Design of Frequency Selection Circuit of Advanced Detector Receiving Device in Coal Mine Roadway

Abstract:

Coal mine roadway advanced detector, including the transmitting and receiving devices, is a kind of geophysical instrument used in coal mine roadway advanced detection based on the dynamic and directional electric field excitation method. The transmitting device emits dual frequency modulated square wave current into the excavation face and the receiving device receives potential difference of coal and rock medium generated by induced polarization, of which the frequency selection circuit is to filter the interference of the harmonics of the signal and other frequency components. The paper derived expressions of emission current. Considering the actual working conditions, the paper proposed the design requirements of the frequency selection circuit and the scheme of a controller to control multiple frequency selection filter circuits. The paper completed the design of the control circuit consisting of a microcontroller and analog switch MAX313 and the band-pass filter circuit consisting of universal active filter UAF42. According to the circuit simulation and the analysis of the data with software of multisim, it proves the design of circuit meets the requirements.

• Periodical: Applied Mechanics and Materials (Volume 740)
• Pages: 507-510
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.740.507
• Online since: March 2015
• Authors: Xi Gao Liu*, Zhi Min Liu, Jin Tao Zhang, Yi Ming Lv, You Zhou, Liang Wu, Miao Wu
• Keywords: Advanced Detection, Analysis, Frequency Selection Circuit, Receiving Device, Simulation

References

[1] W.J. Zhang, M.R. Hao and Y.B. Du: Discussion on new pilot detection of mine roadway baseddual frequency induced method, Coal Science and Technology, Vol. 38-3(2010), pp.73-75.

[2] J.S. He: Dual frequency induced polarization method (Higher Education Press, Beijing, China 2006).

[3] Johnnie Molina, R. Mark Stitt: Filter Design Program for the UAF42 Universal Active Filter, Application Bulletin, Texas Instruments Incorporated.

[4] Y. Deng, Q. Liu, W.K. Shi: Filter42-The Computer-Aided-Design Software of Universal Active Filter UAF42, International Electronic Elements, Vol. 7-10(2001), pp.44-46.

[5] X.H. Xu, C.H. He: Multisim 10 Computer Simulation and Application (Tsinghua University Press & Beijing Jiaotong University pressHigher Education Press, Beijing, China 2011).