Layout Method of Multiseismic Detectors for Shallow Underground Excavation Applications

Table 1

Comparison of several common locating methods.

Locating method	Advantage	Disadvantage	Accuracy	Time-consuming
TOA	Simple technique and algorithm	Moving targets and nodes always are precisely synchronized. But it is susceptible to multipath propagation and noise	Relatively high	Long
TDOA	Relatively simple technique and algorithm	Accuracy is greatly affected by the environment, and it requires accurate synchronization of node clocks	Relatively high	Relatively long
DOA	Relatively simple technique and algorithm	Easily affected by the environment and low accuracy	Relatively low	Short
RSSI	Relatively simple technology, low cost, high precision for short range	It is easily affected by the environment, the accuracy is poor for outdoor long-range locating, and it is easily susceptible to multipath propagation	High (for short range), low (for long range)	/