Fault detection system for multiple speakers

Abstract

The invention discloses a fault detection system for multiple speakers. The fault detection system for multiple speakers is characterized by comprising a differential amplification circuit, a second-stage operational circuit, a voltage comparator and a fault alarm circuit, wherein two signal terminals of the differential amplification circuit are connected in series in an audio loop of a multi-speaker system, after a rectifying and filtering circuit rectifies and filters signals output by the second-stage operational circuit, the signals are input to an in-phase input end of the voltage comparator, and an anti-phase input end of the voltage comparator is connected to a power source through a potentiometer; the fault alarm circuit does not give an alarm by adjusting the potentiometer at the anti-phase input end of the voltage comparator; when one speaker is broken down and disconnected, differential signals input into the differential amplification circuit are reduced, and output level of the voltage comparator is overturned to trigger alarm. The system has simple circuits and low cost and is convenient to mount, all that is required is to connect the system into the speakers in series, and the operation can be performed; the system can be mounted to a master control room, can also be mounted on each speaker, and can detect whether speaker damage exists in real time.

Description

technical field [0001] The invention relates to a multi-speaker fault detection system, more specifically, to a multi-speaker fault detection system capable of real-time detection of one or some disconnection or failure of a plurality of sound boxes. Background technique [0002] Public places such as supermarkets and scenic spots often use wired broadcasting for notification or publicity. Such applications generally use multiple wired speakers for large-scale broadcasting. The number of speakers ranges from several to dozens, and the number of speakers in some large scenic spots even exceeds hundreds. They are distributed in hundreds of square meters or even thousands of square meters. If a speaker is broken, it is difficult to detect it. If a speaker is damaged in a noisy and densely installed place inside the supermarket, due to the relative distance between the speakers, if a speaker is damaged , It is necessary for the maintenance personnel to be close to the speaker in...

AI Technical Summary

Problems solved by technology

[0002] Public places such as supermarkets and scenic spots often use wired broadcasting for notification or publicity. Such applications generally use multiple wired speakers for large-scale broadcasting. The number of speakers ranges from several to dozens, and the number of speakers in some large scenic spots even exceeds hundreds. They are distributed in hundreds of square meters or even thousands of square meters. If a speaker is broken, it is difficult to detect it. If a speaker is damaged in a noisy and densely installed place inside the supermarket, due to the relative distance between the speakers, if a speaker is damaged , the maintenance personnel need to be close to the speaker in the air to find the fault, which brings a lot of inconvenience to the maintenance work

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