Bridge Cable Force, Modal, and Dynamic Vibration Monitoring
A bridge structural health monitoring case group covering cable force monitoring, modal analysis, dynamic vibration monitoring, and long-term bridge safety evaluation.
Project Type
Civil Infrastructure Structural Monitoring
System Scale
modal tests with 25-40 measurement points, 44-cable cable force testing, and 200-channel cable-force plus vibration monitoring
Data Output
cable force, fundamental frequency, modal frequency, mode shape, damping ratio, deck vibration, dynamic strain, and displacement trend
Engineering Value
How the system supported engineering decisions
The case converts bridge cable force, modal analysis, and vibration monitoring into one public DL-SHM workflow.
Wireless and distributed DL-DAQ acquisition supports separated bridge spans and batch measurement areas.
The monitoring outputs strengthen long-term bridge safety evaluation through cable force, modal parameters, vibration, strain, and displacement indicators.
Monitoring Content
Monitoring scope and field constraints addressed by the deployment
Cable-stayed bridges required cable-force evaluation from static and dynamic operating conditions.
Modal testing required synchronized vibration data across separated measurement areas and later data alignment for parameter identification.
Long-term bridge safety monitoring needed cable force, vibration, strain, and displacement indicators rather than isolated inspection snapshots.
System Configuration
Configured system architecture and data path
Field Devices
DL-SEN cable-force, acceleration, strain, and displacement sensors installed on stay cables, main span, bridge deck, box girder, and support locations
Communication Layer
Synchronized DL-DAQ systems collect dynamic and static channels, with batch data alignment where bridge areas are tested separately
Central Platform
DL-SHM systems for cable force calculation, modal analysis, vibration trend review, and long-term structural safety reporting
Case Visual Evidence
Source visuals and deployment references
Long-span bridge monitoring environment
River-crossing bridge context for cable force, vibration, and long-term health monitoring.
Cable-force sensor installation
A cable-force sensor is fixed to a bridge member to support stay-cable force and vibration review.
Cable-force frequency and waveform output
FFT and vibration waveform data support cable frequency extraction and cable-force calculation.
Cable-stayed bridge and field sensor reference
Bridge site and cable sensor imagery from source materials supports the cable-force monitoring scenario.
Cable-stayed bridge sensor reference
Stay-cable and sensor installation references support long-term cable health monitoring.
Sensor Deployment
Sensor layout and measurement purpose
Stay cables
DL-SEN cable-force sensors and acceleration sensors
Measure cable force, fundamental frequency, and dynamic cable behavior
Bridge deck and main span
DL-SEN low-frequency acceleration sensors
Capture natural excitation and traffic-induced vibration for modal analysis
Deck, box girder, and support nodes
DL-SEN strain and displacement sensors
Track structural response, deflection-related behavior, and load-path changes
Bridge monitoring station
DL-DAQ systems and DL-SHM systems
Synchronize acquisition, align batches, calculate modal parameters, and manage long-term safety outputs
Data Analysis Results
Monitoring indicators and interpretation
Cable force monitoring
44-cable and 200-channel project scopes represented
The architecture supports both campaign cable testing and permanent cable-force monitoring.
Modal analysis
natural frequency, mode shape, and damping outputs
Bridge stiffness and dynamic characteristics could be identified from vibration records.
Dynamic vibration monitoring
deck, cable, and main-span vibration trends
Long-term vibration indicators supported structural safety review and maintenance planning.
Engineering Credibility
Reliability, topology, and project validation
99.98%
target data availability
IP67/68
field protection classes
4G/Fiber
site transmission options
RFQ
project-based configuration
Measurement planning
Monitoring object, measurement range, sampling rate, and signal type guide project configuration.
Communication options
DL systems support project configurations using wired, wireless, GNSS, and gateway-based communication methods.
Documentation support
Datasheets and technical selection information are available upon request for RFQ preparation.
Product selection should be confirmed against site conditions, measurement points, installation environment, and expected data output.
Structured RFQ Path
Request path for Civil Infrastructure Structural Monitoring Project
Step 1
Define Data Nodes
Sensor, wireless node, GNSS station, seismic unit, or DAQ field layer.
Step 2
Configure Network
Civil infrastructure, industrial equipment, heritage, seismic, or research monitoring chain.
Step 3
Build RFQ Scope
Asset type, measurement points, channels, sampling rate, communication, environment, and duration.
Step 4
Review Proposal
Receive system architecture, product configuration, data output, and engineering review structure.
Project Overview
Engineering context and monitoring scope
Bridge inspection teams required reliable structural evidence from highway bridges, river-crossing bridges, and cable-stayed bridges. Source projects included bridge modal testing, long-span bridge parameter identification, cable force testing under static and dynamic conditions, and online cable-force plus vibration monitoring for highway bridges.
Client type
Bridge inspection institutes, transport authorities, and cable-stayed bridge maintenance teams
System scale
modal tests with 25-40 measurement points, 44-cable cable force testing, and 200-channel cable-force plus vibration monitoring
Project type
Civil Infrastructure Structural Monitoring