A hydraulic fiber Bragg grating force sensor and its monitoring system

Request PDF | A hydraulic fiber Bragg grating force sensor and its monitoring system for axial bolt load measurement in anchorage engineering | The bolt support is one of the most important

Monitoring bolt load using an fiber optic sensor

Monitoring bolt load using fiber optic sensors stands out as a highly relevant technological alternative for torque control.

Bolt tension monitoring with reusable fiber Bragg-grating sensors

It utilizes removable and reusable fiber Bragg-grating sensor(s) embedded in a bolt shaft for preload and retained clamp-ing force measurements.

Monitoring rock bolt safety based on FBG sensors

A bolt fiber Bragg grating (FBG) stress sensor is developed based on FBG sensor technology, providing a data-driven analysis tool for monitoring the bolt stress in the working face.

Strain-Sensing Mechanism and Axial Stress Response

This paper proposes a new approach to detecting bolts'' anchoring qualities based on the fiber Bragg grating sensing principle. Moreover, it studies the strain transmission mechanism between the

Stress distribution monitoring of ground anchor using optical fiber

This paper presents our recent application of Brillouin-based optical fiber sensors for geotechnical monitoring. We embed an optical fiber into a prestressing steel strand (hereafter ''strand'') during the

Cable Stress Monitoring Technology Based on Fiber Bragg Grating

To realize the real-time monitoring of the long-term working state of cable and ensure the safe operation during its service life, Swedish scholars have proposed the idea of intelligent anchor

Assessing the Difference in Measuring Bolt Stress: A

The performance of the bolt under pull-out loading was measured using the pulse-pre-pump Brillouin optical time domain analysis (PPP-BOTDA)

Monitoring torque in bolts using an embedded fiber Bragg grating

In this study, we embedded a fiber Bragg grating (FBG) sensor into a bolt and experimentally examined whether the wavelength in the FBG changes in response to small

Bolt axial force monitoring based on fiber grating technology

As an emerging monitoring technology, fiber optic rock bolts offer exceptional resistance to interference, are compact and lightweight, and can monitor the stress state of rock bolts in real time

A hydraulic fiber Bragg grating force sensor and its monitoring system

In conclusion, the FBG sensors can monitor the dynamic stress state of the bolts and anchor cables in the roadway and provide automatic data acquisition and real-time on-line monitoring.

Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating

This study presents a field test to assess the feasibility of fiber Bragg grating (FBG) sensors in monitoring the stress profile of GFRP anchors during pulling test. Two GFRP anchors were fully

Anchor test and long-term monitoring of grouted anchors instrumented

This article deals with anchor tests instrumented with FBG deformation gauges of the root and the tendon of the pre-stressed strand anchor in a test field in the Central Bohemian Region.

Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating

The field test results indicate that the embedded FBG technology was feasible to monitor the stress state of GFRP anchors during pulling. Glass fiber-reinforced polymer (GFRP) bolts have been widely used

A New Self-Sensing Fiber Optic Anchor to Monitor Bolt

This new self-sensing fiber optic anchor was first applied to an open TBM tunneling project in an inclined shaft in the Kekegai coal mine, and

A load measuring anchor plate for rock bolt using fiber optic sensor

Therefore, it is very important to monitor the load level of the rock bolts. In this short communication, we propose a smart anchor plate, a simple but effective device that uses fiber Bragg

Fiber Bragg Grating Monitoring of Full-bolt Axial Force

With the increase of mining depth and strength, the evolution of bolt axial force is increasingly becoming important for ensuring the reliability and

(PDF) Strain-Sensing Mechanism and Axial Stress

A fiber-optic monitoring test platform of anchor bolt anchoring quality is built. The full-length anchor bolt''s strain evolution law and axial force distribution

Bolt axial force monitoring based on fiber grating technology

The Bragg grating chain is connected and embedded into the anchor rod, which solves the problems that the surface-mounted grating anchor rod cannot be reused and is easily affected by the

Application of Fiber Bragg Grating Sensing Technology

The traditional bolt force status monitoring (BFSM) method has poor anti-interference performance, is easily affected by harsh downhole

Testing Mechanical Properties of Rock Bolt under Different Supports

In future work, we will use the rock bolts integrated with fiber optical sensors to monitor the stress changing along its shaft and to estimate the remaining force bearing capacity of a corroded rock bolt.

Experimental study of anchor bolt stress evaluation with hybrid optical

In this study, we introduce an innovative hybrid monitoring system based on strain gauges, Fiber Bragg Gratings (FBG), and Brillouin Optical Time Domain Analysis (BOTDA). A specialized dynamometer

Monitoring and correction of the stress in an anchor bolt based on

Grooving on the surface of a bolt and embedding an optical fiber is one of the main methods for monitoring the anchorage performance and stress distribution around the bolt in underground

(PDF) Anchor test and long-term monitoring of grouted

Geotechnical monitoring of anchors provides fundamental data for analysis and evaluation to ensure safe environment. The use of optic fiber

Stress Monitoring of Roadway with Bolt Sensor Based on Fiber Bragg

Stress-strain monitoring system of fiber bragg grating sensing for mining anchor Jan 2005 1 Lan Chai Jing Application of optical fiber sensing technology in monitoring of anchor shank axial

Application of fiber optical sensing technology to monitoring axial

The basic principle of fiber Bragg grating sensor is described. Through engineering application of fiber Bragg grating sensor to monitoring axial forces of anchor bolts for Longtan tunnel