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Short-base line telescoping instrument

A technology with short baseline and baseline, which is applied in the observation of solid tides with strain in the tunnel.

Inactive Publication Date: 2003-11-19
INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The search results show that there are no domestic and foreign literature reports on the measurement of strained solid tides using extensometers with indium steel rods as the baseline, and no corresponding calibration equipment is mentioned in all the detected literature

Method used

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  • Short-base line telescoping instrument
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Embodiment Construction

[0019] Further illustrate below in conjunction with accompanying drawing and embodiment:

[0020] (1) Overall

[0021] Depend on figure 1 It can be seen that the present invention is mainly composed of a baseline 1 , a suspension system 2 , a transducer 3 , a calibration device 4 , and a recording and controller 5 . Take the niobium-containing special indium steel material as the baseline 1, one end of which is the fixed end A, and the other end is the measuring end B. End A of the base line 1 is fixed on the pier a, and it is held up by the suspension system 2 composed of the hanging wire 2.1 and the bracket 2.2 near the end B, and is vertically free to hang. A transducer 3 and a calibration device 4 are installed at the measuring end B, and the calibration device 4 is fixed on the pier b, and both the transducer 3 and the calibration device 4 are connected with a recording and controller 5 .

[0022] When the solid tidal strain occurs in the cavity, the measured end B of ...

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Abstract

The present invention discloses a short-baseline extension instrument, relating to an observation technology of geoscience, specially applicable to observation of concrete strain solid tide. In order to solve the problems of that baseline is long and easy to burst and mercury is easy to leak from mercury box which are being in existent technology said invention uses indium steel rod as baseline and said indium steel rod is vertically and freely hung, and uses electric vortex sensor as senson, and adopts the precision ultramicro-displacement scaling platform, so that it not only solves said problems, but also its sensitivity can be up to 10 to the minus eleventh power order, and its automation extent is high.

Description

technical field [0001] The invention relates to an earth science observation technology, which is especially suitable for the observation of the strained solid tide in a cave. Background technique [0002] At present, most of the observations at home and abroad use quartz tubes or carbon wires as the baseline, the length of which is generally 20 meters, and the relative observation accuracy is 10 meters. -9 Majority, mainly Japan, Western Europe and the United States. There are nearly 30 SSY-II quartz extensometers installed in my country (research results of the Institute of Seismology, China Earthquake Administration in 1982.) Nearly 30 units, their technical level is comparable to that of foreign countries, but the degree of automation and intelligence is low, and the speed of data transmission is slow. There is a large gap in the production process; especially the quartz tube often bursts, and the mercury in the expansion box calibrator is easy to leak, causing environme...

Claims

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Application Information

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IPC IPC(8): G01V1/16
Inventor 吕宠吾杜为民李家明詹碧燕高平
Owner INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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