关键词：光机电；传感器；惯性测量单元；辨识性能
摘 要：We compared classification capabilities for handheld electromagnetic sensors that were deployed using either a grid-based template for spatial registration or an IMU-based positioning system. Demonstration data were collected at the Aberdeen Proving Ground using both systems. The two data sets were analyzed separately and submitted to the Institute for Defense Analyses for grading. The IMU-based positioning system involved in this demonstration is known as the Small Area Inertial Navigation and Tracking (SAINT) system. It was developed by ENSCO as part of an earlier ESTCP project and enhanced and integrated with the EM61HH sensor in support of this effort. The SAINT system consists of a Honeywell HG1900 IMU and a LEICA DMC. The Honeywell HG1900 IMU consists of orthogonally aligned MEMS accelerometers and gyroscopes that record 3-axis acceleration and rotation rates, respectively enclosed in an 8-cubic inch container. The LEICA DMC is employed to aid the IMU and constrain heading drift. The digital magnetic compass measures the strength and direction of a magnetic field and can be used to determine magnetic north in an environment free of additional magnetic fields. SAINT records all IMU and digital magnetic compass data onto an internal compact flash card.