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Automatic warning system (aws)
| Глоссарий в железнодорожной технике |
British system for alerting the driver to a signal aspect which requires action (horn for danger) or indicating a clear signal ahead (bell for green). based on a track-mounted permanent magnet with an electromagnet to cancel the warning.uos
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Electromagnet, английский
- Электромагнит
- A soft iron core surrounded by a coil of wire. the iron core becomes magnetic when an electric current flows through the wire.
- Ferromagnetic core surrounded by a coil of wire that temporarily becomes a magnet when an electric current flows through the wire. electromagnetic acoustic transducer (emat): transmitting transducer based on the force exerted on a current flowing in a magnetic field. a receiving transducer that detects the current produced by moving a conductor in a magnetic field. glossary 19.9 electromagnetic testing (et): nondestructive test method for materials, including magnetic materials, that uses electromagnetic currents, either alternating or direct current, to yield information about the test object. in nondestructive testing, the term electromagnetic testing is not applied to methods such as radiologic and thermographic testing, in which the interrogating energy is a form of electromagnetic radiation. electronvolt (ev): kinetic energy acquired by an electron in passing through a potential difference of 1 v in vacuum; 1 ev = ~1.60 j. the electronvolt is commonly used to express the energy of x-rays. emat: see electromagnetic acoustic transducer.
- Ferromagnetic core surrounded by a coil of wire that temporarily becomes a magnet when an electric current flows through the wire.4
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Side chains, английский
Chains provided at vehicle ends on some railways for emergency coupling purposes in case the standard coupling breaks.
H frame bogie, английский
Bogie design where headstocks are omitted and the bolster is fixed. usually of welded, box frame construction.
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