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研究了正弦条码利用相位对位移进行编解码的原理及其在远距高程定位中的应用。基于单正弦条码,分析了条码宽度幅值、数字频率及成像个数对傅里叶法求解相位误差范围的影响,指出双正弦条码和三正弦条码相对于单正弦条码的实用性,并给出相应定位算法流程图。在成像器件与标尺成不同距离时利用三正弦条码尺进行距离和高度测量,结果表明,测量精度随距离增大而降低,距离为最小约39m和最大约62m时,距离测量精度分别为2mm和27mm;高度测量精度分别为0.03mm和0.07mm。
The principle of encoding and decoding displacement by sinusoidal bar code and its application in remote elevation positioning are studied. Based on the single-sine bar code, the influence of the width of the bar code, the digital frequency and the number of the imaging on the phase error range of the Fourier method is analyzed. The practicality of the double-sine bar code and the three-sine bar code relative to the single-sine bar code The corresponding positioning algorithm flow chart. When the distance between the imaging device and the ruler is different, the distance and height of the imaging device are measured by using a three-sine bar code scale. The results show that the accuracy of the measurement decreases with the increase of the distance, the distance measurement accuracy is 2mm and 27mm; height measurement accuracy of 0.03mm and 0.07mm.