| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately and speedily obtain information stored in an underground buried body by accurately and speedily specifying the burying position of the underground buried body. SOLUTION: A stake 1 for survey as an underground burided body consists of a stake main body 1a and an auxiliary stake 1b, which is separable, and the auxiliary stake 1b has a transmission and reception circuit including a reception part, a transmission part, a memory, and a power source part inside. A communication device main body 3 radiates radio waves to the stake 1 for survey buried in the ground through a surveying machine 4. When the radio wave is received by the transmission and reception part in the auxiliary stake 1b, the power source part generates a source voltage, and the transmission and reception part begins to operate to send a signal of stored information out. The signal from the auxiliary stake 1b is received by the communication device main body 3 so as to obtain the information. Even when the stake main body 1a is lost, the presence of the auxiliary stake 1b and the information can be obtained from the auxiliary stake 1b left in the ground.</p> |
