 Strainstall have supplied an Anchor Tension Monitoring System that utilises underwater strain rings for an offshore floating unit in South America. The strain rings measure the strain imparted to the chain stopper trunnions from the anchor chain, and are attached to the trunnions to determine strain versus tension. The outputs from the strain rings are then converted to 4-10mA by Strainstall Intrinsically Safe amplifiers for transmission back to the display station, where the tensions are display, historical data logged and alarms provided.
The strain rings offer many advantages over other types of sensors due to their ease of installation and removal, but also because of their large ± linear strain range, suitability for prolonged immersion in depths of up to 100m and being highly accurate. Additionally, because the sensors measure the load in existing structural members, there are no strength concerns relating to the sensors themselves.
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