Design of Strips Size Meter Based on CCD

A strips size meter was designed based on CCD image sensor for measuring the area of strips to be used as an indication of thresher's performance.The meter consists of a tobacco dispersing device composed of working platform,spring plates,electromagnet and armature,the light source is placed right under the lens,it makes up an image acquisition device in combination with the said working platform.CCD image sensor and tobacco dispersing device work coordinatively under the control of a single chip microcomputer,which collects data frame by frame periodically,converts the video signals into binary data via a binary circuit,and computes strips area and proportion.Comparing with traditional screening method,the new meter can timely,accurately and automatically measure strips area and compute statistical distribution to provide a reference for fast thresher adjusting.