WO2020240724A1 - 光ファイバセンシングシステム、光ファイバセンシング機器及び音出力方法 - Google Patents

光ファイバセンシングシステム、光ファイバセンシング機器及び音出力方法 Download PDF

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Publication number
WO2020240724A1
WO2020240724A1 PCT/JP2019/021210 JP2019021210W WO2020240724A1 WO 2020240724 A1 WO2020240724 A1 WO 2020240724A1 JP 2019021210 W JP2019021210 W JP 2019021210W WO 2020240724 A1 WO2020240724 A1 WO 2020240724A1
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Prior art keywords
sound
optical fiber
output
unit
acoustic data
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PCT/JP2019/021210
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English (en)
French (fr)
Japanese (ja)
Inventor
小島　崇
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NEC Corp
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NEC Corp
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Priority to JP2021521645A priority Critical patent/JP7540821B2/ja
Priority to US17/612,631 priority patent/US20220225033A1/en
Priority to PCT/JP2019/021210 priority patent/WO2020240724A1/ja
Publication of WO2020240724A1 publication Critical patent/WO2020240724A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants

Definitions

  • the present disclosure relates to an optical fiber sensing system, an optical fiber sensing device, and a sound output method.
  • Patent Document 1 discloses a technique for detecting sound by analyzing a phase change of a light wave transmitted through an optical fiber.
  • an acoustic system that outputs sounds such as the voice of a person
  • an acoustic system that uses a microphone hereinafter, simply referred to as a "microphone” and outputs the sound collected by the microphone is generally known.
  • microphones require settings such as placement and connection according to the sound system that uses the microphone and the usage scene.
  • the sound system is a conference system
  • microphones multiple microphones in some cases
  • the positions of the microphones are changed or connected to the microphones according to the number of participants in the conference and the arrangement of seats. It is necessary to organize the electric cables. Therefore, the setting of the sound system using the microphone is complicated, and it is difficult to flexibly construct the sound system.
  • the optical fiber can detect sound as described above, it has a function corresponding to the sound collecting function of the microphone.
  • the technique described in Patent Document 1 is limited to detecting sound from light waves transmitted through an optical fiber, and there is no concept of outputting the detected sound itself.
  • an object of the present disclosure is to provide an optical fiber sensing system, an optical fiber sensing device, and a sound output method capable of solving the above-mentioned problems and flexibly constructing an audio system.
  • the optical fiber sensing system is An optical fiber that transmits an optical signal on which sound is superimposed, A conversion unit that converts the optical signal into acoustic data, An output unit that outputs the sound based on the acoustic data, To be equipped.
  • the sound output method is A transmission step in which an optical fiber transmits an optical signal on which sound is superimposed, A conversion step for converting the optical signal into acoustic data, An output step that outputs the sound based on the acoustic data, including.
  • an optical fiber sensing system an optical fiber sensing device, and a sound output method capable of flexibly constructing an audio system.
  • FIG. 1 It is a figure which shows the configuration example of the optical fiber sensing system which concerns on Embodiment 1.
  • FIG. It is a flow chart which shows the operation example of the optical fiber sensing system which concerns on Embodiment 1.
  • FIG. It is a figure which shows the structural example of the modification of the optical fiber sensing system which concerns on Embodiment 1.
  • FIG. It is a figure which shows the configuration example of the optical fiber sensing system which concerns on Embodiment 2.
  • FIG. 1 shows the configuration example of the optical fiber sensing system which concerns on Embodiment 1.
  • FIG. It is a flow chart which shows the operation example of the optical fiber sensing system which concerns on Embodiment 1.
  • FIG. It is a figure which shows the structural example
  • FIG. It is a figure which shows another example of notifying the sound generation position in the optical fiber sensing system which concerns on Embodiment 2.
  • FIG. It is a flow chart which shows the operation example of the optical fiber sensing system which concerns on Embodiment 2. It is a figure which shows the example of notifying the sound generation position and the type of a sound source in the optical fiber sensing system which concerns on Embodiment 3. It is a flow chart which shows the operation example of the optical fiber sensing system which concerns on Embodiment 3. It is a figure which shows the configuration example of the optical fiber sensing system which concerns on Embodiment 4. It is a figure which shows the example of notifying the sound generation position and the type of a sound source in the optical fiber sensing system which concerns on Embodiment 4.
  • FIG. 1 shows still another example of the optical fiber laying method in the conference system which concerns on application example 2. It is a figure which shows still another example of the optical fiber laying method in the conference system which concerns on application example 2. It is a figure which shows still another example of the optical fiber laying method in the conference system which concerns on application example 2. It is a figure which shows the example of the connection method of the optical fiber in the conference system which concerns on application example 2. It is a figure which shows the example of the arrangement in the meeting room of the base X in the meeting system which concerns on application example 2. FIG. It is a figure which shows the display example 1 which displays and outputs the sound generation position and the type of a sound source in the conference system which concerns on application example 2. It is a figure which shows the example of the correspondence table used in the display example 1 in application example 2. FIG.
  • FIG. It is a figure which shows the example of the method of acquiring the name of the conference participant sitting in the chair in the display example 1 in the application example 2.
  • FIG. It is a figure which shows the display example 2 which displays and outputs the sound generation position and the type of a sound source in the conference system which concerns on application example 2.
  • the display example 3 which displays and outputs the sound generation position and the type of a sound source in the conference system which concerns on application example 2.
  • It is a block diagram which shows the example of the hardware composition of the computer which realizes the optical fiber sensing apparatus which concerns on embodiment.
  • the optical fiber sensing system includes an optical fiber 10 and an optical fiber sensing device 20. Further, the optical fiber sensing device 20 includes a conversion unit 21 and an output unit 22.
  • the optical fiber 10 is laid in a predetermined area.
  • the optical fiber 10 is laid in a predetermined area in the conference room.
  • a predetermined area in the conference room is, for example, a table, a floor, a wall, a ceiling, or the like in the conference room.
  • the optical fiber sensing system is applied to a monitoring system, it is laid in a predetermined monitoring area to be monitored.
  • the predetermined monitoring area is, for example, a border, a prison, a commercial facility, an airport, a hospital, a city, a harbor, a plant, a nursing facility, a company building, a nursery school, a home, or the like.
  • the optical fiber 10 may be laid in a predetermined area in the form of an optical fiber cable formed by covering the optical fiber 10.
  • the conversion unit 21 incidents pulsed light on the optical fiber 10. Further, the conversion unit 21 receives the reflected light or scattered light generated as the pulsed light is transmitted through the optical fiber 10 as return light via the optical fiber 10.
  • the optical fiber 10 can detect the sound generated around the optical fiber 10.
  • the conversion unit 21 converts the return light on which the sound is superimposed received from the optical fiber 10 into acoustic data.
  • the conversion unit 21 can be realized by using, for example, a distributed acoustic sensor (DAS).
  • DAS distributed acoustic sensor
  • the output unit 22 outputs sound based on the acoustic data converted by the conversion unit 21.
  • the output unit 22 acoustically outputs sound from a speaker (not shown) or the like, or displays and outputs sound to a monitor (not shown) or the like.
  • the output unit 22 displays and outputs a sound, for example, the sound may be recognized by voice, and the result of the voice recognition may be displayed and output as characters.
  • the conversion unit 21 receives the return light on which the sound is superimposed from the optical fiber 10 and converts the return light into acoustic data (step S12). After that, the output unit 22 outputs sound based on the acoustic data converted by the conversion unit 21 (step S13).
  • the optical fiber 10 superimposes the sound generated around the optical fiber 10 on the return light (optical signal) transmitted through the optical fiber 10 and transmits and converts the sound.
  • the unit 21 converts the return light on which the sound is superimposed into acoustic data, and the output unit 22 outputs the sound based on the acoustic data.
  • the sound detected by the optical fiber 10 can be reproduced by the output unit 22 at another location.
  • the optical fiber 10 can detect sound at any place where the optical fiber 10 is laid, it can be used as a microphone.
  • the optical fiber 10 does not detect the sound at a point like a general microphone, but detects the sound at a line. Therefore, it is not necessary to arrange a general microphone according to the usage scene or connect it to an electric cable, and the setting becomes easy. Further, the optical fiber 10 can be laid over a wide range at low cost and easily. Therefore, the acoustic system can be flexibly constructed by using the optical fiber sensing system according to the first embodiment.
  • the acoustic data may be saved, and then the sound may be output based on the saved acoustic data.
  • the optical fiber sensing device 20 further includes a storage unit 25.
  • the conversion unit 21 stores the acoustic data in the storage unit 25, and the output unit 22 reads the acoustic data from the storage unit 25 and outputs the sound based on the read acoustic data.
  • the optical fiber sensing device 20 has a specific unit 23 and a notification unit 24 as compared with the configuration of FIG. 1 of the above-described first embodiment. The difference is that it has.
  • the identification unit 23 specifies the position where the sound is generated (the distance of the optical fiber 10 from that position to the conversion unit 21) based on the return light on which the sound is superimposed, which is received by the conversion unit 21.
  • the specific unit 23 produces the sound based on the time difference between the time when the conversion unit 21 incidents the pulsed light on the optical fiber 10 and the time when the return light on which the sound is superimposed is received by the conversion unit 21.
  • the distance of the optical fiber 10 from the generated position to the conversion unit 21 is specified.
  • the specific unit 23 holds in advance a correspondence table in which the distance of the optical fiber 10 and the position (point) corresponding to the distance are associated with each other, the sound is generated by using the correspondence table. It is also possible to specify the location (here, point A).
  • the specific unit 23 compares the intensity of the sound detected at the position corresponding to the distance for each distance of the optical fiber 10 from the conversion unit 21, and based on the comparison result, the position where the sound is generated.
  • the distance of the optical fiber 10 from that position to the conversion unit 21 may be specified.
  • the sound intensity is indicated by the size of a circle, and the larger the size of the circle, the higher the sound intensity.
  • the specifying unit 23 specifies the position where the sound is generated according to the distribution of the sound intensity.
  • the optical fiber 10 can also detect the vibration generated with the sound around the optical fiber 10.
  • the specific unit 23 is based on the time difference between the time when the conversion unit 21 incidents the pulsed light on the optical fiber 10 and the time when the return light on which the vibration generated with the sound is superimposed is received by the conversion unit 21.
  • the distance of the optical fiber 10 from the position where the sound is generated to the conversion unit 21 may be specified.
  • the conversion unit 21 can be realized by using a distributed vibration sensor (DVS). By using the distributed vibration sensor, the conversion unit 21 can also convert the return light on which the vibration is superimposed into vibration data.
  • DVDS distributed vibration sensor
  • the notification unit 24 When the output unit 22 outputs a sound, the notification unit 24 notifies the generation position as the generation position of the sound in association with the sound output by the output unit 22. For example, as shown in FIGS. 6 and 7, when the output unit 22 displays and outputs a sound, the notification unit 24, together with the sound displayed and output by the output unit 22, generates the sound (here, the point A). ) Is displayed and output. In addition, in FIG. 6 and FIG. 7, the sound and the position where the sound is generated are both displayed and output, but the present invention is not limited to this. For example, the output unit 22 may output the sound acoustically, and the notification unit 24 may display and output the sound generation position.
  • the specific unit 23 also stores the sound generation position in the storage unit 25 in association with the acoustic data. You may.
  • the notification unit 24 reads the sound generation position from the storage unit 25, associates the read sound generation position with the sound output by the output unit 22, and notifies the notification. To do.
  • the identification unit 23 specifies the position where the sound superimposed on the return light received from the optical fiber 10 is generated (step S24).
  • the notification unit 24 notifies the generation position specified by the specific unit 23 as the sound generation position in association with the sound output by the output unit 22 ( Step S25).
  • the identification unit 23 identifies the position where the sound superimposed on the return light received from the optical fiber 10 is generated, and the notification unit 24 has the output unit 22 sound. Is output, the generation position specified by the specific unit 23 is notified as the generation position of the sound in association with the sound output by the output unit 22.
  • the acoustic data converted by the conversion unit 21 has a unique pattern according to the type of sound source (for example, a person, an animal, a robot, a heavy machine, etc.) that is the source of the acoustic data. Therefore, the specifying unit 23 can identify the type of sound source of the sound that is the source of the acoustic data by analyzing the dynamic change of the pattern of the acoustic data.
  • the type of sound source for example, a person, an animal, a robot, a heavy machine, etc.
  • the identification unit 23 can not only identify the type of sound source as a person but also specify which person it is by analyzing the dynamic change of the pattern possessed by the acoustic data.
  • the specific unit 23 may specify a person by using, for example, pattern matching. Specifically, the specific unit 23 holds in advance the acoustic data of the voice of each of a plurality of persons as teacher data.
  • the teacher data may be learned by the specific unit 23 by machine learning or the like.
  • the specific unit 23 compares the pattern of the acoustic data converted by the conversion unit 21 with the pattern of the plurality of teacher data held in advance. When the specific unit 23 matches the pattern of any of the teacher data, the specific unit 23 identifies that the acoustic data converted by the conversion unit 21 is the acoustic data of the voice of a person corresponding to the matched teacher data.
  • the notification unit 24 associates the sound with the sound output by the output unit 22, and the generation position of the sound and the generation position specified by the specific unit 23 as the type of the sound source of the sound. Notify the type of sound source. For example, as shown in FIG. 9, when the output unit 22 displays and outputs a sound, the notification unit 24 displays and outputs the sound, the sound generation position (here, the point A), and the sound source. Type (here, person) is displayed and output. In FIG. 9, the sound, the position where the sound is generated, and the type of the sound source are both displayed and output, but the present invention is not limited to this. For example, the output unit 22 may output the sound acoustically, and the notification unit 24 may display and output the sound generation position and the type of the sound source.
  • the specific unit 23 also stores the sound generation position and the type of sound source in association with the acoustic data. It may be stored in the part 25.
  • the notification unit 24 reads the sound generation position and the sound source type from the storage unit 25, and the output unit 22 outputs the read sound generation position and the sound source type. Notify in association with the sound to be played.
  • the specifying unit 23 specifies the position where the sound superimposed on the return light received from the optical fiber 10 is generated, and also specifies the type of the sound source of the sound (step S34).
  • the notification unit 24 is specified by the specific unit 23 as the generation position of the sound and the type of the sound source of the sound in association with the sound output by the output unit 22. Notify the generation position and the type of sound source (step S35).
  • the specifying unit 23 specifies the position where the sound superimposed on the return light received from the optical fiber 10 is generated, and also specifies the type of the sound source of the sound.
  • the notification unit 24 associates the sound with the sound output by the output unit 22, and the sound generation position and the generation position specified by the specific unit 23 as the type of the sound source of the sound. And notify the type of sound source.
  • the optical fiber sensing system according to the fourth embodiment has the same configuration itself as the configuration of FIG. 4 of the above-described embodiments 2 and 3, but extends the function of the specific unit 23. doing. That is, the specifying unit 23 specifies the generation position of the sound and the type of the sound source of the sound for each of the plurality of sounds having different generation positions.
  • the example of FIG. 11 is an example in which sound is generated at two points A and B, respectively.
  • the point B is closer to the conversion unit 21 than the point A. Therefore, the conversion unit 21 first receives the return light on which the sound generated at the point B is superimposed. Therefore, the specifying unit 23 specifies the position where the sound generated at the point B is generated (here, the point B), and also specifies the type of the sound source of the sound (here, the cleaning robot). Subsequently, the conversion unit 21 receives the return light on which the sound generated at the point A is superimposed. Therefore, the specifying unit 23 specifies the position where the sound generated at the point A is generated (here, the point A), and also specifies the type of the sound source of the sound (here, the person).
  • the notification unit 24 associates the sound with the sound output by the output unit 22, and the generation position of the sound and the generation position specified by the specific unit 23 as the type of the sound source of the sound. Notify the type of sound source. For example, as shown in FIG. 12, when the output unit 22 displays and outputs the sound generated at the point B, the notification unit 24 displays and outputs the sound generated by the output unit 22 and the sound generation position (here, here). Point B) and the type of sound source (here, cleaning robot) are displayed and output.
  • the notification unit 24 displays and outputs the sound generated by the output unit 22, as well as the sound generation position (here, the point A) and the type of sound source (in this case, the point A).
  • the person is displayed and output.
  • the latest sound is displayed and output at the bottom.
  • the sound, the position where the sound is generated, and the type of the sound source are both displayed and output, but the present invention is not limited to this.
  • the output unit 22 may output the sound acoustically
  • the notification unit 24 may display and output the sound generation position and the type of the sound source.
  • the operations after step S32 in FIG. 10 may be performed for each of the plurality of sounds having different generation positions. Therefore, the description of the operation example of the optical fiber sensing system according to the fourth embodiment will be omitted.
  • the identification unit 23 specifies the generation position of the sound for each of the plurality of sounds having different generation positions, and also specifies the type of the sound source of the sound, and notifies the sound.
  • the unit 24 associates the sound with the sound output by the output unit 22, and specifies the sound generation position and the sound source type of the sound. Notifies the generation position and the type of sound source specified by.
  • the optical fiber sensing system according to the fifth embodiment is a conversion provided in the optical fiber sensing device 20 as compared with the configuration of FIG. 4 of the above-described embodiments 2 to 4.
  • the difference is that the unit 21 and the specific unit 23 are provided in a separate device (analyzer 31) and the optical fiber sensing device 20 is provided with a collection unit 26.
  • the collecting unit 26 incidents pulsed light on the optical fiber 10 and transmits the reflected light or scattered light generated by the pulsed light being transmitted through the optical fiber 10 to the return light (sound or sound) via the optical fiber 10. Received as (including return light with superimposed vibration). The return light received by the collecting unit 26 is transmitted from the optical fiber sensing device 20 to the analyzer 31.
  • the conversion unit 21 converts the return light into acoustic data
  • the specific unit 23 specifies the sound generation position and the type of sound source.
  • the analyzer 31 transmits the acoustic data converted by the conversion unit 21 and the sound generation position and the type of sound source specified by the specific unit 23 to the optical fiber sensing device 20.
  • the output unit 22 outputs a sound based on the acoustic data converted by the conversion unit 21, and the notification unit 24 associates the sound with the sound output by the output unit 22 by the specific unit 23. Notifies the generation position of the specified sound and the type of sound source.
  • the load required for the process of converting the return light into acoustic data and the process of specifying the sound generation position and the type of sound source is added. Can be dispersed in the apparatus (analyzer 31).
  • the conversion unit 21 and the specific unit 23 are separate devices (analytical devices) among the components provided in the optical fiber sensing device 20 of FIG. 4 of the above-described embodiments 2 to 4.
  • the output unit 22 may also be provided in a separate device (analyzer 31).
  • the notification unit 24 may be provided in a separate device (analyzer 31) together with the output unit 22. That is, the components provided in the optical fiber sensing device 20 of FIG. 4 of the above-described embodiments 2 to 4 are not limited to being provided in one device, but are distributed in a plurality of devices. You may.
  • the optical fiber sensing system according to the above-described embodiment is applied to an audio system.
  • the acoustic system a conference system, a monitoring system, and a sound acquisition system will be described as an example, but the acoustic system to which the optical fiber sensing system is applied is not limited to these.
  • the present application example 1 is an example in which the optical fiber sensing system according to the above-described embodiment is applied to a conference system.
  • the first application example is an example in which the optical fiber sensing system having the configuration of FIG. 4 of the second embodiment described above is applied.
  • the objects around which the optical fiber 10 is wound are the microphone (# A) 41A and the microphone (# B) 41B (hereinafter, which microphone (# A)). When it is not specified whether it is 41A or microphone (# B) 41B, it is referred to as microphone 41). Further, a speaker 32 and a monitor 33 are connected to the optical fiber sensing device 20.
  • the object around which the optical fiber 10 is wound is a PET bottle, but the present invention is not limited to this. Further, the object around which the optical fiber 10 is wound is a microphone 41, but the microphone 41 is not limited to this example.
  • -A cylindrical object in which an optical fiber 10 is wound-A optical fiber 10 is densely laid in a predetermined shape The laying shape of the optical fiber 10 is limited to, for example, a rod shape, a spiral shape, a star shape, etc. Not a thing
  • -A box in which an optical fiber 10 is wound-A product in which an object in which an optical fiber 10 is wound is covered-A product in which an optical fiber 10 is stored in a box (The optical fiber 10 does not necessarily have to be wound around an object, for example. , Stored in a box, embedded in the floor or desk, crawl on the ceiling, etc.)
  • the sound detected by the microphone (# A) 41A and the microphone (# B) 41B is acoustically output from the speaker 32 or displayed and output to the monitor 33.
  • the microphone (# A) 41A and the microphone (# B) 41B can be switched ON / OFF.
  • the output unit 22 does not output the sound detected by the microphone (# A) 41A, or the conversion unit 21 detects it by the microphone (# A) 41A. Do not convert the return light on which the sound is superimposed into acoustic data.
  • the conversion unit 21 and the output unit 22 may determine whether or not the sound is detected by the microphone (#A) 41A based on the sound generation position specified by the specific unit 23.
  • the notification unit 24 may notify the ON / OFF status of the microphone (# A) 41A and the microphone (# B) 41B. At this time, the notification unit 24 may display and output the status of the microphone (# A) 41A and the microphone (# B) 41B to the monitor 33, for example, as shown in FIG.
  • the optical fibers 10 are connected to each other by using the optical fiber connector CN.
  • the optical fiber connector CN For example, in the case of a configuration in which the optical fibers 10 are connected to each other without using the optical fiber connector CN, when the optical fiber 10 is cut or the like, it is necessary to use a dedicated tool or a person who does not have knowledge can deal with it. There was a problem that it could not be done. Therefore, by connecting the optical fibers 10 to each other using the optical fiber connector CN as in the first application example 1, maintenance and equipment replacement when a problem occurs can be easily performed. ..
  • the second application example is an example in which the optical fiber sensing system according to the above-described embodiment is applied to a conference system for conducting a video conference between a plurality of bases.
  • the second application example is an example in which the optical fiber sensing system having the configuration of FIG. 4 of the second embodiment described above is applied.
  • FIGS. 18 to 21 the table 42 is shown in a plan view, and the microphone 41 is shown in a front view.
  • the optical fiber 10 is comprehensively laid on the table 42 in the conference room.
  • sound can be detected at any place where the optical fiber 10 is laid, so that any place on the table 42 where the optical fiber 10 is laid functions as a microphone. Therefore, the optical fiber 10 can detect the voices of the conference participants located around the table 42.
  • the conference participants located around the table 42 are seated on the chairs around the table 42. If the specific unit 23 holds in advance a corresponding table in which the position of the chair and the distance of the optical fiber 10 from the position of the chair to the conversion unit 21 are associated with each other, a voice is generated using the corresponding table.
  • the optical fiber 10 is laid on the plate of the table 42, but the present invention is not limited to this.
  • the optical fiber 10 may be laid on the side surface or the back surface of the plate of the table 42, or may be embedded inside the table 42.
  • the optical fiber 10 may be laid on the floor, wall, ceiling, or the like in the conference room.
  • an object around which the optical fiber 10 is wound is used as the microphone 41, and the microphone 41 is arranged in the conference room.
  • the object around which the optical fiber 10 is wound is the microphone 41, but the microphone 41 is not limited to this example.
  • An example of the microphone 41 is as described in the example of FIG. Further, in FIG. 19, in order to further increase the sensitivity of the microphone 41, the optical fiber 10 may be wound around the object at a higher density.
  • FIGS. 18 and 19 are combined. As a result, not only the object around which the optical fiber 10 is wound can be used as the microphone 41, but also any part on the table 42 on which the optical fiber 10 is laid can function as a microphone.
  • the optical fiber 10 on the table 42 side and the optical fiber 10 on the microphone 41 side are connected by using the optical fiber connector CN.
  • the end portion of the optical fiber 10 on the table 42 side (the end portion on the opposite side of the optical fiber sensing device 20) is extended for connection with another configuration such as the microphone 41. This makes it easier to connect another configuration to the optical fiber 10 on the table 42 side.
  • FIG. 18 and FIG. 19 are combined, and the optical fiber 10 on the table 42 side and the optical fiber 10 on the microphone 41 side are connected by using the optical fiber connector CN.
  • the insertion port P of the optical fiber connector CN is provided on the table 42 side, and the optical fiber connector CN of the optical fiber 10 on the microphone 41 side is inserted into the insertion port P. ..
  • a hole H having a bottom surface is provided in the table 42, and an insertion port P is arranged in the bottom surface.
  • the optical fiber 10 on the table 42 side is embedded inside the table 42 and connected to the insertion port P.
  • the optical fiber connector CN of the optical fiber 10 on the microphone 41 side By inserting the optical fiber connector CN of the optical fiber 10 on the microphone 41 side into the insertion port P, the optical fiber 10 on the table 42 side and the optical fiber 10 on the microphone 41 side are connected.
  • the hole H is provided on the surface of the table 42, but the hole H may be provided on the side surface of the table 42.
  • each of the examples of FIGS. 18 to 21 is realized by laying one optical fiber 10.
  • each of the examples of FIGS. 18 to 21 is realized by one optical fiber 10 as described above, it is not necessary to provide a plurality of optical fiber sensing devices 20 by one. good. Therefore, in the examples of FIGS. 18 to 21, the setting becomes easier as compared with the case where a plurality of optical fiber sensing devices 20 are provided.
  • the optical fibers 10 are connected to each other by using the optical fiber connector CN. Therefore, since the number of optical fibers 10 in which the strands are exposed is reduced, the risk of disconnection and the like can be reduced.
  • the case where the sound generation position and the type of the sound source detected by the optical fiber 10 in the conference room of the base X are displayed and output to the monitor 44Y in the conference room of the base Y will be described as an example.
  • a table 42X, four chairs 43XA to 43XD, and a monitor 44X are arranged, and the conference participants sit on the chairs 43XA to 43XD and participate in the conference. It shall be.
  • chair 43X when it is not specified which chair 43XA to 43XD, it is referred to as chair 43X.
  • the optical fiber 10 is comprehensively laid on the table 42X, and any part of the table 42X on which the optical fiber 10 is laid functions as a microphone.
  • ⁇ Display example 1 in application example 2> First, a display example 1 in the present application example 2 will be described with reference to FIG. 24. In the display example 1 of FIG. 24, it is assumed that the output unit 22 acoustically outputs the voice spoken by the conference participants in the conference room of the base X from the speaker (not shown) in the conference room of the base Y.
  • the notification unit 24 displays and outputs the arrangement of the conference room of the base X on the monitor 44Y. Further, when the conference participant speaks in the conference room of the base X, the notification unit 24 displays and outputs a frame line surrounding the voice generation position (here, the position of the chair 43XA) of the conference participant on the monitor 44Y. ing.
  • the method of realizing the display example 1 of FIG. 24 is as follows, for example.
  • the specific unit 23 previously prepares a corresponding table (see FIG. 25) in which the positions of the chairs 43XA to 43XD and the distance of the optical fiber 10 from each position of the chairs 43XA to 43XD to the conversion unit 21 are associated with each other. Keep it.
  • the specific unit 23 specifies the distance of the optical fiber 10 from the position where the conference participant's voice is generated to the conversion unit 21, and uses the correspondence table to correspond to the specified distance. Identify the position of chair 43X.
  • the notification unit 24 displays and outputs the arrangement of the base X in the conference room. Further, when the conference participant speaks, the notification unit 24 displays and outputs a frame line surrounding the position of the chair 43X specified by the specific unit 23.
  • the notification unit 24 displays and outputs the names of the conference participants seated on the chairs 43XA to 43XD in the conference room of the base X on the monitor 44Y.
  • the method of acquiring the names of the conference participants seated in the chairs 43XA to 43XD is as follows.
  • the specific unit 23 stores the acoustic data of the voice of the person for each of a plurality of people in advance as teacher data in association with the name of the person and the like.
  • the teacher data may be learned by the specific unit 23 by machine learning or the like.
  • the identification unit 23 identifies the position of the chair 43X in which the conference participant is seated, as described above.
  • the specific unit 23 compares the pattern of the acoustic data of the voices of the conference participants with the pattern of the plurality of teacher data. When the pattern of any of the teacher data is matched, the identification unit 23 acquires the name of the person associated with the matched teacher data as the name of the conference participant sitting on the chair 43X specified above. To do.
  • the specific unit 23 may urge the conference participants to register their names, as shown in FIG.
  • the specific unit 23 detects the face image from the captured images in the conference room of the base X photographed by the photographing unit (not shown) by using the face recognition technology, and obtains the face image. All detected conference participants may be prompted to register their names.
  • the specific unit 23 tries to acquire the names of all the conference participants who have detected the face image from the captured image by using the above-mentioned teacher data of the acoustic data at the time of speaking during the conference, and cannot acquire the names. Only the conference participants may be prompted to register their names.
  • the specific unit 23 voice-recognizes the voice of the conference participant during the conference, analyzes the speech content based on the result of the voice recognition, and can identify the conference participant (for example, "How about Mr. XX?" Do you think? ”) To get the names of the conference participants.
  • the specific unit 23 may analyze the acoustic data of the conference participants during the conference, associate the acoustic data with the names of the conference participants, and hold the data as teacher data.
  • the acoustic data of the conference participants that were not retained as teacher data can be newly retained as teacher data, and the acoustic data of the conference participants that were retained as teacher data can be retained by the teacher. Since the data can be further accumulated, the accuracy of the teacher data can be improved. Therefore, when a conference participant participates in the conference from the next time onward, the conference participant can be smoothly identified and the name can be acquired.
  • the notification unit 24 displays and outputs a photographed image of the conference room of the base X photographed by the photographing unit (not shown) on the monitor 44Y.
  • This captured image corresponds to an image captured around the table 42X from the position of the monitor 44X in FIG. 23.
  • the captured image of FIG. 23 is not limited to this, and may include facial images of all the conference participants, regardless of the angle.
  • the notification unit 24 displays and outputs a frame line surrounding the face image of the conference participant on the monitor 44Y.
  • the method of realizing the display example 2 of FIG. 27 is, for example, as follows.
  • the specific unit 23 holds in advance a corresponding table (see FIG. 25) in which the positions of the chairs 43XA to 43XD and the distance of the optical fiber 10 from each position of the chairs 43XA to 43XD to the conversion unit 21 are associated with each other. I will do it.
  • the specific unit 23 specifies the distance of the optical fiber 10 from the position where the conference participant's voice is generated to the conversion unit 21, and uses the correspondence table to correspond to the specified distance. Identify the position of chair 43X.
  • the specific unit 23 holds the arrangement data in the conference room of the base X so that it can be determined which part the chairs 43XA to 43XD correspond to in the photographed image of the conference room of the base X. .. Then, the specific unit 23 detects a face image from the captured images in the conference room of the base X by using the face recognition technology, and is closest to the position of the chair 43X specified above from the detected face images. Identify the facial image at the location.
  • the notification unit 24 displays and outputs a captured image in the conference room of the base X. Further, when the conference participant speaks, the notification unit 24 displays and outputs a frame line surrounding the face image specified by the specific unit 23.
  • the notification unit 24 also displays and outputs the names (here, Michel) of the conference participants seated on the chair 43X specified above on the monitor 44Y.
  • the method of acquiring the names of the conference participants seated on the chair 43X specified above may be the same as that of the display example 1 described above, and thus the description thereof will be omitted.
  • the output unit 22 displays and outputs the voice of the conference participant on the monitor 44Y.
  • the notification unit 24 displays and outputs the face image of the conference participant on the monitor 44Y together with the voice displayed and output by the output unit 22. That is, in the display example 3 of FIG. 28, the voice and face image of the conference participants are displayed and output, for example, as in a chat. In the display example 3 of FIG. 28, the latest voice is displayed and output at the bottom.
  • the method of realizing the display example 3 of FIG. 28 is, for example, as follows.
  • the output unit 22 displays and outputs the voice of the conference participant.
  • the specific unit 23 holds in advance a corresponding table (see FIG. 25) in which the positions of the chairs 43XA to 43XD and the distance of the optical fiber 10 from each position of the chairs 43XA to 43XD to the conversion unit 21 are associated with each other. deep.
  • the specific unit 23 specifies the distance of the optical fiber 10 from the position where the conference participant's voice is generated to the conversion unit 21, and uses the correspondence table to correspond to the specified distance. Identify the position of chair 43X.
  • the specific unit 23 acquires a facial image of a conference participant sitting on the chair 43X specified above.
  • the notification unit 24 displays and outputs the face image acquired by the specific unit 23.
  • the method of acquiring the face image of the conference participant is as follows.
  • the specific unit 23 holds the arrangement data in the conference room of the base X so that it can be determined which part the chairs 43XA to 43XD correspond to in the photographed image of the conference room of the base X.
  • the identification unit 23 identifies the position of the chair 43X in which the conference participant is seated, as described above.
  • the specific unit 23 detects a face image from the captured images in the conference room of the base X by using the face recognition technology, and is closest to the position of the chair 43X specified above from the detected face images.
  • the face image at the position is acquired as the face image of the conference participant sitting on the chair 43X specified above.
  • the specific unit 23 stores the acoustic data of the voice of the person for each of a plurality of people in advance as teacher data in association with the name and face image of the person.
  • the teacher data may be learned by the specific unit 23 by machine learning or the like.
  • the identification unit 23 identifies the position of the chair 43X in which the conference participant is seated, as described above. Further, the specific unit 23 compares the pattern of the acoustic data of the voices of the conference participants with the pattern of the plurality of teacher data. When the pattern of the acoustic data of the voices of the conference participants matches the pattern of any of the teacher data, the identification unit 23 identifies the face image of the person associated with the matched teacher data above. It is acquired as a face image of a conference participant sitting on the chair 43X.
  • the notification unit 24 also displays and outputs the names of the conference participants (here, Michel) seated on the chair 43X specified above on the monitor 44Y.
  • the method of acquiring the names of the conference participants seated on the chair 43X specified above may be the same as that of the display example 1 described above, and thus the description thereof will be omitted.
  • the conference participants located around the table 42X are assumed to be seated on the chair 43X around the table 42X, but the chair 43X is not necessarily fixed. Therefore, as shown in FIG. 29, the table 42X is divided into a plurality of areas (here, areas A to F), and the specific unit 23 generates the voice of the conference participant when the conference participant speaks.
  • the location of the area that is, the location of the area where the conference participants who spoke may be located. In this case, if the specific unit 23 holds in advance a correspondence table (see FIG.
  • the table can be used to identify the location of the area where the voice was generated, that is, the location of the area where the conference participants who spoke were located.
  • This application example 3 is an example in which the optical fiber sensing system according to the above-described embodiment is applied to a monitoring system.
  • the third application example is an example in which the optical fiber sensing system having the configuration shown in FIG. 4 of the second embodiment described above is applied.
  • the monitoring areas monitored by the monitoring system are, for example, borders, prisons, commercial facilities, airports, hospitals, towns, harbors, plants, nursing care facilities, company buildings, nurseries, homes, and the like.
  • the following is an example of a monitoring system for parents to connect to the monitoring system via an application on a mobile terminal such as a smartphone and check the child's condition with the voice of the child when the monitoring area is a nursery school. Will be described.
  • the specific unit 23 associates the acoustic data of the child's voice with the identification information (name, identification number, etc.) of the guardian of the child for each of a plurality of children who will be the children of the nursery school, and uses it as teacher data. Hold in advance.
  • the teacher data may be learned by the specific unit 23 by machine learning or the like.
  • the guardian uses a monitoring system
  • the following operations are performed.
  • the guardian connects to the monitoring system via an application on the mobile terminal and transmits the identification information of the guardian.
  • the identification unit 23 identifies the acoustic data of the guardian's child's voice associated with the identification information from the teacher data held in advance. ..
  • the specific unit 23 compares the pattern of the acoustic data of the sound with the pattern of the acoustic data specified above.
  • the identification unit 23 protects the sound acoustic data detected by the optical fiber 10 with the sound data. Extracted as acoustic data of the child's voice.
  • the output unit 22 acoustically outputs a child's voice from a speaker or the like of a guardian's mobile terminal based on the acoustic data extracted by the specific unit 23.
  • the output unit 22 does not output voices other than the guardian's child.
  • the voices of children other than the parents' children and nursery teachers are not output, so it is possible to protect the privacy of others.
  • the specific unit 23 has extracted the acoustic data of the guardian's child by using pattern matching, but the present invention is not limited to this.
  • the specific unit 23 may use voice authentication technology to extract acoustic data of a guardian's child.
  • voice authentication technology for example, the following operations are performed.
  • the specific unit 23 holds in advance the characteristics of the acoustic data of the child's voice for each of a plurality of children who will be children in the nursery school, in association with the identification information (name, identification number, etc.) of the guardian of the child. Keep it.
  • the feature of this acoustic data may be one learned by the specific unit 23 by machine learning or the like.
  • the identification unit 23 selects the acoustic data of the guardian's child's voice associated with the identification information from the characteristics of the acoustic data held in advance. Identify features.
  • the specific unit 23 compares the characteristics of the acoustic data of the sound with the characteristics of the acoustic data specified above.
  • the identification unit 23 transfers the acoustic data of the sound detected by the optical fiber 10 to the child of the guardian. Extract as acoustic data of the voice of.
  • the present application example 4 is an example in which the optical fiber sensing system according to the above-described embodiment is applied to a sound acquisition system.
  • the third application example is an example in which the optical fiber sensing system having the configuration shown in FIG. 4 of the second embodiment described above is applied.
  • the sound collection area where the sound collection system collects sound is, for example, an area where people requiring attention such as borders, prisons, stations, airports, religious facilities, and surveillance facilities may appear.
  • people requiring attention such as borders, prisons, stations, airports, religious facilities, and surveillance facilities may appear.
  • an example of a sound collection system for collecting the voice of a person requiring attention in the sound collection area will be described.
  • the optical fiber 10 will be laid on the floor, walls, ceiling, outdoor underground, fence, etc. in the building.
  • the identification unit 23 identifies a person requiring attention. For example, when a suspicious person detection system (not shown) or the like analyzes the behavior of a person in the sound collecting area and identifies a suspicious person, the identification unit 23 identifies the suspicious person as a person requiring attention. Subsequently, the identification unit 23 identifies the position of the person requiring attention (the distance of the optical fiber 10 from that position to the conversion unit 21) in cooperation with the suspicious person detection system or the like.
  • the conversion unit 21 converts the return light on which the sound detected by the optical fiber 10 is superimposed at the position specified by the specific unit 23 into acoustic data.
  • the specific unit 23 analyzes the dynamic change of the pattern of the acoustic data, and extracts the acoustic data of the voice of the person requiring attention (voice when talking with another person requiring attention, etc.).
  • the output unit 22 acoustically outputs or displays the voice of a person requiring attention to the security system or the security guard room based on the acoustic data extracted by the specific unit 23.
  • the notification unit 24 may notify the security system or the security guard room that a person requiring attention has been found.
  • the computer 50 includes a processor 501, a memory 502, a storage 503, an input / output interface (input / output I / F) 504, a communication interface (communication I / F) 505, and the like.
  • the processor 501, the memory 502, the storage 503, the input / output interface 504, and the communication interface 505 are connected by a data transmission line for transmitting and receiving data to and from each other.
  • the processor 501 is, for example, an arithmetic processing unit such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit).
  • the memory 502 is, for example, a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory).
  • the storage 503 is, for example, a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a memory card. Further, the storage 503 may be a memory such as a RAM or a ROM.
  • the storage 503 stores a program that realizes the functions of the components (conversion unit 21, output unit 22, specific unit 23, and notification unit 24) included in the optical fiber sensing device 20. By executing each of these programs, the processor 501 realizes the functions of the components included in the optical fiber sensing device 20. Here, when executing each of the above programs, the processor 501 may read these programs on the memory 502 and then execute the programs, or may execute the programs without reading them on the memory 502.
  • the memory 502 and the storage 503 also play a role of storing information and data held by the components included in the optical fiber sensing device 20.
  • the memory 502 and the storage 503 also serve as the storage unit 25 in FIG.
  • Non-temporary computer-readable media include various types of tangible storage media.
  • Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs (Compact Disc-ROMs), CDs. -R (CD-Recordable), CD-R / W (CD-ReWritable), semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM.
  • the program also includes.
  • the computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • the input / output interface 504 is connected to the display device 5041, the input device 5042, the sound output device 5043, and the like.
  • the display device 5041 is a device that displays a screen corresponding to drawing data processed by the processor 501, such as an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube) display, and a monitor.
  • the input device 5042 is a device that receives an operator's operation input, such as a keyboard, a mouse, and a touch sensor.
  • the display device 5041 and the input device 5042 may be integrated and realized as a touch panel.
  • the sound output device 5043 is a device such as a speaker that acoustically outputs sound corresponding to acoustic data processed by the processor 501.
  • the communication interface 505 sends and receives data to and from an external device.
  • the communication interface 505 communicates with an external device via a wired communication path or a wireless communication path.
  • (Appendix 1) An optical fiber that transmits an optical signal on which sound is superimposed, A conversion unit that converts the optical signal into acoustic data, An output unit that outputs the sound based on the acoustic data, Optical fiber sensing system equipped with.
  • (Appendix 2) A specific unit that identifies the sound generation position based on the optical signal, and When the output unit outputs the sound, a notification unit that notifies the generation position of the sound in association with the sound output by the output unit, and a notification unit.
  • the specific unit identifies the type of sound source of the sound based on the pattern of the acoustic data. When the output unit outputs the sound, the notification unit notifies the sound generation position and the type of the sound source of the sound in association with the sound output by the output unit.
  • the optical fiber sensing system according to Appendix 2. (Appendix 4) The specific unit specifies the sound generation position and the type of sound source of the sound for a plurality of sounds having different generation positions. When the output unit outputs the sound for a plurality of sounds having different generation positions, the notification unit associates the sound with the sound output by the output unit, and causes the sound generation position and the sound source of the sound. Notify the type, The optical fiber sensing system according to Appendix 3.
  • the output unit reads the acoustic data from the storage unit and outputs the sound based on the read acoustic data.
  • the optical fiber sensing system according to Appendix 3 or 4.
  • the storage unit stores the sound generation position and the type of the sound source in association with the acoustic data.
  • the notification unit reads out the sound generation position and the type of the sound source from the storage unit, and reads out the sound generation position and the type of the sound source. Is associated with the sound output by the output unit and notified.
  • the optical fiber sensing system according to Appendix 5.
  • the optical fiber transmits an optical signal on which the sound generated around the object is superimposed.
  • the optical fiber sensing system according to any one of Appendix 1 to 6.
  • Appendix 8 A converter that converts an optical signal with superimposed sound transmitted by an optical fiber into acoustic data, An output unit that outputs the sound based on the acoustic data, An optical fiber sensing device equipped with.
  • Appendix 9 A specific unit that identifies the sound generation position based on the optical signal, and When the output unit outputs the sound, a notification unit that notifies the generation position of the sound in association with the sound output by the output unit, and a notification unit.
  • the optical fiber sensing device according to Appendix 8, further comprising.
  • the specific unit identifies the type of sound source of the sound based on the pattern of the acoustic data. When the output unit outputs the sound, the notification unit notifies the sound generation position and the type of the sound source of the sound in association with the sound output by the output unit.
  • the optical fiber sensing device according to Appendix 9. (Appendix 11) The specific unit specifies the sound generation position and the type of sound source of the sound for a plurality of sounds having different generation positions. When the output unit outputs the sound for a plurality of sounds having different generation positions, the notification unit associates the sound with the sound output by the output unit, and causes the sound generation position and the sound source of the sound. Notify the type, The optical fiber sensing device according to Appendix 10.
  • the output unit reads the acoustic data from the storage unit and outputs the sound based on the read acoustic data.
  • the optical fiber sensing device according to Appendix 10 or 11.
  • the storage unit stores the sound generation position and the type of the sound source in association with the acoustic data.
  • the notification unit reads out the sound generation position and the type of the sound source from the storage unit, and reads out the sound generation position and the type of the sound source. Is associated with the sound output by the output unit and notified.
  • the optical fiber sensing device according to Appendix 12.
  • the optical fiber transmits an optical signal on which the sound generated around an object accommodating the optical fiber is superimposed.
  • the optical fiber sensing device according to any one of Appendix 8 to 13.
  • This is a sound output method using an optical fiber sensing system.
  • a transmission step in which an optical fiber transmits an optical signal on which sound is superimposed
  • a conversion step for converting the optical signal into acoustic data
  • An output step that outputs the sound based on the acoustic data Sound output methods, including.
  • (Appendix 16) A specific step of identifying the sound generation position based on the optical signal, and When the sound is output in the output step, a notification step for notifying the generation position of the sound in association with the sound output in the output step, and a notification step.
  • (Appendix 17) In the specific step, the type of sound source of the sound is specified based on the pattern of the acoustic data.
  • the notification step when the sound is output in the output step, the sound generation position and the type of the sound source of the sound are notified in association with the sound output in the output step.

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