Showing results: 31 - 32 of 32 items found.
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Material Sensing & Instrumentation
MSI Time-Domain-Reflectometry (TDR) Structural-Health Monitoring probes the structural health of a composite part by propagating a fast electrical pulse along a distributed linear sensor which has been fabricated directly in the laminate. The sensor is formed from the native graphite fibers already used in composite manufacture, and constitutes zero defect. Fibers are patterned into a microwave waveguide geometry, or transmission line, and interrogated by a rapid pulse as shown below. Structural faults along the line cause distortions in waveguide geometry, producing reflected pulses similar to radar. Cracking, delamination, disbonds, moisture penetration, marcelling, and strain are all detected by propagation delay, for sensor lengths up to several meters.
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LSP-5KVA -
Lisun Electronics Inc.
• Circuit Type: (IGBT) MPWM Pulse Duration Modulation • Input: 1 Phase 220V±10%, 50Hz/60Hz±5% • Output Voltage: HIGH/LOW Adjustable 1)1 Phase Voltage Range: (HIGH)0～300V, (LOW)0～150V 2) Nominal Voltage: +10%～+25%, -10%～-30% • Output Frequency: 50Hz, 60Hz, adjustable between 45 and 70 Hz, 400Hz • Load Voltage Stabilization Rate: ≦0.5% • Frequency Stabilization Rate: 0. 1% (Fix Point 50Hz, 60Hz and 400Hz) • Wave Distortion Rate: ≦2% (Resistor Load); Efficiency: ≧85% • Output Instruments: Frequency Indicator, 4-digits RMS digital frequency indicator, resolution is 0.1Hz Voltage Meter, 4-digits RMS digital voltage meter, resolution 0.1V Ampere Meter, 4-digist RMS digital ampere meter, resolution 1Ma Power Indicator, 4-digits RMS digital power indicator, resolution 1W Power Factor Meter Resolution 0.001 • Protective Devices: Over load, short circuit, over voltage, over current, over temperature protective and alarm devices • Operating Environment: Temperature 0～40℃ Relative Humidity 0～90%
