CN106788831A - An emergency broadcast system - Google Patents

Abstract

The invention discloses an emergency broadcasting system, which comprises at least three levels of broadcasting mechanisms which are backed up with each other; the three-stage playing mechanism comprises a first-stage playing mechanism, a second-stage playing mechanism and a third-stage playing mechanism; the first-stage broadcasting mechanism and the second-stage broadcasting mechanism are transmitted to a third-stage broadcasting mechanism through an optical fiber network; the third-stage broadcasting mechanism and the digital television signal are connected to a digital television front-end multiplexer; the digital television front-end multiplexer is in communication connection with the playing terminal through the modulation transmitter; the first-stage broadcasting mechanism is also provided with a broadcasting host and a broadcasting interface communicated with the input end of the broadcasting host; and a main switch in communication with the output of the broadcast host; a frequency modulation broadcasting system, a field monitoring sound box and a partition management switch which are communicated with the main switch; and the output end of the partition management switch is in communication connection with the broadcast loudspeaker boxes in each area. The emergency broadcasting system can fully deal with large-scale disasters and small-scale local emergency broadcasting.

Description

An emergency broadcast system

technical field

The invention relates to a broadcasting system, in particular to an emergency broadcasting system, and belongs to the technical field of broadcasting systems.

Background technique

The emergency broadcasting system is an important part of the security system; the public broadcasting system used for emergency broadcasting of public emergencies must comply with the following content in addition to the general specifications: Broadcasting; have 24V or 220V emergency backup power supply, the switching time of main and backup power supply is not more than 1s; emergency backup power supply can support emergency broadcasting for at least 15 minutes; if batteries are used as backup power supply, they should be equipped with automatic charging device; The rated power of the power amplifier used for public event emergency broadcast is not less than 1.5 times the sum of the power of all the loudspeakers it drives; the total power capacity of the power amplifier used for emergency broadcast of public event must meet the requirements of all broadcasting zones to issue emergency broadcasts at the same time , instead of only meeting the requirements of several adjacent partitions; the emergency broadcast of public emergencies should have the highest priority; the system should be able to put the system in an emergency state by the operator or receive signals from fire alarms and other alarm systems Play warning signals or alarm voice files to the alarm area within 3 seconds, regardless of the current state of the relevant alarm area (including shutdown and dormancy); the volume of emergency broadcasts for public emergencies should be automatically adjusted to the maximum volume allowed by the system ; When all broadcasting service areas need to manually issue emergency broadcasts for public emergencies at the same time, they should be able to be in place with one button (only one key/button/switch can be operated to enter the emergency broadcasting state); speakers in broadcasting areas with fire hazards and The wiring should be flame retardant; in the broadcasting area with hidden dangers of water and fire disasters, the broadcasting speakers should pass the waterproof certification of level 6 or above, so that they can still work under short-term spraying conditions (such as automatic spraying system activation); The rated power of a single loudspeaker (or sound column) for emergency broadcasting shall not be less than 3W; in public places such as aisles, halls, restaurants, etc., the loudspeaker configuration shall ensure that the walking distance from any part of the floor to the nearest loudspeaker shall not exceed 15m . Loudspeakers should be installed at the intersections and corners of the aisles. The distance from the last loudspeaker at the end of the aisle to the wall shall not be greater than 8m; the failure of a single power amplifier shall not lead to the subversion of the entire broadcasting system, otherwise the main/standby power amplifier and corresponding automatic switching equipment shall be configured; the failure of a single loudspeaker shall not cause the failure of the entire broadcasting area, otherwise it shall be Timely discovery; the fire resistance of the relevant connectors should comply with the relevant regulations of IEC60268-11 or IEC60268-12; the equipment used for emergency broadcasting of public emergencies should be in a hot standby state, which can be automatically started when the alarm signal is triggered, and can automatically Monitoring and automatic generation of operation records; there are many types of existing emergency broadcasting systems, such as Chinese patent application number: 201410217206.X, which discloses an emergency broadcasting system, including multi-level broadcasting units. Controller security module, terminal and terminal security module; among them, the front-end generates control instructions and audio of emergency broadcast and sends them to the controller at the same level; the controller receives the control instructions and audio from the front-end of the same level, or the control packets and audio from the superior controller audio, and send it to the security module of the controller at the same level, and forward the control packet and audio; the security module of the controller checks and analyzes the control command or control packet, encrypts the control command to generate a control packet, and sets the working status information of the controller at the same level , and return to the controller at this level; the terminal receives the control packet and audio from the controller at this level and sends it to the terminal security module to play the audio; the terminal security module is decrypting and authenticating the control packet and setting the working status of the terminal at this level The information is returned to the terminal at the same level; the present invention improves the compatibility and safety of the emergency broadcast system; but it cannot be compatible with large-scale disasters and small local emergency broadcasts.

Contents of the invention

In order to solve the above-mentioned problems, the present invention proposes an emergency broadcasting system, which can realize triple emergency broadcasting by digital TV, broadcast speakers and radios, and should fully deal with large-scale disasters, ensuring that there is at least one emergency broadcasting at each stage; at the same time, through the broadcasting host And the on-site telephone broadcasting module can fully cope with small local area emergency broadcasting.

The emergency broadcasting system of the present invention includes at least three levels of broadcasting institutions that are mutually backed up; the three-level broadcasting institutions include the first-level broadcasting institutions successively arranged in the confidential bureau of the local people's government, and the first-level broadcasting organization of the local people's broadcasting station studio. The second-level broadcast organization and the third-level broadcast organization of the local cable TV network broadcast control room; the first-level and second-level broadcast organizations transmit to the third-level broadcast organization through the optical fiber network; the third-level The broadcast mechanism and the digital TV signal are connected to the digital TV front-end multiplexer; the digital TV front-end multiplexer is connected to the playback terminal through a modulation transmitter; the first-level broadcast mechanism is also provided with a broadcast host, and The broadcasting interface of the broadcast host input communication; and the main switch that communicates with the output of the broadcast host; and the FM broadcast system, the on-site monitoring speaker and the zone management switch that communicate with the main switch; the output terminals of the zone management switch are connected to each area broadcast speakers.

As a preferred technical solution, the free port of the digital TV front-end multiplexer is connected to the third-level broadcasting organization through communication.

As a preferred technical solution, the third-level broadcast organization broadcasts the upgraded stream, and all broadcast terminals in the network automatically switch to the emergency digital audio broadcast state after receiving the emergency broadcast specific logo, and broadcast the emergency broadcast content, and the corresponding background text appears at the same time .

As a preferred technical solution, the digital audio signal output by the third-level broadcasting organization adopts the MPEG-1 or MPEG-2 second/third layer encoding method, and its encoding rate is between 96~192kbit/s.

As a preferred technical solution, the radio speaker has a built-in power storage module; the power storage module is dually powered by solar energy and a power grid.

As a preferred technical solution, the main exchange communicates with the FM broadcasting system; after releasing the emergency broadcast information, it uses the main exchange to broadcast the data entered by the broadcasting interface to the broadcasting host to the FM broadcasting system, and releases to various channels through the Internet; The FM broadcasting system completes the carrier modulation, and at the same time, attaches the modulated wave output by the data information such as RDS, and transmits it to the receiving controller through various channels.

As a preferred technical solution, the broadcasting interface is composed of a telephone broadcasting interface and a recording broadcasting interface.

As a preferred technical solution, a ringing detection circuit is provided at the telephone broadcasting interface.

As a preferred technical solution, the partition management switch communicates with the broadcast speaker through a digital audio optical transceiver.

As a preferred technical solution, the input end of the digital audio optical transceiver is also connected with a live telephone broadcast module. After the broadcast speaker receives the data, it is determined by detection that it is one or two data channels in the partition management switch and the live telephone broadcast module. When inputting one channel, it will play directly; when inputting two channels, it will play the voice data input by the on-site telephone broadcasting module.

Compared with the prior art, the present invention shows that the emergency broadcasting system of the present invention can realize triple emergency broadcasting by digital TV, playing sound box and radio, and should fully deal with large-scale disasters, ensuring that there is at least one emergency broadcasting at each stage; The host and on-site telephone broadcasting module can fully cope with small local area emergency broadcasting.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the emergency broadcasting system of the present invention.

detailed description

Example 1:

As shown in Figure 1, the emergency broadcasting system of the present invention includes at least three levels of broadcasting institutions that are mutually backed up; The second-level broadcasting organization of the radio station studio and the third-level broadcasting organization of the local cable TV network broadcast control room; the first-level and second-level broadcasting organizations are transmitted to the third-level broadcasting organization through the optical fiber network ; The third-level broadcast mechanism and the digital TV signal are connected to the digital TV front-end multiplexer; the digital TV front-end multiplexer is connected to the playback terminal through a modulation transmitter; the first-level broadcast mechanism is also set There is a broadcasting host, and a broadcasting interface communicating with the input of the broadcasting host; and a main switch communicating with the output of the broadcasting host; and an FM broadcasting system, on-site monitoring speakers, and a partition management switch communicating with the main switch; the output of the partition management switch is The end-to-end communication is connected to the broadcast loudspeakers in each zone.

The free port of the digital TV front-end multiplexer is connected to the third-level broadcasting organization.

The third-level broadcast organization broadcasts the upgraded stream, and all broadcast terminals in the network automatically switch to the emergency digital audio broadcast state after receiving the emergency broadcast specific logo, and broadcast the emergency broadcast content, and the corresponding background text appears at the same time.

The digital audio signal output by the third-level broadcasting mechanism adopts MPEG-1 or MPEG-2 second/third layer encoding method, and its encoding rate is between 96~192kbit/s.

The broadcast speaker has a built-in power storage module; the power storage module is dually powered by solar energy and a power grid.

The main exchange communicates with the FM broadcasting system; after releasing the emergency broadcast information, it uses the main exchange to broadcast the data entered by the broadcasting interface to the broadcasting host to the FM broadcasting system, and uses the Internet to publish to various channels; the FM broadcasting system completes the carrier modulation , and at the same time, attach the modulated wave output by the data information of RDS and other methods, and transmit it to the receiving controller through various channels.

The broadcasting interface is composed of a telephone broadcasting interface and a recording broadcasting interface.

A ringing detection circuit is arranged at the telephone broadcasting interface.

The partition management switch communicates with the broadcast speaker through the digital audio optical transceiver.

The input end of the digital audio optical transceiver is also connected with a live telephone broadcast module in parallel. After the broadcast speaker receives the data, it is determined by detection that it is one or two data inputs in the partition management switch and the live telephone broadcast module. Play, when there are two inputs, play the voice data input by the on-site telephone broadcast module.

The emergency broadcasting system of the present invention can realize triple emergency broadcasting by digital TV, speaker and radio, and should fully cope with large-scale disasters, ensuring that there is at least one emergency broadcasting at each stage; at the same time, it can fully respond to broadcasting through the broadcasting host and the on-site telephone broadcasting module Small local area emergency broadcast.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (10)

1. A kind of emergency broadcasting system, it is characterized in that: comprise the at least three-level broadcasting organization of mutual backup; Described three-level broadcasting organization comprises the first-level broadcasting organization that is arranged on the confidential bureau of local people's government successively, local people's broadcasting organization The second-level broadcast organization of the radio studio and the third-level broadcast organization of the local cable TV network broadcast control room; the first-level and second-level broadcast organizations are transmitted to the third-level broadcast organization through the optical fiber network; The third-level broadcast mechanism and the digital TV signal are connected to the digital TV front-end multiplexer; the digital TV front-end multiplexer is connected to the playback terminal through a modulation transmitter; the first-level broadcast mechanism is also provided with Broadcast host, and the broadcasting interface that communicates with the input end of the broadcast host; and the main switch that communicates with the output end of the broadcast host; and the FM broadcast system, the on-site monitor speaker and the partition management switch that communicate with the main switch; the output end of the partition management switch Communications are connected to the PA loudspeakers in each zone. 2. The emergency broadcasting system according to claim 1, further characterized in that: the idle port of the digital TV front-end multiplexer is connected to the third-level broadcasting organization through communication. 3. The emergency broadcasting system according to claim 1, further characterized in that: the third-level broadcasting organization broadcasts the upgraded stream, and all broadcasting terminals in the network automatically switch to the state of emergency digital audio broadcasting after receiving the emergency broadcasting specific identification , to broadcast the emergency broadcast content, and the corresponding background text appears at the same time. 4. The emergency broadcasting system according to claim 1, further characterized in that: the digital audio signal output by the third-level broadcast mechanism adopts the MPEG-1 or MPEG-2 second/third layer encoding method, and its encoding The rate is between 96~192kbit/s. 5. The emergency broadcasting system according to claim 1, further characterized in that: the broadcast speaker has a built-in power storage module; and the power storage module is dually powered by solar energy and a power grid. 6. The emergency broadcast system according to claim 1, further characterized in that: the main exchange communicates with the FM broadcast system; after releasing the emergency broadcast information, it uses the main exchange to broadcast the broadcast interface to the FM broadcast system to the broadcast host The entered data is also released to various channels through the Internet; the FM broadcasting system completes the carrier modulation, and at the same time, attaches the modulated wave output by the data information such as RDS, and transmits it to the receiving controller through various channels. 7. The emergency broadcasting system according to claim 1, further characterized in that: the broadcasting interface is composed of a telephone broadcasting interface and a recording broadcasting interface. 8. The emergency broadcasting system according to claim 7, further characterized in that: a ringing detection circuit is provided at the telephone broadcasting interface. 9. The emergency broadcast system according to claim 1, further characterized in that: the zone management switch communicates with the broadcast speaker through a digital audio optical transceiver. 10. The emergency broadcasting system according to claim 1, further characterized in that: the input end of the broadcasting speaker is also connected with a live telephone broadcasting module in parallel.