Development of laser interferometer strain-seismometer

激光干涉仪应变地震仪的研制

• 批准号: 15340148
• 负责人: YAMADA Isao
• 金额: $ 10.5万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340148/
• 关键词: seismometer; laser interferometer; strain seismometer; broad-band seismometer; レーザー干渉計; 超長周期地震計; レーザー干渉型歪み計

We developed the strain-seismometer which used a laser interferometer in this project. This year, we did observation with this super long period seismometer and did comparison with a record of quartz pipe strain meter and STS -1 type broad-band seismometer.As a result it does not extend to performance of a STS -1 type seismometer.We can get a good record by revising atmospheric pressure and a change of minute temperature in an observation trench. The cause of noise is understood that it was warp of the laser interferometer by around 1/100 deg.temperature change in a trench by observation of temperature by an exact thermometer and observation of atmospheric pressure change by a micro-barometer.The developed strain seismometer seems to do warp by temperature more greatly, because various kinds of materials are used every a part by difficulty and a price of production. I have to build the system which is not influenced in a temperature change by materials of super iron-nickel alloy with a little temperature changes.

在本项目中，我们研制了使用激光干涉仪的应变地震仪。今年我们用这种超长周期地震仪进行了观测，并与石英管应变仪和STS-1型宽频带地震仪的记录进行了比较，结果表明，它并不延伸到STS-1型地震仪的性能上，我们可以通过修正观测槽内的气压和分钟温度的变化来获得较好的记录。通过精密温度计的温度观测和微气压计的气压观测，可以理解噪声的原因是激光干涉仪在沟槽中因约1/100度的温度变化而产生的翘曲。开发的应变地震仪似乎因温度而产生更大的翘曲，因为各种材料的使用都很困难，而且生产成本很高。我必须建立一个系统，这是不受影响的温度变化的材料，超级铁镍合金与一个小的温度变化。