Research On Digital Sensor Technology In The Vibration Parameter Monitoring

Vibration is the one kind of manifestation during substance movement. Monitoring of vibration has been widely applied in many fields, such as aerospace, industrial control, medical and health, environmental monitoring and so on. Vibration signal, especially in some special circumstances may lead to fatigue structural damage, instantaneous damages beyond the threshold value, equipment failure and poor performance and other issues, even an irreversible impact on the life cycle of the system, so the vibration parameters monitoring plays a vital role in avoiding or reducing the impact caused by the vibration signal. Currently, the monitoring of vibration parameters mainly uses analog sensor monitoring. In that way, the signal precision is low and also the anti-interference ability; the monitoring of multiple points adopts long-term way for the most part, but it contains too much connecting cables and has high electromagnetic interference. The realization of digital sensors not only enhanced the anti-jamming capability of the signal, but also can achieve highly efficient compensation among the zero signal, non-linear and so on; application of CAN bus system can reduce the number of cables, save costs, enhance the anti-interference ability during signal transmission, and improve the reliability and stability of signal transmission.Based on CAN-bus connection, adopting digital sensor technology, a monitoring of vibration parameters has been designed. Design with microcontroller C8051F060 as the core, the idea of modular design, realized the digitalization of the 1521 series of vibration sensor; an analog-digital conversion of the sensor signal uses the built-in single-chip 16-bit ADC to achieve; in order to reduce the error among the zero drift due to the sensor operating temperature changes, non-linear and so on, it can use a microprocessor, which is powerful in data processing capability and fast computing capability of C language, to compensate the zero drift in temperature; the system is also carried out the hardware design and software implementation in the CAN bus communication, which use many sensor nodes attached to the physical CAN bus to achieve reliable sensing signal transmission and control. Through the vibration test connected with host computer, the feasibility and the overall performance of the system was verified.Results of experiment show that this digital sensor technology can enhance the anti-jamming capability, the signal acquisition accuracy and stability of transmission, and the complexity of the system are largely reduced, with a certain reliability and feasibility.