在一些场合中,由于没有能对天然气和一氧化碳出现的危险情况进行探测,所以,这些有害气体就经常造成大量的死亡。荷兰Eindhoven菲力蒲研究中心发明了一种简单而紧凑的装置,当一氧化碳或其它可燃性气体的浓度达到危险的程度时,这种装置就会发出一种报警信号。这种报警器的工作基础是,加入催化剂,使可燃性气体在空气中氧化。为此,就需要一根经过特殊处理的白金导线。气体燃烧时释放出热量,使白金导线的温度上升,因而也就增大了它的电阻,将这根导线放到一个平衡电路(惠斯顿电桥)中,我们就可以测出这个电阻增大的情况。在周围的空气中,只要一氧化碳或天然气的浓度达到0.1%,电桥的平衡就被破坏,以致发出一种有声的信号。 On some occasions, these hazardous gases often cause a large number of deaths due to the inability to detect hazardous conditions that occur with natural gas and carbon monoxide. The Eindhoven Research Center in the Netherlands has invented a simple and compact device that emits an alarm when the concentration of carbon monoxide or other flammable gases reaches a dangerous level. The basis for this alarm is the addition of a catalyst that oxidizes flammable gases in the air. To do this, you need a specially treated platinum wire. The gas releases heat when it burns, causing the temperature of the platinum wire to rise, thus increasing its resistance. Putting this wire in a balanced circuit (Wheatstone bridge), we can measure this increase in resistance Big situation. In the surrounding air, as long as the concentration of carbon monoxide or natural gas reaches 0.1%, the balance of the bridge is destroyed, giving rise to an audible signal.