Crane safety device for preventing truck jostling and/or hatch cover detection

摘要

A safety device is disclosed for a gantry crane configured to lift containers from a truck driven chassis. The safety device estimates truck movement when the gantry crane lifts the container and sends an alert to avert lifting the truck when the container fails to decouple from the chassis. Motion sensors are disclosed that are configured to coupled to a trolley of a gantry crane and used to create an estimate of the front or back region near a container being lifted. A processor may use the motion sensor signals to avert lifting the truck and/or to avert an Optical Character Recognition (OCR) system reporting a container identification failure when a hatch cover is lifted off of a ship. In various embodiments, the processor may be included in the safety device and/or in the OCR system.

主权项

1. A safety system adapted for attachment to a crane, comprising:
a motion sensor attached to a crane trolley, comprising:
a light source positioned to emit light downward onto a truck coupled to a chassis carrying a container when the crane trolley is positioned for lifting the container; anda light detector positioned to receive light from the light source reflected upward from the truck; a processor attached to the crane, said processor configured to create an estimate of truck motion in response to a motion sensor signal from said motion sensor; and an alert generated by said processor when said estimate of truck motion indicates the container failed to decouple from the chassis, wherein said safety system is configured to avert the truck from being lifted by the crane when said processor generates said alert.