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UDS2-77 Ultrasonic Single Rail Flaw Detector

UDS2-77 ultrasonic single rail flaw detector UDS2-77 ultrasonic single rail flaw detector

 THE FLAW DETECTOR ADVANTAGES:

  • Rail complete sounding (excluding the foot flanges), due to the flaw detector multi-channeling.
  • Built-in standard setups for channels operation.
  • Defining the traveled distance and speed during the complete testing.
  • Real-time display of testing results in B-scan mode (by 4 channels).
  • Sounding and storing the information in every millimeter of traveled distance via all channels is provided in the flaw detector.
  • Recording the testing results at different sensitivity levels.
  • Registration of all testing results and advanced capabilities of data analysis.
  • Application of the flaw detector with the base sounding scheme allows to detect all types of fatal defects, appearing while rail track maintenance.

Fig. Displaying the testing results in A-Scan and B-Scan modes on the flaw detector screen

DISTINCTIVE FEATURES:

  • Large high brightness color TFT display.
  • Synchronization by encoder.
  • Result display: А-scan, B-scan.
  • Number of channels for complete testing: 13.
  • Number of channels for manual testing: 2.
  • Techniques and schemes for rail head sounding.
  • Application of base and additional schemes for rail sounding:
          - Pulse echo technique by angle-beam probes for testing of gauge and field face sides along and against the movement.
          - Pulse echo by angle-beam probes for testing of the rail head center along and against the movement.
          - Echo-mirror technique by angle-beam probes for testing of the rail head center along and against the movement.
          - Echo-mirror for testing of gauge and field face sides along and against the movement.

  

Fig.  Pulse echo techniques for the rail head testing

  

Fig. Echo-mirror techniques for the rail head testing

  • Techniques and schemes for the web sounding and its projection into the foot:
          - Pulse echo and echo-images techniques for detection of longitudinal horizontal cracks with straight-beam dual element transducer.
          - Pulse echo technique for detection of transverse cracks and testing of weld joints with angle-beam transducer.

Fig. Pulse echo techniques for the rail web and foot testing

UDS2-77 MAIN SPECIFICATIONS
Overall dimensions of flaw detector without a handle and with one ultrasonic unit and power unit no more than (1040×1640×1130);
in transport position – no more than (900×2060×600) mm
Equipped flaw detector weight no more than 21 kg
Keypad English, Russian
Languages English, Russian
Number of multiplexer units (MUX) 4
Number of ultrasonic channels 14 channels
Connectors BNC, RS-19
Data storage Flash-card
Independent power source NiMH storage battery with rated voltage 12 V and rated capacity 17 А∙h
Operation time 8 hours
Flaw detector consumed electric power no more than 30 V·А
Time of flaw detector operation mode setup no more than 15  sec.
Display type 800×480 pixels
Screen dimensions (width, height, diagonal) 155 mm, 95 mm, 180 mm (7,5 inch)
Warranty 1 year
INTERFACES
USB USB-A (host), USB-B (slave)
Trigger O available
Headphones available
Encoder output 1 axis encoder line
 MAIN METROLOGICAL PERFORMANCES
Temporal instability of sensitivity of flaw detector reception path 0.5 dB for 8 hours of continuous operation
Protection level in operation IP 64
Ambient temperature from minus 400 to plus 500 С
Atmospheric pressure from 84 to 106.7 kPa
Relative humidity (93 ± 3) % at a temperature of 25 ºС
Full average flaw detector lifetime no less than 10 years
Non-failure operation no less than  0.9 for 2 000 h
PULSER
Initial pulse type short pulse of negative polarity
Initial pulse frequency one channel mode – 250 Hz; complete mode – no more than 1000 Hz
Amplitude 180 V
Duration 60±10 ns
Rising edge duration no more than 20 ns
Synchronization type from the initial pulse, from the encoder
RECEIVER
Gain from 0 to 100 dB with a step of 0.1, 1, 10 dB
Input signal no more than 2 V from peak to peak
Input resistance of reception path no more than 300 Ω
Digital filter 1 standard digital filter with a centre frequency of 2.5 MHz
Rectifier envelope
SETUPS MODE
Measurements mm
Testing range from 0 to 1000 mm, with a step of 1, 10, 100 mm
Velocity from 2000 m/s to 8000 m/s, with a step of 1, 10, 100, 1000 m/s
Probe zero from 0 to 60 µs, with a step of 0.1, 1 µs.
Range delay from 0 to 1000 µs,  with a step of 1, 10, 100 µs
Refracted angle from 0 tо 900, with a step of 100, 1000
ALARM system
Sound ALARM system sound – separate for each rail and common (for a group of channels)
range of pulse frequency setup of sound indicator of alarm system is from 0.5 to 5 kHz, with setup resolution 100 Hz
Light ALARM light – separate for each rail and common (via all sounding channels); visual by the screen – separate for each rail and each channel.
MEASUREMENT  IN A-SCAN MODE
Displayed parameters 4 measured parameters are displayed in a status bar
  • А – echo amplitude from the defect relative to the ALARM level, dB
  • S – distance “by the beam” to the defect
  • X – defect depth coordinate, mm
  • Y – defect depth coordinate, mm
TCG curve max. number of dots in a gate – 14, dynamic range – 100 dB, vertically adjustable step -1 dB, horizontally adjustable step – 2 dB.
MEASUREMENTS IN B-SCAN MODE
“Raw” B-Scan
  • А – max. echo amplitude from the defect relative to the screen center, dB
  • H – distance “by the beam” to defect, the echo signal from which has the max. amplitude, mm
  • dH – conditional length “by the beam”, mm
  • L  – coordinate along the scanning path to defect, the echo signal  from which has the max. amplitude, mm
  • dL  – conditional defect length, mm. 

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