Wireless Modal Test and Analysis System - WW-826D Wireless Modal Test and Analysis System - WW-826D

The WW-826D Wireless Modal Test and Analysis System, with built-in magnetoelectric velocity sensor and large-capacity rechargeable lithium battery pack, which can simultaneously collects data of multiple measurement points and transmit them to the computer in real time by using wireless synchronization and transmission technologies. WW-826D is widely used in the experimental modal analysis of structures that are difficult to be artificially excited, such as Bridges, large buildings and large mechanical equipment.

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  • Product Description
  • Specifications
  • System Configurations
  • Software
  • Modules/Accessories

 Compact, portable, directly installed in the measuring point

 With use of the modal analysis software, the vibration modes, natural frequencies and damping ratios of various 

    bridges and large buildings can be obtained conveniently and accurately

 Built-in large capacity rechargeable lithium battery, over 10h of battery life

 Built-in high sensitivity and low frequency velocity sensor, optional uniaxial, biaxial and triaxial test module

 Embedded a hardware primary integral circuit, the displacement can be directly measured

 Perfect signal conditioning, voltage amplification, anti - aliasing filtering

 Industrial grade wireless communication technology, strong anti-interference ability, communition distance up 

    to 300m (visual diantance)

 Highly real-time, real-time acquisition, real-time display, real-time storage, real-time analysis

Input SignalBuilt-in magnetoelectric velocity sensor
Full-scale Value6mm/s, 600mm/s (Low sensitivity, within the range of 0.13~39Hz (-3dB~+1dB))
0.12mm/s, 12mm/s (High sensitivity, within the range of 0.8~39Hz (-3dB~+1dB))
Indication Error<5% of F.S.
A/D Converter16-bit   Σ-Δ
Sampling Rate
     Low Comm. Rate10Hz, 20Hz
     High Comm. Rate (1-Ch and 2-Ch DAQ unit)10Hz, 20Hz, 50Hz, 100Hz
     High Comm. Rate (3-Ch DAQ unit)10Hz, 20Hz, 50Hz
Communication Modewireless industrial Ethernet
Communication Distance (Visual)
     Low Communication Rate

the distance between the nearest DAQ unit and controller ≤ 300m

the cascade distance of DAQ units 200m

     High Communication Ratethe distances between all DAQ units and controller  300m
Anti-aliasing filter
     Cut-off Frequency1/2.56 of sampling rate
     Stop-band Attenuation- 80dB/Oct.
     Flatness<±0.2dB (Within analysis frequency range)
Power Supplylithium battery, over 10h of battery life (Fully charged)
     Communication Controller151mm(L)×97mm(W)×94mm(H)
     1-Ch and 2-Ch DAQ Unit148mm(L)×95mm(W)×83mm(H) (Exclu. antenna)
     3-Ch DAQ Unit (Exclu. antenna)160mm(L)×160mm(W)×90mm(H) (Exclu. antenna)
     Communication ControllerApprox. 1.1kg
     2-Ch DAQ UnitApprox. 2.25kg (Inclu. sensor)
Environmental Conditions
     Operating Temperature- 10°C to 50°C
     Operating Humidity20 ~ 90%RH@40°C
     Storage Temperature- 40°C to 60°C
     Storage Humidity90%RH24h@50°C
     VibrationFrequency cycle range: 5Hz ~ 55Hz ~ 5Hz
Drive amplitude (peak): 0.19mm
Sweep frequency: ≤1Oct./min
Duration of resonant: 10min
Vibration direction: x, y, z

Figure 1  Single System Block Diagram

Figure 2  Multiple System Block Diagram (High Communication Rate)

Figure 3  Multiple System Block Diagram (Low Communication Rate)

 DE-BPS Basic Platform Software

  • Running on XP/Win7/Win8/Win10 operating system

  • Parameters setting, Function control, Real-time/post-acquisition analysis, data browsing, cursor readouts, scaling curve, data management and simple processing, report generation, long-term continuous data recording, etc.

 WW-826D DAQ Unit
  • Built-in high sensitive, low-frequency magnetoelectric velocity sensor, and optional of uniaxial, biaxial and triaxial sensor

  • Continuous sampling rate up to 1kHz

  • Wireless industrial Ethernet communication, wireless synchronization and transmission

  • Support multi-hop wireless extension, maximum communication distance up to 500m

  • Built-in lithium battery, over 10h of battery life                                                 

 WW-826D Communication Controller
  • Communicate with the computer via Ethernet

  • In the two modes of low communication rate and high communication rate, up to 30 DAQ units and 12 DAQ units can be controlled respectively and the data from them can be received

  • Multiple DAQ units within a radius of 500m can be controlled to sample in parallel

  • Built-in intelligent lithium battery pack


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