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Direct current field
| Глоссарий по неразрушающему контролю в авиации |
Active magnetic field produced by direct current flowing in a conductor or coil.
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Direct viewing, английский
- (1) viewing of a test object in the viewer’s immediate presence. the term direct viewing is used in the fields of robotics and surveillance to distinguish conventional from remote viewing. (2) viewing of a test object during which the light image is not mediated through a system of two or more lenses (as in a borescope) or transduced through an electronic signal (as with a charge coupled camera). the term direct viewing is used in some specifications to mean viewing possibly with a mirror or magnifier but not with a borescope. compare indirect viewing; remote viewing.
- Viewing of a test object in the viewer’s immediate presence. the term direct viewing is used in the fields of robotics and surveillance to distinguish conventional from remote viewing.
- Viewing of a test object during which the light image is not mediated through a system of two or more lenses (as in a borescope) or transduced through an electronic signal (as with a charge coupled camera). the term direct viewing is used in some specifications to mean viewing possibly with a mirror or magnifier but not with a borescope. compare indirect viewing; remote viewing.
- Viewing of a test object in the viewer’s immediate presence. the term direct viewing is used in the fields of robotics and surveillance to distinguish conventional from remote viewing.1
Differential coils, английский
- Two or more physically adjacent and mutually coupled coils connected in series opposition such that an imbalance between them, causing a signal, will be produced only when the electromagnetic conditions are different in the regions beneath the coils. in contrast, comparator coils are not adjacent or mutually coupled. compare comparator coils. 19.8 aerospace nondestructive testing
- Две или более физически соседние и взаимно связанные катушки, соединенные последовательно друг против друга так, что дисбаланс между ними, вызывающий сигнал, будет возникать только тогда, когда электромагнитные условия различны в областях под катушками. напротив, катушки компаратора не расположены рядом и не связаны друг с другом. сравните катушки компаратора. 19.8 авиационный неразрушающий контроль
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