GT-20 type rail ultrasonic flaw detector Introduction
The GT-20 rail flaw detector is a railway-specific all-digital, lightweight hand-push rail ultrasonic flaw detection equipment. The equipment fully meets the requirements of the Ministry of Railways TB/T 2340-2012 "rail ultrasonic flaw detector" standard, suitable for the detection of 43kg / m ~ 75kg / m rail, can effectively detect the rail head, rail waist, rail bottom Various defects, suitable for various rail inspection applications such as iron, high-speed rail and subway. The instrument adopts the ultrasonic host + operation terminal mode and connects via wireless WIFI. While improving the customer's operation experience, the instrument's Internet + function can be expanded to realize human-machine detection separation, data online, offline real-time storage, GPS positioning, data cloud storage, etc. Kind of function. And you can customize your own ultrasonic operation terminal according to the customer's own needs. Features
The frame structure of the trolley is compact, durable and easy to maintain.
Large-capacity integrated toolbox water tank.
One-piece probe holder for easy removal and replacement of a single probe.
The instrument is small and portable, and the industrial three-proof touch panel.
Excellent performance indicators and meet relevant standards.
Support GPS positioning, data cloud storage, automatic speech recognition and other functions.
A feature-rich application for your flaw detection. Technical parameters
Number of channels: 10 channels: 9 detection channels, 1 proofing channel
Probe type: Different angle dual crystal probes with frequencies between 2MHz and 2.5MHz, including 6 70° probes, 2 37° probes, and 1 0° probe
Probe interface: Q9
Probe arrangement and detection area: Fully detect the main parts of the rail. Among them: 2 70° probes scan the left side of the rail head; 2 70° probes scan the middle of the rail head; 2 70° probe scan rails Right side of the head; 2 37° probes to scan the rail waist (spiral hole cracks and other oblique cracks); 1 0° probe to scan the rail head, rail waist, rail bottom, screw hole horizontal crack
Channel operating frequency: 1.5MHz ~ 3.0MHz
Gain adjustment range: 0~80dB
Suppression: closed, large
Dynamic range: no less than 16dB when the suppression is minimum, 2dB~6dB when the maximum is suppressed
Repeat frequency: 400Hz per channel
Waveform display mode: A type, B type or A+B type display simultaneously
Detection range: can be adjusted manually or automatically according to the selected rail type
Attenuator error: ±12dB per 12dB of operating error
Horizontal linearity error: ≤1%
Vertical linearity: ≤15%
Amplifier band: -3dB 1.5MHz~3.0MHz
Blockage range: no more than 20mm
Effect of suppression state on measurement results: When the suppression of the instrument is in different states, the amplitude difference is 10dB±2dB. The variation of the difference between two echoes ΔM is not more than 2dB.
Impact of operating voltage on the echo height and flaw detection (alarm) sensitivity of the flaw detector: Within the rated operating voltage range, the gate position and alarm level of the flaw detector should be unchanged, the change in echo amplitude ΔNd and the sensitivity of the flaw detection (alarm) The change ΔSd is not more than 1dB
Digital sampling error: The maximum to minimum signal amplitude variation should not be greater than ±5% of the screen height
Response time of digital flaw detector: The response time of digital flaw detector should not exceed 5ms
Distance amplitude characteristics: 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: at depth 20mm to distance ΔW ≤ 12dB in the highest point range of the amplitude characteristic curve; ΔW ≤ 8dB in the range from the highest point of the range amplitude characteristic curve to the depth of 150mm; 37° probe: ΔW ≤ 12dB in the range from the depth of 20mm to the highest point of the range amplitude characteristic curve; ΔW ≤ 8dB in the range from the highest point of the amplitude characteristic curve to the depth of 150mm; ΔW ≤ 12dB in the range of 10mm to 70mm corresponding to the detection depth of the 70° probe.
Signal-to-noise ratio: O° probe: The bottom surface is detected on the GTS-60 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 of the 37° inclination angle on the GTS-60 test block, so that the two waves are equal, and the static sensitivity margin when the wave height reaches 80% is greater than or equal to 22dB; the signal-to-noise ratio Not less than 8dB. 70° probe: On the GTS-60 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.
Detecting sensitivity margin: 0° probe: Detecting the 110mm bottom surface of the WGT-3 test block, the sensitivity margin when the wave is as high as 80% is not less than 36dB. 37° probe and 70° probe: Detect the Φ3×65 transverse through hole on the WGT-3 test block. When the wave is as high as 80%, the sensitivity margin is not less than 40dB.
Dynamic flaw detection capability (defect detection capability): With 0°, 37°, 70° rail-specific probes, all artificial defects except the 15° crack on the rail comparison test block GTS-60 can be found and corresponding alarm indications are issued.
Alarm gate adjustment mode: The start position, width and level of the alarm gate can be adjusted manually
Alarm mode: Real-time alarm (incoming wave alarm and loss wave alarm); screw hole double wave alarm; delay two selection one alarm
Alarm indication: Sound and light alarm mode, alarm volume and frequency can be adjusted.
Waveform Measurement: Automatically measures and displays the highest wave path, horizontal and vertical distance within the gate.
Gain curve: The user can adjust the gain curve (8 points) according to actual needs.
Flaw detection record: The whole process data record (maximum 50 km), the data can be exported and played back, and the data format is compatible with GT-2+ model.
Operation input method: touch screen input mode
Display: Resolution 1280×800
Touch screen: Capacitive, high-strength, scratch-resistant, support handwriting
Data interface: USB 2.0; LAN 100Mbps; WIFI 802.11 a/b/g/n; Bluetooth BT 4.0
Instrument power supply: DC 12V (lithium battery pack)
Continuous working time: ≥8h
Water tank capacity: ≥20L
B type image display accuracy: ordinate and abscissa are 2mm
Code wheel accuracy: 2mm
Flaw detection speed: max. 5.0km/h
Working environment temperature: -15 ° C ~ 45 ° C
Dimensions (length × width × height mm): The overall dimensions of the vehicle when it is in operation, its length, width and height are about 780mm × 290mm × 1006mm
Weight: frame about 24kg; ultrasonic instrument about 2.4kg; instrument battery 830g; operation terminal (three anti-tablet computer) 730g; trolley standard 5 sets of probe about 1.4kg
Introduction
The GT-20 rail flaw detector is a railway-specific all-digital, lightweight hand-push rail ultrasonic flaw detection equipment. The equipment fully meets the requirements of the Ministry of Railways TB/T 2340-2012 "rail ultrasonic flaw detector" standard, suitable for the detection of 43kg / m ~ 75kg / m rail, can effectively detect the rail head, rail waist, rail bottom Various defects, suitable for various rail inspection applications such as iron, high-speed rail and subway. The instrument adopts the ultrasonic host + operation terminal mode and connects via wireless WIFI. While improving the customer's operation experience, the instrument's Internet + function can be expanded to realize human-machine detection separation, data online, offline real-time storage, GPS positioning, data cloud storage, etc. Kind of function. And you can customize your own ultrasonic operation terminal according to the customer's own needs.
