JP4237765B2 - Anti-theft alarm device for dam management device - Google Patents

Description

  At various dams, in order to notify discharge areas, etc. to specified areas, an alarm station is set up in the river basin where the dam is installed, and an alarm is sent to the alarm station from the monitoring station installed at the dam site. Yes. The present invention relates to a theft prevention alarm device of a dam management device for preventing the alarm station from being stolen.

The various dams installed in the river detect the dam's water level, inflow water amount, discharge amount, rainfall amount, etc., and if it exceeds the predetermined amount, the monitoring staff provided at the dam site etc. will judge, May increase water discharge.
In this case, it is necessary to evacuate local residents, anglers, and campers in the river because rainfall is observed at the upstream of the dam, and the water volume and water level increase drastically at the downstream. . For this reason, a dam management device in which a monitoring device for monitoring the state of a dam and a warning device for transmitting a warning to a predetermined area in response to a report from the monitoring device is provided in a river basin (for example, , See Patent Document 1).

The place where this monitoring device is installed often has a monitoring staff, so there is little theft or damage, and even if the theft or damage occurs, it can be immediately detected and dealt with.
However, since the alarm device is widely installed in the river basin, it is unattended and it is difficult to keep the eyes of monitoring sufficiently. Moreover, it is scattered in a wide area and includes expensive equipment such as solar cells and wireless devices. Therefore, this alarm device is often theft or damage.

If the alarm device is stolen or damaged, the alarm transmitted from the monitoring device cannot be transmitted to people in the river basin, which may cause a serious problem.
On the other hand, as described above, the alarm devices are scattered in a wide area, and it requires a lot of manpower and a large amount of money to constantly monitor the presence or absence of theft or damage.
In addition, such theft occurs in other places, and a prevention device has been devised. For example, in order to prevent theft of materials placed at construction sites, an anti-theft alarm device that attaches a magnet wire to the asset and when the magnet wire is disconnected, the sensor works and sends a warning signal to the mobile phone. Has also been proposed. However, in the dam alarm devices, there are places far away from each other, and there are places where mobile phones can not communicate, and because they are not visible to the human eye, they can be easily stolen, and simple electric wires can be used without generating warning signals. (For example, refer to Patent Document 2).
JP 2003-234849 A JP 2002-373390 A

  For this reason, the present invention provides an antitheft device that can easily prevent the alarm device from being stolen or damaged with a relatively simple device.

The present invention of claim 1 for solving the above-mentioned problems is a monitoring station that monitors the state of a dam and issues an alarm in a predetermined case, and receives an alarm from the monitoring station to notify the surrounding area of the alarm issue. In a dam management device having an alarm station, the alarm station includes at least an alarm station receiver that receives an alarm from the monitoring station, an alarm station display / detection device that detects and displays the status of the alarm station, and an alarm station to the monitoring station The alarm station transmitter that sends an alarm to the alarm station and the alarm station connected to each device constituting the alarm station and the alarm station display / detection device are connected with an alarm cable. Disconnection detection circuit that connects the station display / detection device in a normally energized state, and short circuit detection that connects each device constituting the alarm station and the alarm station display / detection device in a non-energized state with a predetermined voltage constantly applied Circuit Includes a circuit, if any of its there is a danger of theft by cutting circuit abnormality occurs, detects an abnormal state of the alarm station,
The alarm station display / detection device receives and displays the abnormal signal of the disconnection detection circuit or the short circuit detection circuit, notifies the surrounding area of the abnormality, and simultaneously notifies the monitoring station of the abnormal condition of the alarm station from the alarm station transmitter. When an abnormality is transmitted from the alarm station to the monitoring station, the monitoring station displays the alarm and the alarm content on the display screen. The anti-theft alarm device for a dam management device is characterized in that at least two or more warnings are printed on the dam.

According to the present invention of claim 1, in the dam management device, the alarm station includes at least an alarm station receiver that receives an alarm from the monitoring station, an alarm station display / detection device that detects and displays the status of the alarm station, and an alarm. An alarm station transmitter for transmitting an alarm from the station to the monitoring station is provided. For this reason, it is possible to accurately notify the residents of the dam basin via a warning station that is remote from the monitoring station, as well as timely information from the warning station to the monitoring station. Lee can be reported accurately.
To detect the abnormal state of the alarm station, connect each device that makes up the alarm station to the alarm station display / detection device with an alarm cable, and the alarm cable displays and detects each device that makes up the alarm station. Two circuits: a disconnection detection circuit that connects the device in a normally energized state, and a short-circuit detection circuit that connects each device constituting the alarm station and the alarm station display / detection device in a non-energized state when a predetermined voltage is always applied. When an abnormality occurs in any of the circuits, the abnormality is detected. Therefore, it is possible to detect an abnormal state not only when the wires connected to the respective devices (parts) constituting the alarm station are simply cut, but also when the circuit is short-circuited by cutting with a nipper or the like. An abnormal state can be detected reliably.

Since the alarm station, the alarm station display and detecting device abnormality signal disconnect sensing circuit or short circuit detection circuit an abnormal condition alarm station that receives, which by detection knowledge can inform the abnormality to the surrounding area, alarm Abnormal conditions such as theft or malfunction of station parts can be detected by the alarm station itself and immediately notified to the surrounding area, and theft of parts can be prevented and early recovery of malfunctions can be achieved.
Since the alarm station transmitter can send an alarm of the abnormal state of the alarm station to the monitoring station, the alarm station can be monitored at a monitoring station away from the alarm station, and the abnormal state of the alarm station can be monitored. You can know immediately and take immediate action for abnormal conditions.
When an abnormality is transmitted from the alarm station to the monitoring station, the monitoring station warns the monitoring station alarm display device that the alarm sound is sounded, the abnormal lamp is lit, and the display screen and the details of the alarm are printed on paper. At least two warnings are issued. For this reason, it is possible to reliably detect the alarm regardless of the state of the monitoring station monitor, and to deal with the abnormal state.

The present invention of claim 2 is an anti-theft alarm device for a dam management device in which communication between a monitoring station and an alarm station is performed by wireless communication.

In the present invention of claim 2 , since the communication between the monitoring station and the alarm station is performed by wireless communication, there is no fear of disconnection on the way even in a remote place, maintenance is easy, equipment is inexpensive, and reliable. An alarm can be issued.

The present invention of claim 3 is an anti-theft alarm device for a dam management device in which the method of notifying the surrounding area of the alarm station is the generation of an alarm sound and the lighting of a sensor light.

In the present invention of claim 3, since the method of notifying the surrounding area of the alarm station is the generation of the alarm sound and the lighting of the sensor light, the abnormal state can be reliably detected in the vicinity of the alarm station in the daytime or at night. It is possible to notify, especially at night, far away, and it is excellent in warning and theft prevention.

The present invention of claim 4 is an anti-theft alarm device for a dam management device in which an abnormal transmission from an alarm station to a monitoring station is automatically transmitted a plurality of times.

In the present invention of claim 4 , since the transmission of the abnormality from the alarm station to the monitoring station is automatically transmitted a plurality of times, the abnormal state can be reliably transmitted and the reception can be performed reliably. , Can be communicated to the monitoring station monitor.

According to the fifth aspect of the present invention, when an abnormality is transmitted from the alarm station to the monitoring station, an alarm is automatically issued from the monitoring station to the outside if the monitoring station does not take a status check within a predetermined time. It is an anti-theft alarm device for the dam management device to send.

In the present invention of claim 5, when an abnormality is transmitted from the alarm station to the monitoring station, if the monitoring station does not take a status check within a predetermined time, the monitoring station automatically issues an alarm to the outside. Since the transmission is performed, even when the monitoring station is absent from the monitoring station, the abnormal state can be surely notified to other predetermined external personnel, and the abnormal state can be reliably treated.

The present invention of claim 6 is an anti-theft alarm device for a dam management device that detects an abnormal state of an alarm station when a person approaches or enters the alarm station.

In the present invention of claim 6 , since an abnormal state of the alarm station can be detected when a person approaches or enters the alarm station, an alarm can be issued before the alarm station device is touched. It can be warned and threatened, and is effective in preventing theft.

The present invention of claim 7 is an anti-theft alarm device for a dam management device that detects an abnormal state of an alarm station when the door of the alarm station is opened.

In the present invention of claim 7 , since the detection of the abnormal state of the alarm station is detected when the door of the alarm station is opened, a suspicious person can detect the alarm station immediately before entering the alarm station and issue an alarm. It is effective for prevention.

The present invention of claim 8 is an anti-theft alarm device for a dam management device that detects an abnormal state of an alarm station when power transmission from the outside to the alarm station is stopped.

In this invention of Claim 8 , since it detects when the power transmission from the outside to an alarm station stops, when an external power supply is interrupted | blocked and an apparatus of an alarm station is taken out, an alarm can be issued immediately. In addition, when power transmission from the outside stops, an alarm cannot be normally transmitted from the alarm station to the basin, but the abnormal state can be dealt with immediately.

The alarm station has an alarm station receiver, an alarm station display / detection device, and an alarm station transmitter, so it is possible to accurately report predetermined alarms such as dam water discharge to residents in the basin of the dam. it can. An abnormal state of the alarm station can be detected by the alarm station display / detection device and the abnormality can be notified to the surrounding area, so that theft of parts can be prevented and early recovery of malfunction can be achieved.
Since the alarm station transmitter can send an alarm of the abnormal condition of the alarm station to the monitoring station, the abnormal condition of the alarm station can be immediately known at the monitoring station away from the alarm station, and the response to the abnormal condition is immediately Can be taken.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing the configuration of a theft prevention alarm device of the dam management device 1 of the present invention. The dam management device 1 includes a monitoring station 10 and a plurality of alarm stations 20. The monitoring station 10 is usually installed near the dam site and monitors the amount of water in the dam, the upstream precipitation condition, and the like, and there are many cases where a monitoring person is always stationed or stays in the daytime. A large number of alarm stations 20 are installed upstream and downstream of the river of the dam away from the monitoring station 10, and in the upstream, it is a telemeter slave station that observes and communicates precipitation, and in the downstream, the dam is discharged. This is a discharge warning station that notifies the residents of the downstream basin and anglers.

The monitoring station 10 includes a monitoring station transmitter 11, a monitoring station receiver 12, and a monitoring station display device 13.
The monitoring station transmitter 11 wirelessly transmits a signal from the monitoring station 10 to the alarm station 20 and is connected to the monitoring station display device 13. The monitoring station receiver 12 wirelessly receives an alarm from the alarm station 20 described later, and is connected to the monitoring station display device 13.

The monitoring station display device 13 includes a lighting panel 14, a display panel 15, and a print printer 16 shown in FIG. 4.
Each of the lighting panels 14 has an LED lamp installed at a location corresponding to the indication of the loudspeaker abnormality, the solar cell abnormality, the commercial power supply interruption, the inspection, and the inspection while the door is open, and the corresponding part is not lit normally. When an abnormality occurs, the LED lamp is lit and the location of the abnormality can be displayed.

  As shown in FIG. 5, the display panel 15 is composed of a liquid crystal display screen. Is displayed. In this display, each alarm station 20 can be sequentially displayed, and the states of all the alarm stations 20 can be displayed. The alarm station 20 can be identified by a combination of a group number and a station number, each of which is a two-digit number.

As shown in FIG. 6, the printer 16 includes a date, hour, minute, second and dam name to be displayed, station number and alarm station name of the alarm station 20, door 25, loudspeaker 26, solar cell 29, commercial power source. Characters representing the presence or absence of 30 abnormalities and their contents are printed and discharged.
Also, if the monitoring station display device 13 does not check the status within a predetermined time after receiving the alarm, the alarm can be transferred to the security company or the head office department through the NTT line. Connected to the outside.

Next, the alarm station 20 will be described. As described above, there are two types of alarm stations 20, a discharge alarm slave station and a telemeter slave station.
A device that monitors the alarm station 20 that is a discharge alarm slave station includes an alarm station transmitter 21, an alarm station receiver 22, and an alarm station display / detection device 23. Further, the alarm station 20 includes a storage battery 24 that sends electricity to the alarm station 20 device, a fence that surrounds the alarm station 20, a door 25 provided at the entrance, a loudspeaker 26 that notifies the abnormality by sound, and the abnormality by light. It has a rotating lamp 27 to notify, a proximity sensor 28 to notify the suspicious person's approach to the alarm station 20, and a solar cell 29 for generating power for these devices and a commercial power source 30 to transmit power.

  In addition, when a warning is transmitted by installing a digital camera, TV camera, or the like outside the alarm station 20, the suspicious person and its situation are automatically captured and recorded in the alarm station display / detection device 23. May be performed.

The alarm station transmitter 21 sends signals such as a normal state and an abnormal state of the alarm station 20 to the monitoring station 10, and is connected to the alarm station display / detection device 23. The monitoring station receiver 12 receives signals from the monitoring station 10 and is connected to the alarm station display / detection device 23.
The alarm station display / detection device 23 detects and displays the normal state or abnormal state of the door 25, the loudspeaker 26, the rotating lamp 27, the proximity sensor 28, the solar battery 29, and the commercial power source 30, and the alarm station transmitter 21. Sends a signal to the alarm station transmitter 21 so as to transmit the normal state and the abnormal state to the monitoring station 10.

  The configuration of the alarm station 20 that is a telemeter slave station also includes a door 25, a loudspeaker 26, a rotating lamp 27, a proximity sensor 28, a solar cell 29, and a commercial power source 30, almost the same as the discharge alarm slave station. In addition, an observation device such as a rain gauge and a thermometer and a transmitter for transmitting the observation result to the monitoring station 10 are installed.

Next, the operation of the alarm station 20 will be described with reference to the drawings.
When an abnormal state occurs, the abnormal state of the door 25, the loudspeaker 26, the rotary lamp 27, the proximity sensor 28, the solar battery 29, or the commercial power supply 30 is transmitted to the monitoring station 10. This transmission can be performed in about several seconds for each alarm station 20, and each alarm station 20 transmits to the monitoring station 10 every time an abnormality occurs. The monitoring station 10 is displayed on the display panel 15 of the monitoring station display device 13 and printed by the print printer 16.

  When an abnormal state occurs, for example, when a suspicious person approaches the door 25 that is the entrance / exit of the alarm station 20, the proximity sensor 28 attached to the door 25 senses the abnormal signal to the alarm station display / detection device 23. The alarm station display / detection device 23 sends a signal to the rotary lamp 27 to light it, and also sends a signal to the loudspeaker 26 to sound an alarm buzzer sound. The loudspeaker 26 and the rotating lamp 27 can be provided with a timer so that an alarm buzzer can be automatically turned off and turned on after a predetermined time. For example, the alarm buzzer sound can be stopped in about 1 minute to 60 minutes, and the rotating lamp 27 can be stopped in about 10 minutes to 12 hours.

This is because the revolving lamp 27 and the alarm buzzer are used for caution and threatening to prevent theft. In addition to the loudspeaker 26, an alarm buzzer may be provided.
As shown in FIG. 1, the alarm station transmitter 21 wirelessly transmits an abnormal signal to the monitoring station 10 by a signal from the alarm station display / detection device 23. This abnormal signal is transmitted three times at 1 minute intervals. The reason for transmitting three times is to ensure transmission.

The monitoring station 10 receives the abnormal signal from the alarm station 20 by the monitoring station receiver 12 and sends the signal to the monitoring station display device 13. When receiving the abnormal signal, the monitoring station display device 13 first sounds an alarm buzzer. This is because the staff of the monitoring station 10 can immediately detect the abnormality. At the same time, as shown in FIG. 4, the LED lamp of the lighting panel 14 of the alarm station display / detection device 23 is turned on to notify the abnormal portion.
The monitoring station display device 13 can be provided with a reset switch, and the alarm buzzer can be stopped by pressing the reset switch after the monitoring person confirms the abnormality. Then, after the abnormal state is recovered, the LED lamp can be turned off.

Further, as shown in FIG. 5, the date and time of alarm signal input, the station number of the alarm station 20, and the abnormal item are displayed on the liquid crystal screen of the display panel 15 with predetermined numbers. This is to inform the observer of the location and content of the abnormality. Simultaneously with the display on the display panel 15, the date and time of alarm signal input, the time, and the status of the alarm station 20 are printed on the print printer 16. For this reason, it is possible to record the occurrence of an abnormal state.
The alarm buzzer, the lighting panel 14, the display panel 15, and the print printer 16 of the monitoring station display device 13 are preferably attached, but at least two of the above are required. This is to ensure that the alarm is communicated to the observer.

When a suspicious person further opens the door 25 and enters the alarm station 20, an open / close switch attached to the door 25 works to transmit an abnormal signal to the alarm station display / detection device 23. This switch is normally closed and is set to open when the door 25 is opened. When the proximity sensor 28 is not attached to the door 25, the open / close switch of the door 25 is activated first.
The monitoring station receiver 12 of the monitoring station 10 that has received the abnormal signal from the alarm station 20 sends the signal to the monitoring station display device 13 as in the case of the proximity sensor 28. The monitoring station display device 13 has an alarm buzzer. Simultaneously with the sounding, the LED lamp “lighting door open” of the lighting panel 14 is turned on to display the abnormal state on the display panel 15 and print the abnormal state on the print printer 16.

Next, an alarm device for the solar battery 29 will be described. A proximity sensor 28 and an alarm cable 40 are attached to the solar cell 29 as an alarm device. The proximity sensor 28 operates with respect to a suspicious person approaching the solar cell 29 in the same manner as that attached to the door 25.
The alarm cable 40 is a multi-core cable and includes a cut detection circuit 41 and a short circuit detection circuit 42. The disconnection detection circuit 41 is a circuit in which two electric wires in the alarm cable 40 are closed in a loop shape, and a small amount of current (for example, about 70 mA) always flows through the two electric wires. The short-circuit detection circuit 42 is a circuit in which the ends of two parallel lines are opened and not closed, and a low voltage (for example, about 12 V) is always applied to both lines, but current flows. Absent.

In this embodiment, the alarm cable 40 is constituted by a cut detection circuit 41 and a short circuit detection circuit 42 in a single multi-core cable shape, and can be easily removed after passing through the solar cell 29. Mounted as impossible.
When a suspicious person tries to take away the solar battery 29, the alarm cable 40 is cut with a nipper or the like. However, when the short-circuit detection circuit 42 of the alarm cable 40 is cut, the cutting edge of the nipper has a short-circuit detection circuit 42. Short circuit causes current to flow. At that time, as shown in FIG. 3, the switch 44 is activated and a signal flows to the alarm station display / detection device 23, and a warning continues to flow, and an abnormal signal is sent to the alarm station display / detection device 23. . The alarm station display / detection device 23 wirelessly transmits this abnormality signal from the alarm station transmitter 21 to the monitoring station 10. In this way, when the alarm cable 40 is cut with a metal tool, an abnormal signal can be transmitted immediately. After confirming the abnormal signal, the switch 44 can be disconnected to stop the alarm signal.

  For example, when the alarm cable 40 is torn and the disconnection detection circuit 41 is disconnected and no current flows, the disconnection detection circuit 41 of the alarm cable 40 operates, and the abnormal signal is output in the same manner as described above. It transmits to the alarm station display / detection device 23. This abnormal signal is wirelessly transmitted from the alarm station transmitter 21 to the monitoring station 10. Thereby, even when the alarm cable 40 is cut without short-circuiting the short-circuit detection circuit 42, an abnormal state can be detected. In this way, the LED panel of the portion corresponding to the “solar cell abnormality” is lit on the lighting panel 14 of the monitoring station display device 13 that has received the abnormality signal from the solar cell 29, similarly to the door 25. Is printed.

Next, an alarm device for the loudspeaker 26 will be described. Similar to the solar cell 29, the loudspeaker 26 is also provided with a proximity sensor 28 and an alarm cable 40 as alarm devices. The proximity sensor 28 operates on a suspicious person approaching the loudspeaker 26 similar to the one attached to the solar cell 29. Similarly, the alarm cable 40 is attached so as to pass through the loudspeaker 26. When the loudspeaker 26 is to be taken away, either or both of the disconnection detection circuit 41 and the short-circuit detection circuit 42 are activated and an alarm can be issued to the alarm station display / detection device 23. Thereafter, in the same manner as described above, the alarm station transmitter 21 transmits the alarm to the monitoring station 10, and the alarm buzzer of the monitoring station display device 13, the lighting panel 14, etc. are activated.
The circuit is provided with a buffer relay in order to avoid external influences such as lightning.

  In many cases, the alarm station 20 is supplied not only with electricity from the solar battery 29 but also from the commercial power source 30. When the electric wire that supplies the commercial power supply 30 is cut, the alarm station 20 operates abnormally, so that it is necessary to issue an alarm. For this reason, when it becomes impossible to receive power from the commercial power supply 30, that is, when no current flows through the electric wire of the commercial power supply 30, the relay 43 operates and immediately sends an abnormal signal to the alarm station display / detection device 23. And an abnormal signal is transmitted to the monitoring station 10 similarly to the solar cell 29 grade | etc.,.

An inspector may enter the alarm station 20 for inspection or the like. In this case, the inspector needs to perform a predetermined procedure to cancel the alarm device. For this reason, an inspection switch 45 is provided that allows the inspector to release the alarm device of the alarm station 20.
When the inspection and treatment of the abnormal state is completed, or the confirmation of the abnormal state is completed, the monitoring station display device 13 of the monitoring station 10 is returned to the original state, and the rotating lamp 27, loudspeaker 26 and alarm of the alarm station 20 are returned. The state of the station display / detection device 23 can be restored.

It is a schematic diagram which shows the structure of the monitoring station and alarm station of the dam management apparatus of this invention. It is a schematic diagram which shows the operating state of the monitoring station and alarm station of the dam management apparatus of this invention. It is a schematic diagram which shows the operating state of the alarm cable of this invention. It is a figure which shows the display state of the monitoring station display apparatus of this invention. It is a figure which shows the display state of the display panel of the monitoring station display apparatus of this invention. It is a figure which shows the content which the printing printer of the monitoring station display apparatus of this invention printed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Monitoring station 11 Monitoring station transmitter 12 Monitoring station receiver 13 Monitoring station display device 14 Lighting panel 15 Display panel 16 Print printer 20 Alarm station 21 Alarm station transmitter 22 Alarm station receiver 23 Alarm station display / detection device 25 Door 26 Loudspeaker 27 Rotating light 28 Proximity sensor 29 Solar cell 40 Alarm cable

Claims (8)

In the dam management device having a monitoring station that monitors the state of the dam and issues an alarm in a predetermined case, and an alarm station that receives the alarm of the monitoring station and notifies the surrounding area of the issuing of the alarm,
The alarm station includes at least an alarm station receiver that receives the alarm from the monitoring station, an alarm station display / detection device that detects and displays the status of the alarm station, and a control target from the alarm station to the monitoring station. The alarm station transmitter for transmitting the status, and each device constituting the alarm station and the alarm station display / detection device are connected by an alarm cable, and the alarm cable is connected to each alarm station. Disconnection detection circuit that connects the device and the alarm station display / detection device in a constantly energized state, and the respective devices constituting the alarm station and the alarm station display / detection device are always energized with a predetermined voltage applied. When there is an abnormality that may cause theft due to disconnection in one of the two circuits, the short circuit detection circuit connected in the state, the abnormal state of the alarm station is detected,
The alarm station display / detection device receives and displays an abnormality signal of the disconnection detection circuit or the short-circuit detection circuit, notifies the surrounding area of the abnormality, and simultaneously notifies the monitoring station from the alarm station transmitter to the alarm station. When an alarm is transmitted from the alarm station to the monitoring station, the monitoring station displays the alarm alarm on the monitoring station, lights the alarm lamp, An anti-theft alarm device for a dam management device, characterized in that at least two or more warnings for displaying on a display screen and printing alarm content on paper are performed. The anti-theft alarm device for a dam management device according to claim 1, wherein communication between the monitoring station and the alarm station is performed by wireless communication. The anti-theft alarm device for a dam management device according to claim 1 or 2, wherein a method for notifying an abnormality of the alarm station to a surrounding area of the alarm station is generation of an alarm sound and lighting of a sensor light.   The anti-theft alarm device for a dam management device according to any one of claims 1 to 3, wherein the transmission of an abnormality from the alarm station to the monitoring station is automatically transmitted a plurality of times. When an abnormality is transmitted from the alarm station to the monitoring station, a warning is automatically transmitted from the monitoring station to the outside if the monitoring station does not take a state check within a predetermined time. The antitheft alarm device for a dam management device according to any one of claims 1 to 4. The anti-theft alarm device for a dam management device according to any one of claims 1 to 5, wherein detection of an abnormal state of the alarm station is detected when a person approaches or enters the alarm station. The anti-theft alarm device for a dam management device according to any one of claims 1 to 6, wherein detection of an abnormal state of the alarm station is detected when a door of the alarm station is opened. The anti-theft alarm device for a dam management device according to any one of claims 1 to 7, wherein detection of an abnormal state of the alarm station is detected when power transmission from the outside to the alarm station is stopped.