CN2653090Y - Anti-theft alarm device for safe - Google Patents
Anti-theft alarm device for safe Download PDFInfo
- Publication number
- CN2653090Y CN2653090Y CN 200320110986 CN200320110986U CN2653090Y CN 2653090 Y CN2653090 Y CN 2653090Y CN 200320110986 CN200320110986 CN 200320110986 CN 200320110986 U CN200320110986 U CN 200320110986U CN 2653090 Y CN2653090 Y CN 2653090Y
- Authority
- CN
- China
- Prior art keywords
- microprocessor
- key
- mems acceleration
- strongbox
- acceleration transducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a strongbox theftproof alarm device which is characterized in that a MEMS acceleration sensor is used to induce the moving status of the strongbox and the key structure, and a judgment of the validity of the event is made by a microprocessor after the characteristics of the movement is obtained. The main technical proposal is to install a MEMS acceleration sensor in the key; and a microprocessor, a LCD module, a code memorizer, an electro-magnetic relay, a buzzer, a keyboard, and a key socket are installed in the strongbox; wherein, the output of the MEMS acceleration sensor is connected with the microprocessor through the key socket, the output of the microprocessor is connected with the LCD module, the code memorizer, the electro-magnetic relay and the buzzer are connected with the microprocessor respectively. After using the new type of theftproof lock, the password is complicated to be cecoded and is easy to change, and a special key is needed to open the lock, thereby increasing the safety property.
Description
Technical field
The utility model relates to a kind of novel strongbox burglar alarm, and its main feature is to utilize the MEMS acceleration transducer to respond to the motion state of strongbox, key mechanism, obtains this motion characteristics, and is judged the legitimacy of this incident by microprocessor.
Background technology
Along with the science and technology and the continuous development of social productive forces, the improving constantly of people's living standard, after people lived and worked in peace and contentment, the burglar alarm problem of society became increasingly conspicuous, and had become the focus of people's care.Unit, family, individual's the stolen phenomenon of valuable property often has generation.Therefore the purposes of burglar alarm is more and more wider.The electronic cipher thief-resistant safe is simple to operate, and change of secret code is convenient, do not need to be used with key, but password will not have any antitheft effect in case stolen by other people, be used for the temporary keeping of hotel, the supermarket personal effects more.Mechanical cipher thief-resistant safe operation more complicated, password can not be changed, and needs to be used with key, and anti-theft effect is better, is used for the permanent keeping of enterprise's valuables more.
Summary of the invention
The purpose of this utility model is to design a kind of strongbox burglar alarm, utilize this theftproof lock after, the password complexity is difficult for cracking, and can change at any time, need to unblank private key to cooperate, thus the safety that has improved strongbox.
According to design scheme provided by the utility model, the MEMS acceleration transducer is set in key, microprocessor and key socket are set in strongbox, wherein the output of MEMS acceleration transducer utilizes key socket to be connected with microprocessor.
The output of microprocessor is connected with electromagnetic relay.The input of LCD MODULE is connected with microprocessor.Encryption memory is connected with microprocessor.The output of keyboard is connected with microprocessor.The input of buzzer is connected with microprocessor.
Micro-electronic mechanical system technique (MEMS): MEMS has developed emerging high-tech rapidly since the later stage eighties in the world.MEMS is the microsystem that is made of micro mechanical structure and microelectronic integrated circuit, and it can reality interrelate with the world by the interface microelectronic component, and natural informations such as sound, light, heat, magnetic, motion are carried out perception, identification, control and processing.The main feature of MEMS is microminiaturization, multiplicity and microelectronics technology.In the utility model, the acceleration transducer that is hidden in the key utilizes the manufacturing of MEMS technology.
Microprocessor technology (MCU): MCU is a kind of IC chip that integrated level is very high that parts utilization advanced persons' such as computing, control, I/O manufacturing process is made.In the utility model, microprocessor analysis handle acceleration transducer output data, with setting data relatively, judge whether normally to unblank.
The MEMS acceleration transducer is the integrated-optic device that can measure object static angular position.By physics principle as can be known, object static state will be subjected to the effect of the power of a plurality of directions when placing, as gravity, stiction etc.The MEMS acceleration transducer has a reference axial direction, be called sensitive axis to.MEMS acceleration transducer induction acceleration of gravity its sensitive axis to component.Promptly when acceleration of gravity direction and its sensitive axis when becoming a certain angle of cut α, the MEMS acceleration transducer is exported the signal that the angle of cut therewith becomes cosine relation.
Single sensitive axis to the MEMS acceleration transducer can only respond to the one dimension angle of inclination, be it can only judge 180 ° on a circumference left side or right 180 ° with interior position, therefore must use pair sensitive axis could determine position on the whole circumference to the acceleration transducer of (X sensitive axis to Y sensitive axis to).At present, two sensitive axis to acceleration transducer be main product on the market, as the MX series that MEMSIC company produces, the ADXL series that ADI company produces etc.
The Mathematical Modeling of acceleration transducer is:
V
OUT(α)V
OUT(0°)+Sensitivity*Cos(α)
Wherein, V
OUT(0 °) is the output signal of sensitive axis when being horizontal of MEMS acceleration transducer.
Sensitivity is the sensitivity of MEMS acceleration transducer, its implication be sensitive axis to the every variation of acceleration 1g, the variation of output signals amount, unit is the pulse width variations %/g of PWM.
The principle that the utility model utilizes the MEMS acceleration transducer can measure acceleration of gravity is obtained the rotary course and the positional information of key.According to the operating principle of MEMS acceleration transducer, can induce the state that rotatablely moves of the object that attaches to sensor by the signal of sensor generation.Can replace original mechanical code lock complex mechanical construction with a MEMS acceleration transducer like this, and increase the function of revising password at any time; With respect to the ordinary electronic coded lock, its password complexity increases greatly, and must cooperate just with special key and can unblank, and anti-theft feature is strengthened greatly.
The operating principle of this device is as follows:
The P1-3 of microprocessor AT89C52, P1-4 is used to receive the output signal of MEMS acceleration transducer, and the output signal of MEMS acceleration transducer is the real time position signal of key, is handled by MCU, the correctness of authentication password, and export the control signal of opening safety case or warning by MCU.
Can judge the residing location status of key according to the output signal of MEMS acceleration transducer, circumference is divided into subregions such as 8, each password definition is a three-dimensional array password[a] [b] [c], the numeric representation rotating cycle of a wherein, the numeric representation direction of rotation of b, the numeric representation position of c.In this design, the probability of unblanking=1/ (256*2*8) of 6 passwords
6≈ 1/4.7*10
21This probability is that existing cipher anti theft institute is inaccessible.
Description of drawings
Fig. 1 is a circuit block diagram.
Fig. 2 is circuit theory diagrams.
The specific embodiment
As shown in the figure: in key, establish MEMS acceleration transducer 1, microprocessor 2, LCD MODULE 3, encryption memory 4, electromagnetic relay 5, buzzer 6, keyboard 7, key socket 8 are set in safety cabinet inside, wherein the output of MEMS acceleration transducer 1 connects with microprocessor 2 by key socket 8, the output of microprocessor 2 is connected with LCD MODULE 3, and data storage 4, electromagnetic relay 5, buzzer 6 are connected with microprocessor 2 respectively.
MEMS acceleration transducer 1 (model MXD2125), microprocessor 2, LCD MODULE 3 (LCD Module), encryption memory 4 (model AT24C01), electromagnetic relay 5, buzzer 6 are external member.
Claims (6)
1, strongbox burglar alarm, it is characterized in that: MEMS acceleration transducer (1) is set in key, microprocessor (2) and key socket (8) are set in strongbox, and wherein the output of MEMS acceleration transducer (1) utilizes key socket (8) to be connected with microprocessor (2).
2,1 described warning device as requested, it is characterized in that: the output of microprocessor (2) is connected with electromagnetic relay (5).
3,1 described warning device as requested, it is characterized in that: the input of LCD MODULE (3) is connected with microprocessor (2).
4,1 described warning device as requested, it is characterized in that: encryption memory (4) is connected with microprocessor (2).
5,1 described warning device as requested, it is characterized in that: the output of keyboard (7) is connected with microprocessor (2).
6,1 described warning device as requested, it is characterized in that: the input of buzzer (6) is connected with microprocessor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320110986 CN2653090Y (en) | 2003-11-18 | 2003-11-18 | Anti-theft alarm device for safe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320110986 CN2653090Y (en) | 2003-11-18 | 2003-11-18 | Anti-theft alarm device for safe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2653090Y true CN2653090Y (en) | 2004-11-03 |
Family
ID=34344009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320110986 Expired - Lifetime CN2653090Y (en) | 2003-11-18 | 2003-11-18 | Anti-theft alarm device for safe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2653090Y (en) |
-
2003
- 2003-11-18 CN CN 200320110986 patent/CN2653090Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131118 Granted publication date: 20041103 |