JPH05282318A - System for controlling lock through optical cable - Google Patents

Abstract

PURPOSE:To eliminate the possibility of the malfunction of the connection signal line of a controller with the electric lock of a door due to a noise from an outside by connecting the transmission line of a signal for controlling the opening or closing of the lock from the controller to the door with an optical cable. CONSTITUTION:An electric lock control part 6 receives an input from an ID card reader 11, collates it to a room entrance/exit management information 5 transmitted from a host device 4, judges the propriety of the opening or closing of a door 2, thereby the judged result is informed a control side half-duplex communication control part 12a. The control side half-duplex communication control part 12a operates a half-duplex communication with a door side half-duplex communication control part 15a, and informs of the opening or closing of the door 2. At that time, a control side light transmitting and receiving module 13a converts an electric signal into an optical signal, and transmits it through a one-core optical cable 20a to a door side light transmitting and receiving module 14a. The door side light transmitting and receiving module 14a converts the optical signal into the electric signal, and transmits it to the door side half-duplex communication control part 13a. The one-core optical cable 20a can be used, since the half-duplex communication is adopted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock control system using an optical cable. The entrance / exit management system and security system are positioned as one of the subsystems of the intelligent building system, but normally, electric wires are used for the connection signal line between the terminal device and the electric lock of the door,
An electrical signal line is not preferable because it may malfunction due to external noise such as lightning and static electricity. In addition, it is not preferable from the viewpoint of generating unnecessary radio wave radiation.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a lock control system which is a part of a conventional room entry / exit management system. In the figure, 1
An ID card reader 1 reads a record of an ID card for inputting information for identifying an individual, and is provided near a door for controlling entry / exit.

Reference numeral 2 is a door for restricting entry and exit of a person. A control device 3 opens and closes the door 2 by the output of the ID card reading device 11. Reference numeral 4 denotes a host device, which gives the control device 3 entry / exit management information 5. Entry / exit management information 5 is referred to in order to inspect the validity of the entered information.

Reference numeral 6 denotes an electric lock control unit, which is an electric lock for the door 2.
It controls the opening and closing of 8. Reference numeral 7 denotes an electric lock driving unit that drives the electric lock 8 of the door 2. An electric lock 8 limits the opening and closing of the door 2. Reference numeral 9 denotes a power supply, which supplies the electric lock drive unit 7 with a drive current for the electric lock 8 and also supplies electric power to other portions.

FIG. 6 is a view for explaining the interface between the electric lock drive section and the electric lock. A relay drive current for driving the electric lock 8 of the door 2 is supplied from the electric lock drive section of the control device 3 to the door 2, and a contact signal for notifying the state of the electric lock 8 of the door is supplied to the door 2. Comes from lock 8. Also, the power supply 9 is only on the control device 3 side.

In this lock control system, a host device
Information regarding the qualifications for entering and leaving the room managed by the control device 3 from the control device 3 is distributed in advance as entry / exit management information 5 and stored in the control device 3.

A person who wants to open and close the door 2 to enter or leave the room causes the ID card reader 11 to read the ID card.
The electric lock controller 6 uses the ID card information to enter / exit the room management information 5
The electric lock drive unit 7
Instruct to open and close the electric lock 8. When the door is opened, the relay drive current that drives the electric lock 8 on the door 2 is supplied. At this time, the door 2 can be opened and closed freely and you can enter and leave the room arbitrarily.

When the door is not opened, the relay drive current for driving the electric lock 8 is not supplied and the door 2 cannot be opened. Further, as a contact signal for notifying the state of the electric lock 8 that the door 2 has been opened, it reaches the electric lock control unit 6 from the electric lock 8 of the door 2 through the electric lock drive unit 7 and enters the host device 4. Reported as a leaving record.

As described above, in the conventional electric lock control system, the electric wire is used to connect the control device 3 and the electric lock 8 of the door 2.

[0010]

In the conventional electric lock control system, an electric wire is used as a connection signal line between the control device and the electric lock of the door, and if the electric signal line is lightning, static electricity, It is not preferable because it may malfunction due to external noise such as. Further, it is not preferable from the viewpoint of generating unnecessary radio wave radiation. In view of such a point, the present invention eliminates the possibility that the connection signal line between the control device and the electric lock of the door may malfunction due to noise from the outside, and eliminates the possibility of generating unnecessary radio wave radiation. The purpose is to provide.

[0011]

The above-mentioned problems can be solved by a lock control system using an optical cable constructed as follows. FIG. 1 is a principle diagram of the present invention.

An input device 31 for inputting identification information, a door 2 having a lock 38 for opening and closing, and an output of the input device 31 for locking the lock.
A lock control system comprising a control device (3) for opening and closing the door (38), and the optical cable (20) is used as a line for transmitting a signal for controlling the opening and closing of the lock from the control device (3) to the door (2).

[0013]

[Operation] By using the optical cable 20 as a line for transmitting a signal for controlling opening / closing of the lock 38 from the control device 3 to the door 2,
It is possible to prevent the connection signal line between the control device and the electric lock of the door from malfunctioning due to noise from the outside, and to eliminate the possibility of unnecessary radiation of radio waves.

The signal line connecting the control device and the electric lock of the door malfunctions due to noise from the outside because a noise current or noise voltage is generated in the signal line from the outside by electromagnetic coupling or electrostatic coupling. If the transmission line between the control device and the door is an optical cable, such a noise current or noise voltage will not be generated, and in addition, noise current or noise voltage will not be generated by electrostatic coupling.

[0015]

2 is a block diagram of a lock control system using an optical cable according to an embodiment of the present invention. In the figure, reference numeral 7a is an electric lock driving section for driving the electric lock 8 of the door 2. Reference numeral 9a is a power source for supplying electric power to each part of the control device 3. Reference numeral 9b is a power source for supplying electric power to each part of the door 2.

Reference numerals 12a and 15a denote a control side half-duplex communication control section and a door side half-duplex communication control section, which control half-duplex communication. Reference numerals 13a and 14a denote a control-side optical transceiver module and a door-side optical transceiver module, which convert an electric signal and an optical signal. Reference numeral 20a is a single-core optical cable for carrying a communication signal between the control device 3 and the door 2. In addition, the same reference numerals as those in FIG. 5 are the same. Also, the same reference numerals are used throughout the drawings.

In the embodiment of the present invention, the electric lock driving portion 7a
Unlike the conventional one, is installed on the door 2 side. Therefore, unlike the conventional method, the relay drive current that drives the electric lock is the power supply 9b inside the door 2.
Supplied from Further, the control device 3 and the door 2 are connected by a single-core optical cable 20a. In addition, the door side half-duplex communication control unit 13a and the door side optical transceiver module 14 are newly added to the door side.
a and a power supply 9b are provided.

An input from the ID card reader 11 is received by the electric lock controller 6 and collated with the entry / exit management information 5 transmitted from the host device 4 as in the conventional case, and it is determined whether the door can be opened or closed and the result is on the control side. Notify the half-duplex communication control unit 12a. The control-side half-duplex communication control unit 12a performs half-duplex communication with the door-side half-duplex communication control unit 15a to notify the opening / closing of the door. At this time, the control side optical transmitter / receiver module 13a converts the electric signal into an optical signal and transmits it through the one-core optical cable 20a to the door side optical transmitter / receiver module 14a.
The optical signal is transmitted to the door side optical transceiver module 14a, which converts the optical signal into an electric signal and passes it to the door side half-duplex communication controller 13a. Since it is half-duplex communication, the single-core optical cable 20a can be used.

The control-side half-duplex communication control unit 12a and the door-side half-duplex communication control unit 13a can be configured by using an LSI such as a protocol controller (hereinafter, referred to as multi-protocol serial controller: MPSC). .. The MPSC controls the serial signal on the connection line and outputs an interrupt signal when the signal is received.

The electric lock driving section 7a drives the electric lock 8 by supplying a solenoid drive current for the electric lock 8 in response to an unlocking or locking instruction from the control device 3. Further, the door state of the electric lock 8, the unlocking, and the locking signal are fetched, and the control device 3 is notified, and the control device 3 notifies the host device 4 of the unlocking result as the entry / exit record.

FIG. 3 is a block diagram of a lock control system using an optical cable according to another embodiment of the present invention. In the figure, 12
Reference numerals b and 15b are a control side full-duplex communication control section and a door side full-duplex communication control section for controlling full-duplex communication.
Reference numerals 13b and 14b denote a control-side optical transceiver module and a door-side optical transceiver module, which convert electrical signals and optical signals. 20b is a pair of optical cables,
It carries communication signals between the control device 3 and the door 2.
In addition, the same reference numerals as those in FIG. 2 are the same.

In this case, the communication between the control device 3 and the door 2 is performed by the full-duplex communication method. Therefore, bidirectional communication can be performed at the same time, which increases the processing capability. However, a pair of optical cables that are communication paths, that is, two signal lines are required. The control side optical transceiver module 13b and the door side optical transceiver module 14b require a circuit corresponding to two signals. The control-side full-duplex communication control unit 12b and the door-side full-duplex communication control unit 15b can be configured by using an LSI such as MPSC as in the case of FIG.

FIG. 4 is a block diagram of a lock control system using an optical cable according to the third embodiment of the present invention. In the figure, 1
Reference numerals 2c and 15c are a control-side general-purpose register and a door-side general-purpose register, which store an electric lock drive request or an electric lock state introduction request and its reply. Reference numerals 13c and 14c denote a control side optical transmission / reception module and a door side optical transmission / reception module for converting an electric signal and an optical signal.
Reference numeral 20c is an optical cable having 5 to 6 cores, which carries a communication signal between the control device 3 and the door 2. Others, Figure 2
Items having the same reference numerals as are the same items.

The electric lock control unit 1 includes a general-purpose register and 5 to 6 optical transmission / reception modules. The control-side general-purpose register 12c is provided by the electric lock control unit 6 of the control device 3 from the ID card reading device 11. The input is judged by the entry / exit control information 5 and the electric lock drive request is written based on the result, or the electric lock state inquiry request is written after writing the drive request.

The control side optical transceiver module 13c converts the electric signal of the bit data of 1 and 0 of the control side general purpose register 12c into an optical signal and sends it out, and the door side general purpose register of the door 2.
The response of the optical signal from 15c is converted into an electrical signal of bit data.

In the door-side general-purpose register 15c in the door 2, the display of the command from the electric lock controller 6 and the electric lock state inquiry notification are written. Door side optical transceiver module 14c
The command of the optical signal from the electric lock control unit 6 is converted into the electric signal of the bit data, and the electric signal of the bit data of the door side general register 15c is converted into the optical signal and transmitted.

The electric lock driving section 7a is a door-side general-purpose register 15c.
The drive current is supplied to the solenoid of the electric lock in response to the unlocking or locking instruction from. Also, the door state of the electric lock, unlocking, and the acquisition of the locking signal are performed, and the control device 3 is notified.

In this case, since there is an optical cable for each type of signal, the structure of the control circuit is simplified.

[0029]

INDUSTRIAL APPLICABILITY According to the present invention, in a room entrance / exit management system and a security system, the connection between the terminal device and the electric lock of the door is electrically insulated by using an optical fiber in terms of lightning, static electricity, unnecessary radio wave radiation and the like. Improves safety and reliability compared to conventional control methods.

Further, in the conventional method, the control device must inevitably supply electric power for driving the electric lock, and when a plurality of electric locks are connected, the magnet of the electric lock is driven. Since a large current capacity is required, extra control such as controlling electric locks in order to reduce power consumption was necessary, but the present invention does not require such control.

Further, since the control device supplies the electric power for driving the electric lock, the capacity of the power supply unit is correspondingly large and the amount of heat generation also increases. When the control device is housed in the wall, heat dissipation is limited, which is not preferable from the viewpoint of thermal design, but in the present invention, the control device does not need to have electric power for driving the electric lock. The device can be made more compact, and it is also advantageous in terms of thermal design.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a block diagram of a lock control system according to an embodiment of the present invention.

FIG. 3 is a block diagram of a lock control system according to another embodiment of the present invention.

FIG. 4 is a block diagram of a lock control system according to a third embodiment of the present invention.

FIG. 5 is a block diagram of a conventional lock management system.

FIG. 6 Interface between electric lock drive unit and electric lock

[Explanation of symbols]

2 Door 3 Control device 4 Host device 5 Entrance / exit management information 6 Electric lock control unit 7, 7a Electric lock drive unit 8 Electric lock 9, 9a, 9b Power supply 11 ID card reader 12a Control side half-duplex communication control unit 12b Control Side full-duplex communication controller 12c Control-side general-purpose registers 13a, 13b, 13c Control-side optical transceiver module 14a, 14b, 14c Door-side optical transceiver module 15a Door half-duplex communication controller 15b Door-side full-duplex communication controller 15c Door-side general-purpose register 20 Optical cable 20a Single-core optical cable 20b Pair of optical cables 20c 5-6-core optical cable 31 Input device 36 Lock control unit 37 Lock drive unit 38 Lock

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroki Kishimoto 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor, Masahiko Okano 1776, Yanoguchi, Inagi City, Tokyo (72) Inventor Makoto Sato, 1776 Yanoguchi, Inagi-shi, Tokyo Inside Fujitsu Kiden Co., Ltd.

Claims (1)

[Claims] 1. An input device (31) for inputting identification information, a door (2) having a lock (38) for opening and closing, and a control device for opening and closing the lock (38) by the output of the input device (31). (3) is a lock control system, characterized in that an optical cable (20) is used as a line for transmitting a signal for controlling opening and closing of the lock from the control device (3) to the door (2). Lock control system using optical cable.