Campus digital broadcasting system

Abstract

The utility model discloses a campus digital broadcasting system, which comprises a broadcasting input module, a monitoring module, a broadcasting output module and a wireless network module, the broadcast input module comprises a broadcast microphone, a first sound console, a first audio collector, a preamplifier and a network broadcast host, the broadcast microphone is connected with the first sound console, the first audio collector is respectively connected with the first sound console and the preamplifier, and the preamplifier is connected with the network broadcast host; the monitoring module comprises an antenna unit, a second sound console, a second audio collector, a first IP network power amplifier and a first sound post; the broadcast output module comprises an indoor broadcast unit and an outdoor broadcast unit, and the indoor broadcast unit and the outdoor broadcast unit are in communication connection with the network broadcast host through the wireless network module. The method can improve the timeliness and definition of audio broadcasting, and can be widely applied to the technical field of broadcasting.

Description

Technical Field

[0001] This utility model relates to the field of broadcasting technology, and in particular to a campus digital broadcasting system. Background Technology

[0002] The main functions of the campus broadcasting system are to play background music, release emergency information or notices, broadcast news, paging, play eye exercises, play gymnastics music, ring bells for the start and end of classes, and broadcast speeches by school leaders. When necessary, it can also forcibly issue disaster warnings, conduct on-site command and evacuation, and play regular broadcast programs, such as broadcast gymnastics, ring bells for the start and end of classes, and play music during and after classes.

[0003] Therefore, ensuring the timeliness and clarity of broadcasts from the campus broadcasting system is crucial; otherwise, it will disrupt normal school operations and learning. Currently, the campus broadcasting system suffers from poor timeliness and clarity in its audio broadcasts, making it difficult to meet the needs of broadcasts requiring high timeliness and clarity. Utility Model Content

[0004] In view of this, the purpose of this utility model embodiment is to provide a campus digital broadcasting system that can improve the timeliness and clarity of the campus broadcasting system when broadcasting audio, and meet the broadcasting needs with high timeliness and clarity requirements.

[0005] This utility model embodiment provides a campus digital broadcasting system, including a broadcast input module installed in the broadcasting room, a monitoring module installed in the monitoring room, a broadcast output module installed in the teaching area, and a wireless network module;

[0006] The broadcast input module includes a broadcast microphone, a first mixing console, a first audio acquisition unit, a preamplifier, and a network broadcast host. The broadcast microphone is connected to the first mixing console, the first audio acquisition unit is connected to both the first mixing console and the preamplifier, and the preamplifier is connected to the network broadcast host.

[0007] The monitoring module includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network power amplifier, and a first speaker column. The antenna unit is connected to the second mixing console, the second audio acquisition unit is connected to both the second mixing console and the first IP network power amplifier, and the first speaker column is connected to the first IP network power amplifier.

[0008] The broadcast output module includes an indoor broadcast unit and an outdoor broadcast unit, both of which are connected to the network broadcast host via the wireless network module.

[0009] Optionally, both the first audio acquisition unit and the second audio acquisition unit are equipped with an ADS127L11 chip and a temperature-controlled crystal oscillator.

[0010] Optionally, both the first audio acquisition device and the second audio acquisition device are equipped with independent power supplies.

[0011] Optionally, the broadcast input module further includes a CD player, a public address workstation, a first network broadcast paging station, and an IP network speaker. The CD player is connected to the first audio acquisition unit, and the IP network speaker, the public address workstation, and the first network broadcast paging station are all connected to the network broadcast host through the wireless network module.

[0012] Optionally, the broadcast input module further includes a broadcast surge arrester, a network program timer, a 16-channel power sequencer, and a fire signal collector. The broadcast surge arrester is connected to the first audio collector and the network broadcast host respectively. The network program timer is connected to the network broadcast host. The 16-channel power sequencer is connected to the public broadcast workstation. The fire signal collector communicates with the broadcast host through the wireless network module.

[0013] Optionally, the antenna unit includes a directional antenna and an antenna distributor, the directional antenna being connected to the antenna distributor, and the antenna distributor being connected to the second mixing console.

[0014] Optionally, the monitoring module further includes a suppressor, an IP terminal, and a second network broadcast paging station. The suppressor is connected to the second mixing console, and the IP terminal and the second network broadcast paging station are communicatively connected to the broadcast host through the wireless network module.

[0015] Optionally, the indoor broadcasting unit includes a third IP network amplifier and a wall-mounted speaker. The third IP network amplifier is communicatively connected to the broadcasting host through the wireless network module, and the wall-mounted speaker is connected to the third IP network amplifier. The outdoor broadcasting unit includes a second IP network amplifier and a second speaker column. The second IP network amplifier is communicatively connected to the broadcasting host through the wireless network module, and the second speaker column is connected to the second IP network amplifier.

[0016] Optionally, half the power of the second IP network power amplifier is equal to the power of the third IP network power amplifier.

[0017] Optionally, the campus digital broadcasting system also includes a third network broadcast paging station located in the guardhouse.

[0018] The implementation of this utility model embodiment has the following beneficial effects: This utility model embodiment provides a campus digital broadcasting system, including a broadcast input module installed in the broadcasting room, a monitoring module installed in the monitoring room, a broadcast output module installed in the teaching area, and a wireless network module; the broadcast input module includes a broadcast microphone, a first mixing console, a first audio acquisition unit, a preamplifier, and a network broadcasting host, the broadcast microphone is connected to the first mixing console, the first audio acquisition unit is connected to both the first mixing console and the preamplifier, and the preamplifier is connected to the network broadcasting host; the monitoring module includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network power amplifier, and a first speaker column, the antenna unit is connected to the second mixing console, the second audio acquisition unit is connected to both the second mixing console and the first IP network power amplifier, and the first speaker column is connected to the first IP network power amplifier; the broadcast output module includes an indoor broadcasting unit and an outdoor broadcasting unit, both of which are communicatively connected to the network broadcasting host through the wireless network module. The timely acquisition and processing of audio signals by the first and second audio acquisition units improves the timeliness of audio broadcasting; the optimization of the audio signal input to the broadcast host by the preamplifier ensures the quality of the audio signal, thereby improving the clarity of the audio broadcast. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of a campus digital broadcasting system provided in an embodiment of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0022] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] Reference Figure 1 This utility model provides a campus digital broadcasting system, including a broadcast input module installed in the broadcasting room, a monitoring module installed in the monitoring room, a broadcast output module installed in the teaching area, and a wireless network module.

[0024] The broadcast input module includes a broadcast microphone, a first mixing console, a first audio acquisition unit, a preamplifier, and a network broadcast host. The broadcast microphone is connected to the first mixing console, the first audio acquisition unit is connected to both the first mixing console and the preamplifier, and the preamplifier is connected to the network broadcast host.

[0025] The monitoring module includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network power amplifier, and a first speaker column. The antenna unit is connected to the second mixing console, the second audio acquisition unit is connected to both the second mixing console and the first IP network power amplifier, and the first speaker column is connected to the first IP network power amplifier.

[0026] The broadcast output module includes an indoor broadcast unit and an outdoor broadcast unit, both of which are connected to the network broadcast host via the wireless network module.

[0027] Specifically, the campus digital broadcasting system's broadcast input module is located in the broadcasting room. This module consists of a broadcast microphone, a primary mixing console, a primary audio acquisition unit, a preamplifier, and a network broadcasting host. The broadcast microphone, acting as the sound input source, is connected to the primary mixing console for initial sound signal processing and adjustment. The primary audio acquisition unit is connected to both the primary mixing console and the preamplifier, acquiring the processed audio signal and transmitting it to the preamplifier for amplification. The primary audio acquisition unit has the function of timely acquisition and processing of audio signals. The preamplifier is connected to the network broadcasting host, where the amplified audio signal is input for subsequent encoding, storage, or further processing.

[0028] The monitoring module located in the monitoring room includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network amplifier, and a first speaker column. The antenna unit receives specific signals (such as wireless audio signals) and transmits them to the second mixing console for signal adjustment and processing. The second audio acquisition unit is connected to both the second mixing console and the first IP network amplifier, acquiring the processed audio signal and transmitting it to the first IP network amplifier. The first speaker column is connected to the first IP network amplifier, which amplifies the audio signal and drives the first speaker column to produce sound, thus playing the audio.

[0029] The first and second audio acquisition units have the same structure and function, and both include the following features: 1. Support for DHCP or manual IP address setting, and support for common network protocols such as TCP / IP, UDP, and IGMP; 2. The device can manually or periodically set get out of class bells, exam bells, and playback of various audio files. In case of broadcast conflicts, it automatically plays the broadcast with higher priority. Broadcast expansion can be achieved directly using the existing campus network without modifying the school network; 3. Integrated local audio input, local audio output, network, and USB control interfaces; 4. Equipped with one intelligent power output interface, supporting intelligent management of connected power devices (such as amplifiers, audio processors, and powered speakers); 5. Support for normal playback of pre-set get out of class bells, exam bells, and audio files even in the event of network outages or server failures; 6. Support for real-time terminal status monitoring and management via browser and mobile app; 7. Support for remote fault diagnosis, log recording, and remote upgrades; 8. Support for built-in WEB operation control page. 9. Supports lossless formats such as WAV and FLAC, and also supports MP3 and AAC; 10. Supports simultaneous use on the Internet and LAN; 11. Supports intelligent management of 24V power output; 12. Supports short-circuit signal control; 13. Comes with an MP3 player and a USB port for local program playback; 14. Supports linkage with front-end devices such as face recognition access control hosts or IP cameras to trigger the device to play corresponding audio and video files; 15. Built-in 4G memory; 16. Supports independent FM radio reception; 17. Supports Bluetooth parameter settings and Bluetooth music playback, significantly improving operation and maintenance efficiency and reducing construction and maintenance difficulty.

[0030] External interfaces: 1. 220V AC input; 2. USB flash drive input; 3. 24V signal control output; 4. High-quality piano lacquer panel, LCD screen, displaying device status, IP information, and real-time device information; 6. 100M network port; 7. Microphone interface; 8. Audio input and output RCA interfaces; 9. Audio adjustment; 10. 100V constant voltage broadcast audio amplifier input for college entrance examination backup; 11. Short circuit signal output; 12. Supports 10A, 220V power output.

[0031] The broadcast output module, located in the teaching area, includes indoor and outdoor broadcast units. Both units communicate with the network broadcast host via a wireless network module. The network broadcast host sends the processed audio signal to the indoor and outdoor broadcast units via the wireless network module. The indoor and outdoor broadcast units then receive and play the audio signal, thus enabling sound broadcasting within the teaching area.

[0032] In some optional embodiments, both the first audio acquisition unit and the second audio acquisition unit are equipped with an ADS127L11 chip and a temperature-controlled crystal oscillator.

[0033] Specifically, the ADS127L11 chip is a high-precision analog-to-digital converter (ADC) chip used for audio acquisition. It converts analog audio signals into digital signals for subsequent digital signal processing and transmission. Incorporating this chip in both the first and second audio acquisition units ensures high accuracy and fidelity in the acquired audio signals, accurately reproducing the details and characteristics of the original audio signal. A temperature-controlled crystal oscillator (TCO) provides a stable clock signal; during audio acquisition, a stable clock signal is crucial for ensuring the accuracy and timeliness of the sampling frequency. By using a TCO, both the first and second audio acquisition units can obtain a stable clock signal, thereby ensuring the accuracy and timeliness of audio sampling and avoiding problems such as audio distortion, sampling delay, or sampling errors caused by unstable clock signals.

[0034] In some alternative embodiments, both the first audio acquisition unit and the second audio acquisition unit are provided with independent power supplies.

[0035] Specifically, independent power supplies ensure that the first and second audio acquisition units are unaffected by the power consumption of other devices, significantly improving the quality of the audio signals acquired, system stability, and anti-interference capabilities. For example, when other equipment in the monitoring room (such as the second mixing console and the first IP network amplifier) ​​experiences power fluctuations (such as instantaneous current surges or voltage instability), the independent power supplies of the first and second audio acquisition units can guarantee the stability of their own power supply, ensuring the normal operation of audio acquisition.

[0036] When the power supply to the first audio acquisition unit fails (such as a damaged power module or abnormal voltage), because it has an independent power supply, it will not affect the normal power supply and operation of the second audio acquisition unit and other audio devices, and vice versa. This helps to quickly locate and resolve power-related problems, while also reducing the impact of the failure on the entire audio acquisition system.

[0037] Independent power supplies can be designed and configured to meet the specific needs of the first and second audio acquisition units. For example, based on the power supply requirements of the ADS127L11 chip, appropriate voltage and current can be provided to each audio acquisition unit to ensure that the chip operates in optimal condition, thereby improving the quality of audio acquisition.

[0038] Independent power supplies provide greater flexibility for both the first and second audio acquisition units during system upgrades or expansions. The power supply for a single audio acquisition unit can be adjusted or replaced to meet new needs without affecting other devices. For example, when the performance of a particular audio acquisition unit needs improvement, a more advanced power module can be installed to meet higher power requirements without requiring extensive modifications to the entire system's power supply.

[0039] In some optional embodiments, the broadcast input module further includes a CD player, a public address workstation, a first network broadcast paging station, and an IP network speaker. The CD player is connected to the first audio acquisition unit, and the IP network speaker, the public address workstation, and the first network broadcast paging station are all communicatively connected to the network broadcast host through the wireless network module.

[0040] Specifically, the CD player connects to the first audio acquisition unit to play the audio content stored on the CD. The CD player reads the audio data from the CD, converts it into analog audio signals, and then, through its connection with the first audio acquisition unit, enables these audio signals to enter the entire broadcast system. For example, in scenarios requiring the playback of specific music or audio content, such as school recess music or background music in a shopping mall, the CD player can play pre-recorded CD audio, which is then broadcast through the broadcast system.

[0041] The public address workstation communicates with the network broadcast host via a wireless network module. As one of the control centers of the entire broadcast system, the workstation can configure, manage, and monitor the system. Staff can set broadcast playback schedules on the workstation, such as playing specific audio content at set times, or controlling broadcast playback based on different time periods or areas. Furthermore, it can monitor the status of the broadcast system's equipment, such as the operational status of various audio acquisition units and power amplifiers, to promptly identify and resolve problems.

[0042] The first network broadcast paging station also communicates with the network broadcast host via a wireless network module. It is used to implement real-time voice broadcasting. For example, in a school's campus broadcasting system, administrators can use the first network broadcast paging station to send voice notifications, emergency broadcasts, etc., to the entire school, a specific grade, or a specific area. It provides convenient voice input and broadcasting functions, meeting the real-time voice communication needs in different scenarios.

[0043] IP network speakers serve as output devices for broadcasting systems, connecting to the network broadcasting host via a wireless network module. The IP network speaker receives digital audio signals from the network broadcasting host, converts them into analog audio signals, amplifies them, and then plays them out.

[0044] In some optional embodiments, the broadcast input module further includes a broadcast surge arrester, a network program timer, a 16-channel power sequencer, and a fire signal collector. The broadcast surge arrester is connected to the first audio collector and the network broadcast host, respectively. The network program timer is connected to the network broadcast host. The 16-channel power sequencer is connected to the public broadcast workstation. The fire signal collector communicates with the broadcast host through the wireless network module.

[0045] Specifically, the broadcast surge arrester is connected to both the primary audio acquisition unit and the network broadcast host. Its main function is to protect these two important devices from overvoltage damage caused by lightning strikes. During thunderstorms, lightning can generate instantaneous high voltage and large current. If these abnormal surges directly affect the primary audio acquisition unit and the network broadcast host, they could potentially damage the delicate internal circuitry, causing the devices to malfunction. The broadcast surge arrester can quickly divert excess current to the ground upon detecting an overvoltage, thereby ensuring the safe and stable operation of the primary audio acquisition unit and the network broadcast host.

[0046] The network program timer connects to the network broadcast host, allowing users to preset the playback time and order of broadcast programs. Through the network program timer, users can flexibly arrange the playback of broadcast content according to different needs and scenarios. For example, it can be set to play a reveille at 7:00 AM every morning, play relaxing music during breaks between classes, and play a notification tone at the end of the school day. This enables automated playback of the broadcast system and improves the efficiency of broadcast management.

[0047] The 16-channel power sequencer connects to the public address system workstation and is primarily used to control the power switching sequence of the workstation and related equipment. When the broadcast system starts up, turning on the equipment power in a specific order avoids the large current surge that occurs when equipment starts up simultaneously, protecting electrical components and extending equipment lifespan. Similarly, turning off the power in the reverse order when shutting down the broadcast system also contributes to the safe and stable operation of the equipment.

[0048] The fire signal acquisition device communicates with the broadcast host via a wireless network module. Its main function is to collect fire signals in real time, such as fire alarm signals. In the event of an emergency such as a fire, the fire signal acquisition device will quickly transmit the signal to the broadcast host. The broadcast host can then immediately switch to emergency broadcast mode according to a preset program, playing pre-recorded fire evacuation prompts and guidance voices to help people evacuate quickly and orderly. Specifically, the fire signal acquisition device collects temperature information from temperature sensors and smoke information from smoke sensors installed throughout the campus. After processing the collected temperature and smoke information, it generates corresponding fire information and sends it to the broadcast host for further processing.

[0049] In some alternative embodiments, the antenna unit includes a directional antenna and an antenna distributor, the directional antenna being connected to the antenna distributor, and the antenna distributor being connected to the second mixing console.

[0050] Specifically, a directional antenna can focus on receiving or transmitting signals in a specific direction. In the monitoring module of a broadcast system, directional antennas are mainly used to selectively receive signals from specific sources. For example, when it is necessary to receive audio signals from a specific area (such as signals emitted by a wireless audio transmitter in a specific location), a directional antenna can adjust its pointing angle to focus on receiving signals in that direction, thereby improving signal reception sensitivity and anti-interference capability. Compared to omnidirectional antennas, directional antennas can more effectively receive weak signals from long distances or specific directions, and reduce interference signals from other directions.

[0051] An antenna distributor connects to a directional antenna and a second mixing console, distributing and processing the signal received by the directional antenna. The antenna distributor can split a single input signal into multiple output signals and adjust parameters such as signal strength and phase according to actual needs. In broadcast systems, the antenna distributor can distribute the signal received by the directional antenna to the second mixing console for further processing, such as signal amplification and adjustment. Simultaneously, the antenna distributor can also achieve signal isolation and impedance matching, ensuring the stability and reliability of the signal during transmission.

[0052] In some optional embodiments, the monitoring module further includes a suppressor, an IP terminal, and a second network broadcast paging station. The suppressor is connected to the second mixing console, and the IP terminal and the second network broadcast paging station are communicatively connected to the broadcast host through the wireless network module.

[0053] Specifically, the suppressor connects to the second mixing console and is primarily used to process noise, interference signals, and abnormal signals that may cause audio distortion in the audio signal. It can automatically detect noise frequency bands in the audio signal and suppress this noise through filtering and noise reduction. For example, when there is noise in the audio signal caused by factors such as equipment electromagnetic interference and environmental noise, the suppressor can effectively filter this noise, ensuring the quality of the audio signal input to the second mixing console. Simultaneously, the suppressor can also process feedback signals in the audio signal, avoiding problems such as howling caused by feedback and ensuring the stable operation of the broadcast system.

[0054] IP terminals communicate with the broadcast host via a wireless network module and are crucial devices in broadcast systems for receiving and playing audio signals. They receive digital audio signals from the broadcast host, decode and amplify them, and then output them to appropriate audio devices (such as speakers) for playback. IP terminals also support audio signal control, such as volume adjustment and playback mode switching. Furthermore, IP terminals can control audio playback in different areas according to instructions from the broadcast host. For example, in a school's campus broadcasting system, IP terminals can play different audio content based on the needs of different classrooms, playgrounds, and other areas.

[0055] The second network broadcast paging station also communicates with the broadcast host via a wireless network module, primarily for real-time voice broadcasting and paging functions. Staff can send voice messages to specific areas or the entire broadcast system through the second network broadcast paging station. The second network broadcast paging station provides convenient voice input interfaces, such as microphone jacks, allowing staff to broadcast voice messages using microphones. Simultaneously, the second network broadcast paging station also supports operations such as selecting broadcast areas and adjusting volume, meeting paging and broadcasting needs in different scenarios.

[0056] In some optional embodiments, the indoor broadcasting unit includes a third IP network amplifier and a wall-mounted speaker. The third IP network amplifier is communicatively connected to the broadcasting host through the wireless network module, and the wall-mounted speaker is connected to the third IP network amplifier. The outdoor broadcasting unit includes a second IP network amplifier and a second speaker column. The second IP network amplifier is communicatively connected to the broadcasting host through the wireless network module, and the second speaker column is connected to the second IP network amplifier.

[0057] Specifically, as the power amplification device for the indoor broadcasting unit, the third-party IP network amplifier communicates with the broadcasting host via a wireless network module, receiving digital audio signals from the host. It decodes and amplifies the digital audio signals to a power level sufficient to drive the wall-mounted speakers normally. Simultaneously, the third-party IP network amplifier can adjust parameters such as volume and tone of the audio signal to adapt to the broadcasting needs of different indoor environments. The wall-mounted speakers connect to the third-party IP network amplifier, receive the amplified audio signals, and convert them into sound for playback. Wall-mounted speakers are easy to install, do not occupy much space, and can evenly diffuse sound throughout the room, ensuring that people in all locations can clearly hear the broadcast content.

[0058] Similar to the third IP network amplifier, the second IP network amplifier communicates with the broadcast host via a wireless network module to receive digital audio signals. Due to the relatively complex outdoor environment, the long sound propagation distance, and potential interference, the second IP network amplifier typically needs a higher power output capability to ensure the audio signal can cover a larger outdoor area. Simultaneously, it can also perform necessary processing and adjustment of the audio signal. The second speaker column connects to the second IP network amplifier, converting the amplified audio signal into sound. The speaker column consists of multiple speakers, possessing strong directivity and good sound coverage, effectively propagating sound in outdoor environments. The speaker column is waterproof, preventing rainwater erosion of the interior; it can be adjusted according to different installation methods and angles to better cover the target area.

[0059] The broadcast host sends the processed audio signal to the third and second IP network amplifiers via a wireless network module. The third and second IP network amplifiers decode and amplify the received audio signal, respectively, before transmitting the amplified signal to the wall-mounted speakers and second column speakers. The wall-mounted speakers and second column speakers convert the electrical signal into a sound signal, enabling indoor and outdoor broadcasting. In this way, the entire broadcast output module can accurately and clearly transmit the broadcast content to the appropriate area according to different environments and needs.

[0060] In some alternative embodiments, half the power of the second IP network amplifier is equal to the power of the third IP network amplifier.

[0061] Specifically, the third IP network amplifier drives the wall-mounted speakers, and its power determines the volume and quality of the sound they can produce. Since wall-mounted speakers are typically installed in relatively small indoor spaces, the power of the third IP network amplifier only needs to meet the requirements for sound coverage and sound quality in the indoor environment. The second IP network amplifier drives the second column speaker, and its power is twice that of the third IP network amplifier. Because outdoor environments are relatively open, sound propagation is easily affected by external factors (such as distance and ambient noise), requiring a more powerful amplifier to ensure that the sound can travel a greater distance while maintaining a certain volume and sound quality. Driven by the second IP network amplifier, the second column speaker can achieve effective sound coverage in outdoor locations such as playgrounds and squares, for example, for broadcasting sports commentary and announcing large events.

[0062] In some optional embodiments, the wall-mounted speaker to the third IP network amplifier uses RVVP2x1.5 (shielded twisted-pair control cable. The letters represent: R, flexible conductor (multi-strand fine copper wire twisted together, more flexible than single-strand wire); V, polyvinyl chloride (PVC) insulation layer; V, polyvinyl chloride (PVC) outer sheath; P, shielding layer (usually copper wire braid or aluminum foil shielding); 2×1.5, 2-core cable, each conductor with a cross-sectional area of ​​1.5 mm². 2 Speaker wire connection. Other audio equipment uses RVVP3x0.5 (R: soft core conductor; V: PVC insulation; V: PVC outer sheath; P: shielding layer; 2×1.5, 3-core cable, each conductor cross-sectional area 0.5mm²). 2 Audio is transmitted via a cable.

[0063] In some alternative embodiments, the campus digital broadcasting system also includes a third network broadcast paging station located in the guardhouse.

[0064] Specifically, in the event of an emergency on campus, such as a fire, earthquake, or other disaster, or a security incident involving unauthorized entry, the security guards can quickly issue emergency notices to all faculty and students via a third-party network broadcasting and paging station. For example, they can inform students and faculty to evacuate along the designated evacuation routes or remind them to be cautious and avoid dangerous areas. This timely notification effectively improves campus safety management and protects the lives of faculty and students.

[0065] In daily management, gatekeepers can use the third-party network paging system to provide safety reminders. For example, they can remind students to be aware of traffic safety on campus and avoid playing or running around on the roads; or inform teachers and students of safety precautions during specific time periods, such as safety precautions after evening self-study. When visitors enter the campus, gatekeepers can use the third-party network paging system to guide them to designated locations. For example, they can instruct visitors to go to the reception area or relevant offices, while also providing information about the basic layout and routes of the campus to help visitors find their destination. The gatekeepers can also use the third-party network paging system to convey visitor-related information to all teachers and students. For example, they can notify parents of a particular class who have arrived at the gatekeeper's office, or inform teachers and students that an important visitor has arrived, ensuring timely and accurate information transmission within the campus.

[0066] The implementation of this utility model embodiment has the following beneficial effects: This utility model embodiment provides a campus digital broadcasting system, including a broadcast input module installed in the broadcasting room, a monitoring module installed in the monitoring room, a broadcast output module installed in the teaching area, and a wireless network module; the broadcast input module includes a broadcast microphone, a first mixing console, a first audio acquisition unit, a preamplifier, and a network broadcasting host, the broadcast microphone is connected to the first mixing console, the first audio acquisition unit is connected to both the first mixing console and the preamplifier, and the preamplifier is connected to the network broadcasting host; the monitoring module includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network power amplifier, and a first speaker column, the antenna unit is connected to the second mixing console, the second audio acquisition unit is connected to both the second mixing console and the first IP network power amplifier, and the first speaker column is connected to the first IP network power amplifier; the broadcast output module includes an indoor broadcasting unit and an outdoor broadcasting unit, both of which are communicatively connected to the network broadcasting host through the wireless network module. The timely acquisition and processing of audio signals by the first and second audio acquisition units improves the timeliness of audio broadcasting; the optimization of the audio signal input to the broadcast host by the preamplifier ensures the quality of the audio signal, thereby improving the clarity of the audio broadcast.

[0067] In this specification, the reference to the term "in a particular embodiment" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A campus digital broadcasting system, characterized in that, This includes a broadcast input module installed in the broadcasting room, a monitoring module installed in the monitoring room, a broadcast output module installed in the teaching area, and a wireless network module. The broadcast input module includes a broadcast microphone, a first mixing console, a first audio acquisition unit, a preamplifier, and a network broadcast host. The broadcast microphone is connected to the first mixing console, the first audio acquisition unit is connected to both the first mixing console and the preamplifier, and the preamplifier is connected to the network broadcast host. The monitoring module includes an antenna unit, a second mixing console, a second audio acquisition unit, a first IP network power amplifier, and a first speaker column. The antenna unit is connected to the second mixing console, the second audio acquisition unit is connected to both the second mixing console and the first IP network power amplifier, and the first speaker column is connected to the first IP network power amplifier. The broadcast output module includes an indoor broadcast unit and an outdoor broadcast unit, both of which are connected to the network broadcast host via the wireless network module.

2. The campus digital broadcasting system according to claim 1, characterized in that, Both the first audio acquisition device and the second audio acquisition device are equipped with an ADS127L11 chip and a temperature-controlled crystal oscillator.

3. The campus digital broadcasting system according to claim 2, characterized in that, Both the first audio acquisition device and the second audio acquisition device are equipped with independent power supplies.

4. The campus digital broadcasting system according to claim 1, characterized in that, The broadcast input module also includes a CD player, a public address workstation, a first network broadcast paging station, and an IP network speaker. The CD player is connected to the first audio acquisition unit, and the IP network speaker, the public address workstation, and the first network broadcast paging station are all connected to the network broadcast host through the wireless network module.

5. The campus digital broadcasting system according to claim 4, characterized in that, The broadcast input module also includes a broadcast surge arrester, a network program timer, a 16-channel power sequencer, and a fire signal collector. The broadcast surge arrester is connected to the first audio collector and the network broadcast host respectively. The network program timer is connected to the network broadcast host. The 16-channel power sequencer is connected to the public broadcast workstation. The fire signal collector communicates with the broadcast host through the wireless network module.

6. The campus digital broadcasting system according to claim 1, characterized in that, The antenna unit includes a directional antenna and an antenna distributor, the directional antenna being connected to the antenna distributor, and the antenna distributor being connected to the second mixing console.

7. The campus digital broadcasting system according to claim 1, characterized in that, The monitoring module also includes a suppressor, an IP terminal, and a second network broadcast paging station. The suppressor is connected to the second mixing console, and the IP terminal and the second network broadcast paging station are connected to the broadcast host through the wireless network module.

8. The campus digital broadcasting system according to claim 1, characterized in that, The indoor broadcasting unit includes a third IP network amplifier and a wall-mounted speaker. The third IP network amplifier is connected to the broadcasting host via the wireless network module, and the wall-mounted speaker is connected to the third IP network amplifier. The outdoor broadcasting unit includes a second IP network amplifier and a second speaker column. The second IP network amplifier is connected to the broadcasting host via the wireless network module, and the second speaker column is connected to the second IP network amplifier.

9. The campus digital broadcasting system according to claim 8, characterized in that, Half the power of the second IP network power amplifier is equal to the power of the third IP network power amplifier.

10. The campus digital broadcasting system according to any one of claims 1-9, characterized in that, The campus digital broadcasting system also includes a third network broadcasting paging station located in the guardhouse.

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