To realize serial communication between acceleration sensor and virtual instrument（ VI）

Lab VIEW

and transmission medium is rolling bearing vibration signal. Write C language program to drive three-axis acceleration sensor to collect bearing vibration signal

then transmits vibration signal into micro controller unit（ MCU）

afterwards

VI reads vibration signal in MCU via USB to serial line

and the signal is displayed on VI interface in real time in form of waveform. Acceleration sensor can collect bearing vibration signal

at the same time

value of vibration signal can be displayed in programming software

through a serial port communication program

the numerical wave 00—FF transformed by vibration signal is able to be displayed on VI front panel; by software analysis

it can be found that root-mean-square of bearing is 0. 030 782 3

through frequency domain processing

characteristic frequency 25 Hz and high-order harmonic component are isolated separately by power spectrum

consequently

serial port communication between sensor and VI is achieved.