立木电阻断层成像检测激励源的改进设计
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摘要
为提升活立木内部早期腐朽检测电阻断层成像数据采集系统的性能,为电阻断层成像数据采集系统设计一种稳定性更好、带负载能力更高的激励源电路。与之前的激励源电路相比,该激励源电路主要是通过差分放大子电路以及恒流源子电路的改进设计实现的整体激励源电路性能提升。并通过电路仿真软件Multisim的仿真以及实际电路测试的方法,对该激励源电路的信号频率稳定性、负载稳定性以及温度稳定性等主要性能参数进行分析。仿真结果与实际电路测试结果表明:改进设计的激励源电路比原设计的激励源电路性能在信号频率稳定性、负载稳定性上均得到很大的提升,但在电路实际工作时的温度稳定性区别却不是很大。从整体上来说,还是实现了提高电阻断层成像数据采集系统性能的最终目的。
In order to improve the property of resistive tomography data acquisition system for early decay in standing trees, this paper designs a better stability and higher load excitation source curcuit for resistive tomography data acquisition system. Compared with the previous circuit design, the improvement of the property of this circuit is mainly achieved by improving the design of the differential amplification sub-circuit and the constant-current source sub-circuit. In addition, the main property parameters such as signal frequency stability, load stability and temperature stability of the excitation source circuit are analyzed through the simulation of circuit simulation software Multisim and the actual circuit test. The simulation results and the actual circuit test results show that the improved design of the excitation source circuit has greatly improved the signal frequency stability and load stability compared with the original design of the circuit, but the temperature difference in the actual work of the circuit stability is not great. But, as a whole, it basically achieves the purpose of improving the performance of the resistance tomography data acquisition system.
In order to improve the property of resistive tomography data acquisition system for early decay in standing trees, this paper designs a better stability and higher load excitation source curcuit for resistive tomography data acquisition system. Compared with the previous circuit design, the improvement of the property of this circuit is mainly achieved by improving the design of the differential amplification sub-circuit and the constant-current source sub-circuit. In addition, the main property parameters such as signal frequency stability, load stability and temperature stability of the excitation source circuit are analyzed through the simulation of circuit simulation software Multisim and the actual circuit test. The simulation results and the actual circuit test results show that the improved design of the excitation source circuit has greatly improved the signal frequency stability and load stability compared with the original design of the circuit, but the temperature difference in the actual work of the circuit stability is not great. But, as a whole, it basically achieves the purpose of improving the performance of the resistance tomography data acquisition system.
引文
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[12]王兴龙,王立海.白桦模拟缺陷材的电阻层析成像规律探究[J].林业工程学报,2016,1(2):106-111.Wang X L,Wang L H.Research on electrical resistance tomography of birch logs with artificial simulating defects[J].Journal of Northeast Forestry,2016,1(2):106-111.
[13]Cho J G,Rim G H,Lee F C.Zero voltage and zero current switching full bridge PWM converter using secondary active clamp[C].Power Electronics Specialists Conference,1996.Pesc'96 Record.IEEE.IEEE,1996,1:657-663.
[14]Peterchev A V,Sanders S R.Quantization resolution and limit cycling in digitally controlled PWM converters[J].IEEE Transactions on Power Electronics,2001,18(1):301-308.
[15]孙学东,陶新民,曲艺卓,等.基于电阻断层成像技术的立木探伤检测系统[J].应用科技,2017,44(4):40-48.Sun X D,Tao X M,Qu Y Z,et al.Tree flaw detection system based on electrical resistivity tomography[J].Applied Science and Technology,2017,44(4):40-48.
[16]涂戈.电阻抗成像系统设计[D].成都:电子科技大学,2015.Tu G.The design of electrical impedance imaging system[D].Chengdu:University of Electronic Science and Technology of China,2015.
[17]郭康.三维电阻层析成像(ERT)硬件系统设计[D].沈阳:东北大学,2014.Guo K.Design for three-dimensional electrical resistance tomography(ERT)hardware system[D].Shenyang:Northeastern University,2014.
[18]李有余.电阻抗断层成像硬件系统的研究[D].天津:河北工业大学,2003.Li Y Y.Research on hardware system of electrical impedance tomography[D].Tianjin:Hebei University of Technology,2003.
[2]岳小泉,王立海,王兴龙,等.电阻断层成像、应力波及阻抗仪3种无损检测方法对活立木腐朽程度的定量检测[J].林业科学,2017,53(3):138-146.Yue X Q,Wang L H,Wang X L,et al.Quantitative detection of internal decay degree for standing trees based on three NDT methods-electric resistance tomography,stress wave imaging and resistograph techniques[J].Scientia Silvae Sinicae,2017,53(3):138-146.
[3]杨慧敏,王立海.立木与原木内部腐朽二维成像检测技术研究进展[J].林业科学,2010,46(7):170-175.Yang H M,Wang L H.Research and development on 2D imaging technology of the decay in trees and logs[J].Scientia Silvae Sinicae,2010,46(7):170-175.
[4]Gilbert A E,Smiley E T.Picus Sonic Tomography for the quantification of decay in white oak(Quercus alba)and Hickory(Carya spp.)[J].Journal of Arboriculture,2004,30(5):277-280.
[5]徐庆波,王立海,王兴龙,等.传感器不均匀分布对电阻层析成像检测原木内缺陷的影响[J].东北林业大学学报,2016,44(10):73-78.Xu Q B,Wang L H,Wang X L,et al.Effects of uneven distribution on the sensor within the ERT defect detection logs[J].Journal of Northeast Forestry University,2016,44(10):73-78.
[6]鲍震宇,王立海.电阻测试法在立木腐朽检测中的应用研究进展[J].森林工程,2013,29(6):47-51.Bao Z Y,Wang L H.Application of electrical resistance testing method in detection of decay in standing trees[J].Forest Engineering,2013,29(6):47-51.
[7]高华,田蔚风.一种高电压小功率交流恒流源的设计[J].计量技术,2006(9):42-43.Gao H,Tian W F.Design of a high voltage and low-power AC current source[J].Measurement Technique,2006(9):42-43.
[8]丁志杰,赵志伟,吕明召.新型高精度数控交流恒流源的设计[J].电子测量技术,2015,38(8):41-44.Ding Z J,Zhao Z W,Lv M Z.The design of a new high-precision digital controlled[J].Electronic Measurement Technology,2015,38(8):41-44.
[9]Xie S,Fan Y,Zhou D.Research on a novel inverter based on DC/DC converter topology[C].Industrial Electronics Society,2003.IECON'03.Conference of the IEEE.IEEE,2003,1:647-651.
[10]王玉婷,徐华东,王立海,等.环境温度对活立木横截面电阻值的影响[J].南京林业大学学报(自然科学版),2016,40(4):143-148.Wang Y T,Xu H D,Wang L H,et al.Effects of environmental temperature on the electrical resistance on the cross section in standing tree[J].Journal of Nanjing Forestry University(Natural Sciences Edition),2016,40(4):143-148.
[11]Lin C J,Chung C H,Yang T H,et al.Detection of electric resistivity tomography and evaluation of the sapwood-heartwood demarcation in three Asia gymnosperm species[J].Silva Fennica,2012,46(3):415-424.
[12]王兴龙,王立海.白桦模拟缺陷材的电阻层析成像规律探究[J].林业工程学报,2016,1(2):106-111.Wang X L,Wang L H.Research on electrical resistance tomography of birch logs with artificial simulating defects[J].Journal of Northeast Forestry,2016,1(2):106-111.
[13]Cho J G,Rim G H,Lee F C.Zero voltage and zero current switching full bridge PWM converter using secondary active clamp[C].Power Electronics Specialists Conference,1996.Pesc'96 Record.IEEE.IEEE,1996,1:657-663.
[14]Peterchev A V,Sanders S R.Quantization resolution and limit cycling in digitally controlled PWM converters[J].IEEE Transactions on Power Electronics,2001,18(1):301-308.
[15]孙学东,陶新民,曲艺卓,等.基于电阻断层成像技术的立木探伤检测系统[J].应用科技,2017,44(4):40-48.Sun X D,Tao X M,Qu Y Z,et al.Tree flaw detection system based on electrical resistivity tomography[J].Applied Science and Technology,2017,44(4):40-48.
[16]涂戈.电阻抗成像系统设计[D].成都:电子科技大学,2015.Tu G.The design of electrical impedance imaging system[D].Chengdu:University of Electronic Science and Technology of China,2015.
[17]郭康.三维电阻层析成像(ERT)硬件系统设计[D].沈阳:东北大学,2014.Guo K.Design for three-dimensional electrical resistance tomography(ERT)hardware system[D].Shenyang:Northeastern University,2014.
[18]李有余.电阻抗断层成像硬件系统的研究[D].天津:河北工业大学,2003.Li Y Y.Research on hardware system of electrical impedance tomography[D].Tianjin:Hebei University of Technology,2003.