The Consistency Research on the Stress Testing of the Stratum Course in the Coal Mine Tunnel Using the Magnetic Barkhausen Noise
|School||Beijing University of Chemical Technology|
|Course||Control Science and Engineering|
|Keywords||Barkhausen noise Ferromagnetic materials Stress Anchor Non-destructive testing Consistency of multi-sensor data fusion|
Practical applications, the implementation of the ferromagnetic material member for the detection of stress is a very important safety measure . Barkhausen noise stress detection technology developed in the eighties and nineties , a unique non-destructive testing techniques can be achieved relative to other common the lossless stress detection methods , the ferromagnetic material stress Online , transient , portable non-point detection , analysis, evaluation can be made ??of the fatigue life of the material , hardness , microstructure , surface state is a very dynamic development potential non-destructive testing techniques . Barkhausen noise signal generation principle , the characteristics of the noise signal , the paper do deeply detailed analysis , do research and correspondence between Barkhausen noise signal and the stress of ferromagnetic materials , and do calibration tests eventually produced a Barkhausen noise stress detection system . The system includes a sensor, the analog signal processing circuit , the digital signal processing circuit , and a power supply circuit . Done a detailed analysis of the various parts of the production process as well as the principle basis . Of Anchor tunnel support , coal mine roadway support , slope and foundation pit support and dam foundation engineering , which has been a wide range of applications . The bolt is a tension spread to the stability of the rock and soil reinforcement unstable parts of the rock and soil anchoring system . Magnetic Barkhausen noise method to detect the ferromagnetic component stress promotion to anchor stress detection , and the reality of the coal mine tunnel rock layers do to force use of the consistency of multi-sensor data fusion technology , the use of the method be able to get the a roadway rock formations overall force , provides a strong basis to determine whether there is a roof fall may be dangerous .