CN104315931A - Piezoresistance type efficient electrostatic protection bridge-wire electric detonator - Google Patents
Piezoresistance type efficient electrostatic protection bridge-wire electric detonator Download PDFInfo
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- CN104315931A CN104315931A CN201410658838.XA CN201410658838A CN104315931A CN 104315931 A CN104315931 A CN 104315931A CN 201410658838 A CN201410658838 A CN 201410658838A CN 104315931 A CN104315931 A CN 104315931A
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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 high-effect electrostatic defending technology of electric cap of anti-extreme static electricity on human body's environment.
Background technology
Electric cap is the important detonation element that in engineering explosion, destructor is ignited or weapons and ammunitions explosive train is ignited, and in electric cap, conventional scorching hot bridge silk element is as electric transducer element.Bridge wire bond is connected between electric cap two plain conductor ends, when passing into firing current, bridge silk realizes the electric heating conversion of electric initiating control signal (firing current), bridge silk heat-dissipating produces high temperature, ignite the ignition medicine contacted with it, send out order after pyrophoric ignition to ignite delay powder, priming, high explosive, complete the function of the detonating of electric cap, delays time to control and output shock wave.
Existing bridge-wire electric detonator be in use easily subject to electrostatic, radio frequency, stray electrical current impact and meet accident ignition or performance degradation.In the process such as production, assembling, storage, transport, operation and maintenance of electric spark workpiece and destructor, the harm ubiquity of static discharge is the modal dangerous matter sources causing 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 impact the ignition quality of electric spark workpiece (sensitivity, action time etc.) and security performance (safe current, dielectric strength etc.), even cause misfire or accidental ignition, system task cannot be completed or cause casualties.ESD test proves, even insensitiveness electric spark workpiece also may produce damage or get angry when standing 25kV electrostatic impact, those sensitive electrical priming systems are then faced with severeer electrostatic and threaten.
The existing electrostatic defending technological approaches of electric cap has, adopt between pin-shell and insulating materials is set to improve its dielectric strength, thus raising electrostatic breakdown voltage, or the electrostatic leakage passage such as air-gap, painting conducting resinl is set between pin-shell to improve the antistatic capacity of pin-shell; And the raising of the antistatic effect of pin-pin only has technical measures such as increasing bridge filament diameter, increase bridging plug contact area, raising ignition medicine bursting point at present.By one of above electrostatic defending technological approaches or combination, thus electric cap is made to reach the security requirement of the human body electrostatic 25kV that the standard such as 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 " specifies.But along with the electrostatic environment in industrial application occasion and battlefield, the enhancing day by day of electromagnetic environment interference, along with people improve the understanding of electrostatic interaction mechanism, it is found that the safety indexes of the maximum static electricity on human body's voltage (military electric spark workpiece be 25kV, civilian electric cap be 10kV) formulated in traditional industrial standard and military standard can not cover, meet the environment for use requirement of modern priming system completely, static electricity on human body's environment the harshest can not be represented.As Ordnance Engineering College Liu Shang closes the extreme body voltages Data-Statistics result of academician and U.S. Sang Diya laboratory, IEEE-USA's report, wherein " Britain's antistatic general specification " is 50kV, " U.S.'s protection test handbook " is 40kV, " the international electrostatic meeting in Beijing " is 35kV ~ 50kV, and Ordnance Engineering College's result of study is 60kV.And the analysis of electric spark workpiece safety testing and theory analysis rarely have report under these stationary electrode end value effects.In addition, electric spark workpiece is inevitably subject to repeatedly electrostatic impact in the middle of the processes such as use, transport, be reported in the mode being coated with conducting resinl between pin-shell at present to carry out protection base-shell electrostatic hazard and can reach antistatic 25kV, but after high-pressure electrostatic effect 3 times, the protection effect of conducting resinl can reduce greatly, and multiple discharge even can cause conducting resinl to lose antistatic capacity.Therefore this just requires to find and a kind ofly can protect higher electrostatic potential, is subject to the technical scheme that repeatedly electrostatic impact rear protecting effect is constant, particularly can realize the microminiaturized protective device protected to sensitive electrical priming system pin-pin loop.
Electrostatic prevention structure disclosed in Chinese patent CN201210540239.9 is at detonator rear end extrapolation transverse discharge metal connecting piece, and size is comparatively large, inapplicable long payment to a porter or small size detonator.Adopt crimping mode to be connected between metal connecting piece with detonator payment to a porter, easily cause electrode delamination and protection circuit open circuit, electrostatic discharge protective circuit was lost efficacy.Outside plug type discharge metal connector promotes the manufacturing process difficulty of detonator, if easily cause accidental ignition in the shaping rear extrapolation of detonator and cause danger, and in the shaping front extrapolation of detonator, very large inconvenience and trouble are brought for the manufacturing process of detonator, extrapolation transverse discharge metal connecting piece brings restriction can to the use of detonator simultaneously, when guided missile high overload, the horizontal large circuit board of extrapolation is easy to come off to System's composition danger, and when not having unnecessary usage space, the horizontal large circuit board of extrapolation will bring danger to whole system.And this patent does not illustrate the protection effect of electrostatic.
Electrostatic prevention structure disclosed in Chinese patent CN201220055188.6 is only in semiconductor bridge detonator, and only select 1 corner discharge when protection base-shell electrostatic, because product can discharge to product through at least 3 to 5 person-times in transport, assembling process, once may cause fusing distortion to sawtooth after electric discharge, thus losing electrostatic defending effect, multiple discharge can be caused danger after impacting; Described patent does not provide protection effect simultaneously, does not also propose to carry out anti-repeatedly electrostatic impact, does not more propose the size of product size.
Summary of the invention
In order to anti-higher than 25kV electrostatic potential and repeatedly electrostatic impact, patent of the present invention provides a kind of bridge-wire electric detonator scheme of antistatic environment, it not only can effective protection base-shell high voltage electrostatic discharge, and can also protect pin-pin high voltage electrostatic discharge, repeatedly electrostatic impact can also be stood simultaneously.
Patent of the present invention solves the technical scheme that its technical problem adopts:
Place a wafer-type high-effect electrostatic antistatic assembly at double-legged line electric cap input, can form pin-pin and the high-effect electrostatic leakage passage of pin-shell simultaneously, electrostatic defending electric cap still can keep the ignition quality of former common electric cap and power of detonating.
The bridge-wire electric detonator composition of antistatic environment comprises electrode plug, bridge silk, ignition medicine, priming, high explosive, strengthening cap, capsule, the efficient antistatic assembly of disc.Described high-effect electrostatic defending assembly connects and composes pin-pin electrostatic leakage passage by disc electrostatic defending PCB and electric cap both feet line circuit, connects and composes pin-shell electrostatic leakage passage with shell circuit.High-effect electrostatic defending assembly of the present invention, not only has pin-pin electrostatic protection device and pin-shell electrostatic protection device, and the pin-shell electrostatic leakage passage also having multiple wedge angle air-gap to form, namely forms pin-shell electrostatic defending dual fail-safe leakage path.Protection electrostatic component of the present invention adopts during piezo-resistance can realize pin-anti-50kV of shell electrostatic protection effect, no matter pin-anti-30kV of pin electrostatic protection effect is in pin-shell protection or can both stand the repeat impact of static discharge and any performance change can not occur on pin-foot protection.
The scheme of high-effect electrostatic defending assembly is: (1) adopts piezo-resistance, show that pin-shell protection effect can reach human body electrostatic 50kV by experiment, (2) disc electrostatic defending PCB utilizes zigzag copper-clad plate (sawtooth wedge angle 60 degree in addition, because product is in transport, to discharge to product through 3 to 5 people in assembling process, once may there is fusing distortion to sawtooth after electric discharge, thus it is ineffective, therefore design many zigzag, sawtooth number is 5 ~ 8) design make the air-gap forming multiple accurate controlled discharge channel shape and gap size between pin-shell, show that pin-shell protection effect can reach human body electrostatic 50kV by test, require to be doubled than 25kV safety indexes anti-in GJB5309.14, (3) when adopting piezo-resistance protective device, show that pin-foot protection effect can reach human body electrostatic 30kV by test, this is that forefathers did not have, (4) no matter be in pin-shell protection because the operating characteristic of piezo-resistance determines or the repeat impact of static discharge can both be stood and any performance change can not occur on pin-foot protection.
The invention has the beneficial effects as follows: protection electrostatic component of the present invention adopts during piezo-resistance can realize pin-anti-50kV of shell electrostatic protection effect, no matter pin-anti-30kV of pin electrostatic protection effect is in pin-shell protection or can both stand the repeat impact of static discharge and any performance change can not occur on pin-foot protection.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
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 that the high-effect electrostatic defending assembly of wafer-type piezoresistive and electrode plug assemble schematic diagram.
Fig. 4 is that the high-effect electrostatic defending assembly of wafer-type piezoresistive and electric cap assemble schematic diagram.
Detailed description of the invention
Composition graphs 3, Fig. 4, the bridge-wire electric detonator of the antistatic environment of patent of the present invention comprises band XXX type piezo-resistance 3, 5, disc electrostatic defending PCB, electrode plug 8, bridge silk, ignition medicine, priming, export medicine, shell 11, the zigzag discharge electrode 6 of piezo-resistance guard assembly will have been welded, 7 sides contact with the bottom (the other side of welded bridge silk) of electrode plug, by metallization via hole 2, 3 through payment to a porter 14, form circuit after 15 to connect, circuit connects employing Reflow Soldering, manual soldering or painting conducting resinl, skim air-gap can be formed because discharge electrode exceeds pcb board become static discharge gap between discharge electrode and housing 16, metallization via hole 2, 4 with payment to a porter 9, the good electrode plug assembly formed with piezo-resistance electrostatic protection device of 10 welding, then electric cap is formed according to electric cap manufacture craft, capsule closing in back casing 11 and arc pad 1 is connected and realizes structure and is combined and connects with circuit.In pin-shell electrostatic defending, existing piezo-resistance has again air-gap leakage path, protects in protection base-pin electrostatic by piezo-resistance.No matter operating characteristic due to XXX type piezo-resistance is protect at pin-shell or can both stand the repeat impact of static discharge and any performance change can not occur on pin-foot protection if determining.
For the needs of Bridgewire EED pin pin electrostatic discharge protective, following several respects content in the type selecting of piezo-resistance, should be considered:
1. pressure sensitive voltage, i.e. breakdown voltage or threshold voltage.It is greater than the normal working voltage of electric cap, affects performance when preventing priming system from normally working due to piezo-resistance shunting.
2. clamping voltage Vc refers to the maximum voltage value that piezoresistor two ends can bear, and it is less than the static damage voltage of electric cap, this makes it possible to effectively protect electric cap.
3. discharge capacity, namely the peak value of maximum surge current is environment temperature is in 25 DEG C of situations, for the impulse current waveform of regulation and the dash current number of times of regulation, the change of pressure sensitive voltage is no more than ± 10% time maximum surge current value.
4. rated power, consumable peak power under the environment temperature of regulation.It is greater than the peak power of electrostatic interaction, otherwise piezo-resistance will be damaged, and can not play protective action or reuse.
5. the response time is exactly the time that piezo-resistance voltage reaches that pressure sensitive voltage starts to playing a protective role, and it must be 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 safe current is 50mA, belong to responsive type electric spark workpiece, ignition operating voltage 12V (6.8 μ F), the energy acting on priming system when can calculate normal work is 4.9 × 10
-4j; The critical firing voltage 18.45kV of pin pin electrostatic, can obtain that electric spark workpiece operating voltage is maximum can not more than 22V, peak power 88.6W.
(1) according to product specification, sample normal working voltage is 12V (6.8 μ F), then the reliable firing voltage of this priming system is 12V;
(2) show that the critical firing voltage of sample electrostatic environment is 18.45kV according to the test of product electrostatic, the voltage that can be calculated the loading of priming system two ends is 22V, and security consideration nargin is 1.3, then the maximum voltage of misfiring of this priming system electrostatic is 15.5V;
(3) security reliability of the selection combination product of protective device determines the parameter choose of protective device, and therefore choosing piezo-resistance pressure sensitive voltage should between 12V ~ 15.5V;
(4) clamping voltage is selected to be less than the maximum voltage 15.5V that misfires of priming system electrostatic;
(5) current waveform specified should be consistent with Electrostatic discharge waveforms, and the dash current number of times of regulation 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 nanosecond, and therefore the response time of protective device must be less than nanosecond (10
-9s);
(7) according to the mono-RC model of the electrostatic discharge environments 50kV of the limit (series connection 5k Ω), rated output is 598.56W.
Therefore TG0402ML240K type piezo-resistance chosen by this sample, can meet the designing requirement of pressure sensitive voltage.
It should be noted that; the foregoing is only preferred embodiment of the present invention; not thereby limit scope of patent protection of the present invention, the present invention can also carry out the improvement of materials and structures to the structure of above-mentioned various parts, or adopts technically equivalent ones to replace.Therefore the equivalent structure change that all utilizations description of the present invention and diagramatic content are done, or directly or indirectly apply to other correlative technology fields and be all in like manner all contained in the scope that the present invention contains.
Claims (7)
1. the high-effect electrostatic defending bridge-wire electric detonator of piezoresistive, comprise a common electric cap and a high-effect electrostatic defending assembly of wafer-type piezoresistive, it is characterized in that: the high-effect electrostatic defending assembly of wafer-type piezoresistive is assemblied in electric cap electrode plug end by metallization via hole through payment to a porter, guard assembly and electric cap form pin-pin and the high-effect electrostatic leakage passage of pin-shell simultaneously, and electrostatic defending electric cap still can keep the ignition quality of former common electric cap and power of detonating.
2. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, it is characterized in that electric cap inner body assembly structure order is oral area fluid sealant, wafer-type high-effect electrostatic defending assembly, strengthening cap, double-legged line electrode plug, electric heating bridge silk, ignition medicine, priming, high explosive, capsule, namely high-effect electrostatic defending component assembling does not change the assemble sequence of former electric cap inner body.
3. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, it is characterized in that high-effect antistatic assembly is connected and anatomical connectivity with electric cap realizing circuit through payment to a porter by metallization via hole, high-effect electrostatic protection device adopts piezo-resistance, can reach extreme static electricity on human body's security requirement of anti-50kV and anti-repeatedly electrostatic impact to the antistatic capacity in responsive type pin-shell ignition loop.
4. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, it is characterized in that high-effect electrostatic protection device adopts piezo-resistance, anti-30kV can be reached, static electricity on human body's security requirement of at least anti-25kV that antistatic technology index specifies higher than existing electric cap electrostatic safety national standard and GJB to the antistatic capacity in responsive type pin-human hair combing waste fire loop.
5. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, it is characterized in that wafer-type high-effect electrostatic defending assembly is made up of a disc electrostatic defending PCB and at least one high-effect electrostatic protection device, then there is when protective device is in parallel with bridge wire resistance pin-pin antistatic capacity, when protective device is in parallel with pin-shell gap, then there is pin-shell antistatic capacity, when use two high-effect electrostatic protection devices, protective device can have pin-pin and pin-shell antistatic capacity simultaneously.
6. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that the height of wafer-type piezo-resistance electrostatic defending assembly only has 0.8mm ~ 1.5mm, very little on former electric cap height impact.
7. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that the loading of high-effect electrostatic defending assembly does not affect the ignition quality such as firing voltage, firing current of former electric cap and exports power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410658838.XA CN104315931B (en) | 2014-11-18 | 2014-11-18 | Piezoresistance type electrostatic protection bridge-wire electric detonator |
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| CN201410658838.XA CN104315931B (en) | 2014-11-18 | 2014-11-18 | Piezoresistance type electrostatic protection bridge-wire electric detonator |
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| CN104315931A true CN104315931A (en) | 2015-01-28 |
| CN104315931B CN104315931B (en) | 2017-02-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729670A (en) * | 2017-10-27 | 2018-02-23 | 北京理工大学 | Design micro- plane formula electric firing component parameter design method under firing voltage |
| CN107809898A (en) * | 2017-11-29 | 2018-03-16 | 四川蓝狮科技有限公司 | A kind of electric spark workpiece anti-static mechanism |
| CN108238582A (en) * | 2018-01-10 | 2018-07-03 | 北京理工大学 | A kind of minute yardstick MEMS energy applied to fuse dredges device and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586435A (en) * | 1983-05-03 | 1986-05-06 | Johannesburg Construction Corporation (Pty) Ltd. | 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 |
| FR2911675A1 (en) * | 2007-01-19 | 2008-07-25 | 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 |
| CN103033100A (en) * | 2012-12-13 | 2013-04-10 | 北京全安密灵科技股份公司 | Anti-static structure of electronic detonator |
-
2014
- 2014-11-18 CN CN201410658838.XA patent/CN104315931B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586435A (en) * | 1983-05-03 | 1986-05-06 | Johannesburg Construction Corporation (Pty) Ltd. | 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 |
| FR2911675A1 (en) * | 2007-01-19 | 2008-07-25 | 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 |
| CN103033100A (en) * | 2012-12-13 | 2013-04-10 | 北京全安密灵科技股份公司 | Anti-static structure of electronic detonator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729670A (en) * | 2017-10-27 | 2018-02-23 | 北京理工大学 | Design micro- plane formula electric firing component parameter design method under firing voltage |
| CN107809898A (en) * | 2017-11-29 | 2018-03-16 | 四川蓝狮科技有限公司 | A kind of electric spark workpiece anti-static mechanism |
| CN108238582A (en) * | 2018-01-10 | 2018-07-03 | 北京理工大学 | A kind of minute yardstick MEMS energy applied to fuse dredges device and preparation method thereof |
| 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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| CN104315931B (en) | 2017-02-22 |
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