JPH0414327A - Concentrated monitoring system for bidirectional catv transmission network - Google Patents

Abstract

PURPOSE:To correct the operation of a faulty amplifier automatically by sending an abnormality correcting data from this concentrated monitoring device in response to the sate data discrimination state of the amplifier in the concentrated monitoring device. CONSTITUTION:The operating state of an amplifier 11a is measured by the detection circuit of a detector 12a, a CPU 22 processes the measured value into processed information and is sent to the concentrated monitoring device 13 as incoming signals x1, x2 through a CPU 22, a modulation circuit 23 and a bidirectional filter 24. The concentrated monitoring device 13 discriminates the state information of the amplifier 11a. An alarm is displayed on a display device 14 in the abnormal operating state and the monitoring device 13 sends the abnormality correction data to the CPU 22 of the detector 12a as outgoing signals y1-y3. The CPU 22 issues the correcting command signal to an adjustment circuit 31 to adjust the amplifier 11a into the normal operating state. By this constitution, the abnormal state of the amplifier is corrected quickly and automatically and the manager implements the maintenance and inspection of the CATV transmission network in a latch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application]
The present invention relates to a centralized monitoring system for a bidirectional CATV transmission network that monitors the operating status of various transmission equipment in a transmission network.

[Prior Art] Generally, in a two-way CATV transmission network, a centralized monitoring system is utilized as a means for monitoring the status of transmission lines.

Figure 2 shows the configuration of a conventional centralized monitoring system.
In the figure, lla, llb, . . . are amplifier devices, 1
2a, 12b, . . . are the amplifier devices 12a, respectively.
12b, a detection device that detects the operating state of...; 13 is a central monitoring device installed on the administrator side of the CATV transmission network;
14 is a display device for displaying the monitoring status, and 15 is a directional coupler for branching signals from the central monitoring device 13 to the coaxial line 16 as a transmission main line.

That is, each amplifier 11a on the coaxial line 16.

The signal amplification state by the amplifiers 11a, llb, .
a, 12b, . . . and this amplification operation detection signal is transmitted to the central monitoring device 13 as an upstream signal As a result, the display device 14
, each amplifier 11a.

The operating status of 11b, . . . is now displayed.

FIG. 3 shows the internal configuration of the amplifying device 11a and the detecting device 12a in the conventional centralized monitoring system.
1 is a detection circuit that detects the operating state of the amplifier 11a; 2
2 is a CPU circuit that converts the detection result into information, 23 is a double modulation circuit that modulates and outputs the information signal, and 24 is a bidirectional filter that limits the modulated signal to a specific band and outputs it.
25 is a directional coupler that transmits the filter output onto the coaxial line 16.

That is, the detection circuit 21 measures and detects the operating state of the amplifier 11a, such as signal strength, voltage value, current value, switch open/close state, etc., and sends the state detection signal to the CPU.
When sent to the circuit 22, the CPU circuit 22 sends an information signal corresponding to the detection state from the modulation circuit 23 to the central monitoring device 13 through the filter 24 as an upstream signal X l + X 2. Then, the central monitoring device 13 performs arithmetic processing on the status signal of the amplifier 11a obtained from the detection device 12a based on a preset normal value, and determines whether the amplifier 11a is in a normal operating state. Determine. As a result, the display device 14 displays the state determination data of the amplifier device 11a.

[Problems to be Solved by the Invention] However, in the conventional centralized monitoring system described above, the operating state of each amplifier 11a, llb, . . . detected by the detection devices 12a, 12b, .
The state is determined through 3 and displayed on the display device 14.
Since there is only a one-sided flow of status information, if the display device 14 displays a warning about an abnormal state of the amplifier 11a, for example, the administrator of this data transmission network can Go to the installation location of 11a,
It is necessary to correct the abnormal operation, and the disadvantage is that it takes time and manpower to travel to the installation location and perform the correction work.

The present invention has been developed in view of the above-mentioned problems, and even if a warning display is displayed for the amplifier, it is possible to easily perform inspection and maintenance work without having to go to the installation location of the amplifier in an abnormal state. The purpose of the present invention is to provide a centralized monitoring system for a bidirectional CATV transmission network.

[Means for Solving the Problems] That is, the centralized monitoring system for a bidirectional CATV transmission network according to the present invention includes a plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier devices, and a detection device that detects the operating state of the amplifier devices. , a central monitoring device that determines whether the operational state of the amplifying device detected by the detection device is an abnormal state and outputs abnormality correction data of the amplifying device based on preset normal state data; The device is configured to include a display device that displays status determination contents in the central monitoring device, and amplification operation adjustment control means that adjusts and controls the operating state of the amplification device in accordance with the correction data outputted by the central monitoring device. be.

[Function] In other words, abnormality correction data is transmitted from the central monitoring device according to the state data determination status of the amplifier device in the central monitoring device, so that the operation of the amplifier device in an abnormal state can be automatically corrected. become.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows the configuration of a centralized monitoring system for a bidirectional CATV transmission network. In the figure, 11a is an amplifier that amplifies the transmission signal, and 12a is an amplifier that transmits the operating status of the amplifier 11a to the monitoring side. a detection device that performs condition correction processing; 13, a centralized monitoring device that monitors the condition of the transmission line and transmits abnormality correction data based on pre-stored normal condition data; 14, a display device that displays the line condition; 15; .25 is a directional coupler that connects the main line of up and down signals; 16 is a coaxial line as a CATV main line; 21 is a detection circuit that detects the operating state of the amplifier 11H; 22 is a CPU circuit that performs transmission and reception processing of up and down signals; 23 is a double modulation circuit that performs frequency conversion processing of the upper and lower signals, and 24 is a bidirectional filter that performs band limitation of the transmission signal.

An adjustment circuit 31 for correcting the operating state of the amplifier 11a is connected between the CPU circuit 22 and the amplifier 11a in the detection device 12a.

That is, in the centralized monitoring system for a bidirectional CATV transmission network with the above configuration, the operating state of the amplifier 11a is as follows.
When the signal strength, voltage value, or switch open/close state is measured and detected by the detection circuit 21 of the detection device 12a, the detection data is converted into information through the CPU circuit 22, and then sent up through the double modulation circuit 23 and the bidirectional filter 24. It is transmitted to the central monitoring device 13 as a signal X l + x2. Then, the central monitoring device 13 performs arithmetic processing based on the normal state data stored in advance, and determines whether the state data of the amplification device 11a sent from the detection device 12a is abnormal. If the central monitoring device 13 determines that the amplifier device 11a is in an abnormal operating state, a warning is displayed on the display device 14.

Here, when it is determined that the amplification device 11a is in an abnormal operating state, the central monitoring device 13 detects the detection device 12a.
The amplification correction data from the central monitoring device 13 is transmitted by comparing the state data of the amplification device 11a obtained from the above with the normal state data stored in advance, and the amplification correction data from the central monitoring device 13 is transmitted to the downstream signals It is sent as y3 to the CPU circuit 22 of the detection device 12a. Then, the CPU circuit 22 outputs a correction command signal based on the amplification correction data sent from the central monitoring device 13 to the adjustment circuit 31,
The adjustment circuit 31 performs switching of switches and adjustment of signal strength, voltage, etc. in accordance with the modified data for the amplifier 11a. As a result, the operating state of the amplifier 11a is corrected to a normal state.

Therefore, according to the centralized monitoring system for a two-way CATV transmission network having the above configuration, abnormal conditions in the amplifier can be quickly and automatically corrected without wasting time and manpower such as moving to the amplifier or working. CA
The administrator can now perform maintenance and inspection work on the TV transmission network all at once.

[Effects of the Invention] As described above, according to the present invention, there is a plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier devices, and a detection device that detects the operating state of the amplifier device. a central monitoring device that determines whether or not the operating state of the amplifier is in an abnormal state and outputs abnormality correction data of the amplifier based on preset normal state data; and a display that displays the content of the state determination in the central monitoring device. and an amplification operation adjustment control means for adjusting and controlling the operating state of the amplification device in accordance with the corrected data outputted by the central monitoring device, and a device for determining state data of the amplification device in the central monitoring device. Depending on the situation, abnormality correction data is sent from the central monitoring device, and the operation of the amplifier in an abnormal state can be automatically corrected. It becomes possible to automatically perform inspection and maintenance work without having to go to the installation location.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a centralized monitoring system for a bidirectional CATV transmission network according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a conventional centralized monitoring system, and FIG. 3 is a block diagram showing the configuration of a conventional centralized monitoring system. FIG. 2 is a block diagram showing the internal configuration of an amplification device and a detection device in the centralized monitoring system of FIG. 11a...Amplifying device, 12a...Detecting device, 13.
... Central monitoring device, 14... Display device, 15°25.
...Directional coupler, 16...Coaxial line, 21...Detection circuit, 22...CPU circuit, 23...Double modulation circuit, 24...Bidirectional filter, 31...Adjustment circuit . Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier device, and whether the operating state of the amplifier device detected by the detection device is an abnormal state. a central monitoring device that determines whether or not the data is present and outputs abnormality correction data of the amplifier based on preset normal state data; a display device that displays status determination contents of the central monitoring device; and an output from the central monitoring device. A centralized monitoring system for a two-way CATV transmission network, comprising: amplification operation adjustment control means for adjusting and controlling the operating state of the amplification device according to corrected data.