CN2502283Y - Feedback wide frequency band seisomometer - Google Patents
Feedback wide frequency band seisomometer Download PDFInfo
- Publication number
- CN2502283Y CN2502283Y CN 01260790 CN01260790U CN2502283Y CN 2502283 Y CN2502283 Y CN 2502283Y CN 01260790 CN01260790 CN 01260790 CN 01260790 U CN01260790 U CN 01260790U CN 2502283 Y CN2502283 Y CN 2502283Y
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- geophone
- spring
- connecting rod
- mass
- reaction type
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Abstract
The utility model discloses a feedback wide frequency band seisomometer, which consists of a shaking collection machine and a set of electronic feedback system and is characterized in that the shaking collection machine is a three directional shaking collection machine which is arranged in an underpan combining an upward and downward vertical, a transmeridional and a north south trending shaking collection machines; and the electronic feedback system consists of an amplifier, a feedback component, a compensation network, a difference drive, etc. The seismograph has the advantages of high sensitiveness, wide frequency range, wide range of dynamic conditions and good linearity, applicability to wide frequency range record in local digital platform, moving wide frequency range and wide frequency range seismic array.
Description
Technical field
The design belongs to a kind of seismometer, relates in particular to a kind of reaction type broadband seismometer.
Background technology
At present the structure of broadband seismometer commonly used is non-reaction type, its design feature be the level branch to vertical branch to discrete placement; Level is divided to the form that all adopts horizontal pendulum, vertically divides to then adopting two hammer pressure plate formula structures or press that La ' Coste triangular structure of right angle designs.This makes that instrument is bulky, the cycle is adjusted difficulty, instrument zero is unstable; In addition, what its follow-up amplifying circuit adopted is discrete component, so failure rate is higher; And limited by the instrument self-condition, can only be applied to the situation of analog record.The patent No. 99237059 discloses a kind of seismometer of reaction type structure, adopts the displacement type transducing, but mechanism's complexity of this seismometer, the manufacturing cost costliness has influenced it and has applied.
Summary of the invention
The design's purpose is providing a kind of reaction type broadband seismometer, and this seismometer is highly sensitive, bandwidth, dynamic range is big, the linearity good, is applicable to that zone digit platform net makes wide-band record, also can use in the mobile broadband and the broadband array simultaneously.
For achieving the above object, a kind of reaction type broadband seismometer that the design provides, form by a geophone and a cover electronic feedback system, it is characterized in that, this geophone is a three-component geophone, vertically be integral the ground device on a chassis, wherein up and down by one to, two horizontal vibration sensors of an East and West direction and a north-south
Vertical constituting to geophone: magnet is connected with instrument stand by screw, be connected and fixed the support of geophone on it by bolt, pendular body is connected with crossbeam by cross sheet spring, the preceding lower end of mass is a connecting rod, the middle part of connecting rod is the main coil frame, coaxial each one group of working coil and the tickler that twining on it; The middle part of connecting rod is the secondary coil frame, is twining one group of calibration coil on it; Framework upper is provided with the leaf spring, and an end of this leaf spring is fixed on the framework, and the crooked backward quality of connection piece of the other end, framework are provided with the cycle adjustment screw that changes the geophone Machine cycle;
Constituting of horizontal vibration sensor: magnet is connected with instrument base by screw, is being connected and fixed the support of geophone on it by bolt, pendular body by cross sheet spring, hang spring and be connected with support with hang spring; The preceding lower end of mass is a connecting rod, is the main coil frame in the bottom of connecting rod, coaxial each one group of working coil and the tickler that twining on it; The connecting rod middle part is the secondary coil frame, is twining one group of calibration coil on it; On the top of connecting rod is mass, and mass hangs by hanging spring, hang spring, and is connected with support by hanging spring, hangs the cycle adjustment screw that spring is provided with change geophone Machine cycle;
Its electronic feedback system is made up of amplifier, feedback component, corrective network and difference driver etc.
Adjust screw and be arranged on pendulum mass front end upper right side the zero point of change geophone initial zero.
On support and crossbeam, be respectively equipped with the lock-screw of locking mass, support and cross sheet spring.
The instrument stand bottom is provided with three horizontal adjustment base angles and adjustment level spirit bubble.
Description of drawings
Also in conjunction with the accompanying drawings the design is described further with embodiment below, wherein:
Fig. 1 is the design's inner structure schematic top plan view;
Fig. 2 A is that the design is vertically to the geophone front view;
Fig. 2 B is that the design is vertically to the geophone side view;
Fig. 2 C is that the design is vertically to the geophone vertical view;
Fig. 3 A is the design's horizontal vibration sensor front view;
Fig. 3 B is the design's horizontal vibration sensor side view;
Fig. 3 C is the design's horizontal vibration sensor vertical view;
Fig. 4 is the design's electronic feedback system synoptic diagram.
Embodiment
See also Fig. 1, this figure has shown the design's inner structure from depression angle.Three geophones 2,3,4 are set on circular base plate 1 with dividing equally angle, wherein geophone 2 be Dong-Xi divide to horizontal vibration sensor, geophone 3 be south-north divide to horizontal vibration sensor, geophone 4 be last-following minute to geophone, from a structural point, the structure of geophone 2,3 is identical, and the structure of geophone 4 is then different.
Vertically the structure to geophone sees also Fig. 2 A, 2B and 2C.Magnet 24 is made for permeability magnetic material, and the middle part of its one side offers circular port, and magnet 24 is connected with instrument stand by screw, is being connected and fixed the support 217 of geophone on it by bolt 215, and pendular body 26 is connected with crossbeam 213 by cross sheet spring 212.The preceding lower end of mass 26 is a connecting rod 214, and the middle part of connecting rod 214 is main coil frames 25, and coaxial each one group of working coil and the tickler that twining on it, this main coil frame 25 are arranged in the circular port on the magnet with can move freely; The middle part of connecting rod 214 is secondary coil frames, is twining one group of calibration coil 211 on it; Connecting rod 214 tops are provided with leaf spring 27, and an end of this leaf spring 27 is fixed on the connecting rod 214, the crooked backward quality of connection piece 26 of the other end; Mass 26 responsive extraneous vibrations, and convert this vibration the tangential movement of working coil to respect to magnet 24 by leaf spring 27; Framework is provided with cycle adjustment screw 21 by changing the Machine cycle of leaf spring 27 stiffness change geophones; Pendulum mass front end upper right side is provided with and adjusts screw 28 zero point, by changing the initial zero of connecting rod 214 with respect to the position change geophone of magnet steel mouth; Support is provided with lock- screw 22,29, and offside closely is connected mass 26 with support 217, lock-screw 23, the 210 offsides locking cross sheet spring that is provided with on the crossbeam, and making it does not have relative motion with respect to framework, to guarantee transportation safety.
The structure of horizontal vibration sensor sees also Fig. 3 A, 3B and 3C.Magnet 34 is made for permeability magnetic material, the middle part of its one side offers circular port, magnet 39 is connected with instrument base by trip bolt, is being connected and fixed the support 312 of geophone on it by bolt, mass 315 by cross sheet spring 11, hang spring 33 and be connected with support 312 with hang spring 313.The preceding lower end of mass 315 is a connecting rod 38, is main coil frames 310 in the bottom of connecting rod 38, coaxial each one group of working coil and the tickler that twining on it; Connecting rod 38 middle parts are secondary coil frames, are twining one group of calibration coil 37 on it; On the top of connecting rod 38 are masses 315, and mass 315 hangs by hanging spring 33, hang spring 313, and is connected with support 312 by hanging spring 33; Mass 315 responsive extraneous vibrations, and drivening rod 38 motions convert horizontal extraneous vibration the tangential movement of working coil frame 310 with respect to magnet 39 to; Change the Machine cycle that hang springs change geophones by the cycle adjustment screw 31 that is arranged on the framework; Adjust screw 35 zero point by changing the initial zero of connecting rod 38 with respect to the position change geophone of magnet steel mouth; Lock-screw 32 is used to lock mass 315, lock-screw 31,36 offsides locking cross sheet spring, and making it does not have relative motion with respect to support, to guarantee transportation safety.
The design's geophone is connected as shown in Figure 4 with electronic feedback system.Because ground motion, working coil a cutting magnetic line in magnet produces induction electromotive force; This electrical signal of reaction is through prime amplifier b, signal after the enhancing enters feedback network, in this network, strengthened than weak signal in to signal by compensator-amplifier unit c, promptly produce feedback signal, this feedback signal applies feedback moment by tickler d to motion pendulum mass (being mass), thereby finishes the electrical feedback function.Because this feedback is the velocity profile negative feedback, in the natural vibration period that has objectively prolonged geophone, extended to 20 seconds through feedback, thereby realize widening the purpose of geophone frequency band by 2 seconds.
Geophone is except that working coil a and tickler d among the design, also has calibration coil e, this coil e is connected with supporting digital collection device by demarcating input end f, the digital collection device produces and to be used for demarcation signal (sine wave and pulse) that seismometer is demarcated, encourage the mass motion by calibration coil e, thereby obtain the duty of whole instrument.
The working coil a of geophone, tickler d and calibration coil e collaborative work among the design, the effect of bearing respectively and picking up ground motion information, widen signal frequency domain and calibrating instrument performance.Through the effect of prime amplifier b and compensator-amplifier unit c, the ground motion signal of having been widened, process differential amplifier g delivers to the output terminal of seismometer at last.
Claims (7)
1, a kind of reaction type broadband seismometer, form by a geophone and a cover electronic feedback system, it is characterized in that this geophone is a three-component geophone, vertically be integral the ground device on a chassis, wherein up and down by one to, two horizontal vibration sensors of an East and West direction and a north-south
Vertical constituting to geophone: magnet is connected with instrument stand by screw, be connected and fixed the support of geophone on it by bolt, mass is connected with crossbeam by cross sheet spring, the preceding lower end of mass is a connecting rod, the middle part of connecting rod is the main coil frame, coaxial each one group of working coil and the tickler that twining on it; The middle part of connecting rod is the secondary coil frame, is twining one group of calibration coil on it; Framework upper is provided with the leaf spring, and an end of this leaf spring is fixed on the framework, the crooked backward quality of connection piece of the other end;
Constituting of horizontal vibration sensor: magnet is connected with instrument base by screw, is being connected and fixed the support of geophone on it by bolt, pendular body by cross sheet spring, hang spring and be connected with support with hang spring; The preceding lower end of mass is a connecting rod, is the main coil frame in the bottom of connecting rod, coaxial each one group of working coil and the tickler that twining on it; The connecting rod middle part is the secondary coil frame, is twining one group of calibration coil on it; On the top of connecting rod is mass, and mass hangs by hanging spring, hang spring, and is connected with support by hanging spring;
Wherein electronic feedback system is made up of amplifier, feedback component, corrective network and difference driver etc.
2, reaction type broadband seismometer according to claim 1 is characterized in that, framework is provided with the cycle adjustment screw that changes the geophone Machine cycle.
3, reaction type broadband seismometer according to claim 1 is characterized in that, hangs spring and is provided with the cycle adjustment screw that changes the geophone Machine cycle.
4, reaction type broadband seismometer according to claim 1 is characterized in that, adjust screw and be arranged on pendulum mass front end upper right side the zero point of change geophone initial zero.
5, reaction type broadband seismometer according to claim 1 is characterized in that, is respectively equipped with the lock-screw of locking mass, support and cross sheet spring on support and crossbeam.
6, reaction type according to claim 1 broadband seismometer is characterized in that, the instrument stand bottom is provided with three horizontal adjustment base angles.
7, reaction type according to claim 1 broadband seismometer is characterized in that instrument stand is provided with adjustment level spirit bubble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260790 CN2502283Y (en) | 2001-09-12 | 2001-09-12 | Feedback wide frequency band seisomometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260790 CN2502283Y (en) | 2001-09-12 | 2001-09-12 | Feedback wide frequency band seisomometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2502283Y true CN2502283Y (en) | 2002-07-24 |
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ID=33668871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01260790 Expired - Fee Related CN2502283Y (en) | 2001-09-12 | 2001-09-12 | Feedback wide frequency band seisomometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2502283Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738944A (en) * | 2016-02-04 | 2016-07-06 | 中国地震局地震预测研究所 | Inclinedly suspended seismometer, coordinate transformation circuit thereof and transformation method of coordinate transformation circuit |
| CN107315191A (en) * | 2017-08-21 | 2017-11-03 | 南方科技大学 | Automatic leveling and locking device for seismograph |
| CN114200515A (en) * | 2021-12-15 | 2022-03-18 | 浙江大学 | Device and method for adjusting inherent period of seismic picking system of broadband seismometer |
-
2001
- 2001-09-12 CN CN 01260790 patent/CN2502283Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738944A (en) * | 2016-02-04 | 2016-07-06 | 中国地震局地震预测研究所 | Inclinedly suspended seismometer, coordinate transformation circuit thereof and transformation method of coordinate transformation circuit |
| CN105738944B (en) * | 2016-02-04 | 2017-11-28 | 中国地震局地震预测研究所 | Superconducting tilting suspension seismometer and its coordinate conversion circuit, transform method |
| CN107315191A (en) * | 2017-08-21 | 2017-11-03 | 南方科技大学 | Automatic leveling and locking device for seismograph |
| CN107315191B (en) * | 2017-08-21 | 2023-09-26 | 南方科技大学 | Automatic leveling and locking device for seismograph |
| CN114200515A (en) * | 2021-12-15 | 2022-03-18 | 浙江大学 | Device and method for adjusting inherent period of seismic picking system of broadband seismometer |
| CN114200515B (en) * | 2021-12-15 | 2022-08-23 | 浙江大学 | Device and method for adjusting inherent period of seismic picking system of broadband seismometer |
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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 |