ASI bus-based extension system

The invention discloses an ASI bus-based expansion system, which comprises an ASI master station and a slave station; the slave station comprises a protocol conversion module and an MCU module; the protocol conversion module is used for mutually converting a sine square analog signal on an ASI bus and a digital signal of the MCU module; the MCU module receives a signal of an external input end, reads and processes the signal, converts the signal into a set slave station response format and transmits the slave station response format to the protocol conversion module. According to the invention, by expanding the interface of the ASI bus system, serial expansion and parallel expansion can be realized, the number of the input ports is expanded under the condition that external conditions arenot changed, and the application cost is reduced. 本发明公开一种基于ASI总线的扩展系统，包括ASI主站以及从站，所述从站包括协议转化模块和MCU模块，其中：协议转化模块用以将ASI总线上的正弦平方模拟信号与MCU模块的数字信号进行相互转换；MCU模块接收外部输入端的信号读入并处理之后，转化成设定的从站响应格式传至协议转化模块。本发明通过对ASI总线系统的接口进行扩展，既可以实现串行扩展，也可以实