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熏烟记录的地震仪笔尖大都用铝箔做成,这种笔尖不耐磨,需要常修剪,否则画出来的线条就粗,使初动、周期不清晰。并且,这种铝箔笔尖弹性也不太好,若记录滚筒的纸未铺平,或两个滚筒由于机械加工上的误差,造成一大一小,以及滚筒丝杆稍有弯曲时,记录纸上就会出现一块块画不到的空白。若把笔尖过度压紧记录纸,又会影响记录灵敏度。当记录频率较高、幅度较大的波形时,铝箔又容易被打坏。
Most of the seismograph records made of fumigated smoke are made of aluminum foil. Such nibs are not wearable and often need to be pruned. Otherwise, the lines drawn are coarse and the mottling is not clear. And, this aluminum foil nib flexibility is not good, if the recording roller paper is not paved, or two rollers due to machining errors, resulting in a big one small, and the roller screw slightly curved, the recording paper There will be a piece of blank space can not be drawn. If the pen tip over the recording paper, will affect the recording sensitivity. When recording waveforms with high frequency and large amplitude, the aluminum foil is easily broken.