Power amplifier system for electroacoustic alarm supporting out-of-band audio monitoring

Abstract

The utility model discloses a power amplification system for an electroacoustic alarm supporting out-of-band audio monitoring, which comprises a communication interface and control module, a test sound generation module, an audio processing module, a power amplification module and a voltage and current monitoring module, the communication interface and control module receives a control instruction of the alarm control module and issues the control instruction to the corresponding module, the test sound generation module generates out-of-band test audio with the needed frequency and amplitude, and the audio processing module is used for processing audio signals of the out-of-band test audio or alarm audio. And the power amplification module is used for performing power amplification on the processed audio signal and outputting the amplified audio signal to a loudspeaker, and meanwhile, controlling the voltage and current monitoring module to perform voltage and current monitoring on an audio output channel and sending monitoring data to the alarm control module through the communication interface and control module.

Description

Technical Field

[0001] This utility model relates to the field of audio processing technology, specifically to a power amplifier system for an electro-acoustic alarm that supports out-of-band audio monitoring. Background Technology

[0002] Power amplifiers are typically used to preprocess and amplify alarm audio signals to drive external speakers for air defense, disaster prevention, and alarm notification. Existing alarm and test tones have high output sound intensity, which can easily cause noise interference to residents and is unsuitable as a routine method for detecting the operational status of electro-acoustic alarm terminals. Utility Model Content

[0003] The purpose of this invention is to provide a power amplifier system for an electro-acoustic alarm that supports out-of-band audio monitoring to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An amplifier system for an electro-acoustic alarm supporting out-of-band audio monitoring includes a communication interface and control module, a test tone generation module, an audio processing module, a power amplification module, and a voltage and current monitoring module. The communication interface and control module receives control commands from the alarm control module and sends them to the corresponding modules. The test tone generation module generates out-of-band test audio with the required frequency and amplitude. The audio processing module processes the audio signals of the out-of-band test audio or alarm audio. The power amplification module amplifies the processed audio signals and outputs them to a speaker. Simultaneously, the voltage and current monitoring module monitors the voltage and current of the audio output channel and sends the monitoring data to the alarm control module through the communication interface and control module.

[0006] Preferably, the voltage and current monitoring module monitors four audio output channels.

[0007] Preferably, the operating frequency range of the loudspeaker is 300Hz to 8kHz.

[0008] Preferably, the communication interface and the control module are bidirectionally connected through the communication interface to the alarm control module.

[0009] Preferably, the audio processing module receives external alarm audio through the alarm audio input port.

[0010] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0011] This utility model provides a power amplifier system for an electro-acoustic alarm that supports external audio monitoring. The power amplifier system supports no sound / low sound test mode, does not produce obvious audible sound, does not affect citizens' lives, and can be used for routine testing of high-power electro-acoustic alarm terminals. At the same time, the frequency amplitude range of the external audio signal can be adjusted to flexibly match different types of speakers. Attached Figure Description

[0012] Figure 1 This is a structural block diagram of the present utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] Example

[0015] Please refer to Figure 1 As shown, this utility model discloses a power amplifier system for an electro-acoustic alarm that supports out-of-band audio monitoring. It includes a communication interface and control module, a test tone generation module, an audio processing module, a power amplification module, and a voltage and current monitoring module. The communication interface and control module receives control commands from the alarm control module and sends them to the corresponding modules. The test tone generation module generates out-of-band test audio with the required frequency and amplitude. The audio processing module processes the audio signals of the out-of-band test audio or alarm audio. The power amplification module amplifies the processed audio signals and outputs them to the speaker. Simultaneously, the voltage and current monitoring module monitors the voltage and current of the audio output channel and sends the monitoring data to the alarm control module through the communication interface and control module.

[0016] The voltage and current monitoring module monitors four audio output channels. The current detection module monitors the voltage and current of these four channels and, based on the measured data and pre-set judgment rules, determines the operating status of the amplifier and speaker in each channel. The results are then fed back to the alarm control module via the communication interface. Judgment rules: Based on the detectable voltage and current values ​​exceeding a certain threshold for each channel, if the values ​​meet the specified thresholds, the channel is considered normal; otherwise, an abnormality or malfunction exists.

[0017] The operating frequency range of loudspeakers is typically 300Hz to 8kHz. When driven by low-amplitude sine wave signals below 300Hz, no noticeable audible sound will be produced.

[0018] The communication interface and control module are bidirectionally connected to the alarm control module through the communication interface.

[0019] The audio processing module receives external alarm audio through the alarm audio input port.

[0020] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A power amplifier system for an electro-acoustic alarm that supports out-of-band audio monitoring, characterized in that: The system includes a communication interface and control module, a test tone generation module, an audio processing module, a power amplification module, and a voltage and current monitoring module. The communication interface and control module receives control commands from the alarm control module and sends them to the corresponding modules. The test tone generation module generates out-of-band test audio with the required frequency and amplitude. The audio processing module processes the audio signals of the out-of-band test audio or alarm audio. The power amplification module amplifies the processed audio signals and outputs them to the speaker. Simultaneously, the system controls the voltage and current monitoring module to monitor the voltage and current of the audio output channel and sends the monitoring data to the alarm control module through the communication interface and control module.

2. The power amplifier system for an electro-acoustic alarm supporting out-of-band audio monitoring as described in claim 1, characterized in that: The voltage and current monitoring module monitors four audio output channels.

3. The power amplifier system for an electro-acoustic alarm supporting out-of-band audio monitoring as described in claim 1, characterized in that: The loudspeaker operates in the frequency range of 300Hz to 8kHz.

4. The power amplifier system for an electro-acoustic alarm supporting out-of-band audio monitoring as described in claim 1, characterized in that: The communication interface and control module are bidirectionally connected through the communication interface to the alarm control module.

5. The power amplifier system for an electro-acoustic alarm supporting out-of-band audio monitoring as described in claim 1, characterized in that: The audio processing module receives external alarm audio through the alarm audio input port.

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