ELECTROMAGNETIC VIBRATION ENERGY HARVESTER FOR URBAN RAIL TRANSIT BRIDGE HEALTH MONITORING

摘要

An electromagnetic vibration energy harvester for urban rail transit bridge health monitoring includes a housing, and a spring component, a mass block, a coils and two permanent magnets arranged in the housing. The spring component, two permanent magnets are provided with opposite poles facing each other. The spring component is provided between the two permanent magnets. The coils are provided in the upper end of the spring component; the mass block is provided in the coils. The mass block, coils, the total stiffness of the spring component and the natural frequency of the energy harvester satisfy the equation: ƒ=(k/4mπ²)^1/2 where m is the mass of the mass block (unit: kg); k is the total stiffness of the spring component (unit: kN/m); ƒ is the natural frequency of the energy harvester with the value ranging from 5-6 Hz.