CN104390532B - A kind of bridge-wire electric detonator high-effect electrostatic protection component of wafer-type TVS pipe - Google Patents
A kind of bridge-wire electric detonator high-effect electrostatic protection component of wafer-type TVS pipe Download PDFInfo
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- CN104390532B CN104390532B CN201410659194.6A CN201410659194A CN104390532B CN 104390532 B CN104390532 B CN 104390532B CN 201410659194 A CN201410659194 A CN 201410659194A CN 104390532 B CN104390532 B CN 104390532B
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Abstract
The present invention relates to a kind of bridge-wire electric detonator high-effect electrostatic protection component of wafer-type TVS pipe, a disc PCB and two TVS pipe electrostatic protection electronic devices are included.Wherein one TVS pipe is in parallel by the fiery loop of circuit board and pin human hair combing waste, and another TVS pipe is in parallel with pin shell ignition loop by circuit board.The reverse side of PCB arranges two zigzag discharge electrodes, the air-gap electrostatic leakage passage between Can inwall composition pin shell, the double insurance effect that constitutes pin shell electrostatic protection in parallel with electrostatic protection device of zigzag discharge electrode.The electrostatic protection component of the present invention can reach more than human body electrostatic 50kV to pin shell and pin foot protection effect, and can be subjected to the repeat impact of static discharge without occurring any performance change.
Description
Art
Patent of the present invention belongs to electric spark workpiece electrostatic protection electronic device, is particularly suitable for responsive type bridge-wire electric detonator
High-effect electrostatic protection electronic device.
Background technology
Existing igniter wire formula commercial electric detonator is easily influenceed generation performance by electrostatic, stray electrical current in use
Change or accidental ignition.During the production of priming system and armament systems, assembling, storage, transport, operation and maintenance etc.,
The harm generally existing of static discharge, the characteristics of electrostatic has high voltage, low energy, high transient state, the coupling of electrostatic discharge energies
The ignition quality (sensitivity, time of ignition etc.) and security performance (safe current etc.) of electric spark workpiece may be impacted, very
To misfire or accidental ignition is caused, system task can not be completed or is caused casualties.
The existing electrostatic protection technological approaches of electric cap is that setting insulating materials is insulated with improving its between using pin-shell
Intensity, so as to improve electrostatic breakdown voltage, or sets air-gap, applies conducting resinl, electric capacity of releasing, semiconductor electric discharge between pin-shell
The electrostatic leakage such as pipe passage improves the antistatic capacity of pin-shell；And the raising of the antistatic effect of pin-pin only increases at present
The technical measures such as big bridge wire diameter, increase bridging plug contact area, raising igniting gunpowder bursting point.Pass through above electrostatic protection technology way
One of footpath or combination, so that electric cap reaches GJB 5309.14-2004《The part of priming system test method the 14th：Static discharge
Experiment》、MIL-DTL-23659F-2010《Electric initiator universal design specification》、GBT8031-2005《Commercial electric detonator》Deng mark
Human body electrostatic 25kV security requirement as defined in accurate.But the electrostatic environment, electromagnetic environment with industry and battlefield are disturbed
Increasingly enhancing, as people improve to the understanding of electrostatic interaction mechanism, it has been found that traditional industrial standard and army's mark standard
The safety indexes of maximum static electricity on human body's voltage (military electric spark workpiece 25kV, civilian electric cap 10kV) of middle formulation can not
The use environment requirement of modern priming system is completely covered, met, static electricity on human body's environment the harshest can not be represented.Such as ordnance
Engineering college Liu Shang closes academician and U.S. Sang Diya laboratories, the extreme human body electricity of American Institute of Electrical and Electronics Engineers's report
Data-Statistics result is pressed, wherein《Britain's antistatic general specification》For 50kV,《U.S.'s protection test handbook》For 40kV,《Beijing state
Border electrostatic meeting》For 35kV~50kV, Ordnance Engineering College's result of study is 60kV.And it is electric under the effect of these electrostatic extremums
Initiator Safety analysis of experiments and theory analysis are rarely reported.In addition, electric spark workpiece can not among the processes such as use, transport
The meeting avoided is reported in conducting resinl, electric capacity of releasing, semiconductor discharge tube are applied between pin-shell at present by multiple electrostatic impact
The electrostatic potential highest that mode carrys out protection base-shell electrostatic hazard can reach antistatic 25kV, but when electrostatic potential is higher than 25kV
The protection effect of Shi Shangshu electrostatic protection technologies can be substantially reduced, and electric capacity of releasing, semiconductor discharge tube are it cannot be guaranteed that electric spark workpiece
Performance is sustained damage or accidental ignition, and the protection effect of conducting resinl can be substantially reduced after high-pressure electrostatic is acted on 3 times, multiple discharge
Result even in conducting resinl and lose antistatic capacity, and above-mentioned all electrostatic protection technologies can not be to sensitive electric spark workpiece
Pin-pin loop is protected.Therefore this requires that higher electrostatic potential can be protected, by after multiple electrostatic impact by finding one kind
Protection effect is constant, the technology that protective device is miniaturized of protection can be particularly realized to sensitive electric spark workpiece pin-pin loop
Scheme.
Electrostatic prevention structure disclosed in Chinese patent CN201210540239.9 is in one transverse discharge of detonator rear end extrapolation
Metal connecting piece, size is larger, does not apply to long payment to a porter or small size detonator.Use and crimp between metal connecting piece and detonator wire
Mode is connected, and is easily caused electrode delamination and protection circuit open circuit, electrostatic discharge protective circuit is failed.Outside plug type discharge metal is connected
Part lifts the manufacturing process difficulty of detonator, if extrapolation easily causes accidental ignition and caused danger after detonator shaping, and in detonator
Extrapolation brings very big inconvenient and trouble for the manufacturing process of detonator before shaping, while extrapolation transverse discharge metal connecting piece meeting
Use to detonator brings limitation, and extrapolation transverse direction large circuit board is easy to come off in the case of guided missile high overload is constituted to system
Danger, at not unnecessary use space, extrapolation transverse direction large circuit board will bring danger to whole system.And the patent is not
It is described the protection effect of electrostatic.
Electrostatic prevention structure disclosed in Chinese patent CN201220055188.6 is served only in semiconductor bridge detonator, and
Only from 1 corner discharge during protection base-shell electrostatic, because product can pass through at least 3 to 5 person-times in transport, assembling process
Product is discharged, fusing deformation is likely to result in after once discharging to sawtooth, so as to lose electrostatic protection effect, multiple discharge
It can be caused danger after impact；The patent does not provide protection effect simultaneously, does not also propose to carry out resisting multiple electrostatic
Impact, does not more propose the size of product size.
The content of the invention
It is higher than 25kV electrostatic potentials and multiple electrostatic impact in order to anti-, patent of the present invention provides a kind of anti-extreme human body
The high-effect electrostatic protection component of electrostatic potential, it is not only protected to pin-shell but also to pin-pin static discharge, also simultaneously
Multiple electrostatic impact can be protected.
Patent of the present invention solves the technical scheme that its technical problem used：
For the operating voltage of highest static electricity on human body's voltage extremum 50kV, maximum surge current 500A and electric cap, according to
It is secondary determine the maximum surge current of TVS pipe, peak power, working inverse voltage, clamp voltage (breakdown voltage), on surge current
The parameters such as the time of liter, surge current discharge time, then for the mounting structure and size of electric cap, then determine the shape of TVS pipe
With size, assembly technology, shape, wire structures and the size of PCB are finally determined.
For small size electric cap pin-pin and the performance requirement and installation requirement of pin-shell electrostatic protection electronic device, carry
Go out a kind of disc PCB scheme, have following function concurrently：Fixed electrostatic protection electronic device, be connected with payment to a porter circuit and
Electrostatic leakage the air gap between the connection of shell circuit, offer pin shell.The circuit structure of the PCB includes three abnormity gold
Belong to pad, two metal discharge poles, two metallization vias.
The front of PCB arranges three profiled metal pads, longer rectangular pads, a shorter square
Shape pad and a circular arc pad；The first half of longer rectangular pads and shorter rectangular pads partner electrode, for even
Connect the two poles of the earth of a SMD two-way TVS pipe electrostatic protection electronic device of miniaturization, make electrostatic protection device and electric spark workpiece pin-
Human hair combing waste fire loop constitutes parallel circuit, forms pin-pin electrostatic leakage passage；The lower half of longer rectangular pads and circular arc pad
Another pair electrode is constituted, the two poles of the earth of SMD two-way TVS pipe electrostatic protection electronic device are miniaturized for connecting another, make quiet
Electric protective device constitutes parallel circuit with electric spark workpiece pin-shell ignition loop, forms electrostatic leakage passage between pin-shell；Only connect
Then only possesses the safeguard function in corresponding electrostatic firing loop during one electrostatic protection device, if two electrostatic protection devices of connection
Shi Ze is provided simultaneously with the safeguard function in electric spark workpiece pin-pin, pin-shell electrostatic firing loop.
The reverse side of PCB arranges the zigzag discharge electrode of two symmetric shapes, for the anti-of pin shell static discharge
Shield, and multiple electrostatic discharge protective can be realized, zigzag discharge electrode is in parallel with electrostatic protection device to constitute pin-shell electrostatic protection
Double insurance effect.
For small size electric cap to extreme electrostatic potential and the requirement of shelter of multiple high voltage electrostatic discharge, the present invention is proposed
A kind of miniaturization high-effect electrostatic protection component of wafer-type TVS pipe, including disc PCB, one with pin-pin
TVS pipe and a TVS pipe in parallel with pin-shell in parallel.
One of described high-effect electrostatic protection component key technology is the design method of electrostatic protection device parameter selection.
The maximum reverse operating voltage of the TVS pipe is smaller, and the shunting to electric spark workpiece pin pin electrostatic discharge energies is better.TVS pipe
Working inverse voltage selects to be higher than the normal working voltage of sensitive electric spark workpiece, and working inverse voltage is too low then may influence electricity
The normal working performance of priming system, and the too high clamp voltage that can make TVS pipe is also higher, the electrostatic protection to sensitive electric spark workpiece
Effect is unfavorable.When the two poles of the earth of TVS pipe are applied with reverse electrostatic discharge pulses and are higher than its breakdown voltage, its two interpolar is by high resistant
It is anti-to be extremely rapid changed into Low ESR, make two interpolar voltage clamps in the predetermined value of a low voltage, make sensitive electrical firer
Damage or ignition of the product from high-pressure electrostatic pulse.After high-pressure electrostatic transient pulse disappears, two interpolars of TVS pipe are returned to again
High impedance status originally, does not interfere with the normal electrical property of protected device.By theoretical calculation and verification experimental verification, appropriate choosing
TVS pipe performance parameter is selected, the split ratio to sensitive electric spark workpiece pin pin electrostatic discharge energies can reach more than 95%.Such as it is directed to
The normal firing voltage 12V/6.8 μ F of electric spark workpiece, during the protective device selection two-way TVS pipe of SMDJ18CA types, maximum reverse work
Make voltage for 18V, maximum reverse operating voltage is higher than 1.5 times of the normal firing voltage of electric spark workpiece, then with static discharge electricity
50kV is pressed to carry out electric test, the maximum discharge current produced in single RC loop standards static electric charge model circuit is 100A, and is flowed into
The current peak of electric spark workpiece only has 5A, and the current peak for flowing into TVS pipe is that the split ratio of 95A, i.e. TVS pipe is 95%, is passed through
The electrostatic discharge energies of electric spark workpiece are reduced to 0.000079J from 0.64J, i.e., only about the electrostatic energy of a ten thousandth flows into electricity
Priming system igniter wire ignition loop.The protection effect highly significant of TVS pipe as can be seen here.
For the electrostatic protection between pin shell, shown by a large amount of ESD tests, for pin shell electrostatic firing voltage
2.3kV sensitive electric spark workpiece, when using the same two-way TVS pipe of SMDJ18CA types as protective device, puts for electrostatic
Piezoelectric voltage 50kV, it is quiet with single RC loop standards static electric charge model circuit and Sandia static electric charge models, three kinds of IEEE static electric charge models circuit
Electric model circuit is carried out in discharge test to the sensitive electric spark workpiece pin shell, can reach antistatic more than voltage 50kV.
The antistatic capacity of described high-effect electrostatic protection component is much higher than existing military standard and industrial standard
To the ceiling voltage 25kV technical indicators of Electrostatic Safety for Electric Explosive Device requirement, pin-pin and pin-shell antistatic capacity can be with
Anti- extreme more than static electricity on human body 50kV is reached, and the security requirement of anti-50kV multiple static discharge can be reached.
The beneficial effects of the invention are as follows：(1) antistatic capacity of the high-effect electrostatic protection component of TVS pipe of the invention is big
The ceiling voltage 25kV technical indicators required higher than existing military standard and industrial standard Electrostatic Safety for Electric Explosive Device greatly,
Pin-pin and pin-shell antistatic capacity can reach anti-extreme more than static electricity on human body 50kV, and can reach anti-50kV's
The security requirement of multiple static discharge.(2) circular PCB size is small, and diameter only has 3.4mm~4.2mm, thickness
0.3mm~0.5mm, the PCB can assemble the SMD TVS pipe electrostatic protection device of 2 miniaturizations, and can assemble
On the electrode plug of same diameter and in the electric spark workpiece shell of same inner diameter.(3) thickness of wafer-type TVS pipe electrostatic protection component
Degree only has 0.8mm~1.5mm, and very little is highly influenceed on electric spark workpiece.
The invention will be further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is electrostatic protection assembly circuit plate wiring front view.
Fig. 2 is electrostatic protection assembly circuit plate wiring reverse view.
Fig. 3 is that SMD TVS pipe structural representation is installed on electrostatic protection assembly circuit plate.
Fig. 4 is glass electrode plug structure profile.
Fig. 5 is high-effect electrostatic protection component and electrode plug assembling schematic diagram.
Fig. 6 is high-effect electrostatic protection component and electric cap assembling schematic diagram.
Fig. 7 is TVS pipe power and electrostatic power graph of a relation
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, antistatic plate include the PCB plectanes 1 in two holes of a band, three metal pads 2,5,6,
After two metallization vias 2,3 and two copper-clad plates 7,8 with sawtooth, two hole metallizations of the pcb board 1 in two holes of band just
Two metallization vias 2,3 are formd, the high top in hole is highly consistent, highly consistent with copper-clad plate below with metal pad, in PCB
The top of plate 1 is connected one with the rectangular metal pad 4 centered on chamfering and the hole center of circle with a metallization via 2；Another gold
Categoryization via 3 is connected another short rectangular metal pad 5；There are the edge phase of one and PCB plectanes under this short soldering plate 5
Neat arc pad 6；Below pcb board with two metallization vias 2,3 be connected two arc copper-clad plates 7 with multiple sawtooth,
8.Two rectangular metal pads 4,5 weld the two poles of the earth of protection base-pin TVS pipe 9, and long rectangular pads 4 are welded with curved metal pad 6
The two poles of the earth of protection base-shell TVS pipe 10, so as to form the antistatic plate with TVS pipe.
Wherein edge of the Chamfer Edge of metal pad 4 away from PCB plectanes is not less than 0.5mm, and metal pad spacing used is not small
In 0.3mm.Arc copper-clad plate 7,8 with multiple sawtooth, sawtooth wedge angle is 60 degree, and sawtooth point is 0.5mm away from PCB plectanes edge,
Two copper-clad plates 7,8 spacing are not less than 0.5mm.
With reference to Fig. 3-6, the bridge-wire electric detonator of the antistatic environment of patent of the present invention includes band TVS pipe antistatic plate, electrode
Plug 12, igniter wire 11, ignition charge, priming, output medicine, shell 16, will be welded the copper-clad plate 7,8 one of the antistatic plate of TVS pipe
Side is combined after the bottom 13 (other side of welding igniter wire) of electrode plug passes through payment to a porter 14,15 by the via 2,3 that metallizes,
Because copper-clad plate higher than pcb board 1 forms air-gap between copper-clad plate and housing 16, metallization via 2,3 is welded with payment to a porter 14,15
Connect, according to detonator manufacture craft formation detonator, closing in back casing 16 is connected with arc pad 6.So as in protection base-shell electrostatic
The existing air-gap of aspect has TVS pipe again, is protected in protection base-pin electrostatic with TVS pipe.
The need for for Bridgewire EED pin pin electrostatic discharge protective, following several sides are considered as in the type selecting of TVS pipe
Face content：
1. the positive and negative two kinds of senses of current of injection of the actual static discharge between pin pin are likely to, therefore, are selected two-way
TVS, the static discharge current injection to any direction can act as protective effect.
2. TVS maximum reverse operating voltage VRWM(TVS leakage current only has a few μ A under this voltage) is greater than and protected
The normal working voltage of device, is prevented during priming system normal work because TVS is shunted and influences performance.
3. TVS clamp voltage Vc is the spacing voltage of TVS pipe highest, and it is less than the static damage electricity of protected device
Pressure, this makes it possible to be effectively protected device.
4. TVS peak power will observe TVS pipe power and be chosen with electrostatic power graph of a relation, otherwise will likely burn out TVS.
5. the response time is exactly that TVS pipe voltage reaches that operating voltage started to the time played a protective role, and it has to
Less than the time of static discharge.
Electrode plug 3.45 × 3mm of size of sample, igniter wire is 10 μm of PtW alloys, the Ω of product resistance 3~9, ignition work electricity
12V (6.8 μ F) is pressed, the energy that priming system is acted on when can calculate normal work is 4.9 × 10-4J；The critical hair of pin pin electrostatic
Thermoelectricity presses 18.45kV, can obtain electric spark workpiece operating voltage maximum no more than 22.14V, peak power 88.6W.
Protective device Selecting All Parameters foundation：
(1) according to product specification, sample normal working voltage is 12V (6.8 μ F), and reliability considered nargin, then this fire
The reliable firing voltage of work product is 12V；
(2) show that the critical firing voltage of sample electrostatic environment is 18.45kV according to the experiment of product electrostatic, can be calculated firer
The voltage of product two ends loading is 22.14V, and security consideration nargin is 1.3, then this priming system electrostatic maximum voltage of misfiring is
15.5V；
(3) security reliability of the selection combination product of protective device come determine protective device parameter choose, therefore choosing
Take TVS pipe maximum reverse operating voltage VRWMShould be between 12V~15.5V；
(4) selection of TVS pipe clamp voltage misfires voltage for 15.5V less than priming system electrostatic maximum；
(5) rise time is received to be several when can draw static discharge by old xerographic paper discharge current time waveform
Second, thus the response time of protective device must be smaller than nanosecond (10-9s)；
(6) according to the mono- RC models of electrostatic discharge environments 50kV (series connection 5k Ω) of the limit, calculating power is 598.56W, quiet
Discharge of electricity environment 50kV discharge times are no more than 1 μ s, further according to TVS pipe power and electrostatic power graph of a relation, therefore TVS pipe power
It is set to not less than 100W.
Therefore choosing TVS pipe maximum reverse operating voltage, V should (margin of safety be 1.3 between 12V~15.5V；If low
In 12V, then sample is by cisco unity malfunction, higher than 15.5V, and TVS pipe will not play protective action).This sample chooses P6KE12CA
Type and the two-way TVS pipes of ESD12V32D-C.
Patent of the present invention has the technical effect that antistatic plate made using the design with multiple sawtooth copper-clad plates between pin-shell
The air-gap of multiple discharge breakdowns is formed, while be connected by the via that metallizes with payment to a porter, curved metal pad is connected with housing,
So that payment to a porter and housing connect the two poles of the earth of TVS pipe respectively, so as to play dual fail-safe in protection base-shell static discharge, pin-shell is prevented
Shield effect has been able to static electricity on human body 50kV, is doubled than 25kV in GJB5309.14；Pass through via and the pin of metallizing
Line is connected so that two payment to a porter are connected with the two poles of the earth of TVS pipe respectively, are played a role in protection base-pin electrostatic, and this is that forefathers are not had
Had, pin-foot protection effect has been able to static electricity on human body 50kV；Because the characteristic of TVS pipe is determined either in pin-shell
Protection still can be subjected to the repeat impact of static discharge without occurring any change on pin-foot protection.
It is worth noting that, the foregoing is only presently preferred embodiments of the present invention, the patent of the present invention is not thereby limited
Protection domain, the present invention can also carry out the improvement of material and structure to the construction of above-mentioned various parts, or use skill
Art equivalent is replaced.Therefore it is all with the present invention specification and diagramatic content made equivalent structure change, or directly or
Apply to other correlative technology fields indirectly to be similarly all contained in the range of of the invention cover.
Claims (8)
1. a kind of high-effect electrostatic protection component of wafer-type TVS pipe, including disc PCB (1), one with pin-
Pin TVS pipe and a TVS pipe in parallel with pin-shell in parallel, it is characterized in that the positive long rectangular metal pad of PCB
(4) the two poles of the earth structure of the SMD TVS pipe electrostatic protection device (9) of first miniaturization, is connected between short rectangular metal pad (5)
Into the electrostatic leakage passage in parallel with pin-pin igniter wire ignition loop, the positive long rectangular metal pad (4) of circuit board, arc gold
The two poles of the earth for belonging to the SMD TVS pipe electrostatic protection device (10) for connecting second miniaturization between pad (6) are constituted and pin-shell medicine
Agent ignition hazard passage electrostatic leakage passage in parallel, the zigzag that the reverse side of PCB arranges two symmetric shapes is covered
Copper coin discharge electrode, as electrostatic leakage loop, zigzag copper-clad plate discharge electrode and second between Can inwall composition pin-shell
Only SMD TVS pipe parallel connection constitutes the double insurance effect of pin-shell electrostatic protection.
2. high-effect electrostatic protection component according to claim 1, it is characterized in that antistatic capacity is higher than existing military
The ceiling voltage 25kV technical indicators that standard and industrial standard are required Electrostatic Safety for Electric Explosive Device, pin-pin and pin-shell electrostatic
Protective capacities can reach anti-extreme more than static electricity on human body 50kV, and can reach the peace of anti-50kV multiple static discharge
Full property requirement.
3. high-effect electrostatic protection component according to claim 1, it is characterized in that the miniaturization of circular PCB, directly
Footpath only has 3.4mm~4.2mm, and thickness only has 0.3mm~0.5mm, and the PCB can accommodate the patch of first miniaturization
The wiring of the SMD TVS pipe electrostatic protection device (10) of chip TVS pipe electrostatic protection device (9) and second miniaturization and dress
Match somebody with somebody；And may be mounted on the small size electrode plug of same diameter and in the small size electric spark workpiece shell of same inner diameter.
4. high-effect electrostatic protection component according to claim 1, it is characterized in that being arranged on the front of PCB (1)
Three profiled metal pads, the metal pad (4) of a longer rectangle, the metal pad (5) of shorter rectangle and
The metal pad (6) of one circular arc；The first half and short rectangular metal pad (5) of long rectangular metal pad (4) partner
Electrode, the two poles of the earth for connecting first SMD TVS pipe electrostatic protection device (9), the TVS pipe protective device and electric firer
The fiery loop of product pin-human hair combing waste constitutes parallel circuit, forms pin-pin electrostatic leakage passage；The lower half of long rectangular metal pad (4) and
Curved metal pad (6) constitutes another pair electrode, and two for connecting second SMD TVS pipe electrostatic protection device (10)
Pole, the TVS pipe protective device constitutes parallel circuit with electric spark workpiece pin-shell medicament ignition loop, and electrostatic is let out between forming pin-shell
Put passage；Then only possesses the safeguard function in corresponding electrostatic firing loop when only connecting an electrostatic protection device, if connection two
The safeguard function of electric spark workpiece pin-pin, pin-shell electrostatic firing is then provided simultaneously with during electrostatic protection device.
5. high-effect electrostatic protection component according to claim 1, it is characterized in that the reverse side of PCB arranges two
The zigzag copper-clad plate discharge electrode of symmetric shape, zigzag corner angle is 60 degree, and the wedge angle number of teeth takes 5~8 wedge angles, uniform point
Cloth, each wedge angle and PCB (1) outer rim stay 0.3mm the air gap, as constituting pin-shell with Can inwall
Between electrostatic leakage loop, zigzag copper-clad plate discharge electrode is in parallel with second SMD TVS pipe to constitute the double of pin-shell electrostatic protection
Weight safety effect.
6. high-effect electrostatic protection component according to claim 1, it is characterized in that electrostatic protection device parameter selection is set
Meter method, the TVS pipe must be two-way TVS pipe, and maximum reverse operating voltage is smaller, to electric spark workpiece pin-pin static discharge
The shunting of energy is better, and the working inverse voltage selection of TVS pipe is higher than the normal working voltage of sensitive electric spark workpiece, reverse work
Make the normal working performance of the too low then influence electric spark workpiece of voltage, and the too high clamp voltage that can make TVS pipe is also higher, to sensitivity
The electrostatic protection effect of electric spark workpiece is unfavorable, for the normal firing voltage 12V/6.8 μ F of certain electric spark workpiece, selects SMDJ18CA
The two-way TVS pipe of type is as protective device, and maximum reverse operating voltage is 18V, for static discharge voltage 50kV, in single RC loops
The maximum discharge current produced in standard electrostatic precircuit is 100A, and the current peak for flowing into TVS pipe is 95A, and flows into electricity
The current peak of priming system only has 5A, and the split ratio of TVS pipe is 95%, by the electrostatic discharge energies of electric spark workpiece pin-pin from
0.64J is reduced to 0.000079J, and only about the electrostatic energy of a ten thousandth flows into electric spark workpiece igniter wire ignition loop.
7. high-effect electrostatic protection component according to claim 1, it is characterized in that when PCB is fitted into electric spark workpiece
Facing to electrode plug side, and between electrode plug, inner wall of tube shell, reservation a thin layer the air gap is constituted zigzag discharge electrode one
Air-gap electrostatic leakage passage, wherein electrode plug material are must not in plastics, glass or ceramics, the air gap electrostatic leakage passage
Gluing and filling other materials, discharging gap position should be arranged in the place as far as possible away from priming system powder charge, and ensure and powder charge
Between have a medium cut-off, the first metallization via (2) of PCB forms circuit company with the first payment to a porter (14) using welding
Connect, the second plated through-hole (3) and the second payment to a porter (15) form circuit connection using welding, pass through shell bottling technique or conducting resinl
Technique makes the arc pad (6) of PCB be connected with shell formation circuit.
8. high-effect electrostatic protection component according to claim 1, it is characterized in that wafer-type TVS pipe electrostatic protection component
Thickness only has 0.8mm~1.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410659194.6A CN104390532B (en) | 2014-11-18 | 2014-11-18 | A kind of bridge-wire electric detonator high-effect electrostatic protection component of wafer-type TVS pipe |
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| CN201410659194.6A CN104390532B (en) | 2014-11-18 | 2014-11-18 | A kind of bridge-wire electric detonator high-effect electrostatic protection component of wafer-type TVS pipe |
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| CN107809898B (en) * | 2017-11-29 | 2020-08-04 | 四川蓝狮科技有限公司 | Antistatic mechanism for electric initiating explosive device |
| CN108238582B (en) * | 2018-01-10 | 2020-07-10 | 北京理工大学 | Micro-scale MEMS energy dredging device applied to fuze and preparation method thereof |
| CN110530216A (en) * | 2019-08-14 | 2019-12-03 | 无锡纳瓦特电子股份有限公司 | A kind of novel time-lapse electronic ignition control device |
| CN113686214B (en) * | 2021-08-19 | 2023-07-21 | 融硅思创(北京)科技有限公司 | No ignition charge digital electronic detonator based on semiconductor bridge |
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| FR2790078B1 (en) * | 1999-02-18 | 2004-11-26 | Livbag Snc | ELECTROPYROTECHNIC IGNITER WITH ENHANCED IGNITION SAFETY |
| CN202092526U (en) * | 2010-11-25 | 2011-12-28 | 陕西应用物理化学研究所 | Novel delay detonator controlled by digital electronic component |
| CN102519321B (en) * | 2011-12-23 | 2016-01-20 | 融硅思创(北京)科技有限公司 | A kind of digital electric detonator bridge wire bond connected components |
| CN202470918U (en) * | 2012-02-20 | 2012-10-03 | 秦志春 | Electromagnetic reinforcement semiconductor bridge detonator |
| CN103033100B (en) * | 2012-12-13 | 2015-09-16 | 北京全安密灵科技股份公司 | A kind of electrostatic prevention structure of electric detonator |
| CN204461251U (en) * | 2014-11-18 | 2015-07-08 | 北京理工大学 | The high-effect electrostatic defending assembly of a kind of bridge-wire electric detonator wafer-type TVS pipe |
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