Abstract
A novel low frequency (0.1~100 Hz) sinusoidal pressure generator based on magnetic liquid is proposed in this paper. The generator can generate sinusoidal pressure with a frequency same as the frequency of the exciting current, and can be used in the dynamic calibration of micro differential pressure transformer. Based on the theory of forced vibration system with single degree of freedom, the relation between input electrical signal and output pressure signal is deduced. The magnetic field distribution in the generator and the magnetic force acting on the magnetic liquid are analyzed using finite element method (FEM). An experimental platform was built for testing the performance of the signal generator. Test results are given, based on which the natural frequency and damping ratio of the system are obtained. Experiment results show that the test results are consistent with theoretical analysis.
| Original language | English |
|---|---|
| Pages (from-to) | 801-806 |
| Number of pages | 6 |
| Journal | Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument |
| Volume | 32 |
| Issue number | 4 |
| State | Published - Apr 2011 |
| Externally published | Yes |
Keywords
- Differential pressure sensor
- Magnetic field
- Magnetic liquid
- Sinusoidal pressure generator
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