一个呼吸检测空气袋包括一个空气袋和一个检测器。空气袋包括一个海绵体,它能够随着被测人胸部或腹部的收缩和扩张而扩张和收缩。一个封闭了海绵体的海绵罩,用来防止含在梅绵体微孔中的空气从微孔中释放出去,还有一个法兰盘和梅绵体边缘及空气导向管装成了一个整体。空气导向管是用来给由于海绵体的扩张和收缩面引起的空气流导向的。检测器包括一个振荡薄膜,用来引起此薄膜和它后面电极之间的静电电容的变化,而这种变化是和由于空气袋的扩张和收缩面造成的空气运动有关的。一个驻极体电容拾音器,内有场效应晶体管可以把静电电容的变化转变成电压变化。还有一个用于降低压力 A breath-sensing air bag includes an air bag and a detector. The air bag includes a sponge that can expand and contract as the test person’s chest or abdomen contracts and expands. A closed sponge cover sponge to prevent the air contained in the microporous microporous release from the microporous, there is a flange and the edge of the body and the air tube into a body. Air ducts are used to direct the flow of air due to the expansion and contraction of the sponge. The detector includes an oscillating membrane for inducing a change in electrostatic capacitance between the membrane and its rear electrode in response to air movement due to expansion and contraction of the air bag. An electret condenser pickup with field effect transistors converts the change in capacitance into a voltage change. There is another one to reduce the pressure