If the distinguish ability of image grabber is .7pixel/mm, the precision of displacement measurement can achieve 0.00080mm.
If the distinguish ability of image grabber is .7pixel/mm, the precision of displacement measurement can achieve 0.00080mm.
若图像记录设备的分辨率是.7pixel/mm(0.080mm/pixel),本文所涉及到的桥梁裂缝边缘的位移测试精度为0.00080mm。