3D-POSITION DECISION SYSTEM AND 3D-POSITION DECISION METHOD BASED MEMS INS FOR WORKER IN CONSTRUCTION FILED

摘要

An object of the present invention is to provide a system and method for detecting an absolute altitude of a worker in a construction site, which determines a reference altitude value indicated by a current pressure value, according to a constant altitude value and a pressure deviation of a reference station, thereby obtaining an absolute altitude value. To achieve the object, the present invention provides an MEMS INS-based system for determining a 3d-position of a worker in a construction site, which comprises: an MEMS INS-based sensor part which detects a posture of a moving station that is the worker in the construction site, and pressure information in a current position of the construction site; a posture data collecting and synchronizing part which collects and synchronizes posture data from the MEMS INS-based sensor part; a bias variation correcting part which estimates and corrects a bias change according to a temperature variation based on data from the posture data collecting and synchronizing part; a distance calculating part which calculates a travel distance and a direction of the worker, based on corrected data from the bias variation correcting part; a pressure data collecting and synchronizing part which collects and synchronizes pressure data from the MEMS INS-based sensor part, and weather data of a reference station that is a survey datum point in the construction site; an absolute altitude calculating part which determines an absolute altitude of the worker, based data from the pressure data collecting and synchronizing part; and a 3-D position determining part which estimates and determines the 3-D position of the worker, based on a value calculated by the distance calculating part and a value calculated by the absolute altitude calculating part. [Reference numerals] (100) MEMS INS-based sensor part; (110) Acceleration sensor; (120) Gyro sensor; (140) Geomagnetic sensor; (150) Pressure Sensor; (200) Posture data collecting and synchronizing part; (300) Bias variation correcting part; (400) Distance calculating part (D=Nw xSF); (410) Pace counting part; (420) Stride calculating part; (430) Directional angle calculating unit; (500) Pressure data collecting and synchronizing part; (600) Absolute altitude calculating part; (700) 3-D position determining part; (AA) Absolute altitude; (BB) Zd = absolute altitude(dX=DX cos(罐) dY=sin(罐))