CN205562824U - Geophone of low distortion qxcomm technology - Google Patents
Geophone of low distortion qxcomm technology Download PDFInfo
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- CN205562824U CN205562824U CN201620329895.8U CN201620329895U CN205562824U CN 205562824 U CN205562824 U CN 205562824U CN 201620329895 U CN201620329895 U CN 201620329895U CN 205562824 U CN205562824 U CN 205562824U
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Abstract
The utility model relates to a geophone of low distortion qxcomm technology, include the shell, go up top cap, lower top cover, inertial body system, magnetic system, the inertial body system includes coil, lower coil, the heavy coil of accent, the magnetic system includes magnet, last end terminal, lower end terminal, compensation ring. To go up terminal surface note that the end terminal kept away from the magnet for terminal surface A, the magnet was kept away from to lower end terminal terminal surface note is terminal surface B, goes up terminal surface note that the coil kept away from the magnet for terminal surface C, and terminal surface note that lower coil kept away from the magnet is terminal surface D, and terminal surface C and terminal surface D lie in between terminal surface A and the terminal surface B. With the geophone scaling up or reduce, make between terminal surface A and the terminal surface B be HAB=25.4mm apart from the HAB benchmark time, the distance between terminal surface C and terminal surface A, terminal surface D and the terminal surface B satisfies 0.6mm <= SCA=SDB <= 3mm. The utility model discloses a limited coil terminal surface makes the geophone distortion degree obtain very big improvement to the distance of end terminal terminal surface, and is simultaneously minimum to the influence of sensitivity.
Description
Technical field
This utility model relates to a kind of geophone, particularly relates to a kind of for intricately condition (such as underground, ocean etc. are difficult to the most embedding) exploration, seismic survey and the interior magnetic inductive omnidirectional geophone of engineering survey.
Background technology
Along with geophysical exploration to deep-sea, deep strata and intricately condition extend, for solving embedding and complicated coupled problem, in industry, occur in that specification, miscellaneous omnidirectional geophone.But thing followed problem is existing omnidirectional geophone cannot provide higher exploration resolution, originally the most promising omnidirectional technology is limited by very large in application: prior art cannot make a breakthrough in the distortion of omnidirectional's geophone, its harmonic distortion is all in≤0.6%～0.9% (17.8mm/s excitation) scope, this just cannot realize high accuracy and explore (in general, its resolution of cymoscope that the distortion factor is the lowest is the highest, also more the small and weak high-frequency signal being submerged in strong noise of low-frequency existed in working is beneficially differentiated, that is there is bigger dynamic range)；On the other hand, high-resolution exploration has again the widely market demand, according to the development trend of technology and equipment the most of the same trade, and an urgent demand of seafari, the demand of low distortion omnidirectional geophone is immeasurable.
Owing to the inherent character of elastomeric material and coasting body quality are by natural phenomenas such as terrestrial gravitations, make coasting body that elastomeric material carried relative to the magnetic center of magnetic system in omnidirectional's angular range, in addition to the symmetrical displacement operating angle (such as horizontal level) of definition, it is non-symmetric displacement work.This natural phenomena, the asymmetric franchise and the harmonic distortion that easily produce such as frequency, sensitivity index increase (harmonic distortion is to produce, with an incoming frequency, a kind of non-linear distortion that harmonic wave is characterized).
In general, when natural frequency is more than 18Hz, geophone all can obtain satisfied data at omnidirectional's angle acquisition and detection source signal；When natural frequency is less than 18Hz, geophone can be in the natural frequency of omnidirectional's angle work between 10Hz～18Hz, but along with the reduction of natural frequency, the index such as the frequency franchise of omnidirectional's angle, sensitivity franchise, harmonic distortion will significantly increase.In the past few decades, omnidirectional's geophone that natural frequency is 13Hz～15Hz is mainly studied by people, but no matter selecting great natural frequency, the target pursued is all that natural frequency is the least, and index franchise is the narrowest, harmonic distortion is the lowest.
Fig. 1 is the structural representation of omnidirectional's geophone of prior art, is divided into structure, magnetic circuit and circuit three part.Decompose as follows:
1, structure:
(1) component: a 1. magnetic system.The most from bottom to top, lower pole shoe 123 cap is embedded in the lower end of magnet 115；Magnet 115 upper end embeds in upper pole shoe 113 cap；Upper pole shoe 113 upper surface is placed with insulating trip 108.2. a coasting body system.The most from bottom to top, inserting rack 118 is wound with lower coil 117；Inserting rack 118 is wound with tune weight coil 116 with the middle part of wire reeling rack 111 bonding；Wire reeling rack 111 is wound with coil 112；Inserting rack 118 lower end is embedded with lower spring sheet 121 and lower snap ring 124；Wire reeling rack 111 upper end is embedded with spring leaf 110 and upper snap ring 102.
(2) constitute and principle: magnetic system is placed in coasting body system, lower top cover 119, upper top cover 101 (lower top cover 119 and upper top cover 101 head in the blind hole of lower pole shoe 123 and upper pole shoe 113 respectively) and shell 125 form geophone.Coasting body system in geophone is carried coasting body by the upper spring leaf 110 on coasting body together with lower spring sheet 121, relative to the upper and lower relative movement of magnetic system, receives vibration signal.
2, magnetic circuit: (1) forms: magnetic circuit is by magnetic system and shell 125, and is made up of the annulus gap magnetic field formed between magnetic system and shell 125.
(2) principle: by upper coil 112 and the lower coil 117 of positive and negative coiling on coasting body, carried together with lower spring sheet 121 by upper spring leaf 110, move up and down in annulus gap magnetic field relative to magnetic system, receive vibration signal, cutting magnetic line, induce the signal of telecommunication being scalar index with sensitivity and the distortion factor, the circuit of geophone export.
3, circuit: binding post 104 and binding post 105 are respectively 2 electrodes of geophone signal of telecommunication output.The circuit loop of the signal of telecommunication is: binding post 104 soldering is in upper interior contact spring 103；In upper contact spring 103 again with upper pole shoe 113, magnet 115, lower pole shoe 123, lower spring sheet 121 sequentially following contacts；The lower wire end of lower spring sheet 121 soldering lower coil 117；In lower coil 117, leading-out terminal insulation is by adjusting weight coil 116 surface to connect with upper coil 112 lower wire end；On upper coil 112, leading-out terminal soldering is on upper spring leaf 110；Upper spring leaf 110 is dielectrically separated from upper pole shoe 113 by insulating trip 108, and contacts with upper outer contacting reed 107；The soldering of upper outer contacting reed 107 is in binding post 105.
In conjunction with composition and the principle of above-mentioned omnidirectional geophone, it is presently believed that cause the reason of harmonic distortion to mainly include two aspects that one is the harmonic distortion produced by elastomeric material, referred to as elastic distortion；Two is the harmonic distortion produced by magnetic material, referred to as field distortion.
One, for elastic distortion:
The reed shaking cymoscope confessedly is the reason producing elastic distortion, because have developed the structure of several different geophone reed, it is intended to reduce the generation of extra harmonic wave, be included in the reed disclosed in U.S. Patent number US5555222 and US4623991.Although reducing in terms of harmonic distortion more or less effect, but the reed newly developed can not be fully solved problem, and residual distortion has significantly impact to the resolution of input signal.And for omnidirectional work the geophone that natural frequency is 10Hz～18Hz for, asymmetric due to produced by gravitational effects, be allowed to break through further need research.
Two, for field distortion:
Field distortion is due in omnidirectional's operating angle, it is impossible to caused in ensureing coil and the magnetic field perpendicular cuts magnetic line of force of geophone or being in uniform parallel magnetic field.
In order to obtain highly sensitive effective output, almost all of design all with magnetic center to the biggest spread loop length of referred to as principle and the ratio of pole shoe length (wherein pole shoe length is the length from that one end relative with one end of magnet contact to this pole shoe), but the consequence so brought to be harmonic distortion the biggest.Fig. 1 is the structural representation of omnidirectional's geophone of prior art, loop length is significantly greater than pole shoe length, true distortion radar map such as Fig. 2 A and Fig. 2 B of omnidirectional's geophone of this class formation, harmonic distortion very big (harmonic distortion≤0.8%, 17.8mm/s encourages).
United States Patent (USP) US5469408 (ZL95195123.8), employs the loop length design less than pole shoe length.But this technology does not accounts for geophone that natural frequency is 10Hz～18Hz under omnidirectional's working environment, coil is relative to the impact on harmonic distortion of the unsymmetry of magnetic center, and be only for geophone when horizontal or vertical fixed angle works, the relative displacement making coil is symmetrical with magnetic center, and the relative displacement of coil the least (peak-peak displacement≤2mm), to utilize uniform magnetic field to greatest extent, reduce the purpose of the distortion factor.Giving its geophone provided harmonic distortion figure when optimum position in this patent, the representative value of harmonic distortion is 0.02%.People are under the enlightenment that this technology is brought, attempt constantly increasing the coil relative displacement relative to magnetic center, to reducing the harmonic distortion of omnidirectional's geophone, but effect is the most undesirable, all the time fail to find and make the significantly reduced critical point of harmonic distortion, it is impossible to meet the requirement to harmonic distortion of omnidirectional's geophone.
Utility model content
For solving the problem that in above-mentioned background, omnidirectional's geophone harmonic distortion is high, this utility model provides a kind of low distortion omnidirectional geophone.
Design philosophy of the present utility model is that geophone is when arbitrarily angled work, the relative displacement making coil is symmetrical with magnetic center, utilization to uniform magnetic field leaves the design of bigger redundancy, it is possible to obtain the effect significantly reducing harmonic distortion in the case of having little to no effect the sensitivity of geophone.
The technical solution of the utility model is:
A kind of low distortion omnidirectional geophone, including shell, upper top cover, lower top cover, coasting body system, magnetic system；Described coasting body system includes coil, lower coil, tune weight coil；Described magnetic system includes magnet, upper pole shoe, lower pole shoe, compensates ring；Described upper pole shoe is designated as end face A away from the end face of magnet, and lower pole shoe is designated as end face B away from the end face of magnet；Upper coil is designated as end face C away from the end face of magnet, and lower coil is designated as end face D away from the end face of magnet；It is characterized in that described end face C and end face D are between end face A and end face B；Geophone scaled up or reduces, making distance H between described end face A and end face BABBenchmark turns to HABDuring=25.4mm, the distance between distance, end face D and end face B between end face C and end face A meets 0.6mm≤SCA=SDB≤3mm。
Above-mentioned SCA=SDBBest results during=1.1mm, harmonic distortion is down to minimum.
Above-mentioned geophone is applicable to omnidirectional's angle working environment that natural frequency is 10Hz～18Hz.
Above-mentioned geophone Detection results in omnidirectional's angle working environment that natural frequency is 13Hz～15Hz is optimal.
The beneficial effects of the utility model are:
1, this utility model considers that geophone is under omnidirectional's working environment, especially under omnidirectional's working environment of low frequency (natural frequency is 10Hz～18Hz), coil is relative to the impact on harmonic distortion of the unsymmetry of magnetic center, determine coil the corresponding pole shoe of tip to face distance end face between distance more than 0.6mm, in the case of loss very small amount sensitivity, the distortion factor is greatly improved.
2, S is worked asCA=SDBDuring=0.6mm, harmonic distortion drastically reduces to≤0.5% (17.8mm/s excitation)；Work as SCA=SDBDuring=1.1mm, harmonic distortion is further reduced to≤0.3% (17.8mm/s excitation).
3, geophone of the present utility model is applicable to omnidirectional's working environment that natural frequency is 10Hz～18Hz, natural frequency be 13Hz～15Hz omnidirectional's working environment in Detection results optimal.
Accompanying drawing explanation
Fig. 1 is the structural representation of omnidirectional's geophone of prior art；Label in figure: 101 upper top covers, snap ring on 102, on 103 in contact spring, 104,105 binding posts, 106 circuit boards, outer contacting reed on 107,108 insulating trips, sealing ring on 109, spring leaf on 110,111 wire reeling racks, coil on 112；Pole shoe on 113,115 magnets, 116 adjust weight coil, 117 lower coil, 118 inserting racks, 119 times top covers, 120 lower seal, 121 lower spring sheets, 122 times contact chips, 123 times pole shoes, 124 times snap rings, 125 shells；
Fig. 2 A is the distortion radar map (5.08mm/s excitation) of existing omnidirectional geophone；
Fig. 2 B is the distortion radar map (17.8mm/s excitation) of existing omnidirectional geophone；
Fig. 3 is the structural representation of omnidirectional of the present utility model geophone；Label in figure: 301 upper top covers, snap ring on 302, interior contact spring, 304,305 binding posts, 306 circuit boards, outer contacting reed on 307,308 spring shims, 309 insulating trips, spring leaf on 310, sealing ring on 311 on 303；312 wire reeling racks, coil on 313；Pole shoe on 314,315 compensate ring, 316 magnets, and 317 adjust weight coil, 318 lower coil, 319 times pole shoes, 320 inserting racks, 321 times top covers, 322 lower seal, 323 lower spring sheets, 324 times contact chips, 325 times snap rings, 326 shells；
Fig. 4 A is distortion radar map (S of the present utility modelCA=SDB=0.6mm, 5.08mm/s encourage)；
Fig. 4 B is distortion radar map (S of the present utility modelCA=SDB=0.6mm, 17.8mm/s encourage)；
Fig. 4 C is distortion radar map (S of the present utility modelCA=SDB=1.1mm, 5.08mm/s encourage)；
Fig. 4 D is distortion radar map (S of the present utility modelCA=SDB=1.1mm, 17.8mm/s encourage).
Detailed description of the invention
With detailed description of the invention, this utility model is further elaborated below in conjunction with the accompanying drawings.
This utility model provides a kind of low distortion omnidirectional geophone, including wire reeling rack 312, upper coil 313, inserting rack 320, lower coil 318, adjusts weight coil 317, magnet 316, insulating trip 309, upper pole shoe 314, lower pole shoe 319, upper spring leaf 310, lower spring sheet 323, upper snap ring 302, lower snap ring 325, upper top cover 301, lower top cover 321, shell 326, spring shim 308, binding post 304, binding post 305, upper interior contact spring 303, upper outer contacting reed 307；
Two binding posts 304 and 305 are respectively 2 electrodes of omnidirectional's geophone signal of telecommunication output；The circuit loop of the signal of telecommunication is that binding post 304 soldering is in upper interior contact spring 303；In upper contact spring 303 again with upper pole shoe 314, magnet 316, lower pole shoe 319, lower spring sheet 323 sequentially following contacts；The lower wire end of lower spring sheet 323 soldering lower coil 318；In lower coil 318, leading-out terminal insulation is by adjusting weight coil 317 surface to connect with upper coil 313 lower wire end；On upper coil 313, leading-out terminal soldering is on upper spring leaf 310；Upper spring leaf 310 is dielectrically separated from upper pole shoe 314 by insulating trip 309, and contacts with upper outer contacting reed 307；The soldering of upper outer contacting reed 307 is in binding post 305.
Magnetic system of the present utility model: be cased with outside magnet 316 compensating ring 315, the lower end of magnet 316 embeds in lower pole shoe 319 cap, and the upper end of magnet 316 embeds in upper pole shoe 314 cap；Upper pole shoe 314 upper surface is placed with insulating trip 309；
Coasting body system of the present utility model: the most from bottom to top, inserting rack 320 lower end is embedded with lower spring sheet 323 and lower snap ring 325；Inserting rack 320 is wound with lower coil 318, and inserting rack 320 is wound with tune weight coil 317 with the middle part of wire reeling rack 312 bonding；Wire reeling rack 312 is wound with coil 313；Wire reeling rack 312 upper end is embedded with spring leaf 310 and upper snap ring 302；
Magnetic system is placed in coasting body system, lower top cover 321, upper top cover 301 (lower top cover 321 and upper top cover 301 head in the blind hole of lower pole shoe 319 and upper pole shoe 314 respectively) and shell 326 form omnidirectional's geophone.
Work process of the present utility model is: the coasting body system in omnidirectional's geophone is carried coasting body by the upper spring leaf 310 on coasting body together with lower spring sheet 323, relative to the upper and lower relative movement of magnetic system, receives vibration signal；By upper coil 313 and the lower coil 318 of positive and negative coiling on coasting body, carried together with lower spring sheet 323 by upper spring leaf 310, move up and down in annulus gap magnetic field relative to magnetic system, receive vibration signal, cutting magnetic line, induce the signal of telecommunication being scalar index with sensitivity and the distortion factor, the circuit of omnidirectional's geophone export.
In order on the premise of ensureing omnidirectional's earthquake geophone sensitivity, reduce the harmonic distortion of omnidirectional's geophone as far as possible, as it is shown on figure 3, this utility model to the distance between upper surface (end face A) away from upper pole shoe 314, the upper surface (end face C) of upper coil 313, lower coil 318 the lower surface (end face B) away from lower pole shoe 319, the lower surface (end face D) between distance made defined below:
First geophone scaled up or reduce, making distance H between end face A and end face BABBenchmark turns to HABDuring=25.4mm, then the distance between distance, end face D and the end face B between end face C and end face A meets 0.6mm≤SCA=SDB≤ 3mm, and end face C and end face D (length i.e. going up coil is less than the length of upper pole shoe, and the length of lower coil is less than the length of lower pole shoe) between end face A and end face B.
1, S is worked asCA=SDBDuring=0.6mm, harmonic distortion of the present utility model can be down to:
(1) harmonic distortion≤0.2% (5.08mm/s excitation), as shown in Figure 4 A, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve；
(2) harmonic distortion≤0.45% (17.8mm/s excitation), as shown in Figure 4 B, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve.
2, S is worked asCA=SDBWhen=1.1, harmonic distortion of the present utility model can be down to:
(1) harmonic distortion≤0.1% (5.08mm/s excitation), as shown in Figure 4 C, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve；
(2) harmonic distortion≤0.2% (17.8mm/s excitation), as shown in Figure 4 D, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve.
3, S is worked asCA=SDBWhen being gradually increased in [1,3] interval, harmonic distortion of the present utility model is not changed in substantially, distortion curve figure and SCA=SDBThe distortion curve figure of=1.1mm is identical, and loss of sensitivity the most of the present utility model is minimum；But, work as SCA=SDBDuring ＞ 3mm, this utility model sensitivity declines, and can not meet exploration requirement, and now the distortion factor is the most meaningless.
And the harmonic distortion of omnidirectional's geophone of prior art is:
(1) harmonic distortion≤0.25% (5.08mm/s excitation), as shown in Figure 2 A, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve；
(2) harmonic distortion≤0.8% (17.8mm/s excitation), as shown in Figure 2 B, in figure, 90 °, 270 ° is core body horizontal level to corresponding distortion curve.
Note: above distortion curve figure all carries out distortion factor detection the data obtained according to GB/T24260-2009 to omnidirectional's geophone and generates.
Claims (4)
1. a low distortion omnidirectional geophone, including shell, upper top cover, lower top cover, inertia system
System, magnetic system；Described coasting body system includes coil, lower coil, tune weight coil；Described magnetic system
Including magnet, upper pole shoe, lower pole shoe, compensate ring；Described upper pole shoe is designated as end face A away from the end face of magnet,
Lower pole shoe is designated as end face B away from the end face of magnet；Upper coil is designated as end face C away from the end face of magnet, rolls off the production line
Enclose the end face away from magnet and be designated as end face D；It is characterized in that:
Described end face C and end face D is between end face A and end face B；
Geophone scaled up or reduces, making distance H between described end face A and end face BAB
Benchmark turns to HABDuring=25.4mm, distance, end face D and end face B between end face C and end face A it
Between distance meet 0.6mm≤SCA=SDB≤3mm。
A kind of low distortion omnidirectional the most according to claim 1 geophone, it is characterised in that: institute
State SCA=SDB=1.1mm.
A kind of low distortion omnidirectional the most according to claim 2 geophone, it is characterised in that: institute
The natural frequency stating omnidirectional's geophone is 10Hz～18Hz.
A kind of low distortion omnidirectional the most according to claim 3 geophone, it is characterised in that: institute
The natural frequency stating omnidirectional's geophone is 13Hz～15Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329895.8U CN205562824U (en) | 2016-04-19 | 2016-04-19 | Geophone of low distortion qxcomm technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329895.8U CN205562824U (en) | 2016-04-19 | 2016-04-19 | Geophone of low distortion qxcomm technology |
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| CN205562824U true CN205562824U (en) | 2016-09-07 |
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| CN201620329895.8U Withdrawn - After Issue CN205562824U (en) | 2016-04-19 | 2016-04-19 | Geophone of low distortion qxcomm technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866830A (en) * | 2016-04-19 | 2016-08-17 | 东莞市达耐美机电科技有限公司 | Low distortion omnidirectional seismometer |
-
2016
- 2016-04-19 CN CN201620329895.8U patent/CN205562824U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866830A (en) * | 2016-04-19 | 2016-08-17 | 东莞市达耐美机电科技有限公司 | Low distortion omnidirectional seismometer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160907 Effective date of abandoning: 20180202 |