Abstract:In order to protect the safety of operators and to prevent leakage of cutting fluid, modern numercial control (NC) machine tool is all installed with protective cover, which makes difficulty for wiring and point allocation of sensors for online monitoring on site. Aiming at the existing problems of traditional online vibration sensor such as high power consumption, difficult in wiring and point allocation on the sealed protective cover, a wireless vibration instrument based on the Android system and CC2540 single chip microcomputer was developed. The wireless transmission and online parametric setup of measurement, real time data display and storage functions were achieved by the measuring instrument combined with Android system and Bluetooth. The wiring problem of sensors was effectively solved by wireless transmission. The pretreatment and collection of vibration signal were completed by the measuring modules with CC2540 as central control unit, which was embedded with Bluetooth modules at low power consumption and the Android system to implement the communication of fullduplex communication, to save data in TF card or in cloud hosting. The actual tests show that the instrument can be used to accurately measure the vibration acceleration signal, and can be used to accurately send and receive data through the Bluetooth modules and Android mobile phone, which is convenient, simple operation and also good in application prospect. It provides reference for development of other new types of wireless measuring instrument.