By sending a probe wave by the detection unit and receiving the object the reflected wave, the reflection wave acquired based on the position detection information as a first object is used to detect the detection object in the detection range of the object in memory.
By sending a probe wave by the detection unit (11) and receives the object (50) the reflected wave, the reflected wave acquired based on the position detection information as a first object, to thereby detect the detection object in the detection range of the object in memory means (13), comprising: obtaining an image acquisition unit based on the position captured by the imaging unit (12) to the detection range of the image information of the second object detection information; determination area setting judgment area set in the detection range fixed unit; and a memory area is determined in a case where the first information and the second detection information is detected, the determination unit determines the position of the object based on the information of the position of the first object detection.