JP2020155927A - Sound wave transmitting device, sound wave transmitting program, and sound wave transmitting method - Google Patents

Abstract

To provide a sound wave transmitting device capable of transmitting correct information and guiding a guiding object person to an appropriate direction, a sound wave transmitting program, and a sound wave transmitting method.SOLUTION: A sound wave transmitting device comprises: an identification signal generation part; a sound wave output part; a sound detection part; and a sound wave output control part. The identification signal generation part generates a prescribed identification signal. The sound wave output part outputs the prescribed identification signal by a sound wave of a preset frequency. The sound detection part detects a predetermined notification sound on the basis of the predetermined notification sound previously stored or stored by a self-learning and an external sound. The sound wave output control part changes a frequency used for the prescribed identification signal to a frequency in accordance with a prescribed speed of a mobile body when the prescribed notification sound is detected by the sound detection part.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sound wave transmitting device, a sound wave transmitting program, and a sound wave transmitting method.

Conventionally, there is a sound wave communication technology in which information terminals such as smartphones and tablet PCs communicate using high-frequency sound waves that are inaudible to humans, and sound wave identification signals are transmitted from a sound wave generator using the sound wave communication technology. , There is a technique for acquiring position information by receiving sound waves with a microphone of an information terminal (Patent Document 1). In addition, there is a technique of applying such a technique to a navigation system in the event of a disaster (Patent Document 2).

By the way, when a disaster such as a fire occurs at a facility, etc., the information such as the location of the disaster is not accurately transmitted, so that the facility user, etc. will move without knowing where to move. The situation is expected. However, the conventional technology is limited to providing guidance information according to the installation location of the sound wave transmitter, and there is a problem in realizing accurate information transmission and guidance in an appropriate direction based on such a situation. there were.

The present invention has been made in view of the above, and an object of the present invention is to provide a sound wave transmitting device, a sound wave transmitting program, and a sound wave transmitting method capable of transmitting accurate information and guiding a person to be guided in an appropriate direction. And.

In order to solve the above-mentioned problems and achieve the object, the sound wave transmitting device according to the embodiment of the present invention includes an identification signal generation unit, a sound wave output unit, a sound detection unit, and a sound wave output control unit. .. The identification signal generation unit generates a predetermined identification signal. The sound wave output unit outputs a predetermined identification signal by sound waves having a predetermined frequency. The sound detection unit detects a predetermined notification sound based on a predetermined notification sound stored in advance or learned by itself and a sound from the outside. When a predetermined notification sound is detected by the sound detection unit, the sound wave output control unit changes the frequency used in the predetermined identification signal to a frequency corresponding to the predetermined speed of the moving body.

According to the present invention, it is possible to transmit accurate information and guide the person to be guided in an appropriate direction.

FIG. 1 is a diagram showing an example of the overall configuration of the information system according to the first embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of the beacon according to the first embodiment. FIG. 3 is a diagram showing an example of the functional configuration of the beacon according to the first embodiment. FIG. 4 is a diagram illustrating notification to another beacon according to the first embodiment. FIG. 5 is a diagram illustrating a change in frequency according to the first embodiment. FIG. 6 is a diagram illustrating a change in volume according to the first embodiment. FIG. 7 is a schematic diagram showing an example of the volume and frequency of the identification signal output from the beacon according to the first embodiment. FIG. 8 is a diagram showing an example of a change from the normal mode to the notification mode when the beacon according to the first embodiment is installed in a facility or the like. FIG. 9 is a diagram showing an example of guidance in the notification mode according to the first embodiment. FIG. 10 is a diagram showing another example of guidance in the notification mode according to the first embodiment. FIG. 11 is a diagram showing an example of a notification range to another beacon according to the first embodiment. FIG. 12 is a flowchart showing an example of a processing flow executed by the beacon according to the first embodiment. FIG. 13 is a diagram showing an example of the functional configuration of the beacon according to the second embodiment. FIG. 14 is a diagram showing an example of a registered notification sound according to the second embodiment. FIG. 15 is a flowchart showing an example of the flow of the notification sound registration process according to the second embodiment. FIG. 16 is a diagram showing an example of a voice waveform and a frequency of a predetermined voice according to a modified example.

Hereinafter, embodiments of a sound wave transmitting device, a sound wave transmitting program, and a sound wave transmitting method embodiment will be described in detail with reference to the accompanying drawings.

(First Embodiment)
FIG. 1 is a diagram showing an example of the overall configuration of the information system S according to the present embodiment. As shown in FIG. 1, the information system S includes a plurality of beacons 4a to 4c, a server device 1, and a gateway device 3. The information system S is also referred to as a disaster prevention system.

The plurality of beacons 4a to 4c (hereinafter, when individual beacons 4a to 4c are not particularly distinguished, simply referred to as beacon 4) emit a predetermined identification signal as a sound wave. The sound wave output by the beacon 4 is assumed to be a high-frequency sound wave that is inaudible to humans. Beacon 4 is an example of a sound wave transmitting device in this embodiment. The number of beacons 4 in the information system S is not limited to the example shown in FIG.

The predetermined identification signal is a signal capable of transmitting notification information or alarm information (hereinafter, when simply referred to as "notification information", it shall include "alarm information"). The broadcast information is, for example, information indicating the occurrence of a fire, a disaster, an earthquake, or other emergency. The notification information may be information that can identify the specific content of the notification (fire, disaster, earthquake, or other emergency, etc.), but is simply some kind of fire, disaster, earthquake, or other emergency. It may be information indicating that such as has occurred. Further, the notification information may indicate an evacuation route, an evacuation direction, or the like. Further, the identification signal may include identification information that can identify the beacon 4 or position information indicating the position of the beacon 4.

Further, the beacon 4 is equipped with a microphone and can detect an external sound. For example, the beacon 4 detects a notification sound or an alarm sound output from the alarm device 6.

Further, the beacon 4 is connected to the gateway device 3 by wireless communication or wired communication. The method of wireless communication and wired communication is not particularly limited, but for example, in the case of wireless communication, Bluetooth (registered trademark), Wi-Fi (registered trademark), 920 MHz wireless or the like can be adopted. Further, for example, in the case of wired communication, USB (Universal Serial Bus), Ethernet (registered trademark), or the like can be adopted.

Further, the beacon 4 is connected to another beacon 4 by wireless communication.

The gateway device 3 is connected to the server device 1 via a network 2 such as the Internet. The gateway device 3 and the gateway device 3 are connected to the network 2 by, for example, a communication line such as LTE (Long Term Evolution).

The server device 1 manages the entire information system S. Further, the server device 1 is connected to the gateway device 3 by wireless communication or wired communication. Further, the server device 1 may be connected to the information terminal 5 by a communication line such as LTE.

When a fire, disaster, earthquake, or other emergency occurs, the alarm 6 has a predetermined alarm sound or a predetermined alarm sound (hereinafter, in the case of simply "notification sound", "alarm sound"". It is a device that outputs). It is assumed that the predetermined notification sound output by the notification device 6 is a sound in the human audible range. The alarm 6 may output different alarm sounds depending on the content of the notification (fire, disaster, earthquake, or other emergency), or outputs the same alarm sound regardless of the content of the notification. May be. Further, the alarm 6 may include a sensor for detecting an abnormality and output a predetermined alarm sound when the abnormality is detected. The alarm 6 is also referred to as an alarm.

The information terminal 5 is, for example, a smartphone, a tablet PC, or the like. A microphone is mounted on the information terminal 5, and a predetermined identification signal output from the beacon 4 can be received by the microphone. The information terminal 5 acquires broadcast information, position information indicating the position of the beacon 4, or the like from a predetermined identification signal output from the beacon 4. Further, the information terminal 5 may acquire the broadcast information by connecting to the server device 1 via a communication line such as LTE. Further, the information terminal 5 may acquire position information or the like indicating the current position of the information terminal 5 by communicating with the server device 1.

The information terminal 5 displays, for example, the content of a disaster or the like that has occurred, or the notification information about the evacuation route or the like on the display based on the notification information included in the predetermined identification signal received from the beacon 4, thereby guiding the user (guidance). Have the target person) grasp the notification information. The method of utilizing the broadcast information in the information terminal 5 is not limited to this.

The configuration of the information system S is not limited to the example shown in FIG. 1, and may include only a plurality of beacons 4. Further, the beacon 4 may be connected to the server device 1 by wireless communication or wired communication without going through the gateway device 3. Further, a configuration may be adopted in which the server device 1 is directly connected to the gateway device 3 by wireless communication or wired communication without going through the network 2. Further, the information system S may not include the server device 1 and may have a function of the gateway device 3 managing the beacon 4. Further, the information system S may include an information terminal 5 or a notification device 6.

FIG. 2 is a diagram showing an example of the hardware configuration of the beacon 4 according to the present embodiment. As shown in FIG. 2, the beacon 4 includes a communication interface (I / F) 41, a processor 42, a memory 43, a microphone 44, a speaker 45, and an operation unit 46.

The communication interface (I / F) 41 is an interface for connecting to the gateway device 3, the server device 1, or another beacon 4 by wireless communication or wired communication.

The processor 42 is a CPU, an integrated circuit (IC), or the like, and executes a program to control the entire beacon 4 in an integrated manner. The memory 43 is, for example, a storage device such as a ROM, a RAM, or a flash memory, and stores a program executed by the processor 42 and various information used for a combination process.

The microphone 44 collects the sound around the beacon 4 and sends the collected sound to the processor 42.

The speaker 45 transmits (outputs) a predetermined identification signal as a sound wave. The speaker 45 is an example of the sound wave output unit in this embodiment. Further, the beacon 4 may be provided with a buzzer or the like as a sound wave output unit instead of the speaker 45. The beacon 4 may be provided with a plurality of speakers 45, a buzzer, or the like.

The operation unit 46 is a button or the like that receives an operation of a user (administrator or the like). The operation unit 46 sends the received operation to the processor 42.

Next, the function of the beacon 4 will be described.

FIG. 3 is a diagram showing an example of the functional configuration of the beacon 4 according to the present embodiment. As shown in FIG. 3, the beacon 4 includes a communication unit 401, an identification signal generation unit 402, a sound detection unit 403, a sound wave output control unit 404, a reception unit 405, and a storage unit 450.

The storage unit 450 is realized by, for example, a memory 43. Further, the program executed by the beacon 4 of the present embodiment has a module configuration including each of the above-mentioned parts (communication unit, identification signal generation unit, sound detection unit, sound wave output control unit, reception unit), and is actually As the hardware of the above, the processor 42 reads a program from a storage medium such as a memory 43 and executes the program, so that each of the above parts is loaded on the main storage device, and the communication unit, the identification signal generation unit, the sound detection unit, and the sound wave output control unit , The reception unit is designed to be generated on the main memory.

The storage unit 450 includes notification sound information 451, setting information 452, and sound wave information 453. The notification sound information 451 and the setting information 452 and the sound wave information 453 may be transmitted from the server device 1 and stored in the storage unit 450, or may be registered in the storage unit 450 in advance.

The notification sound information 451 is information related to a predetermined notification sound or alarm sound. For example, the notification sound information 451 includes the frequency, amplitude (volume), notification time, and the like of a predetermined notification sound. When there are a plurality of types of predetermined notification sounds, for example, the notification sound information 451 can be associated with identification information capable of identifying the type of notification sound, frequency, amplitude (volume), notification time, and the like.

The setting information 452 is information associated with information such as transmission or stop (on / off) of sound wave output, volume of sound wave output, sound wave output start time, sound wave output stop time, frequency change value, and the like. is there. Further, as the frequency change value, a different value may be registered for each assumed speed of the moving object to be notified. Further, when there is only one type of moving object to be notified, for example, when only a pedestrian is assumed as a target, only the speed assumed as a pedestrian may be registered as the frequency change value. The details of the frequency change value will be described later.

The sound wave information 453 is information associated with information such as the frequency band, frequency, and identification ID of the sound wave used for outputting the identification signal. The identification ID is information that can identify the type of the identification signal. For example, the identification ID may be different depending on the content of the notification (fire, disaster, earthquake, or other emergency), or may be different depending on the degree of urgency or the like.

The communication unit 401 receives a notification from the other beacon 4 indicating that the other beacon 4 has detected a predetermined notification sound. When the communication unit 401 receives a notification indicating that the other beacon 4 has detected a predetermined notification sound, the communication unit 401 sends the reception of the notification to the identification signal generation unit 402 and the sound wave output control unit 404.

Further, when the sound detection unit 403 detects a predetermined notification sound, the communication unit 401 notifies the other beacon 4 that the predetermined notification sound has been detected.

FIG. 4 is a diagram illustrating notification to another beacon 4 according to the present embodiment. As shown in FIG. 4, when the beacon 4a detects a predetermined notification sound output by the notification device 6, the beacon 4a notifies another beacon 4b that the predetermined notification sound has been detected. By such a notification, even if the beacon 4b itself does not detect the predetermined notification sound output by the alarm 6, the beacon 4a indicates that the predetermined notification sound is output due to the occurrence of a disaster or the like. It becomes possible to distinguish from the notification from.

It should be noted that the beacons 4 may communicate with each other via the gateway device 3 without directly transmitting and receiving notifications.

Returning to FIG. 3, the identification signal generation unit 402 generates a predetermined identification signal. For example, when the identification signal generation unit 402 detects a predetermined notification sound by the sound detection unit 403, or when the communication unit 401 receives a notification indicating that the predetermined notification sound has been detected from another beacon 4. , The content of the identification signal may be changed. For example, the identification signal generation unit 402 may generate different identification signals depending on the content of the notification (fire, disaster, earthquake, or other emergency). The identification signal generation unit 402 sends the generated identification signal to the sound wave output control unit 404.

The sound detection unit 403 detects a predetermined notification sound based on a predetermined notification sound stored in advance or learned by itself and a sound from the outside collected by the microphone 44. In the present embodiment, the sound detection unit 403 collates the sound from the outside collected by the microphone 44 with the notification sound information 451 stored in the storage unit 450, and the sound from the outside is registered in the notification sound information 451. It is determined whether or not the sound is a predetermined notification sound. When the sound detection unit 403 determines that the sound from the outside is a predetermined notification sound registered in the notification sound information 451, the identification signal generation unit 402 and the sound wave output control determine that the predetermined notification sound has been detected. It is sent to unit 404.

The sound wave output control unit 404 controls the speaker 45, and outputs the identification signal generated by the identification signal generation unit 402 as sound waves from the speaker 45. In a normal state, the sound wave output control unit 404 outputs an identification signal from the speaker 45 with a sound wave having a frequency defined in advance in the sound wave information 453.

Further, the sound wave output control unit 404 changes the frequency used in the identification signal to a frequency corresponding to the predetermined speed of the moving body when the sound detection unit 403 detects a predetermined notification sound.

It is assumed that the moving body is, for example, a person and holds the information terminal 5. Further, when it is assumed that a person is on a vehicle, the vehicle may be a moving body and the speed may be set as a predetermined speed.

The sound wave output control unit 404 changes the frequency by, for example, multiplying the frequency by a coefficient in the range of 0.95 to 1.05 (setting the sound reproduction frequency in the range of 95 to 105%), and after the change. A predetermined identification signal is output to the speaker 45 by a sound wave having a frequency. The coefficient used for changing the frequency is a change value of the frequency registered in the setting information 452. By changing the frequency setting of the sound wave output control unit 404, it is possible to acquire the identification signal even if the beacon 4 moves quickly in the direction of approaching or moving away from the beacon 4. Further, when the sound wave output control unit 404 changes the frequency setting, when the moving body (person or the like) moves in either the direction toward the beacon 4 or the direction away from the beacon 4, the information moves together with the moving body. The terminal 5 can be controlled so as to easily acquire the identification signal.

Further, the sound wave output control unit 404 changes the output volume setting of the identification signal to a volume equal to or higher than a predetermined volume when a predetermined notification sound is detected by the sound detection unit 403. Specifically, the sound wave output control unit 404 changes the volume of the sound wave registered in the setting information 452 to increase the volume when a predetermined notification sound is detected by the sound detection unit 403. When the sound wave output control unit 404 changes the setting of the output volume of the identification signal to a volume equal to or higher than a predetermined volume, the volume of the sound wave of the identification signal output from the speaker 45 becomes equal to or higher than the predetermined volume. Become.

Further, the sound wave output control unit 404 receives not only when a predetermined notification sound is detected by the sound detection unit 403 but also a notification indicating that the communication unit 401 has detected a predetermined notification sound from the other beacon 4. In this case as well, the frequency used for the identification signal and the output volume setting of the identification signal are changed in the same manner as when the sound detection unit 403 detects a predetermined notification sound.

In the present embodiment, the state in which the frequency used for the identification signal and the output volume setting of the identification signal are changed by the sound wave output control unit 404 is referred to as "notification mode". Further, a state other than the "notification mode", that is, a state in which the identification signal is output with the frequency and volume registered in advance in the setting information 452 or the sound wave information 453 is referred to as the "normal mode".

The reception unit 405 receives the user's operation input from the operation unit 46. The beacon 4 may accept user operations such as setting changes from an external device (for example, server device 1) via the communication interface 41.

Next, the frequency change will be described with reference to FIG. FIG. 5 is a diagram illustrating a change in frequency according to the present embodiment. FIG. 5A shows the volume and frequency of the identification signal in the normal mode. Here, in FIG. 5, the identification signal in the normal mode is referred to as an identification signal ID1, and the sound wave that outputs the identification signal ID1 is referred to as a sound wave ID1.

In the normal mode, the range in which the information terminal 5 can acquire the sound wave ID 1 is as shown in FIG. 5A, and the same applies when the information terminal 5 moves in either the direction toward the beacon 4 or the direction away from the beacon 4. It is assumed that the sound wave ID1 can be acquired.

Further, FIGS. 5B to 5D show a change in the setting of the identification signal when the beacon 4 shifts to the notification mode by the sound wave output control unit 404. Here, in FIG. 5, the identification signal in the notification mode is referred to as an identification signal ID2, and the sound wave that outputs the identification signal ID2 is referred to as a sound wave ID2.

The frequency of a sound wave changes depending on the moving speed due to the Doppler effect, and the frequency increases as it moves closer to the sound source, and decreases as it moves away from the sound source. Therefore, it may be difficult to acquire the identification signal due to the change in frequency due to the movement of the information terminal 5.

In the example shown in FIG. 5B, the sound wave output control unit 404 sets the frequency of the sound wave low and outputs the sound wave. In this case, when the information terminal 5 moves in the direction approaching the beacon 4, the frequency to be acquired becomes high, so that the frequency becomes close to the original frequency and it becomes easy to acquire the identification signal. By this frequency change, the moving speed range that can be acquired in the approaching direction becomes a wider range than in the normal case.

Further, in the example shown in FIG. 5C, the frequency of the sound wave is set high and output. In this case, when the information terminal 5 moves away from the beacon 4, the frequency to be acquired becomes low, so that the frequency becomes close to the original frequency and it becomes easy to acquire the identification signal. Due to such a frequency change, the moving speed range that can be acquired in the direction of moving away becomes wider than that in the normal case.

Further, in the example shown in FIG. 5D, a sound wave frequency set low and a sound wave frequency set high are combined. In the example shown in FIG. 5D, it is assumed that the beacon 4 includes two speakers 45. At this time, the identification signal is acquired in the approaching direction (direction A in FIG. 5D) for the sound wave having the lower frequency and in the direction away (direction B in FIG. 5D) for the sound wave having the higher frequency. Therefore, it becomes easy for the person holding the information terminal 5 to acquire the identification signal when passing near the beacon 4 in one direction.

The sound wave output control unit 404 shall change the frequency according to the direction in which the person or object holding the information terminal 5 is to be alerted or guided. The direction to be alerted or guided may be set in the storage unit 450 in advance, or may be different depending on the type of disaster or the like that has occurred, the place where the disaster or the like has occurred, or the like. For example, the sound wave output control unit 404 holds the information terminal 5 by changing the frequency according to the direction in which it wants to call attention or guide (for example, in the direction where it is dangerous to approach or the direction of the evacuation route). It can be controlled so that the identification signal can be easily acquired when the person is moving in an appropriate direction.

Even in the normal mode, it may be set so that it can be easily acquired in either the direction toward the beacon 4 or the direction away from the beacon 4. Further, in the normal mode or the notification mode, different identification signals may be output depending on the direction toward the beacon 4 and the direction away from the beacon 4.

Next, the change in volume will be described with reference to FIG. FIG. 6 is a diagram illustrating a change in volume according to the present embodiment. FIG. 6A shows an example of a sound wave ID acquisition range 900a in which the information terminal 5 can acquire (receive) the identification signal output at the volume in the normal mode.

Further, FIG. 6B shows an example of the sound wave ID acquisition range 900b in which the information terminal 5 can acquire (receive) the identification signal output at the volume in the notification mode. As shown in FIGS. 6A and 6B, the increase in the output volume of the identification signal enables the information terminal 5 to acquire the identification signal in a wider range than in the normal mode.

FIG. 7 is a schematic diagram showing an example of the volume and frequency of the identification signal output from the beacon 4 according to the present embodiment. In FIG. 7, the narrower the line spacing, the higher the frequency, and the wider the entire line width, the louder the volume. In the example shown in FIG. 7, the frequencies increase in the order of B <A <C, and the volume is a <b. That is, as shown in FIG. 7, the volume b in the notification mode is larger than the volume a in the normal mode. Further, in the example shown in FIG. 7, the frequency is A in the normal mode, and in the notification mode, the frequency of the sound wave output toward one of the beacons 4 (right side of FIG. 7) is C, and the other (FIG. 7). The frequency of the sound wave output toward (left side of 7) is B.

The volume or frequency setting is not limited to the example shown in FIG. 7. For example, in the notification mode, the frequency B = C may be set, or the volume b = a may be set. Is also good.

FIG. 8 is a diagram showing an example of a change from the normal mode to the notification mode when the beacon 4 according to the present embodiment is installed in a facility or the like. In FIG. 8, it is assumed that beacons 4a to 4c and alarms 6a to 6c are installed on the ceiling of the passage of the facility or the like.

FIG. 8A shows a state of the normal mode. In FIG. 8A, it is assumed that none of the notification devices 6 outputs a notification sound.

Here, FIGS. 8 (b) and 8 (c) show the state of the notification mode. In FIGS. 8 (b) and 8 (c), the alarm 6c outputs a predetermined notification sound. For example, when the beacon 4c detects the notification sound output from the alarm 6c, the beacon 4c notifies the other beacons 4a and 4b that the notification sound has been detected, as shown in FIG. 8B. .. Further, as shown in FIG. 8C, the beacon 4c may notify the other beacons 4a and 4b that the notification sound has been detected via the gateway device 3.

Further, FIG. 9 is a diagram showing an example of guidance in the notification mode according to the present embodiment. In the example shown in FIG. 9, the sound wave output control unit 404 of each of the beacons 4a to 4c recognizes that the place near the beacon 4c where the notification sound is detected is dangerous, and prevents the guidance target person from approaching that direction. For the purpose of this, the frequency and volume settings are changed so that the information terminal 5 held by the guidance target person can easily acquire the identification signal when approaching the beacon 4c.

Further, FIG. 10 is a diagram showing another example of guidance in the notification mode according to the present embodiment. In the example shown in FIG. 10, in addition to the example shown in FIG. 9, the beacons 4d and 4e installed at a location slightly away from the beacon 4c that detected the notification sound are identified not in the direction approaching the beacon 4c but in the direction away from the beacon 4c. The frequency and volume settings have been changed to make it easier to acquire signals. Therefore, in the example shown in FIG. 10, the person to be guided is guided to a safe place. In this case, the beacons 4a to 4c and the beacons 4d and 4e may have different identification signal contents.

Further, FIG. 11 is a diagram showing an example of a notification range to another beacon 4 according to the present embodiment. As shown in FIG. 11, when the sound detection unit 403 detects a predetermined notification sound, the communication unit 401 of the beacon 4 notifies the other beacon 4 that the predetermined notification sound has been detected. In the present embodiment, the communication unit 401 targets other beacons 4 included in the predetermined communication range 800 for notification. In the example shown in FIG. 11, when the beacon 4a detects a predetermined notification sound output from the alarm 6, the beacon 4a indicates that the predetermined notification sound has been detected by the beacon 4b included in the predetermined communication range 800. , 4c is notified. Further, since the beacons 4x and 4y are outside the predetermined communication range 800, the beacon 4a does not notify the beacons 4x and 4y.

The predetermined communication range 800 is stored in, for example, the setting information 452 of the storage unit 450. Further, the communication range 800 may be set by an operation input from the operation unit 46, an instruction transmitted from the server device 1, or the like.

Next, the flow of processing executed by the beacon 4 configured as described above will be described. FIG. 12 is a flowchart showing an example of the flow of processing executed by the beacon 4 according to the present embodiment. At the time of executing the process of this flowchart, it is assumed that the beacon 4 is in the normal mode.

First, the identification signal generation unit 402 generates a predetermined identification signal (S1). In the normal mode, the notification information transmitted by the identification signal may be, for example, identification information that can identify the beacon 4, position information indicating the position of the beacon 4, information indicating that no disaster or the like has occurred at present, or the like. good. The identification signal generation unit 402 sends the generated identification signal to the sound wave output control unit 404.

Next, the sound wave output control unit 404 controls the speaker 45, and outputs (transmits) the identification signal generated by the identification signal generation unit 402 as sound waves from the speaker 45 (S2). In the normal mode, the sound wave output control unit 404 outputs an identification signal from the speaker 45 with a sound wave having a frequency defined in advance in the sound wave information 453.

Next, the communication unit 401 determines whether or not a notification indicating that the other beacon 4 has detected a predetermined notification sound has been received from the other beacon 4 (S3). When the communication unit 401 determines that the notification indicating that the other beacon 4 has detected the predetermined notification sound has been received from the other beacon 4 (S3 “Yes”), the communication unit 401 proceeds to the process of S6. Further, when the communication unit 401 determines from the other beacon 4 that the notification indicating that the other beacon 4 has detected the predetermined notification sound has not been received (S3 “No”), the processing of S4 is performed. move on.

Next, the sound detection unit 403 collates the sound from the outside collected by the microphone 44 with the notification sound information 451 stored in the storage unit 450, and determines whether or not a predetermined notification sound has been detected ( S4). When the sound detection unit 403 determines that the predetermined notification sound has not been detected (S4 “No”), the process returns to the process of S1. Further, when the sound detection unit 403 determines that a predetermined notification sound has been detected (S4 “Yes”), the process proceeds to the process of S5.

Next, the communication unit 401 notifies the other beacon 4 of the detection of the notification sound (S5).

Then, the sound wave output control unit 404 shifts the mode of the beacon 4 to the notification mode (S6). In the notification mode, the sound wave output control unit 404 first changes the frequency setting of the identification signal to a frequency corresponding to the speed of the guidance target person (an example of a moving body) (S7). Further, the sound wave output control unit 404 changes the setting of the volume of the identification signal (S8). The frequency and volume may be different depending on the installation location of the beacon 4, the guidance direction, the content of occurrence of a disaster, or the like.

Then, the identification signal generation unit 402 generates a predetermined identification signal (S9). In the notification mode, the identification signal generation unit 402 may generate an identification signal for transmitting notification information different from that in the normal mode. The identification signal generation unit 402 sends the generated identification signal to the sound wave output control unit 404.

Then, the sound wave output control unit 404 controls the speaker 45, and outputs (transmits) the identification signal generated by the identification signal generation unit 402 as sound waves from the speaker 45 (S10). At this time, the sound wave output control unit 404 shall output the identification signal at the changed frequency or volume. At this point, the processing of this flowchart ends.

As described above, the beacon 4 of the present embodiment detects a predetermined notification sound based on a predetermined notification sound stored in advance or learned and stored by itself and a sound from the outside, and detects the predetermined notification sound. When is detected, the frequency used in the predetermined identification signal is changed to the frequency corresponding to the predetermined speed of the moving body. Therefore, according to the beacon 4 of the present embodiment, it is possible to provide a sound wave transmitting device capable of transmitting accurate information and guiding the person to be guided in an appropriate direction.

Further, the beacon 4 of the present embodiment changes the frequency by multiplying the frequency by a coefficient in the range of 0.95 to 1.05, and outputs a predetermined identification signal from the speaker 45 with the sound wave of the changed frequency. To do. Therefore, according to the beacon 4 of the present embodiment, it is possible to effectively call attention or guide the guidance target person holding the information terminal 5.

Further, in the beacon 4 of the present embodiment, when a notification indicating that the other beacon 4 has detected a predetermined notification sound is received from the other beacon 4, the frequency used in the identification signal is determined by the moving body. Change the frequency according to the speed of. Therefore, according to the beacon 4 of the present embodiment, even when a predetermined notification sound cannot be directly detected, accurate information is transmitted and appropriate based on the notification from the other beacon 4. It is possible to provide a sound wave transmitting device capable of guiding a person to be guided in any direction.

Further, when the beacon 4 of the present embodiment detects a predetermined notification sound, it notifies another beacon 4 that the predetermined notification sound has been detected. Therefore, according to the beacon 4 of the present embodiment, the other beacons 4 in the vicinity can be shifted to the notification mode, and efficient guidance can be performed for the guidance target person.

Further, the notification target when the predetermined notification sound of the beacon 4 of the present embodiment is detected is another beacon 4 included in the predetermined communication range 800. Therefore, according to the beacon 4 of the present embodiment, for example, the notification is sent only to other beacons 4 in an arbitrary range set such as a predetermined floor, floor, or room, so that appropriate guidance is given to the person to be guided. Can be carried out.

Further, the beacon 4 of the present embodiment changes the setting of the output volume of the predetermined identification signal to a volume equal to or higher than a predetermined volume when a predetermined notification sound is detected. Therefore, according to the beacon 4 of the present embodiment, not only by changing the frequency but also by expanding the receivable range of the predetermined identification signal by increasing the volume, the guidance target person holding the information terminal 5 is subjected to. Information can be transmitted or guided more effectively.

In the present embodiment, the beacon 4 has a function of notifying another beacon 4 that a predetermined notification sound has been detected when a predetermined notification sound is detected, and a predetermined notification sound from the other beacon 4. It is assumed that it has a function of receiving a notification that a beacon has been detected, but this function is not essential.

In the present embodiment, when a predetermined notification sound is detected, or when a notification indicating that the other beacon 4 has detected the predetermined notification sound is received from the other beacon 4, the identification signal is used. Although it is assumed that the frequency used and the output volume setting of the identification signal are changed, only one of the frequency and the output volume may be changed.

The beacon 4 may detect a sound other than the notification sound output from the notification device 6 as a predetermined notification sound. For example, the notification sound is not limited to an alarm or the like, but may be an operation sound of some device, a sound notifying the end of operation of the device, or a sound notifying that the device has detected an abnormality.

In the present embodiment, the communication unit 401, which is a functional unit realized by the processor 42, is described as an example of the communication unit within the scope of claims, but the communication interface 41 may be used as an example of the communication unit.

(Second Embodiment)
In the first embodiment described above, the beacon 4 has detected a predetermined notification sound. In this second embodiment, any sound can be registered as a notification sound.

FIG. 13 is a diagram showing an example of the functional configuration of the beacon 4 according to the present embodiment. The beacon 4 of the present embodiment includes a registration unit 406 in addition to the functions of the first embodiment.

The registration unit 406 registers (adds) the sound acquired by the microphone 44 to the notification sound information 451 of the storage unit 450. For example, when registering a sound other than the emergency broadcast sound of equipment specified by law as a predetermined notification sound, the registration unit 406 extracts the characteristics of the frequency and volume of the sound to be registered over time. By doing so, the notification sound is registered. The mode in which the registration unit 406 executes such a registration process is referred to as a "notification sound registration mode".

FIG. 14 is a diagram showing an example of a registered notification sound according to the present embodiment. The example of the notification sound shown in FIG. 14A is characterized in that sounds of two types of frequencies are alternately and repeatedly sounded for a certain period of time, and the volume during the sounding is increased or decreased at a constant rate. Further, in the example of the notification sound shown in FIG. 14B, the frequency increases with time, and the volume is constant while the sound is sounding, and the sounding time and the silent time are at a constant ratio. It has the characteristic of being repeated 3 times. The registration unit 406 registers information related to features such as the value, volume, and time of each frequency in the sound to be registered in the notification sound information 451 of the storage unit 450.

Further, the registration unit 406 is not limited to the above-described method, and may use a known learning method to learn the notification sound.

Further, the sound detection unit 403 of the present embodiment has the function of the first embodiment, and detects the registered sound based on the registered sound registered by the registration unit 406 and the sound from the outside. When the sound detection unit 403 detects the notification sound registered by the registration unit 406, the identification signal generation unit indicates that a predetermined notification sound has been detected in the same manner as when the notification sound registered in advance is detected. It is sent to 402 and the sound wave output control unit 404.

Next, the flow of the notification sound registration process according to the present embodiment will be described. FIG. 15 is a flowchart showing an example of the flow of the notification sound registration process according to the present embodiment.

First, the reception unit 405 receives a change operation to the notification sound registration mode by a user (administrator or the like) input from the operation unit 46 (S21). The reception unit 405 notifies the registration unit 406 that the change operation has been accepted. Further, in this case, the user outputs (reproduces) the registration target sound around the beacon 4. The registration target sound is acquired (collected) by the microphone 44 of the beacon 4.

The registration unit 406 extracts features such as the frequency value, volume, and time of the sound to be registered acquired by the microphone 44. The registration unit 406 continues the extraction process until it determines that the feature extraction is completed (S22 “No”). Then, when the registration unit 406 determines that the feature extraction is completed (S22 “Yes”), the registration target sound is registered as a notification sound (S23). At this point, the processing of this flowchart ends.

As described above, the beacon 4 of the present embodiment registers the acquired sound in the storage unit 450, and detects the registered sound based on the registered registered sound and the sound from the outside. Therefore, according to the beacon 4 of the present embodiment, a sound other than the emergency broadcast sound of the equipment specified by law or the like can be used as a predetermined notification sound.

(Modification example)
In addition, in the above-mentioned first embodiment and the second embodiment, a predetermined notification sound is targeted for detection, but "voice" may be targeted for detection instead of sound.

For example, the sound detection unit 403 may detect a predetermined voice based on a predetermined voice stored in advance or learned and stored by itself and a voice from the outside collected by the microphone 44.

Further, the sound wave output control unit 404 may change the frequency used in the predetermined identification signal to a frequency corresponding to the predetermined speed of the moving body when the sound detection unit 403 detects a predetermined voice. .. Further, the sound wave output control unit 404 may change the output volume setting of the predetermined identification signal to a volume equal to or higher than a predetermined volume when the sound detection unit 403 detects a predetermined voice. ..

FIG. 16 is a diagram showing an example of a voice waveform and frequency of a predetermined voice according to this modification. FIG. 16 shows the amplitude and frequency of the sound when the pronunciation “Kajidesu” is pronounced. Each sound A to D corresponds to the words "ka", "ji", "de", and "su", respectively. The sound detection unit 403 of this modified example recognizes a word by detecting a break of each word and performing frequency analysis or the like of each sound. Such words such as "kajidesu" are registered in advance in the notification sound information 451 of the storage unit 450, and when the sound detection unit 403 detects the words, it is possible to shift to the notification mode.

Further, any voice may be registered in the same manner as the method of registering the notification sound described in the second embodiment.

As described above, in the beacon 4 of the present modification, the predetermined voice is detected based on the predetermined voice stored in advance or learned and stored by oneself and the voice from the outside collected by the microphone 44. When a predetermined voice is detected, the frequency used in the predetermined identification signal is changed to a frequency corresponding to the predetermined speed of the moving body. Therefore, according to the beacon 4 of the present modification, it is possible to shift to the notification mode not only by the notification sound but also by the voice.

For example, by registering the voice of the in-house broadcast broadcast in the event of a disaster or the like in the beacon 4 in advance, the beacon 4 shifts to the notification mode when the in-house broadcast is detected, and is accurate to the guidance target person. It is possible to provide a sound wave transmitting device capable of transmitting information and guiding a person to be guided in an appropriate direction.

The program executed by the beacon 4 of each of the above-described embodiments is a file in an installable format or an executable format, such as a CD-ROM, a flexible disk (FD), a CD-R, or a DVD (Digital Versaille Disk). It is recorded and provided on a computer-readable recording medium.

Further, the program executed by the beacon 4 of each of the above-described embodiments may be stored on a computer connected to a network such as the Internet and provided by downloading via the network. Further, the program executed by the beacon 4 of each of the above-described embodiments may be configured to be provided or distributed via a network such as the Internet. Further, the program executed by the beacon 4 of each of the above-described embodiments may be configured to be provided by incorporating it in a ROM or the like in advance.

Each function of the embodiment described above can be realized by one or more processing circuits. Here, the "processing circuit" in the present specification is a processor programmed to execute each function by software such as a processor implemented by an electronic circuit, or a processor designed to execute each function described above. It includes devices such as an ASIC (Application Specific Integrated Circuit), a DSP (digital signal processor), an FPGA (field programmable gate array), and a conventional circuit module.

1 Server device 2 Network 3 Gateway device 4, 4a to 4e, 4x, 4y Beacon 5 Information terminal 6, 6a to 6c Alarm 41 Communication interface 42 Processor 43 Memory 44 Microphone 45 Speaker 46 Operation unit 401 Communication unit 402 Identification signal generator 403 Sound detection unit 404 Sound output control unit 405 Reception unit 406 Registration unit 450 Storage unit 451 Notification sound information 452 Setting information 453 Sound information S information system

JP-A-2018-124954 JP-A-2016-1330899

Claims (11)

An identification signal generator that generates a predetermined identification signal,
A sound wave output unit that outputs the predetermined identification signal by sound waves of a predetermined frequency, and
A sound detection unit that detects the predetermined notification sound based on a predetermined notification sound that is stored in advance or learned and stored by itself and a sound from the outside.
A sound wave output control unit that changes the frequency used in the predetermined identification signal to a frequency corresponding to a predetermined speed of the moving body when the predetermined notification sound is detected by the sound detection unit.
A sound wave transmitting device characterized by being equipped with. The sound wave output control unit changes the frequency by multiplying the frequency by a coefficient in the range of 0.95 to 1.05, and outputs the predetermined identification signal with the sound wave of the changed frequency. The feature is to output to the unit,
The sound wave transmitting device according to claim 1. A communication unit that receives a notification from the other sound wave transmitting device indicating that the other sound wave transmitting device has detected the predetermined notification sound is further provided.
When the notification is received, the sound wave output control unit changes the frequency used in the predetermined identification signal to a frequency corresponding to a predetermined speed of the moving body.
The sound wave transmitting device according to claim 1 or 2. When the sound detection unit detects the predetermined notification sound, the communication unit notifies another sound wave transmitting device that the predetermined notification sound has been detected.
The sound wave transmitting device according to claim 3. The other sound wave transmitting device is another sound wave transmitting device included in a predetermined communication range.
The sound wave transmitting device according to claim 4. When the sound detection unit detects the predetermined notification sound, the sound wave output control unit changes the output volume setting of the predetermined identification signal to a volume equal to or higher than a predetermined volume.
The sound wave transmitting device according to any one of claims 1 to 5. It also has a registration unit that registers the acquired sound in the storage unit.
The sound detection unit detects the registered sound based on the registered sound registered by the registration unit and the sound from the outside.
The sound wave transmitting device according to any one of claims 1 to 6. The registration unit learns the characteristics of changes in the frequency and volume of the acquired sound over time, and registers the learned result in the storage unit as the registered sound.
The sound wave transmitting device according to claim 7. The sound detection unit further detects the predetermined voice based on the predetermined voice stored in advance or learned and stored by itself and the sound from the outside.
When the sound detection unit detects the predetermined voice, the sound wave output control unit changes the frequency used in the predetermined identification signal to a frequency corresponding to a predetermined speed of the moving body.
The sound wave transmitting device according to any one of claims 1 to 8. An identification signal generation step that generates a predetermined identification signal, and
A sound wave output step of outputting the predetermined identification signal to the sound wave output unit by a sound wave having a predetermined frequency, and
A sound detection step for detecting the predetermined notification sound based on a predetermined notification sound stored in advance or learned by oneself and a sound from the outside, and a sound detection step.
A sound wave output control step of changing the frequency used in the predetermined identification signal to a frequency corresponding to a predetermined speed of the moving body when the predetermined notification sound is detected.
A sound wave transmission program to make a computer execute. An identification signal generation step that generates a predetermined identification signal, and
A sound wave output step of outputting the predetermined identification signal to the sound wave output unit by a sound wave having a predetermined frequency, and
A sound detection step for detecting the predetermined notification sound based on a predetermined notification sound stored in advance or learned by oneself and a sound from the outside, and a sound detection step.
A sound wave output control step of changing the frequency used in the predetermined identification signal to a frequency corresponding to a predetermined speed of the moving body when the predetermined notification sound is detected.
Sound wave transmission method including.