CN105095797A - Physical self-destruct control circuit of electronic data storage unit - Google Patents
Physical self-destruct control circuit of electronic data storage unit Download PDFInfo
- Publication number
- CN105095797A CN105095797A CN201510602522.3A CN201510602522A CN105095797A CN 105095797 A CN105095797 A CN 105095797A CN 201510602522 A CN201510602522 A CN 201510602522A CN 105095797 A CN105095797 A CN 105095797A
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- China
- Prior art keywords
- self
- destruction
- control circuit
- circuit
- storage unit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
Abstract
The invention discloses a physical self-destruct control circuit of an electronic data storage unit. The physical self-destruct control circuit comprises a decoding circuit and a switching circuit connected with each other. A decoder is connected with five I/O interfaces through three decoding input ends and two enabling ends. When input signals received by the three decoding input ends and the two enabling ends accord with the predetermined logic, the decoding circuit controls the switching circuit to conduct switching and outputs self-destruct voltage to a power terminal of the electronic data storage unit. By means of the physical self-destruct control circuit, physical damage to media of the electronic data storage unit can be achieved in an extremely short period of time, and thus the data self-destruct function that the stored data cannot be recovered is achieved.
Description
Technical field
The present invention relates to self-destruction control circuit, particularly relate to a kind of physics self-destruction control circuit of electronic data storage unit.
Background technology
The electronic data storage unit of equipment at certain in particular cases, needs the mode by the data content of storage is damaged with physics thoroughly to destroy, and makes it to carry out Information recovering again.But when burning, likely thorough not, or the time of burning is longer; What is more, may miss send out command-destruct because of program out of control.Therefore how ensureing that electronic data storage unit is thoroughly destroyed at short notice, and be not easy to produce command-destruct by mistake, is the technical matters needing emphasis to solve.
Summary of the invention
Object of the present invention, is to provide in a kind of short time and can thoroughly burns electronic data storage unit, and can not produce that miss command-destruct, safe and reliable physics self-destruction control circuit.
The present invention in order to the technical scheme realizing goal of the invention and adopt is:
A kind of physics self-destruction control circuit of electronic data storage unit is provided, comprises the decoding scheme and commutation circuit that are connected;
Described code translator is connected with five I/O interfaces of task control system with two Enable Pins by three tunnel decoding input ends;
When the input signal that three tunnel decoding input ends and two Enable Pins receive meets the logic of making an appointment, this decoding scheme controls commutation circuit and switches, and exports the power end of self-destruction voltage to electronic data storage unit.
In physics self-destruction control circuit of the present invention, be also connected with phase inverter and delay circuit between decoding scheme and commutation circuit, the voltage signal that code translator exports is reverse through phase inverter, then controls commutation circuit work after delay circuit time delay.
In physics self-destruction control circuit of the present invention, described commutation circuit is double relay power switching circuitry, comprises two relays, controls the switching of self-destruction positive polarity and negative pole respectively.
In physics self-destruction control circuit of the present invention, this physics self-destruction control circuit also comprises self-destruction action indicating circuit, is connected with commutation circuit.
In physics self-destruction control circuit of the present invention, described self-destruction action indicating circuit comprises two light emitting diodes, is connected respectively with two relays of double relay power switching circuitry.
In physics self-destruction control circuit of the present invention, this double relay power switching circuitry also comprises two manual wire jumpers, for controlling the break-make of two relay coil power circuits in double relay power switching circuitry, could normally work when manual wire jumper is in on-state commutation circuit.
In physics self-destruction control circuit of the present invention, described delay circuit is RC delay circuit.
The beneficial effect that the present invention produces is: physics self-destruction control circuit of the present invention is after receiving command-destruct, apply the feeder ear of superpotential to electronic data storage unit voluntarily, make this storage unit circuit bear superpotential and puncture to burn, the physical damage of electronic data storage unit medium is caused, to realize the data self-destroying function that storage data cannot be recovered in very short time.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is that electronic data storage unit of the present invention adds superpotential self-destruction schematic diagram;
Fig. 2 is that physics will the access schematic diagram of control circuit;
Fig. 3 is the theory diagram of self-destruction control circuit of the present invention;
Fig. 4 is embodiment of the present invention code translator and RC delay circuit schematic diagram;
Fig. 5 is that embodiment of the present invention relay switches and self-destruction indicating circuit schematic diagram.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The principle of work of the physics self-destruction control circuit of electronic data storage unit of the present invention is: after receiving data self-destruction steering order, the superpotential (as more than+15V/1A) that data self-destruct circuit applies certain hour voluntarily burns data storage medium, realizes the storage medium physical damage of electronic data storage unit.
As shown in Figure 1 and Figure 2, the operating voltage of electronic data storage unit is that memory circuit and read/write circuit are powered, for SD card, its operating voltage is+3.3V, this voltage and be all directed to data self-destruct circuit plate for the superpotential (legend is+24V) of self-destruction, task control system sends data command-destruct to self-destruction control circuit board, and superpotential is added to storage unit power end and causes storage unit to burn by pilot relay contact change-over, realizes Data Physical self-destruction.The self-destruct circuit of data storage cell and self working power Jin Xu mono-tunnel+5V voltage of relay coil.
The physics self-destruction control circuit of the electronic data storage unit of the embodiment of the present invention, comprises the decoding scheme 10 and commutation circuit 40 that are connected;
Code translator is connected with five I/O interfaces of task control system with two Enable Pins by three tunnel decoding input ends;
When the input signal that three tunnel decoding input ends and two Enable Pins receive meets the logic of making an appointment, this decoding scheme 10 controls commutation circuit 40 and switches, and exports the power end of self-destruction voltage to electronic data storage unit.
The power end supply normal working voltage of the electronic data storage unit of equipment at ordinary times, when needs realize data self-destruction then in this power end supply superpotential, power end why is chosen to apply superpotential, because all electronic devices and components that this power supply is electronic data storage unit are powered, it is the widest that power end applies superpotential failure mechanics, can realize the most effectively damaging.The overvoltage of direct current applied derives from the power supply of superior system, is not connected in series fuse, can provides enough large power, and superpotential applies to keep a period of time (time delay 15s), can guarantee that storage unit (chip) is burnt completely.
For ensureing the accuracy that the physics self-destruction of electronic data storage unit has operated and reliability, as shown in Figure 4, the physics self-destruct circuit of electronic data storage unit adopts the mode of decoding input to receive the command-destruct of task control system, data self damaging order interface adopts 3-8 code translator 54LS138 to realize, simultaneously to code translator Enable Pin (E1, E2 is connected as one end, E3 is as the other end) control, realize (the three tunnel decoding inputs of five I/O mouths, two-way is enable) A, B, C, D, when E meets the logic of agreement simultaneously, code translator could export the function of self-destruction control voltage, in the embodiment of the present invention, logic can be defined as: A=1, B=0, C=1, D=0, E=1.Meet the decoding output terminal Y5 level of 54LS138 during this logic by high step-down, this level is anti-phase through phase inverter 2054LS04, RC delay process, is divided into two-way and controls two relays switchings, complete the operation of electronic data physics self-destruction.Design RC time delay process is to allow the short time undesired signals such as spike that inverse gate can not be made to overturn, and ensures relay to interference without response.
As shown in Figure 3, in one embodiment of the present of invention, also be connected with phase inverter 20 and delay circuit 30 between decoding scheme 10 and commutation circuit 40, the voltage signal that code translator exports is reverse through phase inverter 20, then after delay circuit 30 time delay, controls commutation circuit 40 work.
As shown in Figure 4, in the embodiment of the present invention, commutation circuit 40 is relay commutation circuit, and the voltage that code translator exports, through anti-phase and after time delay, drives the work of triode 3DK4 pilot relay; Relay commutation circuit have employed double relay complete design, namely have employed the relay of two single-contact coil working voltage 5V, realize the switching of self-destruction positive polarity and negative pole respectively, double relay works simultaneously and could realize self-destruction operation, make storage card circuit mutually isolated with self-destruction voltage at ordinary times like this, even if can ensure that a road relay occurs surprisingly also can not burning memory circuit simultaneously, namely improve the accuracy security of self-destruction operation.
This circuit adopts+5V to power, and the operating voltage of electronic data storage unit and superpotential all cause on this circuit board, to realize data self-destruction operation.
As shown in Figure 5; as safeguard measure, self-destruction control loop arranges manual wire jumper S1, S2, for the break-make in pilot relay coil electricity loop; wire jumper on-state just can carry out data self-destruction operation, and object is preventing unexpected factor from causing the actuating of relay to cause storage unit to damage at ordinary times.For the ease of observing, self-destruction control circuit board devises self-destruction action indicating circuit, and self-destruction action indicating circuit can be light emitting diode, as being red light emitting diodes, it is in parallel with relay coil, and two relays are respectively joined light emitting diode H1, a H2 and indicated respectively.When carrying out self-destroying function test at ordinary times (manual wire jumper disconnection), as lumination of light emitting diode illustrates the actuating of relay, self-destroying function is normal, can viewing lamp at any time in debugging test at ordinary times, to verify the reliability that self-destruction controls.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (7)
1. a physics self-destruction control circuit for electronic data storage unit, is characterized in that, comprises the decoding scheme and commutation circuit that are connected;
Described code translator is connected with five I/O interfaces of task control system with two Enable Pins by three tunnel decoding input ends;
When the input signal that three tunnel decoding input ends and two Enable Pins receive meets the logic of making an appointment, this decoding scheme controls commutation circuit and switches, and exports the power end of self-destruction voltage to electronic data storage unit.
2. physics self-destruction control circuit according to claim 1, it is characterized in that, also be connected with phase inverter and delay circuit between decoding scheme and commutation circuit, the voltage signal that code translator exports is reverse through phase inverter, then controls commutation circuit work after delay circuit time delay.
3. physics self-destruction control circuit according to claim 1, it is characterized in that, described commutation circuit is double relay power switching circuitry, comprises two relays, controls the switching of self-destruction positive polarity and negative pole respectively.
4. physics self-destruction control circuit according to claim 3, is characterized in that, this physics self-destruction control circuit also comprises self-destruction action indicating circuit, is connected with commutation circuit.
5. physics self-destruction control circuit according to claim 4, is characterized in that, described self-destruction action indicating circuit comprises two light emitting diodes, is connected respectively with two relays of double relay power switching circuitry.
6. physics self-destruction control circuit according to claim 3, it is characterized in that, this double relay power switching circuitry also comprises two manual wire jumpers, for controlling the break-make of two relay coil power circuits in double relay power switching circuitry, when manual wire jumper is in on-state, commutation circuit could normal work.
7. physics self-destruction control circuit according to claim 2, is characterized in that, described delay circuit is RC delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510602522.3A CN105095797A (en) | 2015-09-21 | 2015-09-21 | Physical self-destruct control circuit of electronic data storage unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510602522.3A CN105095797A (en) | 2015-09-21 | 2015-09-21 | Physical self-destruct control circuit of electronic data storage unit |
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| CN105095797A true CN105095797A (en) | 2015-11-25 |
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| CN201510602522.3A Pending CN105095797A (en) | 2015-09-21 | 2015-09-21 | Physical self-destruct control circuit of electronic data storage unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108615809A (en) * | 2018-03-26 | 2018-10-02 | 北京大学 | A kind of implementation method of controllable self-destruction resistance-variable storing device array |
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| CN101345076A (en) * | 2007-07-09 | 2009-01-14 | 深圳市研祥智能科技股份有限公司 | Electronic hard disk and electronic equipment |
| CN201465553U (en) * | 2009-05-04 | 2010-05-12 | 同方股份有限公司 | Mobile storage device with self-destruction function |
| CN201788501U (en) * | 2010-08-19 | 2011-04-06 | 中国船舶重工集团公司第七○九研究所 | Safe mobile storage device |
| CN104492785A (en) * | 2014-11-24 | 2015-04-08 | 中国航空工业集团公司洛阳电光设备研究所 | Physical destruction system |
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2015
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| US20040086927A1 (en) * | 1990-11-29 | 2004-05-06 | Applera Corporation, A De Corporation | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control |
| CN101345076A (en) * | 2007-07-09 | 2009-01-14 | 深圳市研祥智能科技股份有限公司 | Electronic hard disk and electronic equipment |
| CN201465553U (en) * | 2009-05-04 | 2010-05-12 | 同方股份有限公司 | Mobile storage device with self-destruction function |
| CN201788501U (en) * | 2010-08-19 | 2011-04-06 | 中国船舶重工集团公司第七○九研究所 | Safe mobile storage device |
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| CN108615809A (en) * | 2018-03-26 | 2018-10-02 | 北京大学 | A kind of implementation method of controllable self-destruction resistance-variable storing device array |
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Application publication date: 20151125 |