Abstract:In order to overcome the shortcomings of the existing polarization positioning technology unable to work at night, and give full play to the autonomy of polarization positioning technology, a method of vehicle autonomous positioning based on the moonlight polarized compass in the night is proposed. A bionic moonlight polarized compass sensor is designed, and a method for calculating the height of the moon based on the detection of the polarization threshold is improved. The right ascension, declination and Green hour angle of the moon are updated in real-time, and the latitude and longitude information of the vehicle is calculated by different moon height. Finally, static experiments are performed to verify the feasibility of the algorithm. Experimental results show that the method can obtain vehicle latitude and longitude information stably, and the positioning error is 42.34km. This method enhances the all-day performance of polarization positioning technology, and has important application value in the field of independent positioning in the night.