CN202767646U

CN202767646U - Electronic coded key

Info

Publication number: CN202767646U
Application number: CN201220447661.5U
Authority: CN
Inventors: 高扬
Original assignee: Jiangsu IoT Research and Development Center
Current assignee: Jiangsu IoT Research and Development Center
Priority date: 2012-09-05
Filing date: 2012-09-05
Publication date: 2013-03-06
Anticipated expiration: 2022-09-05

Abstract

The utility model provides an electronic coded key comprising a wireless power receiving module, a control unit, a memory unit and a wireless communication module, wherein the output end of the wireless power receiving module is connected with the control unit and the wireless communication module. The control unit is connected with the memory unit and the wireless communication module. A code set by a user is written into the memory unit by means of a writing flash. The wireless power receiving module receives the electric energy provided by a wireless power emitting module in an electronic lock and supplies the electric energy to the electronic coded key, and the control unit reads the code memorized in the memory unit and transmits the code to the electronic lock through the wireless communication module. The electronic coded key has the advantages that the service life problem of a power supply does no need to be considered due to the adopted non-build-in-battery design, and meanwhile, the electronic coded key has an initial password protection function.

Description

A kind of Electronics Cryptographic Keys

Technical field

The utility model relates to a kind of electron key, is specifically related to a kind of electron key that utilizes the radio source power supply and have the password memory function.

Background technology

The key majority of existing electronic unlock is built-in supplying cell all, and the use of battery is stricter to environmental requirement, and low temperature environment can cause the electric weight of battery not enough, the impact effect of unblanking, and therefore the use with the unlock key of battery has been subject to certain limit value.In addition, for safety, electron key has generally all been fixed code data before dispatching from the factory, and the password in inconvenient later stage is revised, if lose key, also is difficult to crack out password.

Summary of the invention

Technical problem to be solved in the utility model is to propose a kind of internal battery power supply, repeatedly Modify password, safe and reliable Electronics Cryptographic Keys of need not.

The technical scheme that provides according to the utility model, described Electronics Cryptographic Keys comprises: radio source receiver module, control module, memory cell and wireless communication module, output connection control unit and the wireless communication module of described radio source receiver module, described control module connects memory cell and wireless communication module; Described memory cell adopts fever writes to write the password that access customer is set, the electric energy that provides from radio source transmitter module in the electronic lock is provided described radio source receiver module, power to Electronics Cryptographic Keys, password in the control module reading cells is sent to electronic lock by wireless communication module with password.

Described control module also is connected with the Tip element for prompting Electronics Cryptographic Keys duty, and the signal that wireless communication module reception electronic lock postbacks sends control module to, and control module sends cue to described Tip element.

Described radio source receiver module adopts radio source to receive special chip BQ51013, described control module adopts single-chip microcomputer C8051T606, the direct current 5V voltage of BQ51013 output arrives ground by the 3rd electric capacity, and the input of connection DC-DC chip TPS79333, TPS79333 output+3.3V voltage arrives ground by the 4th electric capacity, and the VCC pin of connection single-chip microcomputer C8051T606; The P0.2 of single-chip microcomputer C8051T606 and P0.3 pin are set to respectively serial data pin SDA and clock pin SCL, connect memory cell; The P0.4 of single-chip microcomputer C8051T606 and P0.5 pin are set to respectively send pin TX and receive pin RX, connect wireless communication module.

Described wireless communication module adopts wireless communication module JF24D-MCU, the PIN1 pin connection+3.3V power supply of JF24D-MCU, and the PIN2 pin connects the transmission pin TX of single-chip microcomputer C8051T606 respectively and receives pin RX, PIN4 pin ground connection with the PIN3 pin.

Described memory cell adopts ferroelectric memory FM24C64; the sheet choosing end ground connection of FM24C64; VSS holds ground connection; power end VDD is connected+the 5V power supply with hardware protection pin WP; 6 pins of FM24C64 link to each other with the clock pin SCL of single-chip microcomputer C8051T606, and 5 pins link to each other with the serial data pin SDA of single-chip microcomputer C8051T606.

The utility model has the advantages that: Electronics Cryptographic Keys of the present utility model adopts without battery design, need not to consider the power source life problem of key, and password need not the artificial memory, has simultaneously the original password defencive function.

Description of drawings

Fig. 1 is circuit structure block diagram of the present utility model.

Fig. 2 is radio source receiver module and control module circuit theory diagrams among Fig. 1.

Fig. 3 is wireless communication module pin connection layout among Fig. 1.

Fig. 4 is storage unit circuit schematic diagram among Fig. 1.

Fig. 5 is the workflow diagram of unblanking of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1, described a kind of Electronics Cryptographic Keys comprises radio source receiver module, control module, memory cell and wireless communication module, output connection control unit and the wireless communication module of described radio source receiver module, described control module connects memory cell and wireless communication module.Described control module also is connected with Tip element.

Be illustrated in figure 2 as radio source receiver module and control module circuit theory diagrams in the utility model.IC1 is the bq51013 of TI company, and bq51013 is that radio source receives special chip, can realize exporting direct current 5V voltage, and peripheral circuit connects simple, is illustrated in figure 2 as main pin and connects, and all the other pins all can connect with reference to the chip operation instruction that TI provides.The direct current 5V voltage of bq51013 output connects the DC-DC chip TPS79333 of capacitor C 3, output voltage 3.3V, TPS79333 output+3.3V connects the VCC pin of capacitor C 4 and single-chip microcomputer C8051T606.Single-chip microcomputer C8051T606 is the little encapsulation single-chip microcomputer of dragon company of Xinhua, can effectively reduce the volume of Electronics Cryptographic Keys, the P0.1 pin of single-chip microcomputer C8051T606 connects Tip element, P0.2 and P0.3 are set to respectively the SDA(serial data) and the SCL(clock) pin, connect memory cell, P0.4 and P0.5 are set to respectively TX(and send) and the RX(reception) pin, wireless communication module connected.

Fig. 3 is wireless communication module pin connection layout in the utility model, wireless communication module JF24D-MCU is the micro volume communication module of a collection 2.4G wireless receiving and dispatching and control, PIN1 connection+3.3V power supply, PIN2 connects the TX of single-chip microcomputer C8051T606, PIN3 connects the RX of single-chip microcomputer C8051T606, and PIN4 connects GND.

Fig. 4 is storage unit circuit schematic diagram in the utility model, and storage chip is selected technical grade ferroelectric memory FM24C64, and reading-writing life-span is 10,000,000,000 times, has hardware write-protection function.A0, A1, A2 are sheet choosing end, and the utility model only just can meet the demands with a slice memory, therefore A0, A1, the direct ground connection of A2.VSS is earth terminal; WP is the hardware protection pin; when WP connects high level; the above part in memory FM24C64 1/4th addresses is protected; the utility model directly links to each other it with+5V power supply; protected storage FM24C64 1/4th above addresses, this part is the password through cryptographic calculation, uses as password for subsequent use.6 pins link to each other with the SCL of single-chip microcomputer C8051T606, and 5 pins link to each other with the SDA of single-chip microcomputer C8051T606.

Described Tip element is conventional sound light alarming circuit, is not repeated at this.

Be illustrated in figure 5 as the workflow diagram of unblanking of the present utility model, the specific implementation step is as follows:

1. with the password of Electronics Cryptographic Keys by password fever writes programming user setting, store in the memory cell.In case adopting the advantage of password external memory is that control module damages, password still can be read by the user.

In supporting electronic password lock (function of preserving password and radio communication is arranged and have the radio source transmitter module) power-supply system under normal circumstances with Electronics Cryptographic Keys near electronic password lock, (described enough electric energy were to make receiving-end voltage stable when radio source transmitter module from corresponding electronic password lock provided enough electric energy when the radio source receiver module of Electronics Cryptographic Keys receives, and satisfy the voltage of control module normal operation), the control module of Electronics Cryptographic Keys will be to the Tip element transmitted signal, Tip element is placed correct by acousto-optic hint user Electronics Cryptographic Keys position, and has worked.If it is undesired that radio source receives, then Electronics Cryptographic Keys is without any prompting, and the user then needs Electronics Cryptographic Keys is reapposed, until can point out on the position of normal operation.

3. when Electronics Cryptographic Keys enters normal operating conditions, the password in the control module reading cells, and password sent by wireless communication module.

4. corresponding electronic password lock will carry out the password check and correction after receiving code data, if password is correct, then corresponding electronic password lock is unblanked, if password bad then sends error message, control module drives the Tip element prompting and unblanks unsuccessfully, need reenter and unblank.

Claims

1. Electronics Cryptographic Keys, it is characterized in that: comprise radio source receiver module, control module, memory cell and wireless communication module, output connection control unit and the wireless communication module of described radio source receiver module, described control module connects memory cell and wireless communication module; Described memory cell adopts fever writes to write the password that access customer is set, the electric energy that provides from radio source transmitter module in the electronic lock is provided described radio source receiver module, power to Electronics Cryptographic Keys, password in the control module reading cells is sent to electronic lock by wireless communication module with password.

2. Electronics Cryptographic Keys as claimed in claim 1, it is characterized in that, described control module also is connected with the Tip element for prompting Electronics Cryptographic Keys duty, the signal that wireless communication module reception electronic lock postbacks sends control module to, and control module sends cue to described Tip element.

3. Electronics Cryptographic Keys as claimed in claim 1, it is characterized in that, described radio source receiver module adopts radio source to receive special chip BQ51013, described control module adopts single-chip microcomputer C8051T606, the direct current 5V voltage of BQ51013 output arrives ground by the 3rd electric capacity (C3), and the input of connection DC-DC chip TPS79333, TPS79333 output+3.3V voltage arrives ground by the 4th electric capacity (C4), and the VCC pin of connection single-chip microcomputer C8051T606; The P0.2 of single-chip microcomputer C8051T606 and P0.3 pin are set to respectively serial data pin SDA and clock pin SCL, connect memory cell; The P0.4 of single-chip microcomputer C8051T606 and P0.5 pin are set to respectively send pin TX and receive pin RX, connect wireless communication module.

4. Electronics Cryptographic Keys as claimed in claim 3, it is characterized in that, described wireless communication module adopts wireless communication module JF24D-MCU, the PIN1 pin connection+3.3V power supply of JF24D-MCU, the PIN2 pin connects the transmission pin TX of single-chip microcomputer C8051T606 respectively and receives pin RX, PIN4 pin ground connection with the PIN3 pin.

5. Electronics Cryptographic Keys as claimed in claim 3; it is characterized in that; described memory cell adopts ferroelectric memory FM24C64; the sheet choosing end ground connection of FM24C64; VSS holds ground connection; power end VDD is connected+the 5V power supply with hardware protection pin WP, and 6 pins of FM24C64 link to each other with the clock pin SCL of single-chip microcomputer C8051T606, and 5 pins link to each other with the serial data pin SDA of single-chip microcomputer C8051T606.