Description

As a system to connect the sensor in 1.0m unit to measure inner section displacement of the tunnel convergence, it calculates accurate values using a sensor for each displacement and length
in high resolution.

Application

① Measurement of inner section displacement of convergence after completion of the tunnel structure (Measurement for maintenance)
② Measurement of inner section displacement of convergence of the underground structure in adjacent section of construction. (Measurement during the construction)

Composition & Characteristics

Composition

① Cross-sectional convergence displacement sensors (length, angle)
② Mounting bracket and extension rod
③ Anchor plate and bolt

Features

① Each sensor cable is configured into a one-line connection, making installation easy and significantly reducing installation time.
② The anchor block angle adjustment and fastening device connection are simple, allowing for convenient installation.
③ The one-line cable system also helps reduce installation costs.

Specification

Model SJ-9100
Applied Sensor Tilt displacement: MEMS sensor / Length displacement: Electric sensor
Measuring Range Tilt displacement: ±5° / Length displacement: 25 mm
Resolution Tilt displacement: 5 arc seconds / Length displacement: 0.001 mm
Accuracy ±0.1% FSR
Linearity Error ±0.5% FSR
Operating Temperature -30°C ~ 70°C
Specification L = 1.0 m, D(ø) = 24 mm (Customizable by depth/length)
Material Stainless steel, Fluorine-based O-ring, Aluminum

Reference

Subjects General type (Linear fixing) Free movement type (Ball bearing)
Installation method
  • Drilling & insert for fixing pin
  • Sensor fixing
  • Cable fixing
  • Connect automation system
  • Drilling & insert for special fixing pin
  • Sensor fixing
  • Connect automation system
Advantage
  • Numerous field applications & references
< Sensor >
  • Accurate measurement when there is distortion or deformation in the structure. Cable is one-line and easy to install.
  • Installation time can be saved much compared to conventional systems.
< Accessory >
  • Easy to install due to a special fixing pin adopted. Excellent applicability for the surface irregularities of the structure.
Disadvantage
  • Long installation time and inconvenient for sorting due to bundle cables
  • Functional Limit in detecting displacement in case of distortion or deformation of the Structure
  • Not much field applications & references
Economic conditions
  • Excessive extra expense (Long installation time and much manpower required)
  • Good (Minimum installation time and manpower)
  • The sensor price is the same as the conventional type.

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