DZC1—71型磁带地震仪AVC对高通有源滤波器的影响

• 机 构: 国家地质总局第二物探大队仪修室,
• 出 处: 石油物探
• 发表日期: 1977年02期
• 关键词: 有源滤波器 磁带地震仪 磁带记录 野外试验 地质仪器 地震仪 滤波器 AVC DZC1 地震波能量

北京地质仪器厂产的DZCl—71型磁带记录地震仪,从接受到现在,经过一年多来的生产实践,其鼓速稳定、各部性能基本可以,它具有体积小、重量较轻的特点,便于四川丘陵山区的野外工作。但经仪器调校及野外试验对比后,发现该仪器由于AVC作用改变了存源滤波器的特性,引起讯号的相位时差变化,为此我们进行了一些线路改装,试验和生产工作表明,这种改装取得了一定效果。本文对这个问题提出以下初步探讨。

DZCl-71 Tape Recorder Seismograph produced by Beijing Geological Instrument Factory, from its acceptance to the present, is more stable in its performance after more than a year of production. Its performance is basically the same. It has the characteristics of small size and light weight, Easy to work in the hilly mountains of Sichuan. However, after instrument calibration and field test, it was found that the instrument changed the characteristics of the source-filter due to the AVC effect, causing the phase difference of the signal to change. Therefore, we carried out some circuit modification, test and production work. Refit made some effect. This article put forward the following preliminary discussion of this issue.