Slurry signal identification method based on reliability analysis

The invention discloses a novel slurry pulse signal identification method based on reliability analysis. The novel slurry pulse signal identification method is characterized in that the novel slurry pulse signal identification method comprises the following steps that S1, measurement-while-drilling information is transmitted to the ground in the mode of slurry pulse signals, the pulse signals arecollected as input through a vertical pipe pressure sensor; S2, input signals are preprocessed, and according to the basic characteristics of the rising edges and falling edges of the signals, a timeperiod in a pulse width unit and initial to-be-detected signals in the time period are determined; S3, a characteristic standard is established to preliminarily measure whether the to-be-detected signals output in the step S2 is true signals or not; S4, the similarities of the signals screened in the step S3 and standard slurry pulse signals are calculated by using two sets of different weights; and S5, the signal similari