Vehicle-portable grid assessment device

Abstract

A vehicle-portable grid assessment device is capable of being lowered onto a rail system device for assessing a top of a framework structure of a storage grid in an automated storage and retrieval system. The framework structure includes a rail system. The rail system includes a first set of parallel rails arranged to guide movement of a container handling vehicle in a first direction across the top of the framework structure, and a second set of parallel rails arranged perpendicular to the first set of rails to guide movement of the container handling vehicle in a second direction across the top of the framework structure that is perpendicular to the first direction. The first and second sets of parallel rails dividing the rail system into a plurality of grid cells. The framework structure includes upright members to support the rail-system and at least one container handling vehicle operating on the rail system. The device includes a body with a pivoting arm on at least one side. Each pivoting arm is positioned in the center on each side. Each pivoting arm has a rail contactor at either end and is pivoted around a central point of the pivoting arm corresponding to a balance point of the device. There is a tilt sensor attached to at least one of the pivoting arms for measuring the angle of the pivoting arm in relation to a horizontal level.