JPH0865653A - Monitoring method for power source of uninterruptible power supply in catv system equipped with uninterruptible power supply - Google Patents

Abstract

PURPOSE: To confirm that the equipmemts of the CATV systems are supplied with the power supply from the stand-by power source of the uninterruptible power supply at the center of the CATV system. CONSTITUTION: The CATV system is equipped with the uninterruptible power supply 1 which supplies the electric power to the equipmemts in case of the stop of the supply of the commercial power source; when the electric power is supplied from the stand-by power source such as a battery of the uninterruptible power supply 1, a monitor device 2 which monitors the power supply state of the uninterruptible power supply 1 generates an alarm signal, which is sent to a subscriber's house 3 nearby the uninterruptible power supply 1 through a weak radio wave or communication line, so that the alarm signal is received by the receiver 4 in the subscriber's house 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CATV system equipped with an uninterruptible power supply, and the power supply for supplying power to various devices of the system, such as an amplifier, is a commercial power supply or a battery of the uninterruptible power supply. The present invention relates to a power supply monitoring method of an uninterruptible power supply device that monitors whether or not it is a standby power supply.

[0002]

2. Description of the Related Art In a general CATV system, an uninterruptible power supply unit A is provided as a power supply for a relay amplifier so that broadcasting is not interrupted even if a commercial power supply (AC100V) goes down (power failure) as shown in FIG. . A battery is normally used as a standby power source for this UPS, and when the commercial power source goes down, it automatically switches to the standby power source, and the power from it is converted to AC by the inverter and supplied to the relay amplifier. It The uninterruptible power supply A is provided with a safety device (breaker) B on the primary side like other electric equipment, and commercial power is supplied through the safety device B.

[0003]

The uninterruptible power supply A
Is automatically switched from the standby power source to the commercial power source when the commercial power source power failure is resolved, even if the commercial power source is switched to the standby power source due to a power failure of the commercial power source. When the breaker B falls, even if the power failure is resolved, the standby power supply does not return to the commercial power supply, and the power is continuously supplied from the standby power supply. The center cannot know whether the uninterruptible power supply A of the CATV system is supplied with standby power or commercial power, so when the broadcast is continued, the power of standby power is exhausted. At this time (battery discharge time: usually after 2 to 4 hours), the broadcasting suddenly stopped, and there was a problem that the subscriber was annoyed.

In order to solve the above problems, an object of the present invention is to allow the center of the CATV system to confirm that the equipment of the CATV system is being supplied with power from the standby power supply of the uninterruptible power supply. To provide a power supply monitoring method.

[0005]

As shown in FIG. 1, a power supply monitoring method for an uninterruptible power supply in a CATV system equipped with an uninterruptible power supply according to the present invention supplies power to a device when commercial power supply is stopped. CA with uninterruptible power supply 1
In the TV system, when power is supplied from a standby power supply such as the battery of the uninterruptible power supply 1, an alarm signal is generated from the monitoring device 2 that monitors the power supply state of the uninterruptible power supply 1.
The alarm signal is transmitted to the subscriber's home 3 near the uninterruptible power supply 1 by a weak radio wave or a communication line, and the alarm signal is received by the receiver 4 of the subscriber's home 3. To do.

[0006]

In the power supply monitoring method for the uninterruptible power supply in the CATV system including the uninterruptible power supply according to the present invention, when the commercial power supply is switched to the standby power supply of the uninterruptible power supply 1, the switching is monitored. An alarm signal is generated from the monitoring device 2, and the alarm signal is transmitted to the subscriber's home 3 near the uninterruptible power supply 1 by a weak radio wave or a communication line, and the alarm signal is received by the receiver 4 of the subscriber's home 3. If this subscriber receives a warning signal in advance, the subscriber is requested to notify the center 10 of the CATV system, and if there is a report from the subscriber to the center 10, an uninterruptible power supply is provided at the center 10. It can be confirmed that the standby power supply of the device 1 is being used. At this time, if there is no abnormality in the commercial power supply, it is possible to know that there is an abnormality on the primary side of the uninterruptible power supply, so a worker goes to the uninterruptible power supply and confirms the abnormality on the primary side of the equipment. The anomaly can be fixed.
Further, in this power supply monitoring method, since the alarm signal is transmitted to the receiver of the subscriber's house 3 by a weak radio wave or a communication line, the license of the wireless station is not required and the implementation is easy.

[0007]

Embodiment 1 FIG. 1 shows a C equipped with an uninterruptible power supply device of the present invention.
1 shows an embodiment of a power supply monitoring method for an uninterruptible power supply in an ATV system, which is a center 1 of CATV.
The broadcast signal sent from 0 is transmitted through the transmission line 11, and the same signal is transmitted to each subscriber home 3 while being amplified by the amplifier 12 connected to the transmission line 11. Further, each amplifier 12 is operated by receiving power supply from the uninterruptible power supply 1.

The uninterruptible power supply 1 is a commercial power supply (AC1
00V) and a backup power supply such as a battery, and the system 1 is normally operated by AC from the breaker 13 on the primary side.
When 100V is supplied, AC100V is dropped as it is or dropped to a desired voltage to supply power to the amplifier 12, and when the power supply from the breaker 13 on the primary side is stopped, the direct current of the standby power supply is automatically requested by the inverter. The voltage is converted into alternating current and power is supplied to the amplifier 11.

Next to the uninterruptible power supply device 1, a monitoring device 2 for determining whether the power supply of the device 1 is a commercial power supply or a standby power supply and monitoring it is installed. The monitoring device 2 is an uninterruptible power supply. It is configured to automatically generate an alarm signal when the power source of the device 1 is switched from the commercial power source to the standby power source. This alarm signal is sent out as a weak radio wave from a low output wireless transmitter (a transmitter that does not require a wireless station license) built in the monitoring device 2 through a small antenna. If the alarm signal is modulated by PCN modulation, FM modulation, AM modulation, or the like and transmitted, the alarm signal becomes less susceptible to interference, and even weak radio waves can be received without error.

The alarm signal by the weak radio wave is received by the receiver 4 of the subscriber's house 3 near the uninterruptible power supply 1. When the receiver 4 receives the weak radio wave (alarm signal), it can notify the person in the subscriber's house 3 by light from an LED or the like, a buzzer sound from a speaker or the like, or a voice synthesizer sound. . Assuming that there are no people on the spot, the warning by light or sound should be continued or intermittently, and the warning signal should be received when the person returns. I am able to know. As soon as the subscriber knows that the alarm signal has been received, he / she informs the CATV center 10 by telephone. And the manager of the center 10 is the uninterruptible power supply 1
The reason why the power source of the power source was switched from the commercial power source to the standby power source was examined, and if necessary, the power was sent to the uninterruptible power supply device 1 and the primary side breaker 13 was returned to normal when it was down, If there is more than this, check the equipment
Perform repairs, etc.

In the present invention, the monitoring device 2 and the subscriber's home 3
The receiver 4 may be connected to the receiver 4 by a wired communication line, and the alarm signal of the monitoring device 2 may be transmitted to the receiver 4 by wire to notify the person at the subscriber's house 4.

[0012]

The CAT provided with the uninterruptible power supply of the present invention
In the power supply monitoring method of the uninterruptible power supply in the V system, when the commercial power supply is switched to the standby power supply of the uninterruptible power supply 1, the subscriber is notified by the receiver 4 of the subscriber's house 3, so that this subscriber By calling the center 10 by telephone or the like, the center 10 can also know that power is being supplied to the devices of the CATV system by the standby power supply of the uninterruptible power supply 1. Therefore, even if the standby power source is not automatically restored to the commercial power source for some reason, it is possible to take measures against the exhaustion of the standby power source and prevent accidents leading to broadcasting stoppage. Further, since the alarm information is transmitted using a weak radio wave or a wired signal which does not require a wireless station license, it is easy to implement.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a power supply monitoring method for an uninterruptible power supply in a CATV system equipped with the uninterruptible power supply according to the present invention.

FIG. 2 is a schematic diagram showing an example of a CATV system including a conventional uninterruptible power supply.

[Explanation of symbols]

 1 uninterruptible power supply 2 monitoring device 3 subscriber's house 4 receiver

Claims (1)

[Claims] 1. A CATV system equipped with an uninterruptible power supply (1) for supplying power to equipment when commercial power supply is stopped, when power is supplied from a standby power supply such as a battery of the uninterruptible power supply (1), An alarm signal is generated from the monitoring device (2) that monitors the power supply state of the uninterruptible power supply (1),
The alarm signal is transmitted to the subscriber's house (3) near the uninterruptible power supply (1) by a weak radio wave or a communication line, and the alarm signal is received by the receiver (4) of the subscriber's house (3). A method of monitoring the power supply of an uninterruptible power supply in a CATV system equipped with the uninterruptible power supply.