CN109103676B - Non-shearing stranded wire electric connection plug-in based on electromagnetic induction and method thereof - Google Patents
Non-shearing stranded wire electric connection plug-in based on electromagnetic induction and method thereof Download PDFInfo
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- CN109103676B CN109103676B CN201811136508.9A CN201811136508A CN109103676B CN 109103676 B CN109103676 B CN 109103676B CN 201811136508 A CN201811136508 A CN 201811136508A CN 109103676 B CN109103676 B CN 109103676B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/18—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing bases or cases for contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Air Bags (AREA)
Abstract
The invention discloses an electromagnetic induction-based non-shearing stranded wire electrical connection plug-in and a method thereof. The invention adopts the inductance coils, and the data line of the main control system passes through the central axis of the corresponding inductance coil and returns to the main control system to form a complete control loop; the inductance coil is connected to the corresponding electronic detonator through the inductance coil control line interface by the data line; the main control system sends signals, currents are generated in each data line, the currents flow through the central axis of the induction coil, the induction coil induces the currents, and accordingly energy and information are received and transmitted to the corresponding electronic detonator through the data lines; the invention fundamentally solves the unstable phenomena that the traditional connecting plug-in unit is easy to have the condition of loose sealing at the sealing cover and the electric connecting end is short-circuited in the severe environment after manual operation; and the structure size is small, the processing cost is low, the sealing performance is good, and the production is easy to realize.
Description
Technical Field
The invention relates to the field of electronic detonator testing, in particular to an electric connection plug-in of a non-shearing stranded wire based on electromagnetic induction and a method thereof.
Background
In the design and actual engineering application stage of the electronic detonator, in order to ensure safe and reliable detonation of the electronic detonator, the stranded wire type electric connection switch is widely applied, and in the traditional real-time operation process, when the multipoint electronic detonator is placed in a designated detonation range, after the electronic detonator is ready, the electrical interconnection between the total control end and each point detonation is realized by manually closing the stranded wire switch, and finally, the targeted detonation of each electronic detonator is realized. This mode of operation has been widely used in various military and civil explosive engineering applications, such as: fixed-point timing detonating to destroy targets, mine exploitation, tunnel excavation, building demolition and the like. However, in practical applications, there are many drawbacks to this manner of implementing electrical interconnection by artificial stranded wires: firstly, the manual operation adds unsafe and unreliable factors to the work, and often causes poor contact, thereby causing potential safety hazard to the whole construction environment; secondly, the stranded wire electrical connection mode is often sealed by adopting a detachable packaging shell, the detachable packaging shell is easy to have the condition of loose sealing at a sealing cover after manual operation, and the phenomenon of short circuit in the packaging shell is easy to occur in a thunder and rain day or in a humid environment, so that the engineering implementation reliability and safety are seriously influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the non-shearing stranded wire electric connection plug-in based on electromagnetic induction and the method thereof, and designs and realizes the design and the processing assembly of the non-stranded wire electric connection plug-in by analyzing the reasons of unreliable and unsafe initiation of single-point or multi-point electronic detonators.
An object of the present invention is to provide an electrical connector for non-shearing twisted wire based on electromagnetic induction.
The non-shearing stranded wire electric connection plug-in based on electromagnetic induction is arranged between a main control system and an electronic detonator.
The non-shearing stranded wire electric connection plug-in based on electromagnetic induction comprises: the electric connection plug-in unit comprises an encapsulation shell, a bracket, an inductance coil control line interface, a control end electric connection line input port and a control end electric connection line output port; wherein, one or more inductance coils are arranged on the bracket through a fixing piece; a bracket with one or more inductance coils is packaged in an electrical connection plug-in packaging shell; an inductance coil control line interface, a control end electrical connection line input port and a control end electrical connection line output port are respectively arranged on the electrical connection plug-in packaging shell, and the number of the inductance coil control line interfaces is consistent with that of the inductance coils; the control bus of the main control system is divided into a plurality of energy and information coupled data lines through the deconcentrator, each data line passes through the central shaft of a corresponding one of the induction coils through the input port of the electric connecting wire at the control end, and returns to the main control system from the output port of the electric connecting wire at the control end to form a complete control loop; each inductance coil corresponds to one electronic detonator, and each inductance coil is connected to the corresponding electronic detonator through a data line via an inductance coil control line interface; the main control system sends signals, currents are generated in the data lines, the currents flow through the central axes of the induction coils, the induction coils induce the currents, and accordingly energy and information are received and transmitted to corresponding electronic detonators through the data lines.
The electrical connection plug-in packaging shell adopts an anti-electromagnetic interference insulating material, such as polytetrafluoroethylene material, so as to realize insulation treatment with the surrounding environment. The edge of the electric connection plug-in packaging shell has no sharp angle and is a curved surface, and the assembly of the electric connection plug-in packaging shell with the inductance coil structure can be efficiently realized. In addition, the curved housing effectively dissipates the energy build-up generated by the tips within the structure.
The bracket is made of an anti-electromagnetic interference insulating material; corresponding to each inductance coil, the support is provided with one or more packaging cavities, the inner walls of the packaging cavities are matched with the outer edges of the inductance coils, the inductance coils are placed in the corresponding packaging cavities, the inductance coils are placed tangentially to the inner walls of the packaging cavities, the relative stability of the inside of the structure is ensured, and the phenomenon that energy is accumulated in sharp corners of the traditional rectangular entity is avoided.
The fixing piece adopts a fixing clamping ring, and the fixing clamping ring is positioned on the concentric line of the inductance coil and is tangent with the inner wall of the packaging cavity of the bracket.
The inductance coil is made of an antioxidant alloy material; the theoretical calculation shows that the section diameter of a single wire of the inductance coil is 0.5-2 mm, the coil number of the inductance coil is 5-15, the reliability of information receiving in electromagnetic environment can be ensured, the packaging volume can be reduced, and high-performance reliability can be realized.
Furthermore, the invention also comprises an electric connection plug-in unit fixing device, wherein the bottom of the electric connection plug-in unit packaging shell is provided with a plurality of installation jack holes, and the electric connection plug-in unit fixing device is used for fixedly installing the electric connection plug-in unit packaging shell through the installation jack holes, so that the safety and reliability of the non-shearing stranded wire electric connection plug-in unit under various application environments are realized.
The main control system sends signals including setting instructions and initiation control instructions.
The invention further aims to provide a preparation method of the non-shearing stranded wire electrical connection plug-in based on electromagnetic induction.
The invention discloses a preparation method of an electromagnetic induction-based non-shearing stranded wire electrical connection plug-in unit, which comprises the following steps:
1) Preparing an inductance coil:
preparing an induction coil by adopting an antioxidant alloy material, wherein the section diameter of a single wire of the induction coil is 0.5-2 mm, and the coil number of the induction coil is 5-15 circles;
2) Preparing a bracket:
an anti-electromagnetic interference insulating material is adopted and corresponds to each inductance coil to form one or more packaging cavities, and the inner wall of each packaging cavity is matched with the outer edge of each inductance coil;
3) And (3) installing an inductance coil:
placing one or more inductance coils in the corresponding packaging cavities, placing the inductance coils tangentially to the inner walls of the packaging cavities, and fixedly mounting the inductance coils on the inner walls of the brackets by adopting fixing pieces;
4) Preparing an electrical connection plug-in packaging shell:
preparing an electrical connection plug-in packaging shell with no sharp angle at the edge by adopting an anti-electromagnetic interference insulating material, respectively arranging an inductance coil control line interface, a control end electrical connection line input port and a control end electrical connection line output port on the electrical connection plug-in packaging shell, and arranging a plurality of installation jack holes at the bottom of the electrical connection plug-in packaging shell;
5) And (3) packaging:
encapsulating the bracket with the one or more inductor coils mounted therein within an electrical connection insert encapsulation housing;
6) And (3) electric connection:
the control bus of the main control system is divided into a plurality of data lines for energy and information coupling through the deconcentrator, each data line passes through the central shaft of a corresponding one of the induction coils through the input port of the electric connecting wire at the control end, and returns to the main control system from the output port of the electric connecting wire at the control end to form a complete control loop, and each induction coil is connected to a corresponding electronic detonator through the interface of the control wire of the induction coil through the data line;
7) Fixing:
the electric connection plug-in unit fixing device is used for fixing and installing the electric connection plug-in unit packaging shell through the installation jack.
The invention has the advantages that:
the invention adopts the inductance coil, the data line of the main control system passes through the central axis of the corresponding inductance coil through the input port of the electrical connection wire of the control end, and returns to the main control system from the output port of the electrical connection wire of the control end, thus forming a complete control loop; the inductance coil is connected to the corresponding electronic detonator through the inductance coil control line interface by the data line; the main control system sends signals, currents are generated in each data line, the currents flow through the central axis of the induction coil, the induction coil induces the currents, and accordingly energy and information are received and transmitted to the corresponding electronic detonator through the data lines; the invention fundamentally solves the unstable phenomena that the traditional connecting plug-in unit is easy to have the condition of loose sealing at the sealing cover and the electric connecting end is short-circuited in the severe environment after manual operation; and the structure size is small, the processing cost is low, the sealing performance is good, and the production is easy to realize.
Drawings
FIG. 1 is an internal schematic view of one embodiment of an electromagnetic induction based non-shear stranded wire electrical connection insert of the present invention;
FIG. 2 is a schematic illustration of the encapsulation of one embodiment of an electromagnetic induction based non-shear stranded wire electrical connection insert of the present invention;
fig. 3 is a schematic diagram of an inductor coil of one embodiment of an electromagnetic induction based non-shear stranded wire electrical connection insert of the present invention.
Detailed Description
The invention will be further elucidated by means of specific embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 and 2, the non-shearing twisted wire electrical connection plug-in based on electromagnetic induction of the present embodiment includes: the electric connection plug-in packaging shell 1, the bracket 2, the inductance coil 3, the fixing piece 4, the inductance coil control line interface 5, the control end electric connection line input port 6, the control end electric connection line output port 7 and the electric connection plug-in fixing device 9; wherein, two inductance coils 3 are arranged on the bracket 2 through a fixing piece 4; the bracket 2 provided with the two induction coils 3 is encapsulated in the electrical connection plug-in packaging shell 1; two inductance coil control line interfaces 5, a control end electrical connection line input port 6 and a control end electrical connection line output port 7 are respectively arranged on the electrical connection plug-in packaging shell 1; the control bus of the main control system is divided into a plurality of data lines for coupling energy and information through the deconcentrator, and each data line 8 passes through the central axis of a corresponding one of the induction coils 3 through the input port 6 of the electric connecting wire at the control end and returns to the main control system from the output port 7 of the electric connecting wire at the control end to form a complete control loop; each inductor coil 3 corresponds to one electronic detonator, and each inductor coil 3 is connected to the corresponding electronic detonator through an inductor coil control line interface 5 by a data line; four mounting jacks are arranged at the bottom of the electrical connection plug-in package housing 1, and the electrical connection plug-in fixing device 9 is fixedly mounted on the electrical connection plug-in package housing 1 through the mounting jacks. The corner of the electrical connection plug-in packaging shell 1 is quarter-round, no sharp angle exists, and the assembly with the inductance coil structure can be efficiently realized.
In the embodiment, the electrical connection plug-in packaging shell adopts polytetrafluoroethylene, the bracket adopts polytetrafluoroethylene, and the inductance coil adopts gold plating on the surface of the nickel-iron material; from theoretical calculation, the section diameter of a single wire of the induction coil is 0.5-2 mm, and the coil number of the induction coil is 5-15, as shown in fig. 3.
When performing single or multiple point detonation tasks:
1. the upper computer at the master control end selects the detonation position through calculation and arranges the detonation time of the electronic detonators at each detonation point through task planning;
2. the system is electrified, multi-detonation point information communication is carried out through the non-stranded electrical connection plug-in, so that the detection of the state of the whole system is realized, the position of the electric detonator to be detonated is marked, the induction of setting information is realized according to the arrangement of the main control system, and the registration of the electronic detonator at each detonation point and the charging of the detonation capacitor are completed;
3. and finally, stable and reliable detonation of the electronic detonator at each point is realized through delay time setting. The complexity of the engineering application in which the initiation of the electronic detonator is performed varies due to environmental factors, such as: the non-stranded wire type electrical appliance connecting plug-in unit designed by the invention effectively avoids the factors of short circuit, unreliable contact and the like of electrical connection in a thunder or wet environment, and finally realizes reliable detonation.
Finally, it should be noted that the examples are disclosed for the purpose of aiding in the further understanding of the present invention, but those skilled in the art will appreciate that: various alternatives and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the disclosed embodiments, but rather the scope of the invention is defined by the appended claims.
Claims (8)
1. An electrical connector for a non-shearing twisted wire based on electromagnetic induction, the electrical connector being disposed between a host system and an electronic detonator, the electrical connector comprising: the electric connection plug-in unit comprises an encapsulation shell, a bracket, an inductance coil control line interface, a control end electric connection line input port and a control end electric connection line output port; wherein, one or more inductance coils are arranged on the bracket through a fixing piece; a bracket with one or more inductance coils is packaged in an electrical connection plug-in packaging shell; an inductance coil control line interface, a control end electrical connection line input port and a control end electrical connection line output port are respectively arranged on the electrical connection plug-in packaging shell, and the number of the inductance coil control line interfaces is consistent with that of the inductance coils; the control bus of the main control system is divided into a plurality of data lines for coupling energy and information through the deconcentrator, and each data line passes through the central shaft of a corresponding inductance coil through the input port of the electric connecting wire at the control end and returns to the main control system from the output port of the electric connecting wire at the control end to form a complete control loop; each inductance coil corresponds to one electronic detonator, and each inductance coil is connected to the corresponding electronic detonator through a data line via an inductance coil control line interface; the main control system sends signals, currents are generated in the data lines, the currents flow through the central axes of the induction coils, the induction coils induce the currents, and accordingly energy and information are received and transmitted to corresponding electronic detonators through the data lines.
2. The electrical connector insert of claim 1 wherein said electrical connector insert package housing is comprised of an electromagnetic interference resistant insulating material.
3. The electrical connector of claim 1, wherein the electrical connector package has a curved edge without sharp corners.
4. The electrical connector insert of claim 1 wherein said brackets are comprised of an electromagnetic interference resistant insulating material.
5. The electrical connector insert of claim 1 wherein, corresponding to each inductor coil, the support has one or more encapsulation cavities, the inner walls of the encapsulation cavities matching the outer edges of the inductor coils, the inductor coils being disposed within the respective encapsulation cavities, the inductor coils being disposed tangentially to the inner walls of the encapsulation cavities.
6. The electrical connector insert of claim 1 wherein the securing means is a retaining collar positioned on a concentric line of the inductor and tangential to an inner wall of the housing cavity of the bracket.
7. The electrical connector of claim 1, further comprising an electrical connector fixture having a plurality of mounting sockets disposed on a bottom of the electrical connector housing, the electrical connector fixture fixedly mounting the electrical connector housing through the mounting sockets.
8. A method for preparing an electrical connection plug-in of a non-shearing twisted wire based on electromagnetic induction, wherein the electrical connection plug-in is as claimed in any one of claims 1 to 7, and the preparation method comprises the following steps:
1) Preparing an inductance coil:
preparing an induction coil by adopting an antioxidant alloy material, wherein the section diameter of a single wire of the induction coil is 0.5-2 mm, and the coil number of the induction coil is 5-15 circles;
2) Preparing a bracket:
an anti-electromagnetic interference insulating material is adopted and corresponds to each inductance coil to form one or more packaging cavities, and the inner wall of each packaging cavity is matched with the outer edge of each inductance coil;
3) And (3) installing an inductance coil:
placing one or more inductance coils in the corresponding packaging cavities, placing the inductance coils tangentially to the inner walls of the packaging cavities, and fixedly mounting the inductance coils on the inner walls of the brackets by adopting fixing pieces;
4) Preparing an electrical connection plug-in packaging shell:
preparing an electrical connection plug-in packaging shell with no sharp angle at the edge by adopting an anti-electromagnetic interference insulating material, respectively arranging an inductance coil control line interface, a control end electrical connection line input port and a control end electrical connection line output port on the electrical connection plug-in packaging shell, and arranging a plurality of installation jack holes at the bottom of the electrical connection plug-in packaging shell;
5) And (3) packaging:
encapsulating the bracket with the one or more inductor coils mounted therein within an electrical connection insert encapsulation housing;
6) And (3) electric connection:
the control bus of the main control system is divided into a plurality of data lines for energy and information coupling through the deconcentrator, each data line passes through the central shaft of a corresponding one of the induction coils through the input port of the electric connecting wire at the control end, and returns to the main control system from the output port of the electric connecting wire at the control end to form a complete control loop, and each induction coil is connected to a corresponding electronic detonator through the interface of the control wire of the induction coil through the data line;
7) Fixing:
the electric connection plug-in unit fixing device is used for fixing and installing the electric connection plug-in unit packaging shell through the installation jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136508.9A CN109103676B (en) | 2018-09-28 | 2018-09-28 | Non-shearing stranded wire electric connection plug-in based on electromagnetic induction and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136508.9A CN109103676B (en) | 2018-09-28 | 2018-09-28 | Non-shearing stranded wire electric connection plug-in based on electromagnetic induction and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109103676A CN109103676A (en) | 2018-12-28 |
| CN109103676B true CN109103676B (en) | 2023-05-12 |
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| CN201811136508.9A Active CN109103676B (en) | 2018-09-28 | 2018-09-28 | Non-shearing stranded wire electric connection plug-in based on electromagnetic induction and method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517895A (en) * | 1982-11-15 | 1985-05-21 | E. I. Du Pont De Nemours And Company | Electric initiator resistant to actuation by radio frequency and electrostatic energies |
| CA2238046A1 (en) * | 1995-11-20 | 1997-05-29 | Austin Powder Company | Detonator packaging |
| CN2743785Y (en) * | 2004-10-14 | 2005-11-30 | 云南燃一有限责任公司 | Magnetoelectric electronic delay electric detonator |
| CN201277840Y (en) * | 2008-10-15 | 2009-07-22 | 雅化集团绵阳实业有限公司 | Remote detonator |
| CN102519327A (en) * | 2011-12-09 | 2012-06-27 | 银庆宇 | Method and device for connecting and controlling electronic detonator priming device and electronic detonator |
| CN202372069U (en) * | 2011-12-09 | 2012-08-08 | 银庆宇 | Electronic detonator controller |
| CN103715944A (en) * | 2013-11-27 | 2014-04-09 | 北京机械设备研究所 | Magnetic flux compression generator employing vacuum insulation |
| CN107843161A (en) * | 2017-11-03 | 2018-03-27 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of timed detonation device and method |
-
2018
- 2018-09-28 CN CN201811136508.9A patent/CN109103676B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517895A (en) * | 1982-11-15 | 1985-05-21 | E. I. Du Pont De Nemours And Company | Electric initiator resistant to actuation by radio frequency and electrostatic energies |
| CA2238046A1 (en) * | 1995-11-20 | 1997-05-29 | Austin Powder Company | Detonator packaging |
| CN2743785Y (en) * | 2004-10-14 | 2005-11-30 | 云南燃一有限责任公司 | Magnetoelectric electronic delay electric detonator |
| CN201277840Y (en) * | 2008-10-15 | 2009-07-22 | 雅化集团绵阳实业有限公司 | Remote detonator |
| CN102519327A (en) * | 2011-12-09 | 2012-06-27 | 银庆宇 | Method and device for connecting and controlling electronic detonator priming device and electronic detonator |
| CN202372069U (en) * | 2011-12-09 | 2012-08-08 | 银庆宇 | Electronic detonator controller |
| CN103715944A (en) * | 2013-11-27 | 2014-04-09 | 北京机械设备研究所 | Magnetic flux compression generator employing vacuum insulation |
| CN107843161A (en) * | 2017-11-03 | 2018-03-27 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of timed detonation device and method |
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| CN109103676A (en) | 2018-12-28 |
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