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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.

Challenge

Once exposed to air, the canoe’s rapid moisture content changes 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.
  1. The sensor must operate continuously in temperatures ranging from -40°C to +90°C, requiring data stability over prolonged exposure to extreme temperatures.
  2. It needs to function in a vacuum environment, ensuring that the sensor’s performance remains unaffected by the vacuum conditions.
  3. It must withstand high humidity, requiring the sensor to resist moisture and avoid any impact on performance.

Solution

  1. The sensor uses custom high- and low-temperature strain gauges, with added temperature compensation and fatigue testing to ensure data stability.
  2. 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.
  3. 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

The development of ANYLOAD’s vacuum high- and low-temperature load cell faced numerous challenges. However, through the selection of materials, improved temperature compensation, and enhanced sealing methods, the sensor has been designed to maintain high precision under extreme conditions.
In the future, we aim to further enhance the performance of strain-based load cells in specialized environments, providing crucial support for broader applications.
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Keywords:

Ancient canoe weighing, archaeological weighing, underwater archaeology, artifact preservation, freeze drying, tension weigh module, load cell, weight monitoring, vacuum environment, extreme temperature, moisture monitoring, precision weighing, industrial weighing, cultural heritage, restoration process, sensor technology, load measurement, high accuracy, environmental monitoring.

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