The MFE Enterprises HSR Crawler is a high-speed raster ultrasonic scanner designed for large vessel inspections.
The HSR Crawler provides high performance and durability, capable of corrosion scanning on pipes as small as 2 inches in diameter without requiring probe adjustments.
This crawler features high maneuverability, robust environment sealing, and custom-engineered gearing with direct-coupled four-wheel drive, making it ideal for rugged inspection environments.
Equipment Type: Ultrasonic Thickness Scanner
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The MFE HSR (High-Speed Raster) Crawler is an innovative ultrasonic scanner that addresses the need for an automated raster type unit offering higher performance and durability over an extended range of applications.
The scanner traverses large vessels with obstacles that are problematic for most tank crawlers, yet performs corrosion scanning on pipe down to 2″ nominal diameter while requiring no probe adjustments over the range.
The scanner offers high maneuverability via steering with the controller’s touch-screen interface or optional extended joystick. A spring-detent suspension allows all for our the large diameter magnetic wheels to maintain contact on uneven surfaces. Locking the suspension provides optimal alignment on pipe. A parking function lifts the advanced transducer/coupling shoe assembly for crossing over larger obstacles.
High scanning speed is achieved without sacrificing high torque and actuator force, and the specially engineered gears are coupled directly to all four wheels through a compact, sealed enclosure for durability and low maintenance.
The high quality servo motors are powered with specially designed low EMI motor drives in a closed-loop configuration, offering high positional accuracy. Scanning operation may be controlled using simple step and directional signals.
A home positioning routine is utilized with solid sate end sensors for collision control. Conventional or phased array type transducers can be deployed, and the scanner is offered in extended stroke lengths.
Technical Specifications
| Drive Axis – Speed | 11 in/sec (28cm/sec) |
| Drive Axis – Torque (per drive second) | 74 in/lb (8.36 Nm) [x2 for dual drive] |
| Drive Axis – Encoder Resolution (full cycles) | 3081.767 cycles/in (1212.23232 cycles/mm) [1 cycle typ. = 4 pulses] |
| Scan Axis – Speed | 25 in/sec (63.5 cm/sec) |
| Scan Axis – Actuator force | 20 lbf (89N) |
| Scan Axis – Encoder Resolution (full cycles) | 1381.648 cycles/in (54.4 cycles/mm) |
| Scan Arm Lengths | 12 in, 24 in (36 in proposed) (30.5, 61cm) |
| Over-Travel | Approximately 1 in per side (25 mm per side) |
| Scan Limit Protection | Magnetic limit switches |
| Magnetic Pull Force | 45 lbf per wheel (202 N) [x4] |
| Maneuverability | Highly maneuverable with joystick or touch screen steering controls |
| No Probe Adjustments | No adjustments needed when changing pipe diameter |
| Homing & Limit Sensors | Equipped with homing and limit sensors for precise control |
| Remote Probe Lifting | Includes a remote probe lifting mechanism |
| Circumferential Scan | Capable of circumferential scans and axial indexing for phased array piping applications |
| Extended Capabilities | Covers storage tanks and piping as small as 2 inches in diameter |
| High Speed & High Torque | Designed for fast and powerful operation |
| Rugged Environment | Engineered for tough conditions with robust environmental sealing |
| Suspension Configuration | Spring-centered suspension ensures 4-wheel contact on uneven surfaces |
| Custom Engineered Gearing | Direct coupled four-wheel drive with custom gearing |
| Extended Stroke Lengths | Offers extended stroke lengths for enhanced performance |
| Magnetic Wheels | High-strength rare earth magnetic wheels with optimized traction compounds |
| Low EMI Noise | Low electromagnetic interference motor drives |
| Touch Screen Controller | Easy-to-use touch screen controller for simplified operation |
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