JP2005183120A - Wire for detecting severance of wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire for detecting severance of wire optimal when detecting a wire used for connecting electrical equipment. <P>SOLUTION: The wire 1 for detecting severance of wire used to detect the severance of the wire 2 connecting a controller 3 and an electrical lock 4 is provided to cover the wire 2 between the controller 3 and the electrical lock 4. The wire 1 for detecting severance of wire comprises wire rods containing a conducting wire applied with prescribed voltage, and the prescribed voltage is applied to the conducting wire by the current supply from a power-source part 3a. A severance of wire part 3b detects a change in the voltage applied to the electric wire 1 for detecting severance of wire to detect the severance of wire. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to detection of disconnection of an electric wire connecting between electric devices, and relates to an optimal disconnection detection electric wire used when detecting that the electric wire is disconnected by an external force.

  When electric devices are connected to each other to supply power and input / output various electric signals, various electric wires suitable for the electric devices are used. The electric device using such an electric wire is not limited to a general electric device, for example, there are various sensors such as an electric lock used in an office building, a public facility or a general house, and various sensors such as a monitoring device for monitoring a monitoring area. Used in electrical equipment.

  And as an electric equipment using such an electric wire, the electric lock system currently indicated by the following patent documents 1 is mentioned, for example.

  As shown in FIG. 4, the electric lock system includes an electric lock 52 and an electric lock control unit (not shown) installed on the door 51, and locking and unlocking of the electric lock 52 by electric means installed on the wall. And a locking / unlocking determining means 53 that outputs a control signal for controlling the electric lock 52, and one side of the door 51 is connected to the door frame 55 by a hinge 54. Thereby, the door 51 can be freely opened and closed with respect to the door frame 55. An AC power supply (AC100V or AC200V) is supplied to the locking / unlocking determination means 53 by a power line 56, and a signal is transmitted between the locking / unlocking determination means 53 and the electric lock control unit via the electric wires 57, 58 and the transmission means A. It is supposed to be transmitted.

  In addition to the above-described electric lock, electric wires for inputting and outputting a power source and various signals are employed in a wide variety of electric devices. Here, as an example other than the electric lock, a crime prevention monitoring device installed in an office building or a public facility will be described.

  For example, surveillance equipment for crime prevention uses an infrared sensor that detects infrared rays emitted from an object, etc., uses a hot-wire sensor that detects the temperature difference between the surveillance background and the object, and displays illegal actions as an image or video. Various types are known, such as those using an image sensor for recording as. Such a monitoring device outputs monitoring information from a monitoring unit that monitors illegal acts from the outside to the control unit to monitor the inside of the monitoring area. The monitoring unit and the control unit are connected by an electric wire, and signals such as a power source and monitoring information are input and output between the monitoring unit and the control unit to operate the monitoring device.

Japanese Patent Laid-Open No. 10-025935

  However, in the case of the electric lock system of Patent Document 1, the electric lock system used in the related art has a problem that it does not function normally as an electric lock when it is disconnected by an external force due to disconnection or fraud. In this case, the electric lock system cannot determine whether or not the electric wire is disconnected, and if the electric power necessary for unlocking the electric lock is improperly applied to the electric wire disconnected from the outside during this period, There was a risk that the door was illegally unlocked and the door was opened.

  In addition, in electronic devices that constantly monitor the monitoring area, such as various sensors such as security devices, the crime prevention effect on the monitoring area can be achieved even if measures are taken to stop power supply and monitoring functions by cutting the wires. There was a risk that fraudulent acts could be easily executed.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide an optimal disconnection detection electric wire when detecting a disconnection due to an improper external force with respect to an electric wire connecting between electric devices. It is.

In order to achieve the above-described object, the disconnection detecting electric wire according to claim 1 is used for detecting disconnection of the electric wire connecting between the first electric device and the second electric device,
Based on the change in the voltage applied to the conducting wire, the wire comprising a conducting wire that is provided so as to cover the electric wire between the first electrical device and the second electrical device and to which a predetermined voltage is applied. The presence or absence of disconnection is detected.

The disconnection detecting electric wire according to claim 2 is used for detecting disconnection of the electric wire connecting between the first electric device and the second electric device,
The first electric device and the second electric device are each composed of a conductive wire to which a predetermined voltage is applied, and a wire material including a covering material made of an insulating member in which the electric wire is accommodated in the hollow portion and the conductive wire is embedded. It is provided so as to cover the electric wire over the interval, and the presence or absence of disconnection is detected based on a change in the voltage applied to the conducting wire.

The disconnection detecting electric wire according to claim 3 is used for detecting disconnection of the electric wire connecting between the first electric device and the second electric device,
It is made of a wire including a conducting wire to which a predetermined voltage is applied, and is helically attached to the outer peripheral portion of the electric wire between the first electric device and the second electric device at a predetermined interval, and is applied to the conducting wire. The presence or absence of disconnection is detected on the basis of a change in voltage.

  As described above, according to the present invention, in an electric device that inputs and outputs an electric signal using an electric wire, the wire for detecting disconnection is covered around the electric wire. Thereby, if a predetermined voltage is applied to the conducting wire embedded in the disconnection detecting electric wire, the conducting wire is cut before the electric wire is cut, and the voltage applied to the conducting wire changes. The change in the voltage of the conducting wire makes it possible to easily detect the presence or absence of disconnection, and the abnormality of the electric wire can be monitored immediately. This increases the degree of freedom of the usage environment and application range of the electrical equipment, as well as the electrical equipment. Crime prevention and reliability can be improved.

  In addition, since it is only necessary to provide an electric wire for detecting disconnection so that only the electric wire is not cut, various covering methods such as covering in a lattice shape or attaching a plurality of wires concentrically with the electric wire depending on the use of the electric device. Can be adopted. Thereby, the disconnection detection electric wire can be provided corresponding to the kind and shape of the electric wire, and the disconnection can be reliably detected.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic configuration diagram when a wire for detecting breakage according to the present invention is employed in an electric lock system, FIG. 2 is a partial cross-sectional view of the wire for wire breakage detection according to the present invention in a first embodiment, and FIG. It is a schematic explanatory drawing in the 2nd form of the electric wire for disconnection detection which concerns.

  As shown in FIG. 1, the disconnection detecting electric wire 1 according to the present invention is connected to the first electric device 3 so as to cover the outer periphery of the electric wire 2 connecting the first electric device 3 and the second electric device 4. It is provided over the second electrical device 4. FIG. 1 shows an example of an electric lock system. The first electric device 3 is configured by a controller disposed indoors, and includes a power supply unit 3a, a disconnection detection unit 3b, and a control unit 3c. Further, the second electric device 4 is constituted by an electric lock disposed in the door, and a switching unit such as a driving unit 4a such as a motor or a solenoid and a relay for switching on / off the power supplied to the driving unit 4a. 4b.

  The electric wire 2 forms a transmission line such as a metal wire or glass fiber. In the example of FIG. 1, the electric wire 2 (2A) forming the power supply line for supplying power from the power supply unit 3a to the drive unit 4a, and the contact 4c provided on a part of the power supply line on the electric lock 4 side are turned on / off. An electric wire 2 (2B) forming a drive line for supplying a drive signal to the switching unit 4b to be switched is provided.

  In FIG. 1, the power supply unit 3a supplies power to the disconnection detecting electric wire 1 and the control unit 3c, and supplies power to the electric wire 2 via the control unit 3c. The disconnection detection unit 3b detects the voltage applied to the disconnection detection electric wire 1 and is disconnected before the electric wire 2 is disconnected depending on whether or not the detection voltage is changed (whether the voltage is out of the allowable range). The presence or absence of disconnection of the detection electric wire 1 is detected. The disconnection detection unit 3b outputs an abnormality detection signal to the control unit 3c when the detection voltage changes, that is, when the voltage applied to the disconnection detection electric wire 1 is out of the allowable range. When a signal for permitting unlocking of the electric lock 4 is input from the outside, the control unit 3c controls the input of the switching signal to the switching unit 4b so as to close the contact of the electric wire 2A. Power is supplied to the drive unit 4a via the electric wire 2A. Further, when the abnormality detection signal is input from the disconnection detection unit 3c, the control unit 3c inputs a switching signal to the switching unit 4b to cut off the power supply from the power supply unit 3a to the drive unit 4a, thereby connecting the contact of the electric wire 2A. It is controlled to open.

  Next, the configuration of the first form of the disconnection detecting electric wire 1 of this example will be specifically described with reference to FIG. As shown in FIG. 2, the disconnection detecting electric wire 1 (1A) according to the first embodiment includes a conducting wire 1a, a covering material 1b, and a sheath 1c.

  The conducting wire 1a is formed in a linear shape using a low resistance metal such as copper. One end of the conducting wire 1a is connected to the power supply unit 3a and the disconnection detecting unit 3c, and the other end is grounded. A predetermined voltage is applied to the conducting wire 1a from the power supply unit 3a. The change in the voltage applied to the conducting wire 1a is detected by the disconnection detecting unit 3b.

  In addition, the shape of the conducting wire 1a is not limited to a linear shape, and the shape can be freely set according to the shape of the electric wire 2 and the usage environment.

  The covering material 1b is formed of an insulating member such as synthetic rubber or silicone resin. The covering material 1b is formed in a tube shape having a circular cross section and a hollow portion. An electric wire 2 is accommodated in the hollow portion of the covering material 1b to protect the electric wire 2 from an external force. Moreover, the conducting wire 1a is embed | buried under the coating | covering material 1b. In the example of FIG. 2, a plurality of conducting wires 1 a are embedded in the covering material 1 b at a predetermined interval in the outer peripheral direction.

  In addition, the burying position of the conducting wire 1a with respect to the covering material 1b is not limited to the central portion of the thickness. For example, when the covering material 1b is thick in the concentric direction, it may be embedded at a position close to the outer peripheral direction. In the example of FIG. 2, a plurality of conductors 1 a are embedded, but the same effect can be obtained even if at least one conductor 1 a is embedded depending on the shape, usage environment, and usage of the wires 2 and 1 a. Play.

  The sheath 1c is provided on the outer periphery of the covering material 1b and is applied to the outermost layer of the disconnection detecting electric wire 1. The sheath 1c is made of, for example, a vinyl chloride material or flame resistant polyethylene. The sheath 1c is for preventing damage to the covering material 1b, flooding, and the like.

  The sheath 1c described above is covered with the covering material 1b according to the use environment and application, and can be omitted without being covered.

  Next, the configuration of the second form of the disconnection detecting electric wire 1 of this example will be specifically described with reference to FIG.

  As shown in FIG. 3, the disconnection detecting electric wire 1 </ b> B of the second form is provided so as to cover all the outer peripheral part of the electric wire 2 in the first form, whereas one electric wire is provided on the outer peripheral part of the electric wire 2. It is provided by being spirally attached at a predetermined interval.

  The disconnection detecting electric wire 1B of the second form only needs to have a shape that can be attached to the electric wire 2, and has the same configuration as the disconnection detecting electric wire 1A of the first form described above or an electric wire whose outer periphery is covered with an insulating material. Can be adopted. The disconnection detecting electric wire 1B is provided on the outer peripheral portion of the electric wire 2 by attaching at least one piece in a spiral shape at an interval where only the electric wire 2 is not cut. That is, the disconnection detecting electric wire 1B of the second embodiment is attached at intervals such that the disconnection detecting electric wire 1B is cut before the electric wire 2 is disconnected by an external force. When the disconnection detecting electric wire 1B is formed of a large number of electric wires, one end of each wire is connected to the power supply unit 3a and the disconnection detecting unit 3b, and the other end is grounded.

  In addition, in the disconnection detecting electric wire 1B of the second form, the case where a linear one is spirally attached to the electric wire 2 has been described. However, for example, it is attached in multiple, grid-like or mesh-like Any shape may be used as long as the wire is attached and cut before the electric wire 2.

  Next, a specific usage example of the above-described disconnection detection electric wire 1 will be described with reference to FIG. Here, a case where the disconnection detecting electric wire 1 is employed in an electric lock system will be described as an example. As described above, the electric lock system is roughly configured to include a controller (first electric device 3) and an electric lock (second electric device 4). For example, an entrance hall or a service entrance of an office building or a public facility is used. The electric lock 4 installed on the door is locked and unlocked under the control of the controller 3.

  The electric lock 4 is supplied with power from the power supply unit 3a of the controller 3 via the electric wire 2A when a person who permits the unlocking performs a predetermined unlocking operation. The drive unit 4a is activated and unlocked. Here, there is a possibility that the electric lock is illegally unlocked by cutting the electric wire 2 by an external force and applying a voltage necessary for operating the drive unit 4a to the cut electric wire 2 from the outside.

  In this example, as shown in FIG. 1, the electric wire 2 (2A, 2B) which connects between the controller 3 and the electric lock 4 is previously coat | covered with the electric wire 1 for a disconnection detection. For example, in the first form of disconnection detecting electric wire 1A, a conductor 1a is embedded in a covering material 1b in which the electric wire 2 is accommodated, and a sheath 1c is further formed so as to cover the covering material 1b. When this disconnection detecting electric wire 1A is used, the electric wires 2 (2A, 2B) connecting the controller 3 and the electric lock 4 are accommodated in the hollow portion of the covering material 1b. And each electric wire 1A for disconnection detection which accommodated the electric wire 2 electrically connects the conducting wires 1a which the adjacent disconnection detection electric wire 1A opposes, and makes it one line. In the example of FIG. 2, since there are six conductors 1a, six lines are formed. Then, one end of each line is connected to the power supply unit 3a and the disconnection detection unit 3c, and the other end is grounded. In this state, a voltage is applied from the power supply unit 3a to each conducting wire 1a of the disconnection detecting electric wire 1A.

  If there is an act of disconnecting the electric wire 2 by an external force, the disconnection detecting electric wire 1A covered by the electric wire 2 is cut before the electric wire 2 and the voltage applied to the conducting wire 1a changes. . When the disconnection detection unit 3c detects this change in voltage, a switching signal for disconnecting the power supply line is input from the control unit 3b to the switching unit 4b. The switching unit 4b opens the contact 4c on the electric wire 2A when a switching signal for cutting the power supply line is input from the control unit 3b. Thereby, the power supply to the drive part 4a, such as a motor and a solenoid for unlocking the electric lock 4, is cut off. As a result, the electric lock 4 cannot be locked / unlocked, and unauthorized locking / unlocking of the electric lock 4 can be prevented and the crime prevention effect can be enhanced. In addition, the control part 3c can also output an alarm signal outside simultaneously with performing the control which opens the contact 4a on the electric wire 2A.

  Next, another example in which the breakage detection electric wire 1 of this example is adopted will be briefly described. Here, the first electric device 3 in FIG. 1 constitutes a controller that performs various controls such as monitoring information and power supply of the monitoring device, and the second electric device includes an infrared sensor, an image sensor, and the like that monitor the monitoring region. An example of configuring the monitoring device will be described.

  For example, a variety of sensors such as an infrared sensor and an image sensor are used for monitoring devices used for monitoring office buildings, public facilities, and the like. Here, an image sensor will be described as an example of the monitoring device. The image sensor constantly records and monitors a predetermined monitoring area as a moving image or a still image.

  This image sensor constantly monitors a preset monitoring area, and the image signal being monitored is sent to the controller via an electric wire, but the electric wire connecting between the image sensor and the controller is an external force. If it is disconnected by this, monitoring of the monitoring area becomes impossible, and there is a possibility that an intruder may perform an illegal act during this period.

  Therefore, the disconnection detecting electric wire 1 of this example is previously covered with an electric wire connecting the image sensor and the controller. Thereby, when it is going to cut | disconnect an electric wire, since the electric wire 1 for a disconnection detection is cut ahead of an electric wire, a change arises in the voltage applied to the electric wire 1 for a disconnection detection. And when a controller detects the change of the voltage of the electric wire 1 for disconnection detection, a crime prevention effect can be heightened by outputting an alarm signal to the exterior (for example, monitoring center).

  As described above, the disconnection detection electric wire 1 of the present example is obtained by covering the electric wire 2 with the disconnection detection electric wire 1 in the electric device in which a power source and various signals are input / output via the electric wire 2. The power supply unit 3a and the disconnection detection unit 3b are connected. Thereby, the electric wire 2 can be protected, and when an attempt is made to cut the electric wire 2 by an unauthorized external force, the electric wire 2 for disconnection detection is cut before the electric wire 2 and applied to the electric wire 1 for electric disconnection detection. Since the applied voltage changes, it is possible to easily detect the presence or absence of the disconnection of the electric wire 2 by the change of the voltage, and the abnormality of the electric wire 2 can be monitored immediately. In addition, when the disconnection detector 3b detects a change in voltage, the power (signal) supply to the electric wire 2 is interrupted, so that it is possible to prevent the electric device from being operated illegally. As a result, it is possible to improve crime prevention and reliability with respect to electrical equipment.

  In addition, when an abnormality occurs in the electric wire 2, even if the user is not monitoring, an alarm signal can be immediately output to the monitoring center in accordance with the voltage change of the disconnection detecting electric wire 1, so that the electric device is illegal. Actions can be prevented in advance.

  In addition, since it is only necessary to provide the disconnection detecting electric wire 1 so that only the electric wire 2 is not cut, the electric wires 2 are covered in a lattice shape, for example, depending on the use of the electric equipment, or a plurality of the electric wires 2 are concentrically attached and attached. Various covering methods can be employed. Thereby, the disconnection detection electric wire 1 can be provided corresponding to the kind and shape of the electric wire 2.

  The disconnection detecting electric wire 1 has the same effect regardless of which of the first form and the second form is used. Further, depending on the use environment and application, it can be used freely such as using both the first form and the second form.

  By the way, in the above-described embodiment, the case where the disconnection detection electric wire is provided so as to cover the electric wire used for the wiring of the electric lock system or the monitoring device has been described as an example. As long as the property is required, the present invention is not limited to the above example. For example, in an electric lock system, a breakage detection electric wire can be provided so as to cover a wire between a controller and the electric lock and an electric wire of a current-carrying metal fitting having a function of a door hinge.

  Moreover, with the form mentioned above, it bundles together for every conducting wire (six in the example of FIG. 2) of the several electric wire 1 for a disconnection detection which coat | covers each electric wire 2, and one end of each conducting wire is connected to the power supply part 3a and a disconnection detection part. 3b and the other end is grounded, but one end of each conducting wire is connected to the power supply unit 3a and the disconnection detecting unit 3b to supply power to each conducting wire from the power supply unit 3a and apply a predetermined voltage. It is also possible to adopt a configuration in which a change in voltage applied to each conducting wire is detected by the disconnection detecting unit 3b. According to this configuration, it is possible to detect the presence or absence of disconnection for each electric wire.

It is a schematic block diagram at the time of employ | adopting the electric wire for a disconnection detection which concerns on this invention for an electric lock system. It is a fragmentary sectional view in the 1st form of the electric wire for disconnection detection concerning the present invention. It is a schematic explanatory drawing in the 2nd form of the electric wire for disconnection detection which concerns on this invention. It is a schematic explanatory drawing of an electric lock system.

Explanation of symbols

1 (1A, 1B) Disconnection detection electric wire 1a Conductor 1b Cover material 1c Sheath 2 (2A, 2B) Electric wire 3 First electric device 3a Power supply unit 3b Disconnection detection unit 3c Control unit 4 Second electric device 4a Drive unit 4b Switching unit 4c contact

Claims (3)

Used to detect disconnection of the electric wire connecting between the first electric device and the second electric device,
Based on the change in the voltage applied to the conducting wire, the wire comprising a conducting wire that is provided so as to cover the electric wire between the first electrical device and the second electrical device and to which a predetermined voltage is applied. A disconnection detecting electric wire characterized by detecting the presence or absence of disconnection. Used to detect disconnection of the electric wire connecting between the first electric device and the second electric device,
The first electric device and the second electric device are each composed of a conductive wire to which a predetermined voltage is applied, and a wire material including a covering material made of an insulating member in which the electric wire is accommodated in the hollow portion and the conductive wire is embedded. A wire for detecting breakage, which is provided so as to cover the wire over the gap, and the presence or absence of breakage is detected based on a change in voltage applied to the conducting wire. Used to detect disconnection of the electric wire connecting between the first electric device and the second electric device,
It is made of a wire including a conducting wire to which a predetermined voltage is applied, and is helically attached to the outer peripheral portion of the electric wire between the first electric device and the second electric device at a predetermined interval, and is applied to the conducting wire. An electric wire for detecting disconnection, wherein the presence or absence of disconnection is detected based on a change in voltage.

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