Sound vibration temperature signal synchronous acquisition method and device for hydraulic turbine set

Abstract

The invention belongs to the technical field of sensors, and relates to a sound vibration temperature signal synchronous acquisition method and device for a hydraulic turbine set. According to the method, the state of key electromechanical equipment of a hydraulic turbine set is monitored, sound, vibration and temperature signals are synchronously collected, the interval of microphone sampling points is set, sound data in a sound data cache region in a memory are stored in a segmented mode, and the sound data serve as time synchronization nodes; the acceleration data in the vibration data cache region of the memory and the thermometer data in the random access memory are stored in a segmented mode; and when the microphone completes audio acquisition at an interval, the sound data, the acceleration data and the temperature data sampled within the time are packaged into a data packet together, and the data packet is uploaded to the cloud server, so that synchronous acquisition of sound vibration temperature signals is realized. According to the method, traditional collection of vibration, temperature signals and sound signals is compatible, and a more comprehensive, effective and accurate judgment basis can be provided for state monitoring of the hydraulic turbine set.

Description

technical field [0001] The application belongs to the technical field of sensors, and in particular relates to a method and device for synchronously collecting sound, vibration, and temperature signals of a water turbine unit. Background technique [0002] Hydraulic turbines are low-speed and heavy-duty equipment, and traditional condition monitoring mostly uses vibration signals and temperature signals. In recent years, the application of sound monitoring technology in the field of industrial equipment condition monitoring has received more and more attention. The signal acquisition of sound, vibration and temperature provides a comprehensive and effective basis for the condition monitoring of hydraulic turbines. [0003] The sampling frequency of the sound signal is in the range of 20Hz to 48kHz, and the sampling frequency of the vibration signal is in the range of 0.1kHz to 1.6kHz. Traditional sound, vibration and temperature signals are collected independently and proc...

AI Technical Summary

Problems solved by technology

However, in order to increase the practicability of the signal, the synchronization between the signals must be guaranteed, otherwise the necessity of the three kinds of signal acquisition will be lost

[0004] However, limited by the special working conditions of the water turbine unit (strong noise environment, complex overall structure, confined space, wide distribution of equipment to be detected, and some components under water, etc.), the sound extraction effect of the traditional microphone array is not ideal, especially in strong It is almost impossible to use in application scenarios such as effective extraction of target sounds in noise interference environments, waterproofing, and sound source positioning inside turbines

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