| 摘要 |
PROBLEM TO BE SOLVED: To especially measure indoor reception level distribution by a cordless telephone and a PHS, etc., in a simple constitution without errors. SOLUTION: Wheels 12 and 31 are freely rotatably attached to both ends of a shaft 11, the rotation amounts Ra and Rb of the wheels 12 and 31 are detected in detectors 13 and 32, and they are moved inside a service area while limiting by turning only 90 deg. to the left and right. Ra-Rb is obtained every time the value of Ra equivalent to one meter is detected, right turning Dr is outputted when it is less than -Vth, forward movement Ds is outputted when it is -Vth to Vth, left turning Dl is outputted when it is more than Vth and they and a reception level from a measurement part 18 are stored in a storage part 19. |
