The battery-operated platform is controlled with a computer via Bluetooth
The bearer cables and tethers of bridges, elevators, and cable cars are exposed to high levels of stress. For this reason, their functional reliability must be monitored on a regular basis. A new robot recognizes fissures before they pose a danger.
Slowly, very slowly, the robot climbs up the wire cable. As it crawls upward with caterpillar-like movements, it scans the steel surface and detects whether it has any defects. Researchers at the Fraunhofer Institute for Nondestructive Testing IZFP have named the system FluxCrawler. It is designed to monitor the quality of stay cables and wire ropes on a regular basis. Such cables are common features of bridges, elevators, cranes, cable cars, and ski lifts. And these checks are vital, as the tension-induced strain, wear, and corrosion that affect these steel cables mean that they are under enormous stress.
By conducting a magnetic flux leakage test, the robot not only identifies tiny fissures in the cable surface, it also recognizes deeper cracks. This process exposes the cable to a magnetic field that is “disrupted” in the event of a defect. A measurable leakage field is created wherever defects are located. “If such micro-fissures are not discovered in time, the steel can break. This is why material checks are absolutely vital to avoid deadly consequences or even catastrophes”, says Dr. Jochen Kurz, an engineer and department head at IZFP in Saarbrücken.
Test system is suitable for many cable sizes
While the testing of steel cables using magnetic flux leakage is already a common approach, until now coils were used that had to clasp the cable. But this posed a problem: since the diameter of steel cables and their jackets vary considerably, the coils’ limited diameter range meant that they could only be used in a limited number of instances. Moreover, they were unable to locate the exact angle of a defect. In contrast, FluxCrawler can be applied regardless of a cable’s diameter. The robot, which is about seventy centimeters long, scans cylinder-shaped surfaces by revolving around the cable. As a result, there is no need to clasp the cable. A permanent magnet prevents slipping and holds FluxCrawler to the cable. At the same time, it generates the magnetization required to make measurements. Between the two ends of the u-shaped magnet, a line of sensors equipped with several probes is able to rapidly scan the surface. While FluxCrawler moves around the cable, these sensors can identify the exact angle of the defect: they recognize whether defects are on the left, on the right, on the bottom or on top of the cable. The robot can carry out checks on cables with diameters ranging from four to 20 centimeters. The battery-operated platform is controlled with a computer via Bluetooth. An image of the magnetic field on the cable’s entire surface appears on the computer, and each conspicuous spot is illustrated in high resolution on the computer screen.
The Latest Bing News on:
- Feed has no items.
The Latest Google Headlines on:
No news articles
The Latest Bing News on:
Magnetic flux leakage
- View A Transformer's Hysteresis Curve With An Ultra-Simple Circuiton January 14, 2021 at 4:00 pm
A magnetic material’s hysteresis curve is a ... force “H” is a direct function of the exciting current, and the flux density “B” is the integral of the applied voltage.
- Quest Integrated, LLC and Quanta Inline Devices, LLC announce mergeron January 14, 2021 at 1:11 am
LLC (Q-Inline), an emerging technology leader and provider of magnetic flux leakage (MFL) inline inspection services for pipelines, have announced their merger. The combined company will operate under ...
- Intelligent Pigging Market Sales Are Expected to Surpass US$ 1 Billion by 2030, As Stated by insightSLICEon January 12, 2021 at 4:33 pm
The Global Intelligent Pigging Market stood at US$ 600 million in 2019 and is expected to reach US$ 1,050 million by 2030 at a CAGR of 5.2%. Intelligent pigging refers to the inspection of pipes with ...
- Could we harness energy from black holes?on January 12, 2021 at 3:59 pm
"Black holes are commonly surrounded by a hot 'soup' of plasma particles that carry a magnetic field," said Luca ... is possible because black holes leak energy, which is given away for free ...
- Improving Efficiency in Fractional HP Motorson January 12, 2021 at 3:59 pm
Opposite polarized magnets create a very efficient, low-leakage and mostly straight magnetic flux path containing no wasteful back iron. The conical magnet angle allows modification of the air gap and ...
- Intelligent Pigging Market Sales Are Expected to Surpass US$ 1 Billion by 2030, As Stated by insightSLICEon January 12, 2021 at 9:26 am
Based on technology, the global intelligent pigging market is segmented into magnetic flux leakage, ultrasonic, caliper, and others. The magnetic flux leakage based intelligent pigging contributed ...
- Development of fusion energyon December 30, 2020 at 9:10 am
The goal of the project is to predict the leakage of fast "alpha" particles ... the SPARC machine include its compact size and powerful magnetic fields enabled by the ability of new ...
- How Does Pipeline Pigging Work?on August 16, 2020 at 7:47 pm
Inspection pigs utilize two methods to gather information about the interior condition of the pipeline: magnetic flux leakage (MFL) and ultrasonics (UT). MFL inspects the pipeline by sending ...
- Practical Considerations - Transformerson August 16, 2020 at 7:02 am
One way to meet this design criterion is to engineer the transformer with flux leakage paths for magnetic flux to bypass the secondary winding(s). The resulting leakage flux will produce leakage ...
- Intelligent Pigging Market SWOT analysis & Technological Innovation by leading industry Experts- Baker Hughes, Rosen Group, NDT Global, Romstaron March 29, 2018 at 2:07 am
It also covers various types of segmentation such as by geography [United States, EU, Japan, China, India & Southeast Asia], by product /end user type [Magnetic Flux Leakage, Ultrasonic & Caliper ...