CN208224507U - A kind of composite vibrating sensor - Google Patents
A kind of composite vibrating sensor Download PDFInfo
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- CN208224507U CN208224507U CN201820721026.9U CN201820721026U CN208224507U CN 208224507 U CN208224507 U CN 208224507U CN 201820721026 U CN201820721026 U CN 201820721026U CN 208224507 U CN208224507 U CN 208224507U
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Abstract
The utility model relates to a kind of composite vibrating sensors, including outer housing, in the center setting magnetic circuit system of outer housing, closed annular gap is constituted between the magnetic circuit system and outer housing and generates gap magnetic field in the annular gap, coil vibrating body is set in the annular gap, coil vibrating body is by spring-strip suspension outside magnetic circuit system, piezoelectric vibrator is provided between coil vibrating body and magnetic circuit system, the coil vibrating body can be vibrated up and down and be resetted relative to magnetic circuit system under conditions of extraneous vibration, the coil vibrating body makes coil vibrating body cut the gap magnetic field generation electrical signal of reaction relative to the up-down vibration of magnetic circuit system, the piezoelectric vibrator deformation is set to generate oscillator deformation electric signal simultaneously, the electrical signal of reaction passes through the external connecting terminal output of coil vibrating body, the oscillator deformation electric signal passes through The external connecting terminal output of piezoelectric vibrator.The utility model couples piezoelectric effect and galvanomagnetic-effect, the detection for vibration signal.
Description
Technical field
The utility model relates to vibrating sensor technical fields, and in particular to a kind of composite vibrating sensor, this is practical
It is novel to can be applied to various vibration detections, such as seismic prospecting, vibration equipment monitoring, earthquake detection etc..
Background technique
Currently, world's seismic survey forward direction high-resolution develop, it is desirable that geophone to high-precision, broadband, low mistake
True direction development, i.e. Super Geophone.It has broader dynamic range compared with common wave detector, and the smaller distortion factor resists
Electromagnetic interference and high-precision parameter consistency etc..
In the prior art, the vibrating sensor based on galvanomagnetic-effect principle is an important branch of seismic prospecting research.
But there is distorted signals in it, the reason is as follows that, when coil passes through magnetic flux density, if the linearity of magnetic flux density is not
It is good, then the linearity of generated induced electromotive force can also change, voltage caused by geophone can be made in this way
Signal cannot with high fidelity reflect the actual conditions of seismic wave, affect to seismic prospecting quality.Meanwhile it being used in exploration
In, due to the hysteresis of spring-mass oscillator in vibration, so that the frequency band respective width of conventional wave detector is relatively narrow, signal
Fidelity is poor, through less adapting to high-resolution seismic survey.The consistent sex differernce of geophone parameter, is mainly manifested in
In sensitivity, makes to interfere between string of the received signal between wave detector, received seismic signal is also made to generate certain distortion.
Summary of the invention
The main purpose of the utility model is to provide a kind of composite vibrating sensor, solves vibration in the prior art and passes
The technical problem that the monitoring sensitivity of sensor is not high, monitoring result is inaccurate.
The technical solution of the utility model are as follows:
A kind of composite vibrating sensor, including outer housing, in the center setting magnetic circuit system of outer housing, the magnetic circuit system
Closed annular gap is constituted between system and outer housing and generates gap magnetic field in the annular gap, is set in the annular gap
Coil vibrating body is set, coil vibrating body outside magnetic circuit system, is set by spring-strip suspension between coil vibrating body and magnetic circuit system
It is equipped with piezoelectric vibrator, the coil vibrating body can be vibrated up and down and be resetted relative to magnetic circuit system under conditions of extraneous vibration,
The coil vibrating body makes coil vibrating body cut the gap magnetic field generation induced electricity relative to the up-down vibration of magnetic circuit system
Signal, while the piezoelectric vibrator deformation being made to generate oscillator deformation electric signal, the electrical signal of reaction passes through outside coil vibrating body
Connecting terminal output is connect, the oscillator deformation electric signal passes through the external connecting terminal output of piezoelectric vibrator.
Further, the outer housing includes side wall and the upper end cover and lower cover that side wall upper and lower end is arranged in；The magnetic
Road system includes permanent magnet, two groups of yokes and two groups of positioning columns, and two groups of yokes fix the two poles of the earth for being set in permanent magnet respectively,
The positioning column that two groups of yokes pass through respectively on the outside of them is fixedly connected with upper end cover and lower cover.
Further, the coil vibrating body includes bobbin, the upper and lower part wound around coil of the bobbin, coil
Two ends be each passed through the positioning column of their sides and the connecting terminal be set.
Further, the piezoelectric vibrator includes substrate and piezoelectric material, and piezoelectric material is bonded in substrate outer end face, substrate
The annulus laminated structure being integrally formed with piezoelectric material, substrate are set on positioning column by the through-hole fixation in its center, substrate
Edge be fastened in the first inner card cage of bobbin inner wall, the piezoelectric material connecting wire of piezoelectric vibrator described in two groups is worn respectively
Cross upper end cover and the external connecting terminal of lower cover.
Further, the spring leaf is annulus laminated structure, and spring leaf described in two groups passes through the through-hole in their centers
Fixation is set on two groups of positioning columns, and the edge of spring leaf is fastened in the second inner card cage of bobbin inner wall.
Further, sealing ring is provided between the side wall and upper end cover and lower cover of the outer housing.
Further, the substrate is made of conductive material, and the piezoelectric material is piezoelectric ceramics or piezopolymer.
The utility model has the beneficial effects that
1. utility model device is by piezoelectric vibrator system and spring --- quality vibrational system is combined together, by piezoelectricity
Effect and both coupling principles of electromagnetic induction combine the detection for vibration signal, and two kinds of effects is made to be in once per revolution vibration, benefit
With piezoelectric signal bandwidth, the small feature of distorted signals plays compensating action to high-frequency signal, using electromagnetic induction to Low Medium Frequency
The high effect of signal gain, improves the sensitivity of vibration detection, avoids the frequency difference between signal, at the later period of signal
Reason.
2. utility model device utilizes electromagnetic induction effect, inductive loop is generated in bobbin, to generate damping
Power, it is ensured that vibrational system has suitable damping effect, i.e. electromagnetic damping；This damping action can guarantee piezoelectric vibrator
Front and back signal between interference it is few, help to improve the resolution of signal.
3. the inductance of the bobbin of utility model device can provide impedance for piezoelectric signal, improves piezoelectric effect and generate
DC response difference feature, compensating action can be played to electromagnetic induction signal, propose the sensitivity of entire sensor
It rises.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of piezoelectric vibrator；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the structural schematic diagram of magnetic circuit system；
Fig. 5 is the structural schematic diagram of bobbin.
In figure, 1- outer housing, 2- magnetic circuit system, 3- coil vibrating body, 4- spring leaf, 5- piezoelectric vibrator, 6- connecting terminal,
7- side wall, 8- upper end cover, 9- lower cover, 10- permanent magnet, 11- yoke, 12- positioning column, 13- bobbin, 14- coil, 15- base
Plate, 16- piezoelectric material, 17- sealing ring, 18- support sleeve, 19- circlip.
Specific embodiment
The utility model is described in further detail below by specific embodiment combination attached drawing.It is wherein different to implement
Similar component uses associated similar element numbers in mode.In the following embodiments, many datail descriptions are
In order to enable the application can be better understood.However, those skilled in the art can recognize without lifting an eyebrow, it is part of
Feature is dispensed in varied situations, or can be substituted by other elements, material, method.In some cases,
The relevant some operations of the application are there is no display in the description or describe, this is the core in order to avoid the application
It is flooded by excessive description, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary,
They can completely understand relevant operation according to the general technology knowledge of description and this field in specification.
The basic principle of the utility model is to couple piezoelectric effect and galvanomagnetic-effect, the inspection for vibration signal
It surveys.Vibration damping is provided using electromagnetic eddy effect, vibrates piezoelectric vibration and coil under same vibration frequency.Piezoelectricity effect
It should be respectively equipped with independent terminal output with electromagnetic induction, matching treatment is carried out to signal so as to subsequent.
Embodiment:
Referring to a kind of Fig. 1-composite vibrating sensor shown in fig. 5, including outer housing 1, in the center setting of outer housing 1
Magnetic circuit system 2 constitutes closed annular gap and generates gap in the annular gap between the magnetic circuit system 2 and outer housing 1
Coil vibrating body 3 is arranged in magnetic field in annular gap, and coil vibrating body 3 is suspended on outside magnetic circuit system 2 by spring leaf 4, coil
Piezoelectric vibrator 5 is provided between vibrating body 3 and magnetic circuit system 2, coil vibrating body 3 can be relative to magnetic under conditions of extraneous vibration
Road system 2 is vibrated up and down and is resetted, and coil vibrating body 3 makes coil vibrating body 3 cut institute relative to the up-down vibration of magnetic circuit system 2
It states gap magnetic field and generates electrical signal of reaction, while the deformation of piezoelectric vibrator 5 being made to generate oscillator deformation electric signal, electrical signal of reaction
It is exported by the external connecting terminal 6 of coil vibrating body 3, it is defeated by the external connecting terminal 6 of piezoelectric vibrator 5 that oscillator deforms electric signal
Out.
Outer housing 1 includes side wall 7 and upper end cover 8 and lower cover 9 that 7 upper and lower end of side wall is arranged in, side wall 7 and upper end cover 8
It is provided with sealing ring 17 between lower cover 9, significantly reduces leakage field, improves anti-interference ability；Magnetic circuit system 2 includes
10, two groups of yokes 11 of permanent magnet and two groups of positioning columns 12, two groups of yokes 11 fix the two poles of the earth for being set in permanent magnet 10 respectively, in this way
It issues the magnetic line of force from one end of permanent magnet 10 and constitutes circuit to the other end by yoke and shell, thus in yoke 11 and outside
Gap magnetic field is formed between shell 1, two groups of yokes 11 pass through the positioning column 12 and upper end cover 8 and lower cover 9 on the outside of them respectively
It is fixedly connected.
Coil vibrating body 3 includes bobbin 13, and bobbin 13 is metal material, and the upper and lower part of bobbin 13 winds line
Circle 14, two ends of coil 14 are each passed through the positioning column 12 of their sides and connecting terminal 6 are arranged, bobbin 13 and upper end
Enough gaps are must assure that between lid 8 and lower cover 9, to guarantee that coil vibrating body 3 can sufficiently vibrate.
Piezoelectric vibrator 5 includes substrate 15 and piezoelectric material 16, and substrate 15 is made of conductive material, the piezoelectric material 16
For piezoelectric ceramics or piezopolymer；Piezoelectric material 16 is bonded in 15 outer end face of substrate, and substrate 15 and piezoelectric material 16 constitute one
The annulus laminated structure of body, substrate 15 is set on positioning column 12 by the through-hole fixation in its center, in the present embodiment, positioning column
12 in the part for being arranged substrate 15 be frustum cone structure, after 15 sets of substrate on positioning column 12, by support sleeve 18 and upper end cover 8 or
Lower cover 9 offsets, and the edge of substrate 15 is fastened in the first inner card cage of 13 inner wall of bobbin, the first inner card cage and substrate 15 it
Between be provided with circlip 19, the piezoelectric material connecting wire of piezoelectric vibrator 5 described in two groups is each passed through outside upper end cover 8 and lower cover 9
Connect the connecting terminal 6.
Spring leaf 4 is annulus laminated structure, and spring leaf 4 described in two groups is set in two by the through-hole fixation in their centers
On group positioning column 12, the edge of spring leaf 4 is fastened in the second inner card cage of 13 inner wall of bobbin, the second inner card cage and spring leaf
Circlip 19 is provided between 4.
In other embodiments, permanent magnet 10 is provided with magnetic temperature compensating alloy above and below, can compensate by temperature change and
The variation for causing magnetic field, the gap magnetic field field strength for generating annular gap are stablized；Meanwhile magnetic conduction sleeve can be set, it homogenizes
Due to the brought permanent magnet 10 performance unevenness situation everywhere that magnetizes.To keep the voltage signal generated in coil 14 low
The case where distortion ground reflection vibration wave.
The course of work of the utility model is summarized as follows below:
Spring-the quality system being made of spring leaf 4, coil 14 and bobbin 13, the system are placed in by magnetic circuit system 2
In annular gap between outer housing 1, when substrate motion, the utility model sensor moves therewith, the bullet in sensor
Spring-quality system moves in magnetic field relative to magnetic circuit system 2.Corresponding induced electromotive force is generated in coil windings,
Electric signal is drawn by connecting terminal 6, while having incuded eddy current in bobbin 13, this eddy current generates one and the direction of motion
Opposite damping force, i.e. electromagnetic damping make spring-quality system do damped motion.Piezoelectric material is produced in vibration stress rear surface
Raw charge, this charge just become the voltage for being proportional to suffered external force after charge amplifier and measuring circuit amplification and transforming impedance
Output.
According to Faraday's electromagnetic induction law, wire coil length is L transports perpendicular to magnetic flux density B, and perpendicular to speed v
It is dynamic, a voltage value is generated at the both ends of coil, can be calculated as follows:
Voltage value is proportional to coil caused by seismic energy for the relative velocity of magnet, it can be assumed that magnetic flux density is basic
Upper is a constant, can complete the voltage signal that a circuit carrys out the generation of monitoring vibration sensor, this signal is generated to detect
The position of the subsurface formations of reflected seismic energy can be predicted in the characteristic of vibrational structure in seismic prospecting.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are practical new by reading this
Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model
Cover.
Claims (7)
1. a kind of composite vibrating sensor, it is characterised in that: including outer housing (1), in the center setting magnetic circuit of outer housing (1)
System (2) constitutes closed annular gap and between the annular gap generates between the magnetic circuit system (2) and outer housing (1)
Coil vibrating body (3) are arranged in the annular gap in gap magnetic field, and coil vibrating body (3) is suspended on magnetic circuit by spring leaf (4)
System (2) outside, is provided with piezoelectric vibrator (5) between coil vibrating body (3) and magnetic circuit system (2), and the coil vibrating body (3) exists
It can vibrate up and down and reset relative to magnetic circuit system (2) under conditions of extraneous vibration, the coil vibrating body (3) is relative to magnetic circuit
The up-down vibration of system (2) makes coil vibrating body (3) to cut the gap magnetic field generation electrical signal of reaction, while making the piezoelectricity
Oscillator (5) deformation generates oscillator and deforms electric signal, and the electrical signal of reaction passes through coil vibrating body (3) external connecting terminal (6)
Output, the oscillator deformation electric signal are exported by piezoelectric vibrator (5) external connecting terminal (6).
2. composite vibrating sensor according to claim 1, it is characterised in that: the outer housing (1) include side wall (7) and
Upper end cover (8) and lower cover (9) in side wall (7) upper and lower end is set；The magnetic circuit system (2) includes permanent magnet (10), two groups
Yoke (11) and two groups of positioning columns (12), two groups of yokes (11) fixed the two poles of the earth for being set in permanent magnet (10) respectively, two groups
Yoke (11) is fixedly connected by the positioning column (12) on the outside of them with upper end cover (8) and lower cover (9) respectively.
3. composite vibrating sensor according to claim 2, it is characterised in that: the coil vibrating body (3) includes coil
Two ends of frame (13), the upper and lower part wound around coil (14) of the bobbin (13), coil (14) are each passed through them
Simultaneously the connecting terminal (6) are arranged in the positioning column (12) of side.
4. composite vibrating sensor according to claim 3, it is characterised in that: the piezoelectric vibrator (5) includes substrate
(15) and piezoelectric material (16), piezoelectric material (16) are bonded in substrate (15) outer end face, substrate (15) and piezoelectric material (16) structure
Integral annulus laminated structure, substrate (15) are set on positioning column (12) by the through-hole fixation in its center, substrate (15)
Edge be fastened in the first inner card cage of bobbin (13) inner wall, the connection of the piezoelectric material of piezoelectric vibrator described in two groups (5) is led
Line is each passed through upper end cover (8) and the external connecting terminal (6) of lower cover (9).
5. composite vibrating sensor according to claim 4, it is characterised in that: the spring leaf (4) is annulus sheet knot
Structure, spring leaf described in two groups (4) are set on two groups of positioning columns (12) by the through-hole fixation in their centers, spring leaf (4)
Edge be fastened in the second inner card cage of bobbin (13) inner wall.
6. composite vibrating sensor according to claim 5, it is characterised in that: the side wall (7) of the outer housing (1) with it is upper
Sealing ring (17) are provided between end cap (8) and lower cover (9).
7. composite vibrating sensor according to claim 6, it is characterised in that: the substrate (15) uses conductive material system
At the piezoelectric material (16) is piezoelectric ceramics or piezopolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820721026.9U CN208224507U (en) | 2018-05-15 | 2018-05-15 | A kind of composite vibrating sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820721026.9U CN208224507U (en) | 2018-05-15 | 2018-05-15 | A kind of composite vibrating sensor |
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| Publication Number | Publication Date |
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| CN208224507U true CN208224507U (en) | 2018-12-11 |
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| CN201820721026.9U Active CN208224507U (en) | 2018-05-15 | 2018-05-15 | A kind of composite vibrating sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068390A (en) * | 2018-05-15 | 2019-07-30 | 西安工业大学 | Piezoelectricity and electromagnetic coupling vibrating sensor |
| CN110454145A (en) * | 2019-07-12 | 2019-11-15 | 中国地质大学（武汉） | Geological drilling bottom hole multi frequency sensor based on friction nanometer power generator |
-
2018
- 2018-05-15 CN CN201820721026.9U patent/CN208224507U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068390A (en) * | 2018-05-15 | 2019-07-30 | 西安工业大学 | Piezoelectricity and electromagnetic coupling vibrating sensor |
| CN110068390B (en) * | 2018-05-15 | 2024-03-01 | 西安工业大学 | Piezoelectric and electromagnetic coupling vibration sensor |
| CN110454145A (en) * | 2019-07-12 | 2019-11-15 | 中国地质大学（武汉） | Geological drilling bottom hole multi frequency sensor based on friction nanometer power generator |
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