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- 2018
基于FPGA的数字化电涡流位移传感器设计
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Abstract:
电涡流位移传感器的载波信号和解调信号均为模拟处理信号，其测量和解调电路均会提高硬件电路复杂性和信号的不稳定性，并增大磁轴承系统的总体设计体积和功耗等。针对这一问题，该文设计了以调幅式电涡流位移传感器为基础的数字化电涡流位移传感器。利用现场可编程门阵列（FPGA）的数字输出信号设计传感器的载波信号，通过FPGA的软件设计对测量电路的输出信号进行数字化处理。该设计在有效降低电路设计复杂性和功耗的同时，提高了传感器测量的可靠性和精确性。
Abstract：The carrier and demodulated signals of eddy current displacement sensors are both analog signals. Thus, the measurement and demodulation circuitries are complex, unstable and increase the volume and power consumption of the magnetic bearing system. This paper describes an improved digital eddy current displacement sensor based on amplitude modulation with the digital carrier signal given by a field programmable gate array (FPGA) to demodulate the digital output signal of the sensor. The measurement reliability and accuracy are improved while the complexity and power consumption are reduced in this integrated digital eddy current displacement sensor.
| [1] | DEVER T P, PALAZZOLO A B, THOMAS Ⅲ E M, et al. Evaluation and improvement of eddy current position sensors in magnetically suspended flywheel systems[R]. Hanover, MD:NASA, 2001. |
| [2] | 杨剑, 刘光斌. 单片机系统中应用的几种数字滤波方式[J]. 微计算机应用, 2006, 27(1):114-116. YANG J, LIU G B. Several ways of digital filtering application in MCU system[J]. Microcomputer Applications, 2006, 27(1):114-116. (in Chinese) |
| [3] | LI L C. Eddy-current displacement sensing using switching drive where baseband sensor output is readily available[J]. IEEE Transactions on Instrumentation and Measurement, 2008, 57(11):2548-2553. |
| [4] | RODRIGUEZ S, WANG Y X, AKID R, et al. Design of an FPGA-based eddy current instrument for the detection of corrosion pits[C]//Proceedings of 2015 IEEE International Instrumentation and Measurement Technology Conference. Pisa, Italy:IEEE, 2015:705-710. |
| [5] | 董永贵, 孟凡, 张琦. 电涡流传感器的脉冲激励与双参数检测[J]. 仪表技术与传感器, 2009(S1):221-224. DONG Y G, MENG F, ZHANG Q. Pulsed excitation and dual-parameter measurement method for eddy current sensor[J]. Instrument Technique and Sensor, 2009(S1):221-224. (in Chinese) |
| [6] | PASSENBRUNNER J, SILBER S, AMRHEIN W. Investigation of a digital eddy current sensor[C]//Proceedings of 2015 IEEE International Electric Machines & Drives Conference. Coeur d'Alene, USA:IEEE, 2016:728-734. |
| [7] | FEKRI A, NABAVI M, RADELJIC'-JAKIC' N, et al. An eddy-current displacement-to-digital converter based on a ratio-metric delta-sigma ADC[C]//Proceedings of the 40th European Solid State Circuits Conference. Venice Lido, Italy:IEEE, 2014:403-406. |
| [8] | 庞喜浪, 刘刚, 文通. 用于磁轴承位移检测的数字式电涡流位移传感器设计与实验研究[J]. 传感技术学报, 2011, 24(3):360-364. PANG X L, LIU G, WEN T. Design and experiment study of digital eddy current displacement sensor used for displacement detection of magnetic bearing[J]. Chinese Journal of Sensors and Actuators, 2011, 24(3):360-364. (in Chinese) |
| [9] | 李移. 数字式电涡流位移传感器的研制[D]. 西安:西安科技大学, 2013. LI Y. The development of the digital eddy current displacement sensor[D]. Xi'an, China:Xi'an University of Science and Technology, 2013. (in Chinese) |
| [10] | 王海英, 李文龙, 崔玥, 等. 基于电涡流传感器的智能高度控制系统设计[J]. 控制工程, 2008, 15(1):43-45, 49. WANG H Y, LI W L, CUI Y, et al. Design of intelligent height control system based on eddy current sensor[J]. Control Engineering of China, 2008, 15(1):43-45, 49. (in Chinese) |
| [11] | 邓志鹏, 陈向东. 石英晶体振荡器的微处理器温度补偿技术研究[J]. 单片机与嵌入式系统应用, 2012, 12(8):4-7. DENG Z P, CHEN X D. Research of microprocessor temperature compensation technique for quartz crystal oscillator[J]. Microcontrollers & Embedded Systems, 2012, 12(8):4-7. (in Chinese) |
| [12] | 黄庆彩, 祖静, 裴东兴. 基于MAX038的函数信号发生器的设计[J]. 仪器仪表学报, 2004, 25(S1):321-322. HUANG Q C, ZU J, PEI D X. Signal generator design with integrated circuit MAX038[J]. Chinese Journal of Scientific Instrument, 2004, 25(S1):321-322. (in Chinese) |
