Shuttle Radio:

This technology is one of the other unloading and storing systems of goods in compact storehouses producing in automatic and semi-automatic forms. In this system, Shuttle or Pallet Transmitter is in charge of moving goods module so it is named Shuttle Radio for its addressing ability by Radio waves (in order to guide loading and unloading goods operation). Shuttle Radios are appropriate options to be used in storehouses of high compression and it is an acceptable method in automation or mechanization because of its wide capacity and higher speed operation than most of other mechanization methods. This technology can operate loading and unloading modules and follow FIFO and LIFO systems and perform loading and unloading goods operation from one side of the shelves. But for following FIFO, uploading module should be from one side and unloading it from another side that it is actually possible via establishing shelves in the center of storing hall and bracing it to structure roof.

Generally this technology is consisted of three parts:

• Shuttle
• Shuttle loading equipment in the first part of aisle or preferred cell (including forklift, automatic or semi-automatic elevator, automated storage retrieval machines).
• Racking (the structure which provides the shuttle movement and proper space for storing goods module).

A commonest use of shuttle is for linear single-dimension movement. Single-dimension linear shuttles transmit, arrange and load goods module just in shuttle movement aisle. This shuttle needs a rail-like space in both sides of the given corridor in order to move deep into the shelves so that that equipment can move on lateral rails of the shelves by its wheel without any vibration or additional fluctuation. One of the most significant changes occurred in shuttle technology is improving transmission method in floors and having a quick access to all the floors of each shelf. Noteworthy to add that, transmission equipment is used to move the shuttles since there is more than a shuttle in each aisle.

In this technology, many types of forklift is used to optimize workflow operation and also to facilitate the movement of transmission equipment that is between the floors and also in vertical line. It well worth to know the movement of a shuttle from one floor to another is along with pitching it on transmission equipment.

Another kind of shuttle system that is called two-dimensional shuttle can cover moving to the length as well as to the width. Of the most advantage of this shuttle is maximum servicing coverage with minimum number of shuttle.

The most progressive shuttle is called three-dimensional one. It is a smart way for creating an active system that is highly capable so that we can observe visible properties with light automatic storage and retrieval system (with a weight range of less than 100 kilograms).

In this kind of technology, the other significant change is loading and unloading capability from two sides of the shuttle that prevent the direct movement of shuttle into shelves and devolve loading and unloading operations just to the shuttle arms. This feature increased the depth of loading to more than a module in neighboring cells that it causes to omit additional aisles and hence to increase storage capacity.

But one of the most advanced kind of shuttle named Shuttle Rack as a full-automatic system includes a combination of shuttle and automatic forklift that can compete with the other outstanding technologies in Light Storage Automation because of the specific functions of the given shuttle here (to name a few is moving along the corridor without any need to equip transmitters, simultaneous with loading and unloading possibility in both sides of shuttle).

One of the other methods to transmit applied shuttle is using stacker Crane that is so called automated shuttle storage-retrieval system. In this method, shuttle has been put on stacker Crane carriage entered to the cell instead of Antennae so it carries out loading and unloading operations in deep loading places.