CN109632079A - A kind of metallic shield lead cover, piezoelectric transducer and lead method - Google Patents
A kind of metallic shield lead cover, piezoelectric transducer and lead method Download PDFInfo
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- CN109632079A CN109632079A CN201811491762.0A CN201811491762A CN109632079A CN 109632079 A CN109632079 A CN 109632079A CN 201811491762 A CN201811491762 A CN 201811491762A CN 109632079 A CN109632079 A CN 109632079A
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- metallic shield
- lead cover
- shield lead
- piezoelectric element
- cover
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- 238000010276 construction Methods 0.000 claims abstract description 50
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- 229910052751 metal Inorganic materials 0.000 claims description 22
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 19
- 238000013016 damping Methods 0.000 claims description 12
- 238000009966 trimming Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- 238000005538 encapsulation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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- 238000007747 plating Methods 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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- General Physics & Mathematics (AREA)
- Transducers For Ultrasonic Waves (AREA)
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Abstract
The present invention provides a kind of metallic shield lead cover, piezoelectric transducer and lead method, the piezoelectric element of the interior of shell of piezoelectric transducer can be closed, wiring construction is set on the metallic shield lead cover, the conducting wire of the piezoelectric element of the piezoelectric transducer is fixed by the wiring construction, the clamped stability of the electromagnetic interference capability and lead to improve piezoelectric transducer.
Description
Technical field
The present invention relates to sensor technical fields, and in particular to a kind of metallic shield lead cover, piezoelectric transducer and lead
Method.
Background technique
In recent years, piezoelectric vibration pickup, including charge output type or voltage output type, novel or newly grinding airborne
Application field is quickly promoted and applied, common airborne piezoelectric transducer such as central compressed structure or annular shearing
Formula is that sealing and electromagnetic shielding are realized in the welding encapsulation of monometallic shell.Some piezoelectric vibration sensors products made in U.S.A of early stage
There is double-layer shell structure, but be limited only to structural mechanics effect, fails to play double layer screen Anti-Jamming.And piezoelectric vibration passes
Sensor, especially high temperature or high stability piezoelectric vibration sensors product, charge signal is fainter, generally 10~
20PC/G is horizontal.
Assembly method such as Fig. 1 a of the piezoelectric vibration sensors of traditional structure, internal piezoelectric element and shell) and 1b) institute
Show, no matter whether there is or not internal circuit board, the encapsulation of internal piezoelectric element and shell is separate housing closed shield structure.Have built-in
Circuit board, as shown in Fig. 1 a), lead is all subsequent industrial on the market then by the hanging structure of circuit board fly line to connector
The piezoelectric vibration sensors product of grade reduces fly line length based on the outlet of top.Without internal circuit board, such as Fig. 1 b) institute
Show, piezoelectric vibration sensors product, then directly from piezoelectric element fly line to connector.Other than introducing fly line pendulous tank, draw
The space of line is clamped and Path selection, the circuit of introducing are interfered, clamped structural stability, or even vibration values surge can be introduced etc.
Failure or interference.
Summary of the invention
Therefore, in order to overcome the disadvantages of the above prior art, the present invention provides a kind of metallic shield lead cover, piezoelectric sensing
Device and lead method, the clamped stability of electromagnetic interference capability and lead to improve piezoelectric transducer.
To achieve the goals above, a kind of metallic shield lead cover is provided, it can be to the interior of shell of piezoelectric transducer
Piezoelectric element is closed, and wiring construction is arranged on the metallic shield lead cover, the piezoelectric element of the piezoelectric transducer
Conducting wire is fixed by the wiring construction.
Preferably, the wiring construction is detachably arranged on the metallic shield lead cover.
Preferably, the wiring construction includes main body, and the main body includes mounting portion and wire connecting portion；The mounting body,
Can with the metallic shield lead cover on mounting structure cooperate, the wiring construction is mounted on the metallic shield
On lead cover；The wire connecting portion is capable of fixing the conducting wire of the piezoelectric element of the piezoelectric transducer.
Preferably, the mounting portion includes the convex for being provided with intermediate throughholes, the installation on the metallic shield lead cover
Structure includes that the mounting structure on the metallic shield lead cover includes first through hole, and the first through hole is connected to the metal screen
Cover the inside and outside of lead cover；By the way that the intermediate throughholes convex to be inserted into the first through hole, by the wiring knot
Structure is mounted on the metallic shield lead cover.
Preferably, at least one of two apertures of the intermediate throughholes are set as chamfering structure.
Preferably, the wire connecting portion includes no convex plane；For fixing the piezoelectric sensing in the no convex plane
The conducting wire of the piezoelectric element of device；The intermediate throughholes run through the no convex plane.
Preferably, when the wiring construction is mounted on the metallic shield lead cover, the center line of the first through hole
It is overlapped with the center line of the intermediate throughholes.
Preferably, the mounting portion is Ceramic manufacturing part, and the no convex plane includes metal covering.
Preferably, it is connected between the metallic shield lead cover side wall and top surface by hollows, the mounting base setting
On the hollows.
Preferably, the metallic shield lead cover is semiclosed cylinder copper cover structure.
The present invention also proposes a kind of piezoelectric transducer, including shell, piezoelectric element and pedestal, the piezoelectric element with it is described
Pedestal connection, and it is located in the shell portion, including the above-mentioned metallic shield lead cover stated, the bottom of the metallic shield lead cover
Portion's opening is connect with the pedestal, and to close the piezoelectric element of the piezoelectric transducer, the shell is located at the metallic shield
The outside of lead cover, the shell and the metallic shield lead cover constitute the double-deck electromagnetic shielding.
Preferably, it is connected between the metallic shield lead cover and the shell by shock-damping structure.
Preferably, the shell includes end cap, is connected between metallic shield lead cover and the end cap by shock-damping structure
It connects.
Preferably, the piezoelectric element draws two-way outlet and passes through the extraction of metallic shield lead cover respectively, wherein all the way through interior
Circuits fly line is connected to accessory power outlet to metallic shield lead cover wiring construction, then by wiring construction switching lead；Another way is logical
The pedestal for crossing piezoelectric element is connected with metallic shield lead cover, is connected to accessory power outlet by metallic shield lead cover lead.
Preferably, the piezoelectric transducer, which is characterized in that the piezoelectric element be annular shearing class piezoelectric element or in
The heart compresses piezoelectric element.
The present invention also proposes a kind of lead method of above-mentioned piezoelectric transducer, comprising the following steps:
1) by piezoelectric element conducting wire inside metallic shield lead cover by wiring construction extraction, while by the piezoelectric sensing
The socket of device is burn-on the first conducting wire and the second conducting wire, respectively the insulating sleeve on the first conducting wire and the second wire sleeve, by the pressure
The socket assembly of electric transducer is on the housing；
2) by after metallic shield lead cover and pedestal tight fit assembly, apply epoxy resin in junction and solidify,
The piezoelectric element conducting wire is trimmed again and is welded and fixed with wiring construction after length,
3) it will be welded and fixed after the first conducting wire trimming length with wiring construction, form the electrical signal paths of insulation against ground；
4) it will be welded and fixed after the second conducting wire trimming length with metallic shield lead cover outer wall, be used to form earth-return signal
Channel；
5) welded seal after the end cap lining damping cushion rubber of piezoelectric transducer is formed into shell, with the metallic shield lead
The double-deck electromagnetic armouring structure that can transmit single channel signal is collectively formed in cover.
Preferably, the step 4) further comprises: the welding filler metal on the metallic shield lead cover outer wall, by second
Conducting wire trimming length after be welded and fixed at the welding filler metal on metallic shield lead cover outer wall.
Compared with prior art, inventive sensor forms the double-layer shielding structure of shielding case and shell, and it is dry to improve electromagnetism
Ability is disturbed, the clamped stability of lead reduces wire length, improves the operability of wiring layout's assembly.And it is easy to process, at
This is low, is advantageously implemented mass production.
Detailed description of the invention
Fig. 1 a) it is a kind of schematic device of piezoelectric transducer in the prior art.
Fig. 1 b) be another piezoelectric transducer in the prior art schematic device.
Fig. 2 a) -2c) be metallic shield lead cover of the invention schematic diagram.
Fig. 3 is wiring construction schematic diagram in metallic shield lead cover of the invention.
Fig. 4 is the schematic cross-section of wiring construction in metallic shield lead cover of the invention.
Fig. 5 a) -5c) be metallic shield lead cover of the invention wiring schematic diagram；
Fig. 5 d) be Fig. 5 b) partial enlarged view.
Fig. 6 is the metallic shield lead cover assembling structure schematic cross-section of piezoelectric transducer of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
In one embodiment of the invention, such as Fig. 2 a) -2c) and Fig. 3, Fig. 4 shown in, a kind of metallic shield lead cover 1,
Can the piezoelectric element 11 inside the shell 10 to piezoelectric transducer close, be arranged on the metallic shield lead cover 1 and connect
The conducting wire of cable architecture 2, the piezoelectric element 11 of the piezoelectric transducer is fixed by the wiring construction 2.The metal screen
Cover lead cover 1 and be set as roughly circular, such as Fig. 2 a) -2c) shown in.It in a further embodiment, can be rectangular or other shapes
Shape is configured according to the needs of various forms of piezoelectric transducers.
The invention proposes a kind of novel structures, are on the one hand capable of forming the double layer screen knot of shielding case Yu shell 10
Structure improves electromagnetic interference capability, and the metallic shield cover structure and 11 pedestal 12 of piezoelectric element are implemented in combination with all-metal closed structure,
And realize the double-deck electro-magnetic screen function jointly with shell 10, ambient noise is effectively reduced, the signal quality of product is improved；Separately
On the one hand, overcome the stability of conventional piezoelectric sensor fly line lead poor, the clamped stability of lead reduces wire length, leads
Line is fixed by metallic shield wiring construction, improves the aseismic reliability of wire structures, is shortened the hanging distance of fly line, is mentioned
The operability of high wiring layout's assembly.
Metallic shield lead cover 1 is described in detail below.
In one embodiment, the wiring construction 2 is detachably arranged on the metallic shield lead cover 1.So just
In replacement wiring construction 2, structure without influencing separate terminal enclosure or piezoelectric transducer shell itself improves interchangeability and reliable
Property.Another benefit that wiring construction 2 is arranged is can to reduce and produce easily by 15 Position Design of socket as close as possible to pedestal 12
Product center of gravity improves structural stability when vibration measurement, in turn avoids the inoperable of the too low caused conducting wire welding of socket 15
Property.
Such as Fig. 2 a) -2c) wiring construction 2 includes main body, and the main body includes mounting portion 3 and wire connecting portion 4；The peace
Fill main body, can institute with the metallic shield lead cover 1 on mounting structure cooperation, the wiring construction 2 is mounted on institute
It states on metallic shield lead cover 1；The wire connecting portion 4 is capable of fixing the conducting wire of the piezoelectric element 11 of the piezoelectric transducer.Cause
This, by the structure of reasonable Arrangement, the wiring construction 2 is installed and is taken on the metallic shield separate terminal enclosure in which can be convenient
Under, it is convenient for patching operations and part replacement.
As shown in Fig. 2 a) to Fig. 5, the mounting portion 3 includes the convex for being provided with intermediate throughholes 5, and the metallic shield is drawn
Mounting structure on irdome 1 includes first through hole 6, and the first through hole 6 is connected to the inside of the metallic shield lead cover 1 and outer
Portion；By the way that 5 convex of intermediate throughholes to be inserted into the first through hole 6, the wiring construction 2 is mounted on the metal
On shielded lead cover 1.
In another embodiment, the mounting structure on the metallic shield lead cover 1 further includes and the wiring knot
The matched deep gouge 7 of the body shape of structure 2, the first through hole 6 are opened in the deep gouge 7, in this way, when wiring construction 2 is placed in
When on metallic shield separate terminal enclosure, preferably it can be positioned and be fixed, wiring construction 2 caused by vibrating is avoided to fall off and revolve
Turn.
In one embodiment, as shown in figure 4, the conducting wire of piezoelectric element 11 is exported via intermediate throughholes 5, in order to avoid in
Between through-hole 5 edge abrasion conducting wire, set chamfering structure at least one of two apertures of the intermediate throughholes 5.
In another preferred embodiment, two in two apertures of the intermediate throughholes 5 are disposed as down
Corner structure, chamfering structure are preferably rounding corner structure.
In one embodiment, as shown in Fig. 5 a) and Fig. 6, the wire connecting portion 4 includes no convex plane 8；The no convex
For fixing the conducting wire of the piezoelectric element 11 of the piezoelectric transducer in plane 8；The intermediate throughholes 5 are flat through the no convex
Face 8.
Prevent from vibrating the influence to conducting wire to moderate to preferably improve, the wiring construction 2 is mounted on the metal
When on shielded lead cover 1, the center line of the first through hole 6 and the center line of the intermediate throughholes 5 are overlapped.
In one embodiment, the mounting portion 3 is Ceramic manufacturing part, effectively reduces triboelectric electrical noise.
For the ease of to metallic shield lead cover 1 to outer lead, the no convex plane 8 includes metal covering, in this way, internal
Conducting wire is imported on metal covering, is being faced out lead via metal, is being thereby realized the lead of from-inner-to-outer.Metal covering can
Conduction realizes inside and outside signal transduction.
In the following, installation form of the wiring construction 2 on the metallic shield lead cover 1 is described.
In one embodiment, as Fig. 5 a) arrives 5d) shown in, pass through between 1 side wall of metallic shield lead cover and top surface
Hollows 9 connect, and the mounting base is arranged on the hollows 9.Such position ensures that convenient arrange in hollows 9 connects
Cable architecture, while lead wiring position is not take up the excessive space between shell 10 and metallic shield, realize space has
Effect utilizes.
In one embodiment, the metallic shield lead cover 1 is semiclosed cylinder copper cover structure.
The present invention also proposes a kind of piezoelectric transducer.As shown in fig. 6, in a preferred embodiment, piezoelectric transducer packet
Shell 10, piezoelectric element 11 and pedestal 12 are included, the piezoelectric element 11 is connect with the pedestal 12, and is located in the shell 10
Portion, including above-mentioned metallic shield lead cover 1, the bottom opening of the metallic shield lead cover 1 is connect with the pedestal 12, with
The piezoelectric element 11 of the piezoelectric transducer is closed, the shell 10 is located at the outside of the metallic shield lead cover 1, described outer
Shell 10 and the metallic shield lead cover 1 constitute the double-deck electromagnetic shielding, improve electromagnetic interference capability, it is ensured that the clamped stabilization of lead
Property.
In one embodiment, it is connected between the metallic shield lead cover 1 and the shell 10 by shock-damping structure 13
It connects, improves the aseismic reliability of wire structures.
In a preferred embodiment, for the ease of the arrangement of shock-damping structure 13, the top of metallic shield lead cover 1 is arranged
For flat structure, seismic stability can be improved convenient for the plus-minus shake cushion rubber between double-layer shielding structure material.
In a preferred embodiment, for the ease of the arrangement of shock-damping structure 13, the shell 10 includes end cap 14, metal screen
It covers and is connected between lead cover 1 and the end cap 14 by shock-damping structure 13.
As shown in fig. 6, in one embodiment, the piezoelectric element 11 draws two-way outlet and passes through metallic shield lead respectively
Cover 1 is drawn, wherein all the way through built-in circuit fly line to 1 wiring construction of metallic shield lead cover, then is transferred lead by wiring construction
It is connected to accessory power outlet 15；Another way is connected by the pedestal 12 and metallic shield lead cover 1 of piezoelectric element 11, is drawn by metallic shield
1 lead of irdome is connected to accessory power outlet 15.Thus it is ensured that can be reduced easily by 15 Position Design of socket as close as possible to pedestal 12
Gravity Centre of Product improves structural stability when vibration measurement, in turn avoids operating for the too low caused conducting wire welding of socket 15
Property
The present invention can using in a variety of piezoelectric transducers, the piezoelectric element 11 be annular shearing class piezoelectric element 11 or
The structure of central compressed piezoelectric element 11, metallic shield separate terminal enclosure can adapt to annular shearing class piezoelectricity in top opening as needed
Component 11 is also suitable for central compressed piezoelectric element 11, fills inner hole or screw and the secondary knot of shielding case realization using wherein feeling at ease
Structure is fixed.
The present invention also proposes a kind of lead method of above-mentioned piezoelectric transducer, in one embodiment, lead method packet
Include following steps:
1) 1 inside piezoelectric element of metallic shield lead cover, 11 conducting wire is drawn by wiring construction 2, while by the piezoelectricity
The socket 15 of sensor is burn-on the first conducting wire 16 and the second conducting wire 17, is insulated on 17 sets of the first conducting wire 16 and the second conducting wire respectively
Casing assembles the socket 15 of the piezoelectric transducer on the shell 10；
2) by after metallic shield lead cover 1 and 12 tight fit of pedestal assembly, apply epoxy resin in junction and consolidate
Change, then the metal connection face after 11 conducting wire of piezoelectric element trimming length with wiring construction 2 be welded and fixed,
3) it will be welded and fixed after the first conducting wire 16 trimming length with wiring construction 2, form the electrical signal paths of insulation against ground；
4) it will be welded and fixed after the second conducting wire 17 trimming length with 1 outer wall of metallic shield lead cover, be used to form earth-return
Signal path；
5) welded seal after 14 lining damping cushion rubber of the end cap of piezoelectric transducer is formed into shell 10, with the metallic shield
The double-deck electromagnetic armouring structure that can transmit single channel signal is collectively formed in 1 body of lead cover.
In a preferred embodiment, the step 4) further comprises: welding on 1 outer wall of metallic shield lead cover
Connect solder, by the second conducting wire 17 trim length after be welded and fixed at the welding filler metal on 1 outer wall of metallic shield lead cover.
Specifically, wiring construction 2 is Ceramic manufacturing part, intermediate throughholes 5 process the conducting wire that chamfering is used to connect internal component,
5 convex of intermediate throughholes is used to assemble with the inner hole of shielding case, and assembly connection is fixed with epoxide-resin glue cementation, wiring construction 2
No convex plane 8 metallizes, and generally plates silver electrode.It is plated at 2 rounded corner of wiring construction in metallic shield cover outer wall
Upper welding filler metal.
1 internal component conducting wire of metallic shield lead cover can initially pass through the extraction of 2 through-hole of wiring construction, while socket 15 being burn-on
First conducting wire 16 and the second conducting wire 17 (and fluorubber casing is put on, it is assemblied on shell 10.Then by metallic shield lead cover 1
It encloses epoxy resin with filling upper one in bottom after the assembly of 12 tight fit of pedestal of piezoelectric element 11 and solidifies, then by internal component conducting wire
It is welded and fixed after trimming length with the metallized pads of wiring construction 2, then the first conducting wire 16 drawn from socket 15 is trimmed
Metallized pads after length with wiring construction 2 are welded and fixed, and form the electrical signal paths of insulation against ground, the trimming of the second conducting wire 17
It is welded and fixed after length at metallic shield cover outer wall plating welding filler metal, is used to form earth-return signal path.Finally by end cap
14 lining damping cushion rubber laser welded seals form the double-deck electromagnetic armouring structure that can transmit single channel signal.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.With
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection scope of invention.
Claims (10)
1. a kind of metallic shield lead cover can close the piezoelectric element of the interior of shell of piezoelectric transducer, feature
It is, wiring construction is arranged on the metallic shield lead cover, and the conducting wire of the piezoelectric element of the piezoelectric transducer passes through described
Wiring construction is fixed.
2. metallic shield lead cover as claimed in claim 2, which is characterized in that the wiring construction is detachably arranged in described
On metallic shield lead cover, including main body, the main body include mounting portion and wire connecting portion；The mounting body, being capable of institute and institute
The mounting structure cooperation on metallic shield lead cover is stated, the wiring construction is mounted on the metallic shield lead cover；
The wire connecting portion is capable of fixing the conducting wire of the piezoelectric element of the piezoelectric transducer.
3. metallic shield lead cover as claimed in claim 2, which is characterized in that the mounting portion includes being provided with intermediate throughholes
Convex, the mounting structure on the metallic shield lead cover includes that the mounting structure on the metallic shield lead cover includes the
One through-hole, the first through hole are connected to the inside and outside of the metallic shield lead cover；By by the intermediate throughholes convex
It is inserted into the first through hole, the wiring construction is mounted on the metallic shield lead cover；The intermediate throughholes
At least one of two apertures are set as chamfering structure.The wire connecting portion includes no convex plane；In the no convex plane
For fixing the conducting wire of the piezoelectric element of the piezoelectric transducer；The intermediate throughholes run through the no convex plane.
4. metallic shield lead cover as claimed in claim 3, which is characterized in that the wiring construction is mounted on the metal screen
When covering on lead cover, the center line of the center line of the first through hole and the intermediate throughholes is overlapped；The mounting portion is ceramics
Workpiece, the no convex plane includes metal covering；Connected between the metallic shield lead cover side wall and top surface by hollows
It connects, the mounting base is arranged on the hollows, and the metallic shield lead cover is semiclosed cylinder copper cover structure.
5. a kind of piezoelectric transducer, including shell, piezoelectric element and pedestal, the piezoelectric element is connect with the pedestal, and position
In the interior of shell, which is characterized in that including any metallic shield lead cover of claim 1-4, the metal screen
The bottom opening for covering lead cover is connect with the pedestal, and to close the piezoelectric element of the piezoelectric transducer, the shell is located at
The outside of the metallic shield lead cover, the shell and the metallic shield lead cover constitute the double-deck electromagnetic shielding.
6. piezoelectric transducer as claimed in claim 5, which is characterized in that between the metallic shield lead cover and the shell
It is connected by shock-damping structure；The shell includes end cap, passes through shock-damping structure between metallic shield lead cover and the end cap
It is connected.
7. piezoelectric transducer as claimed in claim 5, which is characterized in that the piezoelectric element draws two-way outlet and passes through gold respectively
Belong to shielded lead cover to draw, wherein all the way through built-in circuit fly line to metallic shield lead cover wiring construction, then by wiring construction
Switching lead is connected to accessory power outlet；Another way is connected by the pedestal of piezoelectric element with metallic shield lead cover, by metallic shield
Lead cover lead is connected to accessory power outlet.
8. the piezoelectric transducer as described in claim 5-7 is any, which is characterized in that the piezoelectric element of the piezoelectric transducer is
Annular shearing class piezoelectric element or central compressed piezoelectric element.
9. a kind of lead method of the piezoelectric transducer as described in claim 5-7 is any, which is characterized in that including following step
It is rapid:
1) by piezoelectric element conducting wire inside metallic shield lead cover by wiring construction extraction, while by the piezoelectric transducer
Socket is burn-on the first conducting wire and the second conducting wire, and the insulating sleeve on the first conducting wire and the second wire sleeve, the piezoelectricity is passed respectively
The socket assembly of sensor is on the housing；
2) by after metallic shield lead cover and pedestal tight fit assembly, apply epoxy resin in junction and solidify, then will
It is welded and fixed with wiring construction after piezoelectric element conducting wire trimming length,
3) it will be welded and fixed after the first conducting wire trimming length with wiring construction, form the electrical signal paths of insulation against ground；
4) it will be welded and fixed after the second conducting wire trimming length with metallic shield lead cover outer wall, it is logical to be used to form earth-return signal
Road；
5) welded seal after the end cap lining damping cushion rubber of piezoelectric transducer is formed into shell, with the metallic shield lead cover
The double-deck electromagnetic armouring structure that can transmit single channel signal is collectively formed.
10. method as claimed in claim 9, which is characterized in that the step 4) further comprises: drawing in the metallic shield
Welding filler metal on irdome outer wall will weld after the second conducting wire trimming length at the welding filler metal on metallic shield lead cover outer wall
It is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491762.0A CN109632079B (en) | 2018-12-07 | 2018-12-07 | Metal shielding lead cover, piezoelectric sensor and lead method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491762.0A CN109632079B (en) | 2018-12-07 | 2018-12-07 | Metal shielding lead cover, piezoelectric sensor and lead method |
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| Publication Number | Publication Date |
|---|---|
| CN109632079A true CN109632079A (en) | 2019-04-16 |
| CN109632079B CN109632079B (en) | 2022-03-22 |
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| CN201811491762.0A Active CN109632079B (en) | 2018-12-07 | 2018-12-07 | Metal shielding lead cover, piezoelectric sensor and lead method |
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