Powering for Long Term Monitoring in the Enclosed Areas

Authors

Paper presents possible solution and practical

examples for wireless powering and signal transfer using the

inductive coupling. It can be suitable for long term monitoring

in enclosed areas and systems that are isolated form the

surroundings. This solution allows avoiding the batteries. It can

be used for probes bricked in to the wall, extreme temperature

environment measurement, the barrels internal shells health

monitoring etc. Main advantage of this kind of powering is

nearly unlimited lifetime, no toxic pollutions (such as Cd, Li,

H2SO4,… contained in the batteries) and universal applicability.

The powering is provided by the near magnetic field. The

resonance is considered in the design for increasing the voltage

transfer. Also the passive signal transfer can be performed using

this principle while it is similar to the RFID systems (Radio

Frequency Identification). The main contribution of this paper

is prediction of the powering potentialities and distance limits

of this strategy. Voltage levels, power transfer efficiency and

signal modulation effects are studied up to distance of 30 cm.

The simple coils are considered. Also special converter

principle is presented for this purpose.