Abstract:

A modular multi-channel strain signal acquisition system is designed for large quantities of resistive strain gauge data acquisition and transmission in aircraft intensity monitoring.The entire system composed of three modules cascaded together can simultaneously capture 4096 strain signals.CPLD is used to achieve the 4096 analog signal multiplexing and data encoding and decoding,and data are transmitted to the remote using optical transmission technology.The design is suitable for all applications (120 Ω) signal acquisition using resistive strain gages.

Key words: aircraft strength;strain gages;CPLD