CN106291670A - Passive servo big damping rotation acceleration meter for earthquake - Google Patents
Passive servo big damping rotation acceleration meter for earthquake Download PDFInfo
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- CN106291670A CN106291670A CN201610891554.4A CN201610891554A CN106291670A CN 106291670 A CN106291670 A CN 106291670A CN 201610891554 A CN201610891554 A CN 201610891554A CN 106291670 A CN106291670 A CN 106291670A
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- 238000007789 sealing Methods 0.000 claims description 10
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Classifications
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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
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/105—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by magnetically sensitive devices
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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
- G01V1/01—Measuring or predicting earthquakes
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Abstract
The invention provides a kind of passive servo big damping rotation acceleration meter for earthquake, belong to seismic measuring device field, including base plate, radial quality spring assembly, two pendulum-type passive servo big damping moving-coil transducers and circuit board；Pendulum-type passive servo big damping moving-coil transducer includes rocker, moving coil component and magnetic circuit system；One end of two rockers is symmetrically mounted on the both sides of the quality loop of radial quality spring assembly, and moving coil component is arranged on the other end of rocker, and moving coil component stretches in the magnetic gap of magnetic circuit system；Circuit board includes two passive servo big damping moving-coil transducing circuit, two angular acceleration modulate circuits and combiner circuit；Transducer is connected with transducing circuit input end, and the outfan of transducing circuit electrically connects with the input of angular acceleration modulate circuit, and the outfan of two angular acceleration modulate circuits connects combiner circuit；Combiner circuit is used for eliminating nonrotational component, synthesizes rotative component, the voltage signal that output is directly proportional to earthquake rotation acceleration.
Description
Technical field
The present invention relates to accelerometer field, particularly relate to a kind of passive servo big damping rotation acceleration meter for earthquake.
Background technology
Generally strong-motion earthquake observation uses three-component translatory acceleration meter, actually rigid body complete fortune on one point during earthquake
Dynamic characteristic is six degree of freedom vibrations, i.e. includes three translations and three rotations, and especially Near-field ground motion, rotative component is brighter
Aobvious.
All find at present to rotate the phenomenon destroyed in repeatedly violent earthquake.Numerous studies are it has also been found that at structural seismic response
In, rotative component can produce the biggest shearing and moment of flexure in structural elements, former yet with shortage rotative component record etc.
Cause, many countries all do not consider rotary action in the Aseismic Design of structure.
For solving the problems referred to above, apply for earlier application entitled " a kind of rotation acceleration meter for earthquake ", Application No.
The patent of invention of " CN201320066963.2 ", in this patent of invention, rotation acceleration meter for earthquake includes sealing shell, the end
Plate, seal enclosure is provided with radial quality spring assembly, two groups of symmetrical reverse are installed pendulum-type differential capacitor transducer, two
Group moving-coil type antivibrator and circuit board；
Radial quality spring assembly includes the uniform quality loop of axis, Mass Distribution, internal ring, is positioned at two groups of pendulum-types differential
In the middle of capacitive transducer, being connected with base plate by axis lower end, connected by quality loop and two swing seats, quality loop leads to internal ring
Crossing 2-8 parameter spring leaf identical, that be symmetrically installed to connect, internal ring is fixedly mounted on axis upper end；
Two groups of pendulum-type differential capacitor transducers include outer movable plate electrode, interior movable plate electrode and fixed polar plate respectively, outer movable plate electrode, interior
Movable plate electrode is connected with rocker one end, and the other end of rocker is connected with swing seat；
Two groups of moving-coil type antivibrators include moving-coil, yoke, magnet steel, positioning sleeve and magnetic circuit bonnet, respectively by yoke lower end
Being arranged on magnetic circuit seat by symmetrical reverse, magnetic circuit seat is fixed on base plate, and the front end of yoke is by sleeve pipe and pendulum-type differential capacitor
The fixed polar plate of transducer is connected, and moving-coil upper end is connected with outer movable plate electrode, interior movable plate electrode, rocker respectively, and bottom extend into by justifying
In the magnetic gap that the outside of cylindricality pole shoe and yoke upper inner are formed, circuit board include two capacitance voltage translation circuits, two
Individual modulate circuit, combiner circuit, two damping regulation circuit；
Often the group outer movable plate electrode of pendulum-type differential capacitor transducer, interior movable plate electrode and fixed polar plate respectively with a capacitance voltage
Translation circuit input connects, the input of the output termination modulate circuit of capacitance voltage translation circuit, two modulate circuits
Outfan connects combiner circuit, and combiner circuit is for eliminating translation component, and after rotative component is synthesized, output rotates with earthquake
The voltage signal that acceleration is directly proportional, the often corresponding damping regulation circuit of the moving-coil in group moving-coil type antivibrator, and interconnect mutually
Connect, it is provided that the damping ratio required for accelerometer.
In this technical scheme, utilize capacitance voltage translation circuit, modulate circuit, combiner circuit to eliminate earthquake translation and add
Speed, it is achieved that the measurement of earthquake rotation acceleration, monitoring accuracy is high, good reliability；Applied widely, can be widely used for earthquake
The observation of rotation acceleration and the rotation measuring of civil engineering structure.
But, it is complicated to there is circuit in above-mentioned rotation acceleration meter for earthquake, adjusts the shortcomings such as more difficult, there is no the most both at home and abroad
The product of passive servo big damping rotation acceleration meter for earthquake.
Summary of the invention
It is an object of the invention to provide simply and the measurably shake rotation of a kind of compact conformation, reasonable in design, circuit to add
The rotation acceleration meter for earthquake of speed.
The present invention provides a kind of passive servo big damping rotation acceleration meter for earthquake, including:
Base plate, described base plate is fixed on observation station；
Radial quality spring assembly, described radial quality spring assembly includes the uniform quality of axis, Mass Distribution
Ring, multiple spring leaf and internal ring；The bottom of described axis is connected with base plate, and described internal ring is arranged on the top of axis, described
The spring leaf that quality loop is identical by multiple parameters, be symmetrically installed is connected with internal ring；
Two pendulum-type passive servo big damping moving-coil transducers, described pendulum-type passive servo big damping moving-coil transducer includes
Rocker, moving coil component and magnetic circuit system；One end of two rockers is symmetrically mounted on the both sides of quality loop, and described moving coil component is installed
The other end at rocker；Described magnetic circuit system is provided with magnetic gap, and described moving coil component includes actuating coil, described actuating coil
Stretch in magnetic gap and can move in magnetic gap；
Circuit board, described circuit board includes two passive servo big damping moving-coil transducing circuit, two angular acceleration conditionings
Circuit and combiner circuit；Each pendulum-type passive servo big damping moving-coil transducer respectively with a passive servo big damping moving-coil
Transducing circuit input end connects, the outfan of described passive servo big damping moving-coil transducing circuit and described angular acceleration conditioning electricity
The input electrical connection on road, the outfan of two angular acceleration modulate circuits connects combiner circuit；Described combiner circuit is used for disappearing
Unless rotative component, synthesize rotative component, the voltage signal that output is directly proportional to earthquake rotation acceleration；
Described passive servo big damping moving-coil transducing circuit includes the equivalent internal resistance of actuating coil and big damping regulation electricity
Resistance；One end of described actuating coil is connected by the upper end regulating resistance with big damping after equivalent resistance, described actuating coil
The other end is connected with the lower end of big damping regulation resistance.
Further, described magnetic circuit system includes magnetic circuit seat, yoke and armature；Described magnetic circuit seat is arranged on base plate,
Described yoke lower end is arranged on magnetic circuit seat by symmetrical reverse, and described yoke upper end is provided with installation cavity；Described armature is installed fixing
In installation cavity, inside the outside of described armature and installation cavity, form magnetic gap.
Further, described magnetic circuit system also includes magnet steel, positioning sleeve and magnetic circuit bonnet；Described positioning sleeve is socketed in yoke
Inside ferrum, described yoke rear end is provided with magnetic circuit bonnet, inside positioning sleeve, pole shoe rear end be socketed with magnet steel.
Further, described moving coil component also includes that bobbin, described rocker are provided with bobbin installation position, described coil
Frame is fixed on described bobbin installation position, and described actuating coil is fastened on bobbin.
Further, described moving coil component also includes that self calibration coil, described self calibration coil are fastened at bobbin
On；
Described circuit board also includes with self calibration coil one to one for the self calibration of on-line calibration of earthquake field
Circuit, described self-calibration circuit electrically connects with self calibration coil.
Further, this passive servo big damping rotation acceleration meter for earthquake also includes sealing shell, described sealing shell
Fix with base plate and be connected, described radial quality spring assembly, pendulum-type passive servo big damping moving-coil transducer and circuit board
It is installed in sealing enclosure.
Further, described sealing cover top portion is provided with handle.
Further, described base plate is provided with accessory power outlet, the combiner circuit of described accessory power outlet and circuit board and from
Calibration circuit connects.
Further, described pendulum-type passive servo big damping moving-coil transducer also includes that swing seat, two swing seats are separately fixed at
The both sides of quality loop, and the center of circle that the line of two swing seats is by quality loop；One end of described rocker is fixing with swing seat to be connected, and two
In rocker is generally aligned in the same plane, two magnetic circuit systems lay respectively at the left and right sides of this plane.
Further, described internal ring is connected by fixed screw is fixing with the upper end of axis.
Compared to prior art, the passive servo big damping rotation acceleration meter for earthquake that the present invention provides, have following excellent
Point:
1, compact conformation, reasonable in design, circuit is simple, in an annular seal space in achieve based on radial quality spring
Formula double pendulum passive servo big damping moving-coil transducing；
2, passive servo translation circuit, angular acceleration modulate circuit, combiner circuit is utilized to achieve earthquake rotation acceleration
Measurement, low frequency characteristic is good；
3, applied widely, can be widely used for the observation of earthquake rotation acceleration and the rotation acceleration of civil engineering structure
Measurement.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 provides the three-dimensional structure diagram of passive servo big damping rotation acceleration meter for earthquake for the present invention；
Fig. 2 provides the front view of passive servo big damping rotation acceleration meter for earthquake for the present invention；
Fig. 3 provides the top view of passive servo big damping rotation acceleration meter for earthquake for the present invention；
Fig. 4 provides the electrical schematic of passive servo big damping rotation acceleration meter for earthquake for the present invention；
Fig. 5 provides the mathematical model figure of passive servo big damping rotation acceleration meter for earthquake for the present invention.
Reference:
1-axis；2-quality loop；3-internal ring；
4-spring leaf；5-fixed screw；6-swing seat；
7-rocker；8-magnetic circuit seat；9-magnetic circuit bonnet；
10-yoke；11-leg；12-base plate；
13-moving coil component；14-armature；15-magnet steel；
16-positioning sleeve；17-seals shell；18-handle；
19-circuit board；20-accessory power outlet；
21-passive servo big damping moving-coil transducing circuit；
22-angular speed and angle acceleration modulate circuit；23-combiner circuit；
24-self-calibration circuit；25-supporting sleeve；
26-pendulum-type passive servo big damping moving-coil transducer；27-radial quality spring assembly；
28-magnetic circuit system；29-self calibration device.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Fig. 1 provides the three-dimensional structure diagram of passive servo big damping rotation acceleration meter for earthquake for the present invention；Fig. 2 is the present invention
The front view of passive servo big damping rotation acceleration meter for earthquake is provided；Fig. 3 provides passive servo big damping earthquake for the present invention
The top view of rotation acceleration meter；Fig. 4 provides the electrical equipment principle of passive servo big damping rotation acceleration meter for earthquake for the present invention
Figure；Fig. 5 provides the mathematical model figure of passive servo big damping rotation acceleration meter for earthquake for the present invention.
As Figure 1-5, the present invention provides a kind of passive servo big damping rotation acceleration meter for earthquake, including base plate 12,
27, two pendulum-type passive servo big damping moving-coil transducers 26 of radial quality spring assembly and circuit board 19.
Base plate 12 is fixed on observation station；Base plate 12 is a strip aluminium sheet, and base plate is installed by supporting sleeve 25
There are three legs 11；The magnetic circuit seat 8 installing 1, two symmetrical reverse of axis in the middle part of base plate 12 is arranged on the two ends of base plate 12, seals
Shell 17 is arranged on base plate 12, seals shell 17 and constitutes annular seal space with base plate 12, radial quality spring assembly 27, pendulum-type without
Source servo big damping moving-coil transducer 26 and circuit board 19 are installed in annular seal space, to reduce external interference.
Sealing shell 17 top and be provided with handle 18, convenient installation operates；Seal shell 17 side and be provided with accessory power outlet 20, defeated
Go out socket 20 to be connected with combiner circuit 23 and the self-calibration circuit 24 of circuit board 19.
Radial quality spring assembly 27 hangs in shell 17, and radial quality spring assembly 27 includes axis 1, quality
Quality loop 2, multiple spring leaf 4 and the internal ring 3 being evenly distributed；The bottom of axis 1 is connected with base plate 12, and internal ring 3 is by fixing
Screw 5 is arranged on the top of axis 1, and quality loop 2 is connected with internal ring 3 by 4 parameter spring leafs 4 identical, that be symmetrically installed.
In the present embodiment, the quantity of spring leaf 4 is 4, but, it is only for a specific embodiment of the present invention, this
The quantity of the spring leaf 4 of invention is not limited thereto, it is also possible to for 2-8, and preferably even number.
Pendulum-type passive servo big damping moving-coil transducer 26 includes rocker 7, moving coil component 13 and magnetic circuit system 28；Two pendulum
The parameters of the rocker 7 of formula passive servo big damping moving-coil transducer 26 is identical, and one end of two rockers 7 is symmetrically mounted on quality
The both sides of ring 2, moving coil component 13 is arranged on the other end of rocker 7.
Specifically, the both sides of quality loop 2 fix a swing seat 6 respectively, the line of two swing seats 6 center of circle by quality loop 2；
One end of two rockers 7 is symmetrically mounted on the swing seat 6 of quality loop 2 both sides, in two rockers 7 are generally aligned in the same plane, and two magnetic circuit systems
28 left and right sides laying respectively at this plane.
The moving coil component 13 actuating coil G that to include bobbin identical with being wound on parameter on bobbin1With self calibration coil G2,
The parameters of the bobbin of two pendulum-type passive servo big damping moving-coil transducers 26 is identical.
Magnetic circuit system 28 is provided with magnetic gap, and specifically, magnetic circuit system 28 includes magnetic circuit seat 8, yoke 10 and armature
14；Magnetic circuit seat 8 is arranged on base plate 12, and described yoke 10 lower end is arranged on magnetic circuit seat 8 by symmetrical reverse, on described yoke 10
End is provided with installation cavity；Described armature 14 is fixed in installation cavity, shape inside the outside of cylindrical armature 14 and installation cavity
Become magnetic gap.
Further, magnetic circuit system 28 also includes magnet steel 15, positioning sleeve 16 and magnetic circuit bonnet 9；Described positioning sleeve 16 overlaps
Being connected on yoke 10 internal, described yoke 10 rear end is provided with magnetic circuit bonnet 9, and positioning sleeve 16 internal sleeve is connected to magnet steel 15.
The actuating coil G of moving coil component 131With self calibration coil G2All stretch in this magnetic gap, as actuating coil G1With oneself
Alignment coil G2In magnetic gap during motion, an induction electromotive force can be produced.
Circuit board 19 include two passive servo 21, two angular acceleration modulate circuits 22 of big damping moving-coil transducing circuit,
Combiner circuit 23 and two self-calibration circuits 24.
Specifically, by two groups of actuating coil G1Passive servo big damping moving-coil identical with two parameters the most successively changes
Energy circuit 21, angular speed and angle acceleration modulate circuit 22 are connected, and composition is symmetrical, two pendulum-types of the identical reverse installation of parameter are passive
Servo big damping moving-coil transduction type angular accelerometer.
Often group pendulum-type passive servo big damping moving-coil transducer 26 is electric with a passive servo big damping moving-coil transducing respectively
Road 21 input connects, the input of the output termination angular acceleration modulate circuit 22 of passive servo big damping moving-coil transducing circuit 21
End, the outfan of two angular acceleration modulate circuits 22 is connected to the input of combiner circuit 23, combiner circuit 23 output with for
The output voltage that velocity of rotation is directly proportionalForming rotation acceleration meter for earthquake, rotation acceleration meter for earthquake passes through accessory power outlet
20 can be connected with any recorder (or data acquisition unit), it is thus achieved that earthquake rotation acceleration time-history curves.
Specifically, passive servo big damping moving-coil transducing circuit 21 includes the equivalent internal resistance R of actuating coilSAnd hinder greatly
Buddhist nun regulates resistance R；Actuating coil G1One end by equivalent resistance RSUpper end with big damping regulation resistance R is connected afterwards, active line
Circle G1The other end be connected with the lower end of big damping regulation resistance R.
Two angular speed and angle acceleration modulate circuits 22 are respectively to two groups of passive servo big damping moving-coil transducing circuit 21
Output voltage is nursed one's health, and is simultaneously entered to combiner circuit 23.
Self calibration coil G2Electrically connect with described circuit board 24, self calibration coil G2Self calibration electricity with described circuit board 24
Road constitutes self calibration device 29, and self calibration device 29 provides the calibration of rotation acceleration meter technical parameter, and during earthquake, two parameters are identical
Self calibration coil G2The actuating coil G identical with two parameters1Magnetic gap is synchronized with the movement.
Self-calibration circuit 24 can send sine voltage signal, and self-calibration circuit 24 outputs signal to self calibration coil G2,
For parameters such as the on-line calibration of earthquake field, calibration rotation acceleration meter amplitude-frequency characteristics.
Its operation principle and process be explained in detail below:
Rotation acceleration meter for earthquake ultimate principle can describe with Fig. 1, Fig. 2 and Fig. 4.When carrying out seismological observation, earthquake
Rotation acceleration meter base plate 12 is fixed in observation station, when seismic shock, and earthquake rotation accelerationAct simultaneously on base plate
On, the magnetic circuit system that is connected with base plate 12, axis, shell follow base plate synchronous vibrating, by quality loop 2, rocker 7 and moving-coil simultaneously
The motion parts of assembly 13 composition produces relative rotation relative to axis 1, two the actuating coil G being arranged on two rockers 71
Identical relative motion, two actuating coil G are all produced relative to the magnetic gap of two magnetic circuits1All cut in respective magnetic gap
Cutting the magnetic line of force and produce induction electromotive force, the electromotive force each produced inputs to respective passive servo big damping moving-coil transducing respectively
Circuit 21 and angular acceleration modulate circuit 22, two angular acceleration modulate circuits 22 are simultaneously entered to combiner circuit 23, synthesis electricity
Road 23 exports the voltage signal being directly proportional to earthquake rotation accelerationForm rotation acceleration meter for earthquake.
For radial double pendulum structure, seeing Fig. 5, its differential equation of motion is:
J0For the rotary inertia of pendulum, K0The angular rigidity of spring system, B0It is the damping force coefficient including air damping, G
=Bl LKFor motor constant, LKFor instruction pendulum length, i is the electric current in coil, and y is the flat moving displacement of ground,For ground
Rotation displacement, θ is the angular displacement of pendulum.
Non trivial solution is:
In formula:m1,m2It is respectively the equivalent mass of double pendulum, H1,
H2It is respectively two mass cgs distance to rotary shaft, l0For the reduced pendulum length of double pendulum hammer gyroscopic pendulum, s operator, n0For self-vibration circle
Frequency, D1For damping ratio,
Work as m1H1=m2H2Time, l0=∞, does not reacts translation.
As ω < < n0,D1> > 1 time, the angular displacement (s) of pendulum and the rotation acceleration of groundBeing directly proportional, ω is that ground turns
Dynamic frequency,
When constituting the pendulum-type passive servo big damping moving-coil transducer that two groups of symmetrical reverse are installed, shown in Fig. 4, its electricity
Road equation is
Solve equation (1) and (2), can obtain
In formula
Formula (6) is substituted into formula (5) obtain:
By formula (4) it may be seen that work as ω=n0,D1> > 1, the output voltage of passive servo big damping moving-coil transducing circuit with
Ground rotation acceleration is directly proportional.
Formula (4) is bandpass shape, and damping ratio is the biggest, and bandpass shape is the widest.
From formula (6), R is the least, damping ratio D1The biggest, bandpass shape is the widest, thus reaches to expand low frequency and height
Frequently the purpose of characteristic.
The output voltage of the pendulum-type passive servo big damping moving-coil transducer that symmetrical reverse is installed passes through angular acceleration respectively
It it is the output voltage such as formula of passive servo formula big damping rotation acceleration meter for earthquake after modulate circuit and angular acceleration combiner circuit
(8) shown in:
K in formula1Conditioning coefficient for angular acceleration modulate circuit.
The sensitivity of macroseism passive servo big damping rotary accelerometer is as shown in formula (9):
Compared to prior art, the passive servo big damping rotation acceleration meter for earthquake that the present invention provides, have the advantage that
1, compact conformation, reasonable in design, circuit is simple, in an annular seal space in achieve based on radial quality spring
Formula double pendulum passive servo big damping moving-coil transducing；
2, passive servo translation circuit, angular acceleration modulate circuit, combiner circuit is utilized to achieve earthquake rotation acceleration
Measurement, low frequency characteristic is good；
3, applied widely, can be widely used for the observation of earthquake rotation acceleration and the rotation acceleration of civil engineering structure
Measurement.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a passive servo big damping rotation acceleration meter for earthquake, it is characterised in that including:
Base plate, described base plate is fixed on observation station；
Radial quality spring assembly, described radial quality spring assembly includes the uniform quality loop of axis, Mass Distribution, many
Individual spring leaf and internal ring；The bottom of described axis is connected with base plate, and described internal ring is arranged on the top of axis, described quality loop
Spring leaf identical by multiple parameters, that be symmetrically installed is connected with internal ring；
Two pendulum-type passive servo big damping moving-coil transducers, described pendulum-type passive servo big damping moving-coil transducer includes pendulum
Frame, moving coil component and magnetic circuit system；One end of two rockers is symmetrically mounted on the both sides of quality loop, and described moving coil component is arranged on
The other end of rocker；Described magnetic circuit system is provided with magnetic gap, and described moving coil component includes that actuating coil, described actuating coil are stretched
Enter in magnetic gap and can move in magnetic gap；
Circuit board, described circuit board includes two passive servo big damping moving-coil transducing circuit, two angular acceleration modulate circuits
And combiner circuit；Each pendulum-type passive servo big damping moving-coil transducer respectively with a passive servo big damping moving-coil transducing
Circuit input end connects, the outfan of described passive servo big damping moving-coil transducing circuit and described angular acceleration modulate circuit
Input electrically connects, and the outfan of two angular acceleration modulate circuits connects combiner circuit；Described combiner circuit is used for eliminating non-
Rotative component, synthesizes rotative component, the voltage signal that output is directly proportional to earthquake rotation acceleration；
Described passive servo big damping moving-coil transducing circuit includes the equivalent internal resistance of actuating coil and big damping regulation resistance；Institute
The one end stating actuating coil is connected by the upper end regulating resistance with big damping after equivalent resistance, the other end of described actuating coil
It is connected with the lower end of big damping regulation resistance.
Passive servo the most according to claim 1 big damping rotation acceleration meter for earthquake, it is characterised in that described magnetic circuit system
System includes magnetic circuit seat, yoke and armature；Described magnetic circuit seat is arranged on base plate, and described yoke lower end is arranged on by symmetrical reverse
On magnetic circuit seat, described yoke upper end is provided with installation cavity；Described armature is fixed in installation cavity, the outside of described armature and peace
Magnetic gap is formed inside behaveing affectedly.
Passive servo the most according to claim 2 big damping rotation acceleration meter for earthquake, it is characterised in that described magnetic circuit system
System also includes magnet steel, positioning sleeve and magnetic circuit bonnet；Described positioning sleeve is socketed in inside yoke, and described yoke rear end is provided with magnetic circuit
Bonnet, positioning sleeve internal sleeve is connected to magnet steel.
Passive servo the most according to claim 1 big damping rotation acceleration meter for earthquake, it is characterised in that described moving-coil group
Part also includes that bobbin, described rocker are provided with bobbin installation position, and described bobbin is fixed on described bobbin installation position,
Described actuating coil is fastened on bobbin.
Passive servo the most according to claim 4 big damping rotation acceleration meter for earthquake, it is characterised in that described moving-coil group
Part also includes that self calibration coil, described self calibration coil are fastened on bobbin；
Described circuit board also includes with self calibration coil one to one for the self-calibration circuit of on-line calibration of earthquake field,
Described self-calibration circuit electrically connects with self calibration coil.
Passive servo the most according to claim 1 big damping rotation acceleration meter for earthquake, it is characterised in that this passive servo
Big damping rotation acceleration meter for earthquake also includes sealing shell, and described sealing shell is fixing with base plate to be connected, described radial matter
Amount spring assembly, pendulum-type passive servo big damping moving-coil transducer and circuit board are installed in sealing enclosure.
Passive servo the most according to claim 6 big damping rotation acceleration meter for earthquake, it is characterised in that outside described sealing
Roof portion is provided with handle.
Passive servo the most according to claim 5 big damping rotation acceleration meter for earthquake, it is characterised in that on described base plate
Being provided with accessory power outlet, described accessory power outlet is connected with combiner circuit and the self-calibration circuit of circuit board.
Passive servo the most according to claim 1 big damping rotation acceleration meter for earthquake, it is characterised in that described pendulum-type without
Servo big damping moving-coil transducer in source also includes that swing seat, two swing seats are separately fixed at the both sides of quality loop, and the line of two swing seats
By the center of circle of quality loop；In one end of described rocker is fixing with swing seat to be connected, and two rockers are generally aligned in the same plane, two magnetic circuit systems
System lays respectively at the left and right sides of this plane.
Passive servo the most according to claim 1 big damping rotation acceleration meter for earthquake, it is characterised in that described is interior
Ring is connected by fixed screw is fixing with the upper end of axis.
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| CN201610891554.4A CN106291670B (en) | 2016-10-12 | 2016-10-12 | The big damping rotation acceleration meter for earthquake of passive servo |
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| Publication number | Publication date |
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| CN106291670B (en) | 2018-04-20 |
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