When a conductor moves in an electromagnetic field, an electric current appears in the conductor itself. A cable core under the influence of vibrations acts as an antenna, and a parasitic current is induced in it, which interferes with the reception of a useful signal.
Anti-vibration wires and cables are used to reduce the effects of vibrations at the connections of piezoelectric transducers with measuring devices.
The construction of anti-vibration cable consists of five layers symmetrically located inside each other:
- Central vein. The main element is conductive, it can be single-core or multi-core, most often made of copper or aluminum.
- Insulation. Insulates the conductive core from external influences, the insulation material affects the heat resistance, it is made of polyethylene, fluoroplastic or polyvinyl chloride.
- Semi-conductive screen. Serves to distribute the electric field inside the cable, made of semiconducting materials.
- External screen. Protects the central core from interference, depending on the purpose and operating conditions, it can be aluminum and copper foil, or braid.
- Protective shell. Provides mechanical strength and non-combustibility of the structure, most often it is made of high pressure polyethylene.
Materials for each layer are selected specifically for the necessary conditions
Cables AVK, AVKT, AVKTDL can withstand temperatures from -50 to +70 degrees, are resistant to solar radiation, mold. Stoics to dust, single and repeated mechanical loads and acoustic noise. The noise voltage when exposed to vibration at frequencies of 40, 60, 500 Hz and an acceleration of 100 m /s² for such cables averages 40 micro Volts.
