JP5305953B2 - Optical communication device and optical communication system using the optical communication device - Google Patents

Description

  The present invention relates to an optical communication device used for two-way audio communication by optical communication in a place where wireless communication is difficult, such as a construction site, and an optical communication system using the optical communication device. .

  For example, wireless communication is performed at a construction site or the like, and a communication device such as a transceiver is used (for example, see Non-Patent Document 1).

CQ Publisher “Wireless Data Transmission and the Internet” 1998 edition

  However, in the construction of shielded rooms where radio cannot be used, and in construction sites where it is difficult to communicate wirelessly due to restrictions on communication distance, etc. due to the structure of the building, instructions can be given simultaneously to each construction site via radio, It is not possible to communicate between construction sites. Therefore, there is a demand for a communication apparatus capable of simultaneous calls that can be instructed and communicated at a plurality of locations simultaneously using a method other than wireless at a construction site as described above. In particular, in the construction of train tracks, etc., construction at multiple locations is performed almost simultaneously, but it may be necessary to divide the construction workers into multiple groups and to give different instructions and communications for each group, In such a case, a communication device that can appropriately perform simultaneous calls is desired.

  The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is to provide a light that can be simultaneously communicated at a plurality of locations separated from each other, for example, for each of a plurality of groups. An object of the present invention is to provide a communication device and an optical communication system using the optical communication device.

In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the optical communication device of the first invention has first and second media converters and an electric circuit,
Each of the first and second media converters is connected to a communication optical fiber connection unit for bidirectional optical communication of the audio signal as a time division multiplexed optical signal having a plurality of time slots.
The electric circuit includes the first and second media converters, an audio input unit, an audio output unit, and an identification signal for selecting one or a plurality of the time slots in each divided region of the time division multiplexed optical signal. The input operation unit is connected,
The electrical circuit includes
A first audio signal assigned to one or more time slots selected by the identification signal input operation unit is extracted from a time-division audio signal optically received by the first media converter and converted into an electric signal. An extraction circuit of
A first speech synthesis circuit for synthesizing a speech signal of an electrical signal input from the speech input unit to the speech signal extracted by the first extraction circuit;
A first identifier synthesizing circuit that assigns the voice signal synthesized by the first voice synthesizing circuit to one or a plurality of time slots selected by the identification signal input operation unit;
Wherein by combining the signals except the audio signal extracted by said first extracting circuit from the time division speech signal by the first identifier combining circuit to the Times Lock audio signals assigned to preparative second medium A first data block synthesis circuit to be sent to the converter side;
A second audio signal assigned to one or more time slots selected by the identification signal input operation unit is extracted from a time-division audio signal optically received and converted into an electric signal by the second media converter. An extraction circuit;
A second voice synthesis circuit that synthesizes a voice signal of an electrical signal input from the voice input unit to the voice signal extracted by the second extraction circuit;
A second identifier synthesizing circuit that assigns the voice signal synthesized by the second voice synthesizing circuit to one or a plurality of time slots selected by the identification signal input operation unit;
The first media converter by synthesizing the audio signal assigned to the time slot by the second identifier synthesis circuit and excluding the audio signal extracted from the time-division audio signal by the second extraction circuit. A second data block synthesis circuit to be sent to the side,
A third speech synthesis circuit that synthesizes the extracted signals extracted by the first and second extraction circuits and sends the synthesized signals to the speech output unit is used as means for solving the problem.

Further, in the optical communication device of the second invention, in addition to the configuration of the first invention, a plurality of optical communication devices are connected in series via communication optical fibers connected to the first and second media converters. It forms a structure in which an optical communication system is formed Te, identification signal input operation unit, a plurality of identification symbols for identifying the group to each group is predetermined in the light communication apparatus for forming the optical communication system with Ru operation unit der selects set configure settings timeslots to correspond is set to means for solving the problems in the.

Furthermore, the optical communication device of the third invention, in addition to the configuration of the second invention, in addition to the set time slot corresponding to the identification symbol determined corresponding to the identification symbol input by the identification signal input operation unit, An all-optical transmission / reception selection operation unit for optical transmission / reception selection operation with all the optical communication devices forming the optical communication system is set with a common setting time slot for all the optical communication devices forming the optical communication system. provided that, when the light transmitting and receiving selection operation該全optical transceiver selection operation unit is performed, the audio signal inputted from the voice input unit is assigned to all time slots, the third speech synthesis circuit the common The audio signal assigned to the set time slot is sent to the audio output unit side.

  Furthermore, an optical communication device according to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, is input with an identification symbol input by operating the identification signal input operation unit and an identification signal input of another group of optical communication devices. An identification symbol distinction display unit for displaying the distinction from the identification symbol input by the operation unit is provided.

  Further, the optical communication device of the fifth invention is provided with a spare optical transmission optical fiber in addition to the configuration of any one of the first to fourth inventions, at both ends of the optical transmission optical fiber. Are each provided with a connection for connecting a communication optical fiber, and instead of connecting the communication optical fiber to the first and second media converters, a skip connection is connected to both ends of the optical transmission optical fiber. An operation unit is provided.

  In addition to the configuration of any one of the first to fifth inventions, the optical communication device of the sixth invention distinguishes between optical reception by the first media converter and optical reception by the second media converter. And a reception distinction display section.

  Furthermore, an optical communication device according to a seventh aspect of the invention includes, in addition to the configuration of any one of the first to sixth aspects, a wavelength of an optical signal transmitted from the optical signal transmission / reception unit of the first media converter, The wavelength of the optical signal transmitted from the optical signal transmitting / receiving unit of the media converter is different from each other.

  Furthermore, an optical communication system according to an eighth aspect of the present invention includes a plurality of optical communication devices according to any one of the first to seventh aspects, and optical signal transmission / reception of the first media converter of the first optical communication device. The optical signal transmitting / receiving unit of the first media converter of the adjacent optical communication device and the second optical converter are connected to the first optical converter of the second optical communication device via the communication optical fiber. The optical signal transmission / reception unit of the second media converter is connected by a communication optical fiber as means for solving the problem.

  According to the present invention, the optical communication device is provided in each of the optical signal transmitting / receiving units of the first and second media converters having a function of converting an optical signal into an electrical signal and a function of converting an electrical signal into an optical signal. A connection portion of a communication optical fiber for two-way optical communication of an audio signal is connected, and the audio signal received by the optical communication device through the communication optical fiber connected to the connection portion is the first and the second. First and second voice synthesizing circuits of the electric circuit which are converted into electric signals by the second media converter and the audio signals of these electric signals are respectively connected to the electric signal transmitting unit and the electric signal receiving unit of the media converter. Thus, it is combined with the audio signal of the electrical signal input from the audio input unit.

  Then, since the audio signal of the electric signal combined by the first audio synthesizing circuit is sent to the electric signal receiving unit side of the second media converter, this signal is converted into the audio signal of the optical signal by the second media converter. The optical communication of the audio signal can be performed via the communication optical fiber. Similarly, since the audio signal of the electric signal combined by the second audio synthesizing circuit is sent to the electric signal receiving unit side of the first media converter, this signal is sent to the audio signal of the optical signal by the first media converter. It is possible to perform optical communication of an audio signal through the communication optical fiber.

  In other words, according to the optical communication device of the present invention, the audio signal input from the audio input unit of the optical communication device and the optical communication device on the connection partner side connected to the optical communication device via the communication optical fiber (for example, Audio signals sent from the first connection counterpart device and the second connection counterpart device can be combined, and the combined audio signals can be communicated differently from the audio signal transmission side. (For example, a voice signal sent from the first connection counterpart device is sent to the second connection counterpart device and sent from the second connection counterpart device). Therefore, the voice signal can be easily bidirectionally communicated between the optical communication apparatuses connected via the communication optical fiber.

  Also, according to the optical communication device of the present invention, the optical signal transmitting / receiving unit of the first and second media converters receives the light, converts it into an electrical signal, and outputs it by the third voice synthesis circuit of the electrical circuit. Since the respective audio signals are combined and sent to the audio output unit side, the communicated audio signal is output from the audio output unit and can be heard by the user.

  In the present invention, when the voice signal multiplexed by the first and second voice synthesis circuits is also output from the voice output unit without providing the third voice synthesis circuit, it is input from the voice input unit. The voice signal (for example, the voice of the operator here) is output from the voice output unit together with the voice signal input from the connection partner via the media converter. Then, the voice re-input operation in which the worker's voice output from the voice output unit (for example, a speaker or the like) is re-input from the voice input unit generally disposed at a distance not far from the voice output unit occurs. It will be.

  Usually, since the audio signal input to the audio input unit and the audio signal output from the audio output unit are each amplified to an appropriate level, the signal input from the audio input unit is amplified, Multiplexed by the voice synthesis circuit, and further, the multiplexed voice signal is amplified and output from the voice output unit. When the voice re-input operation is performed, the operator's voice is output to the input side and the output side. As a result, it will be amplified again and again, causing a howling failure.

  On the other hand, the present invention is provided with the first, second, and third speech synthesis circuits as described above, and the first and second speech synthesis circuits correspond to the first and second, respectively. A voice signal received from the connection partner side by the optical communication device via the media converter and a voice signal input from the voice input unit are sent to the corresponding media converter side. Since the optical communication device sends the audio signal received from the connection partner side to the audio output unit side via the second media converter, the above-described howling failure can be reliably prevented.

  Therefore, by forming the optical communication system of the present invention using the optical communication apparatus of the present invention, bidirectional optical communication of audio signals using optical fibers is performed between a plurality of (for example, 10 or more) optical communication apparatuses. By using an optical fiber, a high-quality voice signal can be communicated between optical communication devices arranged adjacent to each other with a long distance of 40 km, for example.

  In the present invention, the audio signal is optically communicated as a time-division multiplexed optical signal, and a plurality of time slots of the time-division multiplexed optical signal (each divided when the subsequent time region is divided into a plurality of times). By setting an appropriate time slot in the area), it is possible to satisfactorily make a call between, for example, setting groups among a plurality of connected optical communication apparatuses. That is, in the present invention, the signals assigned to the predetermined set time slots are extracted from the time-division audio signals that are optically received by the first and second media converters and converted into electrical signals. By synthesizing (adding) these signals and sending them to the audio output unit, only the signal assigned to the set time slot can be synthesized as an audio signal and output from the audio output unit. The user can hear only the necessary audio signal without outputting the signal from the audio output unit.

  The signal obtained by combining the extracted signal and the audio signal of the electrical signal input from the audio input unit is combined with a signal obtained by removing the extracted signal from the time-division audio signal, and a communication optical fiber via a media converter. Using this signal, optical communication with another optical communication device is performed.

  Therefore, for example, in a configuration in which an optical communication system is formed by connecting a plurality of optical communication devices in series via communication optical fibers connected to the first and second media converters, the optical communication system is formed. By having a function of inputting an identification symbol for identifying the group for each predetermined group among the plurality of optical communication devices, and setting a setting time slot corresponding to the input identification symbol, In a state where a plurality of optical communication devices are connected in series, a necessary call can be performed only between the groups. For example, a call can be performed simultaneously between the plurality of groups.

  In addition, in the optical communication device of the present invention, in addition to the set time slot corresponding to the identification symbol determined corresponding to the identification symbol input by the identification signal input operation unit, all the optical communication devices forming the optical communication system In an optical communication apparatus in which a common set time slot is set, the following use is possible by using an audio signal assigned to the common set time slot.

  That is, in this configuration, when the all-optical transmission / reception selection operation unit is operated, the audio signal input from the audio input unit of the optical communication device that has performed this operation is assigned to all the time slots, so that the connection partner Since all the optical communication devices can output the audio signal from the optical communication device that has operated the all-optical transmission / reception selection operation unit from the audio output unit, it is possible to transmit commands and the all-optical transmission / reception The optical communication device that has performed the operation of the selection operation unit transmits the audio signal assigned to the setting time slot common to all the optical communication devices to the audio output unit side, so that all the optical communication devices of the connection partner can By outputting the audio signal from the audio output unit, the audio signal can be heard by the user of this apparatus.

  Furthermore, in the optical communication device of the present invention, an identification symbol for displaying the distinction between the identification symbol input by operating the identification signal input operation unit and the identification symbol input by the identification signal input operation unit of the optical communication device of another group In the case where the distinction display unit is provided, the identification symbols with other groups of optical communication devices can be easily distinguished, and the identification signal input operation can be performed accurately.

  Further, in the optical communication device according to the present invention, in the configuration in which the spare optical transmission optical fiber is provided and the connection portions for connecting the communication optical fibers are provided on both ends thereof, the skip connection operation portion is operated. Thus, the communication optical fiber can be connected to both ends of the optical transmission optical fiber without being connected to the first and second media converters. Even when it is necessary to remove the optical communication device, it is possible to easily form an optical communication system in which the optical communication device in which a failure or the like occurs is disconnected while the optical communication devices are connected in series.

  Furthermore, in the optical communication device of the present invention, in the configuration having the reception distinction display unit for displaying the optical reception by the first media converter and the optical reception by the second media converter, two are connected to the optical communication device. It is possible to instantly identify which side of the communication optical fiber is a signal transmitted from the communication optical fiber, thereby improving convenience.

  Furthermore, in the optical communication device of the present invention, the wavelength of the optical signal transmitted from the optical signal transmission / reception unit of the first media converter and the wavelength of the optical signal transmitted from the optical signal transmission / reception unit of the second media converter are mutually different. According to the configuration with different wavelengths, bidirectional optical communication between optical communication devices using light of different wavelengths can be performed accurately without worrying about crosstalk.

  Furthermore, according to the optical communication system of the present invention, by forming a plurality of optical communication devices having the above-described effects by being connected in series, a plurality of optical communication devices can be provided at a plurality of locations even in places where radio communication is not possible. A system capable of making a call between groups can be easily constructed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block configuration of an embodiment of an optical communication device according to the present invention, and FIG. 2 schematically shows an example of an optical communication system using the optical communication device of this embodiment. It is shown.

  The optical communication device 1 according to the present embodiment forms an optical communication system capable of transmitting and receiving audio signals by being connected in series via a communication optical fiber 2, for example, as shown in FIG. is there. The communication optical fiber 2 is an optical fiber for bidirectionally communicating an audio signal as a time division multiplexed optical signal having a plurality of time slots. The length of the communication optical fiber 2 is not particularly limited, and is set as appropriate. For example, the length can be set to 40 km or more (for example, about 60 km) as necessary.

  As shown in FIG. 1, the optical communication device 1 of the present embodiment has a control circuit 50, and FIG. 1 shows a state in which the communication optical fiber 2 is connected to the control circuit 50. The control circuit 50 includes first and second media converters (optical / electrical converters) 3 and 4 as a pair, and an electric circuit 10 connected to the first and second media converters 3 and 4. Configured.

  The electric circuit 10 includes a PS (parallel serial) conversion circuit 8 (8a, 8b), an SP (serial parallel) conversion circuit 9 (9a, 9b), a data organization circuit 13 (13a, 13b), and a data restoration circuit 14 (14a, 14b), Gr (group) identification extraction circuit 15, voice block total Gr (group) synthesis circuits 16, 17, first extraction circuit 18, second extraction circuit 19, voice Gr (group) identifier synthesis circuits 20, 21 , DA (digital / analog) conversion circuits 22 and 23, AD (analog / digital) conversion circuits 24 and 25, a first voice addition circuit (first voice synthesis circuit) 26, a second voice addition circuit (second voice) Synthesis circuit) 27, third voice addition circuit (sound synthesis circuit) 28, voice amplification circuit 29, and amplification circuit 30.

  The electric circuit 10 is connected to a microphone 32 as an audio input unit, a speaker 31 as an audio output unit, an audio Gr (group) display unit 33, and a Gr (group) selection switch 34. As shown in FIG. 2, the microphone 32 is connected to the housing of the optical communication device 1 via a connection line 44.

  As shown in FIG. 1, the first and second media converters 3 and 4 include an optical signal transmitting / receiving unit 5 (5a, 5b), an electric signal transmitting unit 6 (6a, 6b), and an electric signal receiving unit 7, respectively. (7a, 7b), an EO conversion circuit 35 (35a, 35b) for converting an electric signal into an optical signal, and an OE conversion circuit 36 (36a, 36b) for converting an optical signal into an electric signal. The first and second media converters 3 and 4 have an EO conversion circuit 35 and an OE conversion circuit 36, thereby converting the optical signal received by the optical signal transmitting / receiving unit 5 (5a, 5b) into a digital electric signal. Then, the function of outputting from the electric signal transmitting unit 6 (6a, 6b) and the digital electric signal received by the electric signal receiving unit 7 (7a, 7b) are converted into an optical signal to convert the optical signal transmitting / receiving unit 5 And a function of transmitting from (5a, 5b).

  Connection portions 11 and 12 of the communication optical fiber 2 are connected to the optical signal transmission / reception portions 5 (5a and 5b) of the first and second media converters 3 and 4, respectively. Corresponding optical fibers 2 are connected through optical connectors 21 and 22, for example. Note that the optical signals that are bidirectionally communicated in the present embodiment are, for example, time-division multiplexed optical signals having a plurality of time slots indicated by HA to HD and a to h in FIG. HA to HD denote time slots for assigning headers, and a to h denote time slots for assigning audio signals. When a signal is assigned to at least one of the time slots a to h, time division multiplexed optical communication of an audio signal is performed.

  In this embodiment, the wavelength of the optical signal transmitted from the optical signal transmission / reception unit 5a of the first media converter 3 is set to 1550 nm, and the optical signal transmitted from the optical signal transmission / reception unit 5b of the second media converter 4 is processed. The wavelength is 1310 nm, and both wavelengths are different from each other. Although these wavelengths are not particularly limited, it is possible to prevent the signals to be communicated from being mixed by making the two wavelengths different from each other. In particular, since the wavelength applied in this embodiment is a wavelength currently used for optical communication, good optical communication can be performed by applying the above wavelength.

The electric signal transmitting unit 6 and the electric signal receiving unit 7 of the first and second media converters 3 and 4 are both connected to the electric circuit 10, and in this embodiment, the electric circuit 10 causes a microphone to be connected. The voice signal of the electrical signal input to the optical communication device 1 from 32 and the audio signal of the optical signal received by the first and second media converters 3 and 4 are used as identification symbols given in advance to the optical communication device. Correspondingly, by multiplexing for each group, it is possible to make a call for each group between a plurality of optical communication apparatuses 1 connected in series. Hereinafter, each component of the electric circuit 10 will be described.

SP conversion circuit 9 (9 a, 9 b), the first, the second corresponding media converter, is converted into an electric signal from the optical signal having a plurality of time slots as shown in FIG. 3 (a) The serial signal is converted into a parallel signal, and from the beginning of the header to the end of the audio signal (HA to h) is converted into a parallel signal as a set of signals, and the corresponding data restoration circuit 14 (14a, 14a, 14b).

Data recovery circuit 14 (14a, 14b), in the electrical signal applied from the SP conversion circuit 9 (9 a, 9 b) , except a signal corresponding to the header, as shown in FIG. 3 (b), audio data A digital electrical signal indicating This signal has a plurality of blocks (referred to herein as time division regions of the electrical signal) corresponding to the time slot, and includes a Gr identification extraction circuit 15 and corresponding first and second extractions. (Added from the data restoration circuit 14a to the first extraction circuit 18 and from the data restoration circuit 14b to the second extraction circuit 19).

  The Gr selection switch 34 functions as an identification signal input operation unit for inputting an identification symbol for identifying a predetermined group for each predetermined group among the plurality of optical communication devices 1 forming the optical communication system. is there. For example, the optical communication device 1 has a number indicating an identification symbol, “No. 1-No. Eight switches are arranged, and when the user selects one of them and presses the selected switch (turns on the switch), an identification symbol is input. The signal of the identification symbol selected and input by the Gr selection switch 34 is applied to the first and second extraction circuits 18 and 19.

  The Gr identification extraction circuit 15 receives the voice data signal added from the data restoration circuit 14 (14a, 14b), extracts the identification symbol input by the identification signal input operation unit of the optical communication device of another group, This is added to the voice Gr display unit 33. That is, the Gr identification extraction circuit 15 is based on the digital electric signal having a plurality of blocks (blocks corresponding to the time slots of the optical signal) as shown in FIG. When a voice signal is assigned to a time slot other than the time slot set corresponding to the identification symbol input by the Gr selection switch 34, the assigned time slot is detected and the time slot is supported. Then, the identification symbol input by the identification signal input operation unit of the optical communication device of another group is detected (extracted) and added to the voice Gr display unit 33.

  For example, when the optical communication device 1 itself selects a time slot corresponding to d in FIG. 3A, the data added from the data restoration circuit 14 is changed to c and f in FIG. If an audio signal is also assigned to the corresponding time slot, it is determined that the time slots c and f are used by the optical communication apparatus 1 of another group, and the determination signal is sent to the audio Gr display unit 33. Add.

The voice Gr display unit 33 functions as an identification symbol distinction display unit that displays the distinction from the identification symbol input by the Gr selection switch 34. Although this display is not particularly limited, in the present embodiment, the number (for example, No. 4) of the Gr selection switch 34 corresponding to the time slot assigned to the optical communication device 1 itself flashes. The number of the Gr selection switch 34 corresponding to the time slot used by the optical communication device 1 of another group (for example, No. 3 and No. 6 when the time slot is c or f ) is turned on. Is formed. Note that the Gr identification extraction circuit 15 and the voice Gr display unit 33 can be omitted.

  The first and second extraction circuits 18 and 19 extract a signal assigned to a predetermined set time slot from the audio data signal added from the data restoration circuit 14. This set time slot is set in correspondence with the identification symbol input by the Gr selection switch 34. For example, the Gr selection switch 34 No. When the time slot shown in d of FIG. 3A is set by pressing 4, and this time slot is set as the set time slot, the signal assigned to the set time slot, that is, the set time slot is supported. The audio signal of the block d in the digital electric signal of FIG. 3B is extracted by the first and second extraction circuits 18 and 19 (broken arrows from FIG. 3B to FIG. 3C) ,reference). The extracted audio signals are added to the corresponding DA conversion circuits 22 and 23, respectively, and the signals other than the extracted signals are added to the audio block all Gr synthesis circuits 16 and 17.

  The DA conversion circuits 22 and 23 convert the digital electric signals applied from the first and second extraction circuits 18 and 19 into analog electric signals. The analog electric signal converted by the DA conversion circuit 22 is added to the first and third audio addition circuits 26 and 28, and the analog electric signal converted by the DA conversion circuit 23 is added to the second and third audio addition circuits 27. , 28.

  The third audio adding circuit 28 synthesizes the extracted signals extracted by the first and second extracting circuits 18 and 19 and sends the synthesized signals to the speaker 31 side via the audio amplifying circuit 29. The audio signal amplified by the audio amplifier circuit 29 and sent to the speaker 31 is output from the speaker 31 and transmitted to the user of the optical communication device 1. Although not shown in FIG. 1, the optical communication device 1 is provided with an adjustment operation unit such as a volume of an audio signal output from the speaker 31.

  The first audio adding circuit 26 matches the audio signal of the electrical signal input from the microphone 32 with the extracted signal extracted by the first extracting circuit 18. The second sound adder circuit 27 matches the sound signal of the electrical signal input from the microphone 32 with the extracted signal extracted by the second extractor circuit 19. In the present embodiment, the audio signal input from the microphone 32 is amplified by the amplifier circuit 30 and applied to the first and second audio adder circuits 26 and 27. The audio signals synthesized by the first and second audio adder circuits 26 and 27 are converted into digital electric signals by the corresponding AD conversion circuits 24 and 25, respectively, and added to the corresponding audio Gr identifier synthesis circuits 20 and 21. It is done.

The voice Gr identifier synthesis circuit 20 functions as a first identifier synthesis circuit, the voice Gr identifier synthesis circuit 21 functions as a second identifier synthesis circuit, and is a digital signal of a synthesized signal added from the AD conversion circuits 24 and 25. In response to an electrical signal, this signal is assigned to a set time slot, for example, from FIG. 3 (c) to FIG. 3 (b) corresponding to the identification symbol input by operating the Gr selection switch 34. As shown by the solid line arrow, the composite signal is assigned to the block d (block corresponding to the set time slot) of the digital electric signal shown in FIG. This assigned signal is applied to the voice block full Gr synthesis circuits 16 and 17.

The voice block total Gr synthesis circuit 16 functions as a first data block synthesis circuit, and is a signal added from the voice Gr identifier synthesis circuit 20 (that is, a voice signal synthesized by the first voice addition circuit 26). In addition, a signal obtained by removing the extracted signal from the time-division audio signal (this signal is added from the first extraction circuit 18 to the audio block full Gr synthesis circuit 16) is added via the data organization circuit 13b. Send to the second media converter 4. The audio block total Gr synthesis circuit 16 synthesizes, for example, a signal assigned to d in FIG. 3B and a signal assigned to a block other than d (eg, assigned to c and f). To the data organization circuit 13b.

The voice block total Gr synthesis circuit 17 functions as a second data block synthesis circuit, and is a signal added from the voice Gr identifier synthesis circuit 21 (that is, the voice synthesized by the second voice addition circuit 27). A signal obtained by removing the extracted signal from the time-division audio signal (this signal is added from the second extraction circuit 19 to the audio block full Gr synthesis circuit 17), and a data organization circuit 13a is added. To the first media converter 3. For example, a signal assigned to d in FIG. 3B and a signal assigned to a block other than d are combined and applied to the data organization circuit 13a.

  The data organization circuit 13 adds the signal corresponding to the header to the audio signal added from the corresponding audio block all Gr synthesis circuits 16 and 17, and adds the signal to the corresponding PS conversion circuit 8 (8a, 8b).

  The PS conversion circuit 8 (8a, 8b) serially converts the parallel electric signal applied from the data organization circuit 13 (13a, 13b) and applies it to the corresponding first and second media converters 3, 4.

  FIG. 3 is a schematic image diagram showing a conversion configuration of an optical signal, a digital electric signal, and an analog electric signal. In the figure, solid arrows in the direction from FIG. 3 (e) to FIG. 3 (d) indicate a configuration for converting an analog electric signal to a digital electric signal, and the direction from FIG. 3 (d) to FIG. 3 (e). A broken-line arrow indicates a configuration for converting a digital electric signal into an analog electric signal. Further, the arrow in the direction from FIG. 3D to FIG. 3C indicates a configuration in which a digital electric signal is repeatedly transmitted in accordance with the transmission speed of the optical signal.

  Also, the arrow in the direction from FIG. 3C to FIG. 3B indicates a configuration in which the audio signal is assigned to the block of the digital electric signal corresponding to the time slot of the optical signal by the audio Gr identifier synthesis circuits 20 and 21. On the contrary, the arrows in the direction from FIG. 3B to FIG. 3C indicate the configuration for extracting the audio signal of the block corresponding to the set time slot from the block of the digital electric signal. .

  As shown in FIG. 1, the optical communication device 1 of the present embodiment is provided with an optical skip fiber 40 as a spare optical transmission optical fiber, and both ends of the optical skip fiber 40. Are provided with optical connectors 48 and 49 as connecting portions for connecting the communication optical fiber 2. In addition, instead of connecting the communication optical fiber 2 to the first and second media converters 3 and 4 via the optical connectors 21 and 22, a skip connection operating unit (see FIG. Not shown).

  This embodiment is configured as described above, and inputs an identification symbol for identifying the group for each predetermined group among the plurality of optical communication devices 1 forming the optical communication system. In the state where a plurality of optical communication devices are connected in series by setting a set time slot corresponding to the identified identification symbol and combining the electrical signals assigned to the set time slot as described above, Necessary calls can be made only between groups.

  Further, in the present embodiment example, regarding the optical communication of the audio signal, the transmission / reception of signals necessary for communication of other groups other than the group set in each optical communication device 1 is also performed. Of these, since only the necessary audio signal is output from the speaker 31, the above-described effects can be achieved with a very simple system configuration in which a plurality of optical communication devices 1 are connected in series. Can do.

  In addition, this invention is not limited to the said embodiment, It can take various aspects. For example, in the above embodiment, the speaker 31 is provided as the sound output unit. However, the sound output unit may be provided with headphones in addition to the speaker 31 or may be provided with only headphones.

  Further, in addition to the function of making a call between groups in the plurality of optical communication devices 1 connected, a function of making a call with all the optical communication devices 1 may be provided as necessary. In this case, in addition to the set time slot corresponding to the identification symbol (for example, d in FIG. 3A) determined in correspondence with the identification symbol input by the Gr selection switch 34, all optical communications forming the optical communication system A setting time slot (for example, a in FIG. 3A) common to the apparatus is set. Then, the audio signal is assigned to both the setting time slot d corresponding to the identification symbol and the common setting time slot a, and the audio Gr identifier synthesizing circuits 20 and 21 block the electric signal as shown in FIG. Is assigned.

  In addition, an all-optical transmission / reception selection operation unit for optical transmission / reception selection operation with all the optical communication devices 1 forming the optical communication system is provided, and when the all-optical transmission / reception selection operation unit is operated, a voice input unit ( The audio signal input from the microphone 32 or the like is assigned to all the time slots (see the broken line arrow in the image diagram of FIG. 4B). Further, the third speech synthesis circuit (speech addition circuit) 28 sends the speech signal assigned to the common set time slot (for example, a in FIG. 4A) to the speech output unit side such as the speaker 31. The configuration.

  In this way, as shown in FIG. 5, a voice signal such as a command from the optical communication device 1a of the headquarters is sent to all the other optical communication devices 1 and output from the speakers 31 of each optical communication device 1. In addition, the optical communication device 1a of the headquarters can check and output a voice signal such as a report from all the other optical communication devices 1 from the speaker 31 of the optical communication device 1a.

  Furthermore, in the above embodiment, the first, second, and third audio adder circuits 26, 27, and 28 are converted by the analog analog electrical signals input from the microphone 32 and the DA converter circuits 22 and 23. The analog electric signal is synthesized, but a circuit for converting the analog electric signal of the sound input from the microphone 32 into a digital electric signal is provided, and the digital electric signal and the first and second extraction circuits 18 and 19 are provided. It is good also as a structure which synthesize | combines with the digital electric signal extracted by this.

  Further, the optical communication device 1 may be provided with a reception distinction display unit that distinguishes between light reception by the first media converter 3 and light reception by the second media converter 4.

It is a block diagram which shows the control structure of one Example of the optical communication apparatus which concerns on this invention. It is explanatory drawing which shows typically the example of an optical communication system to which the optical communication apparatus of the said embodiment example is applied. It is an image figure which shows a signal conversion structure typically. It is an image figure which shows typically the structure which allocates an audio | voice signal to a slot in the other embodiment of an optical communication apparatus. It is explanatory drawing which shows typically the example of an optical communication system using other embodiment examples of an optical communication apparatus.

DESCRIPTION OF SYMBOLS 1 Optical communication apparatus 2 Optical fiber for communication 3 1st media converter 4 2nd media converter 5, 5a, 5b Optical signal transmission / reception part 6, 6a, 6b Electrical signal transmission part 7, 7a, 7b Electrical signal reception part 8, 8a, 8b PS conversion circuit 9, 9a, 9b SP conversion circuit 10 Electrical circuit 11, 12 Optical fiber connection section 16, 17 Voice block total Gr synthesis circuit 18 First extraction circuit 19 Second extraction circuit 26 First Speech synthesis circuit 27 Second speech synthesis circuit 28 Third speech synthesis circuit 21, 22 Optical connector 32 Microphone 31 Speaker

Claims (8)

Having first and second media converters and an electrical circuit;
Each of the first and second media converters is connected to a communication optical fiber connection unit for bidirectional optical communication of the audio signal as a time division multiplexed optical signal having a plurality of time slots.
The electric circuit includes the first and second media converters, an audio input unit, an audio output unit, and an identification signal for selecting one or a plurality of the time slots in each divided region of the time division multiplexed optical signal. The input operation unit is connected,
The electrical circuit includes
A first audio signal assigned to one or more time slots selected by the identification signal input operation unit is extracted from a time-division audio signal optically received by the first media converter and converted into an electric signal. An extraction circuit of
A first speech synthesis circuit for synthesizing a speech signal of an electrical signal input from the speech input unit to the speech signal extracted by the first extraction circuit;
A first identifier synthesizing circuit that assigns the voice signal synthesized by the first voice synthesizing circuit to one or a plurality of time slots selected by the identification signal input operation unit;
Wherein by combining the signals except the audio signal extracted by said first extracting circuit from the time division speech signal by the first identifier combining circuit to the Times Lock audio signals assigned to preparative second medium A first data block synthesis circuit to be sent to the converter side;
A second audio signal assigned to one or more time slots selected by the identification signal input operation unit is extracted from a time-division audio signal optically received and converted into an electric signal by the second media converter. An extraction circuit;
A second voice synthesis circuit that synthesizes a voice signal of an electrical signal input from the voice input unit to the voice signal extracted by the second extraction circuit;
A second identifier synthesizing circuit that assigns the voice signal synthesized by the second voice synthesizing circuit to one or a plurality of time slots selected by the identification signal input operation unit;
The first media converter by synthesizing the audio signal assigned to the time slot by the second identifier synthesis circuit and excluding the audio signal extracted from the time-division audio signal by the second extraction circuit. A second data block synthesis circuit to be sent to the side,
An optical communication apparatus, comprising: a third voice synthesis circuit that synthesizes the extracted signals extracted by the first and second extraction circuits and sends the synthesized signals to the voice output unit side.   A plurality of optical communication devices are connected in series via communication optical fibers connected to the first and second media converters to form an optical communication system. 2. An operation unit for selecting and setting a set time slot in association with an identification symbol for identifying the group for each predetermined group among a plurality of optical communication devices forming a communication system. The optical communication device described.   In addition to the setting time slot corresponding to the identification symbol determined corresponding to the identification symbol input by the identification signal input operation unit, a common setting time slot is set for all the optical communication devices forming the optical communication system. Further, when an all-optical transmission / reception selection operation unit for optical transmission / reception selection operation with all the optical communication devices forming the optical communication system is provided, and the optical transmission / reception selection operation of the all-optical transmission / reception selection operation unit is performed The voice signal input from the voice input unit is assigned to all time slots, and the third voice synthesis circuit is configured to send the voice signal assigned to the common set time slot to the voice output unit side. The optical communication device according to claim 2, wherein   An identification symbol distinguishing display unit is provided for displaying the distinction between the identification symbol input by the operation of the identification signal input operation unit and the identification symbol input by the identification signal input operation unit of the optical communication device of another group. 4. The optical communication device according to claim 2, wherein the optical communication device is characterized in that:   A spare optical transmission optical fiber is provided, and connection portions for connecting the communication optical fibers are provided on both ends of the optical transmission optical fiber. The communication optical fibers are connected to the first and second optical fibers. 5. The light according to claim 1, further comprising a skip connection operation unit that is connected to both ends of the optical transmission optical fiber instead of being connected to the second media converter. Telephone device.   6. The optical call according to claim 1, further comprising a reception distinction display unit that distinguishes between optical reception by the first media converter and optical reception by the second media converter. apparatus.   The wavelength of the optical signal transmitted from the optical signal transmission / reception unit of the first media converter and the wavelength of the optical signal transmitted from the optical signal transmission / reception unit of the second media converter are different from each other. The optical communication device according to any one of claims 1 to 6.   A plurality of optical communication devices according to any one of claims 1 to 7 are provided, and an optical signal transmission / reception unit of the first media converter of the first optical communication device is connected via a communication optical fiber. The optical signal transmission / reception unit of the first media converter and the optical signal transmission / reception unit of the second media converter of adjacent optical communication devices so as to connect the optical signal transmission / reception unit of the second media converter of the second optical communication device And an optical communication system characterized by being connected by a communication optical fiber.

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