KR980009726A - Electronic key and control method - Google Patents

Abstract

The present invention includes a microcomputer for outputting an external relay drive control signal if the same as the input value set by checking the input key, the input key input from the input button, and if not the same; The electronic key and its control method, using the ON state duration and OFF state duration of one push button to enter the password of a number combination to perform the electronic key function with the microcomputer do. Normally, the power is off, but if there is a button input, the power is applied and the microcomputer is operated. If there is no button input, the power is automatically turned off after a certain time. Unlike conventional electronic keys that use multiple buttons, a single button can be used to enter various combinations of numbers.The door is opened and closed by comparing the previously saved password with the entered number. This saves power and prevents unauthorized opening and closing of the door by unauthorized persons who do not know the password.

Description

Electronic key and control method

The present invention relates to an electronic key for performing a key operation using a single button and a microcomputer, and a control method thereof, and more particularly, an ON state duration and an OFF state duration of one push button. The present invention relates to an electronic key for performing an electronic key function together with a microcomputer by inputting a password of various number combinations using the key and a control method thereof.

The conventional electronic key is composed of a key using a push button representing 10 numeric keys or an electronic IC card such as a magnetic card or a smart card, and the overall components are complicated.

Accordingly, an object of the present invention is to provide an electronic key having a simple input device for inputting a plurality of number combinations with a single button.

Another object of the present invention to provide an electronic key having a password verification function.

Still another object of the present invention is to provide an electronic key having a power saving function in which power is applied only when there is a button input, and power is automatically cut off after a predetermined time when there is no button input.

Still another object of the present invention is to provide an electronic key control method for outputting a control signal by recognizing a number of predetermined digits input using a single button.

1 is a schematic block diagram of an electronic key according to the present invention.

2 is a timing diagram of a pulse waveform illustrating that various numbers can be input by a single button.

3 is a flow chart of a program embedded in the microcomputer for explaining the control method of the electronic key according to the present invention.

4 is a detailed circuit diagram of the electronic key of FIG.

In order to achieve the above object, the electronic key for operating the controlled device according to the user's button input according to the present invention is a single button; Recognizing the duration of the button on state in which the button is pressed and the duration of the button off state in which the button is not pressed, the number of desired digits is input and compared with the preset number. A microcomputer outputting a control signal according to the comparison result; And a power supply unit which supplies power to the microcomputer only when there is a single button input, and stops supplying power to the microcomputer after a predetermined time when there is no button input.

Another object of the present invention is to control an electronic key for operating a controlled device according to a user's button input, comprising the steps of: (a) detecting a button input to initialize a system; (b) detecting whether the button continues to be idled in step (a); (c) increasing the value of the first counter indicating the unit time by 1 when the button is kept pressed in step (b), and locking the lock as the controlled device and turning off the power when a predetermined delay time is reached; (d) If the button is not pressed continuously in step (b), the value of the second counter indicating unit time is increased by 1 and the button is pressed again until the value of the second counter reaches a predetermined number M; Detecting presence; (e) repeating steps (b) to (d) until the desired number of digits is reached according to the value of the second counter when the button is pressed again in step (d); And (f) generating a control signal by comparing an input number having a desired digit with a preset number stored in the step (e) and generating a control signal. It is.

Hereinafter, preferred embodiments of an electronic key and a control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an electronic key according to the present invention, in which a button input unit 10 composed of a single button is recognized, a time when the button is pressed and a time from when it is pressed once until the next time is pressed is inputted with a desired number of digits. If the microcomputer 20 and the single button are input only when the microcomputer 20 outputs a control signal to the operating unit 40 and the single button is input according to the comparison result. It includes a power supply unit 30, the power supply is stopped by the microcomputer 20 after a predetermined time.

2 is a timing diagram of pushing the push button of the button input unit 10 of FIG. 1. When the button is pressed while the power is not supplied, power is supplied from the power supply unit 30 to the microcomputer 20, and the microcomputer 20 starts up. Then, the power is turned on and the button input is recognized according to a predetermined program to accept the password. If the button is turned on and the button is turned off (0ff), the number of digits and the password are determined according to the time interval between the button on and the button off. During password entry, if the off time is longer than 0.5 seconds and shorter than 2 seconds during the on / off time interval of the button, the number of digits of the password goes up by one digit, and if the on / off time interval is shorter than 0.5 second, the number of password increases. Password is determined. For example, if you enter the four-digit password 4233 as shown in the timing diagram of Fig. 2, the off time is quickly pressed four times (less than 0.5 seconds), the button is turned off for more than 0.5 seconds and less than two seconds, and is quickly pressed twice, Wait for more than 0.5 seconds and less than 2 seconds with the button off, press three times quickly, wait for more than 0.5 seconds and less than 2 seconds with the button off, then quickly press three times again. The microcomputer monitors the above process, and if the built-in password and the input password are correct, the microcomputer drives the relay of the lock driver and if it is wrong, the alarm of the horn is triggered. The power is automatically opened if more than 2 seconds pass without input while the button is turned off during the password input process.

FIG. 3 is a flowchart illustrating a password input embedded in the microcomputer 20 of FIG. 2. In FIG. 3, a method of controlling an electronic key for operating a controlled device according to a user's button input includes (a) detecting an input of a button and initializing a system (50), (b) in step (a). Detecting whether the button is continuously pressed (51), (c) If the button is kept pressed in the step (b), the value of the first counter indicating the unit time interval is increased by 1 so that the counter value is a predetermined number N. When the delay time exceeds a predetermined time, the operation of the controlled device associated with the lock lock and turning off the power (52-54), (d) when the button is not pressed continuously in the step (b) Detecting whether the button is pressed until the value of the second counter reaches a predetermined number M (56-58), (e) if the button is pressed again in the step (d) according to the value of the second counter Until the desired number of input digits is reached Repeating steps (b) to (d) (51-64), and (f) generating a control signal by comparing the input number of desired digits in the step (e) with a password that is preset and stored. Steps 65-68 are included.

On the other hand, there may be a number of ways to preset the password embedded in the microcomputer, but in the present invention, only one button in addition to the numeric key input button is provided only when the correct password is entered, the password desired by the user Can be set so that it can be embedded in EEROM in the microcomputer.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The password entered is 4 digits for convenience. The microcomputer 20 operates from the moment the button is pressed by the button input unit 10. For convenience, the push button off time related to the size and number of digits is 0.5 seconds or more, and there is no input time when the power is turned off. Seconds. In step 50, there is an initial button input, and power is supplied to the microcomputer 10, and at the same time, the microcomputer 10 initializes the power. In step 51, if the button is kept pressed, the value of the first counter indicating the button on time is increased by one if the button is kept pressed. If the button on state has been pressed continuously for more than 2 seconds in step 53, the flow advances to step 54 to lock the door to turn off the power.

On the other hand, if the button is not pressed continuously in step 51, the value of the second counter is increased by 1 in step 56, and in step 57, the button is turned on and off. If the button is off, the process proceeds to step 58 to check the time when the button is off. The steps 56 and 58 are repeated until the time when the button is turned off has elapsed for 2 seconds or more indicating that the input of the password has been completed.

If the time when the button is turned off for 2 seconds or more in step 58 proceeds to step 59. If the button is turned on again in step 57, the process proceeds to step 59, and if the button off time is less than 0.5 seconds in step 56-58, the step 60 is performed to increase the number of the password. If it is between 2 seconds, step 61 of increasing the number of digits of the password is performed. If the off time is 2 seconds or more, the number of digits is checked in step 62. If the number of digits in the password is four digits or less in step 62, the process proceeds to step 64 and repeats steps 51-64 until a four-digit number is entered. If the number of digits is larger than 4 digits, it is recognized that the button input is wrong and the flow proceeds to step 63 to initialize the password number, the number of digits, and the second count value, and execute again from step 51.

If all four-digit passwords have been entered in step 4, proceed to step 65; otherwise, go back to step 51 to continue entering the password. In step 65, if the password embedded in the microcomputer is the same as the input number, the flow proceeds to step 67 to turn on the lock relay to open the door of the operation unit 40 of FIG. 2, and if the difference is to step 66, the alarm sounds and in step 67 Turn off the power.

4 is a detailed circuit diagram of an electronic key according to the present invention, which includes an input / output device, a processing unit 20 including a one-chip microcomputer 22 incorporating a CPU, a ROM, a RAM, and an EEPROM, and a single push button SW1. The power supply unit 30 and the horn 44 which supply power to the button input unit 10 which performs the input, and the microcomputer 22 when there is a button input, and the power is automatically cut off by the microcomputer if the button input is definite. And an operating unit 40 including relays 46 and 48 for driving the lock 42.

In detail, when the button SW1 of the button input unit 10 is attached, the main power supply Vbatt supplies the power Vcc to the microcomputer 20 while supplying power to the voltage regulator 32 through the diode D4. Maneuver When the microcomputer 22 outputs a signal for operating the transistor Q3 at an initial stage when the microcomputer 22 is activated, the transistor Q4 is operated to continuously supply power to the microcomputer 22. After the power is applied to the microcomputer, the push button SW1 is connected to the password input key through the resistors R1, R2 and R10, the capacitor C4 and the diode D5 of the button input unit 10. If the push button input is not used for a predetermined time or more, the microcomputer turns off the transistor Q3 to cut off the microcomputer power supply (Q4 off) to stop the operation of the electronic key. If the number entered in the microcomputer and the built-in password match, the microcomputer operates the transistor Q1 to supply power to the relay 46 to operate the relay contact K1 so that the lock 42 is opened. If the number input from the microcomputer and the built-in password do not match, the microcomputer operates the transistor Q2 to supply power to the relay 48 to operate the relay contact K2 so that the alarm 44 sounds. In the figure, C1-C5 are capacitors, R1-R10 and RV1-RV2 are resistors, and D1-D3 are diodes.

As described above, in the present embodiment, the password has four digits, and the button on and button off time intervals related to the digits and numbers are set to 0.5 seconds, and the power is turned off when the off time is continued for 2 seconds or more. However, it will be apparent to those skilled in the art that the design is possible at other times, and thus the detailed description will be omitted. In addition, since the lock of the door is possible by inputting the password in the same operation in the power-on state, a detailed description of the lock will be omitted.

As described above, the electronic key of the present invention and the control method thereof may be used to operate various doors such as automobile doors, and in particular, an additional button may be attached to enable the vehicle to be started with another relay. .

Claims (9)

An electronic key for operating a controlled device in response to a user's button input, comprising: a single button; Recognizing the duration of the button-on that presses the button and the duration of the button-off that does not press the button, if the desired number of digits and numbers have been input, the microcomputer presets the stored numbers and outputs a control signal according to the comparison result. ; And a power supply unit which supplies power to the microcomputer only when the button is input, and stops supplying power to the microcomputer after a predetermined time when there is no button input. The electronic key of claim 1, further comprising another setting button to set a desired password. The electronic key as claimed in claim 1, wherein the number preset and stored in the microcomputer is embedded in a program in the microcomputer or embedded in a nonvolatile memory (EEPROM, etc.). The electronic key according to claim 1, wherein the number stored in advance in the microcomputer is stored in the microcomputer with a desired number of digits, and a button different from the password input button may be set to allow the user to set a desired number. . The method of claim 1, wherein the microcomputer checks the duration of the button-on, and if the duration is less than the first predetermined value, the microcomputer continuously checks the button-on duration until the button is turned off. Electronic key, characterized by locking the lock and power off. The method of claim 5, wherein the microcomputer checks the duration of the button off, and if the duration is less than or equal to the second predetermined value, increases the number of passwords, and if the duration is greater than or equal to the second predetermined value and less than or equal to the third predetermined value. Increase the number of digits by one, check the number of digits if it is larger than the third predetermined value, and if it is larger than the desired number of digits, reset the password that has been input so far and detect whether there is a continuous button input. It detects whether there is the button input that is continued until it reaches the desired number, and if it is the desired number of digits, it compares with the preset password, and if it matches, it outputs a control signal for operating the controlled device. Electronic key characterized in that. A method of controlling an electronic key for operating a controlled device in response to a user's button input, the method comprising: initializing a system by detecting a button input; 가 detecting whether the button is continuously pressed in the step ⒞; locking the lock and turning off the power when the time when the button is kept being pressed in the step 이 exceeds a predetermined time, and ⒟ the button in the step ⒝ Increasing the count value of the second counter indicating the unit time by one and detecting whether the button is pressed again until the second counter value reaches a predetermined number M when the second counter value is not pressed continuously; 경우 if the button is pressed again in step ⒟, repeating steps ⒝ to 때 until the desired number of digits is reached according to the count value of the second counter; And (b) generating a control signal by comparing a number stored in advance with a desired number of digits input in the step (v), and generating a control signal. 8. The method of claim 7, wherein the step ⒠ increases the number of input numbers by one if the second counter value is less than or equal to L, and increases the number of digits by more than L and less than or equal to M, If larger, check the number of digits, and if it is larger than the desired digit, reset the number input so far, detect continuous button input, and if smaller than the desired digit, detect the button input until the desired digit is reached. How to control the keys. [8] The method of claim 7, wherein the step ⒡ outputs a control signal for operating the controlled device if it compares with the input number which is preset and stored, and outputs a control signal for operating the alarm if it does not match. Electronic key control method. ※ Note: The disclosure is based on the initial application.