摘要:
The transducer (10) includes a casing (12) which defines an essentially L-shaped cavity having a substantially horizontal lower arm (16) and a substantially vertical ascending arm (18); a volume of mercury (A) which, in the rest condition, occupies the lower arm (16) and essentially does not occupy the ascending arm (18); an input electrode (30) which penetrates the lower arm (16) from the outside and is permanently immersed in the mercury (A), and a series of separate output electrodes (28₁ ... 28₇) which are spaced along the ascending arm (18) and can be reached in succession by the mercury (A) when it rises in the ascending arm (18) due to an inertial force directed along the lower arm (16) towards the ascending arm (18). The indicator (50) includes an elongate hollow body (52) provided with means (58) for fixing to the bodywork of a motor vehicle and carrying an array of electrical light units (92 1S ...92 6S , 92 1D ...92 6D ) spaced along its length. These units are aligned transverse the vehicle and face rearwardly with respect to the direction of travel. An inertial transducer such as that defined above is mounted in the hollow body (52) and its output electrodes are each connected to at least one of the light units.
摘要:
Systems and methods using fluid-filled hollow microspheres to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres may be adhered to or embedded in a coating applied on a surface of a substrate (e.g., a tape or an appliqué), which substrate in turn can be adhered to a surface of a structure to be monitored. The microspheres are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres are filled with electrically conductive fluid which, if released from ruptured microsphere, changes the electromagnetic state of the substrate. In response to the detection of a sufficiently large change in the electromagnetic state of the substrate, a blunt impact indication is generated. The impact site may then undergo nondestructive inspection.
摘要:
Systems and methods using fluid-filled hollow microspheres to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres may be adhered to or embedded in a coating applied on a surface of a substrate (e.g., a tape or an appliqué), which substrate in turn can be adhered to a surface of a structure to be monitored. The microspheres are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres are filled with electrically conductive fluid which, if released from ruptured microsphere, changes the electromagnetic state of the substrate. In response to the detection of a sufficiently large change in the electromagnetic state of the substrate, a blunt impact indication is generated. The impact site may then undergo nondestructive inspection.
摘要:
A resettable impact switch is disclosed having a housing (12), a first terminal (22) and a second terminal (26) secured to the housing, and a moveable conductor (44) maintained in contact at one end with a reservoir of mercury and at the opposite end with the second terminal (26). The reservoir of mercury is, in turn, in contact with said first terminal (22), allowing the conduction of current through the switch when the moveable conductor (44) is connected to said second terminal (26) and said reservoir of mercury, as during normal operation thereof. Upon a predetermined level of impact imparted to said switch or upon inversion thereof, the connection between the conductor (44) and mercury is broken, thereby opening the switch. The switch is maintained open until a resetting operation is performed. The connection between the opposite end of the conductor can also be broken to de-activate the switch.
摘要:
Systems and methods using fluid-filled hollow microspheres to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres may be adhered to or embedded in a coating applied on a surface of a substrate (e.g., a tape or an appliqué), which substrate in turn can be adhered to a surface of a structure to be monitored. The microspheres are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres are filled with electrically conductive fluid which, if released from ruptured microsphere, changes the electromagnetic state of the substrate. In response to the detection of a sufficiently large change in the electromagnetic state of the substrate, a blunt impact indication is generated. The impact site may then undergo nondestructive inspection.
摘要:
Systems and methods using fluid-filled hollow microspheres to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres may be adhered to or embedded in a coating applied on a surface of a substrate (e.g., a tape or an appliqué), which substrate in turn can be adhered to a surface of a structure to be monitored. The microspheres are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres are filled with electrically conductive fluid which, if released from ruptured microsphere, changes the electromagnetic state of the substrate. In response to the detection of a sufficiently large change in the electromagnetic state of the substrate, a blunt impact indication is generated. The impact site may then undergo nondestructive inspection.
摘要:
The transducer (10) includes a casing (12) which defines an essentially L-shaped cavity having a substantially horizontal lower arm (16) and a substantially vertical ascending arm (18); a volume of mercury (A) which, in the rest condition, occupies the lower arm (16) and essentially does not occupy the ascending arm (18); an input electrode (30) which penetrates the lower arm (16) from the outside and is permanently immersed in the mercury (A), and a series of separate output electrodes (28₁ ... 28₇) which are spaced along the ascending arm (18) and can be reached in succession by the mercury (A) when it rises in the ascending arm (18) due to an inertial force directed along the lower arm (16) towards the ascending arm (18). The indicator (50) includes an elongate hollow body (52) provided with means (58) for fixing to the bodywork of a motor vehicle and carrying an array of electrical light units (92 1S ...92 6S , 92 1D ...92 6D ) spaced along its length. These units are aligned transverse the vehicle and face rearwardly with respect to the direction of travel. An inertial transducer such as that defined above is mounted in the hollow body (52) and its output electrodes are each connected to at least one of the light units.
摘要:
Systems and methods using fluid-filled hollow microspheres to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres may be adhered to or embedded in a coating applied on a surface of a substrate (e.g., a tape or an appliqué), which substrate in turn can be adhered to a surface of a structure to be monitored. The microspheres are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres are filled with electrically conductive fluid which, if released from ruptured microsphere, changes the electromagnetic state of the substrate. In response to the detection of a sufficiently large change in the electromagnetic state of the substrate, a blunt impact indication is generated. The impact site may then undergo nondestructive inspection.