FD-GT-20 Digital TFT Color Display Ultrasonic Railway Flaw Detector
HUATEC FD-GT-20 rail flaw detector is the third generation of Goworld's all-digital products with TFT color display and lightweight trolley used for railway system. In accordance with TB/T 2340-2012 UT Rail Tester standard issued by Ministry of Railway(China), this equipment is capable of the detection job for rails ranging 43~75kg/m in type. It is applicable to railway, high-speed railway and subway.
Technical Specifications
| Channel |
10 channels: 9 inspection channels and 1 calibration channel. |
| Probe type |
Different angle Dual-element probes with frequencies between 2 - 2.5 MHz, including 6 70° probes, 2 37° probes, and 1 0° probe. |
| Receptacle |
BNC |
| Probe arrangement and detection area |
Comprehensive detection of damage to all major parts of the rail, including:
2 70° probes scan the left side of the rail head
2 70° probes scan the middle of the rail head
2 70° probes scan the right side of the rail head
2 37° probes scan rail waist(screw cracks and other oblique cracks)
1 0° probe scans the rail head, rail waist, rail bottom, screw hole horizontal crack
|
| Frequency Range |
1.5MHz～3.0MHz |
| Gain |
0～80dB |
| Rejection |
Off, large |
| Dynamic Range |
Not less than 16dB with min rejection, 2~6dB with max rejection |
| PRF |
400Hz per channel |
| Displaying Mode |
A-scanB-scanA+B scan |
| Detect range |
Can be adjusted manually or automatically according to the selected rail type |
| Attenuator error |
Operating error per 12dB does not exceed ±1dB |
| Vertical Linerity error |
≤1% |
| Horizontal Linearity error |
≤15% |
| Amplifier band |
-3dB 1.5MHz～3.0MHz |
| Blocking range |
Not bigger than 20mm |
| The effect of suppression state on measurement results |
When the suppression of the instrument is in different states, the amplitude difference is 10 dB±2 dB, the change ΔM of the difference between the two echoes is not more than 2 dB. |
| The effect of operating voltage on echo height and flaw detection (alarm) sensitivity of flaw detector |
Within the rated operating voltage range, the gate position and alarm level of the flaw detector should be no significant change, and the variation of the echo amplitude ΔNd and the detection (alarm) sensitivity change ΔSd are not more than 1 dB. |
| Digital sampling error |
The maximum to minimum signal amplitude variation should not be greater than ±5% of the screen height |
| Digital flaw detector response time |
The response time of the digital flaw detector should not exceed 5ms. |
|
Distance amplitude
characteristic
|
The transverse wave probe detects transverse holes with the same aperture and different sound paths; the 0° probe detects the large flat bottom with different sound paths, and the difference ΔW of the reflected wave height should meet the following requirements:
0° probe: ΔW ≤ 12dB in the range from the depth of 20mm to the highest range of the range amplitude characteristic curve; ΔW ≤ 8dB in the range from the highest point of the distance amplitude characteristic curve to the depth of 150mm:
37° probe: ΔW≤12dB in the range from the depth of 20mm to the highest range of the range amplitude characteristic curve; ΔW≤8dB in the range from the highest point of the distance amplitude characteristic curve to the depth of 150mm;
70° probe: ΔW ≤ 12 dB in the range from 10mm to 70mm corresponding to the detection depth.
|
| SNR |
O° probe: Detect the bottom surface on the test block, when the wave height reaches 80%, the static sensitivity margin is greater than or equal to 24 dB; the signal-to-noise ratio is not less than 16 dB.
37° probe: detect the screw hole and the 3mm upper crack at 37° inclination on the test block, make the two waves equal, when the wave height reaches 80%, the static sensitivity margin is greater than or equal to 22dB; signal-to-noise ratio not less than 8dB.
70° probe: On the test block, the secondary wave is used to detect the φ4mm flat bottom hole. When the wave height reaches 80%, the static sensitivity margin is greater than or equal to 20dB; the signal-to-noise ratio is not less than 10dB.
|
| Sensitivity Surplus |
0° probe: detect the 110mm bottom surface of the test block, when the wave is as high as 80%, the sensitivity margin is not less than 36dB
37° probe and 70° probe: Detect Φ3×65 transverse through hole on test block, the sensitivity margin is not less than 40dB when the wave is as high as 80%
|
| Dynamic flaw detection capability (defect detection capability) |
With 0°, 37°, 70° rail-specific probes, all manual defects on the rail comparison test block except the 15° downward crack can be found and corresponding alarm indications issued. |
| Alarm gate adjustment mode |
The starting position, width and level of the alarm gate can be adjusted manually |
| Alarm mode |
Real-time alarm (incoming wave alarm and losing wave alarm)
Screw hole double wave alarm
Delay one out of two alarm
|
| Alarm indication |
Sound and light alarm mode, alarm volume and frequency can be adjusted. |
| Waveform measurement |
Automatically measure and display the highest wave sound path, horizontal and vertical distance in the gate. |
| Gain curve |
User can adjust the gain curve (8 points) according to actual needs. |
| Flaw detection record |
Full data record (up to 50 km), data can be exported and played back |
| Operation input method |
Touch screen input |
| Display |
Resulotion1280×800 |
| Touch screen |
Capacitive, high-strength, scratch-resistant,
support handwriting
|
| Ports |
USB 2.0
LAN 100Mbps
WIFI 802.11 a/b/g/n
bluetooth BT 4.0
|
| Power |
DC 12V (lithium battery pack) |
| Working time |
≥8h |
| Water tank capacity |
≥20L |
| B type image display accuracy |
Both ordinate and abscissa are 2mm |
| Code wheel accuracy |
2mm |
| Flaw detection speed |
Max 5.0km/h |
| Working temperature |
-15℃～45℃ |
| Dimension |
The overall dimensions of the vehicle in working condition are about 780mm × 290mm × 1006mm. |
| Weight |
The frame is about 24kg; the ultrasonic instrument is about 2.4kg; the instrument battery is 830g; the operation terminal (three-proof tablet computer) is 730g; the trolley equipped with 5 groups of probes is about 1.4kg. |
1. Introduction to FD-GT-20 Digital Rail Ultrasonic Flaw Detector
FD-GT-20 rail flaw detector is the third generation of HUATEC Group all-digital products with TFT color display and lightweight trolley used for railway system. In accordance with TB/T 2340-2012 UT Rail Tester standard issued by Ministry of Railway(China), this equipment is capable of the detection job for rails ranging 43~75kg/m in type. It efficiently spots various flaws at head, web and flange of a rail, applicable to railway, high-speed railway and subway.
The instrument adopts ultrasonic host + operation terminal mode and connects via wireless WIFI. While improving the customer's operation experience, the instrument's Internet plus function can be expanded to realize variety of functions such as human-machine detection separation, data online, offline real-time storage, GPS positioning, data cloud storage, etc. And you can customize your own ultrasonic operation terminal according to the customer's own needs.
2. Features
(1) Trolley frame is compact, durable and easy to maintain;
(2) Large-capacity integrated toolbox water tank;
(3) Integral lifting probe holder, probe is easy to remove and replace;
(4) Small size and portable, with industrial three-proof touch panel;
(5) Excellent performance indicators, in line with relevant standards;
(6) Support GPS positioning, data cloud storage, automatic speech recognition and other functions;
(7) A functional application that meets the needs of flaw detection.
3. Trolley appearance structure
4. Instrument appearance structure
The instrument is small and portable, the overall dimensions: 94X222X225mm, net weight is about 1.8kg
5. Large-capacity integrated toolbox water tank
The plastic water tank, filled with water is 20L.
6.Integrated probe holder
All the probes are closed at the bottom of the car, which can be lifted or removed in a single way, and the probe can be removed and replaced more conveniently.
7. Industrial three-proof tablet
Industrial three-proof touch screen tablet, dustproof, waterproof and shockproof.
8. Instrument-specific flaw detection application software
For the operating characteristics of the touch panel, specially designed application software makes function selection and parameter adjustment easier.
9.Computer flaw detection data playback software
Data playback speed is adjustable, supporting intelligent playback, event screening, statistics, data search, printing, export and other functions.
Appendix 1. Features and Features
- The host appearanceis compact, sturdy and light, and the assembly and disassembly are simple. Good environmental adaptability, working environment temperature -15 °C ~ 45 °C, continuous working time is not less than 8 hours, anti-vibration and anti-interference, protection grade IP65.
- The host has multiple flaw detection channels (multiple probes can be connected at different angles), and the sequential time-sharing cycle works.
- The 0, 37 and 70 degree probes are designed to fully detect the main parts of the rail.
- The host structure is in the form of "server + client". "Server" , the host (without input and display), is a 1- N channel ultrasound module; "client" is the operation terminal (input and display), host and client (operation terminal) through the wired network LAN (or wireless WIFI) connection for network communication.
- Negative square wave pulse excitation mode transmitting circuit
- The analog filter increases the host signal to noise ratio.
- The channel gain is a combination of “basic gain” + “compensation gain”.
- The detection range, material sound velocity, and pulse shift are automatically set according to the selected rail type.
- The functions of the conventional ultrasonic basic parameters are manually adjustable (detection range, material sound velocity, probe zero point, leading edge, angle, gate starting position, width and level, etc.).
- With rejection function.
- The channel repetition frequency is fixed at 400 Hz per channel.
- With channel proofing function.
- It has A, B and A+B display functions.
- With sound and light alarm function.
- With voice prompt function.
- The car implementation process has an overspeed warning function.
- It has the function of automatically measuring the sound path, horizontal and vertical distance of the highest wave in the alarm gate.
- It has marking function (injury, track number, car advance, pull back, etc.).
- Built-in compensation curve function, the curve can be edited (new, modified, deleted).
- The alarm volume and frequency can be adjusted for each channel.
- With detection probe coupling failure function.
- Channel gate, waveform, alarm indication, probe direction indication, probe angle indication, B display channel color customization function.
- With the display interface background color customization function.
- The user can customize the additional job parameter.
- Flaw detection full record function
- Flaw detection data management functions (save, delete, recall, playback, export).
- The host and operation terminal software can be upgraded through an external USB flash drive.
- With touch screen operation input function, external Bluetooth keyboard can be connected.
- With GPS location information function.
- With instant speed display.
- With mileage proofing function.
- It has a punching function.
- Waveform freeze function.
- Network communication(Connected to the operating terminal)
- Play back data on your computer
- With instrument software operation demonstration function, can be used for instrument user training
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