| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light wave distance meter capable of shortening a distance measurement time without making a filter position setting time longer. <P>SOLUTION: The light wave distance meter which has a variable density filter 25 for light reception quantity adjustment arranged between distance measurement optical paths 23 and is a phase difference type stores a distance measurement value, a filter position of the variable density filter 25, and a signal rejection rate of a distance measurement signal in storage means 51 each time a measurement is taken. When a measurement is taken, an arithmetic processing part 50 compares a sample distance measurement value calculated through sampling of the distance measurement signal with the distance measurement value in the storage means 51. Filter position adjustment means sets the variable density filter 25 at a most closing filter position among distance measurement value data when the difference is equal to or less than 1 m, and starts taking a distance measurement at the filter position when the signal rejection rate at the filter position is 0% or with a density a little larger than that at the filter position when the signal rejection rate is not 0%. A suitable filter position is determined by adjusting the filter position several times, so the signal rejection rate becomes lower to decrease the number of times of distance measurement, so that the distance measurement time can be shortened eventually. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
