The flaw detector is intended for defect detection on the running surface of both rails and in the rail cross-section, excluding rail base blades. It employs a flaw detection trolley for continuous testing and manual probes for confirmatory testing of individual rail cross-section segments and welded joints.
Flaw detector advantages
Flaw detector distinctive features
Fig. Echo techniques for railhead testing
Fig. Echo-mirror techniques for railhead testing
Fig. Echo techniques for testing the web and base
The flaw detector using the standard scanning schemes enables detecting all types of fatal defects with the following features:
Fig. – Types of sharp-defective rails
Instrument Service Functions
Fig. Modes of testing results display in A-scan and B-scan on the flaw detector screen
Additional Software
“LuCH-Controller 1.6” is intended for viewing and analyzing test results of UDS2-73 ultrasonic rail flaw detector, as well as for interpretating and displaying information on suspicious rail sections. The present program facilitates operation with the data stored on a PC.
Main advantages of program application are:
| Overall dimensions of flaw detector without a handle and with one ultrasonic unit and power unit | no more than (1040×1640×1130) mm; in transport position – no more than (900×2060×600) mm. |
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| Equipped flaw detector weight | no more than 75 kg. | |
| Keypad | English, Russian. | |
| Languages | English, Russian. | |
| Number of ultrasonic units | 4 | |
| Number of ultrasonic channels | 28 channels. | |
| Connector types | BNC, RS-19. | |
| Data storage | Flash card. | |
| Independent power source | NiMH storage battery of 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 resolution | 800×480 pixels. | |
| Screen dimensions (width, height, diagonal) | 155 mm, 95 mm, 180 mm (7.5 inches). | |
| Warranty | 1 year. | |
| Interfaces | ||
| USB | USB-A (host), USB-B (slave). | |
| Trigger O | available. | |
| Headphones | available. | |
| Encoder output | Single-coordinate encoder. | |
| Main metrological performances | ||
The limits of admissible main absolute error of flaw detector during the measurement of depth dН and coordinates ,  of defects depth |
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| The limits of admissible main absolute error during the measurement of signals amplitudes ratio ∆N at the reception path input in the gain range from 20 dB to 80 dB | ∆N = ±(0.2+0.03N);
∆N ─ main absolute error during signals amplitudes ratio measurement, dB; |
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| Time instability of flaw detector reception path sensitivity | ± 0.5 dB for 8 hours of continuous operation. | |
| Protection level in operation | IP 64 | |
| Ambient temperature | from minus 400 to plus 500С. | |
| Atmospheric pressure | from 84 to 106,7 kPa. | |
| Relative humidity | (93 ± 3) at a temperature 25 ºС. | |
| Flaw detector in shipping package is resistant to the influence of |
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| Flaw detector retains its parameters when it is influenced by electromagnetic interferences which do not exceed the following norms |
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| Full average flaw detector lifetime | no less than 10 years. | |
| Probability of no-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 an initial pulse, from an 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 a peak to a peak. | |
| Input reception path resistance | no more than 300 Ω. | |
| Digital filter | 1 standard digital filter with central frequency 2.5 MHz. | |
| Rectifier | envelope. | |
| Setups mode | ||
| Measurements | mm | |
| Testing range | from 0 to 1000 mm, with a step 1, 10, 100 mm. | |
| Velocity | from 2000 m/s to 8000 m/s, with a step 1, 10, 100, 1000 m/s. | |
| Probe zero | from 0 to 60 µs, with a step 0.1, 1 µs. | |
| Range delay | from 0 to 1000 µs, with a step 1, 10, 100 µs. | |
| Probe angle | from 0 to 900, with a step 10, 100 | |
| Cycles/gates | ||
| Number of cycles | max. number of cycles 16. | |
| Cycle duration | 0.01 – 0.4 ms. | |
| Number of gates in a cycle | max. number of gates 2 for each channel. | |
| Gate fixation level | from 0 % to 100 % of vertical screen scale. | |
| ALARM | When the signal goes beyond the ALARM level, when the signal stays within the ALARM level. | |
| ALARM system | ||
| Sound ALARM system | sound – separate for each rail and combined (for a group of channels);
range of pulse frequency setup of alarm system sound indicator is from 0.5 to 5 kHz, with a step 100 Hz. |
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| Light ALARM | light – separate for each rail and combined (via all ensounding channels); visual by the screen – separate for each rail and each channel. |
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| Measurements in A-scan mode | ||
| Displayed parameters | 4 measuring parameters are displayed in a status bar. | |
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| TCG curve | max. number of points is 14 per cycle, dynamic range 100 dB, vertical setup step 1 dB, horizontal – 2 mm. | |
| Measurements in B-scan mode | ||
| “Raw” B-scan |
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Designed by Minima Studio
