JP7086486B2 - Common listening device in the building - Google Patents

Description

The present invention relates to an in-building common listening device that transmits a transmission signal or the like from a CATV station in the building.

The "in-building co-listening device" referred to in this specification is installed in a building such as a co-listening device installed in a building such as a building, an apartment house, or an apartment house, and a co-listening device installed in a detached building. It shall be referred to as a common listening device.
FIG. 4 shows an example configuration in which CATV (cable television) is installed in the common listening device in the building.
The in-building common listening device 1100 shown in FIG. 4 is installed in the building, and the downlink CATV signal branched by the bidirectional branch amplification device 1101 inserted in the CATV signal transmission line is tapped off (TAP OFF). It is drawn into the building via 1102 and the protector SB, is input to the first input terminal of the bidirectional amplification device 1105, and the BS-IF or CS-IF signal from the BS / CS antenna 1103 is bidirectionally amplified. It is input to the second input terminal of the device 1105. The three types of signals input to the first input terminal and the second input terminal are each amplified by the bidirectional amplification device 1105, mixed from the output terminal, and output.

The output of the bidirectional amplification device 1105 is supplied to the turnout 1106, and one signal branched in the turnout 1106 is distributed to a plurality by the distributor 1107. This distributed signal is amplified by the bidirectional amplification device 1108, and further distributed to a plurality by the distributor 1109. One distribution output distributed by the distributor 1109 is supplied to a plurality of serially connected series units 1110 to 1115. A terminating resistor 1116 for impedance matching is connected to the terminating of the series unit 1115.
The series units 1110 to 1115 are provided in each room or the like in the house, and a cable connected to a television receiver or the like is connected to the series units 1110 to 1115.

Japanese Unexamined Patent Publication No. 11-4357

In the conventional in-building common listening device 1100, the possible cause when the TV broadcast cannot be viewed on the TV receiver is due to a failure of the bidirectional branch amplification device inserted in the transmission line, or other factors. It was not possible to identify whether it was due to a factor, and it took time and man-hours to recover. Even if it is identified that the cause of not being able to watch TV broadcasts is the loss of power of the bidirectional amplification device, since an overcurrent protection circuit is usually provided in the power supply section of the bidirectional amplification device, a short circuit at a specific location, etc. When an abnormal current flows due to this, the overcurrent protection circuit operates and the power supply is lost, so that all the functions of the bidirectional amplification device are stopped even if the failure occurs only at a specific location. That is, there is a problem that even if a failure occurs only at a specific location, there is no choice but to wait for the restoration of the bidirectional amplification device in a state where all waves are stopped.

Therefore, an object of the present invention is to provide an in-building common listening device capable of continuing power supply monitoring even if power supply is lost.

The in-building common listening device according to the embodiment of the present invention is an in-building common listening device in which an amplification device is provided on a transmission line and a gateway that can be connected to a public communication network. An amplification unit having an amplification unit that amplifies a signal in the frequency band to be transmitted, a switch that can turn on / off the supplied DC power supply, and a communication means that sends a communication signal including an alarm signal to the transmission line. A control unit having a large-capacity capacitor, the amplification unit, and the control unit are supplied with DC power for operation, and the AC power is monitored, and the alarm signal is controlled when the AC power is lost. The communication means of the control unit includes a power supply monitoring unit for sending to the unit and a power supply unit including an overcurrent protection circuit for preventing an overcurrent from flowing, and the communication signal is not used in the transmission line. The communication signal is transmitted to the transmission line using the frequency band, the communication signal is transmitted to the gateway up the transmission line, and the monitoring means connected to the public communication network monitors the power supply in the amplification device. The most important feature is that the gateway sends the alarm signal transmitted by the communication signal to the monitoring means via a public communication network so as to be able to do so.
Further, in the in-building co-listening device of another embodiment of the present invention, a signal including a broadcast signal can be used as a co-listening signal in the building, and an amplification device for amplifying the co-listening signal is provided on the transmission line. In an in-building common listening device provided with a gateway connected to a public communication network, the amplification device amplifies a signal in one frequency band among the signals in a plurality of frequency bands constituting the common listening signal. A control unit having a unit, a plurality of amplification units having a switch capable of turning on / off the supplied DC power supply, a communication means for transmitting a communication signal including an alarm signal to the transmission line, and a large-capacity capacitor. A power supply monitoring unit that supplies DC power for operation to the plurality of amplification units and the control unit, monitors the AC power supply, and sends the alarm signal to the control unit when the AC power supply is lost. The communication means of the control unit includes a power supply unit including an overcurrent protection circuit for preventing an overcurrent from flowing, and the communication means uses a frequency band in which the communication signal is not used in the common listening signal. The communication signal is transmitted to the transmission line, the communication signal is transmitted up the transmission line to the gateway, and the monitoring means connected to the public communication network can monitor the power supply in the amplification device. However, the most important feature is that the alarm signal sent by the communication signal is sent to the monitoring means via a public communication network.

In the above-mentioned in-building common listening device of the present invention, the identification information of the amplification device that has sent the alarm signal is added to the alarm signal, and in the monitoring means that has received the alarm signal, both in the building. The administrator of the listening device is notified by e-mail that the alarm signal has been received.
Further, in the above-mentioned in-building common listening device of the present invention, when the AC power supply is lost, the power for operation is supplied from the large-capacity capacitor to the communication means and the power supply monitoring unit, and the AC power supply is lost. However, the alarm signal is sent from the communication means to the gateway.
Furthermore, in the above-mentioned in-building common listening device of the present invention, when the overcurrent protection circuit operates due to a short mode failure in any of the plurality of amplification units and the DC power supply is lost, the above-mentioned When the control unit and the switch are supplied with power for operation from the large-capacity capacitor and the DC power supply is lost, the control unit supplies the DC power supply to the amplification unit in which the short mode failure occurs. It is controlled to turn off the switch.

In the building common listening device of the present invention, when AC100V is lost, a large-capacity capacitor becomes a power source, an alarm signal is sent from the power supply monitoring unit to the control unit, and in the control unit, the alarm signal is transmitted by a communication signal. Sending to the gateway. Also, although AC100V is not lost, if the overcurrent protection circuit of the power supply unit operates and the DC power supply is lost, the large-capacity capacitor becomes the power supply and the supply of DC power supply to each amplification unit is turned on. The control unit controls the on / off of the DC-SW to be turned off, turns off only the DC-SW of the amplification unit that has a problem in the short mode, and restores the frequency band except for the frequency band assigned to the amplification unit. I'm letting you. As a result, even if a power loss failure occurs in the common listening device in the building, power supply monitoring can be continued, and the failure can be quickly recovered.

It is a figure which shows the structure of the common listening device in a building which is an Example of this invention. It is a functional block diagram which shows the structure of the bidirectional amplification apparatus in the building common hearing apparatus which concerns on this invention. It is a functional block diagram which shows the structure of the power supply monitoring of the bidirectional amplification device in the building common hearing apparatus which concerns on this invention. It is a figure which shows the structure of the conventional common-listening apparatus in a building.

<Example>
FIG. 1 shows the configuration of the in-building common listening device according to the embodiment of the present invention.
The "in-building co-listening device" according to the present invention is installed in a building such as a co-listening device installed in a building such as a building, an apartment house, or an apartment house, and a co-listening device installed in a detached building. It is assumed that a common listening device is included.
The in-building common listening device 1 of the embodiment of the present invention shown in FIG. 1 includes a BS / CS antenna 10 installed on a rooftop or the like, a mixer 12, and a gateway 13, and includes a mixer 15 and a bidirectional amplification device 17. Both the transmission line in which the branch / distributor 18 and the bidirectional amplification device 19 and the branch / distributor 20 are connected in cascade, and the first system in which the bidirectional amplification device 22 and the branch / distributor 23 are connected in cascade. It is composed of a second system in which the gateway amplifier 24 and the branch / distributor 25 are connected in cascade. The transmission signal transmitted on the transmission line is attenuated by transmission line loss, distribution, or branching, and bidirectional amplification devices 17, 19, 22, and 24 are provided to compensate for this attenuation.
The common listening device 1 in the building includes a branch / distribution device inserted into the transmission line of a CATV signal from the CATV station 1010 via a trunk line device 1011 such as an amplification device or a branch / distribution device installed on the trunk line. The downlink signal of the CATV signal branched by the above (hereinafter referred to as “CATV downlink signal”) is drawn into the building via the TAP OFF 1012 and the protector 1013. The CATV station 1010 is responsible for the maintenance up to the protector 1013, but the subscriber is responsible for the maintenance after the protector 1013.

In the building common listening device 1, a satellite broadcast signal received by the BS / CS antenna 10 at the first input terminal of the mixer 12 to which the gateway 13 is connected to the second input terminal and used as an intermediate frequency signal (hereinafter, """BS / CS-IF signal") is input, and the output terminal of the mixer 12 is connected to the second input terminal of the mixer 15. The CATV downlink signal input to the building common listening device 1 is input to the first input terminal of the mixer 15, and is input to the CATV downlink signal and the second input terminal input to the first input terminal of the mixer 15. The BS / CS-IF signals are mixed to form a common listening signal and output from the output terminal.
In the in-building common listening device 1 shown in FIG. 1, the CATV downlink signal and the BS / CS-IF signal are mixed to form a common listening signal, but the present invention is not limited to this. A UHF antenna for receiving the terrestrial digital broadcast signal may be provided in the building common listening device 1, and the terrestrial digital broadcast signal received by the UHF antenna and the BS / CS-IF signal may be mixed to form a common listening signal.

The common listening signal output from the output terminal of the mixer 15 is input to the bidirectional amplification device 17 and amplified so as to reach a predetermined level. The output of the bidirectional amplification device 17 is supplied to the branch / distributor 18, and is branched / distributed in a plurality of branches / distributor 18. The sympathetic signal that has passed through the branch / distributor 18 is input to the bidirectional amplification device 19 and amplified so as to reach a predetermined level. The output of the bidirectional amplification device 19 is supplied to the branch / distributor 20, and is branched / distributed in a plurality of branches / distributor 20. The common listening signal that has passed through the branch / distributor 20 is further distributed by the branch / distributor 21 to the common listening signals of the first system and the second system. The common listening signal distributed to the first system is input to the bidirectional amplification device 22 and amplified to a predetermined level, and the output of the bidirectional amplification device 22 is supplied to the branch / distributor 23 to a plurality. Branched and distributed. The common listening signal branched / distributed by the branch / distributor 23 is supplied to the series unit provided in each room or the like in the house, and the cable connected to the television receiver or the like is connected to the series unit. .. Further, the common listening signal distributed to the second system is input to the bidirectional amplification device 24 and amplified to a predetermined level, and the output of the bidirectional amplification device 24 is supplied to the branch / distributor 25. It is branched and distributed to multiple. The common listening signal branched / distributed by the branch / distributor 25 is supplied to the series unit provided in each room or the like in the house, and the cable connected to the television receiver or the like is connected to the series unit. ..

Further, the uplink signal transmitted from the series unit of the first system is amplified to a predetermined level by the bidirectional amplification device 22 via the branch / distributor 23, and is supplied to the branch / distributor 21. Further, the uplink signal transmitted from the series unit of the second system is amplified to a predetermined level by the bidirectional amplification device 24 via the branch / distributor 25, and is supplied to the branch / distributor 21. The upstream signal output from the branch / distributor 21 goes up in the path of the branch / distributor 20-bidirectional amplification device 19-branch / distributor 18-bidirectional amplification device 17, and passes through the mixer 15. It is input to the protector 1013. The upstream signal that has passed through the protector 1013 goes up to the CATV station 1010 via the tap-off 1012, the main line of the CATV, and the main line device 1011 and is received.

As described above, the common listening signal is composed of a CATV downlink signal, an uplink signal of the CATV signal (hereinafter referred to as “CATV uplink signal”), and a BS / CS-IF signal, and is a bidirectional amplification device 17, 19, 22, Reference numeral 24 denotes an amplification unit that amplifies the CATV downlink signal, an amplification unit that amplifies the CATV uplink signal, and an amplification unit that amplifies the BS / CS-IF signal. The operation data including the state information of the equipment such as the supply voltage, the supply current and the temperature of each amplification unit, and the state information of the transmission signal such as the input level, the output level and the C / N is periodically monitored. The monitored monitor signal is configured by adding unique identification information (hereinafter referred to as "ID") peculiar to the monitored amplification unit to the operation data, and the monitor signal is modulated and used in the co-listening signal. It becomes a communication signal in a frequency band (for example, 920 MHz) that does not exist, goes up the main line in the common listening device 1 in the building, and is supplied to the gateway 13 via the mixer 15 and the mixer 12. For example, the communication signal is an FSK (frequency shift keying) signal. The gateway 13 has a function of transmitting and receiving data between the common listening device 1 in the building and the Internet 14, and returns the communication signal to a monitor signal which is a baseband signal to perform TCP (Transmission Control Protocol) or HTTPS. (Hypertext Transfer Protocol Secure) allows the monitor signal to be sent to the cloud 3 on the Internet 14. The monitor signal is stored in the cloud 3. The gateway 13 sends a monitor signal to the cloud 3 at predetermined time intervals, and sends a monitor signal to the cloud 3 every time the monitor signal is updated.

The gateway 13 is connected to the Internet 14 wirelessly, for example, by a mobile phone network or Wi-Fi, but may be connected to the Internet 14 by wire. The monitoring center 2 is connected to the Internet 14 by wire or wirelessly. As a result, the monitoring center 2 can monitor the monitor signal graphed by ID by the application on the cloud 3 on the display by accessing the cloud 3. In the ID, each amplification unit of the bidirectional amplification devices 17, 19, 22, and 24 can be identified, and an input level adjustment unit for adjusting the input level of each amplifier in the amplification unit and an output level adjustment unit for adjusting the output level are provided. Each can be identified. Further, when the monitor signal is analyzed by the application on the cloud 3 and there is an abnormality in the monitor signal, the abnormality information can be displayed on the display and monitored. If there is a sign that a malfunction will occur in any of the amplification units due to the abnormality information, personnel will be dispatched to the building where the in-building co-listening device 1 that has the amplification unit is installed and the relevant amplification unit will be dispatched in advance. The amplification unit can be replaced, and the occurrence of failure can be prevented. As a result, the monitoring center 2 can periodically monitor each of the amplification units 17, 19, 22, and 24 in the common listening device 1 in the building. Further, in addition to the monitor signal, the gateway 13 also sends the parameter information set in each amplification unit of the bidirectional amplification devices 17, 19, 22, and 24 to the cloud 3, and the monitoring center 2 stores the information in the cloud 3. By changing the changed parameters, the changed parameters can be set in the amplification unit via the Internet 14 and the gateway 13. The above ID is added to the parameter, and it is a parameter set in the amplification unit so as to output a signal in the assigned frequency band at a predetermined level.

Furthermore, in the in-building common listening device 1 according to the present invention, the bidirectional amplification devices 17, 19, 22, 24 are monitoring the power supply, and the power supply of the bidirectional amplification devices 17, 19, 22, 24 is lost. However, the power supply can be monitored for a predetermined time by using a large-capacity capacitor such as a built-in super capacitor. When it is detected that the power supply of the bidirectional amplification devices 17, 19, 22, and 24 has been lost, the supercapacitor is used as the power supply, and the alarm signal indicating that the power supply has been lost is transmitted by the above-mentioned communication signal. It is sending to gateway 13. The ID of the bidirectional amplification device whose power supply has been lost is added to the alarm signal. In the gateway 13, the alarm signal is sent to the cloud 3 as described above, and in the cloud 3, when the alarm signal is received, the application is started and specified by the ID among the bidirectional amplification devices 17, 19, 22, and 24. The loss of power in the bidirectional amplification device is e-mailed to the administrator of the co-listening device 1 in the building.

Next, the configuration of the bidirectional amplification devices 17, 19, 22, and 24 in the in-building common listening device 1 according to the present invention will be described, but the bidirectional amplification devices 19, 22, and 24 have the same configuration as the bidirectional amplification device 17. Therefore, FIG. 2 shows a functional block diagram showing the configuration of the bidirectional amplification device 17 as a representative.
As shown in FIG. 2, the bidirectional amplification device 17 supplies power to the control unit 51, the first amplification unit 52, the second amplification unit 53, the third amplification unit 54, the fourth amplification unit 55, and these units. It includes a power supply unit 56. For example, the first amplification unit 52 is an amplification unit that amplifies the CATV uplink signal, the second amplification unit 53 is an amplification unit that amplifies the CATV downlink signal, and the third amplification unit 54 amplifies the BS / CS-IF signal. The fourth amplification unit 55 is an amplification unit that amplifies signals in the frequency band excluding CATV uplink, CATV downlink, and BS / CS-IF.

As shown in FIG. 2, the control unit 51 in the bidirectional amplification device 17 includes a microcontroller (MCU) (not shown), a communication unit 51-1 having a GPIO (General Purpose Input / Output) 51a and a communication I / F 51c. It is provided with at least a large-capacity capacitor 51b such as a super capacitor. The first amplification unit 52 includes at least an amplification unit (AMP) 52a and a switch of DC-SW52b, and the second amplification unit 53 also includes at least a switch of AMP53a and DC-SW53b, and the third amplification unit 54. Also has at least a switch of AMP54a and DC-SW54b, and the fourth amplification unit 55 also has at least a switch of AMP55a and DC-SW55b. The DC-SW52b to DC-SW55b are electronic switches that can be switched on / off by an on / off control signal, and the DC power supply supplied to the amplification unit provided with the electronic switch is turned on by the control signal. / Can be turned off.

The power supply unit 56 includes a power supply monitoring unit 56a and an overcurrent protection circuit 56b in addition to a power supply unit that supplies DC power to the first amplification unit 52 to the fourth amplification unit 55. In order to supply DC power, a power supply line DC is provided between the power supply unit of the power supply unit 56, the control unit 51, and the DC-SW52b to DC-SW55b of the first amplification unit 52 to the fourth amplification unit 55, respectively. It is provided. Then, a DC power supply for operation is supplied from the power supply unit of the power supply unit 56 to the control unit 51 via the power supply line DC, and the first amplification unit 52 is supplied via the power supply line DC and DC-SW52b to DC-SW55b. Alternatively, a DC power supply for operation is supplied to each of the fourth amplification units 55. An AC cord provided with a plug at the tip for receiving AC100V from a commercial power supply is pulled out from the power supply unit 56.

In the control unit 51, the GPIO51a includes a power supply monitoring unit 56a and an IO terminal connected to each of the control terminals of the DC-SW52b to the DC-SW55b. Further, the communication unit 51-1 having the GPIO 51a of the control unit 51 and the communication I / F 51c operates for a predetermined time after the power loss because the power is supplied from the large-capacity capacitor 51b even if the power is lost. Can be made to. Further, the power supply line drawn from the large-capacity capacitor 51b is connected to the power supply monitoring unit 56a of the power supply unit 56 and the DC-SW52b to DC-SW55b, respectively, and even if the power supply is lost, the power supply is supplied from the large-capacity capacitor 51b. Since it is supplied, the power supply monitoring unit 56a and the DC-SW52b to DC-SW55b can be operated for a predetermined time after the power loss.

Here, in any of the bidirectional amplification devices 17, 19, 22, and 24, if the AC100V supplied from the power supply unit 56 is lost for some reason, the DC power supply supplied from the power supply unit 56 is lost, and the communication unit 51 is lost. The control unit 51 other than -1 and the first amplification unit 52 to the fourth amplification unit 55 do not operate. However, DC from the large-capacity capacitor 51b to the communication unit 51-1 of the control unit 51, the power supply monitoring unit 56a of the power supply unit 56, and the DC-SW52b to DC-SW55b of the first amplification unit 52 to the fourth amplification unit 55. Powered on, these continue to operate.

The power supply monitoring unit 56a has detected whether or not the AC100V has been lost, and when it is detected that the AC100V has been lost, an alarm signal indicating that effect is sent from the power supply monitoring unit 56a to the control unit 51. In the control unit 51, the communication unit 51-1 receives the alarm signal via the GPIO 51a and creates the above-mentioned communication signal of the alarm signal indicating that the power is lost, and this communication signal is transmitted to the gateway 13 by the communication I / F 51c. Be done. The gateway 13 sends an alarm signal in the received communication signal to the cloud 3. The ID of the bidirectional amplification device in which AC100V is lost is added to the alarm signal. Based on this alarm signal, as described above, the administrator of the co-listening device 1 in the building is notified by e-mail from the cloud 3 that AC100V has been lost in the bidirectional amplification device specified by the ID. As a result, if the administrator knows that the AC100V has been lost and the power is cut off, the administrator can quickly instruct the recovery method without investigating on-site.

Further, the overcurrent protection circuit 56b is a circuit that operates when an overcurrent flows to prevent the overcurrent from flowing. Here, in any of the bidirectional amplification devices 17, 19, 22, and 24, if a short-mode failure occurs in any of the built-in amplification units, an overcurrent flows in the power supply unit 56, so that the power supply unit 56 The overcurrent protection circuit 56b operates. As a result, in the bidirectional amplification device in which the problem occurs, the DC power supplied from the power supply unit 56 is not supplied to the control unit 51 and the first amplification unit 52 to the fourth amplification unit 55. Then, the control unit 51 and the first amplification unit 52 to the fourth amplification unit 55 do not operate, but the power supply of the communication unit 51-1 of the control unit 51 and the power supply unit 56 from the large-capacity capacitor 51b. DC power is supplied to the monitoring unit 56a and the DC-SW52b to DC-SW55b of the first amplification unit 52 to the fourth amplification unit 55, and these continue to operate.

The power supply monitoring unit 56a detects whether or not the AC100V has been lost as described above. In this case, since the AC100V is continuously supplied, the power supply monitoring unit 56a sends an alarm signal. Not done. As described above, the GPIO51a of the communication unit 51-1 does not receive the alarm signal, but when the DC power supply is not supplied, in the control unit 51, the communication unit 51-1 of the communication unit 51-1 of the DC-SW52b to DC-SW55b via the GPIO51a. An off signal is sent to the control terminal to turn off DC-SW52b to DC-SW55b. As a result, the overcurrent does not flow, so that the overcurrent protection circuit 56b is restored to the original state and DC power is supplied from the power supply unit 56. Next, the communication unit 51-1 sequentially sends an on signal to the control terminals of DC-SW52b to DC-SW55b, and sequentially turns on DC-SW52b to DC-SW55b. Then, when the DC-SW of the amplification unit having a problem in the short mode is turned on, the overcurrent protection circuit 56b will operate again. In response to this, the communication unit 51-1 turns off the DC-SW that was turned on when the overcurrent protection circuit 56b was operated again. As a result, the amplification unit having a problem in the short mode is disconnected from the power supply unit 56, the overcurrent protection circuit 56b is restored to the original state, and DC power is supplied from the power supply unit 56. Then, the communication unit 51-1 sends an on signal to DC-SW52b to DC-SW55b via GPIO51a to the amplification unit excluding the amplification unit in which the problem occurs in the short mode, and the amplification unit in which the problem occurs in the short mode. Operate the amplification unit except. As a result, the common listening device 1 in the building recovers from all the stopped waves except for the frequency band assigned to the amplification unit in which the defect occurs in the short mode.

Here, a functional block diagram showing a configuration of power supply monitoring of the bidirectional amplification device in the in-building common listening device 1 according to the present invention is shown in FIG. 3, and power supply monitoring of the bidirectional amplification device will be described with reference to FIG. .. The power supply monitoring configuration shown in FIG. 3 is provided in each of the bidirectional amplification devices 17, 19, 22, and 24.
The power supply monitoring of the bidirectional amplification device is performed by the control unit 51 and the power supply unit 56. The power supply unit 56 includes a power supply monitoring unit 56a, and the power supply monitoring unit 56a includes an isolator 110 that captures a voltage level of AC100V and a threshold circuit 111 having a hysteresis characteristic such as a Schmitt trigger. The two input (IN) terminals of the isolator 110 have an input from one line of AC100V via the resistor R1 and an input from the other line of AC100V via the series circuit of the resistor R2 and the diode D1 for detection. It has been entered. Further, the isolator 110 includes an OUT terminal that outputs a level signal corresponding to a voltage level between two lines of AC100V, a GND terminal connected to the ground, and a power supply (Vcc) terminal. The threshold circuit 111 has an IN terminal, a GND terminal, and a Vcc terminal into which a level signal from the isolator 110 is input, and an OUT terminal that outputs a high (H) signal or low (L) signal alarm signal AL according to the level signal. It is equipped with. DC power is supplied from the power supply unit 56 to the Vcc terminal of the power supply unit 56, and DC power is supplied to the isolator 110 and the Vcc terminal of the threshold circuit 111 via the diode D2 for preventing backflow. As a result, when AC100V is applied to the power supply unit 56, a rectangular wave of 50 Hz or 60 Hz corresponding to the level of the DC power supply is output from the OUT terminal from the isolator 110 and input to the IN terminal of the threshold circuit 111. In response to this, the threshold circuit 111 outputs an H signal from the OUT terminal. When the AC100V is lost, a low level signal corresponding to the L signal is output from the isolator 110 from the OUT terminal and input to the IN terminal of the threshold circuit 111. In response to this, the threshold circuit 111 outputs an L signal from the OUT terminal. When the H signal or L signal output from the OUT terminal of the threshold circuit 111 is an alarm signal AL and the alarm signal AL is an H signal, it indicates a normal time, and when the alarm signal is an L signal, it indicates an abnormal time when AC100V is lost. Will be shown. Since the threshold circuit 111 has a hysteresis characteristic, chattering does not occur in the H signal and the L signal.

The control unit 51 includes an MCU 100, a communication unit 51-1 having a GPIO 51a and a communication I / F 51c, and a large-capacity capacitor 51b such as a super capacitor. The MCU 100 includes a GND terminal and a Vcc terminal, and controls the communication unit 51-1. Further, the communication unit 51-1 has a built-in power-saving type MCU51d, and the MCU51d turns on / off DC-SW52b to DC-SW55b when DC power is no longer supplied from the power supply unit 56. As described above, the on / off signal is controlled to be transmitted via the GPIO51a so as to perform the control.
The alarm signal AL from the power supply monitoring unit 56a is input to the communication unit 51-1 via the GPIO51a. The communication unit 51-1 creates the above-mentioned communication signal including the alarm signal AL under the control of the MCU 51d, and sends it from the communication I / F 51c to the gateway 13. The ID of the bidirectional amplification device is added to the alarm signal AL. The gateway 13 sends an alarm signal AL to the cloud 3, but when the alarm signal AL is regarded as an L signal and the AC100V is lost, the cloud 3 in the building receives the alarm signal AL. The administrator of the listening device 1 is notified by e-mail that AC100V has been lost in the bidirectional amplification device specified by the ID of the alarm signal AL. As a result, the administrator can know that the AC100V has been lost, and can quickly instruct the recovery method without investigating on-site. Further, the cloud 3 that has received the alarm signal AL does not notify the administrator of the e-mail when the alarm signal AL is an H signal and the AC100V is an alarm signal AL indicating normality.

The MCU 100 is supplied with the DC power supply supplied from the power supply unit 56 to the Vcc terminal of the control unit 51, and the GPIO51a and the communication I / F 51c are supplied with the DC power supply supplied from the power supply unit 56 to the Vcc terminal of the control unit 51. , It is supplied via the backflow prevention diode D3. Further, the DC power supplied from the power supply unit 56 to the Vcc terminal of the control unit 51 is applied to the large-capacity capacitor 51b via a parallel circuit of the diode D3, the constant current diode CD1 and the resistor R3 to be charged. There is. The MCU 100 is based on device status information such as supply voltage, supply current and temperature in each of the first amplification unit 52 to the fourth amplification unit 55, and transmission signal status information such as input level, output level and C / N. The operation data is processed to generate the above-mentioned communication signal. Therefore, the power consumption of the MCU 100 is large. Therefore, when the DC power supply is stopped, it becomes difficult to operate the MCU 100 by the large-capacity capacitor 51b. Therefore, when the DC power supply is stopped, the diode D3 prevents the power from being supplied from the large-capacity capacitor 51b to the Vcc terminal of the control unit 51.
When the AC100V applied to the power supply unit 56 is normal and the overcurrent protection circuit 56b is not performing protection operation, the MCU 100 and the communication unit 51-1 are operating normally, and the large-capacity capacitor 51b is in a fully charged state. It has become. Then, when AC100V is lost, or when an overcurrent flows and the overcurrent protection circuit 56b is performing a protection operation, the DC power supply from the power supply unit 56 is lost, but the diode D4 is lost from the large capacity capacitor 51b. Power is supplied to the communication unit 51-1 having the communication I / F 51c and the GPIO 51a in the control unit 51, the isolator 110 of the power supply unit 56, and the threshold circuit 111, and these continue to operate. ..

As a result, power supply monitoring is performed in the bidirectional amplification device as described above. That is, when AC100V is lost, the large-capacity capacitor 51b becomes a power source, a significant alarm signal AL is sent from the power supply monitoring unit 56a to the control unit 51, and the control unit 51 continues to operate. Unit 51-1 sends a significant alarm signal to the gateway 13 as a communication signal. The gateway 13 sends the received significant alarm signal to the cloud 3, and the cloud 3 notifies the administrator by e-mail that AC100V has been lost in the bidirectional amplification device specified by the ID of the alarm signal.
Further, although AC100V is not lost, when the overcurrent protection circuit 56b of the power supply unit 56 operates and the DC power supply is lost, the large capacity capacitor 51b becomes the power supply and the DC power supply to each amplification unit is supplied. The MCU51d of the communication unit 51-1 that continues to operate controls the on / off of the DC-SW that turns the supply on / off, and turns off only the DC-SW of the amplification unit that has a problem in the short mode. Then, the frequency band assigned to the amplification unit in which the problem occurred in the short mode is excluded and restored.

In the in-building co-listening device according to the embodiment of the present invention, it has been explained that the CATV downlink signal is input to the in-building co-listening device, but a signal obtained by mixing the CATV signal and the BS / CS-IF signal is input. You may. In addition, although it was explained that the gateway is sent to the cloud, the cloud may be omitted and the monitoring information and parameter information may be sent directly to the monitoring center.
The communication I / F 51c in the in-building co-listening device 1 of the embodiment of the present invention corresponds to the communication means, and the monitoring center 2 and the cloud 3 correspond to the monitoring means.
Further, in the in-building common listening device according to the present invention, the common listening signal is a signal obtained by mixing a CATV downlink signal and a satellite broadcasting signal, a signal obtained by mixing a terrestrial digital broadcasting signal and a satellite broadcasting signal, and an FM broadcasting signal. Can be a mixed signal, and is a signal including at least a broadcast signal.
The "in-building co-listening device" according to the present invention is installed in a building such as a co-listening device installed in a building such as a building, an apartment house, or an apartment house, and a co-listening device installed in a detached building. However, the number of bidirectional amplification devices and branch / distributors is not limited to the number described above, and can be any number according to the scale and equipment in the building.

1 In-building common listening device, 2 Monitoring center, 3 Cloud, 10 BS / CS antenna, 12 mixer, 13 gateway, 14 Internet, 15 mixer, 17 bidirectional amplifier, 18 distributor, 19 bidirectional amplifier, 20 distributor, 21 distributor, 22 bidirectional amplifier, 23 distributor, 24 bidirectional amplifier, 25 distributor, 51 control unit, 51-1 communication unit, 51a GPIO, 51b large capacity capacitor, 51c I / F Communication, 52 1st amplification unit, 53 2nd amplification unit, 54 3rd amplification unit, 55 4th amplification unit, 56 power supply unit, 56a power supply monitoring unit, 56b overcurrent protection circuit, 110 isolator, 111 threshold circuit, 1110 ~ 1115 Series unit, 1116 Termination resistor, 1010 CATV station, 1011 trunk line equipment, 1012 tap-off, 1013 protector, 110 isolator, 1100 building common listening device, 1101 bidirectional branch amplifier, 1103 BS / CS antenna, 1105 bidirectional amplification. Equipment, 1106 Brancher, 1107 Distributor, 1108 Bidirectional Amplifier, 1109 Distributor

Claims (5)

In a building common listening device equipped with an amplification device on the transmission line and a gateway that can be connected to a public communication network.
The amplification device is
An amplification unit having an amplification unit that amplifies a signal in the frequency band transmitted on the transmission line and a switch that can turn on / off the supplied DC power supply.
A communication means for transmitting a communication signal including an alarm signal to the transmission line, a control unit having a large-capacity capacitor, and a control unit.
A power supply monitoring unit that supplies DC power for operation to the amplification unit and the control unit, monitors the AC power supply, and sends the alarm signal to the control unit when the AC power supply is lost, and an overcurrent. A power supply unit with an overcurrent protection circuit to prevent the flow of
Equipped with
The communication means of the control unit transmits the communication signal to the transmission line using a frequency band not used in the transmission line, and the communication signal is transmitted up the transmission line to the gateway. The gateway sends the alarm signal transmitted by the communication signal to the monitoring means via the public communication network so that the monitoring means connected to the public communication network can monitor the power supply in the amplification device. An in-building common listening device characterized by sending. A signal including a broadcast signal can be used as a common listening signal in the building, an amplification device for amplifying the common listening signal is provided on the transmission line, and a gateway for connecting to a public communication network is provided. In
The amplification device is
A plurality of amplification units having an amplification unit for amplifying a signal in one frequency band among the signals in the plurality of frequency bands constituting the common listening signal, and a switch capable of turning on / off the supplied DC power supply.
A communication means for transmitting a communication signal including an alarm signal to the transmission line, a control unit having a large-capacity capacitor, and a control unit.
A power supply monitoring unit that supplies DC power for operation to the plurality of amplification units and the control unit, monitors the AC power supply, and sends the alarm signal to the control unit when the AC power supply is lost. A power supply unit equipped with an overcurrent protection circuit that prevents overcurrent from flowing, and
Equipped with
The communication means of the control unit transmits the communication signal to the transmission line using a frequency band not used in the common listening signal, and the communication signal goes up the transmission line to the gateway. The monitoring means that the gateway transmits the alarm signal transmitted by the communication signal via the public communication network so that the monitoring means transmitted and connected to the public communication network can monitor the power supply in the amplification device. A common listening device in the building, which is characterized by sending to. The identification information of the amplification device that sent the alarm signal is added to the alarm signal, and the monitoring means that received the alarm signal received the alarm signal to the manager of the co-listening device in the building. The in-building co-listening device according to claim 1 or 2, wherein the signal is notified by e-mail. When the AC power supply is lost, power for operation is supplied from the large-capacity capacitor to the communication means and the power supply monitoring unit, and even if the AC power supply is lost, the alarm signal is sent from the communication means to the gateway. The in-building common listening device according to any one of claims 1 to 3, wherein the device is transmitted. When a short-mode failure occurs in any of the plurality of amplification units and the overcurrent protection circuit operates and the DC power supply is lost, the power supply for operation is supplied from the large-capacity capacitor to the control unit and the switch. Is supplied, and when the DC power supply is lost, the control unit controls to turn off the switch supplying the DC power supply to the amplification unit in which the short mode failure occurs. The in-building common listening device according to any one of claims 1 to 3.

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