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首页> 外文会议>Sensing for Agriculture and Food Quality and Safety IX >Automated Surface-Scanning Detection of Pathogenic Bacteria on Fresh Produce
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Automated Surface-Scanning Detection of Pathogenic Bacteria on Fresh Produce

机译：新鲜产品上病原细菌的自动表面扫描检测

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摘要

This paper investigates the effects of surface-scanning detector position on the resonant frequency and signal amplitude of a wireless magnetoelastic (ME) biosensor for direct pathogen detection on solid surfaces. The experiments were conducted on the surface of a flat polyethylene (PE) plate as a model study. An ME biosensor (1 mm × 0.2 mm × 30 μm) was placed on the PE surface, and a surface-scanning detector was brought close and aligned to the sensor for wireless resonant frequency measurement. The position of the detector was accurately controlled by using a motorized three-axis translation system (i.e., controlled X, Y, and Z positions). The results showed that the resonant frequency variations of the sensor were -125 to +150 Hz for X and Y detector displacements of ± 600 μm and Z displacements of +100 to +500 μm. These resonant frequency variations were small compared to the sensor's initial resonant frequency (< 0.007% of 2.2 MHz initial resonant frequency) measured at the detector home position, indicating high accuracy of the measurement. In addition, the signal amplitude was, as anticipated, found to decrease exponentially with increasing detection distance (i.e., Z distance). Finally, additional experiments were conducted on the surface of cucumbers. Similar results were obtained.
机译：本文研究了表面扫描检测器位置对固体表面直接病原体检测的无线磁弹性（ME）生物传感器的共振频率和信号幅度的影响。实验在平板聚乙烯（PE）平板的表面上进行，作为模型研究。将ME生物传感器（1 mm×0.2 mm×30μm）放在PE表面上，并使表面扫描检测器靠近并对准传感器以进行无线共振频率测量。通过使用电动三轴平移系统精确控制检测器的位置（即受控的X，Y和Z位置）。结果表明，对于X和Y检测器位移±600μm和Z位移+100至+500μm，传感器的共振频率变化为-125至+150 Hz。与在检测器原始位置测得的传感器初始共振频率（<2.2 MHz初始共振频率的<0.007％）相比，这些共振频率变化较小，表明测量精度很高。另外，如所预期的，发现信号幅度随着检测距离（即Z距离）的增加而呈指数下降。最后，在黄瓜表面进行了额外的实验。获得了相似的结果。

著录项

  • 来源
  • 会议地点 Anaheim(US)
  • 作者

    Shin Horikawa; Songtao Du; Yuzhe Liu; I-Hsuan Chen; Jianguo Xi; Michael S. Crumpler; Donald L. Sirois; Steve R. Best; Howard C. Wikle; Bryan A. Chin;

  • 作者单位

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

    Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetoelastic biosensor; surface-scanning detector; wireless detection;

    机译：磁弹性生物传感器表面扫描探测器无线检测;

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