CN104315931B - Piezoresistance type electrostatic protection bridge-wire electric detonator - Google Patents
Piezoresistance type electrostatic protection bridge-wire electric detonator Download PDFInfo
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- CN104315931B CN104315931B CN201410658838.XA CN201410658838A CN104315931B CN 104315931 B CN104315931 B CN 104315931B CN 201410658838 A CN201410658838 A CN 201410658838A CN 104315931 B CN104315931 B CN 104315931B
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Abstract
The invention relates to a piezoresistance type efficient electrostatic protection bridge-wire electric detonator. The bridge-wire electric detonator comprises electrode plugs, bridge wires, ignition powder, detonating powder, high explosive, a reinforcing cap, a detonator shell and a wafer-shaped efficient antistatic protection assembly. The efficient antistatic protection assembly is connected with a detonator double-pin wire circuit through a wafer-shaped electrostatic protection PCB to form a pin-pin electrostatic discharge channel and connected with a shell circuit to form a pin-shell electrostatic discharge channel. The efficient electrostatic protection assembly is provided with a pin-pin electrostatic protection device and a pin-shell electrostatic protection device and further provided with a pin-shell electrostatic discharge channel, namely a pin-shell electrostatic protection dual-guarantee discharge channel, composed of a plurality of sharp-angled air gaps. When piezoresistors are adopted for the electrostatic protection assembly, the pin-shell electrostatic protection effect of resisting 50 kV can be achieved, the pin-pin electrostatic protection effect of resisting 30 kV can be achieved, and repeated impact by electrostatic discharge can be borne by both pin-shell protection and pin-pin protection without any change in performance.
Description
Art
Patent of the present invention belongs to electric cap guard technology, particularly a kind of electric cap electrostatic resisting extreme static electricity on human body's environment
Guard technology.
Background technology
Electric cap is the important detonation element that in engineering explosion, destructor is ignited or weapons and ammunitions explosive train is ignited, electricity
Scorching hot bridge silk element is commonly used as electric transducer element in detonator.Bridge wire bond is connected between two plain conductor ends of electric cap,
When being passed through firing current, the electric heating conversion of electric initiating control signal (firing current) realized by bridge silk, and bridge silk heat produces high temperature,
Ignite the igniting gunpowder contacting, and sequentially ignite after igniting gunpowder igniting delay powder, priming, high explosive, completes rising of electric cap
Quick-fried, delays time to control and the function of output shock wave.
Existing bridge-wire electric detonator is easily affected and is anticipated by electrostatic, radio frequency, stray electrical current in use
Outer ignition or performance degradation.In processes such as the production of electric spark workpiece and destructor, assembling, storage, transport, operation and maintenances
In, the harm generally existing of static discharge, is the modal dangerous matter sources leading to electric spark workpiece accidental ignition.Static discharge has
High voltage, the feature of low-yield, high transient state, the coupling of electrostatic discharge energies may be to ignition quality (sensitivity, the work of electric spark workpiece
With time etc.) and security performance (safe current, dielectric strength etc.) impact, even result in misfire or accidental ignition, make
System task cannot complete or cause casualties.ESD test proves, even insensitiveness electric spark workpiece is standing 25kV
It is likely to during electrostatic impact to produce damage or gets angry, those sensitive electric spark workpieces are then faced with more acute electrostatic and threaten.
Electric cap existing electrostatic defending technological approaches have, and adopt setting insulant between foot-shell to insulate to improve it
Intensity, thus improving electrostatic breakdown voltage, or arranges air-gap, applies the electrostatic leakage passages such as conducting resinl to improve between foot-shell
The antistatic capacity of foot-shell；And the raising of the antistatic effect of foot-foot only increases bridge wire diameter at present, increase bridging plug connects
Contacting surface is amassed, is improved the technical measures such as igniting gunpowder bursting point.By one of above electrostatic defending technological approaches or combination, so that electric
Detonator reaches GJB5309.14-2004《Priming system test method the 14th part：ESD test》、MIL-DTL-23659F-
2010《Electric initiator universal design specification》、GBT8031-2005《Commercial electric detonator》The human body electrostatic 25kV specifying etc. standard
Security requirement.But it is as the electrostatic environment in industrial application occasion and battlefield, the increasingly enhancing of electromagnetic environment interference, with
People improve the maximum human body it has been found that formulating in traditional industrial standard and military standard to the understanding of electrostatic interaction mechanism
The safety indexes of electrostatic potential (military electric spark workpiece is 25kV, civilian electric cap is 10kV) can not be completely covered, completely
The foot modern times use environment of priming system requires, nor represents static electricity on human body's environment the harshest.As Ordnance Engineering College Liu
Still close academician and the extreme body voltages Data-Statistics knot of U.S.'s Sang Diya laboratory, IEEE-USA's report
Really, wherein《Britain's antistatic general specification》For 50kV,《U.S.'s protection test handbook》For 40kV,《Beijing world electrostatic meeting》
For 35kV～50kV, Ordnance Engineering College's result of study is 60kV.And these electrostatic extremums effect under electric spark workpiece safety
Property analysis of experiments and theory analysis are rarely reported.Additionally, electric spark workpiece is inevitably subject in the middle of the processes such as use, transport
To multiple electrostatic impact, be reported at present apply between foot-shell conducting resinl mode come protection base-shell electrostatic hazard can reach anti-
Electrostatic 25kV, but after high-pressure electrostatic acts on 3 times, the protection effect of conducting resinl can substantially reduce, and multiple discharge results even in
Conducting resinl loses antistatic capacity.Therefore this requires that finding one kind can protect higher electrostatic potential, be subject to multiple electrostatic
Impact rear protecting effect is constant, particularly sensitive electric spark workpiece foot-foot loop is capable of with protection miniaturization protective device
Technical 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, inapplicable long payment to a porter or small size detonator.Adopt between metal connecting piece and detonator wire and crimp
Mode connects, and easily causes electrode delamination and protection circuit open circuit, so that electrostatic discharge protective circuit was lost efficacy.Outside plug type discharge metal connects
Part lifts the manufacturing process difficulty of detonator, if extrapolation easily causes accidental ignition and causes danger after detonator molding, and in detonator
Before molding, extrapolation brings very big inconvenience and trouble for the manufacturing process of detonator, simultaneously the meeting of extrapolation transverse discharge metal connecting piece
Bring restriction to the use of detonator, the horizontal large circuit board of extrapolation is easy to come off and system is constituted in the case of guided missile high overload
Danger, do not have unnecessary using space when the horizontal large circuit board of extrapolation will bring danger to whole system.And this 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
1 corner discharge is only selected, because product can be through at least 3 to 5 person-times in transport, assembling process during protection base-shell electrostatic
Product is discharged, after once discharging, sawtooth is likely to result in fusing deformation, thus losing electrostatic defending effect, multiple discharge
Can cause danger after impact；Described patent does not provide protection effect simultaneously, does not propose can carry out resisting multiple electrostatic yet
Impact, does not more propose the size of product size.
Content of the invention
In order to anti-higher than 25kV electrostatic potential and multiple electrostatic impact, patent of the present invention provides a kind of antistatic environment
Bridge-wire electric detonator scheme, it not only can effective protection base-shell high voltage electrostatic discharge, and can also be to foot-foot high-pressure electrostatic
Electric discharge is protected, and can also stand multiple electrostatic impact simultaneously.
Patent of the present invention solves its technical problem and be employed technical scheme comprise that：
Place the high-effect electrostatic antistatic assembly of wafer-type in double-legged line electric cap input, can simultaneously constitute foot-
Foot and foot-shell high-effect electrostatic leakage passage, electrostatic defending electric cap remains to keep the ignition quality of former common electric cap and rises
Quick-fried power.
The bridge-wire electric detonator composition of antistatic environment includes electrode plug, bridge silk, igniting gunpowder, priming, high explosive, reinforcement
Cap, capsule, disc efficient antistatic assembly.Described high-effect electrostatic defending assembly passes through disc electrostatic defending PCB electricity
Road plate connects and composes foot-foot electrostatic leakage passage with electric cap both feet line circuit, connects and composes foot-shell electrostatic with shell circuit and lets out
Put passage.The high-effect electrostatic defending assembly of the present invention, not only foot-foot electrostatic protection device and foot-shell electrostatic protection device,
Also have foot-shell electrostatic leakage passage that multiple wedge angle air-gaps are constituted, that is, constitute foot-shell electrostatic defending dual fail-safe leakage path.
The protection electrostatic component of the present invention adopts and can achieve foot-anti-50kV of shell electrostatic protection effect, foot-foot electrostatic defending during varistor
The anti-30kV of effect, no matter be in foot-shell protection or the repeat impact that can stand static discharge on foot-foot protection not
Any performance change can occur.
The scheme of high-effect electrostatic defending assembly is：(1) adopt varistor, foot-shell protection is drawn by experiment
Effect has been able to reach human body electrostatic 50kV；(2) disc electrostatic defending PCB utilizes zigzag copper-clad plate in addition
(60 degree of sawtooth wedge angle, because product will discharge to product through 3 to 5 people in transport, assembling process, after once discharging
To sawtooth it may happen that fusing deformation, thus ineffective, therefore design many zigzag, sawtooth number is 5～8) design make
Form the air-gap of multiple precise control discharge channel shapes and gap size between foot-shell, foot-shell protection is drawn by test
Effect has been able to reach human body electrostatic 50kV, requires to be doubled than 25kV safety indexes anti-in GJB5309.14；
(3) when using varistor protective device, show that foot-foot protection effect can reach human body electrostatic 30kV by test,
This is that forefathers were not had；(4) no matter due to the operating characteristic of varistor determine be the protection of foot-shell or foot-
Without there is any performance change in the repeat impact that can stand static discharge on foot protection.
The invention has the beneficial effects as follows：The protection electrostatic component of the present invention adopts and can achieve foot-shell electrostatic during varistor
The anti-50kV of protection effect, the foot-anti-30kV of foot electrostatic protection effect, no matter be in foot-shell protection or can on foot-foot protection
Without there is any performance change in the repeat impact enough standing static discharge.
The invention will be further described with reference to the accompanying drawings and examples.
Brief description
Fig. 1 is wafer-type piezoresistive high-effect electrostatic defending assembly front.
Fig. 2 is wafer-type piezoresistive high-effect electrostatic defending assembly reverse side.
Fig. 3 is wafer-type piezoresistive high-effect electrostatic defending assembly and electrode plug assembling schematic diagram.
Fig. 4 is wafer-type piezoresistive high-effect electrostatic defending assembly and electric cap assembling schematic diagram.
Specific embodiment
In conjunction with Fig. 3, Fig. 4, the bridge-wire electric detonator of patent antistatic environment of the present invention include carrying XXX type varistor 3,5,
Disc electrostatic defending PCB, electrode plug 8, bridge silk, igniting gunpowder, priming, output medicine, shell 11, will be welded pressure-sensitive
The zigzag discharge electrode 6 of resistance guard assembly, 7 sides are contacted with the bottom (other side of welded bridge silk) of electrode plug, pass through
Metallization via 2,3 forms circuit after passing through payment to a porter 9,10 and connects, and circuit is connected by Reflow Soldering, manual soldering or applies conductive
Glue, can form a thin layer air-gap between discharge electrode and shell 11 because discharge electrode exceeds pcb board become static discharge gap,
Metallization via 2,4 and payment to a porter 9,10 are welded the electrode plug assembly being formed with varistor electrostatic protection device, then press
Form electric cap according to electric cap processing technology, after capsule closes up, shell 11 realize structure connected with arc pad 1 is combined and electricity
Road connects.In terms of foot-shell electrostatic defending, existing varistor has air-gap leakage path again, in terms of protection base-foot electrostatic
Protected with varistor.No matter being in foot-shell protection or in foot-foot because the operating characteristic of XXX type varistor determines
Without there is any performance change in the repeat impact that can stand static discharge in protection.
For the needs of Bridgewire EED foot foot electrostatic discharge protective, it is considered as several as follows in the type selecting of varistor
Aspect content：
1. pressure sensitive voltage, i.e. breakdown voltage or threshold voltage.It is greater than the normal working voltage of electric cap, prevents firer
Performance is affected because varistor shunts during product normal work.
2. clamp voltage Vc refers to the maximum voltage value that piezoresistor two ends can bear, and it is less than the quiet of electric cap
Electrical lesion voltage, this makes it possible to be effectively protected electric cap.
3. discharge capacity, that is, the peak value of maximum surge current is in the case of ambient temperature is 25 DEG C, for the impact of regulation
For the dash current number of times of current waveform and regulation, the change of pressure sensitive voltage is less than maximum surge current when ± 10%
Value.
4. rated power, the consumable peak power of institute under the ambient temperature of regulation.It is greater than the peak of electrostatic interaction
It is worth power, otherwise varistor will damage it is impossible to play protective action or reuse.
5. response time is exactly that varistor voltage reaches pressure sensitive voltage and starts to the time playing a protective role, and it is necessary
It is less than the time of static discharge.
The electrode plug size Φ 3.45 × 3mm of sample, bridge silk is 10 μm of PtW alloys, product resistance 3～9 Ω, its safety electricity
Flow for 50mA, belong to responsive type electric spark workpiece, ignition running voltage 12V (6.8 μ F), act on when can calculate normal work
The energy of priming system is 4.9 × 10-4J；Foot foot electrostatic critical firing voltage 18.45kV, can obtain electric spark workpiece running voltage maximum
Not can exceed that 22V, peak power 88.6W.
(1) according to product specification, sample normal working voltage is 12V (6.8 μ F), then this priming system reliability firing voltage is
12V；
(2) show that the critical firing voltage of sample electrostatic environment is 18.45kV according to the test of product electrostatic, can be calculated firer
The voltage that product two ends load is 22V, 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 bonded products of protective device is chosen come the parameter to determine protective device, therefore selects
Pressure quick resistive pressure-sensitive voltage should be between 12V～15.5V；
(4) clamp voltage selects to should be less than priming system electrostatic maximum to misfire voltage 15.5V；
(5) current waveform specifying should consistent with Electrostatic discharge waveforms it is stipulated that dash current number of times should be greater than 10 times；
(6) when can draw static discharge by old xerographic paper discharge current time waveform, the rise time is several receiving
Second, the response time of therefore protective device must be smaller than nanosecond (10-9s)；
(7) according to electrostatic discharge environments 50kV mono- RC model (series connection 5k Ω) of the limit, calculating power is 598.56W.
Therefore TG0402ML240K type varistor chosen by this sample, can meet the design requirement of pressure sensitive voltage.
It should be noted that the foregoing is only presently preferred embodiments of the present invention, not thereby limit the patent of the present invention
Protection domain, the present invention can also carry out the improvement of material and structure to the construction of above-mentioned various parts, or adopts skill
Art equivalent is replaced.Therefore the equivalent structure change that the description of all utilization present invention and diagramatic content are made, or directly or
Indirectly apply to other correlative technology fields and be all contained in the range of the present invention covered in the same manner.
Claims (6)
1. a kind of piezoresistive electrostatic defending bridge-wire electric detonator, including a common electric cap and the pressure-sensitive electricity of wafer-type
Resistance type electrostatic defending assembly, is characterized in that：Wafer-type piezoresistive electrostatic defending assembly passes through to metallize via through payment to a porter
It is assemblied in electric cap electrode plug end, guard assembly and electric cap simultaneously constitute foot-foot and foot-shell electrostatic leakage passage, make foot-foot
Antistatic capacity reaches anti-30kV, and foot-shell antistatic capacity reaches anti-50kV, and electrostatic defending electric cap remains to keep former general
The ignition quality of energising detonator and detonating power.
2. electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that electric cap inner body assembling structure
It is sequentially oral area fluid sealant, wafer-type electrostatic defending assembly, strengthening cap, double-legged line electrode plug, electric heating bridge silk, igniting gunpowder, detonating
Medicine, high explosive, capsule, i.e. electrostatic defending assembly assembling does not change the assemble sequence of former electric cap inner body.
3. electrostatic defending bridge-wire electric detonator according to claim 1 is it is characterised in that antistatic assembly passes through metallization
Via is realized circuit through payment to a porter and electric cap and is connected and structure connection, and electrostatic protection device adopts varistor, to responsive type
The antistatic capacity in foot-shell ignition loop can resist extreme static electricity on human body's security requirement of multiple electrostatic impact.
4. electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that electrostatic protection device adopts pressure-sensitive electricity
Resistance, the antistatic technology index to responsive type foot-human hair combing waste fire loop is higher than existing electric cap electrostatic safety national standard and country
Static electricity on human body's security requirement of at least anti-25kV of military standard regulation.
5. electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that wafer-type electrostatic defending assembly by one
Individual disc electrostatic defending PCB and at least one electrostatic protection device form, when protective device is in parallel with bridge wire resistance
Shi Ze has foot-foot antistatic capacity, then has foot-shell antistatic capacity when protective device is in parallel with foot-shell gap,
When using two electrostatic protection devices, protective device can have foot-foot and foot-shell antistatic capacity simultaneously.
6. electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that the loading of electrostatic defending assembly not
Affect firing voltage, firing current, ignition quality and the output power of former electric cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658838.XA CN104315931B (en) | 2014-11-18 | 2014-11-18 | Piezoresistance type electrostatic protection bridge-wire electric detonator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658838.XA CN104315931B (en) | 2014-11-18 | 2014-11-18 | Piezoresistance type electrostatic protection bridge-wire electric detonator |
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| CN104315931B true CN104315931B (en) | 2017-02-22 |
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| CN107729670B (en) * | 2017-10-27 | 2021-05-14 | 北京理工大学 | Method for designing parameters of micro-planar electric ignition assembly under designed ignition voltage |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ZW7184A1 (en) * | 1983-05-03 | 1985-01-30 | Johannesburg Constr | An electric detonator |
| US6789483B1 (en) * | 2003-07-15 | 2004-09-14 | Special Devices, Inc. | Detonator utilizing selection of logger mode or blaster mode based on sensed voltages |
| FR2911675B1 (en) * | 2007-01-19 | 2009-08-21 | Schneider Electric Ind Sas | ELECTRO-PYROTECHNIC INITIATOR WITH MAGNETIC CONTROL |
| 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 |
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