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Soil settlement observation and measurement system based on Bragg grating

A technology of Bragg grating and settlement observation, which is applied in measuring devices, surveying and navigation, height/horizontal measurement, etc. It can solve the problems of affecting the working accuracy, not being able to record data fully automatically, and requiring manual readings, etc., so as to avoid electromagnetic interference and work The effect of stability and high measurement accuracy

Active Publication Date: 2017-03-22
宁波建工建乐工程有限公司 +1
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Problems solved by technology

However, since LVDT is an inductive sensor, it is often affected by electromagnetic interference during actual operation, which greatly affects its working accuracy.
If the settlement of the deformed plate is tested with a dial indicator, the data has high reliability and high precision, and the precision can reach 0.01mm. However, manual reading is required, and the data cannot be recorded automatically, which is to a certain extent the later data. The processing and analysis of the

Method used

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  • Soil settlement observation and measurement system based on Bragg grating
  • Soil settlement observation and measurement system based on Bragg grating

Examples

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Embodiment 1

[0018] Example 1, such as figure 1 with figure 2Shown: a soil settlement observation system based on Bragg gratings, including a deformation plate 1, a fixed plate 2, a settlement rod 3 and a deformation plate 6, the settlement rod 3 is arranged on the deformation plate 6, the One end of the deformation plate 1 is fixed on the fixed plate 2 and the other end is connected with the settling rod 3 . The settling rod 3 is divided into an upper section and a lower section, and the upper section and the lower section are connected by a connecting sleeve 5 , and an additional weight 7 is arranged on the connecting sleeve 5 . The lower part and the connecting sleeve 5 are covered with a settling sleeve 4 , and there is a gap between the top of the settling sleeve 4 and the attached weight 7 . The outer surface of the connecting sleeve 4 has external threads, and the middle of the attached weight 7 has internal threads, and the described attached weight 7 can be fixed with the conne...

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Abstract

The invention provides a soil settlement observation and measurement system based on a Bragg grating, and relates to a soil settlement observation system. The soil settlement observation and measurement system based on the Bragg grating comprises a deformation plate, a fixed plate, a settlement rod and another deformation plate, wherein the settlement rod is arranged on the deformation plate; one end of the deformation plate is fixed at the other end of the fixed plate and is connected with the settlement rod; a deformation testing Bragg bare grating is arranged in the middle of the deformation plate and is connected with a temperature compensation Bragg bare grating through a single-mode single-core optical fiber; and the deformation testing Bragg bare grating and the temperature compensation Bragg bare grating are connected to a Bragg grating demodulator. Compared with the prior art, the measurement system is provided with an optical fiber sensor, so that influence of electromagnetic interference is avoided. Meanwhile, the soil settlement observation and measurement system has a temperature compensation function. The measurement system is stable in operation and high in measurement precision, can be regulated and changed according to measurement requirements, and can adapt to measurement of most of settlement surfaces.

Description

technical field [0001] The invention relates to a soil settlement observation system, in particular to a fully automatic soil settlement observation system. Background technique [0002] In the field of geotechnical engineering, deformation and stability are two basic difficulties, and the deformation of soil is one of the issues that many engineers are extremely concerned about. At present, the common soil settlement test method is mainly to observe through the deformation plate matching LVDT or dial indicator. LVDT uses the principle of electromagnetic induction to test the settlement. During the settlement of the deformed plate, the settlement of the deformed plate changes linearly with the voltage within a certain range, and the voltage of the LVDT is converted into settlement by testing the voltage of the LVDT. The accuracy of LVDT varies with the range, generally 0.24% of the range, that is, if the range is 10cm, then its accuracy is 0.24mm. However, since LVDT is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 汪焱卫
Owner 宁波建工建乐工程有限公司
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