| 摘要 |
The invention is a method and apparatus for measuring the dimensions of a parcel. The invention begins by placing a parcel in a corner of a field of measurement comprising a flat surface which is preferably a weighing scale, and meeting two upright adjacent walls; each of the walls have at their base a corresponding calibrated reflective strip. A laser scanner emitter is activated and directs a beam toward a rotating polygonal mirror, so as to deflect the beam towards a parabola which further deflects the beam across the reflective strip of the first wall, across the parcel, and then across the second wall. The beam is reflected from the reflective tape back toward the parabola and, back toward the polygonal mirror and on to the emitter scanner. Upon receiving the returned beam, the emitter scanner will record a pattern of reflected light which is demonstrative of the location of the parcel within the field of measurement. The recorded pattern of reflected light is transmitted to a data processing system which calculates the length and the width of the parcel by comparing the pattern to a data table located in the data processing system. After recording the reflected light indicative of the height and width, the rotating polygonal mirror is raised, under control of the data processing device, so as to redirect the beam upward so as to determine a height for the parcel.
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