JP2006202193A - Security device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security device in which a line of a detection body of which importance is high, such as an authentication key, is separated from a sensor part so that the state of the line on the detection body side does not affect the sensor part. <P>SOLUTION: A CPU 10a is connected to an input/output part 11 to which a sensor part 150 consisting of a plurality of sensors is connected, and an input/output part 12 to which an authentication key 140 of higher importance than that of the sensor part 150 is connected. The connection to the CPU 10a is made through a LAN coupler 17. The input/output parts 11 and 12 are selected by the LAN coupler 17, and either the sensor part 150 or the authentication key 140 is connected to the CPU 10a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a security device used in a home security system and the like, and in particular, a detection object line such as an authentication key is separated from the sensor unit side, and the line state on the detection object side affects the sensor unit side. The present invention relates to a security device that does not exist.

  In recent years, with the spread of personal computers and the Internet, for example, the occurrence of abnormalities such as gas leaks, fires, illegal intrusions, pet abnormalities, etc. in stores and houses has been notified to concerned parties and residents away from stores and houses. In addition, a security device that enables control of equipment in a store or a house from a remote location has been realized.

  For example, a system that detects an abnormal unlocking of a door key and generates an intrusion alarm (see, for example, Patent Document 1), uses a mobile phone to turn on / off residential equipment from the outside, A control system that locks or unlocks a key by remote control has been proposed (see, for example, Patent Documents 2 and 3).

  FIG. 4 is a block diagram showing a configuration of a conventional security device. The security device 100 includes a CPU, ROM, RAM, and the like, and executes a predetermined control according to a program stored in the ROM, and is connected to the server unit 101 and has an input / output unit with a sensor or the like. Are connected to the I / O unit 110.

  The server unit 101 includes an RS (Recommended Standard) -232C interface circuit, an Ethernet interface circuit connected to the Ethernet (registered trademark) 120, and the like, and RS232C terminals 102A and 102B connected to the RS232C interface circuit. And an Ethernet terminal 103 connected to the Ethernet 120 and an input / output terminal 104 connected to the I / O unit 110.

  The I / O unit 110 includes an input terminal 111 connected to the input / output terminal 104 of the server unit 101, an output terminal 112 to which a sensor 130 that needs to be supplied with power from the I / O unit 110 side, and an entrance An authentication key 140 used for locking / unlocking the door, an input unit 113 to which a sensor unit 150 including a plurality of sensors such as a temperature sensor is connected, and an output unit 114 to which a buzzer 160 and the like are connected.

  The server unit 101 and the I / O unit 110 are accommodated in one housing such as a breaker box, for example, and the authentication key 140 is installed in the vicinity of the entrance door. The sensor unit 150 is installed at a place in the house where it is desired to monitor. The buzzer 160 is installed in a living room, a room, or the like.

  In FIG. 4, when the server unit 101 operates and, for example, the temperature detection value of the temperature sensor of the sensor unit 150 is taken into the I / O unit 110 via the input unit 113, the I / O unit 110 is connected to the input / output terminal. The temperature detection value is transmitted to the server unit 101 via 104. When the server unit 101 determines that the house is away from the state of the authentication key 140 when the temperature detection value received from the I / O unit 110 exceeds the threshold value, the server unit 101 connects to the Ethernet 120 via the Ethernet terminal 103. The information which notifies abnormality to the terminal device which is not illustrated, such as a security company which was done is transmitted. Or the information which notifies abnormality to the terminal device which is not shown in a guard room is transmitted via RS-232C terminal 102A (or 102B). Thereby, an administrator who knows the abnormality can quickly take appropriate measures.

When the server unit 101 determines that an abnormality is detected and the electronic lock is in the unlocked state, the server unit 101 sounds the buzzer 160 via the I / O unit 110 to notify the resident of the occurrence of the abnormality. In this case, the resident can know that an abnormality has occurred in the heater, gas range, bath water, and the like.
JP 2002-190070 ([0018] to [0021], FIG. 1) JP 2001-309067 A ([0012] to [0022], FIGS. 1 to 3) Japanese Unexamined Patent Publication No. 2000-303729 ([0005] to [0010], FIGS. 1 to 3)

  However, according to the conventional security device, the input key 113 connected to the sensor unit 150 is also connected to the authentication key 140 as a detection body having a higher detection importance than the temperature sensor or the like. For this reason, when a line connected to the authentication key 140 is short-circuited by inserting a metal wire or the like into the authentication key 140, a circuit in the I / O unit 110 may be damaged or an abnormal operation may occur. There is. Further, the sensor unit 150 does not function due to an abnormality on the authentication key 140 side.

  Accordingly, an object of the present invention is to provide a security device that separates a highly important detection body line such as an authentication key from the sensor unit side so that the line state on the detection body side does not affect the sensor unit side. There is.

  In order to achieve the above object, the present invention provides a first input / output unit to which one or more sensors are connected, and a second input / output unit to which a detection body having a higher importance than the sensor is connected. A coupler that selectively connects the first and second input / output units; and the one or more sensors and the second input / output that are connected to the first input / output unit by controlling the coupler. There is provided a security device comprising: a control unit that performs monitoring by a detection signal from the detection body connected to the unit.

  According to the security device of the present invention, it is possible to prevent the state of the detection object line such as the authentication key from affecting the sensor unit side.

[First embodiment]
(Security device configuration)
FIG. 1 shows a security device according to a first embodiment of the present invention. The security device 1 includes a sensor server 10 as a main body including a CPU 10a as a control unit, a flash memory 10b, and an SRAM 10c, an input / output unit 11 as a second input / output unit to which an authentication key 140 is connected, a sensor The input / output unit 12 as a first input / output unit to which the unit 150 and the buzzer 160 are connected, the Ethernet terminal 13 to be connected to the Ethernet 120, the input / output unit 14 to which a specific sensor 130 is connected, RS-232C terminals 15A and 15B used for connection with the terminal device.

  The CPU 10a, the flash memory 10b, and the SRAM 10c are mounted on one printed wiring board, and this printed wiring board is housed in one housing. Further, the input / output unit 11, the input / output unit 12, the Ethernet terminal 13, the input / output unit 14, and the RS-232C terminals 15A and 15B are provided on the side surface or the back surface of the casing.

  The sensor 130 is a sensor that is preferably arranged alone without being included in the sensor unit 150 because it is necessary to receive power supply from the sensor server 10 side.

  The authentication key 140 includes, for example, an IC, a button battery, a connector, etc. integrated with a CPU, a memory, an interface, etc., in the main body made of ABS resin, etc., and a recognition completion is displayed at a predetermined position on the outer surface of the main body. LED lamps are provided for this purpose. The authentication key 140 is connected to the input / output unit 11 via the transmission line 16 having a dedicated connector or the like connected to one end.

  The sensor unit 150 includes a temperature sensor, a humidity sensor, an electronic lock, a gas sensor, a door opening / closing sensor, a buzzer, a monitoring camera, and the like. These sensors and the monitoring camera are connected to the input / output unit 12 by dedicated wiring, cables, and the like. Is done.

The buzzer 160 is for alarm output, and is preferably installed in a place where the resident is the longest, such as a living room. In place of the buzzer 160, a lamp or the like can be used.

(Detailed configuration of security device)
FIG. 2 is a block diagram showing a detailed configuration of the sensor server 10 of FIG. The flash memory 10b shown in FIG. 1, the two SRAMs 10c, the input / output units 11 and 12, the Ethernet terminal 13, the input / output unit 14, and the RS-232C terminals 15A and 15B are connected to the CPU 10a.

  Further, the sensor server 10 includes a LAN coupler 17 as a coupler to which the input / output units 11 and 12 are connected, a driver 18A to which the input / output unit 14 is connected, a driver 18B to which the Ethernet terminal 13 is connected, and an RS- An RS-232C driver 19 to which 232C terminals 15A and 15B are connected and an RTC (real time clock) 20 for supplying a clock signal to the CPU 10a are provided, and these are connected to the CPU 10a.

  Further, the sensor server 10 includes a power supply monitoring unit 21A, 21B connected to the two SRAMs 10c, a charge / discharge control unit 22 connected to the power supply monitoring units 21A, 21B, and a secondary battery serving as a backup power source for the two SRAMs 10c. 23, the 8-channel address switch 24 connected to the LAN coupler 17, the photocouplers 25A to 25F and photoMOS 25G and 25H connected to each channel of the address switch 24, and the AC 100V commercial power supply with the power cord 26 A noise filter 27 connected through the noise filter 27, a switching power supply unit 28 that generates DC12V from AC100V supplied through the noise filter 27, and a regulator circuit that generates a predetermined DC voltage stabilized from DC12V by the switching power supply unit 28 29, 30 and Regi And a regulator circuit 31 for generating a predetermined DC voltage stabilized from DC3.3V by regulator circuit 30.

  The LAN coupler 17 selects one of the input / output unit 11 or the address switch 24 under the control of the CPU 10a at a predetermined time interval or as necessary, and transmits information from the connection destination sensor or the authentication key 140 to the CPU 10a. To do. In addition, to prevent mischief, etc., when a predetermined time zone such as nighttime or a predetermined schedule such as long vacation or year-end and new year is set as an operating condition, input / output is performed based on the operating condition. It operates so as not to select the section 11.

  The driver 18B has a circuit configuration for performing transmission control corresponding to the Ethernet protocol. The driver 18A has a circuit configuration for driving the sensor 130 or capturing a detection result. Further, the RS-232C driver 19 has a circuit configuration for performing transmission control of the RS-232C standard.

  The RTC 20 includes a clock circuit that operates the clock in the sensor server 10 even when the power is turned off, and a circuit that generates a clock signal of the CPU 10a.

  The power supply monitoring units 21A and 21B have a circuit configuration that monitors the state of the power supply applied to each SRAM 10c from the regulator circuit 30 and the like, and immediately switches the power supply of the SRAM 10c to the secondary battery 23 when the operating voltage is lower than the operating voltage. .

  The charge / discharge control unit 22 has a circuit configuration for controlling charge / discharge of the secondary battery 23 using an output voltage of the regulator circuit 29 or the like.

  The secondary battery 23 is a rechargeable battery, for example, a button-type battery, and keeps supplying power to the two SRAMs 10c when the switching power supply unit 28 is turned off so that the stored contents are not erased.

  The address switch 24 sequentially switches the photocouplers 25A to 25F and the photo MOSs 25G and 25H so as to make a round in a predetermined time, and acquires data acquired from each sensor connected to the photo couplers 25A to 25F and the photo MOSs 25G and 25H, or The operation of each sensor is checked, and the result is transmitted to the CPU 10a via the LAN coupler 17.

  The photocouplers 25A to 25F have the same specifications and configuration, and are configured to capture data by a light (input side) -electricity (output side) circuit. The photoMOSs 25G and 25H are electrical (input side). -It has the structure which outputs data by the circuit of light (output side).

  The noise filter 27 is configured to remove harmonics from noise entering from the AC100V distribution side.

  The switching power supply unit 28 has a circuit configuration that generates a DC voltage of 12 V stabilized using a dedicated IC by a switching regulator method.

  The regulator circuits 29 and 30 are configured by using a dedicated regulator LSI, and have a circuit configuration that outputs a stabilized DC voltage of + 5.0V and + 3.3V. The regulator circuit 31 has a circuit configuration that outputs a + 1.8V DC voltage stabilized from the output voltage of the regulator circuit 30.

(Security device operation)
Next, the operation of the security device 1 will be described with reference to FIG. 1 and FIG. First, everyone who lives in one residence has an authentication key 140, and personal information corresponding to each authentication key 140 is registered in the SRAM 10c of the sensor server 10 in advance. Corresponding personal information is also registered in the authentication key 140 possessed by each resident.

  When the house is away, the person who goes out inserts the authentication key 140 into a key insertion slot (not shown). As a result of this operation, an electrical signal is generated. This electrical signal is input to the LAN coupler 17 via the input / output unit 11, and is sent to the CPU 10 a at a timing when the LAN coupler 17 selects the input / output unit 11.

  The CPU 10a analyzes the electrical signal from the LAN coupler 17 to recognize the connection of the authentication key 140, and requests the authentication key 140 to transmit data. When the data is sent from the authentication key 140, the CPU 10a stores the data in the SRAM 10c. When the data registered in the flash memory 10b matches the data read from the SRAM 10c, the CPU 10a holds an electronic lock (not shown). Operate and lock the entrance door (not shown). Further, the CPU 10a turns on the LED lamp of the authentication key 140 and notifies the recognition completion. If the data do not match, the CPU 10a blinks the LED lamp of the authentication key 140 to make the key holder recognize that it has not been recognized. After confirming that the LED lamp is turned on, the holder of the authentication key 140 removes the authentication key 140 from the insertion slot.

  In the sensor server 10, after locking the electronic lock, the CPU 10a determines that the house has become unattended based on the locking, and starts indoor / outdoor monitoring. For example, if the opening / closing sensor of the entrance door connected to the photocoupler 25A is operated during monitoring by the sensor server 10, the on / off signal is taken into the CPU 10a via the address switch 24 and the LAN coupler 17. The CPU 10a determines that a person other than the resident has opened the front door from the outside, and sends alarm information to the Ethernet 120 via the driver 18B, or the RS-232C driver 19 and the RS-232C terminal 15A (or 15B) Sends alarm information to an external terminal device, communicates with a security company or mobile phone that has been contracted in advance, and the security company or resident who owns the mobile phone that an abnormality has occurred in the house Is notified by a message or the like.

  In response to the notification from the sensor server 10, the security company takes measures such as dispatching a guard or contacting a police station, a fire station or the like while contacting a contracted security company. As a result, it is possible to minimize damage and to respond quickly to accidents and incidents. When a resident who has a mobile phone receives an alarm, he / she returns to his / her home, or takes measures such as contacting a police station or a fire department.

  Although the above description has been about the door opening / closing sensor, the CPU 10a performs the same processing on other sensors. For example, in the case of a temperature sensor installed in a kitchen, the CPU 10a compares the detected temperature value with a threshold value stored in the flash memory 10b, and if the temperature value exceeds the threshold value, an abnormality is detected. And a buzzer (not shown) installed in the house is sounded to warn the householder. At this time, when the CPU 10a determines that it is absence from the locking of the electronic lock, it notifies the outside as described above.

  On the other hand, when one of the residents returns, the returnee inserts the possessed authentication key 140 into the key insertion slot, and the insertion is notified to the CPU 10a via the input / output unit 11 and the LAN coupler 17. . When the information registered in the flash memory 10b matches the information sent from the authentication key 140, the CPU 10a determines that the key inserter is a genuine resident and unlocks the electronic lock. As a result, the returnee can open the entrance door.

(Effects of the first embodiment)
According to the first embodiment, the following effects are obtained.

(A) Since the system of the authentication key 140 is separated from the line on the sensor side, even if a short circuit occurs between the lines due to mischief such as inserting a metal foreign object into the insertion port of the authentication key 140, the sensor It is possible to prevent the side from being affected and to prevent malfunction.

(B) Since the sensor side and the authentication key 140 side can be separated and connected to the CPU 10a, they can be made less susceptible to the influence of noise between each other.

(C) Since the I / O unit such as the LAN coupler 17, the address switch 24, the driver 17A, etc. is built in the sensor server 10, the current load that has been conventionally connected via the cable of “power supply + signal line” is reduced. it can. As a result, since the voltage drop in the cable can be reduced, the cable can be lengthened, and the sensor can be installed at a location away from the sensor server 10.

(D) Since the I / O unit is built in the sensor server 10, it is not necessary to attach the I / O unit externally as in the prior art, and wiring work for the I / O unit can be eliminated.

(E) Since an external I / O unit as shown in FIG. 4 is not required, and the number of components associated therewith can be reduced, the cost can be reduced.

(F) Since the address switch 24 and the authentication key 140 are connected to the LAN coupler 17 and both are switched by the LAN coupler 17, the operation check of a plurality of sensors can be performed by the address switch 24.

[Second Embodiment]
FIG. 3 is a flowchart showing processing of the security device according to the second embodiment of the present invention. This process is executed by the CPU 10a, and a program to be executed is stored in the flash memory 10b. The hardware in the present embodiment is as shown in FIGS. Note that S in FIG. 3 represents a step.

  In the flash memory 10b, when the security device 1 is intended for home security, the time when the authentication key 140 is disabled, for example, from 12 to 6 in the morning when the resident does not go home or go out Is previously registered as the function stop time Ts. Note that the time is generated by the RTC 20.

  Further, the flash memory 10b stores a control program for keeping the LAN coupler 17 connected to the address switch 24 on the main side when the CPU 10a recognizes the function stop time Ts.

  Next, the process of FIG. 3 will be described. First, the CPU 10a determines whether or not the current time is the set function stop time Ts (S201). When it is determined that the current time is the function stop time Ts, that is, between 12 o'clock in the evening and 6 o'clock in the morning (S201: Y), the circuit connection destination in the LAN coupler 17 is fixed to the address switch 24 (S203). ). In this state, since the circuit between the CPU 10a and the input / output unit 11 is disconnected, the power supply to the authentication key 140 is stopped, and the authentication key 140 stops its function. Therefore, even if the authentication key 140 is inserted into the insertion slot or a short circuit occurs due to mischief or the like, the LAN coupler 17 cannot know at all. On the other hand, since the plurality of sensors of the sensor unit 150 are connected to the LAN coupler 17 via the photocouplers 25A to 25F and the photoMOSs 25G and 25H, monitoring by the sensor unit 150 can be performed constantly (S204).

  On the other hand, when the current time is not the function stop time Ts, that is, when it is determined that it is between 6 am and 12 pm (S201: N), the connection destination of the circuit in the LAN coupler 17 is the address on the main side. A normal operation is performed so that the switch 24 and the input / output unit 11 on the AUX (auxiliary) side are alternately switched at predetermined time intervals (S202), and a monitoring operation for monitoring both the sensor unit 150 and the authentication key 140 is performed. (S204). This monitoring process is as described in the first embodiment.

  Next, it is determined whether or not a predetermined time has passed (S205). If it is determined that a predetermined time has passed (S205: Y), the process returns to S201, and the current time is stopped. It is determined again whether or not it is at time Ts. S202 or S203 is selected according to this determination, and the above-described processing is executed according to the selection. On the other hand, if it is determined that the predetermined time has not elapsed (S205: N), it is determined whether or not the power-off process has been performed (S206). If it is determined that the power-off process has not been performed (S206: N), the process returns to S204, and the monitoring operation is executed. On the other hand, when it is determined that the power-off process has been performed (S206: Y), all the operations of the sensor server 10 are stopped.

(Effect of the second embodiment)
According to the second embodiment, in addition to the effects of the first embodiment, since the power supply to the input / output unit 11 can be stopped during the time period when the authentication key 140 is not used, the input / output unit 11 can be prevented from occurring in advance.

[Other embodiments]
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, although the detection body shows the authentication key 140, it may be another detection body having high importance in the same manner. Specifically, there are IC cards, portable terminals with an authentication function, and the like.

It is a block diagram which shows the security apparatus which concerns on embodiment of this invention. It is a block diagram which shows the detailed structure of the sensor server of FIG. It is a flowchart which shows the process of the security apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the conventional security apparatus.

Explanation of symbols

1 Security Device 10 Sensor Server 10a CPU
10b Flash memory 11, 12 Input / output unit 13 Ethernet terminal 14 Input / output unit 15A, 15B RS-232C terminal 16 LAN coupler 17 Transmission line 18A, 18B Driver 19 RS-232C driver 20 RTC
21A, 21B Power supply monitoring unit 22 Charge / discharge control unit 23 Secondary battery 24 Address switch 25A-25F Photocoupler 25G, 25H PhotoMOS
26 Power cord 27 Noise filter 28 Switching power supply unit 29, 30, 31 Regulator circuit 100 Security device 101 Server unit 102A, 102B RS-232C terminal 103 Ethernet terminal 104 I / O terminal 110 I / O unit 111 Input terminal 112 Output terminal 113 Input Unit 114 output unit 120 Ethernet 130 sensor 140 authentication key 150 sensor unit 160 buzzer

Claims (7)

A first input / output unit to which one or more sensors are connected;
A second input / output unit to which a detection body having a higher importance than the sensor is connected;
A coupler that selectively connects the first and second input / output units;
A controller that controls the coupler to monitor the detection sensor from the one or more sensors connected to the first input / output unit and the detection body connected to the second input / output unit; A security device characterized by comprising.   The security device according to claim 1, wherein the detection body is an authentication key.   2. The security device according to claim 1, wherein the first input / output unit is connected to the coupler via an address switch having a plurality of channels corresponding to the plurality of sensors.   The control unit connects the coupler to the first input / output unit during the time zone when a time zone for cutting off the connection line of the detection body is set. The security device described.   The security device according to claim 4, wherein the control unit sets the time zone to night.   2. The control unit according to claim 1, wherein when the schedule for cutting off the connection line of the detection body is set, the controller connects the coupler to the first input / output unit while the schedule is met. Security equipment.   The security device according to claim 6, wherein the control unit connects the coupler to the first input / output unit based on a date or a period for cutting off the connection line.