Design Pulse Source for TDR System with Large Deformation Distributed Measurement

Distributed measurement of rock-soil deformation is one of the important technologies for geological disaster monitoring. TDR combined with helical sensing cable enables large deformation distributed measurement. A TDR system for distributed measurement of large deformation combines narrow pulse gen...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2020-02, Vol.440 (3), p.32081
Main Authors: DaWei, Guo, Tong, RenYuan, Li, Qing
Format: Article
Language:English
Subjects:
Avalanche transistors
Circuit design
Circuits
Deformation
Geological hazards
Nanosecond pulses
Pulse generators
Reflected waves
Step recovery diodes
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Summary:Distributed measurement of rock-soil deformation is one of the important technologies for geological disaster monitoring. TDR combined with helical sensing cable enables large deformation distributed measurement. A TDR system for distributed measurement of large deformation combines narrow pulse generator circuit, helical sensing cable, reflected wave processing and sampling circuit. The current work mainly includes the design of narrow pulse generation circuit based on avalanche transistor and step recovery diode. The suitable parameters of the components are given, and the nanosecond pulse with larger amplitude, faster falling edge and rising edge is obtained.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/440/3/032081