Ancient Canoe Weighing
Tension Weigh Module for Ancient Canoe Restoration
With the continuous advancement of archaeology, the excavation, restoration, and preservation of ancient artifacts have become increasingly important, especially in underwater archaeology and the excavation of ancient boats. A 5,000-year-old canoe was discovered in the Liangzhu Cultural Village, a significant cultural heritage with immense historical and archaeological value. However, its excavation, preservation, and restoration present multiple risks and challenges. Once exposed to air, the canoe’s rapid moisture content change and environmental shifts could lead to its deterioration, causing this 5,000-year-old relic to vanish from history.After excavation, the canoe undergoes several stages, including surface cleaning, support positioning, desalination and decolorization, thermal infiltration, and freeze-drying. The freeze-drying stage is particularly crucial, as it involves freezing the canoe at -40°C for 1-2 months, followed by vacuum high-temperature dehydration and stabilization for another 1-2 months. During this process, the load cell must maintain high precision in these harsh conditions, accurately monitoring the canoe’s weight to determine when the freeze-drying process is complete.
Challenge
- The sensor must operate continuously in temperatures ranging from -40°C to +90°C, requiring data stability over prolonged exposure to extreme temperatures.
- It needs to function in a vacuum environment, ensuring that the sensor’s performance remains unaffected by the vacuum conditions.
- It must withstand high humidity, requiring the sensor to resist moisture and avoid any impact on performance.
Solution
- The sensor uses custom high- and low-temperature strain gauges, with added temperature compensation and fatigue testing to ensure data stability.
- It incorporates specialized vacuum-sealed materials with excellent electrical insulation, chemical stability, broad temperature range, and low volatility. The elastomer materials undergo special polishing and inspection, and aerospace-grade vacuum cables are used to enable the sensor to operate in a vacuum environment.
- A three-layer sealing system is employed, including strain gauge protection, two layers of vacuum material sealing, and cap sealing. This multi-layer protection effectively prevents moisture from affecting the sensor’s performance.
Conclusion
In the future, we aim to further enhance the performance of strain-based load cells in specialized environments, providing crucial support for broader applications.
Featured Products
101NH
S-Beam Load Cell
See standard version.
- OPTION: Stainless Steel or Alloy Steel
- Threaded mounting holes allow easy mounting to most fixtures
- Versatile design fits wide range of applications
The 101NH S-beam is an OIML C3/C4.5 and NTEP-approved S-beam suited to a wide variety of applications due to its simplicity, ease of installation, and overall reliability. This IP67 water-resistant S-beam is also interchangeable with Rice Lake RL20000, Revere 363, Coti Global CGSB / CSGB-1, and more
101NHM2
Tension Weigh Module
See standard version.
- Material: Alloy Steel and Stainless Steel
- Capacity: 50lb-10Klb
- Stray currents can go through the grounding strap bypassing the load cell
- Allows for high accuracy tension loading
The 101NHM2 install the bottom rod end bearings & clevises 90 disposed from top set to achive better performance.
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