采用基于MOSFET的多开关自动零设置的钻孔压力计的范围扩展.
Chen Yang1,2, Zheng Chen1, Hong Li1
1National Institute of Natural Hazards, Beijing 100085, China.
Sensors (Basel, Switzerland)
|January 25, 2025
概括
这项研究引入了一种新的全方位测量系统,用于钻井压力计,增强地变形监测. 该系统使用自动零设置来扩大测量范围,同时保持高精度.
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:
- 钻孔压力计对于观察地变形至关重要.
- 长期监测面临的挑战是由于传统压力计的测量范围限制.
- 在不牺牲精度的情况下扩大测量范围是一个关键的技术障碍.
研究的目的:
- 开发一个全方位的测量系统,用于钻井压力计.
- 为了克服现有的钻井压力计的有限测量范围.
- 在延长地变形观测期间保持高精度.
主要方法:
- 开发了一个全方位测量系统,使用双向模拟多开关 (MOS晶体管) 和自动反控制.
- 实现了自动零点调整,以保持测量桥在近平衡状态.
- 量化零设置作为自动全范围测量的等效电压.
主要成果:
- 该系统有效地利用了微分电容传感器的线性范围.
- 实验室测试证实该系统能够覆盖传感器有效线性范围约为100微米.
- 配备了该系统的RZB钻井压力计证明了成功的全程测量.
结论:
- 开发的自动零设置范围扩展系统显著提高了钻井压力计的能力.
- 这一创新使得动态地变形的高精度多年监测成为可能.
- 该系统解决了地质物理观测仪器仪表的关键挑战.
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