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站在展览会的钻孔应变地震仪旁,只要用手摸一摸装有探头观测井的水泥模型,仪器的记录笔立即记录下这一震动的微小变化.不少参观者称赞:这仪器真灵!钻孔应变仪可以摸到地球的“脉搏”,把它的探头放入观测井下、岩石中或土层里,就能记录地层应力的微弱变化、地震波和地脉动信号.据介绍,钻孔应变仪灵敏度高达10~(-11)量级,即使在1公里长的地段地下岩石缩小或伸长一根头发丝宽,它也能测出来.深井地声仪是地球的“听诊器”,是一种频带极宽的高灵敏度大动态地震仪.
Standing beside the borehole strain gauges at the exhibition, just touch the cement model with the probe observation well, and the pen of the instrument immediately records the slight changes of this vibration. Many visitors praise: This instrument is really Spirit! Drilling strain gauge can touch the earth’s “pulse”, put its probe into the observation hole, rock or soil, we can record the weak changes in formation stress, seismic waves and ground pulsation signal.It is reported that the drill Hole strain gauges have sensitivities as high as 10 to (-11) and can be detected even when the underground rock shrinks or stretches a hairline even in a 1 kilometer stretch. The deep hole phonograph is the Earth’s “stethoscope” Is a very wide band of high sensitivity large dynamic seismograph.