JP2010144344A - Battery-operated electronic key and electric lock system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery-operated electronic key capable of sufficiently securing a flying distance even when a battery becomes exhausted and capable of extending a battery life; and to provide an electric lock system using the electronic key. <P>SOLUTION: The battery-operated electronic key 2 is used for the electric lock system which controls the locking and unlocking of an electric lock on the basis of the result of determination of validity of ID data. The electronic key 2, which performs ID data communication by means of electromagnetic waves for an inquiry, includes: a reception circuit 22 which receives the electromagnetic waves for the inquiry; a transmission circuit 24 which transmits the ID data; a charging circuit 25 which repeats a charging operation by the reception of the electromagnetic waves for the inquiry; and a control portion 23 which measures a power supply voltage when the charging circuit 25 is charged with the electromagnetic waves for the inquiry, received by the reception circuit 22, and which controls the transmission circuit 24 so that it can transmit the ID data, when the measured power supply voltage is a target voltage or above. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a battery-powered electronic key capable of communicating ID data using electromagnetic waves, and ID data transmitted to the battery-powered electronic key in response to the inquiry electromagnetic waves and returned in response to the inquiry electromagnetic waves. It is related with the electric lock system provided with the controller which discriminates | regulates the legitimacy and controls locking / unlocking of the electric lock based on the discrimination result.

  Various types of electric lock systems for locking and unlocking electric locks have been proposed in the past, and one of them uses a battery-powered electronic key and a controller. . In this electric lock system using a battery-powered electronic key and a controller, in order to communicate ID data with electromagnetic waves, the frequency and modulation method are determined in advance, and the controller periodically transmits inquiry electromagnetic waves. When the battery-operated electronic key in the vicinity of the controller receives this inquiry electromagnetic wave, ID data is returned to the controller. The controller collates the ID data returned from the battery-operated electronic key with previously registered data to determine the validity, and controls the unlocking or locking of the electric lock when it is normally authenticated.

Here, as an electric lock system using the battery-powered electronic key and the controller described above, for example, a door lock remote control device disclosed in Patent Document 1 is known. As shown in FIG. 4, in the remote operation device 51 of Patent Document 1, the portable device 52 normally transmits a transmission signal including a predetermined ID code in response to a predetermined request signal output from the transmission / reception device 53. . When the portable device 52 is out of battery, when the mode changeover switch 54 is turned ON, the transponder control unit 52a of the portable device 52 is driven by the transponder driving radio wave output from the transmission / reception device 53, and the transponder code is transmitted from the portable device 52. Send. The transmission / reception device 53 collates the transmission signal (ID code, transponder code) transmitted from the portable device 52, and unlocks the door lock based on the result of this collation.
JP 2006-336461 A

  Since the portable device 52 used in the remote control device 51 disclosed in Patent Document 1 described above uses two types of ID codes for long-distance transmission and transponder codes for short-distance transmission, Registration of two types of signals for each portable device 52 is indispensable in advance.

  Further, the transmission / reception device 53 normally transmits / receives an ID code to / from the portable device 52, and does not know when the transponder code comes. For this reason, in order to receive the transponder code when the battery of the portable device 52 is exhausted, it is necessary to press the mode changeover switch 54 to turn it on and inform the transmission / reception device 53 of that.

  By the way, in recent years, electronic devices such as mobile phones have become a necessity in daily life, but the battery-powered electronic key (mobile device) employed in the above-described electric lock system is put in a pocket together with the mobile phone or the like. However, there was a problem that the battery-powered electronic key misunderstood the radio wave of the mobile phone as a signal to itself and the ID was transmitted without permission, and the battery was exhausted at once.

  In addition, if ID transmission is frequently performed at a location where the battery-powered electronic key is away from the transmission / reception device (controller), the sequence number of the ID data of the battery-powered electronic key is updated more and more, and the sequence of ID data of the transmission / reception device is increased. The number does not match and the door is not unlocked. The sequence number is an encryption key number for preventing electromagnetic waves from being intercepted and used illegally elsewhere.

  Therefore, the present invention has been made in view of the above problems, and a battery-type electronic key that can secure a sufficient flight distance even when the battery is exhausted and can improve the battery life and the same are used. The object is to provide an electric lock system.

In order to achieve the above object, the battery-operated electronic key according to claim 1 is used in an electric lock system that determines the validity of ID data and controls the locking and unlocking of the electric lock based on the determination result. In a battery-powered electronic key that communicates the ID data using electromagnetic waves for use,
A receiving circuit for receiving the inquiry electromagnetic wave;
A transmission circuit for transmitting the ID data;
A charging circuit that repeats the charging operation by receiving the inquiry electromagnetic wave;
The power supply voltage when the charging circuit is charged with the inquiry electromagnetic wave received by the reception circuit is measured, and the transmission circuit is controlled to transmit the ID data when the measured power supply voltage is equal to or higher than a target voltage. And a control unit.

The battery-operated electronic key according to claim 2 is the battery-operated electronic key according to claim 1,
The ID data includes one type of data for one battery-powered electronic key.

The electric lock system according to claim 3 is an electric lock system using the battery-operated electronic key according to claim 1 or 2,
An inquiry electromagnetic wave is periodically transmitted to the battery-operated electronic key, ID data transmitted from the battery-operated electronic key is received in response to the inquiry electromagnetic wave, and its validity is determined. A controller for controlling the locking and unlocking of the electric lock is provided.

The electric lock system according to claim 4 is the electric lock system according to claim 3,
The battery-powered electronic key has a preset signal width of an inquiry electromagnetic wave that is regarded as a regular signal, and is activated by receiving a signal, and when the inquiry electromagnetic wave is received from the controller, the inquiry electromagnetic wave is The ID data is transmitted assuming that it is a regular signal, and when a signal that is not regarded as a regular signal is continuously received a predetermined number of times or more, it shifts to a sleep state in which a low power consumption operation is performed.

According to the present invention, even if the battery is exhausted, a sufficient flight distance can be secured, and even an unfamiliar person can easily pass through the doorway.
Further, even when the battery-type electronic key is carried with an electronic device such as a mobile phone, a sufficient battery life can be ensured.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic block diagram showing the overall configuration of an electric lock system including a battery-powered electronic key according to the present invention, and FIG. FIG. 3 is an operation flowchart when the battery of the battery-operated electronic key is exhausted and lost in the electric lock system according to the present invention.

  As shown in FIG. 1, an electric lock system 1 according to the present invention uses a battery-type electronic key 2 carried by a user, and is constructed by including a controller 3 and an electric lock 4. Each configuration will be described below.

  As shown in FIG. 1, a battery-type electronic key 2 carried by a user is roughly configured to include a battery 21, a receiving circuit 22, a control unit (microcomputer) 23, a transmitting circuit 24, and a charging circuit 25. The battery-powered electronic key 2 of the present invention uses the same ID data for long-distance transmission and short-distance transmission. For this reason, one type of ID is registered in the controller 3 in advance for each battery-type electronic key 2.

  The receiving circuit 22 operates using the battery 21 as a driving power supply, receives an external signal (electromagnetic wave) from the antenna 22 a, and outputs the received signal to the control unit 23.

  The control unit 23 operates using the battery 21 as a driving power supply, and is normally in a sleep state in which a low power consumption operation is performed. The control unit 23 is activated by a reception interrupt when the reception circuit 22 receives a signal, and measures the signal width of the signal received by the reception circuit 22. Further, the control unit 23 determines whether or not the measured signal width is a signal width of a regular signal (a legitimate inquiry electromagnetic wave for the battery-operated electronic key 2). When it is determined that the received signal has the signal width of the normal signal, the ID data is output to the transmission circuit 24 at the timing when the signal is turned off. At this time, the count value N obtained by counting a signal (noise) that is not a normal signal is reset to 0, and the sequence number is incremented. On the other hand, when the received signal is not the signal width of the regular signal, that is, when it is determined as noise, the number of times is counted, and it is determined whether or not the counted number is equal to or more than the specified number. When it is determined that the count value has exceeded the specified number of times, the count value is reset to 0, the reception interrupt mask is activated, the hardware timer is activated, and a transition is made to a sleep state in which a low power consumption operation is performed. The reception interrupt mask is a function that prevents the reception circuit 22 from accepting a signal even if it is received. If the hardware timer interrupts after a predetermined time elapses, the reception interrupt mask is canceled, and a transition is made to a sleep state in which a low power consumption operation is performed to prevent the battery 21 from being consumed.

  Further, as shown in FIG. 1, the control unit 23 includes a power supply voltage measurement unit 23a and a voltage comparison determination unit 23b. When the receiving circuit 22 receives the inquiry electromagnetic wave transmitted from the controller 3, the power supply voltage measuring means 23a generates a hardware reset (power supply reset) by the inquiry electromagnetic wave, and the control unit 23 is activated to start resetting. The power supply voltage by the charging voltage of the charging circuit 25 at the time of receiving the inquiry electromagnetic wave is measured. The voltage comparison / determination means 23b compares the power supply voltage measured by the power supply voltage measurement means 23a with a preset target voltage (a voltage sufficient to transmit ID data), and the power supply voltage becomes equal to or higher than the target voltage. It is determined whether or not. Then, when the power supply voltage becomes equal to or higher than the target voltage as determined by the voltage comparison determination unit 23b, the control unit 23 controls the transmission circuit 24 to transmit the ID data from the antenna 24a of the transmission circuit 24, and after transmitting the ID data Transition to sleep mode for low power consumption operation.

  The transmission circuit 24 operates using the battery 21 as a driving power source. When the reception circuit 22 receives a regular signal (inquiry electromagnetic wave from the controller 3), the transmission circuit 24 responds to the regular signal under the control of the control unit 23. ID data is transmitted from the antenna 24a.

  The charging circuit 25 has a capacitor C that repeats the charging operation by receiving the inquiry electromagnetic wave transmitted from the controller 3. In addition, a diode D1 is provided between the receiving circuit 22 and the capacitor C, an anode is connected to the receiving circuit 22 side, and a cathode is connected to the capacitor C side. Furthermore, a diode D2 is provided between the battery 21 and the capacitor C, the anode is connected to the + electrode of the battery 21, and the cathode is connected to the capacitor C side. In the charging circuit 25, the power generation operation is a constant current operation, and the voltage of the capacitor C increases every time the charging operation by the inquiry electromagnetic wave is repeated, so that a large amount of energy can be stored.

  The controller 3 operates by receiving power supply from a commercial power supply (AC100V) as an external power supply, and is an inquiry electromagnetic wave (for example, an electromagnetic wave not modulated with a T1 ms width) that is regarded as a regular signal by the battery-powered electronic key 2. ) Regularly. This inquiry electromagnetic wave can determine the difference between the signal width (T3ms: T2) and the signal width (T2ms or less) of an electronic device such as a mobile phone as a condition when the battery-powered electronic key 2 transmits ID data. Time).

  The controller 3 also receives ID data from the battery-operated electronic key 2 for the inquiry electromagnetic wave, and compares the received ID data with a registered ID registered in advance for each battery-operated electronic key 2. Thus, the legitimacy of the ID data is determined, and a drive control signal is output to unlock or lock the electric lock 4 only when the ID data is normally authenticated.

  The electric lock 4 is composed of a drive device such as a motor or a solenoid and a lock, for example, and is driven to lock or unlock the lock by a drive control signal input from the controller 3, with respect to the locking hole of the door frame. The lock is unlocked by protruding the dead bolt (when locking) or pulling it (when unlocking).

  Next, the normal operation when the battery-type electronic key 2 is used in the electric lock system 1 will be described with reference to FIG.

  The battery-powered electronic key 2 is in a sleep state in which the control unit 23 normally performs a low power consumption operation. In this state, when the receiving circuit 22 receives a signal from the outside (ST1), the control unit 23 is activated by a reception interrupt of this signal reception (ST2). Then, the control unit 23 measures the signal width of the signal received by the receiving circuit 22 (ST3). Subsequently, the control unit 23 determines whether or not the measured signal width is a signal width of a normal signal (ST4). When the measured signal width is determined to be the signal width of the normal signal (ST4-Yes), the control unit 23 transmits ID data from the transmission circuit 24 at the timing when the normal signal is turned off (ST5), and the count value N = 0 (ST6), the sequence number is incremented (ST7), and a transition is made to a sleep state in which a low power consumption operation is performed (ST8).

  Further, when determining the measured signal width, the control unit 23 determines that the measured signal width is not the signal width of the normal signal, that is, noise (ST4-No), and sets the count value N = N + 1 (ST9). It is determined whether N is greater than the specified number of times (ST10). When determining that the count value N is not greater than the specified number (ST10-No), the control unit 23 shifts to a sleep state in which a low power consumption operation is performed (ST8). On the other hand, if the control unit 23 determines that the count value N is larger than the specified number of times (ST10-Yes), the control unit 23 sets the count value N = 0 (ST11), starts the reception interrupt mask hardware timer (ST12), A transition is made to a sleep state in which a low power consumption operation is performed (ST13). When a predetermined time has elapsed, the control unit 23 cancels the reception interrupt mask by a hardware timer interrupt (ST14) (ST15), and then shifts to a sleep state in which a low power consumption operation is performed (ST8).

  Next, the operation of the electric lock system 1 when the battery 21 of the battery-powered electronic key 2 is exhausted will be described with reference to FIG.

  As a hardware operation, an inquiry electromagnetic wave is received from the controller 3 (ST21), and when the power supply is reset and the control unit 23 is activated (ST22), the power supply voltage measuring means 23a measures the power supply voltage due to the charging of the charging circuit 25. (ST23). Then, the voltage comparison / determination means 23b determines whether or not the measured power supply voltage is equal to or higher than the target voltage (ST24). When the voltage comparison determination unit 23b determines that the measured power supply voltage is equal to or higher than the target voltage (ST24-Yes), it transmits ID data (ST25), and the control unit 23 shifts to the sleep state (ST26). On the other hand, when the voltage comparison determination unit 23b determines that the power supply voltage has not reached the target voltage (ST24-No), the control unit 23 shifts to the sleep state without transmitting ID data (ST26).

  Thus, in the electric lock system 1 to which the battery-type electronic key 2 of this example is applied, long distance transmission and short distance transmission can be performed with the same ID data. As a result, one type of registration can be completed for each battery-powered electronic key 2.

  Further, when the battery 21 is exhausted, when the battery-powered electronic key 2 is brought close to the controller 3, an electromotive force is generated in the battery-powered electronic key 2 by electromagnetic induction, and the generated electromotive force serves as a trigger. A hardware reset occurs in the control unit 23 of the electronic key 2. Then, when the reset is started, the power supply voltage is measured. When the measured voltage becomes higher than the target voltage and the capacitor C of the charging circuit 25 is sufficiently charged, ID data is transmitted. As a result, the battery-operated electronic key 2 is automatically operated at a battery-less timing just by bringing the battery-type electronic key 2 close to the controller 3, so that an extra changeover switch is not required.

  Further, since the power generation operation of the battery-type electronic key 2 is a constant current operation, the voltage of the capacitor C increases every time the charging operation is repeated, and a large amount of energy can be stored. Since the ID data is transmitted to the controller 3 when the charging voltage of the capacitor C reaches a sufficient level, the flight distance can be secured and the difficulty of use can be eliminated.

  As a result, even if the battery 21 is exhausted, a flight distance of several tens of millimeters can be secured, and even an unfamiliar person can easily pass through an entrance / exit (a house entrance door, a condominium common entrance, etc.).

  In this example, the signal transmitted from the controller 3 to the battery-powered electronic key 2 is given a signal width different from the radio wave of the mobile phone, and the battery-powered electronic key 2 determines whether the signal is an original signal or noise. Is going. Further, when the noise is continuously received more than the specified number of times, the battery 21 is prevented from being consumed by shifting the specified time circuit to the sleep state in which the low power consumption operation is performed. Thereby, even when an electronic device such as a mobile phone is carried with the battery-powered electronic key, a sufficient battery life can be ensured.

  By the way, in embodiment mentioned above, when the controller 3 authenticated normally the ID data from the battery-powered electronic key 2 with respect to the electromagnetic wave for inquiry, it demonstrated as a structure which unlocks or locks the electric lock 4, but the user The touch switch that reacts when touched by hand is provided in the controller 3, and when the controller 3 normally authenticates the ID data from the battery-operated electronic key 2 with respect to the electromagnetic wave for inquiry, the mode is shifted to the unlocking mode or the locking mode. The electric lock 4 can be unlocked or locked by touching the touch switch after the mode transition. Alternatively, the electric lock 4 may be automatically locked when a predetermined time has elapsed after the electric lock 4 is unlocked.

It is a schematic block diagram which shows the whole structure of the electric lock system containing the battery-type electronic key which concerns on this invention. It is an operation | movement flowchart at the time of normal operation using the battery-powered electronic key in the electric lock system which concerns on this invention. It is an operation | movement flowchart when the battery of a battery-type electronic key is exhausted and is lost in the electric lock system which concerns on this invention. It is a block diagram of the remote control apparatus of the door lock disclosed by patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric lock system 2 Battery type electronic key 21 Battery 22 Reception circuit 23 Control part 23a Power supply voltage measurement means 23b Voltage comparison discrimination means 24 Transmission circuit 25 Charging circuit 3 Controller 4 Electric lock

Claims (4)

In a battery-operated electronic key that determines the legitimacy of ID data and is used in an electric lock system that controls locking and unlocking of the electric lock based on the determination result, and exchanges the ID data using an electromagnetic wave for inquiry.
A receiving circuit for receiving the inquiry electromagnetic wave;
A transmission circuit for transmitting the ID data;
A charging circuit that repeats the charging operation by receiving the inquiry electromagnetic wave;
The power supply voltage when the charging circuit is charged with the inquiry electromagnetic wave received by the reception circuit is measured, and the transmission circuit is controlled to transmit the ID data when the measured power supply voltage is equal to or higher than a target voltage. A battery-operated electronic key comprising: 2. The battery-powered electronic key according to claim 1, wherein the ID data includes one type of data for each battery-powered electronic key. An electric lock system using the battery-powered electronic key according to claim 1 or 2,
An inquiry electromagnetic wave is periodically transmitted to the battery-operated electronic key, ID data transmitted from the battery-operated electronic key is received in response to the inquiry electromagnetic wave, and its validity is determined. An electric lock system comprising a controller for controlling the locking and unlocking of the electric lock based on the controller. The battery-powered electronic key has a preset signal width of an inquiry electromagnetic wave that is regarded as a regular signal, is activated by receiving a signal, and when the inquiry electromagnetic wave is received from the controller, the inquiry electromagnetic wave is 4. The ID data is transmitted as a regular signal, and when a signal that is not regarded as a regular signal is continuously received a predetermined number of times or more, a transition is made to a sleep state in which a low power consumption operation is performed. The electric lock system described.

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