CN107219803A - It is a kind of to be used to detect that terminal opens or closes the device of lid in real time - Google Patents
It is a kind of to be used to detect that terminal opens or closes the device of lid in real time Download PDFInfo
- Publication number
- CN107219803A CN107219803A CN201710620696.1A CN201710620696A CN107219803A CN 107219803 A CN107219803 A CN 107219803A CN 201710620696 A CN201710620696 A CN 201710620696A CN 107219803 A CN107219803 A CN 107219803A
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- electric capacity
- resistance
- pin
- chip microcomputer
- diode
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- 239000013078 crystal Substances 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 19
- 230000005611 electricity Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010048669 Terminal state Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Burglar Alarm Systems (AREA)
Abstract
It is used to detect that terminal opens or closes the device of lid in real time the invention provides a kind of, the device is connected to the fixture and mainboard of terminal cover plate, described device includes power module, clock crystal X1, single-chip microcomputer, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2 and electric capacity C3, record is uncapped, closes the lid time in real time, be conducive to reviewing reason, and the duration uncapped is can know that, there is greater significance to the level of security for lifting terminal；Detection trigger point is realized by fixing side cover screw, with having larger difference compared with highly concealed type, and traditional mode, is difficult to be cracked；Using machine screws as detection trigger point, accuracy rate is high, not affected by environment, service life length, false triggering probability can be neglected；Terminal can obtain switch cover information in real time by serial ports, and realization forbids system to start, and the operation such as self-destruction file, autgmentability is strong.
Description
Technical field
It is used to detect that terminal opens or closes the device of lid in real time the present invention relates to a kind of.
Background technology
Terminal computer has been the necessity in the daily production of people, is applied in all trades and professions.For special sensitive
Industry, such as military project, finance are high to safety requirements grade, if if copy hard disc data occur, tearing the behavior such as dress interception facility after lid open
Do not found all cause major safety risks in time.The detection implementation of uncapping of conventional terminal is usually to use photoelectric sensing
Device or button are as detection sensor, and the problem of existing is that photoelectric sensor and other sensors are easily limited by environmental factor
System, causes the situation that error detection occurs or can't detect.There is the test of long-term reliability in mechanical key, easily failure；Traditional
Uncap detection only do detection function, do not possess record and uncap and close lid real-time time function, be unfavorable for occurring uncapping situation when chase after
Trace back reason of uncapping；System upper strata is acted without intelligent alarm and authority setting.
The content of the invention
The technical problem to be solved in the present invention, is to provide a kind of for detecting that terminal opens or closes the device of lid in real time, carries
The level of security of high terminal.
What the present invention was realized in：A kind of to be used to detect that terminal opens or closes the device of lid in real time, the device is connected to end
The fixture and mainboard of end casing, described device include power module, in addition to clock crystal X1, single-chip microcomputer, resistance R1, electricity
Hinder R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2 and electric capacity C3；The power module is connected to the one of the resistance R1
The one end at end, the pin 5 of single-chip microcomputer and resistance R3, the pin 4 of the single-chip microcomputer connects the other end of the resistance R1 respectively
And electric capacity C1 one end, the other end ground connection of the electric capacity C1, the pin 6 of the single-chip microcomputer is grounded, the single-chip microcomputer
Pin 7 connects the one end of one end of the resistance R2, clock crystal X1 pin 1 and electric capacity C2, and the single-chip microcomputer draws
Pin 8 is connected to one end of the other end of the resistance R2, clock crystal X1 pin 4 and electric capacity C3, the clock crystal X1
Pin 2, clock crystal X1 pin 3, the electric capacity C2 other end and electric capacity C3 other end ground connection；The resistance R3's is another
One end connects one end of the electric capacity C4 and resistance R4 one end respectively, divides after single-chip microcomputer pin 9 and pin 10 parallel connection
One end, the resistance R3 other end and the electric capacity C4 of the resistance R4 one end, the other end connection of the resistance R4 are not connected
To the fixture of the terminal cover plate, the other end ground connection of the electric capacity C4, the pin 11 and pin 12 of the single-chip microcomputer are connected
To the mainboard.
Further, the power module includes diode D1, diode D2 and battery, the sun of the diode D1
Pole is connected to motherboard power supply, and the battery is connected to the anode of the diode D2, the negative electrode and two of the diode D1
One end of one end of the resistance R1, the pin 5 of single-chip microcomputer and resistance R3 is connected after pole pipe D2 negative electrode is in parallel respectively.
Further, the power module also includes electric capacity C5 and electric capacity C6, described electric capacity C5 one end and electric capacity C6
The negative electrode of the diode D1 and diode D2 negative electrode, the other end and electricity of the electric capacity C5 are connected to after one end is in parallel
It is grounded after the other end parallel connection for holding C6.
Further, in addition to electrostatic protection device, the electrostatic protection device is connected to the pin 9 of single-chip microcomputer and drawn
Pin 10.
Further, in addition to a serial ports JP1, the pin 11 and pin 12 of the single-chip microcomputer are connected to by serial ports JP1
The mainboard.
Further, the single-chip microcomputer is MSP430FR2111.
Further, the diode D1 is Schottky diode, and the diode D2 is Schottky diode.
The advantage of the invention is that：The present invention is a kind of to be used to detect that terminal opens or closes the device of lid in real time, and record is opened in real time
Lid, pass lid time, be conducive to reviewing reason, and can know that the duration uncapped, have greater significance to the level of security for lifting terminal；
Detection trigger point is realized by fixing side cover screw, with having larger difference compared with highly concealed type, and traditional mode, is difficult to be cracked；
Using machine screws as detection trigger point, accuracy rate is high, not affected by environment, service life length, false triggering probability can be neglected；
Terminal can obtain switch cover information in real time by serial ports, and realization forbids system to start, and the operation such as self-destruction file, autgmentability is strong.
Brief description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1, which is that the present invention is a kind of, to be used to detect that terminal opens or closes the circuit theory diagrams of the device of lid in real time.
Embodiment
Refer to shown in Fig. 1, the present invention is used to detect that terminal opens or closes the device of lid in real time, and the device is connected to terminal cover
The fixture and mainboard of plate, described device include power module, clock crystal X1, single-chip microcomputer, resistance R1, resistance R2, resistance
R3, resistance R4, electric capacity C1, electric capacity C2, electric capacity C3, electrostatic protection device D3 and a serial ports JP1；The power module is connected to
One end of one end of the resistance R1, the pin 5 of single-chip microcomputer and resistance R3, the pin 4 of the single-chip microcomputer connects described respectively
The resistance R1 other end and electric capacity C1 one end, the other end ground connection of the electric capacity C1, the pin 6 of the single-chip microcomputer connect
Ground, the pin 7 of the single-chip microcomputer connects the one end of one end of the resistance R2, clock crystal X1 pin 1 and electric capacity C2,
The pin 8 of the single-chip microcomputer is connected to one end of the other end of the resistance R2, clock crystal X1 pin 4 and electric capacity C3,
The pin 2 of the clock crystal X1, clock crystal X1 pin 3, the electric capacity C2 other end and electric capacity C3 other end ground connection；
The other end of the resistance R3 connects one end of the electric capacity C4 and resistance R4 one end, the He of single-chip microcomputer pin 9 respectively
One end, the resistance R3 other end and the electric capacity C4 of the resistance R4 one end, the resistance are connected after the parallel connection of pin 10 respectively
The R4 other end is connected to the fixture of the terminal cover plate, the other end ground connection of the electric capacity C4, the pin of the single-chip microcomputer
11 and pin 12 be connected to the mainboard, the electrostatic protection device D3 is connected to the pin 9 and pin 10 of single-chip microcomputer, described
The pin 11 and pin 12 of single-chip microcomputer are connected to the mainboard by serial ports JP1, and the single-chip microcomputer is MSP430FR2111, monolithic
Machine can be serial (such as MSP430FR2110, MSP430FR2112 etc.) for MSP430, or the support of some other plates
RTC supports the single-chip microcomputer of low-power consumption, such as nuvoton nano103 systems class.
The power module includes diode D1, diode D2 and battery BT1, the diode D1 anode connection
To motherboard power supply, the battery BT1 is connected to the anode of the diode D2, the negative electrode and diode of the diode D1
One end of one end of the resistance R1, the pin 5 of single-chip microcomputer and resistance R3, the power supply are connected after D2 negative electrode is in parallel respectively
Module also includes electric capacity C5 and electric capacity C6, and the diode is connected to after described electric capacity C5 one end and the parallel connection of electric capacity C6 one end
D1 negative electrode and diode D2 negative electrode, are grounded, institute after the other end parallel connection of the other end and electric capacity C6 of the electric capacity C5
Diode D1 is stated for Schottky diode, the diode D2 is Schottky diode.
The present invention is set to be made up of several parts：Detection unit structure is made up of metal top cover, fixed side cover screw, stud, Gu
Determining part includes screw and stud, and the other end of the resistance R4 is connected on the stud of the terminal cover plate, and stud is in itself
One pull-up high level state, when on screwed lock, stud is connected by screw with casing to be grounded, and becomes low electricity
It is flat.Normal machines be it is upper be covered with and lock screw, be now that to detect be constant low level.It is low that stud is connected to monolithic machine testing
The saltus step of level to high level, which is represented, uncaps, otherwise represents and close lid.Uncapped state detection by chip microcontroller, terminal mainboard and
MCU communications are realized by serial ports.
2nd, detection unit structure realizes that terminal mainboard is fixed on machine by the screw positioning hole and mainboard of terminal mainboard altogether
Mainboard and casing be altogether when on shell.The screw fixing hole of metal top cover is opened in directly over the stud in uncapped state detection plate, and
Gap is left, gap is connected by screw and plays fixed cover and be grounded effect.
3rd, uncapped state detection plate uses TI low-power scm MSP430FR2111.Two GPIO pull-up of single-chip microcomputer
And it is connected to stud (position number：MTMS1).Two GPIO are used as the detection pin for uncapping and closing lid state.The power supply of single-chip microcomputer passes through
Two Schottky diode (positions number：D1, D2) realize battery BT1 (wherein battery BT1 can be lithium battery) and system power supply
The switching of (+V3.3S) power supply, when terminal in working condition then takes system power supply, now lithium battery not power consumption, when the non-upper electricity of terminal
State is by lithium battery power supply, and realization is not powered on that upper lid state can also be detected in real time even if terminal.Single-chip microcomputer real-time clock
Benchmark is by 32.768KHz crystal (position number：X1) provide, Fig. 1 is shown in the design of this Some principles；
4th, when upper lid screw is not locked, stud is pull-up high level state (being vacant state), and detection signal pins are
High level；When screw locks stud, it is low level on the ground that detection signal is connected to by screw.Normal machines are closed mode,
Signal is low, must first remove screw when machine is split lid, now have low level to be represented to high level saltus step and uncap, otherwise saltus step
Represent and close lid.Detection of uncapping is realized by MSP430FR2111 GPIO2.1pin, closes lid detection by MSP430FR2111's
GPIO2.0pin is realized.
5th, MSP430FR2111 single-chip microcomputers are defaulted as power down mode of sleeping, and now single-chip microcomputer only has serial ports, GPIO interruption inspections
Survey and real-time clock is in work.Uncap or close that lid action will wake up from sleep state and to record switch cover current when detecting
Time and be stored in the storage of single-chip microcomputer；
6th, terminal cycles through serial ports (position number：JP1 MCU) is read always, open and close lid record is seen if there is, if having and reading
The open and close lid time for taking MCU to store；
7th, when terminal reads uncapped state, forbid system to start and do alarm.System upper strata is settable to check this
The authority of detail state, is easy to review.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us is merely exemplary, rather than for the restriction to the scope of the present invention, is familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (7)
1. a kind of be used to detect that terminal opens or closes the device of lid in real time, the device is connected to fixture and the master of terminal cover plate
Plate, described device includes power module, it is characterised in that：Also include clock crystal X1, single-chip microcomputer, resistance R1, resistance R2, resistance
R3, resistance R4, electric capacity C1, electric capacity C2 and electric capacity C3；The power module is connected to one end of the resistance R1, single-chip microcomputer
One end of pin 5 and resistance R3, the pin 4 of the single-chip microcomputer connects the other end and electric capacity C1 of the resistance R1 respectively
One end, the other end ground connection of the electric capacity C1, the pin 6 of the single-chip microcomputer is grounded, and the pin 7 of the single-chip microcomputer connects described
The one end of resistance R2 one end, clock crystal X1 pin 1 and electric capacity C2, the pin 8 of the single-chip microcomputer is connected to described
One end of the resistance R2 other end, clock crystal X1 pin 4 and electric capacity C3, pin 2, the clock of the clock crystal X1 is brilliant
The other end ground connection of body X1 pin 3, the electric capacity C2 other end and electric capacity C3；The other end of the resistance R3 connects institute respectively
Electric capacity C4 one end and resistance R4 one end are stated, the resistance is connected respectively after single-chip microcomputer pin 9 and pin 10 parallel connection
One end of R4 one end, the resistance R3 other end and electric capacity C4, the other end of the resistance R4 is connected to the terminal cover plate
Fixture, the electric capacity C4 the other end ground connection, the pin 11 and pin 12 of the single-chip microcomputer are connected to the mainboard.
2. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：The power supply
Module includes diode D1, diode D2 and battery, and the anode of the diode D1 is connected to motherboard power supply, the electric power storage
Pond is connected to the anode of the diode D2, is connected respectively after the negative electrode parallel connection of the negative electrode and diode D2 of the diode D1
One end of one end of the resistance R1, the pin 5 of single-chip microcomputer and resistance R3.
3. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：The power supply
Module also includes electric capacity C5 and electric capacity C6, and the diode is connected to after described electric capacity C5 one end and the parallel connection of electric capacity C6 one end
D1 negative electrode and diode D2 negative electrode, are grounded after the other end parallel connection of the other end and electric capacity C6 of the electric capacity C5.
4. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：Also include quiet
Electric protective device, the electrostatic protection device is connected to the pin 9 and pin 10 of single-chip microcomputer.
5. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：Also include one
Serial ports JP1, the pin 11 and pin 12 of the single-chip microcomputer are connected to the mainboard by serial ports JP1.
6. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：The monolithic
Machine is MSP430FR2111.
7. it is as claimed in claim 1 a kind of for detecting that terminal opens or closes the device of lid in real time, it is characterised in that：Two pole
Pipe D1 is Schottky diode, and the diode D2 is Schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620696.1A CN107219803B (en) | 2017-07-27 | 2017-07-27 | Device for detecting opening or closing of terminal cover in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620696.1A CN107219803B (en) | 2017-07-27 | 2017-07-27 | Device for detecting opening or closing of terminal cover in real time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107219803A true CN107219803A (en) | 2017-09-29 |
| CN107219803B CN107219803B (en) | 2024-03-26 |
Family
ID=59953762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710620696.1A Active CN107219803B (en) | 2017-07-27 | 2017-07-27 | Device for detecting opening or closing of terminal cover in real time |
Country Status (1)
| Country | Link |
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| CN (1) | CN107219803B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109344106A (en) * | 2018-12-07 | 2019-02-15 | 福建升腾资讯有限公司 | A kind of plug-in and pull-off device monitoring storage hard disk in real time |
| CN110569679A (en) * | 2019-10-08 | 2019-12-13 | 福建实达电脑设备有限公司 | Cover-detaching self-destruction circuit for terminal and control method thereof |
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| CN110569679A (en) * | 2019-10-08 | 2019-12-13 | 福建实达电脑设备有限公司 | Cover-detaching self-destruction circuit for terminal and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107219803B (en) | 2024-03-26 |
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