LIANG Bang-wei, WEI Jia-hong, LIU Chong, et al. Design on sensor node performance testing system based on vibration signal[J]. 2015, 34(10): 83-85+89. DOI: 10.13873/J.1000-9787(2015)10-0083-03.
Sensor nodes are used to collect vibration signal of rail in order to analyze vibration characteristics of railway. To test working performance of sensor nodes
design and realize testing system. Which can provide stable vibration signal based on MCU MSP430
the testing system consists of control unit
vibration exciter
simple supported beam and monitoring software. Experiments show that in definite loading condition
the system can steadily offer 10 N of force
93 × 10- 6of dynamic strain in maximum and 97 gnof acceleration in maximum.Through analyzing time-frequency characteristics of collecting data