JP2009277075A - Electric service interruption detecting device and electronic device system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a checkup of electric service interruption detecting means without necessity for checkup by human. <P>SOLUTION: The electric service interruption detecting device includes a connecting means 11 which is connected to an external power supply 5 and by which electric power is supplied from an external power supply 5, and an electric service interruption detecting means 12 where an electric service interruption detection state transition is made according to a power interruption detection of the external power supply 5 which is connected to the connecting means 11. Furthermore the device includes: a switching means 13 which is located between the connecting means 11 and the electric service interruption detecting means 12 and switches the detecting means 12 tentatively to a state where the power interruption is detected; a failure determining means 14a1 which detects the detecting means 12 to be in the state of a power interruption detection and decides the cause to be a failure of the detecting means 12 when a state of a power interruption detection is not switched by the switching means 13; a notification means 14a2 which notifies a result of failure determined by the failure determining means 14a1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a connection means that is electrically connected to an external power supply and is supplied with power from the external power supply, and a power failure detection state in which a power failure detection state transitions in response to detection of a power failure of the external power supply connected to the connection means. And a power failure detection device having the means and an electronic device system having the power failure detection device.

  An electronic device such as an emergency lighting apparatus shown in Patent Document 1 has a power failure detection unit that detects a power failure of an external power source and a battery that is charged by an external power source during normal use, and the power failure detection unit detects a power failure. It is known to operate by supplying power from a battery.

  As an example of such a power failure detection means, a configuration shown in FIG. 5 is known. In FIG. 5, a transistor is used for the power failure detection means 100. In the power failure detection means 100, an external power supply 5 is electrically connected to a base via a resistor 101, a backup power source 110 is electrically connected to a collector via a pull-up resistor 102, and a port 120 is electrically connected to an emitter. It is connected to the. A power failure detection port 130 is electrically connected between the collector of the power failure detection means 100 and the pull-up resistor 102.

  When there is power supply from the external power source 5, the power failure detection means 100 is turned on and the collector is turned on. Therefore, the power failure detection port 130 is in the LO state during normal times when power is supplied from the external power supply 5. The power supply 110 with backup has a capacitor that is charged by the external power supply 5 or the like in a normal state, and supplies power by the capacitor during a power failure.

Further, when the power supply from the external power supply 5 is cut off during a power failure, the power failure detection means 100 also turns off the collector by turning off the base. Then, the power failure detection port 130 changes from the LO state to the HI state by the power source 110 with backup and the pull-up resistor 102. By configuring the power failure detection means 100 in this manner, the power failure occurrence status can be determined based on the state change of the power failure detection port 130.
JP 2006-140067 A

  However, when a transistor is used for the power failure detection means 100 as described above, if a short circuit failure occurs between the collector and the emitter, the state of the power failure detection port 130 does not change in any case. The problem that it cannot be detected occurs. When the power failure detection means 100 is incorporated in an electronic device related to safety such as a gas shut-off valve unit or an alarm device, the electronic device cannot perform a recovery operation for ensuring safety in the event of a power failure. In case it could cause a gas leak accident.

  For this reason, inspection of the power failure detection means 100 has been studied, but since it is necessary for an inspection operator or the like to actually turn off the external power source 5 in order to perform this inspection, even if the inspection can be realized, There was a problem that it could not be performed frequently such as several times. However, when the electronic device is a device related to safety, if the power failure detection means 100 breaks down during the inspection work, the electronic device does not operate normally, which causes a problem that it is not preferable for safety.

  Therefore, in view of the above-described problems, an object of the present invention is to provide a power failure detection device and an electronic device system that can perform a power failure detection means inspection without requiring a human inspection work.

  In order to solve the above problems, the power failure detection device according to claim 1, which is made according to the present invention, is electrically connected to an external power source 5 and supplied with power from the external power source 5 as shown in the basic configuration diagram of FIG. 1. In the power failure detection apparatus, the power failure detection device has a connection means 11 to be performed and a power failure detection means 12 that transitions to a power failure detection state in response to detection of a power failure of the external power source 5 connected to the connection means 11. A switching unit 13 that is interposed between the power failure detection unit 12 and that artificially switches the power failure detection unit 12 to a power failure detection state, and detects a power failure detection state of the power failure detection unit 12, and the power failure detection unit 12 detects the power failure detection state. A failure determination unit 14a1 for determining a failure of the power failure detection unit 12 when the detection state is not switched, and a failure determination result by the failure determination unit 14a1 are notified. That the notifying means 14a2, and having a.

  According to the power failure detection device of the present invention described in claim 1, the switching means 13 is in the state where the power failure detection means 12 has not detected a power failure of the external power source 5 connected to the connection means 11. Is switched to the power failure detection state in a pseudo manner. When the failure determination unit 14a1 does not switch to the power failure detection state, it is determined that the power failure detection unit 12 has failed, and the notification unit 14a2 notifies the determination result.

  In order to solve the above problems, an electronic device system according to claim 2 made according to the present invention has the power failure detection device 10 according to claim 1 as shown in the basic configuration diagram of FIG. It operates by supplying power, and performs a predetermined recovery operation for ensuring safety when the power failure detection device 10 detects a power failure of the external power supply 5.

  According to the electronic device system of the present invention described in claim 2, the power failure detection unit 10 artificially switches the power failure detection unit 12 to the power failure detection state at a predetermined interval, thereby the power failure detection unit 12. Automatically detects and notifies of malfunctions. And if the power failure detection apparatus 10 detects the power failure of the external power supply 5, the electronic device system 1 will perform the predetermined | prescribed restoration operation | movement for ensuring safety. Examples of the predetermined restoration operation include restart of the device and confirmation of safe operation.

  As described above, according to the power failure detection device of the present invention described in claim 1, when the power failure detection means is switched to the power failure detection state in a state in which the power failure of the external power source is not detected and is not switched. Therefore, it is no longer necessary for the inspection operator to shut down the power supply from the external power supply to the power failure detection device and perform the inspection periodically or irregularly. The power failure detection means can be automatically checked. Moreover, since the power failure detection means can be frequently inspected, a failure of the power failure detection means can be detected quickly, which can contribute to improvement of maintenance. Therefore, the power failure detection means can be inspected without requiring human inspection work, so that a power failure of the external power source can be detected reliably. In addition, since the failure of the power failure detection means is notified, the inspection operator or the like can specify the failed part and can be reused after repair.

  As described above, according to the electronic device system of the present invention described in claim 2, the power failure detection device capable of automatically checking the power failure detection means is provided, and the power failure detection device detects a power failure of the external power supply. Since the specified recovery operation to ensure safety is performed at the time, the recovery operation can be performed reliably in response to the occurrence of a power failure of the external power supply. It can be prevented in advance. Therefore, an accident of the electronic device system due to a power failure of the external power supply can be prevented in advance, which can contribute to improvement of the system quality.

  Hereinafter, one embodiment in the case of applying an electronic device system having a power failure detection apparatus according to the present invention to a gas security system will be described below with reference to the drawings of FIGS.

  In FIG. 2, the gas security system 1 corresponds to the electronic device system shown in FIG. 1, and shuts off the gas supply path by the operation device 10 provided in the house and the like, and incorporated in the gas supply path and controlled by the operation device 10. And a shutoff valve unit 20 to be configured. The operating device 10 is electrically connected to the external power supply 5 and the shutoff valve unit 20, operates with the power supplied from the external power supply 5, and supplies the power to the shutoff valve unit 20. .

  In addition, although this embodiment demonstrates the case where the operating device 10 is functioned as a power failure detection apparatus of this invention, this invention is not limited to this, What is the operating device 10 implement | achieved by the cutoff valve unit 20? Various embodiments such as incorporation into a system as another dedicated device can be made. Although the case where the external power source 5 is a commercial power source will be described, various power sources such as a battery and a power supply device according to the embodiment can be used.

  As shown in FIG. 3, the operation device 10 includes a connection unit 11, a power failure detection unit 12, a switching unit 13, a control unit 14, an output unit 15, and an operation unit 16. Yes.

  The connection means 11 uses a power supply circuit or the like, and is electrically connected to the external power supply 5 and supplied with power from the external power supply 5. And the connection means 11 operates them by supplying the electric power to the control part 14 or the output part 15 grade | etc.,.

  As the power failure detection means 12, a transistor, a photocoupler, a relay or the like can be arbitrarily used. In the present embodiment, a case where the power failure detection means 12 is a transistor will be described. In the power failure detection means 12, the connection means 11 is electrically connected to the base via the resistor R1, the backup power source 10a is electrically connected to the collector via the pull-up resistor R2, and the port 10b is electrically connected to the emitter. It is connected to the. Further, an input port (power failure detection port) 14d of the control unit 14 is electrically connected between the collector of the power failure detection means 12 and the pull-up resistor R2.

  The backup power source 10a uses a capacitor or the like, and supplies power to the control unit 14 by discharge for a predetermined time (for example, a few minutes) when a power failure occurs in the external power source 5.

  As the switching unit 13, a transistor, a photocoupler, a relay, or the like can be arbitrarily used. In the present embodiment, a case where the switching unit 13 is a transistor will be described. In the switching means 13, the output port 14e of the control unit 14 is electrically connected to the base via the resistor R3, the intermediate point of the base of the connection means 11 and the power failure detection means 12 is electrically connected to the collector, and the port is connected to the emitter. 10c is electrically connected.

  The power failure detection means 12 and the switching means 13 configured as described above operate as follows. First, when power is supplied from the external power supply 5, the base of the power failure detection means 12 is turned on and the collector potential falls to LO. Therefore, during normal times, the input port 14d of the control unit 14 is in the LO state.

  In addition, when performing the inspection at the normal time, when the base is turned on by the control of the control unit 14, the switching unit 13 causes a current to flow from the emitter to the collector, the power failure detection unit 12 (transistor) is turned on, and the collector potential is The voltage drops to near 0V, and a pseudo power failure occurs.

  Furthermore, when the power supply from the external power supply 5 is cut off at the time of a power failure, the power failure detection means 12 turns off the collector by turning off the base. Then, the pull-up resistor R2 changes the input port 14d of the control unit 14 from the LO state to the HI state. Therefore, the control unit 14 can determine the occurrence of a power failure of the external power supply 5 by changing the state of the input port 14d.

  The control unit 14 is composed of a microcomputer including a known CPU (central processing unit) 14a, ROM (read only memory) 14b, and RAM (optional read / write memory) 14c. The ROM 14b stores various programs for causing the CPU 14a to function as the failure determination unit 14a1 and the notification unit 14a2 in the claims shown in FIG. The RAM 14c appropriately stores data necessary for the CPU 14a to execute various processes.

  The ROM 14b stores a recovery operation program for requesting the shut-off valve unit 20 to perform a predetermined recovery operation for ensuring safety when the power failure detection means 12 detects a power failure of the external power supply 5. The CPU 14a transmits a shutoff valve shutoff request to the shutoff valve unit 20 by executing the recovery operation program.

  The output unit 15 is electrically connected to the output port 14f of the control unit 14, and is configured to be able to display or output an alarm sound in response to a request from the control unit 14. Although not shown, the output unit 15 includes a display unit that performs various displays by turning on LEDs corresponding to power failure detection, failure detection, inspection, and the like.

  The operation unit 16 is electrically connected to the input port 14g of the control unit 14, and has a plurality of operation switches for allowing a user, an operator, and the like to input and select various data. The operation unit 16 outputs an operation signal corresponding to the operation on these operation switches to the control unit 6.

  Next, an example of the power failure detection inspection process executed by the CPU 14a described above will be described below with reference to the flowchart shown in FIG. In addition, this power failure detection inspection process has shown an example of the process outline | summary in case the power failure detection means 12 is regularly inspected (for example, once a day, several times a month, etc.).

  When the power failure detection inspection processing program stored in the ROM 14b is executed by the CPU 14a activated by the power supply from the external power source 5, it is determined in step S11 whether or not it is a predetermined inspection timing. In addition, as a determination method of the inspection timing, various different methods can be used such as determination based on a time acquired from a clock IC built in the control unit 14 and a set time, or determination using a timer function.

  If it is determined in step S11 that it is not the inspection timing (N in S11), this determination process is repeated to wait for the inspection timing. On the other hand, when it is determined that it is the inspection timing (Y in S11), the output port 14e is turned on in step S12 to turn on the base of the switching unit 13, and the process proceeds to step S13.

  In step S13, the failure determination process of the power failure detection unit 12 is executed, so that the ON / OFF state of the power failure detection unit 12 is detected from the input port 14d, and whether or not the power failure detection state is based on the state. When it is detected that it has been detected and switched to the power failure detection state, it is determined to be normal, and when it is detected that it has not switched to the power failure detection state, it is determined that the power failure detection means 12 is out of order. The data is stored in the RAM 14c, and then the process proceeds to step S14.

  In step S14, based on the determination result of the RAM 14c, it is determined whether or not the power failure detection means 12 is determined to be faulty. If it is not determined that there is a failure (N in S14), the process returns to step S11, and a series of processing is repeated. On the other hand, when it is determined that there is a failure (Y in S14), in step S15, notification information for notifying the failure of the power failure detection means 12 is created in the RAM 14c, and the output of the notification information is requested to the output unit 15. As a result, the failure detection LED corresponding to the notification information is turned on by the output unit 15, and then the processing ends.

  As described above, the CPU 14a performs the power failure detection and inspection process shown in FIG. 4 so that the CPU 14a functions as a failure determination unit and a notification unit in the claims. Step S13 corresponds to failure determination means, and step S15 corresponds to notification means. In addition, when a notification means notifies both normality and a failure as notification information, it can implement | achieve by deleting FIG. 14 of the said flowchart.

  Next, the shut-off valve unit 20 is configured to operate with electric power supplied from the operation device 10 described above. Although not shown, the shut-off valve unit 20 includes a shut-off valve incorporated in the gas supply path and a control device that controls valve opening / closing of the shut-off valve. The shutoff valve is driven by a valve open / valve close signal from the control device to open / close the gas supply path. When the control device receives a shutoff request from the operation device 10 described above, it outputs a valve close signal to the shutoff valve to close the shutoff valve.

  Next, an example of operation | movement (action) of the operating device 10 in the gas security system 1 of the structure mentioned above is demonstrated below.

  The operating device 10 activated by the power supply from the external power source 5 supplies the power to the shutoff valve unit 20 and monitors the power failure of the external power source 5 based on the state change of the power failure detection means 12. And if the operating device 10 detects the power failure of the external power supply 5, it will transmit the interruption | blocking request | requirement to the cutoff valve unit 20 as one of the recovery operation for ensuring safety at the time of a power failure occurrence. Thus, since the shutoff valve unit 20 shuts off the shutoff valve to shut off the gas supply path, it is possible to prevent the occurrence of an accident in which a gas leak accident due to a power failure cannot be found.

  Moreover, the operating device 10 switches the power failure detection means 12 to a power failure detection state in a pseudo manner by periodically turning on the switching means 13. And when it switched to the power failure detection state, but can be detected, it determines with the power failure detection means 12 operating normally, and will be in a standby state. On the other hand, when it is detected that the power failure detection means 12 is not switched to the power failure detection state due to a failure or the like of the power failure detection means 12, notification information indicating the occurrence of the failure of the power failure detection means 12 is output (displayed) from the output unit 15. Therefore, the user or the like can recognize the failure of the power failure detection means 12 from the notification information, and can make arrangements promptly.

  According to the operation device 10 described above, the power failure detection means 12 is switched to the power failure detection state in a state where the power failure of the external power source 5 is not detected, and it is determined that the power failure detection means 12 has failed when the power failure detection means 12 is not switched. Therefore, it is not necessary for the inspection operator to cut off the power supply from the external power supply to the operation device 10 and perform the inspection, and the power failure detection means 12 is automatically inspected periodically. be able to. Moreover, since the power failure detection means 12 can be frequently inspected, a failure of the power failure detection means 12 can be detected quickly, which can contribute to improvement of maintenance. Therefore, since the power failure detection means 12 can be inspected without requiring human inspection work, a power failure of the external power source 5 can be reliably detected. Further, since the failure of the power failure detection means 12 is notified, the inspection operator or the like can specify the failed part and can be reused after being repaired.

  Moreover, according to the gas security system 1, it has the operating device 10 which can check the power failure detection means 12 automatically, and when the operating device 10 detects the power failure of the external power supply 5, in order to ensure safety Since the predetermined restoration operation is performed, the restoration operation can be surely performed in response to the occurrence of a power failure of the external power source 5, so that an accident due to the failure of the power failure detection means 12 can be prevented in advance. . Therefore, since the accident of the gas security system 1 due to the power failure of the external power source 5 can be prevented, it can contribute to the improvement of the system quality.

  In addition, although this embodiment mentioned above demonstrated the case where the notification part which shows the failure of the power failure detection means 12 was notified by the output part 15, this invention is not limited to this, For example, using a communication apparatus Various embodiments such as notification by transmitting notification information to a predetermined transmission destination can be made.

  The power failure detection device of the present invention can be applied to devices having a power failure detection function in addition to the operation device 10 described above. For example, a fire alarm device, a gas leak alarm device, an emergency lighting device, etc. Is mentioned.

  As described above, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows the basic composition of the power failure detection apparatus and electronic device system of this invention. 1 is a system configuration diagram showing a schematic configuration of a gas security system to which the present invention is applied. It is a block diagram which shows an example of schematic structure of the operating device in FIG. It is a flowchart which shows an example of the power failure detection inspection process which concerns on this invention which CPU performs in FIG. It is a figure for demonstrating an example of the conventional power failure detection means.

Explanation of symbols

1 Electronic equipment system (gas security system)
5 External power supply 10 Power failure detection device (operation device)
DESCRIPTION OF SYMBOLS 11 Connection means 12 Power failure detection means 13 Switching means 14a1 Failure determination means (control part)
14a2 Notification means (control unit)

Claims (2)

A connection means that is electrically connected to an external power source and is supplied with power from the external power supply; and a power failure detection means that transitions to a power failure detection state in response to detection of a power failure of the external power source connected to the connection means. In the power failure detection device that has
A switching means interposed between the connection means and the power failure detection means and switching the power failure detection means to a power failure detection state in a pseudo manner;
A failure determination means for detecting a power failure detection state of the power failure detection means and determining a failure of the power failure detection means when the power failure detection state is not switched by the switching means;
Notification means for notifying the result of failure determination by the failure determination means;
A power failure detection device characterized by comprising:   2. The power failure detection device according to claim 1, wherein the power failure detection device operates by supplying power from an external power source, and performs a predetermined recovery operation for ensuring safety when the power failure detection device detects a power failure of the external power source. An electronic device system characterized by that.

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