Reader-writer unit, communication control method of the reader-writer unit, reader-writer unit communication control program, and the parking fee adjustment machine

摘要

PROBLEM TO BE SOLVED: To prevent communication interference which occurs when a plurality of reader-writer parts of non-contact wireless type are installed side by side, with a simple and inexpensive composition.;SOLUTION: A central fee adjusting machine 1 for adjusting a parking fee, drives and controls reader-writer parts 18, 19 by alternately switching the reader-writer parts at each prescribed time period. Namely, only either one of the reader-writer parts is always controlled. No specific electrical circuit is required to prevent communication interference. The reader-writer part 18 for optional service is disposed on the right side of a front panel 1a of the central fee adjusting machine 1. When a user stands toward the central fee adjusting machine 1, therefore, the reader-writer part 18 for optional service is located in a position near to a right hand as a dominant hand for most users.;COPYRIGHT: (C)2010,JPO&INPIT