JP4639891B2 - Release alarm system and release alarm program - Google Patents

Description

  More particularly, the present invention relates to a discharge warning system and a discharge warning program that automatically adjust the sound pressure level so that the sound pressure level always becomes a set value even when environmental conditions such as wind and rain change.

  The discharge warning system of a dam does not transmit a warning to people on the riverbed if the discharge warning sound is too low. It is important to consider the arrangement, type, and method.

  Therefore, when constructing a discharge warning system, a preliminary survey, a desktop survey, an on-site survey, and a sound test will be conducted and fully examined. The outline of these investigations and tests is described below.

  (1) In the preliminary survey, from the dam management aspect, the dam manager and the river manager should be considered for the area where the warning should be transmitted.

  (2) In the desktop survey, the location of alarm stations, sirens, and speakers will be examined while estimating the conditions of topography, people's homes, etc., and the range of sirens and speakers used.

  (3) In the field survey, the area around the candidate site for warning stations will be surveyed.

・ Investigation of relationship between alarm target area and candidate point (Is it too close to a place where noise regulations such as hospitals, residential areas, schools, etc.)
・ Investigation of shielding for the area subject to alarm ・ Investigation of ambient noise (city noise from river water, cars, etc.)
・ Investigation of the effect of weather, such as wind and rain, on the warning target area
(4) The sound delivery test is a test in which the sound pressure level is measured with a sound pressure level meter by actually blowing a siren or speaker in order to confirm the sound reach range of the alarm sound at the place where the alarm device is scheduled to be installed. .

  Based on the results of (1) to (4), the location of the alarm station and the configuration of alarm devices such as sirens and speakers are determined. After that, the operation of the discharge warning system can be started through the purchase of equipment and installation work.

  However, the sound range of a siren or speaker is reduced when blocked by mountains, hills, trees, or the like. In addition, the range of sound changes when the forest leaves and ground conditions vary greatly depending on the season. In addition, the influence of wind, rain, and snow is great. Therefore, it is actually impossible to conduct a preliminary survey, a desktop survey, a field survey, and a sound test in consideration of all environments.

  In response to this problem, in the following prior art documents, environmental information around each speaker is acquired by sensors installed around each speaker, and the environmental information is used as a parameter for alarm level adjustment. The technique to output is described. For example, a technology has been proposed in which environmental information such as noise around the alarm device and weather information is acquired from a sensor, and an alarm is output by adjusting the audio output level of the alarm using the environmental information as a parameter. In this proposal, an alarm can be issued at an appropriate sound pressure level by adjusting the sound output level according to the environmental conditions before the alarm is issued (for example, Patent Document 1).

Also, in an alarm station equipped with a siren and a speaker, an anemometer, a sunshine meter, and a noise meter are placed around the alarm station, and when it is determined that the propagation characteristics of the alarm sound have deteriorated, the siren and the speaker are driven simultaneously. Proposals have been made. In this proposal, a speaker is supplementarily added to increase the sound pressure level when it is difficult to hear an alarm sound due to the wind direction or the like (for example, Patent Document 2).
JP-A-11-66480 JP 2003-85681 A

  As mentioned above, the dam discharge warning system does not transmit the warning to the people on the riverbed if the warning sound is too low, and conversely if it is too high, it will cause a noise problem for neighboring residents. Control is important. However, the sound pressure level is difficult to control because the way it is heard changes depending on environmental conditions such as climatic conditions such as noise around the alarm device, wind speed, and rainfall.

  The proposal of Patent Document 1 acquires ambient environmental information with a sensor installed around the speaker, and adjusts the sound pressure level of the alarm using this environmental information as a parameter. It is necessary to have the same sound pressure level. It can be thought that it takes a lot of time and labor to acquire all such information prior to the construction of the system. In addition, there is a problem that consideration is not made when a change in weather occurs after the alarm is issued (for example, when it is a heavy rain after the alarm is issued). Furthermore, there is a problem that it is difficult to cope with changes in surrounding buildings or changes in terrain after the start of operation.

  The proposal of Patent Document 2 combines a siren and a speaker, detects an environmental state by a sensor, and when it is determined that the propagation characteristic is deteriorated, the sound pressure level is increased by using the speaker as an auxiliary sound. However, in this case as well, there is a problem that the case where the environmental state changes after the issue is not taken into consideration as in the case of the patent document.

  The present invention provides a discharge warning system and a discharge warning program that can automatically adjust at a certain sound pressure level to issue an alarm even when environmental conditions change after the alarm is issued.

The discharge warning system and the discharge warning program of the present invention are configured as follows.
(1) First Invention FIG. 1 shows the principle of the first invention. The discharge alarm system includes a first alarm transmission means 10, a sound pressure level acquisition means 20, a volume adjustment value acquisition means 30, a second It comprises an alarm sending means 40 and a control means 50.

  The first alarm sending means 10 sends an alarm from an alarm device provided in the alarm station in response to an alarm notification from the monitoring control station. At this time, the alarm device transmits an alarm with a predetermined volume setting value.

  The sound pressure level acquisition means 20 acquires the sound pressure level of the alarm sent from the sound pressure level meter. The sound pressure level meter is installed at a predetermined position in the alarm range of the alarm station.

  The volume adjustment value acquisition means 30 obtains a difference from the sound pressure level obtained by referring to the standard sound pressure level table, and then obtains a volume adjustment value of the alarm device from the difference obtained by referring to the volume adjustment value table. . Here, the standard sound pressure level table stores the standard sound pressure level for the sound pressure level meter, and the standard sound pressure level is an average based on the sound transmission test performed when the alarm station was installed. This is the value of the sound pressure level obtained when an alarm is sounded under typical environmental conditions. The value of the sound pressure level is a value that can sufficiently recognize the alarm sound at the place, and is determined as a standard value as a value that ensures this value even when the environmental conditions change. The volume adjustment value table is a table that stores volume adjustment amounts for differences in sound pressure levels when adjusting the volume of the alarm device. For example, the table records that the volume adjustment of the alarm device is increased by +1 when the difference in sound pressure level between the current sound pressure level and the standard sound pressure level is −2 dB (decibel).

  The second alarm sending means 40 adjusts the current volume setting value based on the obtained volume adjustment value and sends an alarm.

The control means 50 implements the sound pressure level acquisition means 20, the volume adjustment value acquisition means 30, and the second alarm sending means 40 every predetermined time. That is, the sound pressure level of the alarm sound is obtained from the sound pressure level meter every predetermined time, the volume adjustment value of the alarm device is obtained from the difference from the standard sound pressure level, and the current sound volume setting value is adjusted to generate an alarm. Control to do things.
(2) Second invention In the second invention, in the second alarm means sending means 40 of the first invention, when the current volume setting value is adjusted by the volume adjustment value obtained by the volume adjustment value acquisition means 30 In addition, when the volume setting value exceeds the maximum value of the volume setting of the alarm device, an alarm is transmitted at the maximum value of the alarm device and a request for sound pressure reinforcement is made to the adjacent alarm station. This adjacent alarm station is an adjacent alarm station close to the sound pressure level meter that has acquired the sound pressure level by the sound pressure level acquisition means 20.

When a request for sound pressure reinforcement is received from an adjacent alarm station, the current volume setting value is adjusted to a value obtained by adding a predetermined value to the volume adjustment value obtained by the volume adjustment value acquisition means 30, and an alarm is transmitted. To do.
(3) 3rd invention 3rd invention is the discharge | release warning program of the discharge | release alarm system in 1st invention.

  According to the first invention, it is possible to provide a discharge alarm system that can be automatically adjusted in real time so that a standard sound pressure level can always be obtained even if environmental conditions such as wind and rainfall change.

  According to the second invention, when a sound pressure level necessary for an alarm sound cannot be obtained at one alarm station, an alarm sound from an adjacent alarm station can be reinforced.

  According to the third aspect of the present invention, it is possible to provide a discharge alarm program for a discharge alarm system that can be automatically adjusted in real time so that a constant sound pressure level can always be obtained even when environmental conditions change.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 2 shows an example of the arrangement of monitoring control stations and alarm stations in the discharge alarm system and an example of the sound range of the alarm. The monitoring control station 100 monitors the water level of the dam, and when the water stored by the dam is discharged, the monitoring control station 100 instructs the alarm station to send an alarm and is arranged around the dam. The alarm stations 200-1 to 200-4 are arranged along the river discharged from the dam, and are arranged at intervals that overlap each alarm range. The alarm stations 200-1 to 200-4 have one siren as a main alarm device and two or three speakers as auxiliary alarm devices. A siren pseudo sound is sent from the speaker. The siren volume cannot be adjusted, but the speaker volume can be adjusted. FIG. 2 shows an area in which the entire sound range is covered with a siren sound range of 800 m and a speaker sound range of 300 m.

  The monitoring control station 100 and the alarm stations 200-1 to 4 shown in FIG. 2 are connected by wire or wirelessly, and an alarm notification is transmitted from the monitoring control station 100 to the alarm stations 200-1 to 200-4. Also, the alarm stations 200-1 to 4 can communicate between adjacent alarm stations, and if it is determined that the alarm sound of the alarm area that they are responsible for is insufficient due to environmental conditions, the alarm stations 200-1 to 4 are alerted to the adjacent alarm stations. A sound reinforcement request notification is performed by this communication. FIG. 3 shows an example of this communication.

  Next, a configuration example of the alarm station 200 will be described with reference to FIG. The alarm station 200 includes a CPU 210 that controls data and programs, a communication control unit 220 that controls wireless communication with the monitoring control station 100 and the adjacent alarm station 200, an antenna 230 for wireless communication, a siren 250, a speaker 260, a sound The input / output control unit 240 that controls the input / output devices of the pressure level meter 270, the standard sound pressure level table 280 that stores the standard sound pressure level value for each sound pressure level meter, and the volume adjustment value for the speaker for each sound pressure level meter It comprises a stored volume adjustment value table 290 and an alarm control program 300 that performs alarm control of the alarm station.

  The alarm control program 300 further includes an alarm notification receiving unit 301, a sound pressure level acquiring unit 302, a volume adjusting unit 303, an alarm sending unit 304, and an alarm reinforcement notification transmitting / receiving unit 305. An outline of each of these programs will be described.

  The alarm notification receiving unit 301 receives an alarm notification transmitted from the monitoring control station 100, and instructs an alarm transmission unit 304 described later to transmit an alarm.

  The sound pressure level acquisition unit 302 acquires sound pressure level data from the sound pressure level meter 270 via the input / output control unit 240 every predetermined time after the alarm is sent, and acquires the acquired sound pressure level data in the volume adjustment unit 303 described below. Pass data.

  The volume adjusting unit 303 obtains a difference between the sound pressure levels by referring to the standard sound pressure level table 280 based on the sound pressure level of each sound pressure level meter acquired by the sound pressure level acquiring unit 302 every predetermined time. The volume adjustment adjustment value of each speaker for each sound pressure level meter is obtained with reference to the volume adjustment adjustment value table 290. Then, the maximum value among the volume adjustment adjustment values of each speaker is determined as the volume adjustment adjustment value, and the value is passed to the alarm sending unit 304.

  When receiving an alarm transmission instruction from the alarm notification receiving unit 301, the alarm transmission unit 304 transmits the speaker 260 via the input / output control unit 240 with the siren 250 and a predetermined initial volume setting value (speaker 260). Sends siren pseudo sound). When a volume adjustment value is passed from the volume adjustment unit 303, the volume adjustment value of each speaker is adjusted with the volume adjustment value, and an alarm is transmitted. In addition, the current volume setting value of each speaker is stored.

  The alarm reinforcement notification transmission / reception unit 305 transmits an alarm reinforcement request notification to an adjacent alarm station when the volume adjustment value obtained by the volume adjustment unit 303 exceeds the maximum volume setting value of the speaker. On the other hand, when an alarm reinforcement request notification is transmitted from an adjacent alarm station, it is received here, and the alarm sending unit 304 is instructed that the notification has been received.

  Next, an arrangement example of the alarm device and the sound pressure level meter will be described with reference to FIG. FIG. 5 shows an alarm range of one alarm station 200, and is an example in which the alarm station 200 is installed around a river. This alarm station 200 includes one siren 250 and three speakers 260 (SP1 to SP3), each of which is located upstream and downstream of the river centering on the siren 250 and one speaker 260 (SP2). Speakers 260 (SP1 and SP3) are arranged. A total of five sound pressure level meters (L1 to L5) are provided around the riverbank, around the road, around the alarm device, covered with obstacles, around private houses, and around Takagi.

  Next, data examples of the standard sound pressure level table 280 and the volume adjustment value table 290 will be described.

  FIG. 6 shows an example of data in the standard sound pressure level table 280, which stores standard sound pressure levels of five sound pressure level meters. For example, the sound pressure level meter of L1 has a standard sound pressure level of 85 dB, and is adjusted so that the sound pressure becomes this value when an alarm is sent. This numerical value is set as a standard value based on the data obtained in the sound transmission test as described above, and is a value of the sound pressure level at which an audible alarm sound can be heard reliably and is not excessively loud. is there.

  FIG. 7 shows a data example of the volume adjustment value table 290. It stores the adjustment value for volume adjustment for each speaker with respect to the difference between the actual sound pressure level and the standard sound pressure level acquired by the sound pressure level meter. For example, when the sound pressure level acquired by the sound pressure level meter of L1 is 81 dB, the standard value of L1 is 85 dB with reference to the standard sound pressure level table 280 of FIG. That is, the sound pressure level difference is -4 dB). The adjustment values for the speakers in this case are “2”, “0”, and “0” for each of the speakers SP1 to SP3. The current volume is adjusted in a direction to increase the volume of “+2” with respect to SP1 (SP2 and SP3 are “0”, so the current state is maintained). Here, it is assumed that each speaker can be electrically adjusted from 0 to 10. For example, if the current volume setting value of SP1 is “1”, this is set to “3”.

  Next, the processing flow of the alarm station 200 will be described with reference to FIG. First, an alarm notification is received from the monitoring control station 100. Based on this, an alarm is sent based on a predetermined initial setting value of the alarm device. For example, the initial setting values are “Siren ON, Speaker SP1: Volume setting value 1, SP2: OFF, SP3: OFF” (S100, S110).

  Next, a sound pressure level is acquired from one sound pressure level meter (for example, L1). For obtaining the sound pressure level, for example, the sound pressure level is measured for 5 seconds, and the average value is used as the sound pressure level. The standard sound pressure level table 280 is referred to determine the standard sound pressure level of the sound pressure level meter, and the difference from the acquired sound pressure level is determined. Subsequently, the volume adjustment value table 290 is referred to, and the volume adjustment value of each speaker with respect to the obtained difference value in the volume adjustment value of the corresponding sound pressure level meter is obtained. The obtained volume adjustment value of each speaker is stored in a predetermined storage area. This process is performed for all sound pressure level meters. In the processing flow, the loop processing corresponds to this (S120 to S150).

  The maximum value among the stored volume adjustment values of the speakers is determined as the volume adjustment value. Subsequently, it is checked whether an alarm sound reinforcement request notification is received from the adjacent alarm station 200. If the notification is received, the volume adjustment value of the speaker corresponding to the adjacent alarm station is set to “1”. Add For example, in the case of a request from an upstream alarm station in FIG. 5, “1” is added to the volume adjustment value of SP1. The determination of the speaker corresponding to the adjacent alarm station may include the ID of the requested alarm station in the notification of the alarm sound reinforcement request and have a correspondence table between the adjacent alarm station ID and the speaker ID. Subsequently, the sound volume adjustment value is added to the current sound volume setting value (if the sound volume adjustment is the first time after the alarm is started, the sound volume setting value of the speaker is an initial value) (S160 to S190).

  Next, it is checked for each speaker whether the volume setting value to which the volume adjustment value has been added exceeds the maximum volume setting value of the speaker. If there is a speaker exceeding the maximum volume setting value, this speaker sends an alarm at the maximum volume setting value, and determines an adjacent alarm station corresponding to the speaker and notifies an alarm sound reinforcement request. That is, even if the volume is increased by the volume adjustment value, the loudspeaker is at the maximum value, and the volume cannot be increased any more. Therefore, the adjacent alarm station is requested to support the volume. If the sum of the volume adjustment value does not exceed the maximum volume setting value, an alarm is transmitted with the volume setting value (the current volume setting value plus the volume adjustment value). If the predetermined alarm time has not passed, the sound pressure level is acquired again from the sound pressure level meter. If the alarm time has passed, the alarm transmission is stopped (S200 to S2590).

  The above processing flow is a case where alarms are sent continuously, but when alarms are sent intermittently (for example, when a 50-second alarm is sent and stopped for 10 seconds) The alarm transmission from the alarm station should be synchronized with the stop, and the sound pressure level may be acquired while the alarm is being transmitted.

  As described above, if the sound pressure level is acquired for 5 seconds, the sound volume level of the alarm sound can be fed back at an interval of approximately 5 seconds to adjust the volume (when processing time is ignored), and the environment in real time. Can respond to changes in Further, since the sound pressure reinforcement of the alarm sound can be obtained from the adjacent alarm station, it is possible to reliably transmit the alarm.

  In this embodiment, when the volume of the speaker is maximum and the volume is still insufficient, an alarm sound reinforcement request notification is transmitted from the alarm station to the adjacent alarm station, but the alarm sound reinforcement request notification is transmitted from the alarm station to the monitoring control station. May be transmitted and an alarm sound reinforcement instruction may be issued to an alarm station adjacent to the alarm station.

  Further, when the volume is insufficient, the shortage may be compensated from other speakers in the same alarm station (assuming that a plurality of speakers are arranged in the alarm station).

  Moreover, although the siren and the speaker are used as the alarm device in the present embodiment, the alarm device may be a siren pseudo sound or audio only from the speaker.

  In addition to the above examples, the following additional notes are disclosed.

(Appendix 1)
Based on the alarm notification of the supervisory control station, a discharge alarm system that issues an alarm from an alarm device provided in each of the plurality of alarm stations,
The warning station
First alarm transmission means for transmitting an alarm from the alarm device at a predetermined volume setting value based on the alarm notification of the monitoring control station;
A sound pressure level acquisition means for acquiring a sound pressure level of the transmitted alarm from a sound pressure level meter installed at a predetermined position in the alarm area;
A difference from the acquired sound pressure level is obtained by referring to a standard sound pressure level table in which standard sound pressure levels of the sound pressure level meter are stored in advance, and the difference is referred to in a volume adjustment value table stored in advance. Volume adjustment value acquisition means for obtaining a volume adjustment value for the value of
A second alarm sending means for adjusting a current volume setting value by the obtained volume adjustment value and sending an alarm from the alarm device at the adjusted volume setting value;
A discharge alarm system comprising: control means for executing the sound pressure level acquisition means, the volume adjustment value acquisition means, and the second alarm transmission means at predetermined time intervals.

(Appendix 2)
The second alarm sending means includes:
When the current volume setting value is adjusted with the obtained volume adjustment value, if the adjusted volume setting value exceeds the maximum volume setting value of the alarm device, an alarm is transmitted with the maximum volume setting. Along with the sound pressure level meter that acquired the sound pressure level, notify the adjacent alarm station near the sound pressure level meter,
When a warning sound reinforcement request notification is received from an adjacent alarm station, the current volume setting value is adjusted with a volume adjustment value obtained by adding a predetermined value to the obtained volume adjustment value, and the alarm device is adjusted with the adjusted volume adjustment value. The discharge alarm system according to appendix 1, wherein an alarm is transmitted from

(Appendix 3)
A discharge alarm program for a discharge alarm system that issues an alarm from an alarm device provided in each of the plurality of alarm stations based on the alarm notification of the monitoring control station,
In the alarm station computer,
A first alarm sending procedure for sending an alarm from the alarm device at a predetermined volume setting value based on the alarm notification of the monitoring control station;
A sound pressure level acquisition procedure for acquiring a sound pressure level of the transmitted alarm from a sound pressure level meter installed at a predetermined position in the alarm area;
A difference from the acquired sound pressure level is obtained by referring to a standard sound pressure level table in which standard sound pressure levels of the sound pressure level meter are stored in advance, and the difference is referred to in a volume adjustment value table stored in advance. Volume adjustment value acquisition procedure for obtaining a volume adjustment value for the value of
A second alarm sending procedure for adjusting the current volume setting value with the obtained volume adjustment value, and sending an alarm from the alarm device with the adjusted volume setting value, a recording pressure level acquisition procedure, and the volume adjustment value acquisition A discharge alarm program for executing a procedure and a control procedure for executing the second alarm sending procedure at predetermined time intervals.

(Appendix 4)
The discharge alarm system according to claim 1, wherein the alarm device includes a siren and a speaker, and the volume is adjusted by the speaker.

(Appendix 5)
The second alarm sending procedure includes:
When the current volume setting value is adjusted with the obtained volume adjustment value, if the adjusted volume setting value exceeds the maximum volume setting value of the alarm device, an alarm is transmitted with the maximum volume setting. Along with the sound pressure level meter that acquired the sound pressure level, notify the adjacent alarm station near the sound pressure level meter,
When a warning sound reinforcement request notification is received from an adjacent alarm station, the current volume setting value is adjusted with a volume adjustment value obtained by adding a predetermined value to the obtained volume adjustment value, and the alarm device is adjusted with the adjusted volume adjustment value. The discharge alarm program according to appendix 3, wherein an alarm is transmitted from

It is a principle diagram of the invention. This is an example of the arrangement of the monitoring control station and each alarm station and the alarm sound range. It is an example of communication of a discharge warning system. It is a structural example of an alarm station. It is an example of arrangement | positioning of an alarm device and a sound pressure level meter. It is an example of data of a standard sound pressure level table. It is an example of data of a volume adjustment value table. It is an example of a processing flow of an alarm station.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st alarm transmission means 20 Sound pressure level acquisition means 30 Volume adjustment value acquisition means 40 2nd alarm transmission means 50 Control means 100 Monitoring control station 200 Alarm station 200-1 Alarm station 1
200-2 Alarm Station 2
200-3 Alarm Station 3
200-4 Alarm station 4
200-5 Alarm station 5
210 CPU
220 communication control unit 230 antenna 240 input / output control unit 250 siren 260 speaker 270 sound pressure level meter 280 standard sound pressure level table 290 volume adjustment value table 300 alarm control program 301 alarm notification reception unit 302 sound pressure level acquisition unit 303 volume adjustment unit 304 Alarm sending unit 305 Alarm reinforcement notification sending / receiving unit

Claims (2)

Based on the alarm notification of the supervisory control station, a discharge alarm system that issues an alarm from an alarm device provided in each of the plurality of alarm stations,
The warning station
First alarm transmission means for transmitting an alarm from the alarm device at a predetermined volume setting value based on the alarm notification of the monitoring control station;
A sound pressure level acquisition means for acquiring a sound pressure level of the transmitted alarm from a sound pressure level meter installed at a predetermined position in the alarm area;
A difference from the acquired sound pressure level is obtained by referring to a standard sound pressure level table in which standard sound pressure levels of the sound pressure level meter are stored in advance, and the difference is referred to in a volume adjustment value table stored in advance. Volume adjustment value acquisition means for obtaining a volume adjustment value for the value of
A second alarm sending means for adjusting a current volume setting value by the obtained volume adjustment value and sending an alarm from the alarm device at the adjusted volume setting value;
Control means for executing the sound pressure level acquisition means, the volume adjustment value acquisition means, and the second alarm sending means at predetermined time intervals ;
The second alarm sending means includes:
When the current volume setting value is adjusted with the obtained volume adjustment value, if the adjusted volume setting value exceeds the maximum volume setting value of the alarm device, an alarm is transmitted with the maximum volume setting. Along with the sound pressure level meter that acquired the sound pressure level, notify the adjacent alarm station near the sound pressure level meter,
When a warning sound reinforcement request notification is received from an adjacent alarm station, the current volume setting value is adjusted with a volume adjustment value obtained by adding a predetermined value to the obtained volume adjustment value, and the alarm device is adjusted with the adjusted volume adjustment value. A discharge alarm system characterized by sending an alarm from the <br/>. A discharge alarm program for a discharge alarm system that issues an alarm from an alarm device provided in each of the plurality of alarm stations based on the alarm notification of the monitoring control station,
In the alarm station computer,
A first alarm sending procedure for sending an alarm from the alarm device at a predetermined volume setting value based on the alarm notification of the monitoring control station;
A sound pressure level acquisition procedure for acquiring a sound pressure level of the transmitted alarm from a sound pressure level meter installed at a predetermined position in the alarm area;
A difference from the acquired sound pressure level is obtained by referring to a standard sound pressure level table in which standard sound pressure levels of the sound pressure level meter are stored in advance, and the difference is referred to in a volume adjustment value table stored in advance. Volume adjustment value acquisition procedure for obtaining a volume adjustment value for the value of
A second alarm sending procedure for adjusting a current volume setting value with the obtained volume adjustment value and sending an alarm from the alarm device with the adjusted volume setting value;
A control procedure for executing the sound pressure level acquisition procedure, the volume adjustment value acquisition procedure, and the second alarm sending procedure at predetermined time intervals;
The second alarm sending procedure includes:
When the current volume setting value is adjusted with the obtained volume adjustment value, if the adjusted volume setting value exceeds the maximum volume setting value of the alarm device, an alarm is transmitted with the maximum volume setting. Along with the sound pressure level meter that acquired the sound pressure level, notify the adjacent alarm station near the sound pressure level meter,
When a warning sound reinforcement request notification is received from an adjacent alarm station, the current volume setting value is adjusted with a volume adjustment value obtained by adding a predetermined value to the obtained volume adjustment value, and the alarm device is adjusted with the adjusted volume adjustment value. A discharge alarm program characterized by sending an alarm from <br/>.

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