| YDT318-9AU扬声器异音故障检测方法的研究 |
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| 引用本文： | 许增朴,祝仰宽,王永强,周聪玲.YDT318-9AU扬声器异音故障检测方法的研究[J].电声技术,2016,40(7). |
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| 作者姓名： | 许增朴 祝仰宽 王永强 周聪玲 |
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| 作者单位： | 天津科技大学机械工程学院,天津,300222 |
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| 摘 要： | 将扬声器经过信号源扫频激励后得到的响应信号进行短时傅里叶变换得到响应信号的时频图.由于各阶响应频率的能量值不同,因此可以根据时频图按照各阶能量值划分出不同的区域.为全面获得扬声器的异音故障特征,对时频图中划分的各区域中的各列能量求均值和标准差,可得出能量均值曲线的上限和下限,进而得到待测扬声器能量均值曲线与标准能量均值曲线之间的距离差值,该参数的大小反映扬声器偏离合格的程度,实验表明:该方法可有效检测出YDT318-9AU扬声器的异音故障.
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| 关 键 词： | 扬声器 固有频率 能量均值 时频图 |
| 收稿时间： | 2015/12/23 0:00:00 |
| 修稿时间： | 2015/12/23 0:00:00 |
Research on Sound Fault Detection of YDT318-9AU Loudspeaker |
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| XU Zengpu,ZHU Yangkuan,WANG Yongqiang and ZHOU Congling.Research on Sound Fault Detection of YDT318-9AU Loudspeaker[J].Audio Engineering,2016,40(7). |
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| Authors: | XU Zengpu ZHU Yangkuan WANG Yongqiang and ZHOU Congling |
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| Affiliation: | College of Mechanical Engineering,Tianjin University of Science Technology;China,College of Mechanical Engineering,Tianjin University of Science Technology;China,College of Mechanical Engineering,Tianjin University of Science Technology;China,College of Mechanical Engineering,Tianjin University of Science Technology;China |
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| Abstract: | This paper acquires the two-dimensional response signal of loudspeaker by short time Fourier transform (STFT).Due to the response of each order frequency energy value is different, so we can divide time-frequency map into different energy regions. In order to get comprehensive fault features of the loudspeaker, we will calculate the average energy of every columns in different local regions of time-frequency map and we describe this characteristic value by average energy curve. The value of the characteristic value will decide whether the loudspeaker is good or bad , the result of experiment shows: This method can effectively detect the different fault of YDT318-9 AU speakers. |
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| Keywords: | loudspeaker natural frequency average of energy time-frequency map |
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