120吨双轴伺服压机载荷前置放大器设计与应用
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摘要
针对岩石变形研究所使用的双轴伺服压机的环境电磁干扰大的特点,所设计的低噪声载荷前置放大器配备了开关电源滤波电路;放大器具有系统零点补偿电路,可有效补偿双轴伺服压机系统由于环境温度变化、压机系统零漂等因素所带来的检测压力的零点不稳定现象。新设计的载荷前置放大器可稳定且线性地放大载荷传感器输出的微弱信号;其应用于120吨双轴伺服压机的伺服控制中时,可实时地跟踪伺服控制压力,稳定地实现120吨双轴伺服压机的载荷闭环检测与控制。
According to the characteristics of large environmental electromagnetic interference of biaxial servo press used in study of rock deformation, the designed super low noise preamplifier is equipped with the switching power filter circuit. The amplifier has zero compensation circuit of system, which can effectively compensate the instability of zero point of pressure caused by the change of environment temperature and zero drift of the press system. The newly designed load preamplifier can stably and linearly amplify the weak signals output from the load sensor; while the preamplifier can track the servo control pressure real-timely, and closed loop detection and control of load in 120 ton biaxial servo press can be realized stably, when the preamplifier is applied to the servo control of 120 ton biaxial servo press.
According to the characteristics of large environmental electromagnetic interference of biaxial servo press used in study of rock deformation, the designed super low noise preamplifier is equipped with the switching power filter circuit. The amplifier has zero compensation circuit of system, which can effectively compensate the instability of zero point of pressure caused by the change of environment temperature and zero drift of the press system. The newly designed load preamplifier can stably and linearly amplify the weak signals output from the load sensor; while the preamplifier can track the servo control pressure real-timely, and closed loop detection and control of load in 120 ton biaxial servo press can be realized stably, when the preamplifier is applied to the servo control of 120 ton biaxial servo press.
引文
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[2]马瑾,S I SHERMAN,郭彦双.地震前亚失稳应力状态的识别——以5°拐折断层变形温度场演化的实验为例[J].中国科学:地球科学,2012,42(5):633-645.
[3]郭玲莉,刘力强.区域加载过程与发震断层变形演化的实验研究[J].地震地质,2014,36(1):243-252.
[4]李普春,刘力强,郭玲莉,等.粘滑过程中的多点错动[J].国际地震动态,2013,35(1):125-137.
[5]陈宝伟,王学影,姚进辉,等.应变式负荷传感器温度补偿研究[J].计算机测量与控制,2016,24(1):331-333.
[6]陈广华,鞠娜,杨飞,等.基于粘贴式应变传感器的车辆超载监测系统[J].北京航空航天大学学报,2011,37(4):409-414.
[7]朱超,宋莉莉,孙万麟.基于AT89S52直流稳压电源的电路设计[J].电子设计工程,2016,24(12).
[8]周园,谭功全.数字式可调直流稳压电源设计[J].电子设计工程,2013,21(21):120-122.
[9]李万峰.电源滤波技术[J].电子科技,2012,25(7):83-85.
[10]王军,周国平.高速控制系统运放电路稳定性研究[J].制造业自动化,2012,34(21):91-93.
[11]李兆斐,刘平,张克军.开关电源IC中误差放大器的自激振荡及解决方法[J].电子设计工程,2011,19(8):167-169.
[12]王赞,陈伯孝.基于压缩感知的高频地波雷达射频干扰抑制[J].系统工程与电子技术,2012,34(8):1565-1570.
[13]孙科学,卜新华,唐珂.程控增益低噪声宽带直流放大器的设计[J].现代电子技术,2012,35(3):188-190.
[14]何晓丰,莫太山,王晴晖,等.高精度宽带数字控制可变增益放大器的设计[J].微电子学,2012,42(4):458-462.
[15]史骏,彭静玉.基于双T网络的50Hz陷波电路设计[J].科技信息,2011(21):121-122.