基于信息钮扣的智能公交投币箱的设计

Design of Smart Bus Coin Boxes Based on iButton

为了提高公交车投币箱的安全性,系统采用信息纽扣DS1991的密钥开启投币箱的密码锁。DS1991是进行读/写操作的数据载体,它有3个独立的电子密钥,提供1 152位安全、非易失存储器。每个密钥分区都有64位密码和识别区,可以避免因密码锁安全性能差而导致车票失窃的事件发生。为了使公交公司的运营效率不受假硬币的影响,系统采用电涡流传感器检测硬币的真假,可有效地防止乘客使用假硬币乘坐公交车。实践证明:该系统解决了长期困扰公交公司票款被盗的问题,并且提高了公司的运营效率。该系统具有很高的推广价值。

In order to improve the security of bus coin boxes, the system uses key of the iButton DS1991 to open the password lock of coin boxes. The DS1991 is a rugged read/write data carrier that acts as three separate electronic keys,offering 1152 bits of secure,nonvolatile memory. As each secure memory block is 64 - bit password and ID fields, it can prevent the event that the cash in coin boxes are stolen for poor security of password lock. To reduce the false coins influencing efficiency of public traffic company ,the system uses eddy current sensor to detect the false coins, which can effectively prevent the use of the false coins. The system has solved the long - term problem that the cash in coin boxes are stolen,and it has improved the efficiency of public traffic company. The system has very high generalizing value.