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在磁带地震仪器的检修记录和检查记录中,恒速记录是一张主要记录,而且是要经常做的。我们在使用磁带地震仪器的过程中,做恒速检查有一段时间经常出现各道有系统相位差(所划的几道100赫波形轴向系统倾斜)。我们曾多次检查晶振,但是并没有发现问题。这是为什么呢?经过实践我们发现造成上述现象的原因与晶振并没有关系,而主要是由机械故障造成的。我们知道仪器100赫讯号和驱动马达的50赫讯号是同一个“标准讯号发生器”
In tape inspection and inspection records of seismic instruments, constant speed recording is a major record, and it is often done. During the course of using the tape seismic instrument, we often made the systematic phase difference of each track (the planned slant of several 100-Hz waveform axial systems) during a constant speed check. We have repeatedly checked the crystal, but did not find the problem. This is why? After practice, we found that the reasons for the above phenomenon and the crystal has nothing to do, but mainly caused by mechanical failure. We know that the instrument 100 Hz signal and the drive motor 50 Hz signal is the same “standard signal generator”