KW-4 digital ultrasonic flaw detector is a multi-channel ultrasonic detector using the latest digital integration and artificial intelligence technology. The instrument is easy to operate and has powerful function. The three detection systems of passenger car axle, passenger wheel rim, and freight car axle integrated in the machine can meet the needs of different customers in the railway system.
→ Use touch screen to input information, using high-brightness TFT true-color touch display
→ Eight flaw detection channels can be switched freely, and the corresponding flaw detection process files can be automatically transferred at the same time
→ The instrument has built-in flaw detection process of each shaft type
→ Can preview and print railway system standard report
→ Inspection of passenger car axles, passenger wheel rims, and truck axles, one machine equipped with three systems, without mutual interference
Transmit parameters
| The Form of Pulse | Negative square wave pulse |
| Transmitting Pulse Voltage | 300V- 500V |
| Pulse Leading edge | <10 ns |
| Pulse Width | 30ns-1000ns continuously adjustable (adjustable step 10ns) |
| Impedance Matching | 100Ω 、 500Ω |
Receive Parameters
| Sampling Frequency / Bits | 100MHz/10bits |
| Sampling Depth | 512 |
| Signal Bandwidth | 0.5MHz -15MHz |
| Repeatition Frequency | 30Hz-2KHz |
| Attenuator Accuracy | ＜±1dB/12dB |
| Gain Range | 120dB/0.1dB、1dB、2dB、6dB (Fully automatic adjustment) |
| Scanning Range | Zero interface incidence - 9999mm steel longitudinal wave |
| Sound Speed Velocity Range | (1000 - 9999) m/s |
| Dynamic Range | ≥30dB |
| Vertical Linearity Error | ≤ 3% |
| Horizontal Linearity Error | ≤ 0.1% |
Comprehensive Performance
| Resolution | ≥30dB |
| Surplus sensitivity | ≥60dB(Φ2×200mm） |
| Detection Method | Full detection, positive detection, negative detection, RF |
| Working Method | Single-crystal flaw detection, dual-crystal flaw detection |
Instrument parameters
| Instrument Size | 260x185x75 (mm) |
| Instrument Weight | 2.89kg (including battery) |
| Screen Size | 8.4" |
| Screen Resolution | 800×600 |
| Power Supply, Battery | DC (DC15V/6A)
Battery 11.1V/13600mAh |
| Battery Life | Work continuously for more than 9 hours (powered by lithium battery) |
| Interface | USB2.0, VGA, LAN |
| Ambient Temperature | (-10-40)℃ (Reference value) |
| Relation humidity | (20-95) % RH |
Application
Used in automatic multi-channel detection of wheel hubs and axles of passenger cars and trucks, and automatic multi-channel detection of wheel rims
