KR102141990B1 - Emergency Broadcast Line Checker Circuit Blocker of Subway-Railway Broadcasting Equipment - Google Patents

Abstract

The present invention, in automatic information broadcasting equipment of a subway or railway, provides an emergency broadcast short circuit breaker of subway-railway broadcasting equipment, in which even if one speaker line is short-circuited or disconnected due to aging or a fire in the field where a number of speakers respectively connected to a plurality of speaker lines are operated by one amplifier, except for the speaker connected to the corresponding speaker line, the rest of the speakers operate normally, so that broadcasts in other regions can be broadcast normally, and which detects in real time hardware and selectively blocks a relay of the corresponding layer where a problem occurs before the amplifier is blocked and turns on a fault indication LED for a short-circuited channel and sends an audible alarm out with a buzzer, and provides an automatic recovery function after a set period of time after selectively blocking the shorted channel.

Description

Emergency broadcasting short circuit blocker for subway-rail broadcasting equipment {Emergency Broadcast Line Checker Circuit Blocker of Subway-Railway Broadcasting Equipment}

The present invention relates to an emergency broadcast short circuit blocking of a subway-railway broadcasting facility, and more specifically, a plurality of speakers connected to a plurality of speaker lines by one amplifier in an automatic information broadcasting facility of a subway or railroad are operated. In the event that any one speaker line is short-circuited or disconnected due to aging or fire in the field, the rest of the speakers except for the speaker connected to the speaker line are related to the emergency broadcasting short-circuit blocking device of the subway-railway broadcasting facility. .

In recent years, a lot of fires or explosions have occurred, and in buildings and facilities, emergency telephones for users to inform emergency situations are placed, for example, between 300m. It was used as a means, but there was no function available in an emergency.

The method of broadcasting an emergency situation is achieved by accessing a voice notification system from a remote location and transmitting an emergency situation. In this regard, Korean Patent Publication No. 2006-0023759, which is a prior art, discloses a technology for automatically making a call from a voice communication system to a voice broadcasting system in a region requiring guidance broadcasting, and performing voice broadcasting with a loudspeaker connected to the voice broadcasting system. have.

However, since the twisted pair telephone is installed in a tunnel or a railroad, it is a priority to grasp the corresponding location in case of emergency broadcasts. It is not disclosed. In addition, even though communication between each twisted pair telephone is required, the function of the interphone is not installed, and there is a problem that it cannot be detected when a camera is not installed when a fire occurs in a dark tunnel.

Hereinafter, a subway-rail broadcasting facility according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram illustrating an example of a subway-rail broadcasting facility according to the prior art, and FIG. 2 is a view for explaining a speaker line checker of the subway-rail broadcasting facility shown in FIG. 1 in detail.

As an example of a subway-rail broadcasting facility according to the prior art, as shown in FIG. 1, an amplifier 100, a speaker line checker 200, a terminal terminal 300, a plurality of speakers 401-404 and a main controller It consists of 500.

Here, the amplifier 100 receives an audio broadcast signal to be broadcast through a speaker of a broadcasting facility of a subway or a railway and amplifies it.

The speaker line checker (checker) 200 checks the state (short circuit, disconnection, impedance) of each speaker line through each checker 201 according to periodic or user demands. Then, the check result from each checker 201 is transmitted to the main control device 500.

The terminal terminal 300 is a fuse for protecting the amplifier 100 when a problem such as a fire occurs when the audio broadcast signal of the amplifier 100 is transmitted to the plurality of speakers 401 to 404.

The plurality of speakers 401 to 404 are a plurality of speakers installed in a subway or railway station.

In the main controller 500, the audio broadcasting signal of one single amplifier 100 is connected to the speaker line checker 200 through the relay connection, and one of the speakers 1 to 4 in any region or the speakers 1 to 4 in all regions is selected. It is controlled so that it can be broadcast.

According to this configuration, the audio broadcasting signal of one single amplifier 100 is connected to any region (one of speakers 1, 2, 3, 4) or all regions (speakers 1 to) through the relay connection of the speaker line checker 200. It becomes broadcast on 4). The region selection receives a control signal from the main control device 500.

The speaker line checker 200 performs a function of checking the state (short circuit, disconnection, impedance) of each speaker line according to periodic or user demands and transmitting the result to the main controller 500.

In addition, since the number and impedance of speakers 401 to 404 are different for each installed area, if each of the first checked impedances is stored, it is determined whether a failure has occurred based on the impedance change.

As shown in FIG. 2, the speaker line checker of the subway-railway broadcasting facility is a main control unit 202, a user input/output unit 203, a signal transmission unit 204, an impedance measurement unit 205, and an impedance storage unit 206. , Channel selection relay unit 207 and a plurality of channel relays (208 to 209).

Detailed operation procedure of the conventional speaker line checker, the main control unit 202 is a channel to check when receiving a signal to perform a speaker line checker periodically or by a user (administrator) request from the main control device 500 or the user input/output unit 203 The relays (208 to 209: channel 1 RLY to channel 16 RLY) are switched to the channel selection relay unit 207, and the channel selection relay unit 207 is connected to the corresponding channel.

Then, the signal transmitting unit 204 transmits a sine wave of a non-audible frequency, and the impedance measuring unit 205 measures the impedance at this time and transmits the result to the user input/output unit 203 or the main controller 500.

In addition, the determination of whether a failure has occurred is stored in the impedance storage unit 206 in advance, and it is determined whether a failure has occurred based on this.

After the checkers are over, the channel relays (208 to 209) are restored to the amplifier output, and the line checker function of all channels is sequentially performed in the same procedure.

When performing the speaker line checker function, the amplifier 100 output and the speakers 401 to 404 are not connected due to the relays 208 to 209 being blocked.

Due to this, when the speaker line checker function is performed, it cannot be broadcast, and even if it is, the broadcast is interrupted by the checker time.

In other words, in the speaker line checker function, only the function of monitoring and reporting the state of the speaker line, which is the communication line electrically connected to the speaker, is performed, and in the event of a failure, it is not possible to automatically block the speaker line that has failed.

In addition, it has a structure that does not detect the state of the line in real time and monitors only periodically or when requested by the user.

Therefore, in the event of a fire in a building, at the moment of emergency output to all channels at the same time, if a speaker line of any floor (channel) is shorted due to a fire, the protection function of the amplifier 100 causes the operation of the amplifier 100. Emergency broadcast output is cut off, but in such a case, emergency broadcast is not available through all other floor speakers. This has the problem that it does not meet the fire safety standards. That is, for reference, the fire safety standard of Article 5, Paragraph 1 of the emergency broadcast facility can satisfy the criterion that'even if a loudspeaker or wiring on one floor is short-circuited or disconnected due to a fire, there will be no obstacle to fire notification on the other floor'. There was no problem.

Republic of Korea Patent Publication No. 2006-0023759-Voice notification system

Therefore, the present invention is to solve all the disadvantages and problems of the prior art as described above, in the automatic information broadcasting facility of the subway or railway, a plurality of speakers, each connected to a plurality of speaker lines by one amplifier is to be operated Even if any one speaker line is short-circuited or disconnected due to aging or fire in the field, the rest of the speakers, except for the speaker connected to the speaker line, operate normally, so that broadcasts in other regions can be broadcast normally and detected by real-time hardware. Selectively cut off the relay on the floor where the problem occurred before the amplifier is blocked, send audible alarm to the fault LED for the short-circuited channel and buzzer, select and cut-off the short-circuited channel, and set a certain time An object of the present invention is to provide a short circuit breaker for emergency broadcasts of subway-railway broadcasting facilities that can provide automatic recovery.

In order to achieve the above object, the present invention is installed on one floor of an amplifier 100 that receives and amplifies and outputs an audio broadcast signal to be broadcast through a speaker of a broadcasting facility of a subway or railway, and on different floors of a subway or railway station. In the subway-rail broadcasting facility comprising a plurality of speakers 401 to 404 respectively receiving and outputting audio broadcast signals output from the amplifier 100 through each of a plurality of speaker lines, the output of the amplifier 100 If the plurality of relays 605 connected to the plurality of speaker lines connected to the plurality of speakers 401 to 404, respectively, and the audio broadcast signal level are detected as voltages, the predetermined threshold voltage is greater than or equal to the Among the plurality of speaker lines, including the voltage level detector 604 configured to block the relay 605, the remaining speakers except for the speaker connected to the speaker line in the event of a short circuit or disconnection due to aging or fire can operate normally and broadcast normally. For each of the plurality of speaker lines, only the relay 605 connected to the speaker line shorted or disconnected due to aging or fire before the amplifier output cutoff time preset to the amplifier 100 when a line is shorted or a predetermined threshold voltage is exceeded. Emergency blocking of the subway-railway broadcasting equipment, characterized in that it is configured to include, emergency block disconnection device 600, which is selectively blocked, and automatically recovers until the short circuit or disconnection problem is resolved after a preset time. Provide a blocking device.

Here, the emergency broadcast short circuit blocking device 600 monitors the output of the voltage level detection unit 604 in real time, and when the voltage level is normal, the normal level is High (Logic1) level, and when an error occurs, the abnormal level is Low (logic0) level. When sensed, audio is output from the output of the main control unit 601 and the amplifier 100 so that the relay 605 is blocked by latching (holding low) within the output retention time of the voltage level detection unit 604. When inputted and output as channel 1 audio, the current sensing unit 602 senses the current flowing through the channel 1 audio and outputs it with the magnitude of the voltage and delivers it to the HPF 603, and cut off considering that the input signal is an audio broadcast signal. HPF (High Pass Filter) 603, which filters the frequency so that it becomes a preset band, and an LED that displays the corresponding channel in the event of a short circuit or disconnection due to aging or fire among the plurality of speaker lines, operates an audible alarm by operating a buzzer. Characterized in that it comprises a LED display and buzzer unit 606 for sending out, and an automatic recovery timer (Timer) setting unit 607 for setting a time for automatically recovering the relay 605 that is interrupted in the event of a short circuit or overcurrent. do.

In addition, the voltage level detector 604 has a single amplifier capacity of 100 W (amplifier output 100 vrms, 1 A), the amplifier protection function is operated at a protection function at 3 A, and the relay blocking operation is blocked at 1 A per channel, and the output load impedance is parallel speaker impedance per channel. In sum, it is characterized by being designed under the condition of R=100Vrms/1A=100Ω.

In addition, the main control unit 601 lights the LED of the corresponding channel in the LED display and the buzzer unit 606 and drives the buzzer, and the set time is set according to the preset time of the automatic recovery timer (Timer) setting unit 607. When the main control unit 601 clears the operation of the voltage level detection unit 604, it is characterized in that it is set to repeat the recovery operation according to the recovery condition of the line.

According to the present invention has the following effects.

First, when a fire occurs on any one floor of a building during an emergency broadcast, and only the output relay of the floor is selectively blocked before the amplifier protection function is activated when the line is short-circuited or overcurrent flows, the emergency broadcast on the other floor is prevented. You can print normally.

Second, it is automatically released when the line is restored by accepting the automatic recovery function compared to the manual recovery product (a product using fuses).

Third, if installed at the front of the existing speaker line checker, the line is normally checked with the speaker line checker, and even if the line is shorted during broadcasting, only the corresponding line is blocked and does not give the operation of other channels. It is more effective because the track can be checked.

1 is a block diagram for explaining an example of a subway-rail broadcasting facility according to the prior art
2 is a view for explaining in detail the speaker line checker of the subway-rail broadcasting facility shown in FIG. 1;
Figure 3 is a block diagram for explaining an embodiment of a subway-rail broadcasting equipment according to the present invention
FIG. 4 is a block diagram for explaining the emergency broadcast short circuit blocking device shown in FIG. 3 in detail.

If described in detail by the accompanying drawings, preferred embodiments of the present invention.

In addition, the terminology used in the present invention has been selected as a general terminology that is currently widely used as much as possible, but in certain cases, the term is arbitrarily selected by the applicant, and in this case, its meaning is described in detail in the description of the applicable invention. It is intended to clarify that the present invention should be grasped as a meaning of a term rather than a name of. In addition, in describing the embodiments, descriptions of technical contents well known in the technical field to which the present invention pertains and which are not directly related to the present invention will be omitted. This is to more clearly communicate the subject matter of the present invention by omitting unnecessary description.

3 is a block diagram for explaining an embodiment of a subway-rail broadcasting facility according to the present invention, and FIG. 4 is a block diagram for explaining an emergency broadcast short circuit blocking device shown in FIG. 3 in detail.

As shown in FIG. 3, an embodiment of a subway-rail broadcasting facility according to the present invention includes an amplifier 100, an emergency broadcast short circuit breaker 600, a terminal terminal 300, a plurality of speakers 401 to 404, and a main word It consists of a device 500.

Here, the amplifier 100 receives an audio broadcast signal to be broadcast through a speaker of a broadcasting facility of a subway or a railway and amplifies it.

Emergency broadcast short circuit blocking device 600

The terminal terminal 300 is a fuse for protecting the amplifier 100 when a problem such as a fire occurs when the audio broadcast signal of the amplifier 100 is transmitted to the plurality of speakers 401 to 404.

The plurality of speakers 1 to 4 (401 to 404) are a plurality of speakers installed in different areas of the subway or railway station (for example, different floors or different areas on the same floor).

The main control device 500 is one of the single amplifier 100, the audio broadcast signal of the emergency broadcast short circuit breaker device 600 through the relay connection of any region of the speaker 1 to speaker 4, or all regions of the speaker 1 to 4 It is controlled to be broadcast through.

The emergency broadcast short circuit blocking device 600, as shown in Figure 4, the main control unit 601, the current sensing unit 602, HPF 603, voltage level detector 604, relay 605, LED display and It is composed of a buzzer 606 and an automatic recovery timer (Timer) setting unit 607.

The main control unit 601 monitors the output of the voltage level detection unit 604 in real time, and when the voltage level is detected from the normal level of High (Logic 1) level, when the abnormal level of Low (logic 0) level is detected, the voltage level detection unit The relay 605 is blocked by latching (holding low) within the output holding time of 604 (for example, set to 1.5 seconds by the hardware element R and C values). The main control unit 601 turns on the LED display and the visible alarm LED of the buzzer unit 606, and operates the buzzer to transmit an audible alarm.

Then, the operation of the voltage level detection unit 604 is cleared by the automatic recovery timer setting unit 607 set by the user (administrator), and the relay 605 is automatically restored when the line state is restored. If it is not recovered, the recovery operation is repeated.

The current sensing unit 602 senses the current flowing through the channel 1 audio when audio is input from the output of the amplifier 100 and outputs to the channel 1 audio, and outputs the magnitude of the voltage to the HPF 603.

The HPF (High Pass Filter) 603 filters the cut-off frequency to a preset band (eg, 20 Hz) in consideration of the input signal being an audio broadcast signal.

The voltage level detection unit 604 is configured to detect the level of the audio broadcast signal as a voltage and cut off the relay 605 when it is equal to or higher than a threshold voltage. To this end, the voltage level detector 604 has a single amplifier capacity of 100W (amplifier output 100vrms, 1A), an amplifier protection function operates at 3A, and a relay blocking operation at 1A per channel (adjustable according to field installation conditions), The output load impedance is the sum of the impedances of the parallel speakers per channel, and is preferably designed under the condition of R=100Vrms/1A=100Ω.

The circuit operates according to these design requirements, and when a current of 1A flows, the current sensing output is 100Vrms. Accordingly, the threshold voltage sets the internal gain to 100Vrms.

Each of the plurality of relays 605 connects the output of the amplifier 100 to the relay output in a normal state, and when a short circuit or overcurrent condition occurs, the corresponding relay output is blocked by the control of the voltage level detector 604.

The LED display and the buzzer unit 606 operate an LED indicating a corresponding channel in case of an output short circuit or overcurrent, and operate an buzzer to transmit an audible alarm.

The automatic recovery timer (Timer) setting unit 607 is a circuit for a user (administrator) to set a time for automatic recovery of the relay 605, which is interrupted in the event of an output short circuit or overcurrent.

The operation of the emergency broadcast short circuit blocking device 600 of the present invention is input from the output of the amplifier 100 to the voltage level detection unit 604 even when there is no audio broadcasting signal (when not broadcasting) or even when there is an audio signal (when broadcasting). Since the signal to be made is 100 mVrms or less, the relay 605 is normally connected and an audio broadcast is output.

The main control unit 601 monitors the voltage level detection unit 604 in real time, but the LED display and the buzzer unit 606 are not driven.

However, in the case of an abnormal state, that is, a line short circuit or an overcurrent of 1 A or more, if the audio broadcast signal current flows over 1 A from the output of the amplifier 100, the output of the current sensing unit 602 becomes 100 mVrms or more, and this signal passes through the HFP 603 to make the voltage Since the threshold voltage (100 mVrsm) set in the level detection unit 604 is greater than or equal to, the output of the voltage level detection unit 604 transitions from a High (Logic 1) level to a Low (Logic 0) level to output the relay 605. Cut off.

If the main control unit 601 that has been monitoring this latches (maintains low) the voltage level detection unit 604 output before the preset time of 1.5 seconds, the relay 605 is blocked and the relay 605 even if no current flows. ) Will remain blocked. In addition, the main control unit 601 turns on the LED of the corresponding channel in the LED display and the buzzer unit 606 and drives the buzzer.

On the other hand, the automatic recovery timer (Timer) setting unit 607 when the set time according to a preset time, the main control unit 601 clears the operation of the voltage level detection unit 604 (Clear) operation according to the recovery condition of the line Repeat.

At this time, in the present invention, it can be assumed that a plurality of channels (16 channels) are accommodated.

Although the present invention has been described as an example as described above, the present invention is not necessarily limited to these examples, and may be variously modified without departing from the spirit of the present invention. Therefore, the examples disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these examples. The scope of protection of the present invention should be interpreted by the following claims, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

100: amplifier 200: speaker line checker
201: checker 202: main fisherman
203: user input and output unit 204: signal transmission unit
205: impedance measurement unit 206: impedance storage unit
207: channel selection relay (16ch) 208~209: channel relay
300: Terminal terminal 401~404: Speaker
500: main control device
600: Emergency broadcasting short circuit blocking device 601: Main control unit
602: current sensing unit 603: HPF (High Pass Filter)
604: voltage level detector 605: relay
606: LED display and buzzer 607: Automatic recovery timer (Timer) setting unit

Claims (4)

One amplifier 100 for receiving and amplifying and outputting an audio broadcast signal to be broadcast through a speaker of a subway or railroad broadcasting facility, and is installed on different floors of a subway or railroad station, and through each of a plurality of speaker lines In the subway-rail broadcasting facility comprising a plurality of speakers (401 ~ 404) for receiving and outputting the audio broadcast signal output from the amplifier 100, respectively,
The output of the amplifier 100 is connected to a plurality of speaker lines connected to the plurality of speakers 401 to 404, a plurality of relays 605, which are respectively connected, and a threshold set in advance by sensing the audio broadcast signal level as a voltage ( Threshold) voltage, and includes a voltage level detector 604 configured to cut off the relay 605,
Each of the plurality of relays 605 is configured to connect the output of the amplifier 100 to a relay output in a normal state, and when a short circuit or an overcurrent condition occurs, the corresponding relay output is blocked by control of the voltage level detector 604. When a short circuit or disconnection occurs due to aging or fire among a plurality of speaker lines, the rest of the speakers, except for the speaker connected to the speaker line, can operate normally and broadcast normally. Only the relay 605 connected to the speaker line that is short-circuited or disconnected due to aging or fire is selectively blocked before the amplifier output cut-off time preset in the amplifier 100, and after the preset time until the short-circuit or disconnection problem is solved. It is configured to include an emergency broadcast short circuit blocking device 600 to repeat the automatic recovery;
The emergency broadcast short circuit blocking device 600,
Monitor the output of the voltage level detection unit 604 in real time and maintain the output of the voltage level detection unit 604 when the voltage level is detected as a normal level of the high (Logic1) level and an abnormal level of Low (logic0) when a failure occurs. A main control unit 601 that latches (holds low) within a time to maintain the relay 605 blocking;
When the audio is input from the output of the amplifier 100 and output as channel 1 audio, a current sensing unit 602 that senses the current flowing through the channel 1 audio and outputs it at a voltage level and delivers it to the HPF 603,
HPF (High Pass Filter) 603 for filtering so that the cut-off frequency is a preset band in consideration of the input signal is an audio broadcast signal,
An LED display and a buzzer unit 606 that operates an LED indicating a corresponding channel when a short circuit or disconnection occurs due to aging or fire among the plurality of speaker lines, and operates an buzzer to transmit an audible alarm.
It comprises an automatic recovery timer (Timer) setting unit 607 for setting the time to automatically recover the relay 605 that was cut off in the event of an output short circuit or over current,
The voltage level detector 604 has a single amplifier capacity of 100 W (amplifier output 100 vrms, 1 A), an amplifier protection function is operated at a protection function at 3 A, and a relay blocking operation is interrupted at 1 A per channel, and the output load impedance is parallel speaker impedance per channel. In sum, R=100Vrms/1A=100Ω is designed.
The main control unit 601 lights up the LED of the corresponding channel in the LED display and the buzzer unit 606 and drives the buzzer, and the set time is set according to the preset time of the automatic recovery timer (Timer) setting unit 607. When the main control unit 601 is set to clear the operation of the voltage level detection unit 604 to repeat the recovery operation according to the recovery condition of the line, the relay 605 is automatically restored when the line condition is restored. Emergency broadcast short circuit blocking device of the subway-rail broadcasting equipment, characterized in that to be restored.
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