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In order to reduce measure standard uncertainty and achieve precise calibration of Port Quick Leak Detector in different temperatures under full range, the special calibration apparatus was designed on basis of theoretical studies. This apparatus consists of pressure standard leak system, calibration system, temperature control system, gas supply and pump system. Pressure standard leak system is made...
In this paper, we propose a novel calibration scheme for a tri-axial magnetometer used in a magnetic compass. We first demonstrate that the most commonly used calibration method for tri-axial magnetometer, which is based on ellipsoid fitting, is unable to determine the inter-triad misalignment in a multi-sensor system. Then we discuss an improved calibration scheme that utilizes the invariance of...
A calibration method for the outputs of magneto-resistive sensor and MEMS accelerometer in a tilt-compensated digital compass is introduced in this paper. Besides the magnetic deviation, the system errors of digital compass are generally affected by offsets, scale factors and misalignment errors of the sensors. The proposed method uses Poisson's equations of magnetic deviation to describe the errors...
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