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相关概念视频

Measurements of Strain01:27

Measurements of Strain

1.3K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
1.3K
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

445
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
445
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

59
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
59

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相关实验视频

Updated: Jul 19, 2025

Production of a Strain-Measuring Device with an Improved 3D Printer
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一个基于FPGA的多通道钻井应变测量和采集系统.

Xin Xu1,2, Zheng Chen1, Hong Li1

  • 1National Institute of Natural Hazards, Beijing 100085, China.

Sensors (Basel, Switzerland)
|August 12, 2023
PubMed
概括

这项研究介绍了一种基于现场可编程门阵列 (FPGA) 的系统,用于测量钻孔应变. 新系统提高了地质物理和地变形观测的信号清晰度和准确性.

关键词:
钻井孔张力计 钻井孔张力计地变形的观察地变形的观察多道数据采集多道数据采集阶段敏感检测检测器

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科学领域:

  • 地质物理学 地质物理学
  • 地球科学 地球科学 地球科学
  • 仪器化 仪器化 仪器化

背景情况:

  • 传统的钻井应变测量系统通常依赖于模拟电路,其处理能力和灵活性可能受到限制.
  • 改善信号噪声比和动态范围对于准确的地质物理观测至关重要.

研究的目的:

  • 设计和验证一个基于现场可编程门阵列 (FPGA) 的钻井井应变测量系统.
  • 利用数字信号处理来提高数据质量和系统适应性.

主要方法:

  • 在FPGA上广泛使用数字信号处理操作来取代模拟电路.
  • 数据过和无声化以改善信号噪声比.
  • 将动态范围扩大到130dB,删除信号放大电路,并降低激发电压.

主要成果:

  • 达到高于1μV的电压分辨率.
  • 在低频带中成功记录了清晰的固体潮.
  • 精确捕获高频频段的地震波压力,包括S和P波到达时间和相.

结论:

  • 基于FPGA的系统为钻井孔应变测量提供了更好的灵活性,效率和观察准确性.
  • 该系统满足地质物理场变形观测的严格要求.
  • 这项技术对未来的地质物理和地变形分析具有重大潜力.