摘要:
There are provided a shielded cable comprising a core wire for carrying an electrical signal, and a shield provided around the circumference of the core wire and connected to the core wire via a drive circuit, wherein the drive circuit has a band limiting circuit which decreases an output voltage in a predetermined frequency band; and an apparatus which acquires a bioelectrical impedance value or biological composition data by using the shield cable.
摘要:
A cable (30) includes an inner conductor (50), an inner dielectric (52), and a guard conductor (56), where the inner dielectric (52) is between the inner conductor (50) and the guard conductor (56). The cable also includes an outer dielectric (58), and a shield conductor (62), where the outer dielectric (58) is between the guard conductor (56) and the shield conductor (62). The cable further includes an additional layer of material between the outer dielectric and the shield conductor (30) of suitable composition for reducing triboelectric current generation between the outer dielectric (58) and the shield conductor (62) to less than that which would occur were the outer dielectric and the shield conductor to directly adjoin each other.
摘要:
There are provided a shielded cable comprising a core wire for carrying an electrical signal, and a shield provided around the circumference of the core wire and connected to the core wire via a drive circuit, wherein the drive circuit has a band limiting circuit which decreases an output voltage in a predetermined frequency band; and an apparatus which acquires a bioelectrical impedance value or biological composition data by using the shield cable.
摘要:
Capacitance transducer apparatus, for example for measuring blade tip clearance in a jet engine of gas turbine, comprises an oscillator (14) connected by a cable (6) to a capacitance means such as a probe (4). The cable is tri-axial comprising an inner conductor (22), an outer protective layer (24) and an intermediate layer (26) between the outer layer and inner conductor, the inner conductor, intermediate layer and outer layer all being electrical conductors. The intermediate layer (26) consists of a material that is different to that forming the outer layer and is of relatively high electrical conductivity. The resistance of the intermediate layer is preferably less than 1 Ohm metre-1, and especially les than 0.1 Ohm metre-1, which may be achieved by forming the intermediate layer from a nickel based material, and especially from pure nickel. The reduction in the intermediate layer resistance can lead to higher sensivity of the apparatus by enabling any guard driver amplifier (165) in the apparatus to drive the capacitance over the full length of the cable.
摘要:
A shielded electric cable (10) having a core including an insulated conductor (11). A first shielding member (13) formed of an elongated ribbon of insulating material (13a) a pair of elongated metal foil strips (13b) and (13c) arranged in a parallel relationship with the ribbon (13a) and bonded to the opposite side of the ribbon is applied longitudinally to the core and wrapped circumferentially there around forming two concentric substantially closed shielded layers. A layer of plastic material (14), preferably foamed, surrounds the first shielding member and a second shielding member (15) surrounds the plastic layer, the second shielding member being formed of non-braided metallic material. The layer of plastic material is bonded to the shielding members. The shielded electric cable is provided with an outer jacket (16) of non-conducting material and having an appropriate O.D. for receiving a standard connector.
摘要:
Le câble mixte électrique et optique a une structure triaxiale comportant le long d'un même axe central, trois conducteurs électriques tubulaires, concentriques, imbriqués et une fibre optique centrale. Application à la télévision haute définition.