CN116206391A - Function encryption safety lock and control method thereof - Google Patents

Abstract

The invention discloses a function-encrypted safety lock and a control method thereof, wherein the function-encrypted safety lock comprises a lock body, a lock tongue seat, a lock tongue, a keyboard and a display screen; the lock body is internally provided with a controller, a battery and a buzzer; the motor is used for driving the lock tongue to linearly reciprocate; the controller is provided with a mathematical function for encryption and a definition domain thereof; the controller is used for randomly generating independent variables, displaying the independent variables on the display screen, comparing the passwords input by the keyboard with the dependent variables, and controlling the rotation of the motor according to the comparison result. When in actual use, the generated independent variables are different, and the password is also different when the lock is unlocked each time; namely, other people peep to the password input by the user on the keyboard, and unlocking cannot be completed next time. Even if both the value of the argument displayed on the display terminal and the password entered by the keyboard are peeped, the function for encryption cannot be deduced back.

Description

Function encryption safety lock and control method thereof

Technical Field

The invention relates to the technical field of electronic locks, in particular to a function-encrypted safety lock and a control method thereof.

Background

Compared with the traditional mechanical lock, the electronic lock has the characteristics of being safer and more convenient, and the like, and the application range of the electronic lock is wider and wider. However, the security and convenience of the electronic locks of the prior art still have disadvantages: (1) To disguise the password, the user typically may enter an interference code before entering the correct password; but also normally left-look right, hand or body occlusion; (2) To prevent the password from being stolen, users generally need to frequently modify the password, which is a natural annoyance. However, the convenience of the electronic lock is greatly reduced by adopting the two methods, and the password is still easily stolen by some 'careful people'. This is mainly due to the fact that the unlocking logic of the existing electronic lock has defects, namely: and comparing the input password with the set password, and unlocking if the password is correct. Because the numbers input by the user contain the passwords (for example, 6 digits), even if the user inputs the interference codes, the user is not helped, and other people can find the correct passwords through multiple times of peeping and comparison.

In view of the technical problems, the function-encrypted safety lock and the control method thereof improve unlocking logic of the electronic lock, and greatly improve safety of the electronic lock on the premise of not changing cost of the electronic lock. The function encryption safety lock and the control method thereof can be widely applied to schools, libraries and other units, for example: multimedia classrooms (used for teaching of various disciplines such as mathematics and Chinese), voice rooms (used for English teaching and the like), microcomputer rooms, data rooms and other occasions with certain requirements on safety.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a function-encrypted security lock and a control method thereof, which aim to solve the technical problems of the prior art that the security and convenience of the electronic lock are to be improved.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the function-encrypted safety lock comprises a lock body, a lock tongue seat, a lock tongue, a keyboard and a display terminal, wherein the display terminal comprises a display screen, and a controller, a battery and a buzzer are arranged in the lock body; the keyboard, the motor, the battery and the buzzer are respectively and electrically connected with the controller; the motor is used for driving the lock tongue to linearly reciprocate; the controller is provided with a mathematical function for encryption and a definition domain thereof; the controller is used for randomly generating independent variables, displaying the independent variables on the display screen, comparing the passwords input by the keyboard with the dependent variables, and controlling the rotation of the motor according to the comparison result.

Further, in the function-encrypted security lock, the mathematical function is a unitary primary function.

Further, in the function encryption safety lock, a spindle of the motor is connected with a screw rod, a screw rod nut is arranged on the screw rod, and the lock tongue is connected with the screw rod nut.

Further, in the function-encrypted safety lock, a first Hall sensor and a second Hall sensor are arranged in the lock body, and the first Hall sensor and the second Hall sensor are respectively and electrically connected with the controller; the screw nut is connected with a straight rod, and a magnet is arranged at one end of the straight rod corresponding to the Hall sensor.

Further, in the function-encrypted safety lock, a distance sensor is arranged at the end of the lock body facing the lock tongue; the distance sensor is electrically connected with the controller.

Preferably, in the function encryption security lock, the keyboard is provided with 0-9 number keys, a decimal point key, a delete key, a confirm key, an unlock key and a reset key.

Preferably, the controller is a single-chip microcomputer.

The invention correspondingly provides a control method of the function encryption safety lock, which comprises the following steps:

s1, setting a mathematical function for encryption and a definition domain thereof in a controller;

s2, pressing an unlocking key on a keyboard, and starting an unlocking program;

s3, the controller randomly generates a new independent variable and displays the new independent variable on the display screen;

s4, inputting a password through a keyboard, and pressing a confirmation key;

s5, the controller compares the password input in the step S4 with the dependent variable corresponding to the independent variable in the step S3, and if the password is correct, the step S6 is executed; if the password is wrong, then re-executing the step S3;

s6, sounding the buzzer once; the motor rotates to drive the lock tongue to withdraw from the lock tongue seat; when the first Hall sensor detects the magnet, the motor stops rotating to finish unlocking;

s7, when locking is needed, aligning the lock body and the lock tongue seat; when the distance sensor detects the lock tongue seat, a reset key is pressed down; the motor reverses to drive the lock tongue to extend into the lock tongue seat; when the second hall sensor detects the magnet, the motor stops rotating.

Further, in step S5, if the password is input three times continuously, the buzzer sounds for a long time, and the program locks the time T; and after the time passes, the program is automatically reset.

The beneficial effects are that: compared with the prior art, the function-encrypted safety lock and the control method thereof at least have the following advantages: (1) The generated independent variable is different each time, and the password is also different each time the lock is unlocked; namely, other people peep to the password input by the user on the keyboard, and unlocking cannot be completed next time. (2) Even if both the value of the argument displayed on the display terminal and the password entered by the keyboard are peeped, the function for encryption cannot be deduced back. (3) Compared with the existing electronic lock, the cost is the same, but the safety is greatly improved.

Drawings

Fig. 1 is a front view of a function encrypted security lock provided by the present invention.

Fig. 2 is a schematic diagram of an internal structure of a function-encrypted security lock according to the present invention, which is in a locked state.

Fig. 3 is a schematic diagram of an internal structure of the function-encrypted security lock according to the present invention, which is in an unlocked state.

Fig. 4 is a partial enlarged view of the region S in fig. 2.

FIG. 5 is a control flow diagram of the function encrypted security lock provided by the present invention.

Detailed Description

The invention provides a function encryption safety lock and a control method thereof, which are used for making the purposes, technical schemes and effects of the invention clearer and clearer, and are further described in detail below. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 to 4, the present invention provides a function encryption security lock and a control method thereof. The drawings are only for the purpose of illustrating the structural principles and are not to scale with respect to actual products. The drawings only show the structure related to the invention, and the conventional structure of the electronic lock is not specifically shown. Fig. 2 and 3 do not show a panel (keyboard, display, etc.) portion for facilitating the viewing of the lock body internal structure. The drawings only schematically show a circuit board, and no specific circuit diagram is shown, because the circuit connection relationship between each element and the singlechip in the invention is not the invention point of the application.

The function-encrypted safety lock comprises a lock body 11, a lock tongue seat 12, a lock tongue 19, a keyboard 13 and a display terminal, wherein the display terminal comprises a display screen 14; the lock body is internally provided with a controller 21, a battery 22 and a buzzer 29; the keyboard, the motor, the battery and the buzzer are respectively and electrically connected with the controller; the motor is used for driving the lock tongue to linearly reciprocate; the controller is provided with a mathematical function for encryption and a definition domain thereof; the controller is used for randomly generating independent variables, displaying the independent variables on the display screen, comparing the passwords input by the keyboard with the dependent variables, and controlling the rotation of the motor according to the comparison result.

When in actual installation, the lock body is installed on the door plate, and the lock tongue seat is installed on the door frame.

The controller can be a single-chip microcomputer, preferably an STC8G single-chip microcomputer, and compared with the traditional 8051 single-chip microcomputer, the single-chip microcomputer is faster in operation speed, has functions of an R/C clock and the like integrated therein, and does not need to be provided with an external crystal oscillator and an external reset circuit.

Preferably, the mathematical function is a unitary once-function. The unitary primary function is simple to calculate, so that the actual operation is convenient; in addition, because the definition field which can be practically used is wide, repeated independent variables do not appear in use. Of course, other types of mathematical functions are possible, such as, for example, a unitary quadratic function, a binary linear function, and so forth.

Further, a spindle 231 of the motor is connected to a screw rod 31, a screw rod nut 32 is arranged on the screw rod, and the lock tongue is connected with the screw rod nut. That is, the screw rod is rotatably connected with the lock body, and when the spindle drives the screw rod to rotate, the screw rod does not linearly move, and the screw rod nut linearly moves. The screw nut drives the lock tongue to move forwards and extend into the lock tongue seat so as to realize locking; the screw nut drives the bolt to move backwards to withdraw from the bolt seat, so that unlocking is realized. The drawings only schematically illustrate a bolt, and in practical applications, the structure of the bolt may be varied.

Further, in order to further ensure the travel of the lock tongue and avoid collision, the following settings may be made: the lock body is internally provided with a first Hall sensor 241 and a second Hall sensor 242 which are respectively and electrically connected with the controller; the screw nut is connected with a straight rod 41, and the end of the straight rod corresponding to the Hall sensor is provided with a magnet 42. Namely: in the locking process, when the magnet is sensed by the second Hall sensor, the motor stops rotating; in the unlocking process, when the magnet is sensed by the first Hall sensor, the motor stops rotating.

Please continue to refer to fig. 2-4. As can be seen from the drawings, the spindle of the motor is fixedly connected with the screw rod. The motor drives the screw rod to rotate and the screw rod does not linearly move; the screw nut is linearly moved without rotation. The bolt is connected to the screw nut and the screw nut moves linearly so as to be inserted into the cavity 120 in the bolt housing or retracted from the bolt housing. As shown in fig. 3, the locking bolt is provided with a blind hole 190 to facilitate the insertion of the screw into the locking bolt without interference from the locking bolt.

At this time, as shown in fig. 2, the second hall sensor detects the magnet, the motor stops rotating, and the locking bolt is inserted into the locking bolt seat to be in a locking state. At this time, as shown in fig. 3, the first hall sensor detects the magnet, the motor stops rotating, and the lock tongue exits the lock tongue seat and is in an unlocking state.

Further, the end of the lock body facing the lock tongue is provided with a distance sensor 25; the distance sensor is electrically connected with the controller. The distance sensor is used for detecting the distance between the lock body and the lock tongue seat so that a user can perform locking operation.

The display screen can be arranged in various ways, and the following three schemes (but not limited thereto) are provided: scheme 1, the display screen is direct to be set up in the front of lock body, electric connection between display screen and the singlechip. The device has simple structure and is very convenient to operate. Scheme 2, the display screen is the display screen of smart mobile phone, and the smart mobile phone passes through bluetooth to be connected with the singlechip, promptly: the intelligent mobile phone is provided with a Bluetooth module, and the lock body is also internally provided with the Bluetooth module, so that the mobile phone and the singlechip are connected in a Bluetooth mode when unlocking is needed. The screen of the smart phone is used for a display screen when unlocking, and the keyboard on the lock body is used for an input device when unlocking. The cost of the display terminal is saved, and in actual operation, the controller sends the value of the independent variable generated randomly to the mobile phone, so that the value is not easy to be peeped by others. Scheme 3, make an independent display terminal to the display screen, this display terminal includes the casing, is provided with the display screen on the casing, is provided with battery and bluetooth module in the casing, and this setting also can realize that display terminal passes through bluetooth with the singlechip and is connected.

Preferably, as shown in fig. 1, the keypad is provided with 0 to 9 number keys, a decimal point key, a delete key, a confirm key, an unlock key, and a reset key.

Referring to fig. 5, the present invention correspondingly provides a method for controlling a function-encrypted security lock, which includes the following steps:

s1, setting a mathematical function for encryption and a definition domain thereof in a controller;

s2, when unlocking is needed, the display terminal is connected with a controller of the safety lock in a Bluetooth mode;

s2, pressing an unlocking key on a keyboard, and starting an unlocking program;

s3, the controller randomly generates a new independent variable and displays the new independent variable on the display screen;

s4, inputting a password through a keyboard, and pressing a confirmation key;

s5, the controller compares the password input in the step S4 with the dependent variable corresponding to the independent variable in the step S3, and if the password is correct, the step S6 is executed; if the password is wrong, re-executing the step S3;

s6, sounding the buzzer once; the motor rotates to drive the lock tongue to withdraw from the lock tongue seat; when the first Hall sensor detects the magnet, the motor stops rotating to finish unlocking;

s7, when the door needs to be locked, the lock body and the lock tongue seat are aligned (namely, the door is closed); when the distance sensor detects the lock tongue seat, a reset key is pressed down; the motor reverses to drive the lock tongue to extend into the lock tongue seat; when the second hall sensor detects the magnet, the motor stops rotating.

Further, in step S5, if the password is input three times continuously, the buzzer sounds for a long time, and the program locks the time T; after three minutes the program was automatically reset. Preferably, the T time is preferably 1 to 10 minutes.

Through setting up distance sensor, ensure only can lock under the door closing state to avoid the mistake touching under the door opening state to lead to unexpected locking.

For ease of understanding, the following description is given of one embodiment.

The mathematical function provided in the controller is preferably a unitary linear function, such as: y=x+ 100000.1 (not limited to this in practice); the definition field of the function (i.e., the range of the value of the argument x) is set to an integer of 0 to 999999 (this is not a limitation in practical applications). When unlocking is needed, the mobile phone and the safety lock are connected through Bluetooth. Pressing the confirmation key on the keyboard initiates the unlocking procedure. Each time an unlock occurs, the controller randomly generates an argument, such as: 789, the controller sends "789" to the display screen of the display terminal. The user looks at the numbers on the display screen at a glance, then calculates (if the setting function is relatively simple, the calculation can be directly performed) to obtain y=100000.1+789= 100789.1, the user inputs 100789.1 on the keyboard, then presses the confirmation key, the controller compares 100789.1 input by the keyboard with the strain amount corresponding to the independent variable '789' (i.e. 100789.1), the two are equal, the controller controls the motor to rotate, and the lock tongue withdraws from the lock tongue seat to finish unlocking. When unlocking, even if the password is peeped to '100789.1', the password cannot be leaked, because when unlocking is performed next time, even if other people try to unlock, the independent variable randomly generated by the controller is no longer '789', and unlocking cannot be completed by inputting '100789.1' again.

In practical application, a plurality of unitary functions can be constructed, so that each security lock is guaranteed to have different functions for encryption, and the requirements of different users are met.

Steps S4 and S5 may be further optimized for further safety. Namely: s4, inputting a password through a keyboard, and pressing a confirmation key; the password comprises an interference code. S5, the controller compares the password input in the step S4 with the dependent variable corresponding to the independent variable in the step S3, and if the password input in the step S4 contains the dependent variable corresponding to the independent variable in the step S3, the password is considered to be correct, and the step S6 is executed; if the password input in step S4 does not include the dependent variable corresponding to the argument in step S3, the password is considered to be incorrect, and step S3 is executed again.

Still further to the above embodiments, the value of the argument received at the display terminal is "789", and the user inputs the password including the interference code, for example, "7456100789.1" (or "789987100789.1", "100100789.1001" or other digits), and then confirms. The controller compares the password '7456100789.1' and the variable '100789.1' input by the keyboard, the password '7456100789.1' input by the user comprises the character '100789.1', the password is correctly input, and the motor rotates to finish unlocking. Because the input numbers contain interference codes, even if the display terminal is directly arranged outside the lock body, even if other people peep the numbers on the display terminal and the numbers input by the user on the keyboard, the set mathematical functions cannot be reversely deduced. In practical application, the self-confidence of the user is greatly improved, the password can be input 'bright and big' without shielding and masking when unlocking each time, and peeping by other people is prevented.

According to the analysis, compared with the prior art, the function encryption safety lock and the control method thereof provided by the application at least have the following advantages: (1) The generated independent variable is different each time, and the password is also different each time the lock is unlocked; namely, other people peep to the password input by the user on the keyboard, and unlocking cannot be completed next time. (2) Even if both the value of the argument displayed on the display terminal and the password entered by the keyboard are peeped, the function for encryption cannot be deduced back. (3) Compared with the existing electronic lock, the cost is the same, but the safety is greatly improved.

In short, the function-encrypted safety lock provided by the application changes the unlocking logic of the traditional electronic lock, greatly improves the safety of the electronic lock, has little change in manufacturing cost, and can be widely applied to occasions with certain requirements on safety, such as multimedia classrooms, libraries, data rooms, communities, and the like.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims (9)

1. The function-encrypted safety lock comprises a lock body, a lock tongue seat, a lock tongue, a keyboard and a display screen, and is characterized in that a controller, a battery and a buzzer are arranged in the lock body; the keyboard, the motor, the battery and the buzzer are respectively and electrically connected with the controller; the motor is used for driving the lock tongue to linearly reciprocate; the controller is provided with a mathematical function for encryption and a definition domain thereof; the controller is used for randomly generating independent variables, displaying the independent variables on the display screen, comparing the passwords input by the keyboard with the dependent variables, and controlling the rotation of the motor according to the comparison result.

2. The functionally encrypted security lock of claim 1, wherein the mathematical function is a unitary linear function.

3. The function encryption safety lock according to claim 1, wherein the spindle of the motor is connected to a screw, the screw is provided with a screw nut, and the lock tongue is connected to the screw nut.

4. The function-encrypted safety lock according to claim 2, wherein the lock body is provided with a first hall sensor and a second hall sensor, and the first hall sensor and the second hall sensor are respectively electrically connected with the controller; the screw nut is connected with a straight rod, and a magnet is arranged at one end of the straight rod corresponding to the Hall sensor.

5. The functionally encrypted safety lock according to claim 1, wherein the end of the lock body facing the bolt is provided with a distance sensor; the distance sensor is electrically connected with the controller.

6. The function encrypted security lock according to claim 1, wherein the keypad is provided with 0-9 number keys, a decimal key, a delete key, a confirm key, an unlock key, and a reset key.

7. The function-encrypted security lock according to claim 1, wherein the controller is a single-chip microcomputer.

8. A method for controlling a function-encrypted security lock, comprising the steps of:

s1, setting a mathematical function for encryption and a definition domain thereof in a controller;

s2, pressing an unlocking key on a keyboard, and starting an unlocking program;

s3, the controller randomly generates a new independent variable and displays the new independent variable on the display screen;

s4, inputting a password through a keyboard, and pressing a confirmation key;

s5, the controller compares the password input in the step S4 with the dependent variable corresponding to the independent variable in the step S3, and if the password is correct, the step S6 is executed; if the password is wrong, then re-executing the step S3;

s6, sounding the buzzer once; the motor rotates to drive the lock tongue to withdraw from the lock tongue seat; when the first Hall sensor detects the magnet, the motor stops rotating to finish unlocking;

s7, when locking is needed, aligning the lock body and the lock tongue seat; when the distance sensor detects the lock tongue seat, a reset key is pressed down; the motor reverses to drive the lock tongue to extend into the lock tongue seat; when the second hall sensor detects the magnet, the motor stops rotating.

9. The method for controlling a function-encrypted security lock according to claim 8, wherein in step S5, if the password is input three times in succession, the buzzer sounds long and the program locks for a time T; and after the time passes, the program is automatically reset.

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