| 摘要 |
PROBLEM TO BE SOLVED: To estimate the internal angle formed by line segments configuring the outer shape periphery of an object on a two-dimensional plane. SOLUTION: A composite sensor node is equipped with: a plurality of sensors for detecting presence of a shape estimation object within a sensing area; and a transmission means which transmits to a server the detection result information indicative of presence of the shape estimation object detected by each of the sensors. The server is equipped with: a measurement calculating means which calculates, where the internal angle of the vertex of the shape estimation object is α, the measure of a set of the composite sensor nodes as sensing results of detecting the shape estimation object by the specific composite sensor node and not detecting by the others among the composite sensor nodes from the parameters of the composite sensor nodes and α; an expectation value calculation means which calculates the expectation value of the sensing results for internal angles α<SB>1</SB>,..., α<SB>n</SB>(n is the number of internal angles) from the measure; and a search means which searches the internal angles α<SB>1</SB>,..., α<SB>n</SB>which decrease the differences between the sensing results and the expectation value. COPYRIGHT: (C)2011,JPO&INPIT
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