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First, the hotel IP network background music system and fire alarm function requirements
 
1, automatic playback:
 
Every day in the early 9:00 shop when the automatic release, the first 10 minutes of the evening closed automatically broadcast background music and prompts and thank the word. Automatic playback function - the system can be set by the hotel to set the schedule, through the automatic playback software, automatic broadcast background music, opening and closing music, business ads, warm greetings, blessings, staff to get off work music ringtones and so on.
 
2, partition function:
 
According to the different regions, the entire hotel for a reasonable partition management. You can achieve the overall playback of the hotel, you can also achieve a single or multiple hotel area combination to play.
 
Note: This is a program for multiple room areas. The amplifier uses a centralized control mode to control multiple rooms or areas at the same time.
 
In the hall, bathroom, restaurant, private rooms, staircase, channel, front yard, backyard, etc. are installed background music. (Guests may be in any area, staff channel, the work area are required to install).

Requires partition control amplifier. Can be controlled by the partition can be independently controlled each room to play, need music room to play, no one's room can be directly close the background music. You can also play in each room at the same time, but only listen to the same music. Construction can not be complicated, to be economical and practical. (Such as the front yard, the backyard is a control, the lobby of a restaurant control, stairway access to a control of the bathroom, luxury room a control) pre-arranged schedule - according to hotel arrangements and management needs, the system can be scheduled one day and one week schedule, Daily play table can be arbitrarily set, not the time and time length of the restrictions, the week after the play table is arranged, the computer starts every day, the system will automatically determine the day of the week, and then in accordance with the allocation of the playlist automatically play. You can store, modify, edit playlists.
 
The system administrator can always speed automatic broadcast status, enter the manual state, including the volume adjustment, stop the individual area background music player, or emergency broadcast.
 
Week cycle function --- a good week after the broadcast schedule, the cycle can be recycled, without the need to reset every week.

Play a large capacity - can be thousands of music, background music, advertising music, etc. stored in the computer, the formation of a sound file material library for the arrangement of the playlist to choose, but also play the audio files on the disc.
 
Play a variety of file formats - computer broadcast system can play WAV, MID, WMF, MP3 and other audio file formats, while supporting CD to play a variety of music.
 
Set the playback identifier - according to the contents of the play to set their own various types of play identifiers, such as shop welcome song, closed tips, work ringtones, get off work ringtones, XX factory advertising, easy to identify the content and play the file transfer.

3, extended function
 
Requirements of the overall project wiring specifications, the system equipment selection is reasonable, excellent quality, easy to operate, in line with the development of information technology products for the development of the entire background music playback system reserved interface.
 
Play temporary broadcast - shopping malls if you want to play the broadcast content, you can always end the automatic playback status, enter the manual play line play.
 
Unattended - broadcast control host can automatically switch machine, automatically start after the day to identify the day of the week, and then call the day of the playlist automatically play, to achieve unattended.
 
Partition function - because the hotel floor, living area, and then use the network amplifier for partition, you can achieve automatic partitioning function. Such as the food area to play the food business ads, the clothing area to play clothing business ads and so on each other does not affect each other.
 
The hotel has a smoke sensor installed, if found to have fire and other fire accidents, through the background music broadcasting system, emergency broadcast alarm voice, and timely to guide customers to leave the dangerous site.

Second, the hotel IP network background music system and fire alarm Broadcast design:
 
The whole system can be divided into six parts: fire alarm, control equipment, audio equipment, signal amplification processing equipment, transmission lines and speaker systems.
 
Fire alarm: According to the fire sensor triggered by the low-voltage short-circuit / short-circuit signal, the network fire alarm host DM2019 control signal generator, and then the alarm voice through the network terminal DM1100, network front DM2022 and network amplifier, priority broadcast alarm voice.
 
Control equipment: The system is equipped with digital IP network broadcast server, to achieve the entire system of automatic broadcasting, automatic control, automatic power management.
 
Audio equipment: audio source is usually provided for computer music, CD player and recording deck and other equipment; the system is equipped with a network 60 group paging microphone, wired microphone, network 60 series of multicast console and a DVD.

Signal amplifier and processing equipment: broadcast network amplifier is the most important feature of 70V and 100V constant voltage output terminals. This is because the broadcast lines are usually quite long, with high voltage transmission to reduce line losses. For the broadcast system, as long as the total power of the broadcast speaker is less than or equal to the rated power of the amplifier, and the same voltage parameters, can be random access, but taking into account the line loss, aging and other factors, should be appropriate to leave the power margin. If the background music system, broadcast power amplifier rated output power should be broadcast the total power of about 1.3 times the speaker. The system according to the configuration requirements to achieve power amplifier partition because of the region, so the configuration of 26 260W network amplifier.
 
Transmission line: Although the transmission line is simple, but with the system and transmission methods have different requirements. The public address system, because the service area is wide, long distance, in order to reduce the transmission line caused by the loss, often using high-voltage transmission, because the transmission current is small, so the transmission line is not demanding.
 
Speaker system: in principle, depending on the environment selection of different specifications of the broadcast speaker. 5 to 21 layers of corridor, corridor each floor in accordance with the requirements of the collective point of the layout of the ceiling ceiling ceiling, negative floor of the underground parking lot using wall speakers, 1 to 4 floor commercial floor ceiling ceiling.

Third, the system design ideas and selection principles
 
System design ideas
 
To ensure the normative, rational and scientific nature of the system, RH-AUDIO (Ruijie) network broadcasting system in the design, selection, construction and other aspects of strict compliance with the GB national standards and industry standards, for the needs of Party A, In the realization of the required functions on the basis of the project, so that the system's cost performance and stability to the leading domestic level, embodied in the following areas:

(1) normative and scientific
 
A wide range of public address system products, but also to adapt to different occasions, different functional requirements, but also and other weak system coexistence and use, must be from the system design, product development, manufacturing, and extended to the construction, installation, commissioning, until the last Acceptance of the whole process, are in strict accordance with national and industry-related standards and norms, good system of standardized design and scientific management:
 
The main specifications for implementation and reference include:
 
A, design specification class
 
GYJ25 "hall sound reinforcement system acoustic characteristics of indicators"
 
GB / T 4959 "hall sound reinforcement characteristics of the measurement method"
 
GB / T 50311-2000 "Building and building complex wiring engineering system design specifications"
 
GJG / T16-92 "Code for Electrical Design of Civil Buildings"
 
GB / T50314-2000 "intelligent building design standards"
 
GB / T 16851-1997 "Emergency sound system"
 
GB 50116-98 "People's Republic of China Ministry of Public Security fire alarm system design specifications"
 
B, engineering equipment / craft / safety class
 
GB 1982 "audio power amplifier (amplifiers) basic parameters and general technical conditions"
 
GB / T 9384 "Environmental test and test method for audio power amplifiers"
 
SJ / T10666 "Surface Assembly Components Solder Joint Quality Assessment"
 
GB / T 2423 "Environmental testing of electrical and electronic products"
 
C, construction acceptance management class
 
GBT / T 50312-2000 "building and building complex wiring system engineering acceptance"
 
GBJ 232-92 "electrical installation installation and acceptance of norms"
 
GB50303-2002 "Construction electrical engineering construction quality acceptance"
 
DB32 / 366-1999 "building intelligent system engineering implementation and acceptance of norms"
 
GB 50166-92 "fire automatic alarm system construction and acceptance of norms"
 
D, integrated wiring / wire category
 
GB / T2951-1997 "Common test method for cable insulation and sheathing materials"
 
ISO / IECll801 "customer building general wiring system information technology international standards"
 
EIA / TIA568A "commercial building communication building wiring standards"
 
EIA / TIA570 "residential and small business district integrated wiring standards"

(2) stability and reliability
 
Modern public address system requires both to play sound music, but also for business promotion and paging broadcast, but also as a fire accident emergency broadcast, many uses together, so the system R & D and design must have high stability and high reliability. In order to ensure the reasonable return of the investor and the image of the model project, the whole system fully considers the stability of the equipment in any environment, especially in the emergency situation. In the equipment selection and system design, it avoids the occurrence of the fault and the system subversion. All the major emergency equipment , Such as strong cut, emergency trigger, the main standby switch, standby power supply equipment, are in accordance with the above specifications / standards design and production, and made all kinds of national certification, while providing manufacturers authorized certificate, and commitment to the provision of engineering equipment, technology Support and after-sales service, etc. to give full support.

(3) advanced and intelligent
 
With the complex construction of various modern buildings and a large number of indoor and outdoor places, users of public broadcasting system function diversification, integration and intelligent requirements are getting higher and higher, RH-AUDIO (Ruijang) network public broadcasting system Information source digital processing, integrated integrated control, multi-point interactive controllable, IP network control, embedded software, CNC / audio signal remote transmission, industrial design seven core areas have independent intellectual property rights for all kinds of complex requirements The project provides the most advanced and intelligent solution, so that Party A can choose the most suitable system according to the different requirements of the project, and build a flexible solution, so as to create the highest ＆#118alue for the investors and the use of ＆#118alue commercial ＆#118alue.

(4) easy to operate and friendly interface
 
Modern public address system functions, especially in the face of large-scale broadcasting system is to let the average user in the operation and use of more difficult. RH-AUDIO (public) in the product development phase of the user will be easy to learn as a guiding ideology, extensive use of monolithic and embedded technology, standing on the user's point of view, in the user interface design to fully consider the user's habits, so Making the whole system easy to learn and use, the general user in the face of the user interface as long as a little familiar with the skilled operation.
 
(5) cost-effective
 
Modern public address systems generally require equipment to be cost-effective to ensure that the system can be used for a long period of stable use and protection of investors a reasonable return, it requires a limited control of investment within the scope of not only fully meet the system functions, and must With the high stability, the RH-AUDIO public address system has been following this principle from R & D / manufacturing to pricing. This ensures that the design has the best cost performance.

Selection principle
 
Through the understanding and investigation of many public broadcasting products on the market, the objective analysis and comparison of quality, price, R & D / manufacturing level, technical support, after-sales service, factory comprehensive strength, brand awareness and so on are carried out. Customers choose the most suitable public address system - RH-AUDIO (Reich) radio system.
 
(1) Transmission:
 
The audio output power of the system adopts constant voltage audio cable transmission mode. Requirements for line attenuation: In the public address system, the line attenuation from the output of the amplifier to the farthest user speaker on the line should meet the following requirements: Broadcast no more than 2 dB (1 kHz), with constant pressure output Feed line, the output voltage is 70V or 100V.

(2) speaker settings and selection:
 
In principle, depending on the environment selection of different varieties of broadcast speakers, and the entire system match. The number of speakers depends on the layout and sound pressure level size requirements, in the auditory area should be able to hear the same loudness and the same clarity of the sound. Any loudspeaker output the maximum volume should not exceed 80db, nor less than 10db, should be at least higher than the noise floor of the external noise level. The choice of broadcast loudspeaker location should be realistic, in principle, in a uniform, decentralized manner in the broadcast service area, the degree of dispersion should ensure that the service area of ＆#8203;＆#8203;the signal to noise ratio of not less than 15db, and should ensure that the audience at least included in a speaker Of the sound radiation area.
 
Background music radio and fire emergency broadcast sharing the same set of speakers, must also meet the "People's Republic of China Ministry of Public Security fire alarm system design specifications" (Excerpt, GB50116-98) June 1, 1999 implementation) in the "5.4.2" , That is, fire emergency broadcast loudspeaker settings, should meet the following requirements:
 
A, civil buildings within the speaker should be set in the aisle and hall and other public places. The rated power of each loudspeaker shall not be less than 3W and shall be such that the distance from any part of a fire zone to a nearest loudspeaker is not greater than 25 m and the distance from the last speaker to the end of the aisle shall not be greater than 12.5 m.
 
B, in the ambient noise is greater than 60dB set the speaker, in its playback range farthest point sound pressure level should be higher than the background noise of 15dB.

Design and description of public address system
 
the advantages of network radio is two aspects, 1, program advantages, 2, technical performance advantages.
 
Advantages:
 
1, Webcast with the rational use of existing local area network, so that the implementation of webcasts more simple and effective. Reduce the wiring and labor costs, and the system is more flexible and convenient.
 
2, network broadcasting system to reduce the difficulty of the implementation of distributed layout, reducing the engine room load, no longer because the engine room power load is too large to consider carrying high-power equipment, electricity problems;
 
3, network radio system control center and radio sub-control center can also be arranged according to the actual situation in any need, as long as the network is smooth;
 
4, network public address system installation and debugging simple and quick, whether it is the construction of commissioning personnel or system operators,  network public broadcasting at the beginning of the design have done a humane design, Installation and operation are simple and convenient.

Design and description of public address system
Technical performance advantages:
 
1, network public address of the operating system is used in embedded systems, all embedded hardware to ensure the stability of the system reliability.
 
2, network public address system network delay is small, can achieve live broadcast synchronous call and music player, more suitable for more live music broadcasting and call requirements, regardless of music playback and broadcast voice calls, can Provide high quality sound quality. The system provides lossless CD quality and high quality compressed sound quality 2.
 
3, network public broadcasting system network equipment are interactive stackable architecture, can achieve the most simple system, you can also achieve the most complex broadcast requirements of the system.
 
4, network public broadcasting system perfect fire alarm function, with the fire system linkage, the network alarm matrix to provide fire drill function to ensure maximum fire safety. A variety of RH-AUDIO (Ruijie) equipment model provides a number of linkage interface: 24V, short-circuit signal, 485 signal to meet the various requirements of the use of functional requirements.

5, the server and network software RH-AUDIO (Ruijie) network public broadcasting system, the best technical performance can be separated from the central server with the network broadcast software to run alone, even if the center to stop working or because the equipment problem can not work, the rest of our network equipment Are not affected by it, still broadcast and play background music.
 
6, WEB management: the user can log directly through the browser to manage the entire network broadcast system, without the need to install any software, suitable for administrators in any location on the network radio system management (programming, , Password modification, manual control playback, etc.). Administrators can use any computer over the network to make volume adjustments to a single terminal device or simultaneously to multiple terminal devices, play audio files, and so on.

Fourth, the hotel IP network background music system and fire alarm broadcast equipment list: