摘要
TJ-1型体积式钻孔应变仪已试用十余年,取得一定的实效。根据中国地震局,《九五规划》要求,1996~1998年进行实用化研究,其中也包括电子线路部分也需作多处相应的改进。已研制成功的TJ-2型小型化体应变仪,它不仅对井下仪器作了小型化与系列化的改造,在电子线路部分亦相应作了改进。本文重点介绍了在讯号传送方面的研制情况,其量程(优于6×10-6应变)范围、噪声水平(优于6×10-9应变)等主要技术指标都有明显提高,且电压输出格式能符合数字化台网建设的要求。二、压力传感器的选型传感器(即传感单元)在体应变仪的发展进程中,已经从“波纹管+差动变压器”(即TJ-1型)发展为差压式液压传感器(即TJ-1A型)。
Some recent advances of the TJ-2 type Borehole Volume-Strainmeter is reported in this paper. A hydropressure sensor has been adopted in the TJ-2 type to replace the differential transducer that used in the TJ-1 type, so that the circuitry has been changed from AC to DC. Moreover, in order to match the digital network construction in this country, the circuitry must satisfy the requirement of low noise and a big dynamic range etc., to ensure that when the measuring range is greater than 6×10^(-6)(when the electro-magnetic valve off), the sensibility of the measuring system must superior to 1×10^(-9).
出处
《地壳构造与地壳应力文集》
1998年第1期172-178,共7页
Bulletin of the Institute of Crustal Dynamics
