When sailing in waves, ship hull total bending deformation will reduce the center distance of gear backing radially arranged in ship hull.
船舶在波浪中航行时，船体总弯曲变形会使沿船体纵向布置齿轮机构的轴承支座中心距产生缩减。
2
Using ultrasonic wave intelligent distance-measuring sensor and voice record-reproducing circuit, a voice anticollision-prompting device for backing an automobile is designed.