摘要
在此,介绍了一种宽频带的次声传感器,该型气体型次声传感器有如下特点:频带宽,从0.5~300Hz的范围,覆盖了几乎次声频带的全部和部分可听声频段;频响较好,在设计频段内的曲线平直;输出电压大,可达400mV/Pa,与A/D转换设备一起使用可方便地实现数据的采集;高灵敏度,可接收下限达0.05Pa的声压;通过调节电路中的信号耦合部分的可调电阻,可达到较高的一致性;采用隔舱密封和浸漆设计,从而达到零漂小,能长期有效地工作;所用换能元件的质量较小,振动灵敏度趋近于零,对振动不敏感;通过在管道上布设阵列,使用特定的算法可有效检测气体管道上的泄漏发生。
The gas-type infrasound sensor has the features of wide band (from 0.5 -300 Hz), perfect frequency response, high output voltage (400 mV/Pa), high sensitivity (0.05 Pa). By adjusting the adjustable resistor in the signal coupled uhit of the circuit, the sensor can achieve high consistency. The zero drift can be realized with enclosed cabin and impregnating varnish. The energy conversion device is small. It is insensitive to vibration with its accelerator sensitivity close to zero. By laying an array on the gas pipeline and using a particular algorithm, the sensors can detect any leakage.
出处
《现代电子技术》
2012年第22期119-121,共3页
Modern Electronics Technique
基金
国家自然科学基金(11174320)