| 摘要 |
An object detection sensor, which can accurately measure the position of an object within a predetermined monitoring area including the vicinity of a position directly under a sensor, is provided. A monitoring area is divided into a plurality of sections and the distances to the section from the sensor are different from one another. A plurality of antennas designed to monitor the each sections respectively are switched therebetween in use. A signal processing circuit performs a calculation for determining a position and a height of an object within a monitoring surface in the area including the position directly under the sensor set, making use of output information of a radar and taking a radiation path into consideration.
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