| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure phase difference and distance with inexpensive constitution even when light cannot be received normally. SOLUTION: When all light receiving signals of four charge accumulated amount data are appropriate (120), the measuring device calculates the distance to a detection object using the four charge accumulated amount data (122). When three of the charge accumulated amount data are appropriate values (124), the measuring device corrects the charge accumulated amount data outside the normal charge amount range (126), and calculates the distance to the detection object based on the three charge accumulated amount data as the appropriate values and the corrected charge accumulated amount data (128). When only two of the charge accumulated amount data are appropriate values (130), the measuring device acquires the charge accumulated amount data during non-emission of light (132), calculates two distance candidates to the detection object based on the value obtained by removing a disturbance component from each of the two charge accumulated amount data having appropriate values (134 and 136), and selects a correct distance from distance candidates (138). COPYRIGHT: (C)2008,JPO&INPIT
|
