CN106932818B - Seismograph for detecting rotary earthquake motion - Google Patents
Seismograph for detecting rotary earthquake motion Download PDFInfo
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- CN106932818B CN106932818B CN201710323196.1A CN201710323196A CN106932818B CN 106932818 B CN106932818 B CN 106932818B CN 201710323196 A CN201710323196 A CN 201710323196A CN 106932818 B CN106932818 B CN 106932818B
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- pendulum body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The seismograph for detecting the rotary earthquake motion comprises a cylindrical shell, wherein a support ring is arranged in the middle of the inner wall of the shell, a cylindrical pendulum body is vertically arranged in the center of the support ring, spring wires are uniformly connected between the side wall of the pendulum body and the support ring, a cross arm is arranged at the upper part in the shell, the tail end of the cross arm is connected with an annular seat, two rectangular elastic vertical pieces are connected between the bottom of the annular seat and the top of the pendulum body, and strain pieces are pasted on the two elastic vertical pieces. The invention has the beneficial effects that: the earthquake detection device has the advantages of simple structure, low cost and reasonable design, can accurately detect out the rotation earthquake motion, greatly simplifies the existing observation work, is simple and convenient to operate, and improves the observation efficiency.
Description
Technical Field
The present invention relates to a seismometer for detecting rotational seismic motion.
Background
At present, earthquake measurement is a leading-edge measurement field which is related to the property safety of people and the stable development of the state. The seismic measurement technology, the seismograph of the invention of self-tension balance, has been in history for thousands of years, the seismic measurement means are more and more abundant, and the seismic theoretical model is more and more complete. Modern seismology holds that the earth medium motion caused by earthquakes is not a common plane motion, but a complex multidimensional motion which not only comprises three independent translation components, but also comprises three independent rotation components. The prior literature is always dedicated to recording and analyzing the displacement in the horizontal direction, and with the frequent occurrence of earthquakes of recent decades, the seismic data are more and more abundant, wherein a plurality of examples with torsional characteristic structural damage are frequently shown, so that the rotation component in the seismic wave gradually draws attention in the engineering field.
Disclosure of Invention
In order to solve the technical defects, the invention provides the seismograph which is used for detecting the rotary earthquake motion and has accurate detection and strong anti-interference capability.
The invention is realized by the following measures:
the seismograph for detecting rotary earthquake motion comprises a cylindrical and closed seismograph
The casing, shells inner wall middle part is provided with annular support ring of circle, the vertical columniform pendulum body that is provided with in support ring inner center, all be connected through the tractive line between pendulum body top center and the casing top center and between pendulum body bottom center and the casing bottom center, evenly be connected with the spring silk between pendulum body lateral wall and the support ring, upper portion is provided with the xarm in the casing, xarm end-to-end connection has the annular seat, be connected with two rectangular elasticity vertical slices between annular seat bottom and the pendulum body top, all post the foil gage on two elasticity vertical slices to the plane at two elasticity vertical slices places is mutually perpendicular, and the tractive line between pendulum body top center and the casing top center passes the center of annular seat, the foil gage is connected with battery and controller.
The top of the shell is provided with an electrical cabinet, the storage battery and the controller are arranged at the center of the electrical cabinet, the controller is connected with a wireless communication unit, the wireless communication unit is connected with an antenna, and the antenna is arranged at the center of the top of the electrical cabinet.
The middle part of the pendulum body is as high as the support ring, the support ring is uniformly provided with three fixing points, two spring wires are connected between each fixing point and the side wall of the pendulum body, the two spring wires are vertically symmetrical, one spring wire extends obliquely upwards, and the other spring wire extends obliquely downwards.
The invention has the beneficial effects that: the earthquake detection device has the advantages of simple structure, low cost and reasonable design, can accurately detect out the rotation earthquake, greatly simplifies the current detection work, is simple and convenient to operate, and improves the detection efficiency.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
FIG. 2 is a schematic view of a partial cross-sectional structure of the present invention.
Wherein: the device comprises a shell 1, a pendulum body 2, a traction rope 3, a spring wire 4, a support ring 5, a strain gauge 6, an elastic vertical sheet 7, an annular seat 8, a cross arm 9, a storage battery 10, a controller 11, an electrical cabinet 12 and an antenna 13.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 and 2, the seismograph for detecting rotational seismic motion comprises a cylindrical and closed shell 1, wherein a circular support ring 5 is arranged in the middle of the inner wall of the shell 1, a cylindrical pendulum body 2 is vertically arranged in the center of the support ring 5, the top center of the pendulum body 2 and the top center of the shell 1 as well as the bottom center of the pendulum body 2 and the bottom center of the shell 1 are connected through a traction rope 3, spring wires 4 are uniformly connected between the side wall of the pendulum body 2 and the support ring 5, a cross arm 9 is arranged at the upper part in the shell 1, the tail end of the cross arm 9 is connected with an annular seat 8, two rectangular elastic vertical pieces 7 are connected between the bottom of the annular seat 8 and the top of the pendulum body 2, strain pieces 6 are respectively attached to the two elastic vertical pieces 7, the planes where the two elastic vertical pieces 7 are located are perpendicular to each other, the traction rope 3 between the top center of the pendulum body 2 and the top center of the shell 1 penetrates through the center of the annular seat 8, and the strain pieces 6 are connected with a storage battery 10 and a controller 11.
An electrical appliance bin 12 is arranged at the top of the shell 1, the storage battery 10 and the controller 11 are arranged in the center of the electrical appliance bin 12, the controller 11 is connected with a wireless communication unit, the wireless communication unit is connected with an antenna 13, and the antenna 13 is arranged in the center of the top of the electrical appliance bin 12. The middle part of the pendulum body 2 is as high as the support ring 5, the support ring 5 is uniformly provided with three fixing points, two spring wires 4 are connected between each fixing point and the side wall of the pendulum body 2, the two spring wires 4 are vertically symmetrical, one spring wire 4 extends obliquely upwards, and the other spring wire extends obliquely downwards.
The working principle is as follows: rotational seismic motion is a wave that propagates in an infinite medium due to deformation of the medium. When an earthquake occurs, the ground movement comprises translation and rotation, in order to avoid the interference of translation, the rotation of the pendulum body 2 cannot be caused due to the uniform tension of the spring wire 4, but the rotation of the ground can cause the pendulum body 2 to rotate, the pendulum body 2 can distort the elastic vertical sheet 7 when the pendulum body rotates and displaces, so that the strain sheet 6 attached to the elastic vertical sheet 7 generates the changes of resistance and the like, a signal is transmitted to the controller 11, the controller 11 calculates the torque according to the changes of the resistance and the like, and deduces the rotation angle of the pendulum body 2, thereby further deducing the magnitude of the rotation earthquake motion. Adopt two plane vertically flexure strips that locate can detect the torsion on two dimensions simultaneously, detect more comprehensively, get the average value between them moreover, make the testing result more accurate. And the calculated result is sent to a background through the wireless communication unit and the antenna for real-time detection.
Since the pendulum body 2 is pulled up and down by the pulling rope 3, the motion equation of the pendulum body 2 is determined by the moment of inertia of the pendulum body 2 and the restoring moment and the damping moment of the spring wire 4. The equation of motion for pendulum 2 is therefore:
(ii) a In the formula (I), the compound is shown in the specification,θfor the rotation angle of the pendulum body 2 relative to the housing 1,Jis the moment of inertia of the pendulum mass 2,Bin order to be a damping coefficient of the damping,Cin order to recover the moment coefficient, the form of the moment coefficient is the same as the motion equation of a displacement horizontal pendulum, only the term of gravity recovery moment is reduced, and the moment coefficient can record not only horizontal displacement but also rotation around a vertical axis but also only a rotating part unlike the horizontal pendulum.
The foregoing is only a preferred embodiment of this patent, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of this patent, and these modifications and substitutions should also be regarded as the protection scope of this patent.
Claims (1)
1. A seismometer for detecting rotational seismic motion, comprising: the device comprises a cylindrical and closed shell, wherein an annular support ring is arranged in the middle of the inner wall of the shell, a cylindrical pendulum body is vertically arranged in the center of the support ring, the top center of the pendulum body and the top center of the shell as well as the bottom center of the pendulum body and the bottom center of the shell are connected through traction ropes, spring wires are uniformly connected between the side wall of the pendulum body and the support ring, a cross arm is arranged at the upper part in the shell, an annular seat is connected to the tail end of the cross arm, two rectangular elastic vertical sheets are connected between the bottom of the annular seat and the top of the pendulum body, strain gauges are attached to the two elastic vertical sheets, the planes of the two elastic vertical sheets are mutually vertical, the traction rope between the top center of the pendulum body and the top center of the shell penetrates through the center of the annular seat, the strain gauges are connected with a storage battery and a controller, the middle of the pendulum body and the height of the support ring are the same, three fixing points are uniformly arranged on the support ring, two spring wires are connected between each fixing point and the side wall of the pendulum body, the two spring wires are symmetrical up and down, one spring wire extends obliquely, and the other spring wire extends downwards; the improved electric appliance cabinet is characterized in that an electric appliance cabinet is arranged at the top of the shell, the storage battery and the controller are arranged at the center of the electric appliance cabinet, the controller is connected with a wireless communication unit, the wireless communication unit is connected with an antenna, and the antenna is arranged at the center of the top of the electric appliance cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323196.1A CN106932818B (en) | 2017-05-09 | 2017-05-09 | Seismograph for detecting rotary earthquake motion |
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| CN201710323196.1A CN106932818B (en) | 2017-05-09 | 2017-05-09 | Seismograph for detecting rotary earthquake motion |
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| Publication Number | Publication Date |
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| CN106932818A CN106932818A (en) | 2017-07-07 |
| CN106932818B true CN106932818B (en) | 2023-02-17 |
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| CN201710323196.1A Active CN106932818B (en) | 2017-05-09 | 2017-05-09 | Seismograph for detecting rotary earthquake motion |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919343B (en) * | 2018-05-16 | 2021-09-07 | 黑龙江省敏动传感科技有限公司 | Rotary seismometer |
| CN108873057B (en) * | 2018-07-09 | 2020-12-11 | 嘉兴市祥发织造股份有限公司 | Seismometer |
| CN109884690B (en) * | 2019-03-12 | 2020-07-17 | 夏仕安 | Monitoring device for detecting earthquake motion rotation component |
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