Dynamic Signal Test and Analysis System - DE-944
The DE-944 is a high-performance testing system specifically designed for strength and life evaluation of large-scale structures. Featuring a robust 19-inch rackmount chassis and dual-interface communication options, this system delivers exceptional testing capabilities for demanding engineering applications.
Independent 24-bit A/D converter per channel with the sampling rate of up to 256kHz
Built-in bridge completion and Excitation
Built-in 24V/4mA biasing circuit, support IEPE sensors
Built-in low-pass filter and anti-aliasing filter
Suport EID and TEDS
On-site self-checking function of stress/strain channels is supported to get the current state quickly
| Name | Detail |
|---|---|
| Number of input channels | 4 channels/card, 8/16 card slots |
| Input Coupling | GND, Sin-DC, Dif-DC, AC, Sin-IEPE, Dif-IEPE |
| Input Impedance | 10MΩ + 10MΩ |
| Input Voltage Range | ±0.1V, ±0.2V, ±0.5V, ±1.0V, ±2.0V, ±5.0V, ±10.0V |
| Indication Error | 0.2% of F.S. |
| Stability | 0.01%/24h |
| Nonlinearity | 0.1% of F.S. |
| Channel to Channel Isolation | >=80dB |
| Noise | ≦3μVRMS |
| Strain Measurement | |
| Input Strain Range | ±1000με, ±10000με, ±100000με |
| Indication Error | ≦0.5%±3με |
| Zero Drift | ≦3με/2h |
| Self-Balancing Range | ±20000με |
| Bridge Excitation | |
| Bridge Configuration | Full, half, three-wire quarter bridge |
| Bridge Completion Resistors | 120Ω / 350Ω (Three-wire quarter bridge) |
| Resistors | 50Ω ~ 10000Ω (Half bridge / Full bridge) |
| Bridge Voltage | 2V, 5V, 10V, 24V DC |
| Max. Current | 30mA |
| LPF | |
| Cut-off Frequency (-3dB±1dB) | 30Hz, 300Hz, 3kHz, PASS |
| Flatness | <0.1dB Within 1/2 of cutoff frequency |
| Stop-band Attenuation | >-18dB/Oct. |
| Communication | Gigabit Ethernet / USB 3.0 |
| A/D Converter | 24-bit A/D |
| Freq. Response |
DC~100kHz (+0.5dB ~ -3dB) 32 simultaneous inputs, up to 200kHz per channel. Over 32 simultaneous inputs, up to 128kHz per channel. |
| Anti-aliasing filter | |
| Cut-off Frequency | 1/2.56 of sampling rate |
| Stop-band Attenuation | >-120dB/Oct. |
| Flatness | ±0.05dB Within analysis frequency range |
| Power Supply | 100–240VAC / 10–30VDC, 160W (32 channels) / 320W (64 channels) |
| Dimensions | 237×133×338mm (semi 19″ chassis) 482×133×388mm (19″ chassis) |
| Weight | Approx. 7kg (semi 19″ chassis with 32 channels) Approx. 12kg (19″ chassis with 64 channels) |
| Environmental Conditions | |
| Operating Temperature | -10 to 50°C |
| Operating Humidity | 20–90%RH @40°C |
| Storage Temperature | -40 to 60°C |
| Storage Humidity | 90%RH 24h@50°C |
| Vibration Resistance |
Frequency cycle range: 5~55~5Hz Drive amplitude (peak): 0.19 mm Sweep frequency: <1 Oct./min Duration of resonant: 10min Vibration direction: x, y, z |
Figure 1 Single System Block Diagram
Figure 2 Multi-System Block Diagram
DE-BPS Basic Platform Software
Core Feature
Integrated Analysis Modules
Data acquisition and basic signal processing
Order analysis and field dynamic balancing
Impact waveform detection
Experimental modal analysis
Acoustic analysis
Smart Operation System
Modular management for simplified workflow
Automatic system parameter identification
Fully programmable instrument settings (range, filtering, sampling)
Virtual instrumentation with one-click configuration
Technical Specifications
Unified Platform Architecture
Supports multiple DAQ system types on single platform
Visual parameter configuration with real-time status monitoring
Data Management
Intelligent project organization for large-scale experiments
Batch processing and automated report generation
Multiple sampling modes (triggered/continuous)
Advanced Analysis Capabilities
Flexible channel grouping
Custom data flow configuration
Real-time processing (acquisition, storage, display, analysis)
Visualization Tools
Global data navigation
Multiple display modes:
Digital tables and bar charts
X-Y plotters and FFT views
Octave analysis, 2D/3D visualization
Reporting & Output
Interactive Word report generation
Multi-format export capabilities
Customization & Expansion
Open development interface
Plugin architecture for user-created modules
Shared plugin repository
Distributed System Support
Multi-client operation:
Main control terminal (full system control)
Display terminals (remote monitoring)
View layout management for field applications
Selective data storage based on bandwidth
DE-944 DAQ Card
4 input channels
Support GND, Dif-DC, Sin-DC, AC, Sin-IEPE, Dif-IEPE, three-wire 1/4 bridge, 1/2 bridge and full bridge input
Full-scale voltage value from ±0.1V to ±10.0V
Full-scale strain value from ±1000με to ±100000με
Independent 24-bit A/D converter per channel with continuous sample rates of up to 256kHz
System uncertainty within 0.2% of F.S.
Frequency response range from DC to 100kHz
DE-92U Semi-19" 3U chassis
CPU based on on-chip system (SOC)
8 Card Slots
Including control card, Gigabit Ethernet communication Interface
100 ~ 240VAC / 12VDC power supply
DE-93U 19" 3U chassis
CPU based on on-chip system (SOC)
16 card slots
Including control card, Gigabit Ethernet communication Interface
100 ~ 240VAC / 12VDC power supply
DT5857-8 Charge Conditioner (Optional)
1 input channel
Max. input charge: 105pC
Input Impedance: >1011Ω
Amplifier output sensitivity: 0.1mV/pC and 10mV/pC
Indication error: <1%
Noise:<10×10-3pC
Max. bandwidth: 0.3Hz ~ 1MHz (+0.5dB ~ -3dB)
Distortion:<0.5％ (<30kHz)
DT5856-8 IEPE Quadratic Integral Conditioner (Optional)
Built-in 24V/4mA biasing circuit
Amplifier bandwidth: DC ~ 300kHz (+0.5dB ~ -3dB)
Distortion:<0.5％(within 30kHz)
Integral type: No integral, Primary integral, Quadratic integral
Integral Frequency Range:
Primary integral: 10Hz ~ 10kHz or 1Hz ~ 1kHz
Quadratic integral: 10Hz ~ 1kHz or 1Hz ~ 100Hz
Integral Error：
Primary integral:<3%
Quadratic integral:<5%
Dimensions: 50mm(W)×35mm(H)×110mm(L)
DT3814-8 Thermistor Conditioner (Optional)
1 input channel
Suitable for Pt10, Pt100, Pt1000 sensors
Measuring temperature range from -200℃ to 850℃
Accuracy: 0.5%±0.5℃
Iout:1mA±2μA
DT3811-8 Current Loop Conditioner (Optional)
1 input channel
Suitable for 2-wire / 3-wire 4 ~ 20mA sensor
24V DC power supply
TC-01 Tachometer / Counter Module (Optional)
Number of channel：2 input channels
Rotation rate measurement
Range: 30 ~ 600000 rpm
Accuracy: ˂0.05%±1r
Input signal pulse width: ≥10μs
PPR: 1 ~ 4096
Counter measurement
Operating mode: support positive/reverse, pulse accumulative count, pulse count per unit time
Reset mode: manual/atuomatic
Pulse count range: 0 ~ 100k/s
Power supply: 5VDC/50mA
DT5944 Signal Source Output Card (Optional)
Number of Channel: 2 channels
Voltage Range: ±10VP
Current: Max. 5mA
Frequency: 0.1 ~ 20kHz
D/A Resolution: 24 bits
Accuracy: 1% within 2kHz
Signal type: constant frequency sine wave, sweep frequency sine wave, square wave, random, burst random
DT5945 CAN Bus Card (Optional)
Number of channel：2 channels
Protocol: CAN2.0B
Baud rate: 4800bps ~ 1Mbps
Communication mode: duplex CAN bus for sending and receiving
Minimum sending interval: 1s
Support dbc file import
Supports standard and extended frame formats
DT5946 RS485 Communication Card (Optional)
Number of channel：2 channels
Baud rate: 1200bps ~ 115200bps
DT5947 Digital I/O Card (Optional)
Number of channel: 8-Ch DI and 8-Ch DO
Digital input: Support Dry/Wet Contact
Digital output: Power Output (Ch1-Ch4) and TTL Output (Ch5-Ch8)
Power Output: Max. 24V/1A
DT5611A Synchronization Box (Optional)
8 inputs
Built-in synchronization clock distributor
Support multiple clock box cascade connection
19" 1.5U chassis.
C-4 Cable
4-core cable
Default 5m bare cable or 1.5 m cable with bridge box