Cable Microphonic CLF200 RG58

Parasitic electrical signals are generated during the movement of cables as a result of mechanoelectric effects. For use as test leads, cables require low microphonic effects and for use as sensors, cables should have predictable microphonic effect. Related standards describe cable load with small longitudinal amplitudes or abrupt loads. In this work, the investigation shows the behavior of coaxial cables (namely, RG58 and CLF200) at different maximum bending angles (10°, 20°, 40°) and angular velocities (10 RPM, 20 RPM, 40 RPM) of bending. As signal parameters, the RMS value of the generated charge as well as the cross-correlation coefficient of the mechanical input and the electrical output and the energy of the electrical signal that cannot be described by a linear system (residuals) divided by the total energy were investigated. Results show, that the RMS value of the generated charge is shown to be dependent on the bending angle (10° to 40°). By comparison, a change in angular velocity shows no substantial change in RMS value. No significant influence of the studied parameters on the cross-correlation coefficient could be found. In addition, changes in bending angle increased the energy of the residuals, while changes in angular velocity decreased the energy of the residuals. In general, coaxial structures are suitable for use as sensors. However, due to the high variability of the electrical signal, it is necessary to determine the transfer function for each cable individually. The use of less complex structures offers a promising approach for the following investigations.