Research on subway acceleration measurement method based on magnetic levitation technology

In order to realize the subway acceleration measurement, a magnetic suspension vibrator structure was adopted, and a magnetic suspension acceleration measuring system was designed. The magnetic field variation in the acceleration process was analyzed and simulated by using simulation software. The dynamic equations of the magnetic suspension vibrator under the accelerated motion were deduced. The sensitivity of the measurement system is improved because the method can effectively overcome the friction that the traditional accelerometer can not be avoided. The performance of magnetic levitation acceleration measurement system was analyzed by experimental results. The acceleration of Metro locomotive was measured practically, and the feasibility of the system was verified by taking the experimental data of 3D gyro accelerometer as reference. The experimental results show that the sensitivity of this method is higher. The design method provides a new idea for the design of acceleration sensors.