摘要
为了有效提高图像精度,提出并构建基于光学层析的电阻率图像重建系统。首先构建电阻率图像重建系统的总架构,系统硬件由仪表放大器、带通滤波、模拟乘法器、低通滤波器、单片机和AD转换等部分组成,在硬件设计的基础上软件程序运行起始阶段先初始化,接着上位机传输采集指令至下位机,下位机配置激励电极对与采集电极对,并通过AD7705转换实现调理之后的整体模拟电压信号A/D。将A/D转换的各位数据和增益分为三次传输至计算机。最终依据软件流程获取的迭代结果运用位场反演实现对电阻率图像的重建。实验结果表明,系统的图像重建精度高,可靠性强。
In order to improve the image accuracy effectively,a resistivity image reconstruction system based on optical tomography is proposed and constructed.Firstly,the general architecture of resistivity image reconstruction system is constructed.The hardware of the system is composed of instrument amplifier,band-pass filter,analog multiplier,low-pass filter,single-chip microcomputer and AD conversion.On the basis of hardware design,the software program is initialized at the initial stage.Then the upper computer transmits the acquisition instruction to the lower computer,and the lower computer is configured with the excitation electrode pair and the acquisition electrode pair.The data and the gain of whole conditioned analog voltage signal A/D by AD7705 conversion are transmitted to computer in3 times.Finally,according to the iterative results obtained by software process,the inversion of potential field is used to reconstruct the resistivity image.The experimental results show that the system has high precision and reliability.
作者
饶竹一
张云翔
王忠军
RAO Zhuyi;ZHANG Yunxiang;WANG Zhongjun(Sun Yat-sen University,Guangzhou 528400,China;Shenzhen Power Supply Bureau Co.,Ltd,Shenzhen Guangdong 518001,China;Shenzhen Contop Information Technology Co.,Ltd.Shenzhen Guangdong 518000,China)
出处
《激光杂志》
北大核心
2020年第7期85-89,共5页
Laser Journal
基金
广东省基金项目(No.SZKJXM20180047)。
关键词
光学层析
电阻率
图像重建
位场反演
optical tomography
resistivity
image reconstruction
potential field inversion
