摘要
为满足高精度、大视距的数字水准测量需求,提出了一种新型二维复合编码的数字水准标尺编码规则,标尺条码由绝对编码和相对编码两列组成。绝对编码由不同宽度的黑白条码组成,沿标尺长度方向上若干个条码组合形成一个码段,采用二-十进制的编码规则唯一确定该码段在标尺上的绝对位置;相对编码由等宽度,相对大尺寸的黑白条码组成,通过同时存在于相对编码和绝对编码中的参考码表示标尺上的位置。针对所提出的编码规则,设计了视线位置的精确识读方法。对所设计水准标尺进行高差、重复性以及远视距实验,结果表明,该二维复合编码的水准测量在30 m以内的测量时间小于1.57 s,条码识别率为100%,最大偏差小于0.09 mm,具有解码快速、识别精确、稳定等优点。
To meet the requirements of high-precision and large-distance digital leveling measurement,a new two-dimensional composite encoding rule for the digital level ruler is proposed in this article.The leveling ruler consists of two column-coded bars,including an absolute-coded bar and a relative-coded bar.The absolute coded column consists of black and white stripes of different widths,and several coded bars along the ruler are combined to form a code segment adopting a binary-decimal coding rule,which uniquely determines the absolute position of the code segment on the ruler.The relative coded column consists of black and white stripes of equal width and relatively large size.The position on the ruler is represented by reference codes that exist simultaneously in the relative coded column and the absolute coded column.According to the proposed coding rules,an accurate reading method for the sight line is designed.The experiments of height difference,repeatavility and long visual distonce are carned out on teh designed level rkuler.The results show that the measurement time of the 2-D composite code is less than 1.57 s within 30 m,the barcode recognition rate is 100%,and the maximum deviation is less than 0.09 mm,which has the advantages of fast,accurate recognition and stability.
作者
黄秋红
潘莎莎
刘超
朱凌建
赵敏
Huang Qiuhong;Pan Shasha;Liu Chao;Zhu Lingjian;Zhao Min(School of Mechanical and Precision Instrument Engineering,Xi′an University of Technology,Xi′an 710048,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2023年第12期244-251,共8页
Chinese Journal of Scientific Instrument
基金
陕西省重点研发计划(2023-ZDLGY-14)项目资助。
关键词
二维复合编码
二-十进制解码
参考码
码段绝对位置
视线精确高度
two-dimensional composite coding
binary-decimal decoding
relative bars
segment absolute position
sight-line precision height
