| 摘要 |
PROBLEM TO BE SOLVED: To provide a speed measurement device that reduces influence of a reflection wave to improve measurement precision of speed.SOLUTION: With a speed measurement device that radiates an electromagnetic wave of a millimeter wave band or a microwave band and measures the amount of change in frequency of a reflection wave to calculate speed, a reflection inhibition mechanism for the purpose of suppressing influence of the reflection wave other than a direct reflection wave from ground emerged in the reflection angle direction of the electromagnetic wave is provided.SELECTED DRAWING: Figure 8 |
