is suitable for.Seismoreceiver is a kind of device of sense vibrations, is to hang an inertia shaking system to form in a supporting structure that rigidly fixes, and conventional product has magnetoelectric seis.The SM-6 type product that product of mentioning as United States Patent (USP) 4504932 and Dutch SENSOR company produce, its primary structure form is referring to Fig. 1.Their inertia shaking system is to be made of pair of discs shape spring (14,16) and one group of coil (9) of being suspended on therebetween.Coil is placed in the middle of the magnetic field, and when earthquake took place, seismic event imported the earth's crust into, after the ripple that reflection comes arrives seismoreceiver, wave detector shell (6) and magnetic system rigidly connected with it are vibrated with the vibration of landing ground face, and at this moment, relative motion has taken place for coil and magnet (or shell).So in coil, just produce the alternation induced potential, just can analyze to geological condition according to the electric signal of wave detector output.
Because seismoreceiver mainly is used for the sensing lengthwise movement, to the response of horizontal motion, promptly so-called transversal effect just must be managed elimination or reduced as far as possible, and conventional wave detector transversal effect is bigger.This wave detector than higher, is made the complex process of spring and wayward to the requirement of spring material, and furthermore because the rigidity of inertia shaking system medi-spring is to be difficult for regulating, quality is also determined, thereby the natural frequency of total system just is difficult for regulating.In addition, during the conventional relative magnet steel of magnetoelectric seis coil is kept in motion, generally be the output that realizes electric signal with elasticity slip ring (19) contact, this is not a kind of very reliable way for ultra-weak electronic signal.When a plurality of wave detectors linked together use, wave detector also was easy to generate electrical interference each other.
U.S. OYO company once released a kind of eddy current seismometer, its structure as shown in Figure 2, mainly be between coil (9) and magnet (7), to set up the vortex sleeve (8) that a metallic conduction material is made, coil is maintained static with respect to shell, so can connect the electric signal output line with the way of welding, thereby improved the reliability of circuit communication, reduced the mutual electrical interference of wave detector.But because the vibrational system of this product inside is made of mechanical spring (14,16) and quality (vortex sleeve), material and processing technology require high, and transversal effect shortcoming big and that the vibrational system natural frequency can't be regulated still exists.
In United States Patent (USP) the 3100292nd, once disclosed a kind of inspection shake apparatus referring to Fig. 4, this device comprises a solenoid frame (22) with non-magnet material such as polyflon making that has axial hole, be respectively equipped with magnet (4,10) at the two ends up and down of coil former, in the axial hole of coil former, be placed with one than the shorter bar magnet (7) of coil former, this bar magnet elasticity is suspended between the magnet at coil former two ends.The wave detector of this magnetic spring is than conventional wave detector handling ease, and antifatigue and impact capacity are also good slightly, but sensitivity is hanged down and the deficiency of high frequency response ability owing to there is, thereby fails to obtain on engineering to promote always.
The objective of the invention is to according to remain in the existing seismoreceiver product weak point, provide a kind of New Type Seismic Geophone of improving the inner elastomeric device, in order to the performance that improves wave detector and the effect of seismic prospecting.
Technical solution of the present invention is as described below: form inertia shaking system by three blocks of permanent magnets of longitudinally arranging, wherein main magnet is suspended and be arranged at the centre of two magnet up and down, the polarity that makes the main magnet both ends of the surface polarity with two magnet inner side ends up and down respectively is identical, so the repulsion between two magnet and the main magnet has constituted a pair of magnetic spring up and down.When wave detector is subjected to time spent of doing of external seismic event, just make up-down vibration along vortex sleeve as the main magnet of vibrational system inertial mass.Because having produced relative motion between magnetic field boundary and main magnet and the vortex sleeve will induce alternation in vortex sleeve electromotive force, comes main magnet, this induction electromotive force forms closed alternation " vortex flow " in metal sleeve, just can produce alternation " eddy current magnetic field boundary ".The eddy current magnetic field boundary of alternation affacts on its coil on every side, can induce electromotive force again in coil.
As can be seen, the amplitude of eddy current magnetic field boundary is the function of speed of related movement between main magnet and the vortex sleeve in this device, induction electromotive force in the coil is again the function of eddy current magnetic field boundary to the coil pace of change, in the middle of this " two-stage effect " taken place, reached a conclusion thus: the electric signal that is generated in fixing wave detector coil is proportional to the acceleration of shell motion.
Fig. 3 is a structure cut-open view of the present invention.
With reference to Fig. 3, suspension type eddy seismonmeter from the lining and the table form by the inertia shaking system of coaxial setting, the vortex sleeve made from the metallic conduction material (8), the coil (9) that is wrapped in a pair of differential concatenation on the vortex sleeve (8) and shell (6) etc. successively, be respectively equipped with up-down adjustment sleeve (2,12) in the upper and lower of wave detector, be provided with end cap (1) topmost, on end cap (1), be provided with printed wire and extension line hole.Two magnet (4,10) are threaded with up-down adjustment sleeve (2,12) respectively by last lower magnetic box (3,11) up and down, make two ends be subjected to the main magnet (7) of repulsion effect to be suspended in central authorities.Vortex sleeve (8) and main magnet (7) are for precision is slidingly matched, in order to reduce the transversal effect of wave detector.
Compared with the prior art, the present invention has following characteristics:
Elastic element in the present invention is the magnetic spring, and the rigidity of magnetic spring is convenient to regulate, so the just adjusting easily of the natural frequency of system, can guarantee the consistance of a collection of wave detector natural frequency like this.The magnetic spring is not than mechanical spring handling ease, and is tired, the life-span long, cost is also low.
Output characteristics of the present invention is that its high-frequency sensitivity increases along with increasing of excitation frequency by square the increasing progressively of dynamic excitation frequency on natural frequency.Decay sharp when the increase of high-frequency sensitivity helps to remedy high-frequency signal by overland propagation, thereby improved resolution of seismic prospecting.
Vortex sleeve in the suspension type eddy seismonmeter maintains static, and with inertial mass (main magnet) accurate cooperating is arranged, thereby has greatly reduced transversal effect.In addition, the damping of inertial mass is provided by vortex flow fully, and damping is not subjected to the influence of extraneous load, and no matter how wave detector is connected on the string, and damping remains constant.
Each label that accompanying drawing drew in the literary composition is represented: 1, end cap; 2, adjusted sleeve; 3, upper magnetic box; 4, go up magnet; 5, feed-through collar; 6, shell; 7, main magnet; 8, vortex sleeve; 9, coil system; 10, lower magnet; 11, lower magnetic box; 12, following regulating sleeve; 13, go up contact chip; 14, upper spring sheet; 15, following contact chip; 16, lower spring sheet; 17, upper magnet yoke; 18, lower yoke; 19, slip ring; 20, jam nut; 21, bottom, 22 coil formers.
Claims (1)
- A kind of seismoreceiver that is suitable for land seismic prospecting use, from the lining and table successively by the inertia shaking system of coaxial setting, vortex sleeve (8), be wrapped in the coil (9) of a pair of differential concatenation on the vortex sleeve (8), shell (6) and end cap (1), bottom compositions such as (21), wherein said inertia shaking system is by three blocks of permanent magnets (4 of longitudinally arranging, 7,10) constitute, main magnet (7) suspends and is located at two magnet (4 up and down, 10) centre, the upper and lower of wave detector is respectively equipped with up-down adjustment sleeve (2,12), they are by last lower magnetic box (3,11) respectively with last lower magnet (4,10) be threaded, vortex sleeve (8) is to make and maintain static with respect to wave detector shell (6) with the metallic conduction material of non-magnetic conduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105424 CN1012220B (en) | 1987-08-03 | 1987-08-03 | Suspension type eddy seismonmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105424 CN1012220B (en) | 1987-08-03 | 1987-08-03 | Suspension type eddy seismonmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031135A CN1031135A (en) | 1989-02-15 |
| CN1012220B true CN1012220B (en) | 1991-03-27 |
Family
ID=4815313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105424 Expired CN1012220B (en) | 1987-08-03 | 1987-08-03 | Suspension type eddy seismonmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012220B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046987C (en) * | 1993-03-23 | 1999-12-01 | 鲍维尔特殊地下工程公司 | Split Grabs for Well Digging |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023309B (en) * | 2010-10-29 | 2013-03-27 | 谭成忠 | Maglev electromagnetic induction cymoscope |
| AU2015387501B2 (en) * | 2015-03-25 | 2018-08-23 | Halliburton Energy Services, Inc. | Geophone with magnetic self-damping system |
| CN106840367B (en) * | 2017-03-23 | 2020-04-03 | 北京航空航天大学 | A multi-axis suspension low-frequency vibration sensor |
| CN112147715A (en) * | 2020-08-23 | 2020-12-29 | 中铁十九局集团矿业投资有限公司 | A New Type Automatically Deployed Seismic-Electric Dual-purpose Data Acquisition Device |
-
1987
- 1987-08-03 CN CN 87105424 patent/CN1012220B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046987C (en) * | 1993-03-23 | 1999-12-01 | 鲍维尔特殊地下工程公司 | Split Grabs for Well Digging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031135A (en) | 1989-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3100292A (en) | Vibration pickup | |
| US4412317A (en) | Transducer for picking up mechanical vibrations, in particular seismic waves, and a seismic measuring system including such a transducer | |
| EP1314052B1 (en) | Geophone and method of manufacturing a geophone | |
| CN102023309B (en) | Maglev electromagnetic induction cymoscope | |
| EP0434702B1 (en) | A geophone system | |
| CN200962056Y (en) | Vibration sensor based on the magnetic levitation principle | |
| CN201852944U (en) | Magnetic suspension electromagnetic induction detector | |
| US6032533A (en) | Absolute amplitude sensor device | |
| US3127775A (en) | Vibratory rate gyroscope | |
| EP2462472B1 (en) | High sensitivity geophone | |
| US2562983A (en) | Frequency-adjustable seismic wave detector | |
| US2657374A (en) | Suspension system for seismograph detectors | |
| CN1987373A (en) | Vibration sensor based on magnetic suspension principle | |
| CN1012220B (en) | Suspension type eddy seismonmeter | |
| CN2047790U (en) | Suspended eddy-current-type geophone | |
| US2303413A (en) | Seismometer | |
| US2390328A (en) | Directional seismograph pickup | |
| RU2030767C1 (en) | Seismograph | |
| US3065456A (en) | Self-orienting vibration detector | |
| CN117471563A (en) | Suspended pendulum vibration isolation device, measuring device for universal gravitational constant and its measuring method | |
| US4412452A (en) | Harmonic oscillator for measuring dynamic elastic constants of rock materials | |
| JP2805881B2 (en) | Vibration detector | |
| SU911406A1 (en) | Vertical seismic receiver | |
| RU2017175C1 (en) | Geophone | |
| JPS61137026A (en) | Vibration transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |