Aiming at problem of wet dew point sensors work environment

noise interference and node resourceconstrained and other issues

develop a new type of dew point sensor which has adaptive coupling frequency functions. Firstly

design suitable for dew point sensor mechanical energy and light energy collection device

and establish diversity of energy acquisition program by rectifier filter conversion circuit in series

followed by analyzing effect of optical fiber cutting angle and signal to noise ratio on node energy and work state

establish adaptive coupling frequency conversion mechanism

and finally develop a new type dew point sensor. Experimental results show that designed dew point sensor by proposed program has high precision

stable working conditions and long life cycle and other advantages.