CN102789564A

CN102789564A - Secret key

Info

Publication number: CN102789564A
Application number: CN2011101297454A
Authority: CN
Inventors: 徐光尧
Original assignee: Shandong Linglong Electromechanical Co Ltd
Current assignee: Shandong Linglong Electromechanical Co Ltd
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-11-21

Abstract

The invention relates to a secret key which is an electronic device; a hardware of the electronic device is formed by a singlechip taken as a main body and a software of the electronic device is a C language, wherein P1.0 and P1.1 of the singlechip (16) are respectively connected with a data optical coupler (12) and synchronous optical coupler (10) and then finally connected to a nine-pin serial port (2); the P1.1 is simultaneously connected with a synchronous signal indicator light (7); the nine-pin serial port is connected with a common I/O (Input/Output) port of a PLC (Programmable Logic Controller); press keys (3) are mutually connected with the P3.2 of the singlechip (16); so a process for inputting a password is invisible; even the password is leaked, the password can not be input without the device; the password is convenient and quick to be changed; and the secrete key is particularly used in equipment and a technology needing setting the password in an industrial application.

Description

Key

Technical field:

The present invention relates to a kind of key, particularly a kind of key.

Background technology:

At present; China some important technical parameter of equipment and device systems parameter in commercial Application all are to accomplish change through various man-machine interfaces (like touch-screen), and common this change is to be changed through the form that password lands according to equipment and arts demand by the personnel that mandate is arranged, but password is very easy to leaked; As being seen by no donor in the input process and writing down or obtain through other undesired means; And in case quilt is revealed, unauthorized people will gently then cause equipment failure through changing some individual purposes that some parameter reaches them; Heavy then cause the quality of lot accident, bring heavy losses to enterprise.

Summary of the invention:

Even the object of the invention will provide the invisible password of input process of a kind of new password input mode, password to leak as not having that this device also can't be imported and change of secret code key conveniently.

The objective of the invention is to realize like this: a kind of key; By single-chip microcomputer is that main body constitutes hardware; The C language is characterized in that as the electronic installation that software constituted: the P1.0 of single-chip microcomputer links to each other with data optocoupler, synchronous optocoupler respectively with P1.1 and finally is connected to nine needles serial port, and P1.1 connects the synchronizing signal pilot lamp simultaneously; Nine needles serial port is connected with the common I/O mouth of PLC, and button links to each other with the P3.2 of single-chip microcomputer.

Described single-chip microcomputer adopts the AT89S52 single-chip microcomputer.

Described single-chip microcomputer connects charging indicator light, and charging indicator light passes through mu balanced circuit and connects filter capacitor, and filter capacitor connects charging socket through commutation diode, and mu balanced circuit is connected to form by the B utmost point of the resistance potential-divider network of forming and the triode that charges.

Described single-chip microcomputer is connected with the B utmost point that lighting circuit drives triode, and the C utmost point that lighting circuit drives triode is connected with light emitting diode, and its E utmost point connects current-limiting resistance.

The P1.0 pin of described single-chip microcomputer is connected with the start pilot lamp, and its 9th pin is connected with reset capacitance.

The present invention compared with prior art has the following advantages:

Also finally be connected to nine needles serial port owing to adopted the P1.0 of single-chip microcomputer to link to each other with data optocoupler, synchronous optocoupler respectively with P1.1; P1.1 connects the synchronizing signal pilot lamp simultaneously; Nine needles serial port is connected with the common I/O mouth of PLC; The version that button links to each other with the P3.2 of single-chip microcomputer; Thereby this device can't not imported yet and change of secret code is convenient and swift as having even the invisible password of the input process of password leaks, and can contain the problem that the production run password is prone to let out, technological parameter is easily modified effectively.

Description of drawings:

Figure: be concrete structure synoptic diagram of the present invention

1, charging socket 2, nine needles serial port 3, button 4., light emitting diode 5, start pilot lamp 6, charging indicator light 7, synchronizing signal pilot lamp 8, charging triode, 9. lighting circuit drives triode 10, filter capacitor 11, optocoupler 12, data optocoupler 13, current-limiting resistance 14, resistance 15, reset capacitance 16, single-chip microcomputer 17, mounting hole 18, commutation diode synchronously

Embodiment:

Charging socket 1 is connected with commutation diode 18, and commutation diode 18 connects filter capacitors 10 and carries out filtering, the B utmost point that filter capacitor 10 connects resistance 14 potential-divider network of forming and the triode 8 that charges be connected form mu balanced circuit; The E utmost point of charging triode 8 is connected with single-chip microcomputer 16 through charging indicator light 6, and its C utmost point is connected with commutation diode 18, and single-chip microcomputer 16 adopts the AT89S52 single-chip microcomputer; Its P1.0 is connected with data optocoupler 12, synchronous optocoupler 11 respectively with P1.1; P1.1 connects synchronizing signal pilot lamp 7 simultaneously, is connected in nine needles serial port 2 after linking to each other, and button 3 links to each other with the P3.2 of single-chip microcomputer 16; Three high brightness LEDs 4 are connected with the C utmost point that lighting circuit drives triode 9; The E utmost point that lighting circuit drives triode 9 connects current-limiting resistance 13 in order to current limliting, and its B utmost point connects single-chip microcomputer 16, and start pilot lamp 5 links to each other with the P1.0 pin of single-chip microcomputer 16; Reset capacitance 15 is connected with the 9th pin of single-chip microcomputer 16, and 17 is mounting hole.

During use, the AT89S52 single-chip microcomputer is as main control chip, and C programmes, and the P0.0 of single-chip microcomputer is a data port; P0.1 is the synchronizing signal mouth, all passes through optocoupler and links to each other with nine needles serial port, and button is connected with P3.2; Key is pressed back P3.2 and is become low level, when input during password data bit under the disconnected synchronizing pulse effect of the logical 30ms of 40ms (1ms=1/1000S), among the CPU that the I/O mouth through the PLC that links to each other with nine needles serial port is sent into data fast; Long button 3 seconds, the start pilot lamp lights, and key starts; The time of pushing button was longer than 1 second, and key then begins to send code data to PLC, the synchronizing signal pilot lamp flicker of this moment, if pilot lamp does not dodge and explains that then the I/O point does not connect unusually, password can not normal transmission, and the password transmission synchronous signal lamp that finishes extinguishes; Rapid Continuous press twice buttons then three high brightness LEDs of front end light, can be used as illumination and using, press lamp again and extinguish; Long button surpasses 3 seconds, or do not make lighting condition do not carry out in following 2 minutes key operation then key automatically shutdown to save electric energy.

Claims

1. key; By single-chip microcomputer is that main body constitutes hardware; The C language is characterized in that as the electronic installation that software constituted: the P1.0 of single-chip microcomputer (16) links to each other with data optocoupler (12), synchronous optocoupler (10) respectively with P1.1 and finally is connected to nine needles serial port (2), and P1.1 connects synchronizing signal pilot lamp (7) simultaneously; Nine needles serial port is connected with the common I/O mouth of PLC, and button (3) links to each other with the P3.2 of single-chip microcomputer (16).

2. key according to claim 1 is characterized in that described single-chip microcomputer (16) adopts the AT89S52 single-chip microcomputer.

3. key according to claim 1 and 2; It is characterized in that described single-chip microcomputer (16) connects charging indicator light (6); Charging indicator light (6) connects filter capacitor (10) through mu balanced circuit, and filter capacitor (10) connects charging socket (1) through commutation diode (18).

4. key according to claim 3 is characterized in that described mu balanced circuit is connected to form by the B utmost point of resistance (14) potential-divider network of being formed and the triode (8) that charges.

5. key according to claim 1 is characterized in that described single-chip microcomputer (16) is connected with the B utmost point that lighting circuit drives triode (9), and the C utmost point that lighting circuit drives triode (9) is connected with light emitting diode (4), and its E utmost point connects current-limiting resistance (13).

6. key according to claim 1 is characterized in that the P1.0 pin of described single-chip microcomputer (16) is connected with start pilot lamp (5), and its 9th pin is connected with reset capacitance (15).