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.
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 Signal | Built-in magnetoelectric velocity sensor |
| Full-scale Value | 6mm/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 Converter | 16-bit Σ-Δ |
| Sampling Rate | |
| Low Comm. Rate | 10Hz, 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 Mode | wireless 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 Rate | the distances between all DAQ units and controller ≤ 300m |
| Anti-aliasing filter | |
| Cut-off Frequency | 1/2.56 of sampling rate |
| Stop-band Attenuation | - 80dB/Oct. |
| Flatness | <±0.2dB (Within analysis frequency range) |
| Power Supply | lithium battery, over 10h of battery life (Fully charged) |
| Dimensions | |
| Communication Controller | 151mm(L)×97mm(W)×94mm(H) |
| 1-Ch and 2-Ch DAQ Unit | 148mm(L)×95mm(W)×83mm(H) (Exclu. antenna) |
| 3-Ch DAQ Unit (Exclu. antenna) | 160mm(L)×160mm(W)×90mm(H) (Exclu. antenna) |
| Weight | |
| Communication Controller | Approx. 1.1kg |
| 2-Ch DAQ Unit | Approx. 2.25kg (Inclu. sensor) |
| Environmental Conditions | |
| Operating Temperature | - 10°C to 50°C |
| Operating Humidity | 20 ~ 90%RH@40°C |
| Storage Temperature | - 40°C to 60°C |
| Storage Humidity | 90%RH24h@50°C |
| Vibration | Frequency 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 | |
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| WW-826D Communication Controller | |
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