CN112969357B - Anti-strong electromagnetic pulse reinforcement method for nuclear security system and nuclear security system - Google Patents
Anti-strong electromagnetic pulse reinforcement method for nuclear security system and nuclear security system Download PDFInfo
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- CN112969357B CN112969357B CN202110144029.7A CN202110144029A CN112969357B CN 112969357 B CN112969357 B CN 112969357B CN 202110144029 A CN202110144029 A CN 202110144029A CN 112969357 B CN112969357 B CN 112969357B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The invention relates to a strengthening method for resisting strong electromagnetic pulse of a nuclear security system and the nuclear security system, comprising the following steps: the strengthening method comprises the following steps of 1) shielding by using a structural box body, 2) shielding by using an optical isolation signal, 3) internal processing of equipment, 4) power supply improvement, and 5) circuit improvement of a circuit board, wherein the nuclear security system comprises an entrance guard host, an alarm center end, an alarm extension, a switch, a nuclear shield platform, an infrared detector, a microwave detector, a camera, a door lock and a button.
Description
Technical Field
The invention particularly relates to a strengthening method for resisting strong electromagnetic pulse of a nuclear security system and the nuclear security system.
Background
The high-altitude nuclear electromagnetic pulse (HEMP) is one of main killing factors generated by high-altitude nuclear explosion, and has the characteristics of high energy intensity, high peak field intensity, extremely wide coverage range and the like. The HEMP can be coupled to almost all electronic and electrical equipment on a macro scale as a strong interference source, interfere or destroy relevant important social infrastructure such as the electronic equipment, a command communication system and electronic and electrical equipment, and cause damage and functional disorder of system hardware, so that the reliability and safety of the system are reduced. At present, a nuclear security system used in nuclear-involved places such as nuclear power stations, nuclear raw material plants and the like does not have the capacity of resisting the high-altitude nuclear electromagnetic pulse, and an access control host and an alarm branch machine of the nuclear security system are damaged by the high-altitude nuclear electromagnetic pulse, so that the alarm cannot be effectively uploaded in emergency situations, and the door cannot be normally opened and closed at an access.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, a strengthening method for resisting strong electromagnetic pulses of a nuclear security system and the nuclear security system are provided.
The technical scheme adopted by the invention for solving the technical problem is as follows: a strengthening method for anti-strong electromagnetic pulse of a nuclear security system comprises the following steps:
1) Shielding by using a structural box body: a galvanized sheet shielding box body is arranged outside, and the power adapter and the extension set are placed in the box body;
2) Shielding by using an optical isolation signal: the optical module is used for converting network and switching value signals into optical signals, the optical module is installed in the box body, and a 220V power supply interface and a light interface are externally arranged on the box body;
3) And (3) internal processing of the equipment: a. the door opening modes of the alarm extension and the entrance guard host adopt a row hinge mode, and a long and narrow seam between the door covers is eliminated; b. the radiating holes are changed from strip-shaped holes to small round holes, and the positions are changed to diagonal arrangement, so that convection heat dissipation is facilitated; c. the end surface of the lower end of the box body is directly grounded, so that the contact area with the ground is increased; d. the internal power module and the optical module are shielded by a shielding case; e. the inside adopts ultra-six types of shielding net wires and shielding cables;
4) The power supply is improved: the 220V power supply input adopts a built-in anti-electromagnetic pulse interference filter power supply seat, and the 12V power supply with internal power supply adopts a power adapter with ferrite beads and strong anti-interference capability;
5) The circuit of the circuit board is improved: in the signal detection circuit, the sampling voltage is set to be 12V, a nanosecond TVS tube is arranged, and a voltage dependent resistor is added at the front end of the circuit.
Preferably, the signal detection circuit in the step 5) includes a first resistor, a second resistor, a third resistor, a voltage dependent resistor, a TVS tube, a first diode and a second diode, one end of the first resistor is externally connected with 12V sampling voltage, the other end of the first resistor is grounded after being connected with the second resistor and the third resistor in series, the voltage dependent resistor is connected with a series circuit of the second resistor and the third resistor in parallel, one end of the second resistor and one end of the third resistor which are connected with each other are both connected with an external analog signal input end, the TVS tube is connected with the third resistor in parallel, the analog signal input end is externally connected with a 3.3V power supply through the first diode, the conduction direction of the first diode is that the analog signal input end points to the 3.3V power supply, the analog signal input end is grounded through the second diode, and the conduction direction of the second diode is that the grounding end points to the analog signal input end.
Preferably, the TVS tube is a bidirectional voltage regulator tube.
The nuclear security system comprises an entrance guard host, an alarm center end, an alarm extension, a switch, a nuclear shield platform, an infrared detector, a microwave detector, a camera, a door lock and a button, wherein the nuclear shield platform, the alarm center end, the entrance guard host and the alarm extension are all electrically connected with the switch, the infrared detector, the microwave detector and the camera are all electrically connected with the alarm extension, and the door lock and the button are all electrically connected with the entrance guard host.
Preferably, the distance between the door lock and the button and the entrance guard host is less than 20m, the distance between the infrared detector, the microwave detector, the camera and the alarm extension is less than 50m, the distance between the alarm center end and the switch is less than 20m, the distance between the nuclear shield platform and the switch is less than 20m, and the distances between the entrance guard host, the alarm extension and the switch are less than 2km.
The strengthening method and the strengthening system have the advantages that the anti-strong electromagnetic pulse strengthening method and the nuclear security system can effectively improve the anti-interference capability of the nuclear security system to resist the nuclear electromagnetic pulse, and ensure that the nuclear security system can still normally work when high-altitude explosion occurs.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a circuit diagram of the strengthening method against strong electromagnetic pulses of the nuclear security system and the signal detection circuit of the nuclear security system;
FIG. 2 is a system schematic diagram of the nuclear security system reinforcing method against strong electromagnetic pulses and the nuclear security system of the present invention;
in the figure: r1, a first resistor, R2, a second resistor, R3, a third resistor, D1, a first diode, D2, a second diode, D3, a TVS tube and Z1, a piezoresistor.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.
The embodiment is as follows: a strengthening method for anti-strong electromagnetic pulse of a nuclear security system comprises the following steps:
1) Shielding by using a structural box body: a galvanized sheet shielding box body is arranged outside, and the power adapter and the extension set are placed in the box body;
the box body is actually a square box body with a conventional structure, and as a large number of exposed switching value input and output interfaces exist in the alarm extension of the nuclear security system, nuclear electromagnetic pulses are easily coupled into equipment through the interfaces to damage the IO ports of the chips, and a power adapter and the extension are placed inside the equipment to achieve a good protection effect.
2) Shielding by using an optical isolation signal: the optical module is used for converting network and switching value signals into optical signals, the optical module is installed in the box body, and a 220V power supply interface and a light interface are arranged outside the box body;
the network cable and the switching value twisted-pair line of the alarm extension and the entrance guard host are long in line, and nuclear power pulses are easily coupled into equipment through the network cable and the twisted-pair line to cause equipment damage, so that the network and the switching value signals are converted into optical signals through the optical module, the optical module is installed inside the box body, the box body only has a 220V power interface and an optical fiber interface outwards, and a path of nuclear electromagnetic pulses coupled through the line can be cut off.
3) And (3) internal processing of the equipment: a. the door opening modes of the alarm extension and the entrance guard host adopt a row hinge mode, and long and narrow gaps between door covers are eliminated; b. the radiating holes are changed into small round holes from strip-shaped holes, and the positions are changed into diagonal arrangement, so that convection heat radiation is facilitated; c. the end surface of the lower end of the box body is directly grounded, so that the contact area with the ground is increased; d. the internal power module and the optical module are shielded by a shielding case; e. the inside adopts ultra-six types of shielding net wires and shielding cables;
the original alarm extension and the original entrance guard host generally adopt a hinge door opening mode, the gap is long, and the long and narrow gap between the door covers can be eliminated by adopting a row hinge mode; in fact, the exterior of the tank is not painted, which makes it possible to maintain the lower end of the tank in good contact with the ground.
4) And (3) power supply improvement: the 220V power supply input adopts a built-in filter power supply seat for resisting electromagnetic pulse interference, and the 12V power supply for supplying power internally adopts a power supply adapter with ferrite beads and strong anti-interference capability;
5) The circuit of the circuit board is improved: in the signal detection circuit, the sampling voltage is set to be 12V, a nanosecond TVS tube is arranged, and a voltage dependent resistor is added at the front end of the circuit.
The switching value signal detection circuit of the alarm extension adopts the IO port of the MCU to collect voltage, although the TVS tube is added to a simulation prototype before reinforcement, the IO port is still punctured during testing. The sampling voltage of the reinforced prototype is improved from 3.3V to 12V, the anti-interference capability can be improved, meanwhile, the resistance voltage division is increased, a certain buffering effect can be achieved, in addition, the millisecond-level TVS tube is changed into the nanosecond-level TVS tube, the piezoresistor protection is added at the front end, the multiple protection is achieved, and the surge resistance capability can be effectively improved.
As shown in fig. 1, the signal detection circuit in step 5) includes a first resistor, a second resistor, a third resistor, a voltage dependent resistor, a TVS tube, a first diode, and a second diode, where one end of the first resistor is externally connected to 12V sampling voltage, the other end of the first resistor is connected to the second resistor and the third resistor in series and then grounded, the voltage dependent resistor is connected to the series circuit of the second resistor and the third resistor in parallel, one end of the second resistor connected to the third resistor is connected to an external analog signal input terminal, the TVS tube is connected to the third resistor in parallel, the analog signal input terminal is externally connected to a 3.3V power supply through the first diode, the first diode is connected to the 3.3V power supply through the analog signal input terminal, the analog signal input terminal is grounded through the second diode, and the second diode is connected to the analog signal input terminal through a ground terminal.
Preferably, the TVS tube is a bidirectional voltage regulator tube.
As shown in fig. 2, a nuclear security system adopting the method for reinforcing the nuclear security system against strong electromagnetic pulses comprises an entrance guard host, an alarm center end, an alarm extension, a switch, a nuclear shield platform, an infrared detector, a microwave detector, a camera, a door lock and a button, wherein the nuclear shield platform, the alarm center end, the entrance guard host and the alarm extension are all electrically connected with the switch, the infrared detector, the microwave detector and the camera are all electrically connected with the alarm extension, and the door lock and the button are all electrically connected with the entrance guard host.
Preferably, the distance between the door lock and the button and the entrance guard host is less than 20m, the distance between the infrared detector, the microwave detector, the camera and the alarm extension is less than 50m, the distance between the alarm center end and the switch is less than 20m, the distance between the nuclear shield platform and the switch is less than 20m, and the distances between the entrance guard host and the alarm extension and the switch are less than 2km.
When the nuclear security system reinforced by the reinforcing method is used for simulating high-altitude nuclear explosion experiments, namely irradiation experiments, the nuclear power pulse environment parameters are set as follows: the intensity is set to be 50kv/m, the rise time equipment of the time waveform is 2.3 plus or minus 0.5ns, the full width at half maximum is 23 plus or minus 5ns, and the system can ensure normal operation work through the replacement of 3 placing directions and 9 times of irradiation tests.
Compared with the prior art, the strengthening method for resisting the strong electromagnetic pulse of the nuclear security system and the nuclear security system can effectively improve the anti-interference capability of the nuclear security system for resisting the nuclear electromagnetic pulse, and ensure that the nuclear security system can still normally work when high-altitude explosion occurs.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A nuclear security system anti-strong electromagnetic pulse reinforcement method is characterized in that the nuclear security system comprises an entrance guard host, an alarm extension, a power module, a power adapter and an optical module; the method comprises the following steps:
1) Shielding by using a structural box body: a galvanized sheet shielding box body is arranged outside, and a power adapter and an alarm extension set are placed in the box body;
2) Shielding by using an optical isolation signal: the optical module is used for converting network and switching value signals into optical signals, the optical module is installed in the box body, and a 220V power supply interface and a light interface are externally arranged on the box body;
3) And (3) internal processing of the equipment: a. the door opening modes of the alarm extension and the entrance guard host adopt a row hinge mode; b. the radiating holes are changed into small round holes from strip-shaped holes, and the positions are arranged diagonally, so that convection heat radiation is facilitated; c. the end surface of the lower end of the box body is directly grounded, so that the contact area with the ground is increased; d. the power module and the optical module in the box body are shielded by a shielding case; e. the inside of the box body adopts six types of shielding net wires and shielding cables;
4) The power supply is improved: the 220V power supply input adopts a built-in anti-electromagnetic pulse interference filter power supply seat, and the 12V power supply with internal power supply adopts a power adapter with ferrite beads and strong anti-interference capability;
5) The circuit of the circuit board is improved: in a switching value signal detection circuit of the alarm extension, the sampling voltage is set to be 12V, a nanosecond TVS tube is arranged, and a voltage dependent resistor is added at the front end of the circuit;
switching value signal detection circuitry includes first resistance, second resistance, third resistance, piezo-resistor, TVS pipe, first diode and second diode, the external 12V sampling voltage of one end of first resistance, the other end of first resistance and second resistance and third resistance ground connection after establishing ties, piezo-resistor is parallelly connected with the series circuit of second resistance and third resistance, the one end of second resistance and third resistance interconnect all is connected with outside analog signal input, TVS pipe and third resistance parallelly connected, analog signal input passes through the external 3.3V power of first diode, the direction of conduction of first diode is by the directional 3.3V power of analog signal input, the analog signal input passes through second diode ground connection, the direction of conduction of second diode is by the directional analog signal input of earthing terminal.
2. The method for reinforcing strong electromagnetic pulse resistance of the nuclear security system according to claim 1, wherein the TVS tube is a bidirectional voltage regulator tube.
3. The nuclear security system adopting the strengthening method for the strong electromagnetic pulse resistance of the nuclear security system according to claim 1 or 2, further comprising an alarm center end, a switch, a nuclear shield platform, an infrared detector, a microwave detector, a camera, a door lock and a button, wherein the nuclear shield platform, the alarm center end, the entrance guard host and the alarm extension are all electrically connected with the switch, the infrared detector, the microwave detector and the camera are all electrically connected with the alarm extension, and the door lock and the button are all electrically connected with the entrance guard host.
4. A nuclear security system according to claim 3, wherein the distance between the door lock and the button and the entrance guard host is less than 20m, the distance between the infrared detector, the microwave detector and the camera and the alarm extension is less than 50m, the distance between the alarm center and the switch is less than 20m, the distance between the nuclear shield platform and the switch is less than 20m, and the distances between the entrance guard host and the alarm extension and the switch are less than 2km.
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| CN202110144029.7A CN112969357B (en) | 2021-02-02 | 2021-02-02 | Anti-strong electromagnetic pulse reinforcement method for nuclear security system and nuclear security system |
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| CN202110144029.7A CN112969357B (en) | 2021-02-02 | 2021-02-02 | Anti-strong electromagnetic pulse reinforcement method for nuclear security system and nuclear security system |
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| CN112969357A CN112969357A (en) | 2021-06-15 |
| CN112969357B true CN112969357B (en) | 2023-02-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0422919A2 (en) * | 1989-10-11 | 1991-04-17 | WATERFORD RESEARCH & DEVELOPMENT LIMITED | Antistatic adhesive tape |
| JP2008152767A (en) * | 2006-11-24 | 2008-07-03 | Gunze Ltd | Film with transparent conductive coat for touch panel, and touch panel using this |
| CN104332217A (en) * | 2014-10-08 | 2015-02-04 | 广州方邦电子有限公司 | Free ground film and manufacturing method thereof, and shielding circuit board including free ground film and ground method thereof |
| CN107079611A (en) * | 2014-12-05 | 2017-08-18 | 拓自达电线株式会社 | Electromagnetic shielding film |
| CN206650912U (en) * | 2017-03-01 | 2017-11-17 | 昆山雅森电子材料科技有限公司 | High shielding EMI screened films |
-
2021
- 2021-02-02 CN CN202110144029.7A patent/CN112969357B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0422919A2 (en) * | 1989-10-11 | 1991-04-17 | WATERFORD RESEARCH & DEVELOPMENT LIMITED | Antistatic adhesive tape |
| JP2008152767A (en) * | 2006-11-24 | 2008-07-03 | Gunze Ltd | Film with transparent conductive coat for touch panel, and touch panel using this |
| CN104332217A (en) * | 2014-10-08 | 2015-02-04 | 广州方邦电子有限公司 | Free ground film and manufacturing method thereof, and shielding circuit board including free ground film and ground method thereof |
| CN107079611A (en) * | 2014-12-05 | 2017-08-18 | 拓自达电线株式会社 | Electromagnetic shielding film |
| CN206650912U (en) * | 2017-03-01 | 2017-11-17 | 昆山雅森电子材料科技有限公司 | High shielding EMI screened films |
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| CN112969357A (en) | 2021-06-15 |
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