Novel mill sound device with frequency selection method

Abstract

The invention relates to a novel mill sound device with a frequency selection method, which comprises a mill sound microphone; the output end of the mill sound microphone is connected with a measuring circuit by a cable led out from the mill sound microphone; and the measuring circuit is internally provided with a frequency selecting loop. The novel mill sound device utilizes the mill sound microphone to collect the noise generated by a mill, causes the collected white noise to select a frequency band corresponding to the mill by the frequency selecting loop in the measuring circuit and then monitors the sound generated by the mill under the frequency band in real time. The novel mill sound device has higher sensitivity and measuring precision.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a novel sound grinding device through frequency selection. Background technique [0002] The grinding sound measuring instrument is to measure the noise signal of the ball mill and convert the sound signal into an electrical signal to realize the monitoring of the operating condition of the ball mill, and then to control the operating condition of the ball mill. It can be widely used in cement, metallurgy, Electricity and other industries. [0003] At present, there are many types of grinding sound measuring instruments used in China, which can only detect the noise level, and cannot perform fine frequency selection and then amplify the measurement of the noise of the ball mill, because each ball mill and the same ball mill material have different frequencies. If the noise of the mill is ignored Only amplifying the noise volume will reduce the resolution, reduce t...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many types of grinding sound measuring instruments used in China, which can only detect the noise level, and cannot perform fine frequency selection and then amplify the measurement of the noise of the ball mill, because each ball mill and the same ball mill material have different frequencies. If the noise of the mill is ignored frequency, only amplifying the noise volume will reduce the resolution, reduce the measurement accuracy, and increase the error

In addition, the existing sound grinding instruments lack crosstalk compensation, which causes noise interference from adjacent mills; the existing grinding sound microphones widely use dynamic microphones, which have low sensitivity and are difficult to collect noise. The use of horn speakers increases the background noise and affects the measurement results.

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