Integrated fiber-optic switch ip digital power amplifier

Abstract

The utility model relates to audio frequency equipment technical field, concretely, IP digital power amplifier of integrated optical fiber switch is provided. It includes power unit, network control board, optical fiber switch unit, main power amplifier module, spare power amplifier module and output regulation unit. The utility model discloses through the integration of optical fiber switch unit and power amplifier, saves the independent network switch, reduces equipment investment and system wiring complexity, and the main power amplifier module and spare power amplifier module cooperate the automatic switching function of network control board's fault, combines optical fiber switch unit double network mode and cache mechanism, ensures that audio signal continuous output is not interrupted, and the impedance detection of network control board and the LED state indication of output regulation unit realize the quick positioning and intelligent management of fault, four channel design and network cascade function adapt to the demand of multi-scene partition broadcast and extension, and the overall reliability, maintainability and flexibility of system are improved.

Description

Technical Field

[0001] This utility model relates to the field of audio equipment technology, and more specifically, to an IP digital power amplifier integrated with a fiber optic switch. Background Technology

[0002] Railway stations generally use digital broadcasting systems for information dissemination, order maintenance, and passenger flow guidance. The core equipment in the digital broadcasting system, IP digital power amplifiers and network switches, are usually independent devices, and the digital power amplifiers and network switches communicate with each other via network.

[0003] Currently, the core equipment in digital broadcasting systems, IP digital power amplifiers and network switches, adopt a separate structure. When multiple power amplifiers are connected to the network switch at the same time, especially when dual network port backup is required, the investment in network switch equipment is large and the operating cost is high. When the external network is a fiber optic signal input, it is necessary to connect to the fiber optic switch first and then connect the IP digital power amplifier, which increases the equipment connection links. When multiple IP digital power amplifiers are used, each one needs to be connected to the network switch, which is relatively cumbersome. Therefore, we propose an IP digital power amplifier that integrates a fiber optic switch. Utility Model Content

[0004] The purpose of this invention is to provide an IP digital power amplifier integrated with an optical fiber switch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides an IP digital power amplifier with an integrated fiber optic switch, including a power supply unit, a network control board, a fiber optic switch unit, a main power amplifier module, a backup power amplifier module, and an output adjustment unit. The power supply unit is connected to the main power amplifier module, the backup power amplifier module, the network control board, the fiber optic switch unit, and the output adjustment unit.

[0006] The power supply unit uses an EMI filter circuit to suppress electromagnetic interference in the mains input, providing a stable power supply for each module. External audio signals are accessed through the optical port of the fiber optic switch unit, where signal adaptation and forwarding are completed, and then transmitted to the network control board. Simultaneously, digital audio decoding, power amplifier status monitoring, and main / backup switching control are realized. The decoded audio signal is first sent to the main power amplifier module for power amplification, and then output through the output adjustment unit. When the main power amplifier module fails, the network control board drives the backup power amplifier module to seamlessly take over the output.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] 1. The IP digital power amplifier of this integrated fiber optic switch eliminates the need for a separate network switch by integrating the fiber optic switch unit with the power amplifier, reducing equipment investment and system cabling complexity, lowering costs and simplifying construction. The EMI filter circuit of the power supply unit effectively suppresses electromagnetic interference and improves the stability of equipment operation.

[0009] 2. The main power amplifier module and the backup power amplifier module work together with the automatic fault switching function of the network control board, combined with the dual network mode and buffering mechanism of the fiber optic switch unit, to ensure continuous and uninterrupted audio signal output.

[0010] 3. The impedance detection and output adjustment unit of the network control board has LED status indicators, enabling rapid fault location and intelligent management. The four-channel design and network cascading function adapt to the needs of multi-scenario zone broadcasting and expansion, which improves the overall reliability, maintainability and flexibility of the system.

[0011] As a further improvement to this technical solution, the power supply unit utilizes an EMI filter circuit to bypass high-frequency differential-mode interference signals to the return-to-source terminal, suppress differential-mode interference, block common-mode interference from passing through, and simultaneously divert the remaining common-mode interference current to the ground wire.

[0012] The beneficial effects of the above-mentioned further improvements are that they effectively suppress electromagnetic interference in the mains input, reduce the impact of external power grid noise on the audio signal, prevent the power amplifier module from experiencing signal distortion or malfunction due to interference, reduce the reverse interference of the internal circuitry to the power grid, comply with electromagnetic compatibility standards, and improve the overall stability and audio output quality of the power amplifier in complex electromagnetic environments.

[0013] As a further improvement to this technical solution, the main power amplifier module includes four output channels, which receive audio signals, convert low-power audio signals into high-power signals, and drive the speaker devices connected to channels 1-4 respectively.

[0014] The beneficial effects of the above-mentioned further improvements are that they can independently receive and amplify audio signals, convert low-power signals into high-power signals that can drive speakers, and achieve precise driving and control of the speaker devices connected to channels 1-4. This not only meets the needs of simultaneous audio playback in multiple areas, but also ensures the stability and independence of audio output in different areas through the independent operation of each channel. It is suitable for applications such as zoned broadcasting in large venues and multi-scene audio coverage, and improves the flexibility and practicality of the system.

[0015] As a further improvement to this technical solution, the network control board monitors the fault signal of the main power amplifier module in real time. When the main power amplifier module channel fails, it triggers an electronic switching switch to switch the audio signal path to the corresponding channel of the backup power amplifier module.

[0016] As a further improvement to this technical solution, the network control board automatically collects voltage and current data, calculates the impedance of the audio equipment, and uses the impedance data as the reference data for subsequent maintenance. When the impedance is abnormal, the status is indicated by the LED of the output adjustment unit.

[0017] The benefits of adopting the above-mentioned further improvements are that they enable accurate and rapid location of faults in audio equipment circuits, greatly simplify the subsequent maintenance process, reduce operation and maintenance costs, and at the same time ensure the safety of equipment operation through real-time monitoring, avoid audio signal distortion or equipment damage caused by circuit problems, and improve the overall reliability and maintainability of the system.

[0018] As a further improvement to this technical solution, the output adjustment unit includes volume adjustment components for channels 1-4 and status indicator components for each channel. Each channel has independent volume adjustment, indicator lights, peak suppression lights, fault lights, and main / standby switching indicator lights.

[0019] As a further improvement to this technical solution, the fiber optic switch unit adopts a one-optical-four-electrical structure, supports dual network modes and network cascading functions, monitors the link status between the optical port and the electrical port through a built-in switching circuit, and automatically switches to the backup port when the primary port fails. During the switching process, a buffering mechanism ensures that the audio signal is not interrupted. When multiple devices are cascaded, the signal is cascaded and transmitted through the electrical port to form a distributed audio network.

[0020] The benefits of adopting the above-mentioned further improvements are that they enhance the reliability of network connections and the continuity of signal transmission, enable multiple devices to be cascaded through electrical ports to form a distributed audio network, meet the expansion needs of large venues, eliminate the need for external switches, simplify the system architecture and construction process, reduce equipment investment and maintenance costs, and enhance the system's adaptability and flexibility in complex network environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall process of this utility model;

[0022] Figure 2 This is a schematic diagram of the workflow of this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 100. Power supply unit; 200. Network control board; 300. Fiber optic switch unit; 400. Main power amplifier module; 500. Backup power amplifier module; 600. Output adjustment unit. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The core equipment in a digital broadcasting system, the IP digital power amplifier and the network switch, adopt a separate structure. When multiple power amplifiers are connected to the network switch at the same time, especially when dual network port backup is required, the investment in network switch equipment is large and the operating cost is high. When the external network is a fiber optic signal input, it is necessary to connect to the fiber optic switch first and then connect the IP digital power amplifier, which increases the equipment connection links. When multiple IP digital power amplifiers are used, each one needs to be connected to the network switch, making the construction relatively complicated.

[0027] like Figure 1 As shown, this utility model provides an IP digital power amplifier with integrated fiber optic switch, including a power supply unit 100, a network control board 200, a fiber optic switch unit 300, a main power amplifier module 400, a backup power amplifier module 500, and an output adjustment unit 600. The power supply unit 100 is connected to the main power amplifier module 400, the backup power amplifier module 500, the network control board 200, the fiber optic switch unit 300, and the output adjustment unit 600.

[0028] The power supply unit 100 uses an EMI filter circuit to suppress electromagnetic interference in the mains input and provide a stable power supply for each module. External audio signals are accessed through the optical port of the fiber optic switch unit 300, which performs signal adaptation and forwarding and transmits the signals to the network control board 200. Simultaneously, digital audio decoding, power amplifier status monitoring, and main / backup switching control are realized. The decoded audio signal is first sent to the main power amplifier module 400 for power amplification and then output through the output adjustment unit 600. When the main power amplifier module 400 fails, the network control board 200 drives the backup power amplifier module 500 to seamlessly take over the output.

[0029] In order to better filter out interference from the mains power supply, the power supply unit 100 uses an EMI filter circuit to bypass the high-frequency differential mode interference signal to the return source, suppress differential mode interference, block common mode interference from passing through, and at the same time shun the remaining common mode interference current to the ground wire.

[0030] After the mains power is filtered out by the EMI filter circuit, it supplies power to the main power amplifier module 400 and the backup power amplifier module 500 through the main power ON / OFF control. The auxiliary power supply unit 100 is driven by the soft power switch to convert the voltage and provide a stable DC power supply to the network control board 200 and the fiber optic switch unit 300.

[0031] It effectively suppresses electromagnetic interference in the mains input, reduces the impact of external power grid noise on audio signals, avoids signal distortion or malfunction of the power amplifier module due to interference, and reduces reverse interference of the internal circuitry to the power grid. It meets electromagnetic compatibility standards and improves the working stability and audio output quality of the entire power amplifier in complex electromagnetic environments.

[0032] In order to connect multiple audio devices, the main power amplifier module 400 includes four output channels, which receive audio signals, convert low-power audio signals into high-power signals, and drive the speaker devices connected to channels 1-4 respectively.

[0033] When the main power amplifier module 400 is working, it first receives audio signals through four independent channels, and then converts the low-power audio signals into high-power signals through the internal amplification circuit. Subsequently, it provides sufficient driving power to the speaker devices connected to channels 1-4, so that the speakers can output corresponding audio, meet the needs of multi-channel independent sound production and driving different speakers, realize the power amplification of audio signals and multi-channel output driving, and adapt to audio playback in multi-speaker scenarios.

[0034] In order to better switch the backup power amplifier module 500, the network control board 200 monitors the fault signal of the main power amplifier module 400 in real time. When the main power amplifier module 400 channel fails, it triggers the electronic switching switch to switch the audio signal path to the corresponding channel of the backup power amplifier module 500.

[0035] The backup power amplifier module 500 is dual-channel. When one channel of the main power amplifier module 400 fails, the corresponding channel is switched to the backup power amplifier module 500. When both channels of the main power amplifier module 400 fail at the same time, both channels are switched to the backup power amplifier module 500.

[0036] The network control board 200 continuously monitors the main power amplifier module 400. Once it detects a channel failure signal, it immediately triggers the electronic switching switch to quickly redirect the audio signal transmission path to the corresponding channel of the backup power amplifier module 500, ensuring continuous audio signal output and preventing audio playback interruption due to main power amplifier channel failure, thereby improving the reliability and stability of the system's audio transmission.

[0037] In order to better calculate the impedance of audio equipment, the network control board 200 automatically collects voltage and current data, calculates the impedance of audio equipment, and uses the impedance data as the reference data for subsequent maintenance. When the impedance is abnormal, the status is indicated by the LED of the output adjustment unit 600.

[0038] The system automatically collects voltage and current data from audio equipment such as the main power amplifier module during operation. Based on electrical principles (impedance = voltage / current), it calculates the equipment impedance and stores this impedance data as a benchmark for subsequent maintenance. During maintenance, the real-time measured impedance is compared with the benchmark data to quickly determine whether there are impedance deviation problems caused by component aging, circuit abnormalities, etc. This helps to detect potential problems in advance, carry out accurate maintenance, and ensure the stable operation of the audio system.

[0039] In order to better display the status of each module, the output adjustment unit 600 includes volume adjustment components for channels 1-4 and status indicator components for each channel. Each channel has independent volume adjustment, indicator lights, peak suppression lights, fault lights and main / standby switching indicator lights.

[0040] When the impedance is abnormal, the status is indicated by the LED of the output adjustment unit 600. When the channel 1 line is faulty, the red LED is always on; when the channel 2 line is faulty, the red LED flashes once every 1 second; when the channel 3 line is faulty, the red LED flashes once every 2 seconds; and when the channel 4 line is faulty, the red LED flashes once every 4 seconds. Based on Ohm's law, the impedance of the audio equipment is calculated by detecting the ratio of the power amplifier output voltage to the loop current. The real-time impedance is compared with the reference value. When the impedance exceeds the threshold, the corresponding channel LED status indication is triggered.

[0041] To better improve the reliability of network connections and the continuity of signal transmission, the fiber optic switch unit 300 adopts a one-optical-four-electrical structure, supports dual network modes and network cascading functions, monitors the link status of optical and electrical ports through a built-in switching circuit, and automatically switches to the backup port when the primary port fails. During the switching process, a buffering mechanism ensures that the audio signal is not interrupted. When multiple devices are cascaded, the signal is cascaded and transmitted through the electrical port to form a distributed audio network.

[0042] The "one optical, four electrical" architecture includes one optical port and four electrical ports. One electrical port is used for internal communication with the output conditioning unit 600, two electrical ports are used for external network connections, and the remaining electrical port is reserved. The optical port is used for external connections and employs an SFP module with an LC interface fiber optic module, supporting adaptive hot-swappable 1.25G 1310nm gigabit single-mode single-fiber optical modules. It supports dual network modes and network cascading functionality. In dual network mode, the automatic switching time between the optical and electrical ports does not exceed 45 seconds.

[0043] The Fiber Optic Switch Unit 300 is based on a one-optical-four-electrical structure. With its built-in switching circuit, it monitors the link status of the optical and electrical ports. When the primary port fails, it automatically switches to the backup port and uses a buffering mechanism to ensure uninterrupted audio signals. It also supports dual network modes and cascading functions. When multiple devices are cascaded, signals are transmitted through the electrical ports to build a distributed audio network. This not only improves network connection reliability and ensures signal continuity, but also meets the expansion needs of multiple devices and optimizes system architecture and audio transmission coverage.

[0044] like Figure 2 As shown, the external audio signal first enters the fiber optic switch unit 300, which is connected via optical / electrical ports and transmitted via network ports. One path leads to the network control board 200. After detection / monitoring, if the main power amplifier module 400 is normal, it outputs the signal. If the main power amplifier channel 400 fails, it switches to the backup power amplifier module 500. The audio signal is then output via the output adjustment unit 600. Another path can be connected to other devices via electrical port 2-optical port, forming a complete audio signal transmission and processing flow, ensuring effective audio signal transmission and fault switching backup.

[0045] In summary, the working principle of this solution is as follows:

[0046] The IP digital power amplifier of this integrated fiber optic switch eliminates the need for a separate network switch by integrating the fiber optic switch unit 300 with the power amplifier, reducing equipment investment and system cabling complexity, lowering costs and simplifying construction. The EMI filtering circuit of the power supply unit 100 effectively suppresses electromagnetic interference and improves the stability of equipment operation.

[0047] The main power amplifier module 400 and the backup power amplifier module 500 work together with the automatic fault switching function of the network control board 200, combined with the dual network mode and buffering mechanism of the fiber optic switch unit 300, to ensure continuous and uninterrupted audio signal output.

[0048] The impedance detection and output adjustment unit 600 of the network control board 200 and the LED status indicator enable rapid fault location and intelligent management. The four-channel design and network cascading function adapt to the needs of multi-scenario zone broadcasting and expansion, which improves the overall reliability, maintainability and flexibility of the system.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An IP digital power amplifier integrated with an optical fiber switch, characterized in that: It includes a power supply unit (100), a network control board (200), a fiber optic switch unit (300), a main power amplifier module (400), a backup power amplifier module (500), and an output adjustment unit (600). The power supply unit (100) is connected to the main power amplifier module (400), the backup power amplifier module (500), the network control board (200), the fiber optic switch unit (300), and the output adjustment unit (600), respectively. The power supply unit (100) uses an EMI filter circuit to suppress electromagnetic interference in the mains input and provide a stable power supply for each module. External audio signals are accessed through the optical port of the fiber optic switch unit (300), and the signal is adapted and forwarded by the fiber optic switch unit (300) and transmitted to the network control board (200). Simultaneously, digital audio decoding, power amplifier status monitoring and main / backup switching control are realized. The decoded audio signal is first sent to the main power amplifier module (400) for power amplification and output through the output adjustment unit (600). When the main power amplifier module (400) fails, the network control board (200) drives the backup power amplifier module (500) to seamlessly connect the output.

2. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The power supply unit (100) uses an EMI filter circuit to bypass the high-frequency differential mode interference signal to the return source, suppress differential mode interference, block common mode interference from passing through, and at the same time shun the remaining common mode interference current to the ground wire.

3. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The main power amplifier module (400) includes four output channels, which receive audio signals, convert low-power audio signals into high-power signals, and drive the speaker devices connected to channels 1-4 respectively.

4. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The network control board (200) monitors the fault signal of the main power amplifier module (400) in real time. When the main power amplifier module (400) channel fails, it triggers the electronic switching switch to switch the audio signal path to the corresponding channel of the backup power amplifier module (500).

5. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The network control board (200) automatically collects voltage and current data, calculates the impedance of the audio equipment, and uses the impedance data as the reference data for subsequent maintenance. When the impedance is abnormal, the status is indicated by the LED of the output adjustment unit (600).

6. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The output adjustment unit (600) includes volume adjustment components for channels 1-4 and status indicator components for each channel. Each channel has independent volume adjustment, indicator lights, peak suppression lights, fault lights and main / standby switching indicator lights.

7. The IP digital power amplifier for the integrated fiber optic switch according to claim 1, characterized in that: The fiber optic switch unit (300) adopts a one-optical-four-electrical structure, supports dual network modes and network cascading functions, monitors the link status between the optical port and the electrical port through a built-in switching circuit, and automatically switches to the backup port when the primary port fails. During the switching process, a buffering mechanism ensures that the audio signal is not interrupted. When multiple devices are cascaded, the signal is cascaded and transmitted through the electrical port to form a distributed audio network.

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