JP5204030B2 - Communications system - Google Patents

Description

  The present invention relates to a communication system capable of continuing communication of a minimum broadcast signal for a long time via a network even when a power failure of a commercial AC power supply for supplying operating power occurs.

  There is known a communication system that transmits an audio signal for broadcasting between a broadcast key station and a broadcast station via a dedicated line, a relay station, and the like. For example, as shown in FIG. The broadcast key station 101, the local station 102 provided with the transmission device 112, and the broadcast station 103 provided with the transmission device 113 are connected via the dedicated line network 104, and the broadcast contents from the broadcast key station 101 are designated as dedicated. The digital signal is transmitted to the local station 102 and the broadcasting station 103 via the line 104 so that the local station 102 and the broadcasting station 103 can listen to the audio signal obtained by converting the digital signal into an analog signal by radio waves. In addition, the operation state of the communication system is normal by a monitoring device (OpS) 105 that monitors the communication state of each part including the leased line network 104. Luke to monitor whether or not.

  FIG. 8 shows the main parts of the transmission apparatuses 111 to 113, and the 0-system and 1-system codec sections (CODEC sections) 121-0 and 121-1 for A / D conversion and D / A conversion of the main audio signal. Power is supplied from a fan (FAN) 122-0 for cooling each part of the system 0, a fan (FAN) 122-1 for cooling each part of the system 1, a charging part 123 including a battery, and a commercial AC power source AC. The power supply part 124 which rectifies | straightens the alternating voltage which supplies and supplies the electric power for the battery charge by the operation power supply of each part and the charging part 123, and the monitoring control part 125 which monitors and controls the operation state of each part are shown. Various transmission apparatuses constituting the communication system are generally configured in a duplex configuration according to the importance, and since the broadcasting equipment is also highly important, the codec units 121-0 and 121-1 in the duplex configuration. And the coders 121-0 and 121-1 are provided with fans 122-0 and 122-1 for air cooling. When the commercial AC power supply AC is normal, the operation voltage of each part rectified as a predetermined voltage by the power supply unit 124 is supplied, and the battery is charged by the charging unit 123. 121-0 and 121-1 are both in an operable state and supply operating power from the power supply unit 124, and one of them performs A / D conversion and D / A conversion for transmission of an audio signal as an active system. When the failure of the active system is detected by the monitoring control unit 125, the system is switched to the standby system and has a hot standby configuration for continuing the audio signal transmission process.

  When the operating power of each unit cannot be supplied from the power supply unit 124 due to a failure of the commercial AC power source, the codec units 121-0 and 121-1 and the fan 122-0 are used as the operating voltage of each unit from the battery of the charging unit 123. , 122-1, and the communication operation for transmitting the audio signal for broadcasting can be continued, and the function of the charging unit 123 including such a battery is already various as an uninterruptible power supply. A configuration is proposed. For example, if the commercial AC power supply fails, a method is proposed to detect the remaining capacity of the battery for power backup and to stop the power supply in order from the least important in terms of processing inside the device according to the remaining capacity (For example, refer to Patent Document 1). There has also been proposed a system that includes a battery, a generator, and the like, and that can continue to operate by selectively controlling them when the voltage of the AC power supply drops or when a power failure occurs (see, for example, Patent Document 2).

JP-A-5-107837 JP 2008-237018 A

  When the commercial AC power supply is interrupted for a short time, the charging voltage of the battery of the charging unit 123 can be supplied to the codec units 121-0 and 121-1, and the fans 122-0 and 122-1. is there. However, if the power failure time becomes longer, the remaining charge power of the battery decreases, and it becomes impossible to supply operating power. In such a state, there is a problem that the broadcasting is stopped and the social influence becomes large. Therefore, as shown in the above-mentioned Patent Document 1, the means for selectively controlling the portion where the power supply is stopped according to the copy processing process and completely stopping the power supply when the copy process is completed can always continue the transmission of the audio signal. Therefore, it cannot be applied to the communication system described above. That is, the communication system includes various communication processing stages, but since the communication as the communication system does not end, the technique disclosed in Patent Document 1 cannot be applied. Further, the power failure countermeasure means shown in Patent Document 2 is not based on a duplex configuration, and is also provided with a configuration including a diesel generator. The diesel generator includes a diesel engine and a generator driven thereby. Therefore, it requires a relatively large installation space, and it is necessary to perform inspection and maintenance at all times. There is a problem that the cost is increased and the starting time in which power can be supplied after starting the engine is relatively long.

  The present invention intends to reduce the configuration of a transmission device in response to a power failure state of a commercial AC power source and a backup power source state, and to continue broadcasting communication processing for a long time.

The communication system of the present invention is a communication system that transmits audio signals between transmission apparatuses via a network, and the transmission apparatus performs transmission and reception processing units between the active system and the standby system, and monitors and controls each unit. A supervisory control unit, a fan for the active system and the standby system that cools the transmission / reception processing unit between the active system and the standby system, a power supply unit that supplies operating power to each unit by supplying power from a commercial AC power source, and the power supply unit to charge the battery by the power supply has a configuration including a charging unit for supplying operating power to each unit from the battery during a power failure of the commercial AC power source, the monitoring control unit is sometimes failure detection of the commercial AC power source, other transmission device It is determined whether or not there is a power failure detection information from the mobile station, and is set to level 1 when a power failure is detected only for the own transmission device, level 2 is received when power failure detection information is received from a plurality of transmission devices, and in the case of level 1, the commercial AC Power off Is determined to be a short time, the remaining capacity of the battery is monitored and each unit that supplies power from the battery is selected and controlled. In the case of level 2, it is determined that the power failure of the commercial AC power source is long, Means is provided for performing switching control so that only the active system is in the operating state.

  The communication system of the present invention continues the broadcasting service by supplying power from the battery even when the commercial AC power supply is interrupted, monitors the remaining capacity of the battery, and operates only the active system, for example, in response to the reduction. By setting the state and not supplying power to the standby system, it is possible to extend the power supply possible time from the battery and maintain the broadcasting service. Also, it is determined from the power failure detection information whether the commercial AC power supply has a power outage for a short time or a relatively long time. By supplying power only to the active system in order to reduce the configuration, it is possible to operate for a longer time than when supplying power to the standby system.

It is principal part explanatory drawing of Example 1 of this invention. It is explanatory drawing of the monitoring control part and charging part of Example 1 of this invention. It is explanatory drawing of the power consumption and backup time of Example 1 of this invention. It is a related explanatory drawing of the function and power consumption of each part of Example 1 of the present invention. It is related explanatory drawing of the power consumption reduction of Example 1 of this invention, and operation | movement possible time. It is explanatory drawing of the fault occurrence range and level of commercial alternating current power supply. It is explanatory drawing of an example of a communication system. It is principal part explanatory drawing of the transmission apparatus of a prior art example.

  The communication system according to the present invention is a communication system that transmits audio signals between transmission apparatuses via a network. Referring to FIG. 1, the transmission apparatus 1 is a transmission / reception processing unit between an active system and a standby system. (The codec units 11-0 and 11-1), the monitoring control unit 15 that monitors and controls each unit, and the active and standby fans 12-0 that cool the transmission / reception processing unit between the active system and the standby system , 12-1, a power supply unit 14 that supplies operating power to each unit by power feeding from a commercial AC power source, and a battery (not shown) is charged by power feeding from the power source unit 14. The monitoring control unit 15 is configured to supply power from the battery of the charging unit 13 to each unit when a power failure is detected in the commercial AC power supply. Remaining capacity Monitoring, with the remaining capacity reduction, and a means for performing switching control so that the only one of the operating state of the working system and the standby system.

  FIG. 1 is an explanatory diagram of a first embodiment of the present invention, showing a main part of a transmission device of a broadcast key station constituting a broadcasting communication system, wherein 1 is a broadcast key station, 2 is a transmission device, 3 Is a dedicated line network, 11-0 and 11-1 are codec sections (CODEC sections), 12-0 and 12-1 are fans (FAN), 13 is a charging section including a battery, and 14 is an AC voltage from a commercial AC power source. Is a power supply unit that rectifies and supplies the operating voltage of each unit, 15 is a monitoring control unit that monitors and controls each unit, and 16 is a commercial power receiving unit that receives an AC voltage from a commercial AC power source. The codec units 11-0 and 11-1 constituting the duplexed transmission / reception processing unit are cooled by the duplexed fans 12-0 and 12-1, respectively, and the analog audio signals for broadcasting are converted into the codec units 11-0 and 11-11. -1 and converted into digital signals, respectively, and one of the codec units 11-0 and 11-1 is selected as the active system by a transmission unit (not shown). For example, the selected 0-system codec unit 11 The digital signal converted by -0 is sent to the leased line network 3 and sent to a local station or broadcasting station (not shown). The monitoring control unit 15 monitors the operating state of each unit. For example, when the occurrence of a failure in the 0-system codec unit 11-0 is detected, the digital signal converted by the 1-system codec unit 11-1 is sent to the dedicated line network 3. Switching control is performed so that the data is transmitted. In this case, the codec units 11-0 and 11-1 have a hot standby configuration, and even if the system is switched from the 0 system to the 1 system, no instantaneous interruption occurs. Therefore, the transmission of the digital audio signal can be continued and the broadcasting service is continued. be able to.

  The power supply unit 14 converts the AC voltage from the commercial power supply receiving unit 16 into a DC voltage that is the operating voltage of each unit, and supplies the power supply unit 13 when the commercial AC power supply is normal. The internal battery is charged by the DC voltage from 14. Various known configurations can be applied to the control configuration for charging and discharging the battery. Further, when detecting the occurrence of a power failure in the commercial AC power supply, the monitoring control unit 15 monitors the remaining capacity of the battery of the charging unit 13 and monitors the control of the power supplied from the battery to each unit. The monitoring control unit 15 controls the power supplied from the battery of the charging unit 13 to each unit according to the remaining capacity of the battery and whether or not the power failure is restored in a short time. For the codec and the like, for example, switching control is performed so that power is supplied only to the active system. Although the transmission apparatus 1 is a broadcast key station, the transmission apparatus in a local station or broadcasting station similarly has a duplex configuration of 0 system and 1 system, and has the above-described control function. Yes.

  FIG. 2 shows the main part of the battery monitoring means of the monitoring control unit. When supplying a direct current voltage of −48 V from the charging unit 13 to each unit, the monitoring control unit 15 includes an A / D converter 21 and a memory 22. And a processor (CPU) 23 for controlling each part, the output voltage of the battery is resistance-divided, converted into a digital signal by the A / D converter 21, and stored in the memory 22. In this case, the memory 22 stores the voltage of the battery converted by the A / D converter 21 according to the passage of time, and the battery voltage at the time of the occurrence of the power failure stored in the memory 22 by the detection of the power failure occurrence of the commercial AC power supply, The battery voltage that decreases with the passage of time is compared by the voltage value comparison means (COMP) of the processor 23, and the configuration of each part is reduced in response to the decrease of the battery voltage with the passage of time. Also, immediately before the battery voltage drops and the transmission of the broadcast signal becomes impossible, the broadcasting key station, local station, or broadcasting station where the power failure occurred stops broadcasting due to a power failure according to the control of the monitoring control unit of each transmission device. A means for automatically broadcasting the announcement is provided, and the listener is notified that the broadcast is not suddenly stopped.

  FIG. 3 shows that an example of the battery voltage and the backup possible time varies depending on the power consumption. The vertical axis indicates the battery voltage (V), the horizontal axis indicates the power supply possible time (sec), and the curves a to d. Indicates the relationship between the power consumption and the power supply possible time. The curve a is 88 W, the curve b is 48 W, the curve c is 33 W, and the curve d is 15 W. That is, as the power consumption is reduced, the battery voltage gradually decreases.

  FIG. 4 shows an example of power consumption corresponding to the function and operation state of each part in the transmission apparatus. In normal operation, all functions are in an operation state, power consumption is 88 W, and an air cooling fan. 48W when stopped, 33W when redundant system is stopped (when either one of system 0 or 1 is stopped), 15W when control system is stopped and only the main signal system is operated and broadcasting can be continued. It becomes. The tendency of the reduction of the configuration and the reduction of the power consumption shows the same tendency although the size of the power consumption is different even in the transmission apparatus having a larger size.

  FIG. 5 is an explanatory diagram of extending the operable time due to a power failure of the commercial power supply. FIG. 5A shows, for example, that the power supply of one system in the duplex configuration is stopped and the broadcast is performed by the other system at the time of the power failure of the commercial AC power supply. In the control configuration that transmits the main signal, when the battery voltage drops to the forced operating voltage, the cooling fan also stops, enabling the transmission of broadcast signals as the minimum required operation configuration of the monitoring control unit (B) suppresses the drop in battery voltage so that the broadcast signal can be transmitted up to the estimated recovery time when the recovery time is found during a commercial AC power failure. For example, only one of the 0-system and 1-system duplex configuration in the transmission apparatus is in an operating state, and in this case, the voltage characteristics are shown when the configuration of each unit is degenerated.

  6A shows the arrangement of distributed local stations and broadcasting stations, and FIG. 6B shows the time of occurrence of a power failure of the commercial AC power source and the power failure (AC DWN) of the commercial AC power source of the alarm (ALM) type. ), Regional blocks, broadcast areas, and broadcast stations, as shown in (A), when only a single local station or broadcast station is affected by a commercial AC power outage Level 1 and level 2 when affected by power outages of commercial AC power supplies at multiple local stations or broadcasting stations. In the case of level 1, since the power failure is in a small range, the supervisory control unit determines that the recovery time is short, and the power consumption is slightly reduced by stopping the standby system fan. When it is likely to continue, only the active system is operated to further reduce power consumption. When the power failure continues, only the equipment on the transmission path of the broadcast signal including the active codec unit is set to the operating state. Or, in the case of level 2, since there is a wide range of power outages, the supervisory control unit reduces power consumption by reducing the configuration of the transmission device so that only the minimum configuration capable of maintaining transmission of broadcast signals is operating. It is possible to reduce the operating time by battery charging of the charging unit 13.

DESCRIPTION OF SYMBOLS 1 Broadcasting key station 2 Transmission apparatus 3 Dedicated line network 11-0, 11-1 Codec part (CODEC part)
12-0, 12-1 Fan (FAN)
13 Charging unit including battery 14 Power supply unit 15 Monitoring control unit 16 Commercial power supply unit

Claims (2)

In a communication system that transmits audio signals between transmission devices via a network,
The transmission device includes a transmission / reception processing unit for the active system and the standby system, a monitoring control unit for monitoring and controlling each unit, and an active system and a standby system for cooling the transmission / reception processing unit for the active system and the standby system. A fan, a power supply unit that supplies operating power to each unit by power feeding from a commercial AC power source, and a battery that is charged by power feeding from the power source unit, and supplies operating power from the battery to each unit during a power failure of the commercial AC power source Having a configuration including a charging unit,
The supervisory control unit determines whether or not there is a power failure detection information from another transmission device when a power failure is detected in the commercial AC power supply, and is set to level 1 when a power failure is detected only in the own transmission device. When detecting information is received, the level is set to level 2. In the case of level 1, the commercial AC power supply is determined to have a short power failure, the remaining capacity of the battery is monitored, and each unit that supplies power from the battery is selected and controlled. In the case of level 2, a communication system comprising means for performing switching control so that the commercial AC power supply is judged to be out of power for a long time and only the active system is in an operating state . The communication system according to claim 1, wherein when only the active system is in an operating state, the remaining capacity of the battery is monitored, and power supply to the monitoring control unit is stopped as the remaining capacity is reduced. .

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