KR100379456B1 - A Failure Diagnostic Method of Digital TV Translator - Google Patents

Abstract

The present invention relates to a method for diagnosing a failure of a digital TV repeater, which predicts the life of each module of a digital TV repeater in central China in advance so that a failure factor of the equipment can be immediately replaced so that a video signal of the same quality can be supplied at all times. The present invention as described above, in the broadcasting system comprising a plurality of modules and a digital repeater having a control unit for controlling the module, a centralized China capable of wireless communication with the digital repeater, calculates the expected average life of the module, Inputting the calculated average lifespan of each module into the controller, respectively; Counting an expected life time of the module in the controller; Comparing the expected life time of the module counted by the controller with a previously input expected life end alarm time; If the counting time matches the expected end of life alarm time, notifying the central China of the alarm information set using the digital repeater; Since the central China is configured to display the alarm information notified from the digital repeater on the monitor, the life expectancy of the repeater installed in the country is predicted, and it is convenient to secure the appropriate reserve quantity required for the equipment repair and replacement.

Description

A Failure Diagnostic Method of Digital TV Translator

The present invention relates to a method for diagnosing a failure of a digital TV repeater, which enables a broadcasting station to predict the life of each module of the digital TV repeater in advance.

In general, in the case of digital TV broadcasting service nationwide, the broadcasting station outputs the broadcasting signal from the Seoul area, and receives the signal from the transmitting station of each region and transmits the broadcasting signal to the corresponding area. In this case, in order to solve the shadow area of the relevant area, a translator is installed throughout the country to amplify the broadcast signal received from the transmitter and transmit it to the TV listeners in the shadow area, thereby eliminating the blind spot.

There are over a thousand such translators in the country.

By the way, the Translator is duplexed, and if there is an error in the module in operation, the switch is automatically switched to the EBI module to prevent the broadcasting transmission accident. The area where this translator is installed cannot transmit TV broadcasts.

Therefore, in case of using the broadcasting equipment which transmits the video signal such as the conventional digital repeater, the technician who is in charge of the broadcasting equipment is unable to transmit the video signal of good quality due to the failure of the equipment or the failure caused by the variable situation. We only carry out follow-up measures to dispatch or repair or replace equipment.

As a general countermeasure in the case of a conventional TV repeater failure, a method of arbitrarily selecting and arranging broadcast monitor personnel for each region is used. First, a dedicated broadcast monitor agent for broadcasting is assigned to each area, and if a broadcast monitor agent who lives in an area where a repeater is installed watches a TV installed in a home or a company, the quality of the broadcast content being viewed is poor. Inform local stations of abnormal status of translators in the area. Accordingly, it was common to repeat the process of receiving a failure report of a monitor agent and dispatching a technician in charge of a broadcasting equipment to a region where a failure occurred and repairing the failed repeater or replacing it with a new part.

However, in the case of using a digital TV repeater failure diagnosis method based on the failure report of the conventional dedicated monitor personnel, there are the following problems. In other words, the main purpose of supplying broadcast video using a large number of repeaters currently installed in the country was to constantly supply quality video signals. However, if the dedicated monitor personnel check the quality of the video signal at all times, the monitor personnel may be absent due to a variable situation or there may be times when they do not watch the broadcast periodically. There is a limit to this, and accordingly, due to the disadvantage that systematic management for supplying a video signal of a certain quality is neglected, there is a problem that the replacement must be performed after the life of the repeater has expired or failed.

The object of the present invention was devised in view of the above-mentioned problems, and predicts the lifespan of each module of a digital TV repeater in central China in advance so that if the equipment breaks down immediately, it can always supply the same quality video signal. It is to provide a fault diagnosis method of a digital TV repeater.

According to an aspect of the present invention for achieving the above object, in the broadcasting system comprising a digital repeater having a plurality of modules and a control unit for controlling the module, and a centralized China capable of wireless communication with the digital repeater, Calculating an expected life expectancy of the modules, and inputting the calculated average life expectancy of each module to the controller; Counting an expected life time of the module in the controller; Comparing the expected life time of the module counted by the controller with a previously input expected life end alarm time; If the counting time matches the expected end of life alarm time, notifying the central China of the alarm information set using the digital repeater; The central china may be configured to display alarm information notified from the digital repeater on a monitor.

Preferably, the step of calculating the expected average life of the module, the life of the components constituting the module is classified by the factors of the external stress according to the temperature, humidity and the internal stress due to the difference between the current and the voltage supply Use information.

In the counting step, the average lifetime of the module is input to the controller in advance by using a built-in clock, and the combined average life expectancy according to the level of each module is counted.

1 is a block diagram showing each module constituting a digital TV repeater according to the present invention.

Figure 2 is a block diagram for explaining the average life prediction method of the repeater according to the present invention.

Figure 3 is a block diagram for explaining the average life prediction system of the repeater according to the present invention.

Explanation of symbols on the main parts of the drawings

11: Tuner End (Front End) 12: Power Amplifier

13, 22: Controller 14: Exciter

15 Modulator 16 Demodulation

17: Power Supply 21: Module

31: hub 32: central office

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

An object of the present invention is to predict the lifespan of each module of a translator while efficiently managing a translator installed nationwide in central China (for example, the head office of Yeouido TV station).

1 is a block diagram showing each module constituting a digital TV repeater according to the present invention.

Referring to FIG. 1, a translator is a middle end of an antenna and an IF amplifier, and includes a tuner end 11 including an RF amplifier, a local oscillator, a mixer, a channel tuning circuit, and a power amplifier. Power Amplifier (12), Controller (13), Exciter (14) for making the field current required to excite the electrical machine, Modulator (15), Demodulator (16) And a power supply unit 17.

When an error occurs in each module of the translator having such a configuration, each module sends a signal to the controller 13 that the error has occurred, and the controller 13 receives this signal. Replace with a spare module.

The life prediction method of the digital TV repeater in the present invention based on such a configuration will be described.

2 is a block diagram illustrating a method for predicting the average life of a repeater according to the present invention.

Referring to FIG. 2, first, a mean time to failure (hereinafter abbreviated as MTTF) of each module calculated as the sum of the average lifespan of each component constituting the module is calculated.

At this time, the lifespan of each component is determined by the environment in which it is used and the conditions of use (current and voltage). The stress acting from the external environment of the component, such as the ambient temperature, is called the external stress, and the stress applied during the operation of the component, such as the power and voltage required for the operation of the component, is called the internal stress.

These stresses are differentially set to four levels, each of which is determined by the life of each component, and the lifetime of these components determines the average life of each module.

In other words, the external stress according to temperature and humidity is 25 ° C / 60%, which is a proper temperature, to the first level, 45 ° C / 70% to the second level, 65 ° C / 80% to the third level, and 85 ° C / 90% is divided into the fourth level, etc. The internal factors such as current and voltage also apply the same level of current and voltage to the first level, when the current and voltage are supplied. Divide by level to calculate the life of the module given each level.

Then, the average lifetime of each module calculated at four levels is input to the controller 22.

In the controller 22, a precise clock is built-in, and after installing the module, the controller 22 measures the average life of the module using the built-in clock. At this time, the external stress, which is an external environmental factor, is input to the controller 22 using a thermo-hygrometer in a translator, and is selected as one of four levels to be used as an element for calculating average life expectancy. Each module checks the supplied current and voltage state, selects one of four levels of internal stress, and transmits it to the controller 22.

That is, the first level is 00, the second level is 01, the third level is 10, and the fourth level is a 2-bit signal that is transmitted to the controller 22.

In addition, the controller 22 inputs an average lifespan according to the level of each module (for example, the first level is 10 years and the second level is 7 years), and during the time that external stress is applied. (For example, if the third level of external stress lasts for 10 minutes, count the time count as 10 minutes for the third level 7 year lifespan.) And for the time it takes internal stress (for example, If 3 levels last for 10 minutes, the time count is calculated as 10 minutes for level 3, 7 years life. 90% of the time, then send it to central China to let them know when it is time to replace the equipment.

The centralized Chinese 23 displays the current count situation through the monitor. The content displayed on the monitor is shown in the table below.

module Internal stress External stress life span alarm Synthesizer First level 3rd level 80% 95% Power supply First level 3rd level 80% 95% Fan First level 3rd level 80% 95%

As shown in the above table, each module always transmits the strength of the internal stress applied to the current module and the current load state to the controller 22 (S21), and the controller 22 checks the state of the load and calculates a lifetime.

In the above table, 80% of life means that the module has been installed in the repeater and has reached 80% of its life expectancy. The alarm of 95% means that the equipment should be replaced.

In addition, the central China receives an alarm signal notifying the timing of replacement of each module of the translator coming from all over the country (S22), and notifying the control unit 22 of the replacement time of the module in preparation for external stress. Informs the replacement time (S23).

In other words, it is possible to predict in advance when to replace the modules of the translator nationwide, and to know which module of which quantity in the country to replace, so that it is possible to quickly take measures and secure the appropriate number of supplies in advance. You may be doing it.

The controller 22 receives external stress information from a temperature and humidity sensor of a repeater.

The internal stress information is determined according to the amount of current and voltage supplied to each module. The external / internal stress information transmits the level information to the controller as a 2-bit code signal.

The controller 22 counts the internally mounted clock according to the level information transmitted from the module and the temperature / humidity sensor, and sets an alarm time set in advance by the central office (for example, 90% of the average life span). On arrival, the alarm information is sent to central China.

3 is a block diagram for explaining the average life prediction system of the repeater according to the present invention.

Referring to FIG. 3, a central China 32 and a translator nationwide are connected by Ethernet, and alarm information of a translator nationwide is transferred to a hub 31 of the central china 32. It is delivered and monitored in Central China (32).

In Central China (32), it is possible to know in advance when to replace translators installed nationwide, and it is possible to estimate the number of modules expected to be replaced, so that adequate quantity of spare parts can be secured.

On the other hand, a translator is usually installed on a mountaintop. Accordingly, since external environmental factors such as rainfall, temperature variation, earthquake, lightning strike, and strong wind differ depending on the installation region, the theoretical external stress index calculated for the average life expectancy may be different from the actual one.

To compensate for this, centralized China can set external stress information using Ethernet connected to a translator.

Here, to set the external stress, input the external stress information in advance, and divide the external environmental factors such as rainfall, temperature deviation, earthquake, lightning, and strong wind in each region into 4 levels, and then external stress information + α Enter

Therefore, since the average life is the theoretical life, there is a deviation from the actual life of the equipment according to the actual operation. In order to reduce this deviation as much as possible, in Central China, how long did the failure occur after the initial installation of the translator which occurs simultaneously in the country, how did the environment of the installation area differ from the expected value, Collect the fault information such as the difference between the predicted time and the failure rate caused by variables such as climate, environmental change, terrain, natural disaster, etc. in each area, and make a data to set accurate failure forecast for each local situation. shall.

As a result, these factors significantly reduce the deviation between the average life expectancy time and the actual lifespan.

According to the present invention as mentioned above, by improving the limit of the failure status check by the dedicated monitor personnel used as a conventional method for diagnosing the failure of the digital TV repeater, by introducing a method for predicting the average life of the repeater by the broadcasting station in the country Since it is possible to predict the replacement time of the modules of the translator in advance, it is possible to know how much the appropriate number of modules should be replaced in the repeaters all over the country. There is an effect that can be done.

Claims (3)

In the broadcasting system comprising a digital repeater having a plurality of modules and a control unit for controlling the modules, and a centralized China capable of wireless communication with the digital repeater, Calculating an average life expectancy of the module and inputting the calculated average life of each module to the controller; Counting an expected life time of the module in the controller; Comparing the expected life time of the module counted by the controller with a previously input expected life end alarm time; If the counting time matches the expected end of life alarm time, notifying the central China of the alarm information set using the digital repeater; And displaying the alarm information notified by the digital repeater on the monitor by the central china. The method of claim 1, wherein the calculating of the expected average lifespan of the module comprises classifying the lifespan of the components constituting the module by factors of external stress according to temperature and humidity, and internal stress according to a difference between a current and a voltage supply. A fault diagnosis method for a digital TV repeater characterized by using the level information. The digital TV repeater of claim 1, wherein the counting step comprises counting a combination of an average lifespan of the module and an estimated average lifespan according to the level of each module by using a built-in clock. How to diagnose faults.