A multi-point displacement meter based on a porous casing and a plug-in measuring rod
By using an integrated multi-channel sleeve and a pluggable Invar probe, the problems of low accuracy, large temperature error, and non-replaceable probes in existing multi-point displacement gauges for rock creep monitoring are solved, achieving high-precision, convenient installation, and low-cost multi-point displacement monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- POWER CHINA KUNMING ENG CORP LTD
- Filing Date
- 2026-05-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing multi-point displacement gauges have low accuracy in long-term monitoring of rock mass creep at the millimeter level and below. Temperature changes introduce large errors, the gap between the measuring rod and the protective pipe is prone to bending, the measuring rod cannot be replaced and is costly, and large-diameter drilling is required.
It adopts an integrated multi-channel sleeve and a pluggable Invar probe. The sleeve has multiple isolated probe channels and auxiliary channels. The auxiliary channels are injected with anti-rust lubricant. The probe channels are equipped with a pluggable locking structure, which consists of male and female parts. It is compatible with small-diameter probes and can be plugged in and replaced.
It achieves long-term monitoring with sub-millimeter accuracy, suppresses temperature deformation and bending errors, is easy to install and maintain, reduces construction costs, and is adaptable to various drilling layouts.
Smart Images
Figure CN122408682A_ABST