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Background
Background
Ground Metrics Inc. creates and tests technology often used by survey companies. Currently, Todor Petrov is working on optimizing the performance of his existing ground imaging sensors (eQube™). These sensors are highly sensitive and have a coupling bag which sits between them and the ground in order to increase sensor performance. The current bag design is functional, but has a high cost due to the frequent required maintenance.
Objective
The primary objective is to have a new coupling bag design which requires less maintenance, while maintaining (or improving) the current sensor performance. Long-term performance is determined by the coupling bag's ability to retain moisture throughout the bag. With the original coupling bag design the area between the coupling bag and the ground remains saturated for a long time, while the area between the sensor and the coupling does not maintain its moisture level for long (~6 hours). As a result, in order to maintain sensor performance, Ground Metrics Inc. is forced to hire people to refill the coupling bags regularly.
Summary of Improvements
Summary of Improvements
Water loss in the original coupling bags occur primarily through the seams, the Velcro seal, and naturally through the pores of the silk cloth. The new bag design addresses all three of these areas of water loss.The new bag design is composed of two silk bag, one of which is slightly smaller and placed inside the other silk bag; the inner silk bag is covered with a windowed, pink, anti-static bag (made of Polyethylene) for its acceptable noise performance as well as reduced water loss. The new coupling bag design shows a ~85% water loss reduction compared to the original silk bags.
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