Application of information processing technology on non-destructive detecting of rock bolts

The parameters such as the length of rock bolts, anchorage length, free length or construction defects (e.g., the position of less density in anchorage body) are important to evaluate the quality of rock bolts. Because of the harsh environment, the measured signal includes many kinds of noise, which have a great effect to the signal. It is difficult to detect the signal effectively by traditional information processing technology, and therefore the new information processing technology based on non-destructive detecting is provided. The steps are as follows: first, excite rock bolts using pseudo-random signal, then acquire the reflection signal and transmit to a computer, and remove the reflection signal noise using the Hilbert-Huang transform method and extract the characteristic value, finally, calculate the parameters of rock bolts using cross-correlation method and complete detection of rock bolts. Experimental results show that the effect of the above detection method is better than traditional corre...