Meanwhile the paper analyzes the deficiency of current transmission coding and describes a new data transformation method, base91 coding with high encoding efficiency but low data extension.

In the vertical circulating parking equipment, the power device drives the chain transmission system , and the latter pulls the cages to circulate through the chain extension components.

The system, which consists of one body module and a number of extension modules, achieves one point-to-multipoint data transmission based on master-slave mode.