Enhanced proximity alert system and method
AssigneeRam Lifting Technologies Pte. Ltd.
InventorsChun Wei Cheah, Abdul Rashid Bin Arifin, Ghee Hua Ng
Life of this patent
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Abstract
A method for detecting whether a tag is proximate to a spreader, the method comprising the steps of: detecting the tag by a sensing device mounted to the spreader; locating the tag in a danger zone relative to the spreader, and then; activating a danger zone alarm to an operator of the spreader; if the tag is no longer located in the danger zone; determining if the tag has entered a caution zone; if the tag is located in the caution zone, then clearing the danger zone alarm; if the tag has not been located in the caution zone or the danger zone, then; maintaining the danger zone alarm.
Claims7
A method for detecting whether a tag is proximate to a spreader, the method comprising:
- detecting the tag by a sensing device mounted to the spreader;
- locating the tag in a danger zone relative to the spreader, and then activating a danger zone alarm to an operator of the spreader;
- if the tag is no longer located in the danger zone, determining if the tag has entered a caution zone;
- if the tag is located in the caution zone, then clearing the danger zone alarm;
- and
- if the tag has not been located in the caution zone or the danger zone, then maintaining the danger zone alarm.
A system for detecting whether a tag is proximate to a spreader, the system comprising:
- one or more sensing devices arrange to detect the tag by a sensing device mounted to the spreader;
- said one or more sensing devices in communication with a control system;
- said sensing devices arranged to locate the tag in a danger zone relative to the spreader;
- said control system, on receipt of a signal from the one or more sensing devices, arranged to activate a danger zone alarm;
- the control system further arranged to clear the danger zone alarm if the sensing devices detect the tag has entered a caution zone;
- and
- if the sensing devices no longer detect the tag in either the danger zone or caution zone, the control system is arranged to maintain the danger zone alarm.
Dependencies are inferred from the claim text.