JP4487452B2 - Non-contact type locking / unlocking control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact type locking / unlocking control device for locking and unlocking a plurality of electric locks arranged close to each other by remote control, and in particular, a reader electromagnetically coupled to an IC card type information recording device. The present invention relates to a non-contact type locking / unlocking control device that prevents radio wave interference between writer devices.
[0002]
[Prior art]
Conventionally, in a non-contact type locking and unlocking control device for operating lock and unlock the electric lock by remote control, the non-contact type IC tag, IC card, wristband in IC built, IC card type information recording device, and this A reader / writer device that is electromagnetically coupled to a kind of information recording device is used.
[0003]
When a non-contact type locking / unlocking control device is applied to a locker system in which a large number of locker doors are arranged adjacent to each other, key data for locking / unlocking a specific electric lock is recorded on an information recording device such as an IC card. The For example, in order to read key data from an IC card, specify one from a plurality of locker doors, and lock or unlock an electric lock by remote control, it is arranged for each lock of each locker door. The specific key data that should be permitted to be unlocked is stored in the reader / writer device, and the key data returned from the IC card is locked / unlocked to the specific electric lock in response to the radio wave of the specified frequency emitted from the reader / writer device. It was read as a command signal.
[0004]
However, in a locker system in which a large number of locker doors are arranged adjacent to each other, a plurality of reader / writer devices are installed in a narrow area. Therefore, if multiple doors are unlocked and unlocked at the same time, radio waves such as a key data read command are generated simultaneously from a plurality of reader / writer devices. Communication performance decreases.
[0005]
[Problems to be solved by the invention]
As described above, in the conventional non-contact type locking / unlocking control device, when the communication performance with the IC card type information recording device deteriorates due to radio wave interference between the reader / writer devices, the electric lock is remotely connected. There is a possibility that the function of controlling and locking / unlocking may not work normally. In order to prevent such radio wave interference, the reader / writer devices may be set apart by a certain distance or more. However, in the locker system, there are many cases in which a large number of reader / writers must be installed adjacent to each other, and there has been a problem that in practice it is not possible to eliminate radio wave interference.
[0006]
The object of the present invention is to apply to an IC card type information recording device such as a non-contact type IC tag, IC card, wristband, etc. even when applied to a system in which a large number of reader / writer devices are arranged adjacent to each other. It is an object of the present invention to provide a non-contact type locking / unlocking control device that can reliably communicate with each other.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, there is provided a non-contact type locking / unlocking control device for locking / unlocking a plurality of electric locks arranged close to each other by remote control. This non-contact type locking / unlocking control device is electromagnetically coupled to the electric lock, and is provided for each electric lock, remote control means for remotely controlling each electric lock by transmitting specific key data, A transmission / reception antenna for transmitting the key data read command to the remote control means and receiving the key data from the remote control means, a transmission circuit for modulating and amplifying the read command, and amplifying the key data a receiving circuit for and demodulating, so as to turn on for a predetermined time and the gate circuit, said gate circuit at different timings in each electric lock provided between the transmission circuit and the receiving antenna for each of the electric lock and control means higher for notifying the communication permission command, based on the communication permission command notified from the control unit of the host to allow the transmission of the read command to the Composed of a timing control means for on-off controlling the gate circuit to receive the key data at the transmitting and receiving antennas.
[0008]
In the non-contact type locking / unlocking control device according to the present invention, the number of transmission / reception means (transmission / reception antennas) outputting a key data read command is always limited to one at any timing. Interference between radio waves can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the locking / unlocking control apparatus of the present invention is applied to a locker system having a plurality of lockers will be described with reference to the drawings.
[0010]
FIG. 1 is a block diagram showing a configuration of a non-contact type locking / unlocking control apparatus.
The locker system having N lockers includes a plurality of IC card reader / writer devices (hereinafter simply referred to as reader / writers) each including an antenna 1 for receiving a locking / unlocking command signal for an electric lock (not shown). . The antenna 1, the non-contact type IC tag, respectively, IC card, wristband in IC built, it receives the unlocking command signal from the IC card type information recording device.
[0011]
The first reader / writer controls locking / unlocking of the first locker door according to the locking / unlocking command signal received by the antenna 1, and includes a CPU 2, a channel setting circuit 3, a host communication driver circuit 4, a communication controller 5, The circuit 6 includes a transmission circuit 7 and a reception circuit 8.
[0012]
In the CPU 2, the channel number of the reader / writer is set by the channel setting circuit 3. Further, the CPU 2 receives a communication permission command from the host controller by the host communication driver circuit 4.
[0013]
The communication controller 5 receives the communication permission command from the CPU 2 and outputs a data read command to the IC card type information recording apparatus on the radio wave. The AND circuit 6 constitutes timing control means for setting different timings for each electric lock according to a communication permission command from the CPU 2, and is turned on and off so as to output radio waves from the communication controller 5 for a specified time. It is controlled.
[0014]
The transmission circuit 7 transmits the identification signal of the first reader / writer from the antenna 1 and functions as a transmission amplifier that modulates and amplifies the data read command from the AND circuit 6. The receiving circuit 8 provides key data to the CPU 2 via the communication controller 5 and functions as a receiving amplifier that amplifies and demodulates the response command received by the antenna 1. The CPU 2 unlocks the first locker door corresponding to the first reader / writer when it receives the specific key data, and locks it when it is unlocked. The locking / unlocking control is executed.
[0015]
The Nth reader / writer controls the locking and unlocking of the Nth locker door. Like the first to (N-1) th reader / writers, the CPU 2, the channel setting circuit 3, and the upper communication driver circuit 4 , Communication controller 5, AND circuit 6, transmission circuit 7, and reception circuit 8.
[0016]
These N reader / writers are all connected to the same host controller via the host communication driver circuit 4.
Here, the general operation of the reader / writer that remotely controls the lock or unlocking of the electric lock of the locker door using an IC card will be described. On the reader / writer side, in order to read the key data recorded in the non-contact IC card, the IC card is irradiated with radio waves of a specified frequency. A command packet for reading specific data in the IC card is modulated and carried on the radio wave.
[0017]
On the IC card side, a voltage is generated by irradiating radio waves, and an electric circuit incorporated in an internal IC chip becomes operable. Therefore, the command packet transmitted on the radio wave is demodulated, and the designated key data is read from the nonvolatile memory in the IC card. The read key data is transmitted to the reader / writer side as a response packet corresponding to the command by modulating the irradiated radio wave.
[0018]
The reader / writer demodulates the received radio wave, obtains key data on the IC card side from the response packet, and if there is something that matches the key data stored on the reader / writer side, performs a series of locking and unlocking operations. If there is no matching key data, it is ignored as an invalid IC card is read. However, when a non-contact type locking / unlocking control device is applied to a locker system having a plurality of locker doors, if radio wave interference occurs between reader / writers, the communication performance with the IC card deteriorates.
[0019]
Therefore, in the locking / unlocking control apparatus of the present invention, the AND circuit 6 is on / off controlled so as to permit the output of radio waves for a predetermined time at different timings according to instructions from the host controller.
[0020]
FIG. 2 is a block diagram showing the configuration of the upper controller in the locker system described above.
The controller includes a lower communication driver circuit 21 that performs communication with the lower reader / writer shown in FIG. 1, a channel number setting circuit 22 that sets the number of channels of the reader / writer connected to the lower communication driver circuit 21, and a CPU 23. ing. When the CPU 23 receives a radio wave output request from any of the lower-level communication driver circuits 21, the CPU 23 notifies a communication permission command for permitting the output of radio waves to the lower-level reader / writer at regular intervals.
[0021]
From the controller configured as described above, the lower-level reader / writer can obtain a communication permission command for radio wave output at different timings, and can lock / unlock the locker door by a corresponding electric lock locking / unlocking command signal. .
[0022]
FIG. 3 is a flowchart showing a procedure of locking / unlocking control by each reader / writer.
In step S1, the reader / writer receives a communication permission command from the host controller (FIG. 2) via the host communication driver circuit 4. Based on the channel number of the reader / writer set by the channel setting circuit 3, the CPU 2 of each reader / writer determines whether it is a communication permission command for its own station (step S2). That is, if it is a communication permission command for the own station, the process proceeds to step S3, and if not, the process returns to step S1 and waits.
[0023]
In step S3, an elapsed timer for counting the specified time is started using the internal timer counter of the CPU2. In step S4, a gate control signal from the CPU 2 to the AND circuit 6 is turned on, and radio wave output from the antenna 1 is permitted. When a radio wave such as a command packet is output from the antenna 1, the process proceeds to step S5, and the reader / writer performs communication for a series of door operations such as reading and writing necessary data with an IC card or the like. Can do.
[0024]
In step S6, the internal timer counter of the CPU 2 is monitored to determine whether a specified time has elapsed. When the specified time is counted up, the process proceeds to step S7, the radio wave output is turned off, the process returns to step S1, and the next communication permission command is awaited. Here, it is assumed that the locking / unlocking of the locker door is completed within a specified time. Therefore, when the specified time is counted up, the locking / unlocking operation in the reader / writer is completed, and the next reader / writer can permit the output of radio waves.
[0025]
FIG. 4 is a flowchart showing a timing control procedure in the host controller.
In step S 11, the reader / writer channel number set by the channel number setting circuit 22 is taken into the CPU 23 at the start of control. Next, in step S12, an initial channel number for giving a communication permission command is set to 1. Then, a communication permission command is transmitted to each station of the lower reader / writer via the communication driver circuit 21 (step S13).
[0026]
When the communication permission command has been transmitted to the plurality of reader / writers connected to the lower level for a specified time, the process proceeds from step S14 to step S15, and the channel number to which the communication permission command is given is incremented by +1 and then step S16. The process returns to step S13.
[0027]
By repeatedly executing Steps S13 to S15, each reader / writer performs a series of communications for door operation for a specified time, as described in Step S5 of FIG. As a result, a non-contact type locking / unlocking operation is performed on each locker door by remote control from an electromagnetically coupled IC card or the like. Finally, if it is determined in step S16 that all the channels have been made, the process returns to step S12, and the initial channel number is reset to 1.
[0028]
As described above, in the above-described non-contact type locking / unlocking control apparatus, communication permission timing is allocated to each reader / writer in a time-sharing manner, and notification is given from a host controller, so that predetermined timing is different from each other. On / off control is performed so as to allow the output of radio waves only for the time. Therefore, even when applied to a locker system in which a large number of reader / writers are arranged adjacent to each other, radio wave interference is prevented and IC card type information recording devices such as non-contact type IC tags, IC cards, wristbands, etc. Can reliably communicate with each other.
[0029]
A higher-level controller sends a communication permission command to each reader / writer at the same time, and the lower-level reader / writer CPU calculates timing that does not overlap with other stations based on its own channel number. It can also be configured to reduce the burden on the host controller.
[0030]
【The invention's effect】
As described above, according to the non-contact type locking / unlocking control device of the present invention, even when a plurality of transmission / reception means are arranged close to each other as in the case of locking / unlocking control of the locker door, Since the number of transmission / reception means outputting radio waves can be limited to only one at such timing, radio wave interference can be eliminated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a reader / writer in a non-contact type locking / unlocking control apparatus.
FIG. 2 is a block diagram showing a configuration of an upper controller.
FIG. 3 is a diagram illustrating a control flowchart of a reader / writer.
FIG. 4 is a diagram showing a control flowchart of a controller.
[Explanation of symbols]
1 ... antenna 2 ... CPU
3 ... Channel setting circuit 4 ... Upper communication driver circuit 5 ... Communication controller 6 ... AND circuit 7 ... Transmission circuit 8 ... Reception circuit

Claims (2)

In a non-contact type locking / unlocking control device for locking / unlocking a plurality of electric locks arranged close to each other by remote control,
Remote control means electromagnetically coupled to the electric lock and remotely controlling each electric lock by transmitting specific key data;
A transmission / reception antenna that is provided for each electric lock, transmits a read command for the key data to the remote control means, and receives the key data from the remote control means;
A transmission circuit for modulating and amplifying the read command;
A receiving circuit for amplifying and demodulating the key data;
A gate circuit provided between the transmission circuit and the transmission / reception antenna for each electric lock;
Upper control means for notifying a communication permission command so as to turn on the gate circuit for a predetermined time at different timings with each electric lock ;
Timing control means for permitting transmission of the read command based on the communication permission command notified from the higher-level control means, and for controlling on / off of the gate circuit so that the key data is received by the transmission / reception antenna;
A non-contact type locking / unlocking control apparatus comprising:   2. The contactless locking / unlocking control apparatus according to claim 1, wherein the remote control means is an IC card type information recording apparatus that outputs key data for the electric lock in response to the read command. .

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