KR102030483B1 - The intergrated multimedia emergency broadcasting system - Google Patents

Abstract

The present invention relates to an integrated multimedia emergency broadcasting system capable of minimizing the number of casualties. According to the present invention, the integrated multimedia emergency broadcasting system comprises: an ordinary guidance broadcasting transmission unit; an earthquake detection unit; an emergency guidance broadcasting transmission unit; an audio mixer; an output side amplifier; a speaker; a speaker line checking and switching unit; and a main controller outputting fire or earthquake evacuation guidance broadcasting when receiving an emergency signal from the emergency guidance broadcasting transmission unit and controlling the speaker line checking and switching unit when a short-circuited or cut speaker line is detected to open the short-circuited or cut speaker line.

Description

Integrated multimedia emergency broadcasting system

The present invention relates to an integrated multimedia emergency broadcasting system, and more particularly, to provide an integrated multimedia emergency broadcast, which normally transmits an announcement broadcast inside and outside the building, and sends an emergency announcement broadcast for evacuation in case of fire or earthquake. It's about the system.

In general, the public address broadcasting system is a broadcasting system for the entire building, and can provide background music, radio broadcasting functions, and various additional services, and has compatibility, safety, and expandability with other devices.

In addition, the general public announcements and announcements can be delivered in general, people in the building can be evacuated safely in an emergency can protect people and property and improve the convenience of life.

The term "the whole building" refers to the building of all the institutions or an organization or the whole building.

The dictionary meaning of the broadcast is defined as 'to send out an audio or video as a radio wave so that it can be widely seen and heard through radio or television.'

FM radio, terrestrial television, etc., which we commonly encounter, correspond to broadcasting. In other words, broadcasting to a large number of users according to purpose and purpose is called broadcasting.

The Public Address (PA) is a public address system including an input unit, a control unit, an amplifier, and an output unit constituting the system as a broadcasting system for an entire institution or an entire building.

Public address broadcasting is a broadcasting system installed in schools, government offices, large buildings, harbors, airports, etc., as well as in-building announcements such as building announcements, music broadcasts, and radio broadcasts. It works in conjunction with evacuation and rescue broadcasts.

As an effect of the public address facility, first, a general public announcement or a guide broadcast may be delivered in a building, and various guide broadcasts may be delivered to each room.

Second, it is possible to manage selection by floor and broadcasting area, and it can protect life and property with guided broadcasting or general information broadcasting facilities, and improve convenience of living.

Third, it is possible to evacuate personnel in the building safely according to the fire fighting method.

Fourth, when a fire occurs, it can be notified of the fire occurrence automatically in conjunction with the fire signal, it is also possible to broadcast induction by manual operation.

However, the existing public address facility has a problem that can miss the Golden Time for evacuation because the administrator has no choice but to send the earthquake evacuation broadcast through manual operation when an earthquake occurs.

On the other hand, the prior art of the present invention has been filed and registered the "integrated broadcast system" of the utility model registration number "20-0411700" filed and registered, the integrated broadcast system is not only public address broadcasting but also individual multimedia, cable television, closed circuit The present invention relates to an integrated broadcasting system capable of efficiently integrating and providing various multimedia services such as television and the Internet.

However, the integrated broadcasting system may miss a golden time for evacuation because equipment managers who recognize a dangerous situation in case of an earthquake or fire have to send out a direct broadcast, which may cause a loss of lives or damage to property.

In addition, there is no means for self-diagnosis when the speaker line is short-circuited or disconnected, which may cause a problem that all speakers are inoperable due to one shorted speaker line, and an emergency announcement due to the disconnected speaker line. There was a problem that generation can not be heard.

Korea Utility Model Registration Number "20-0411700" (2006.03.16)

Accordingly, an object of the present invention is to provide an integrated multimedia emergency broadcast system capable of minimizing human injury by sending an emergency announcement to the inside and outside of a building simultaneously with an earthquake in order to solve the above problems.

In addition, another object of the present invention is to detect a disconnected or shorted speaker line, and the shorted speaker line immediately open (Open) the integrated multimedia emergency that can solve the phenomenon that all the speaker is not operated due to the shorted speaker line It is to provide a broadcasting system.

Integrated multimedia emergency broadcasting system according to the present invention for achieving the above object is a general guide broadcast transmission unit for transmitting the normal general broadcast; An earthquake detection unit for detecting an earthquake when an earthquake occurs; An emergency announcement broadcast transmission unit for transmitting a fire evacuation announcement broadcast when a fire occurs or transmitting an earthquake evacuation announcement broadcast when an earthquake is detected by the earthquake detection unit; Mixing the broadcasts transmitted from the general announcement broadcast transmission unit or the broadcasts transmitted from the emergency announcement broadcast transmission unit or the broadcasts transmitted from the general announcement broadcast transmission unit or the broadcasts transmitted from the emergency announcement broadcast transmission unit (Mixing) An audio mixer for outputting the audio mixer; An output amplifier for amplifying a broadcast for each output channel of the audio mixer; A speaker that corresponds to an output channel of the audio mixer 1: 1 and receives a broadcast for each output channel of the audio mixer amplified by the output side amplifier through a speaker line and outputs sound waves; A speaker line checking and switching unit for checking whether the speaker line connected between the output amplifier and the speaker is short-circuited or disconnected, and opening and closing the speaker line for each speaker channel; And controlling an audio mixer when an emergency signal is input from the emergency announcement broadcast transmitter to output a fire escape guidance broadcast or an earthquake evacuation announcement broadcast from the emergency announcement broadcast transmitter via an audio mixer, and check the speaker line. And controlling a switching unit to transmit a fire evacuation announcement or an earthquake evacuation announcement through a specific speaker channel, and control the speaker line check and switching unit when a shorted or disconnected speaker line is detected from the speaker line check and switching unit. It consists of a main controller (Main Controller) for opening (short) or short-circuit speaker line.

The integrated multimedia emergency broadcast system according to the present invention having such a configuration can minimize emergency or broadcast damage to the building by sending an emergency announcement to the inside and outside of the building immediately when an earthquake or fire occurs.

In addition, the present invention is to check whether the short-circuit and the disconnection for a plurality of speaker lines in real time, and when a shorted or disconnected speaker line occurs, the channel of the corresponding speaker line is detected to enable fast maintenance, short circuit The loudspeaker line was opened immediately, and the good or loudspeaker line was normally broadcasted.

1 is a control block diagram of the present invention;
2 is a timing diagram of an earthquake detection unit;
3 is a control block diagram of the earthquake detection unit;
4 is a control circuit diagram of an earthquake presence determining unit, a first digital signal generating unit, a magnitude 5 or higher determining unit, and a second digital signal generating unit;
5 is a control block diagram of an earthquake detection module;
6 is a control circuit diagram of an earthquake detection module.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

Integrated multimedia emergency broadcasting system according to the present invention, as shown in Figure 1, a general guide broadcast transmitter (1) for transmitting the normal general broadcast; An earthquake detector (2) for detecting an earthquake when an earthquake occurs; An emergency guide broadcast transmitter 3 for transmitting a fire evacuation announcement broadcast when a fire has occurred or an earthquake evacuation announcement broadcast if an earthquake is detected by the earthquake detection unit 2; A broadcast transmitted from the general guide broadcast transmitter 1 or a broadcast transmitted from the emergency guide broadcast transmitter 3 or a broadcast transmitted from the general guide broadcast transmitter 1 or the emergency guide broadcast transmitter; An audio mixer 4 for mixing and outputting the broadcasts transmitted from (3); An output side amplifier 5 for amplifying the broadcast for each output channel of the audio mixer 4; The output channel of the audio mixer 4 corresponding to the output channel of the audio mixer 4 in 1: 1 correspondence and amplified by the output side amplifier 5 is inputted through the speaker 6 line and output as sound waves. Speaker 6; The speaker line check and switching unit 7 which checks whether the speaker 6 line connected between the output amplifier 5 and the speaker 6 is shorted or disconnected, and opens and closes the speaker 6 channel for each speaker 6 channel. ; And a fire evacuation announcement broadcast or earthquake transmitted from the emergency announcement broadcast transmitter 3 through the audio mixer 4 by controlling the audio mixer 4 when an emergency signal is input from the emergency announcement broadcast transmitter 3. The evacuation guidance broadcast is output, and the speaker line check and switching unit 7 is controlled so that a fire evacuation announcement or an earthquake evacuation announcement is transmitted through a specific speaker 6 channel, and the speaker line check and switching unit is provided. Main controller 8 which opens the shorted or disconnected speaker 6 line by controlling the speaker line check and switching unit 7 when the shorted or disconnected speaker 6 line is detected from (7). )

The general broadcast transmitted from the general guide broadcast transmitter 1 may include a voice signal input through a microphone, a chime bell signal, a siren signal, a media player or a digital tuner. It is an audio signal.

The speaker line check and switching unit 7 inputs an inaudible signal of 20 kHz or more to the input terminal of each speaker 6 line, and then detects the strength of the inaudible signal from each speaker 6 line, If the intensity of the blue signal is less than or equal to the set reference value, it is determined that the speaker 6 line is short-circuited, and if the intensity of the non-auditory signal is greater than or equal to the set reference value, it is determined that the speaker 6 line is disconnected.

As shown in Figures 2 to 3, the earthquake detecting unit 2 detects an earthquake and outputs a voltage signal proportional to the strength of the earthquake; An earthquake presence determining unit 22 which receives a voltage signal from the earthquake detection module 21 and determines whether an earthquake has occurred; And a first digital signal generator for outputting a high digital signal in which an earthquake is not detected, and outputting a low digital signal when it is determined that an earthquake has occurred through the earthquake determination unit 22. (23), wherein the emergency announcement broadcast section (3) is configured to provide a current earthquake and an earthquake to the audio mixer (4) when a low digital signal is input from the first digital signal generator (23). Send evacuation announcement signal.

As illustrated in FIG. 4, the earthquake presence determining unit 22 includes: a first signal attenuation prevention unit 221 for outputting the voltage input from the earthquake detection module 21 without signal attenuation; A first reference voltage generator 222 outputting a reference voltage corresponding to the magnitude '0'; As a result of comparing the voltage output from the first signal attenuation prevention part 221 and the voltage output from the first reference voltage generation part 222, the voltage output from the first signal attenuation prevention part 221 becomes the first value. When the output voltage is higher than the voltage output from the reference voltage generator 222, a high digital signal is output, while the voltage output from the first signal attenuation prevention unit 221 is output from the first reference voltage generator 222. A first comparator 223 for outputting a low digital signal when the voltage is less than the output voltage; And a first high frequency output prevention unit 224 connected to an output terminal of the first comparator 223 to block a high frequency signal output from the first comparator 223.

As illustrated in FIG. 4, the first signal attenuation prevention unit 221 is connected to an inverting (−) input terminal and an output terminal, and outputs an output signal of the earthquake detection module 21 through a non-inverting (+) input terminal. It includes a first op amp 2211 receiving the input.

The earthquake presence determining unit 22 outputs a low digital signal in which an earthquake is not normally generated, but outputs a high digital signal when the earthquake magnitude exceeds 0, and the first digital signal. As shown in FIG. 4, the generation unit 23 is currently outputting when a rising edge is detected from the output signal of the earthquake presence determining unit 22 while outputting a high digital signal. A first rising edge detector 231 for converting a high digital signal into a low digital signal and outputting the converted high digital signal; A pull-up resistor 232 to which an input terminal is powered; And an output signal of the first rising edge detector 231 and an output signal of the pull-up resistor 232 through two input terminals, respectively, and output a high digital signal during the first rising edge detector. And a first and gate 233 which outputs the low digital signal when the low digital signal is input from the 231.

As shown in FIG. 3, the earthquake detecting unit 2 detects an earthquake and outputs a voltage signal proportional to the strength of the earthquake; A magnitude 5 or more determination unit 24 which analyzes the voltage signal output from the earthquake detection module 21 and determines whether the current earthquake is of magnitude 5 or more; And outputting a high digital signal when the magnitude of the earthquake determined by the magnitude 5 or higher determination unit 24 is less than the magnitude 5, while the magnitude of the earthquake determined by the magnitude 5 or more determination unit 24 is output. And a second digital signal generator 25 for outputting a low digital signal when the magnitude is greater than or equal to 5, and the emergency announcement broadcast transmitter 3 includes the first digital signal generator 23 and the second signal. When a low digital signal is input from the digital signal generator 25, the earthquake evacuation announcement broadcast signal corresponding to magnitude 5 or more is transmitted to the audio mixer 4.

As shown in FIG. 4, the magnitude 5 or more determination unit 24 includes: a second signal attenuation prevention unit 241 for outputting the voltage input from the earthquake detection module 21 without signal attenuation; A second reference voltage generator 242 for outputting a reference voltage corresponding to the magnitude '5'; As a result of comparing the voltage output from the second signal attenuation prevention part 241 with the voltage output from the second reference voltage generation part 242, the voltage output from the second signal attenuation prevention part 241 becomes the second voltage. When the output voltage is higher than the voltage output from the reference voltage generator 242, a high digital signal is output, while the voltage output from the second signal attenuation prevention unit 241 is output from the second reference voltage generator 242. A second comparator 243 for outputting a low digital signal when the voltage is less than the output voltage; And a second high frequency output prevention unit 244 connected to an output terminal of the second comparator 243 to block a high frequency signal output from the second comparator 243.

As shown in FIG. 4, the second signal attenuation prevention unit 241 is connected to an inverting (−) input terminal and an output terminal and outputs an output signal of the seismic sensing module 21 through a non-inverting (+) input terminal. It includes a second op amp 2411 that receives the input.

The magnitude 5 or higher determination unit 24 outputs a low digital signal when the earthquake is less than 5, and outputs a high digital signal when the earthquake is more than 5 and generates the second digital signal. As shown in FIG. 4, the unit 25 is currently being output when a rising edge is detected from the output signal of the magnitude 5 or higher determination unit 24 while outputting a high digital signal. A second rising edge detector 251 for converting a high digital signal into a low digital signal and outputting the converted high digital signal; The output signal of the second rising edge detector 251 and the output signal of the emergency announcement broadcast transmitter 3 inputted through two input terminals are ANDed to output a high digital signal when the amplitude is less than 5. In addition, when the magnitude is greater than or equal to 5, a second and gate 253 for outputting a low digital signal is included.

The emergency announcement broadcast transmitter 3 converts the output signal of the second and gate 253 into a low digital signal while the high and digital signal is input to the second and gate 253. Detects an earthquake of magnitude 5 or higher.

The earthquake detection unit 2 includes an earthquake detection module 21 that detects an earthquake and outputs a voltage signal proportional to the strength of the earthquake, and the earthquake detection module 21 as shown in FIG. A seismic motion sensor 211 that detects the signal and emits a sine wave voltage signal whose amplitude changes according to the earthquake intensity through two output lines; A first amplification and noise component that differentially amplifies the voltage difference between the two output lines extending from the seismic motion sensor 211 and removes common noise components included in the two output lines extending from the seismic motion sensor 211. Reject 212; A reference point adjuster (213) for adjusting a DC offset voltage level of the signal output from the first amplification and noise component removing unit (212); And a secondary noise component remover 214 for secondarily removing noise components included in an output signal of the primary amplification and noise component remover 212 whose DC offset voltage level is adjusted by the reference point adjuster 213. It includes.

The primary amplification and noise component removing unit 212 amplifies a voltage difference between two output lines extending from the seismic motion sensor 211 by five times or more.

배 증폭시킨다.As illustrated in FIG. 6, the first amplification and noise component removing unit 212 includes a first output line P of two output lines whose non-inverting (+) input terminals extend from the earthquake detection module 21. A third op amp 2121 connected to the third op amp; A first resistor 2122 having one end connected to an inverting (−) input terminal of the third operational amplifier 2121 and the other end connected to an output terminal of the third operational amplifier 2121; A fourth op amp 2123 having a non-inverting (+) input terminal connected to a second output line M of two output lines extending from the earthquake detection module 21; A second resistor 2124 having one end connected to an inverting (−) input terminal of the fourth operational amplifier 2123 and the other end connected to an output terminal of the fourth operational amplifier 2123; A third resistor 2125 having one end connected to an inverting input terminal of the third op amp 2121 and the other end connected to an inverting input terminal of the fourth op amp 2123; A fourth resistor 2126 having one end connected to an output terminal of the third op amp 2121; A fifth resistor 2127 having one end connected to an output terminal of the fourth op amp 2123; A fifth op amp (2128) connected with an inverting (−) input terminal to the fourth resistor (2126) and with a noninverting (+) input terminal connected to the fifth resistor (2127); A sixth resistor 2129, one end of which is connected to an inverting input terminal of the fifth operational amplifier 2128 and the other end of which is connected to an output terminal of the fifth operational amplifier 2128; And a seventh resistor 2120 having one end connected to the non-inverting input terminal of the fifth op amp 2128 and the other end connected to the output terminal of the reference point adjuster 213. When the resistance values of the fifth resistor 2127 are the same and the resistance values of the sixth resistor 2129 and the seventh resistor 2120 are the same, the first amplification and noise component removing unit 212 may be configured to be the same. Voltage difference between two output lines P and M extending from the earthquake sensor 211

Amplify 2x.

The reference point adjusting unit 213 boosts the DC offset voltage level of the first amplification and noise component removing unit 212 to 1 V or more.

가 출력된다.As shown in FIG. 6, the reference point adjusting unit 213 includes an eighth resistor 2131 to which DC power is supplied to an input terminal; A Zener diode 2132 is connected to an output terminal of the eighth resistor 2131 and an anode terminal is grounded to output Zener voltage through a cathode terminal. ; An NPN transistor 2133 having a collector terminal connected to an input terminal of the eighth resistor 2131; A sixth op amp 2134 having a non-inverting (+) input terminal connected to a cathode terminal of the zener diode 2132 and an output terminal connected to a base terminal of the NPN transistor 2133; A ninth resistor 2135 having one end connected to an emitter terminal of the NPN transistor 2133 and the other end connected to an inverting input terminal of the sixth operational amplifier 2134; A tenth resistor 2136 having one end connected to an inverting input terminal of the sixth operational amplifier 2134 and the other end grounded; A first capacitor 2137 having one electrode connected to an emitter terminal of the NPN transistor 2133 and the other electrode being grounded to direct an AC component output from the emitter terminal of the NPN transistor 2133 to ground; ; And an inverting (-) input terminal and an output terminal connected thereto, and a non-inverting (+) input terminal connected to an emitter terminal of the NPN transistor 2133 to be output from the emitter terminal of the NPN transistor 2133. From the output terminal of the seventh operational amplifier 2138, including a seventh operational amplifier 2138 to prevent the DC voltage is attenuated

Is output.

The primary amplification and noise component removing unit 212 uses a DC voltage output from the reference point adjusting unit 213 as a DC offset voltage.

The secondary noise component remover 214 attenuates a signal of 100 Hz or more among the signals output from the primary amplification and noise component remover 212.

이상의 주파수를 감쇄한다.As illustrated in FIG. 6, the secondary noise component remover 214 includes an eleventh resistor 2141 having one end connected to an output terminal of the primary amplification and noise component remover 212; A twelfth resistor 2142 having one end connected to the other end of the eleventh resistor 2141; A thirteenth resistor 2143 having one end connected to the other end of the eleventh resistor 2141; An eighth op amp 2144 having an inverting input terminal connected to the other end of the twelfth resistor 2142, an output terminal connected to the other end of the thirteenth resistor 2143, and a non-inverting input terminal grounded; A second capacitor 2145 having one electrode connected to the other end of the eleventh resistor 2141 and the other electrode grounded; And a third capacitor 2147 connected to an inverting input terminal of the eighth operational amplifier 2144 and one electrode connected to an output terminal of the eighth operational amplifier 2144.

The above frequency is attenuated.

The integrated multimedia emergency broadcast system according to the present invention having such a configuration can minimize emergency or broadcast damage to the building by sending an emergency announcement to the inside and outside of the building immediately when an earthquake or fire occurs.

In addition, the present invention checks in real time whether the short circuit and disconnection for a plurality of speaker (6) lines, and when a shorted or disconnected speaker (6) line occurs, the channel of the corresponding speaker (6) line is detected It was possible to make a quick maintenance, and the shorted speaker (6) line immediately open (Open) to the good speaker (6) line to ensure that the announcement or emergency broadcast is normally transmitted.

1. General announcement broadcasting unit 2. Earthquake detection unit
21. Seismic Detection Module 211. Earthquake Motion Sensor
212. First Amplification and Noise Rejection Units 2121. Third Op Amp
2122. First resistor 2123. Fourth operational amplifier
2124. Second Resistance 2125. Third Resistance
2126. Fourth Resistor 2127. Fifth Resistor
2128. Fifth Op Amp 2129. Sixth Resistor
2120. Seventh Resistance 213. Reference Point Adjuster
2131.The eighth resistor 2132.Zener diode
2133.NPN transistor 2134. The sixth op amp
2135. Ninth Resistance 2136. Tenth Resistance
2137.First capacitor 2138.Seventh op amp
214. Second noise component removing unit 2141. Eleventh resistor
2142. Twelfth Resistance 2143. Thirteenth Resistance
2144.Eighth Op Amp 2145.Second Capacitor
2147. Third Capacitor 22. Earthquake Presence Determination Unit
221. First signal attenuation prevention unit 2211. First operational amplifier
222. First reference voltage generator 223. First comparator
224. First high frequency output prevention unit 23. First digital signal generation unit
231. First rising edge detector 232. Pullup resistor
233. First and gate 24. Determination of 5 or more magnitudes
241. Second signal attenuation prevention unit 2411. Second op amp
242. Second reference voltage generator 243. Second comparator
244. Second high frequency output prevention unit 25. Second digital signal generation unit
251. Second rising edge detector 8. Main controller
253. Second and Gate 3. Emergency Information Broadcasting Unit
4. Audio mixer 5. Output amplifier
6. Speaker 7. Speaker line check and switching unit

Claims (10)

A general guide broadcast transmitter 1 for transmitting a general broadcast normally;
An earthquake detector (2) for detecting an earthquake when an earthquake occurs;
An emergency guide broadcast transmitter 3 for transmitting a fire evacuation announcement broadcast when a fire has occurred or an earthquake evacuation announcement broadcast if an earthquake is detected by the earthquake detection unit 2;
A broadcast transmitted from the general guide broadcast transmitter 1 or a broadcast transmitted from the emergency guide broadcast transmitter 3 or a broadcast transmitted from the general guide broadcast transmitter 1 or the emergency guide broadcast transmitter; An audio mixer 4 for mixing and outputting the broadcasts transmitted from (3);
An output side amplifier 5 for amplifying the broadcast for each output channel of the audio mixer 4;
The output channel of the audio mixer 4 corresponding to the output channel of the audio mixer 4 in one-to-one correspondence and amplified by the output side amplifier 5 is inputted through a speaker 6 line and output as sound waves. Speaker 6;
The speaker line check and switching unit 7 which checks whether the speaker 6 line connected between the output amplifier 5 and the speaker 6 is shorted or disconnected, and opens and closes the speaker 6 channel for each speaker 6 channel. ;
And a fire evacuation announcement broadcast or earthquake transmitted from the emergency announcement broadcast transmitter 3 through the audio mixer 4 by controlling the audio mixer 4 when an emergency signal is input from the emergency announcement broadcast transmitter 3. The evacuation guidance broadcast is output, and the speaker line check and switching unit 7 is controlled so that a fire evacuation announcement or an earthquake evacuation announcement is transmitted through a specific speaker 6 channel, and the speaker line check and switching unit is provided. The main controller 8 which controls the speaker line check and switching unit 7 to open the shorted or disconnected speaker 6 line when the shorted or disconnected speaker 6 line is detected from (7). (Main Controller)
The earthquake detection unit 2 includes an earthquake detection module 21 for detecting an earthquake and outputting a voltage signal proportional to the strength of the earthquake.
The seismic detection module 21 includes: a seismic motion sensor 211 which detects an earthquake and emits a sine wave voltage signal whose amplitude varies according to the earthquake intensity through two output lines;
A first amplification and noise component that differentially amplifies the voltage difference between the two output lines extending from the seismic motion sensor 211 and removes common noise components included in the two output lines extending from the seismic motion sensor 211. Reject 212;
A reference point adjuster 213 for adjusting a DC offset voltage level of the signal output from the first amplification and noise component removing unit 212;
The second noise component removing unit 214 for secondarily removing the noise component included in the output signal of the first amplification and noise component removing unit 212 whose DC offset voltage level is adjusted by the reference point adjusting unit 213 is provided. Integrated multimedia emergency broadcasting system comprising a.
According to claim 1,
The earthquake detection unit 2 includes an earthquake detection module 21 for detecting an earthquake and outputting a voltage signal proportional to the strength of the earthquake;
An earthquake presence determining unit 22 which receives a voltage signal from the earthquake detection module 21 and determines whether an earthquake has occurred;
And a first digital signal generator for outputting a high digital signal in which an earthquake is not detected, and outputting a low digital signal when it is determined that an earthquake has occurred through the earthquake determination unit 22. Including 23,
When the low digital signal is input from the first digital signal generator 23, the emergency announcement broadcast transmitter 3 transmits the current earthquake occurrence fact and earthquake evacuation announcement broadcast signal to the audio mixer 4. Integrated multimedia emergency broadcasting system, characterized in that.
The method of claim 2,
The earthquake presence determination unit 22 includes a first signal attenuation prevention unit 221 for outputting the voltage input from the earthquake detection module 21 without signal attenuation;
A first reference voltage generator 222 outputting a reference voltage corresponding to the magnitude '0';
As a result of comparing the voltage output from the first signal attenuation prevention part 221 and the voltage output from the first reference voltage generation part 222, the voltage output from the first signal attenuation prevention part 221 becomes the first value. When the output voltage is higher than the voltage output from the reference voltage generator 222, a high digital signal is output, while the voltage output from the first signal attenuation prevention unit 221 is output from the first reference voltage generator 222. A first comparator 223 for outputting a low digital signal when the voltage is less than the output voltage;
And a first high frequency output prevention unit 224 connected to an output terminal of the first comparator 223 to block a high frequency signal output from the first comparator 223. system.
The method of claim 2,
The earthquake presence determining unit 22 outputs a low digital signal in which an earthquake is not normally generated, but outputs a high digital signal when the earthquake magnitude exceeds 0,
The first digital signal generator 23 is currently outputting high when a rising edge is detected from the output signal of the earthquake presence determiner 22 while outputting a high digital signal. A first rising edge detector 231 for converting a digital signal into a low digital signal and outputting the digital signal;
A pull-up resistor connected to the input terminal;
And an output signal of the first rising edge detector 231 and an output signal of the pull-up resistor 232 through two input terminals, respectively, and output a high digital signal during the first rising edge detector. And a first and gate (233) for outputting a low digital signal when a low digital signal is input from the (231).
The method of claim 2,
The earthquake detection unit 2 includes an earthquake detection module 21 for detecting an earthquake and outputting a voltage signal proportional to the strength of the earthquake;
A magnitude 5 or more determination unit 24 which analyzes the voltage signal output from the earthquake detection module 21 and determines whether the current earthquake is of magnitude 5 or more;
And outputting a high digital signal when the magnitude of the earthquake determined by the magnitude 5 or higher determination unit 24 is less than the magnitude 5, while the magnitude of the earthquake determined by the magnitude 5 or more determination unit 24 is output. A second digital signal generator 25 for outputting a low digital signal when the magnitude is 5 or more;
The emergency announcement broadcasting unit 3 transmits a magnitude 5 to the audio mixer 4 when a low digital signal is input from the first digital signal generator 23 and the second digital signal generator 25. Integrated multimedia emergency broadcasting system, characterized in that for transmitting the earthquake evacuation guidance broadcast signal corresponding to the above.
The method of claim 5,
The magnitude 5 or more determination unit 24 includes a second signal attenuation prevention unit 241 for outputting the voltage input from the earthquake detection module 21 without signal attenuation;
A second reference voltage generator 242 for outputting a reference voltage corresponding to the magnitude '5';
As a result of comparing the voltage output from the second signal attenuation prevention part 241 with the voltage output from the second reference voltage generation part 242, the voltage output from the second signal attenuation prevention part 241 becomes the second voltage. When the output voltage is higher than the voltage output from the reference voltage generator 242, a high digital signal is output, while the voltage output from the second signal attenuation prevention unit 241 is output from the second reference voltage generator 242. A second comparator 243 for outputting a low digital signal when the voltage is less than the output voltage;
And a second high frequency output prevention unit 244 connected to an output terminal of the second comparator 243 to block a high frequency signal output from the second comparator 243. system.
The method of claim 5,
The magnitude 5 or more determination unit 24 outputs a low digital signal when the earthquake is less than 5, and outputs a high digital signal when the earthquake is more than 5,
The second digital signal generator 25 is currently outputting high when a rising edge is detected from the output signal of the magnitude 5 or higher determination unit 24 while outputting a high digital signal. A second rising edge detector 251 for converting a digital signal into a low digital signal and outputting the converted digital signal;
When the output signal of the second rising edge detector 251 inputted through two input terminals and the output signal of the emergency announcement broadcast transmitter 3 are Anded, the digital signal is output when the amplitude is less than 5. If the intensity is 5 or more, a second And gate 253 for outputting a low digital signal is included.
The emergency announcement broadcast transmitter 3 converts the output signal of the second and gate 253 into a low digital signal while the high and digital signal is input to the second and gate 253. Integrated multimedia emergency broadcasting system, characterized by detecting an earthquake of magnitude 5 or more.
delete According to claim 1,
The reference point adjusting unit 213 includes an eighth resistor 2131 to which DC power is supplied to an input terminal;
A Zener diode 2132 is connected to an output terminal of the eighth resistor 2131 and an anode terminal is grounded to output Zener voltage through a cathode terminal. ;
An NPN transistor 2133 having a collector terminal connected to an input terminal of the eighth resistor 2131;
A sixth op amp 2134 having a non-inverting (+) input terminal connected to a cathode terminal of the zener diode 2132 and an output terminal connected to a base terminal of the NPN transistor 2133;
A ninth resistor 2135 having one end connected to an emitter terminal of the NPN transistor 2133 and the other end connected to an inverting input terminal of the sixth operational amplifier 2134;
A tenth resistor 2136 having one end connected to an inverting input terminal of the sixth operational amplifier 2134 and the other end grounded;
A first capacitor 2137 having one electrode connected to an emitter terminal of the NPN transistor 2133 and the other electrode being grounded to direct an AC component output from the emitter terminal of the NPN transistor 2133 to ground; ;
And an inverting (-) input terminal and an output terminal connected thereto, and a non-inverting (+) input terminal connected to an emitter terminal of the NPN transistor 2133 to be output from the emitter terminal of the NPN transistor 2133. A seventh op amp 2138 which prevents the DC voltage from being attenuated,
From the output terminal of the seventh operational amplifier 2138

Is output,
The first amplification and noise component removing unit (212) is an integrated multimedia emergency broadcasting system, characterized in that for using the DC voltage output from the reference point adjustment unit (213) as a DC offset voltage.
According to claim 1,
The secondary noise component removing unit (214) attenuates a signal of 100 Hz or more among the signals output from the primary amplification and noise component removing unit (212).

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