An Online Loudspeaker Fault Diagnosis System Based on Peak-to-Average Ratio and Mean Screening

Abstract

The invention discloses an on-line loudspeaker fault diagnosis system based on peak-to-average ratio and average screening, which relates to the fields of signal detection, fault diagnosis and intelligent control in the electroacoustic industry, and is used for monitoring whether passive loudspeakers are in a special industrial environment such as nuclear power plants. Problems with normal working condition. Including: use the control terminal to directly generate a 1kHz sinusoidal excitation signal to actively stimulate the sound of the passive speaker, and then generate a 50Hz sinusoidal energy wave to supply power to the detection terminal, and then the detection terminal converts the loudspeaker sound signal into an electrical signal, and uses the ADC to process the electrical signal Sampling, to obtain the sequence of sampled values ​​V m (t), and for the sequence V m (t) Calculate the peak-to-average ratio and screen the maximum average value to obtain the discrimination of the linear distortion of the sampling results and the judgment result of the speaker failure, and finally send the judgment result to the control terminal along the audio line through the SM2400 communication module based on the PRIME standard.

Description

technical field [0001] The invention relates to the field of signal fault diagnosis in the electroacoustic industry, in particular to an intelligent detection method for in-service loudspeakers, which belongs to the automatic control device in the detection field. Background technique [0002] In daily life and industrial production, loudspeakers are usually used for notification of daily affairs and timely warning of accidents and dangers. Therefore, it is necessary to ensure that the loudspeakers can perform normal broadcasting work and ensure the working status of the broadcasting loudspeakers. [0003] In some industrial fields, for example, the loudspeaker broadcasting system in the nuclear power environment was basically installed and used when the nuclear power plant started commercial operation in 1994. After decades of development and changes, and considering its special high radiation, strong noise, In industrial environments such as high temperature and humidity, ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of the existing loudspeaker broadcasting system that cannot monitor the operating status of the terminal equipment itself, and meet the relevant regulations of the national nuclear facilities, the task of monitoring the sound status of the loudspeaker is automatically completed in time, and the communication and power supply of the diagnostic system use the same line.

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